JP7441672B2 - A module for determining the necessity of cleaning blankets for printing machines, a method for determining the necessity of cleaning, and a program for determining the necessity of cleaning. - Google Patents

Description

The present invention relates to a cleaning necessity determining module, a cleaning necessity determining method, and a cleaning necessity determining program that determines whether cleaning processing is necessary for a blanket of a printing press.

When a conventional printing machine sequentially executes a plurality of print jobs, cleaning processing of the blanket (rubber cylinder) is performed in synchronization with the timing of switching print jobs. This cleaning process is performed using a cleaning device installed in the printing machine, and uses a cleaning liquid to remove stains such as ink and the like that have accumulated (adhered) on the blanket (rubber cylinder) during the execution of a print job.

In addition, cleaning liquid remains on the blanket (rubber cylinder) after cleaning, and if printing is performed with cleaning liquid remaining on the blanket, the effects of the cleaning liquid remaining on the blanket may cause Since printing defects occur on a predetermined number of printed materials, in order to prevent these printing defects, a process is performed to wipe off the cleaning liquid remaining on the blanket after the above-mentioned cleaning process is performed.

In the process of wiping off the cleaning liquid remaining on the blanket, for example, as disclosed in Patent Document 1, a sheet of paper is passed between the blanket cylinder and the impression cylinder after the cleaning process. The cleaning liquid remaining on the blanket (rubber cylinder) is being wiped off.

Japanese Patent Application Publication No. 2002-59089

By the way, in the above-mentioned conventional printing machine, even if the blanket is slightly dirty due to printing from the previous print job, the blanket is cleaned every time the print job is changed, so cleaning liquid and cleaning liquid remaining on the blanket are removed. The cost of cleaning blankets tends to increase due to the materials used to wipe them off.

Under these circumstances, it is desired to be able to determine whether or not blanket cleaning processing is necessary for conventional printing machines.

Therefore, in view of the above circumstances, the present invention provides a blanket cleaning necessity determination module for a printing press, a cleaning necessity determination method, and a cleaning necessity determination program that can suitably determine whether or not cleaning processing is necessary for the blanket. Take it as a challenge.

The module for determining the necessity of cleaning a blanket for a printing press according to the present invention includes:
A cleaning necessity determining means is provided in which a reserved print job is acquired as a print job to be executed, and determines whether cleaning processing of the blanket is necessary before execution of printing processing based on the print job,
The cleaning necessity determining means includes:
The number of printed sheets information indicating the total number of printed sheets in the printing process based on the print job acquired from the time when the blanket cleaning process was last performed until the print job to be executed is acquired, and the number of printed sheets is obtained. a number of printed sheets determining means for determining whether the information is less than the number of printed sheets reference information indicating the number of sheets that can continue printing without performing the cleaning process;
acquiring image area ratio information indicating an image area ratio for each of a plurality of key points in a print process based on a print job acquired immediately before the print job to be executed; image area ratio determination means for determining whether or not the image area ratio is less than image area ratio reference information indicating a size of the image area ratio that allows printing to be continued without
first size information indicating the size of the sheet used for printing in the print process based on the print job acquired immediately before the print job to be executed; and size determining means for determining whether or not the second size information indicating the size of the sheet used for printing is the same;
Whether the number of printed sheets information is determined by the number of printed sheets determining means to be less than the reference number of printed sheets information, or whether the image area ratio determining means determines that the image area ratio information is not less than the standard image area ratio information. and necessity determining means for determining that the cleaning process is necessary when the size determining means determines that the first size information and the second size information are not the same.

The method for determining the necessity of cleaning a blanket for a printing press according to the present invention is as follows:
Obtain a reserved print job as a print job to be executed,
configured to determine whether blanket cleaning processing is necessary before execution of printing processing based on the print job to be executed;
When determining whether the cleaning process is necessary,
Finally, the number of printed sheets information indicating the total number of printed sheets in the printing process based on the print job acquired from the time when the blanket cleaning process is performed until the time when the print job to be executed is acquired is obtained, a process of determining whether or not the number of sheets information is less than the number of printed sheets standard information indicating the number of sheets that can continue printing without performing the cleaning process;
acquiring image area ratio information indicating an image area ratio for each of a plurality of key points in a print process based on a print job acquired immediately before the print job to be executed; a process of determining whether or not the image area ratio is less than image area ratio reference information indicating a size of the image area ratio that allows printing to be continued without
first size information indicating the size of the sheet used for printing in the print process based on the print job acquired immediately before the print job to be executed; and a process of determining whether or not the second size information indicating the size of the sheet used for printing is the same;
Whether it is determined that the number of printed sheets information is not less than the number of printed sheet reference information, the image area ratio information is determined not to be less than the image area ratio standard information, or the first size information and the second size If it is determined that the information is not the same, the cleaning process is determined to be necessary.

The program for determining the necessity of cleaning a blanket for a printing press according to the present invention is as follows:
computer,
A print job in a reserved state is acquired as a print job to be executed, and is executed as a cleaning necessity determining means for determining whether blanket cleaning processing is necessary or not before execution of printing processing based on the print job. configured,
The cleaning necessity determining means includes:
Finally, print number information indicating the total number of sheets printed in the print process based on the print job acquired from the time when the cleaning process of the blanket is performed until the print job to be executed is acquired, and a number of printed sheets determining means for determining whether or not the number of printed sheets information is less than the number of printed sheets reference information indicating the number of sheets that can continue printing without performing the cleaning process;
acquiring image area ratio information indicating an image area ratio for each of a plurality of key points in a print process based on a print job acquired immediately before the print job to be executed; image area ratio determination means for determining whether or not the image area ratio is less than image area ratio reference information indicating a size of the image area ratio that allows printing to be continued without
first size information indicating the size of the sheet used for printing in the print process based on the print job acquired immediately before the print job to be executed; and size determining means for determining whether or not the second size information indicating the size of the sheet used for printing is the same;
Whether the number of printed sheets information is determined by the number of printed sheets determining means to be less than the reference number of printed sheets information, or whether the image area ratio determining means determines that the image area ratio information is not less than the standard image area ratio information. and necessity determining means for determining that the cleaning process is necessary when the size determining means determines that the first size information and the second size information are not the same.

In the blanket cleaning necessity determination module, cleaning necessity determination method, and cleaning necessity determination program for printing presses configured as described above, the number of printed sheets information is equal to or greater than the number of printed sheet reference information, or the image area ratio information is If the rate is equal to or higher than the standard information, or if the first size information and the second size information are different, it is determined that the blanket needs to be cleaned before executing the printing process based on the print job. It looks like this.

On the other hand, if the number of printed sheets information is less than the standard number of printed sheets information, the image area ratio information is less than the image area ratio standard information, and the first size information and the second size information are the same, It is determined that the blanket cleaning process is not necessary before execution of the printing process based on the print job.

By determining whether or not to perform blanket cleaning processing when switching print jobs based on the above-described judgment, it is possible to reduce printing costs.

That is, according to the blanket cleaning necessity determination module for printing presses, the cleaning necessity determination method, and the cleaning necessity determination program of the present invention, it is possible to suitably determine the necessity of cleaning the blanket. It can be played.

FIG. 1 is a partial schematic diagram of a printing press according to an embodiment of the present invention. FIG. 2 is a functional block diagram of the printing press according to the embodiment. FIG. 3 is a flowchart of the operation of the printing press according to the embodiment. FIG. 4 is a flowchart of a process for determining whether or not a cleaning process is necessary by the printing machine according to the embodiment.

Hereinafter, a module for determining the necessity of cleaning a blanket for a printing press (hereinafter referred to as a determination module) according to an embodiment of the present invention will be described.

In the present embodiment, the determination module will be explained by taking as an example a printing machine in which the determination module is incorporated (that is, a printing machine with a function of determining whether or not a blanket needs to be washed).

The printing press 1 of this embodiment is configured to perform offset printing on sheets of paper, and as shown in FIG. A sheet of paper is placed between a plate cylinder 12 disposed in contact with the roller 11, a blanket (blanket cylinder) 13 disposed in contact with the plate cylinder 12, and the blanket 13 in pressure contact with the blanket 13. An impression cylinder 14 configured to pass therethrough and a cleaning device 15 for cleaning the blanket 13 are provided. Note that this printing press is configured as a multicolor printing press that includes a plurality of units shown in FIG.

For example, the cleaning device 15 can remove ink accumulated on the blanket 13 and paper dust adhering to it by making a nonwoven fabric impregnated with a cleaning liquid moveable toward and away from the blanket 13. It is composed of

Further, as shown in FIG. 2, the printing machine 1 includes a print job acquisition unit 2 that acquires a print job in a reserved state (before execution) as a print job to be executed, and a determination unit 2 that determines whether cleaning of the blanket 13 is necessary. A determination means 3 as a module, a cleaning means 4 that executes a cleaning process for the blanket 13 according to a determination result of the determination means 3 as to whether or not cleaning of the blanket 13 is necessary, and a cleaning means 4 for executing a cleaning process for the blanket 13 according to the determination result of the determination means 3 as to whether or not the blanket 13 needs to be cleaned; It is provided with a printing execution means 5 that executes a printing process for printing a sheet based on the indicated information.

A print job is information that serves as a command for causing the printing machine 1 to print a sheet of paper. In addition, the print job includes at least number specification information indicating the number of sheets to be printed, image area ratio specification information indicating the image area ratio for each of multiple key points, and size specification indicating the size of the sheets to be printed. Contains information.

The determining means 3 is configured to acquire a reserved (unexecuted) print job as a print job to be executed, and to determine whether or not cleaning of the blanket 13 is necessary before executing print processing based on the print job. It is composed of

The determining means 3 generates print number information indicating the total number of sheets printed in the print process based on the print job acquired from the time when the blanket 13 was last cleaned until the print job to be executed is acquired. a number-of-printed-sheets determination means 30 that acquires the number-of-printed-sheets information and determines whether or not the number of printed sheets information is less than the number-of-printed-sheets standard information set as the number of sheets that can continue printing without performing a cleaning process; image area ratio information derived based on the image area ratio for each of the plurality of key keys in the print process based on the print job that was acquired immediately before the print job to be transferred to the print job, and the image area ratio information is determined by the cleaning process. image area ratio determination means 31 that determines whether or not the image area ratio is less than the image area ratio reference information set as the size of the image area ratio that allows printing to be continued without the need for printing; first size information indicating the size of the sheet used for printing in the print process based on the print job to be executed; and second size information indicating the size of the sheet used for printing in the print process based on the print job to be executed. The need for cleaning the blanket 13 is determined based on the results of the determination by the size determining means 32, the number of printed sheets determining means 30, the image area ratio determining means 31, and the size determining means 32. cleaning necessity determining means 33 for determining whether cleaning is necessary or not.

Note that the image area ratio determining means 31 may be configured to acquire image area ratio designation information and use it as image area ratio information.

Further, the size determining means 32 acquires, for example, the size specification information of the print job acquired by the print job acquiring means 2 and uses it as second size information, and uses the size information acquired by the acquiring means immediately before the print job as second size information. It is sufficient that the configuration is such that the size designation information of the print job is acquired and used as the first size information.

The number of printed sheets information is information indicating the number of sheets printed during execution of the printing process based on the printing execution means 5, and the value is reset (set to 0) when the cleaning process is executed. information returned). The number of printed sheets standard information is set based on the number of printed sheets when the number of sheets required to remove ink accumulated on the blanket 13 is equal to or less than a predetermined value. The predetermined value is determined based on whether or not a cost benefit can be expected by comparing with the cost required when the cleaning process by the cleaning device 15 is executed. Further, the number of printed sheets is determined through experiments using a printing machine.

Note that the number of sheets for removing ink accumulated on the blanket 13 refers to the number of sheets used to remove ink accumulated on the blanket 13 by printing without supplying new ink to the blanket 13. When removing ink, it means the number of sheets required from the start of ink removal until the ink accumulated on the blanket 13 becomes unprinted (not transferred to the sheet).

Further, the number of printed sheets determining means 30 compares the number of printed sheets information with the standard information on the number of printed sheets, and if the number of printed sheets indicated by the number of printed sheets information is less than the number of printed sheets indicated by the standard number of printed sheets information, the number of printed sheets is accumulated on the blanket 13. If it is determined that the number of sheets to be used to remove ink is below the predetermined value mentioned above, and the number of printed sheets indicated by the number of printed sheets information is greater than or equal to the number of printed sheets indicated by the number of printed sheet standard information, the blanket It is determined that the number of sheets to remove the ink accumulated on the paper 13 exceeds the above-mentioned predetermined value.

The image area ratio reference information is set based on the image area ratio at which the number of sheets for removing ink deposited on the blanket 13 is equal to or less than the above-mentioned predetermined value. This image area ratio reference information is determined through experiments using a printing machine. Note that since there is a correlation between the print number standard information and the image area ratio standard information, the values of both pieces of information are determined by taking into account their mutual relationship.

Further, the image area ratio determination means 31 compares the image area ratio information and the image area ratio reference information, and if the image area ratio indicated by the image area ratio information is smaller than the image area ratio indicated by the image area ratio reference information, , it is determined that the number of sheets for removing ink accumulated on the blanket 13 is below the above-mentioned predetermined value, and the image area ratio indicated by the image area ratio information is determined to be higher than the image area ratio reference information. If the image area ratio is larger than the indicated image area ratio, it is determined that the number of sheets for removing ink accumulated on the blanket 13 exceeds a predetermined value.

The size determining means 32 compares the first size information and the second size information, and if the size indicated by the first size information and the size indicated by the second size information are the same or substantially the same, the size judgment means 32 executes The area where the sheets used for printing in the print process based on the print job acquired immediately before the print job to be transferred covers the blanket 13, and the sheet used for printing in the print process based on the print job to be executed. It is determined that the area covered by the paper is the same or approximately the same as the area covered by the blanket 13, and the edge of the sheet used for printing in the printing process based on the print job that was obtained immediately before the print job to be executed is determined. It is determined that the position on the blanket 13 and the position on the blanket 13 of the edge of the sheet used for printing in the printing process based on the print job to be executed are the same or substantially the same.

On the other hand, if the size indicated by the first size information and the size indicated by the second size information are different, the It is determined that the range covered by the blanket 13 by the sheet of paper used for printing is different from the range covered by the blanket 13 by the sheet used for printing in the printing process based on the print job to be executed, and the area immediately before the print job to be executed is determined to be different. The position on the blanket 13 of the edge of the sheet used for printing in the print process based on the print job that was acquired in It is determined that the position on the blanket 13 is different.

As a result, the size determining means 32 determines whether the paper size is such that the ink accumulated on the blanket 13 can be removed, and whether there is a possibility that paper dust adhering to the blanket 13 will cause printing defects. It is now possible to determine whether the paper size is related.

The cleaning necessity determining means 33 is activated when the number of printed sheets determining means 30 determines that the number of printed sheets indicated by the number of printed sheets information is greater than or equal to the number of printed sheets indicated by the number of printed sheet reference information, or when the image area ratio determining means 31 determines that the When it is determined that the image area ratio indicated by the area ratio information is greater than or equal to the image area ratio indicated by the image area ratio reference information, or when the size determination means 32 determines that the size indicated by the first size information and the second size information are When it is determined that the sizes shown are not the same or substantially the same, it is determined that the blanket 13 requires cleaning treatment. On the other hand, the cleaning necessity determining means 33 determines that the number of printed sheets determining means 30 determines that the number of printed sheets indicated by the number of printed sheets information is less than the number of printed sheets indicated by the number of printed sheet reference information, and the image area ratio determining means 31 It is determined that the image area ratio indicated by the image area ratio information is less than the image area ratio indicated by the image area ratio reference information, and the size determining means 32 determines that the size indicated by the first size information and the second size information are different from each other. When it is determined that the sizes shown are the same or substantially the same, it is determined that the cleaning process for the blanket 13 is unnecessary.

The reason is explained below. The fact that the above-mentioned printed sheet number information is less than the printed sheet number standard information and that the image area ratio information is less than the image area ratio standard information indicates that the amount of ink deposited on the blanket 13 is small.

If the printing process is executed in this state without cleaning the blanket 13, the ink accumulated on the blanket 13 will be removed by the sheets of paper and will no longer affect the print quality (color tone). The number of such sheets required will be small.

Therefore, the cost for this sheet is smaller than the cost for the cleaning liquid required when cleaning the blanket 13 and the materials for wiping off the cleaning liquid remaining on the blanket 13. In other words, since it is possible to reduce costs by not performing the cleaning process on the blanket 13 before executing the printing process based on the print job, this state is determined to be a state in which printing can be continued without performing the cleaning process. can.

However, if the second size information is smaller than the first size information, the ink accumulated on the blanket 13 is removed from the sheet used for printing in the printing process based on the print job to be executed. We cannot deny the possibility that there are areas on the blanket 13 where this is not possible. Furthermore, if the second size information is larger than the first size information, ink caused by paper powder adhering to the blanket 13 may be present in the printed image in the printing process based on the print job to be executed. We cannot deny the possibility that there are locations where poor metastasis occurs.

To explain in detail, since most paper dust adheres to the position of the paper edge of the sheet on the blanket 13, printing based on the print job that was acquired immediately before the print job to be executed on the blanket 13 If the paper edge position of the sheet used for printing in the process overlaps with the sheet used for printing in the print process based on the print job to be executed, the edge position of the sheet used for printing in the print process based on the print job to be executed will overlap. This means that ink transfer failure may occur due to paper dust adhering to the printed image.

In order to avoid such problems due to paper dust adhering to the blanket 13, it is necessary to remove the paper dust adhering to the blanket 13 by cleaning the blanket 13 with the cleaning device 15 before printing. There is. Therefore, in order to determine that the blanket 13 is not in a state that requires cleaning before execution of printing processing based on a print job, it is necessary to satisfy the condition that the first size information and the second size information are the same. becomes.

However, since printed sheets are usually cut off at their edges to become products, there may be slight differences between the first size information and the second size information (a slight difference in paper size). Even if there is a difference, there is practically no problem.

In this way, the cleaning necessity determining means 33 grasps the state of the ink accumulated on the blanket 13 and the paper dust attached to the blanket 13 based on the number of printed sheets, image area ratio, and sheet size, and the cleaning device 15, or when it is determined that there is a concern about printing defects due to not cleaning the blanket 13 using the cleaning device 15. The system is configured to determine that No. 13 cleaning processing is necessary.

The cleaning means 4 is configured to operate the cleaning device 15 to perform the cleaning process on the blanket 13 when the cleaning necessity determining means 33 determines that the cleaning process is necessary. The cleaning means 4 is configured to, for example, receive the determination result by the cleaning necessity determining means 33, and if the received determination result indicates that the blanket 13 needs cleaning processing, it performs the cleaning processing. If the received determination result indicates that the cleaning process of the blanket 13 is unnecessary, the process may be configured to end without performing the cleaning process.

The printing execution means 5 is configured to be executed after the cleaning means 4. The printing execution unit 5 changes the settings of the printing press 1 during the printing process, and after starting the process, finishes printing the number of sheets set in the specified number of sheets information, or forcibly terminates the process. Until this happens, the printing process continues to be executed. Therefore, the number of sheets printed in trial printing, actual printing, etc. performed while the printing process is in the execution state is included in the printed sheet number information.

The configuration of the printing press 1 of this embodiment is as described above. Next, the operation of the printing press 1 will be explained, including a method for determining whether or not the cleaning device 15 needs to be operated by the determining means 3 (cleaning necessity determining method). In this embodiment, the operation of the printing press 1 will be described from the time when the print job acquisition unit 2 newly acquires a reserved print job after the print job has been executed.

As shown in FIG. 3, when the print job acquisition unit 2 acquires a reserved print job (S1), the determination unit 3 then proceeds to determine whether or not the cleaning process for the blanket 13 is necessary (cleaning necessity determination method). (S2).

If the determining means 3 determines that the blanket 13 needs to be cleaned (Yes in S3), the cleaning means 4 operates the cleaning device 15 to perform the cleaning process on the blanket 13 (S4), and then Then, the print execution means 5 executes a print process based on the print job acquired by the print job acquisition means 2, and during execution of the print process, trial printing and actual printing (S5, S6) are sequentially performed.

If the determining unit 3 determines that the cleaning process for the blanket 13 is not necessary (No in S3), the printing execution unit 5 performs the cleaning process based on the print job acquired by the print job acquiring unit 2 without performing the cleaning process for the blanket 13. Printing processing is executed, and during execution of the printing processing, trial printing and actual printing (S5, S6) are sequentially performed.

Then, if additional unexecuted print jobs in the reservation state are to be acquired (Yes in S7), the print job acquisition means 2 acquires the print jobs in the reservation state again (S1).

As shown in FIG. 4, the cleaning necessity determination method includes a process (S20) of determining whether the number of printed sheets information by the number of printed sheets determining means 30 is less than the number of printed sheet reference information, and a process of determining whether the number of printed sheets is less than the standard information of the number of printed sheets by the image area ratio determining means 31. The process of determining whether the image area ratio information is less than the image area ratio reference information (S21) and the process of determining whether the first size information and the second size information by the size determining means 32 are the same. A process of determining (S22) is performed, and whether the number of printed sheets information is determined by the number of printed sheets judgment means 30 to be larger than the standard information of the number of printed sheets (No in S20), or the image area ratio judgment means 31 is determined that the number of printed sheets exceeds the standard information of the number of printed sheets. If it is determined that the ratio information exceeds the image area ratio reference information (No in S21), or if the size determination means 32 determines that the first size information and the second size information are different. (No in S22), the determining means 3 determines that cleaning processing of the blanket 13 is necessary (S23).

On the other hand, the number of printed sheets determining means 30 determines that the number of printed sheets information is less than the standard information on the number of printed sheets (Yes in S20), and the image area ratio determining means 31 determines that the image area ratio information is less than the standard image area ratio information. (Yes in S21), and if the size determining means 32 determines that the first size information and the second size information are the same (Yes in S22), the determining means 3 determines whether the cleaning process for the blanket 13 is It is determined that it is unnecessary (S24).

As described above, in the printing machine 1, ink and paper powder accumulate (adhere) on the blanket 13 when printing is performed, and therefore, the necessity of cleaning the blanket 13 is determined when switching print jobs.

The determining means 3 of the present embodiment determines whether the amount of ink accumulated on the blanket 13 is reduced from a cost perspective when the number of printed sheets exceeds the standard information on the number of printed sheets, or when the number of printed sheets exceeds the standard information on the number of printed sheets. It is determined that the amount of ink that requires processing has been reached, and that the first size information and the second size information are different, so that the ink accumulated on the blanket 13 is removed or the ink that is attached to the blanket 13 is removed. In order to avoid printing defects caused by paper dust, it is determined that cleaning processing is necessary.

On the other hand, if the number of printed sheets information is less than the standard number of printed sheets information, the number of printed sheets information is less than the standard number of printed sheets information, and the first size information and second size information are the same, the ink on the blanket 13 is The amount of accumulated ink on the blanket 13 has not reached the amount that requires cleaning treatment from a cost perspective, and it is necessary to remove the ink accumulated on the blanket 13 or to prevent printing defects caused by paper dust adhering to the blanket 13. Since it is determined that there is no need to perform a cleaning process to avoid this, it is possible to determine whether or not the cleaning process for the blanket 13 is necessary.

Therefore, according to the determination means 3 of the present invention, it is possible to achieve the excellent effect of being able to suitably determine whether or not the cleaning treatment for the blanket 13 is necessary.

Furthermore, the printing press 1 of the present embodiment is configured to operate the cleaning device 15 after determining whether or not the cleaning process for the blanket 13 is necessary. By continuing other processes such as printing without executing the process, it is possible to reduce the cost of cleaning the blanket 13 and improve work efficiency.

It should be noted that the module for determining the necessity of cleaning the blanket 13 for the printing press 1 and the method for determining the necessity of cleaning of the blanket 13 for the printing press 1 according to the present invention are not limited to the above-mentioned embodiment, and can be modified in various ways without departing from the gist of the present invention. Of course, it is necessary to do the following.

Although not specifically mentioned in the above embodiment, the cleaning necessity determination module is executed by, for example, a cleaning necessity determination program built into the printing press 1 or an external device connected to the printing press 1. You can.

Although the cleaning necessity determination module of the embodiment described above is integrated into the printing press 1, the present invention is not limited to this configuration. For example, the cleaning necessity determination module may be incorporated in an external terminal connected to the printing press 1 by wire or wirelessly. In this case, a printing system is constructed that includes the printing press 1 and an external terminal in which a cleaning necessity determination module is incorporated.

Although not specifically mentioned in the above embodiment, the image area ratio information that the image area ratio determination means 31 compares with the image area ratio reference information is the maximum of the plurality of image area ratio information acquired from each of the plurality of acupoint keys. It may be a value, or it may be an average value of a plurality of pieces of image area ratio information acquired from each of a plurality of acupoint keys. Further, the comparison between the image area ratio information and the image area ratio reference information by the image area ratio determination means 31 may be performed individually for each unit, or may be performed for all units at once. .

DESCRIPTION OF SYMBOLS 1... Printing machine, 2... Print job acquisition means, 3... Judgment means, 4... Cleaning means, 5... Print execution means, 10... Ink fountain, 11... Ink roller, 12... Plate cylinder, 13... Blanket, 14... Impression cylinder , 15...Cleaning device, 30...Number of printed sheets judgment means, 31...Image area ratio judgment means, 32...Size judgment means, 33...Necessity judgment means

Claims (3)

A cleaning necessity determining means is provided in which a reserved print job is acquired as a print job to be executed, and determines whether cleaning processing of the blanket is necessary before execution of printing processing based on the print job,
The cleaning necessity determining means includes:
The number of printed sheets information indicating the total number of printed sheets in the printing process based on the print job acquired from the time when the blanket cleaning process was last performed until the print job to be executed is acquired, and the number of printed sheets is obtained. a number of printed sheets determining means for determining whether the information is less than the number of printed sheets reference information indicating the number of sheets that can continue printing without performing the cleaning process;
acquiring image area ratio information indicating an image area ratio for each of a plurality of key points in a print process based on a print job acquired immediately before the print job to be executed; image area ratio determination means for determining whether or not the image area ratio is less than image area ratio reference information indicating a size of the image area ratio that allows printing to be continued without
first size information indicating the size of the sheet used for printing in the print process based on the print job acquired immediately before the print job to be executed; and size determining means for determining whether or not the second size information indicating the size of the sheet used for printing is the same;
Whether the number of printed sheets information is determined by the number of printed sheets determining means to be less than the reference number of printed sheets information, or whether the image area ratio determining means determines that the image area ratio information is not less than the standard image area ratio information. If the size determining means determines that the first size information and the second size information are not the same, it is determined that the cleaning process is necessary, and the number of printed sheets is determined by the number of printed sheets determining means. information is determined to be less than the print number standard information, and the image area ratio determining means determines that the image area ratio information is less than the image area ratio standard information, and the size determining means determines that the image area ratio information is less than the image area ratio standard information. necessity determining means for determining that the cleaning process is unnecessary when it is determined that the first size information and the second size information are the same ;
A module that determines the necessity of cleaning blankets for printing machines. Obtain a reserved print job as a print job to be executed,
configured to determine whether blanket cleaning processing is necessary before execution of printing processing based on the print job to be executed;
When determining whether the cleaning process is necessary,
Finally, the number of printed sheets information indicating the total number of printed sheets in the printing process based on the print job acquired from the time when the blanket cleaning process is performed until the time when the print job to be executed is acquired is obtained, a process of determining whether or not the number of sheets information is less than the number of printed sheets standard information indicating the number of sheets that can continue printing without performing the cleaning process;
acquiring image area ratio information indicating an image area ratio for each of a plurality of key points in a print process based on a print job acquired immediately before the print job to be executed; a process of determining whether or not the image area ratio is less than image area ratio reference information indicating a size of the image area ratio that allows printing to be continued without
first size information indicating the size of the sheet used for printing in the print process based on the print job acquired immediately before the print job to be executed; and a process of determining whether or not the second size information indicating the size of the sheet used for printing is the same;
Whether it is determined that the number of printed sheets information is not less than the number of printed sheet reference information, the image area ratio information is determined not to be less than the image area ratio standard information, or the first size information and the second size If it is determined that the information is not the same, it is determined that the cleaning process is necessary , and it is determined that the number of printed sheets information is less than the number of printed sheet reference information, and the image area ratio information is equal to the image area. a process of determining that the cleaning process is unnecessary when it is determined that the first size information and the second size information are the same, and that the first size information and the second size information are the same; Execute,
How to determine whether or not a printing press blanket needs to be cleaned. computer,
A print job in a reserved state is acquired as a print job to be executed, and is executed as a cleaning necessity determining means for determining whether blanket cleaning processing is necessary or not before execution of printing processing based on the print job. configured,
The cleaning necessity determining means includes:
Finally, print number information indicating the total number of sheets printed in the print process based on the print job acquired from the time when the cleaning process of the blanket is performed until the print job to be executed is acquired, and a number of printed sheets determining means for determining whether or not the number of printed sheets information is less than the number of printed sheets reference information indicating the number of sheets that can continue printing without performing the cleaning process;
acquiring image area ratio information indicating an image area ratio for each of a plurality of key points in a print process based on a print job acquired immediately before the print job to be executed; image area ratio determination means for determining whether or not the image area ratio is less than image area ratio reference information indicating a size of the image area ratio that allows printing to be continued without
first size information indicating the size of the sheet used for printing in the print process based on the print job acquired immediately before the print job to be executed; and size determining means for determining whether or not the second size information indicating the size of the sheet used for printing is the same;
Whether the number of printed sheets information is determined by the number of printed sheets determining means to be less than the reference number of printed sheets information, or whether the image area ratio determining means determines that the image area ratio information is not less than the standard image area ratio information. If the size determining means determines that the first size information and the second size information are not the same, it is determined that the cleaning process is necessary, and the number of printed sheets is determined by the number of printed sheets determining means. information is determined to be less than the print number standard information, and the image area ratio determining means determines that the image area ratio information is less than the image area ratio standard information, and the size determining means determines that the image area ratio information is less than the image area ratio standard information. necessity determining means for determining that the cleaning process is unnecessary when it is determined that the first size information and the second size information are the same ;
A program to determine whether or not cleaning of printing press blankets is necessary.