JP2021126892A - Cleaning necessity determination module, cleaning necessity determination method and cleaning necessity determination program for blanket for printer - Google Patents

Abstract

To provide a cleaning necessity determination module for a blanket of a printer capable of suitably determining the necessity of cleaning processing to a blanket.SOLUTION: A printer includes cleaning necessity determination means 3 for acquiring a printing job and determining the necessity of cleaning processing of a blanket before executing printing processing based on the printing job, and the cleaning necessity determination means 3 includes printing number determination means 30 for determining whether a printing number information showing a printing number after cleaning processing is less than a number that enables printing continuation without performing the cleaning processing, image area ratio determination means 31 for determining whether the image area ratio of each inkpot key has the magnitude of an image area rate large enough to continue printing without performing the cleaning processing, size determination means 32 for determining whether the size of sheets does not change in changing printing jobs, and cleaning necessity determination means 33 for determining the necessity of the cleaning processing in accordance with determination results of the printing number determination means 30, the image area ratio determination means 31, and the size determination means 32.SELECTED DRAWING: Figure 2

Description

The present invention relates to a cleaning necessity determination module for determining the necessity of cleaning processing of a blanket of a printing machine, a cleaning necessity determination method, and a cleaning necessity determination program.

When a plurality of print jobs are executed in order in a conventional printing machine, the blanket (rubber cylinder) is cleaned at the timing of switching the print jobs. This cleaning process is performed using a cleaning device installed in the printing machine, and stains consisting of ink or the like deposited (adhered) on the blanket (rubber body) are removed by the cleaning liquid by executing the printing job.

In addition, the cleaning liquid remains on the blanket (rubber cylinder) after the cleaning treatment, and if the printing process is performed with the cleaning liquid remaining on the blanket, the effect of the cleaning liquid remaining on the blanket causes the printing immediately after the start of printing. Since printing defects occur in a predetermined number of printed matter, in order to prevent the printing defects, a process of wiping off the cleaning liquid remaining on the blanket after the above-mentioned cleaning process is performed.

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

JP-A-2002-59089

By the way, in the above-mentioned conventional printing machine, even if the blanket is slightly soiled due to printing of the previous printing job, the blanket is cleaned every time the printing job is switched, so that the cleaning liquid or the cleaning liquid remaining on the blanket remains. The cost of cleaning the blanket, such as the material used to wipe off the blanket, tends to increase.

Under these circumstances, it is desired to be able to determine the necessity of a blanket cleaning process for a conventional printing machine.

Therefore, in view of such circumstances, the present invention provides a blanket cleaning necessity determination module for a printing machine capable of suitably determining the necessity of cleaning treatment for a blanket, a cleaning necessity determination method, and a cleaning necessity determination program. Make it an issue.

The blanket cleaning necessity determination module for a printing machine of the present invention is
It is in a state of being acquired as a print job for transferring a print job in a reserved state to execution, and is provided with a cleaning necessity determination means for determining the necessity of a blanket cleaning process before executing a print process based on the print job.
The cleaning necessity determination means is
The number of prints information indicating the total number of prints in the print process based on the print job acquired between the time when the blanket cleaning process is finally performed and the time when the print job to be executed is acquired is acquired, and the number of prints is obtained. A printing number determination means for determining whether or not the information is less than the print sheet reference information indicating the number of sheets of sheets that can be continued to be printed without performing the cleaning process.
Image area ratio information indicating the image area ratio for each of a plurality of key points in the print process based on the print job acquired immediately before the print job to be executed is acquired, and the image area ratio information performs the cleaning process. An image area ratio determining means for determining whether or not the image area ratio is less than the image area ratio reference information indicating the magnitude of the image area ratio that allows printing to be continued without printing.
In the first size information indicating the size of the sheet of paper used for printing in the print process based on the print job acquired immediately before the print job to be executed, and the print process based on the print job to be executed. A size determination means for determining whether or not the second size information indicating the size of the sheet paper used for printing is the same, and
Whether the number of prints determination means determines that the number of prints information is not less than the number of prints reference information, or the image area ratio determination means determines that the image area ratio information is not less than the image area ratio reference information. When the size determination means determines that the first size information and the second size information are not the same, the size determination means includes a necessity determination means for determining that the cleaning process is necessary.

The method for determining the necessity of cleaning the blanket for the printing machine of the present invention is as follows.
Acquire as a print job to execute the reserved print job,
It is configured to determine the necessity of cleaning the blanket before executing the printing process based on the print job to be executed.
When determining the necessity of the cleaning treatment
The number of prints information indicating the total number of prints in the print process based on the print job acquired between the time when the blanket was finally cleaned and the time when the print job to be executed is acquired is acquired, and the printing is performed. A process for determining whether or not the number of sheets information is less than the number of printed sheets reference information indicating the number of sheets of paper that can be continued to be printed without performing the cleaning process.
Image area ratio information indicating the image area ratio for each of a plurality of key points in the print process based on the print job acquired immediately before the print job to be executed is acquired, and the image area ratio information performs the cleaning process. Processing to determine whether or not it is less than the image area ratio reference information indicating the size of the image area ratio that can continue printing without
In the first size information indicating the size of the sheet of paper used for printing in the print process based on the print job acquired immediately before the print job to be executed, and the print process based on the print job to be executed. The process of determining whether or not the second size information indicating the size of the sheet of paper used for printing is the same, and
Whether it is determined that the number of printed sheets information is not less than the number of printed sheets reference information, or the image area ratio information is determined not to be less than the image area ratio reference information, the first size information and the second size When it is determined that the information is not the same, the process of determining that the cleaning process is necessary is executed.

The blanket cleaning necessity determination program for a printing machine of the present invention is
Computer,
The print job in the reserved state is acquired as a print job to be executed, and is executed as a cleaning necessity determination means for determining the necessity of the blanket cleaning process before executing the print process based on the print job. Configured
The cleaning necessity determination means is
Finally, the number of print sheets information indicating the total number of prints in the print process based on the print job acquired between the time when the cleaning process of the blanket is performed and the time when the print job to be transferred to the execution is acquired is acquired. A number-of-prints determination means for determining whether or not the number of prints information is less than the number-of-prints reference information indicating the number of sheets of paper that can continue printing without performing the cleaning process.
Image area ratio information indicating the image area ratio for each of a plurality of key points in the print process based on the print job acquired immediately before the print job to be executed is acquired, and the image area ratio information performs the cleaning process. An image area ratio determining means for determining whether or not the image area ratio is less than the image area ratio reference information indicating the magnitude of the image area ratio that allows printing to be continued without printing.
In the first size information indicating the size of the sheet of paper used for printing in the print process based on the print job acquired immediately before the print job to be executed, and the print process based on the print job to be executed. A size determination means for determining whether or not the second size information indicating the size of the sheet paper used for printing is the same, and
Whether the number of prints determination means determines that the number of prints information is not less than the number of prints reference information, or the image area ratio determination means determines that the image area ratio information is not less than the image area ratio reference information. When the size determination means determines that the first size information and the second size information are not the same, the size determination means includes a necessity determination means for determining that the cleaning process is necessary.

In the blanket cleaning necessity determination module for the printing machine having the above configuration, the cleaning necessity determination method, and the cleaning necessity determination program, the number of printed sheets information is equal to or greater than the number of printed sheets reference information, or the image area ratio information is the image area. It is judged that the blanket cleaning process is required before the printing process based on the print job is executed because the rate standard information or more or the first size information and the second size information are different. It has become like.

On the other hand, when the number of printed sheets information is less than the number of printed sheets reference information, the image area ratio information is less than the image area ratio reference information, and the first size information and the second size information are the same. Before executing the printing process based on the print job, it is determined that the blanket cleaning process is unnecessary.

By determining whether or not to perform the blanket cleaning process when switching the print job based on the above determination, it is possible to reduce the printing cost.

That is, according to the cleaning necessity determination module for the blanket for the printing machine of the present invention, the cleaning necessity determination method, and the cleaning necessity determination program, it is possible to suitably determine the necessity of cleaning treatment for the blanket. Can play.

FIG. 1 is a partial schematic view of a printing machine according to an embodiment of the present invention. FIG. 2 is a block diagram of the function of the printing press according to the embodiment. FIG. 3 is a flowchart of the operation of the printing machine according to the embodiment. FIG. 4 is a flowchart of a process for determining the necessity of a cleaning process by the printing machine according to the embodiment.

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

In the present embodiment, the determination module will be described by taking as an example a printing machine in which the determination module is incorporated (that is, a printing machine having a blanket cleaning necessity determination function).

The printing press 1 of the present embodiment is configured to perform offset printing on sheet paper, and as shown in FIG. 1, an ink roller 11 for feeding out ink in the ink fountain 10 and ink. A sheet of paper is formed between the plate cylinder 12 arranged so as to be in contact with the roller 11, the blanket (rubber cylinder) 13 arranged so as to be in contact with the plate cylinder 12, and the blanket 13 in a state of being pressed against the blanket 13. It includes an indenter 14 configured to pass through, and a cleaning device 15 for cleaning the blanket 13. The printing machine is configured as a multi-color printing machine including a plurality of units shown in FIG.

The cleaning device 15 can remove ink and paper dust adhering to the blanket 13 by making the non-woven fabric impregnated with the cleaning liquid come into contact with the blanket 13, for example. It is configured in.

Further, as shown in FIG. 2, the printing machine 1 determines the necessity of cleaning the blanket 13 and the print job acquisition means 2 to be acquired as a print job that transfers the print job in the reserved state (before execution) to the execution. The determination means 3 as a module, the cleaning means 4 that executes the cleaning process of the blanket 13 according to the determination result of the necessity of cleaning the blanket 13 by the determination means 3, and the print job acquired by the print job acquisition means 2. A printing execution means 5 for executing a printing process for printing a sheet of paper based on the information shown is provided.

The print job is information that is an instruction for causing the printing machine 1 to print a sheet of paper. Further, in the print job, at least, the number of sheets designation information indicating the number of sheets to be printed, the image area ratio designation information indicating the image area ratio for each of the plurality of key points, and the size designation indicating the size of the sheet to be printed are specified. Contains information.

The determination means 3 is in a state of being acquired as a print job that transfers a print job in the reserved state (not executed) to execution, and determines whether or not the blanket 13 needs to be cleaned before executing the print process based on the print job. It is configured in.

The determination means 3 provides print number information indicating the total number of prints in the print process based on the print job acquired between the time when the blanket 13 is finally cleaned and the time when the print job to be executed is acquired. 2. The image area ratio information derived based on the image area ratio for each of a plurality of key points in the print process based on the print job acquired immediately before the print job to be transferred to is acquired, and the image area ratio information performs the cleaning process. The image area ratio determination means 31 for determining 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 printing, and the image area ratio determination means 31 acquired immediately before the print job to be executed. The first size information indicating the size of the sheet of paper used for printing in the printing process based on the printing job and the size of the sheet of paper used for printing in the printing process based on the printing job to be executed. It is necessary to clean the blanket 13 according to the judgment results of the size determination means 32 for determining whether or not the two size information is the same, the number of prints determination means 30, the image area ratio determination means 31, and the size determination means 32. It has a cleaning necessity determining means 33 for determining whether or not it is necessary.

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

Further, the size determination means 32 acquires, for example, the size designation information of the print job acquired by the print job acquisition means 2 and uses it as the second size information, and is acquired by the acquisition means immediately before the print job. It suffices that the print job size specification information is acquired and used as the first size information.

The number of printed sheets information is information indicating the number of sheets printed during the execution of the printing process based on the printing execution means 5, and the value is reset when the cleaning process is executed (to 0). Information (returned). The number of printed sheets reference information is set based on the number of printed sheets when the number of sheets of paper for removing the ink deposited 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 merit can be expected in comparison with the cost required when the cleaning process by the cleaning device 15 is executed. The number of printed sheets is determined by an experiment using a printing machine.

The number of sheets of paper for removing the ink accumulated on the blanket 13 is the ink accumulated on the blanket 13 by printing without supplying new ink to the blanket 13. This means the number of sheets of paper required from the start of removing the ink to the state in which the ink deposited on the blanket 13 is not printed (the state in which the ink is not transferred to the sheet of paper).

Further, the number-of-prints determining means 30 compares the number of prints information with the number-of-prints reference information, and if the number of prints indicated by the number-of-prints information is less than the number of prints indicated by the number-of-prints reference information, it is deposited on the blanket 13. If it is determined that the number of sheets of paper for removing the existing ink is equal to or less than the above-mentioned predetermined value, and the number of prints indicated by the number of print information is equal to or greater than the number of prints indicated by the number of print reference information, a blanket is used. It is determined that the number of sheets of paper for removing the ink deposited on 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 the 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 by an experiment using a printing machine. Since there is a correlation between the number of prints reference information and the image area ratio reference information, the values of both information are determined in consideration of their relevance to each other.

Further, the image area ratio determining means 31 compares the image area ratio information with the image area ratio reference information, and when 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 of paper for removing the ink deposited on the blanket 13 is equal to or less than the above-mentioned predetermined value, and the image area ratio indicated by the image area ratio information is the image area ratio reference information. If it is larger than the indicated image area ratio, it is determined that the number of sheets of paper for removing the ink deposited on the blanket 13 exceeds a predetermined value.

The size determination means 32 compares the first size information and the second size information, and executes when 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 area where the sheet sheet used for printing in the printing process based on the print job acquired immediately before the print job to be transferred to covers the blanket 13, and the sheet 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 blanket 13 is the same or substantially the same, and the edge of the sheet of paper used for printing in the printing process based on the printing job acquired immediately before the printing job to be executed. It is determined that the position on the blanket 13 and the position on the blanket 13 at the edge of the sheet of paper used for printing in the printing process based on the printing 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, it is used for printing in the printing process based on the print job acquired immediately before the print job to be executed. Immediately before the print job to be executed, as well as determining that the range in which the used sheet of paper covers the blanket 13 is different from the range in which the sheet of paper used for printing in the printing process based on the print job to be executed is to cover the blanket 13. The position on the blanket 13 of the edge of the sheet of paper used for printing in the printing process based on the print job acquired in, and the edge of the sheet of paper used for printing in the printing process based on the print job to be executed. It is determined that the position on the blanket 13 is different.

As a result, the size determining means 32 has a paper size relationship that can remove the ink accumulated on the blanket 13, and there is no possibility that the paper dust adhering to the blanket 13 causes printing defects. It is possible to judge whether it is related to paper size.

When the number-of-prints determination means 30 determines that the number of prints indicated by the number-of-prints information is equal to or greater than the number of prints indicated by the number-of-prints reference information, or when the image area ratio determination means 31 determines that the number of prints is equal to or greater than the number of prints indicated by the reference information. When it is determined that the image area ratio indicated by the area ratio information is equal to or greater than the image area ratio indicated by the image area ratio reference information, or 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 indicated sizes are the same or not substantially the same, it is determined that the blanket 13 needs to be cleaned. On the other hand, the cleaning necessity determining means 33 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 sheets reference information, and the image area ratio determining means 31 determines that the number of printed sheets is less than the number of printed sheets indicated by the image number reference information. 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 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 indicated sizes are the same or substantially the same, it is determined that the cleaning treatment for the blanket 13 is unnecessary.

The reason will be explained below. When the above-mentioned print sheet number information is less than the print sheet number reference information and the image area ratio information is less than the image area ratio reference information, it indicates that the amount of ink deposited on the blanket 13 is small.

When the printing process is executed without cleaning the blanket 13 in this state, the ink accumulated on the blanket 13 is removed by the sheet paper until the print quality (color tone) is not affected. The number of sheets of paper required will be small.

Therefore, the cost of this sheet of paper is smaller than the cost of the cleaning liquid required when the blanket 13 is cleaned and the material for wiping the cleaning liquid remaining on the blanket 13. That is, since it is possible to reduce the cost by not performing the cleaning process of the blanket 13 before executing the printing process based on the print job, it is determined that this state is 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 deposited on the blanket 13 is removed by the sheet paper used for printing in the printing process based on the print job to be executed. It cannot be denied that there may be an area on the blanket 13 that cannot be used. Further, when the second size information is larger than the first size information, the ink caused by the paper dust adhering to the blanket 13 is included in the image of the print in the print process based on the print job to be executed. It cannot be denied that there is a possibility that there is a place where poor transfer of ink occurs.

More specifically, since a large amount of paper dust adheres to the position of the edge of the sheet of paper on the blanket 13, printing based on the print job acquired immediately before the print job to be executed on the blanket 13. When the sheet edge used for printing in the process overlaps with the sheet edge used for printing in the print process based on the print job to be executed, in the print process based on the print job to be executed. There is a possibility that poor ink transfer may occur due to paper dust adhering to the printed image.

In order not to cause such a problem due to the paper dust adhering to the blanket 13, it is necessary to perform the printing process after removing the paper dust adhering to the blanket 13 by the cleaning process of the blanket 13 by the cleaning device 15. There is. Therefore, in order to determine that the blanket 13 is not required to be cleaned before the printing process based on the print job is executed, it is necessary to satisfy the condition that the first size information and the second size information are the same. Becomes.

However, usually, the printed sheet paper is cut off at the edge of the paper to make a product, so there is a slight difference between the first size information and the second size information (small paper size). Even if there is a difference), there is virtually no problem.

In this way, the cleaning necessity determination means 33 grasps the state of the ink accumulated on the blanket 13 and the adhering paper dust based on the number of printed sheets, the image area ratio, and the size of the sheet of paper, and is a cleaning device. When it is judged that there is a concern about printing defects due to the fact that the cost merit cannot be expected when the blanket 13 is not cleaned by the cleaning device 15 or the blanket 13 is not cleaned by the cleaning device 15, the blanket is used. It is configured to determine that the cleaning process of 13 is necessary.

The cleaning means 4 is configured to operate the cleaning device 15 to execute the cleaning process of the blanket 13 when the cleaning necessity determining means 33 determines that the cleaning process is necessary. The cleaning means 4 is configured to receive, for example, the determination result by the cleaning necessity determination means 33, and if the received determination result indicates that the blanket 13 needs to be cleaned, the cleaning process is performed. If the received determination result indicates that the cleaning process of the blanket 13 is unnecessary, the process may be terminated without executing the cleaning process.

The print execution means 5 is configured to be executed after the cleaning means 4. The print executing means 5 changes the setting of the printing machine 1 in the printing process, finishes printing the number of sheets of paper set in the designated number of sheets information after starting the process, or forcibly ends the process. Until this is done, the execution state of the print process continues. Therefore, the number of sheets printed by the trial printing, the main printing, or the like performed while the printing process is being executed is recorded in the number of printed sheets information.

The configuration of the printing machine 1 of the present embodiment is as described above. Subsequently, the operation of the printing machine 1 including the method of determining the operation necessity of the cleaning device 15 by the determination means 3 (cleaning necessity determination method) will be described. In this embodiment, the operation of the printing machine 1 from the time when the print job acquisition means 2 newly acquires the print job in the reserved state after the print job has been executed will be described.

As shown in FIG. 3, when the print job in the reserved state is acquired by the print job acquisition means 2 (S1), the process proceeds to the determination of the necessity of the cleaning process on the blanket 13 by the determination means 3 (cleaning necessity determination method). (S2).

When the determination means 3 determines that the blanket 13 needs to be cleaned (Yes in S3), the cleaning means 4 operates the cleaning device 15 to clean the blanket 13 (S4), and then the blanket 13 is cleaned. 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 the execution of the print process, a trial print and a main print (S5, S6) are sequentially performed.

When the determination means 3 determines that the cleaning process for the blanket 13 is not necessary (No in S3), it is based on the print job acquired by the print execution means 5 by the print job acquisition means 2 without performing the cleaning process for the blanket 13. The print process is executed, and the test print and the main print (S5, S6) are sequentially performed during the execution of the print process.

Then, when further acquiring the print job in the reserved state that has not been executed (Yes in S7), the print job acquisition means 2 again acquires the print job in the reserved state (S1).

In the cleaning necessity determination method, as shown in FIG. 4, a process (S20) of determining whether or not the print number information by the print number determination means 30 is less than the print number reference information, and an image area ratio determination means 31 are used. The process of determining whether or not the image area ratio information is less than the image area ratio reference information (S21) and whether or not the first size information and the second size information by the size determination means 32 are the same. The determination process (S22) is performed, and it is determined by the print number determination means 30 that the print number information exceeds the print number reference information (No in S20), or the image area ratio determination means 31 determines the image area. When it is determined that the rate information exceeds the image area rate reference information (No in S21), or when the size determination means 32 determines that the first size information and the second size information are different. (No in S22), the determination means 3 determines that the blanket 13 needs to be cleaned (S23).

On the other hand, the number of prints determination means 30 determines that the number of prints information is less than the number of prints reference information (Yes in S20), and the image area ratio determination means 31 determines that the image area ratio information is less than the image area ratio reference information. (Yes in S21), when the size determination means 32 determines that the first size information and the second size information are the same (Yes in S22), the determination means 3 cleans the blanket 13. It is determined that it is unnecessary (S24).

As described above, in the printing machine 1, ink and paper dust are deposited (adhered) to the blanket 13 by performing the printing process, so that the necessity of the cleaning process of the blanket 13 is determined when the printing job is switched.

The determination means 3 of the present embodiment cleans the amount of ink deposited on the blanket 13 from the viewpoint of cost when the number of printed sheets information exceeds the number of printed sheets reference information or the number of printed sheets information exceeds the number of printed sheets reference information. It is determined that the amount required for processing has been reached, and the ink accumulated on the blanket 13 is removed or adhered to the blanket 13 due to the difference between the first size information and the second size information. In order to avoid printing defects caused by the paper dust, it is judged that a cleaning process is necessary.

On the other hand, when the number of printed sheets information is less than the number of printed sheets reference information, the number of printed sheets information is less than the number of printed sheets reference information, and the first size information and the second size information are the same, the ink on the blanket 13 is printed. The amount of ink deposited on the blanket 13 has not reached the amount required for cleaning treatment from the viewpoint of cost, and printing defects caused by removal of ink accumulated on the blanket 13 or paper dust adhering to the blanket 13 Since it is determined that it is not necessary to perform the cleaning treatment for avoidance, it is possible to determine whether or not the cleaning treatment is necessary for the blanket 13.

Therefore, according to the determination means 3 of the present invention, it is possible to achieve an excellent effect that the necessity of the cleaning treatment for the blanket 13 can be suitably determined.

Further, since the printing machine 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, cleaning is performed while the cleaning process for the blanket 13 is unnecessary. By continuing other processing such as printing without executing the processing, it is possible to improve the work efficiency while suppressing the cost for cleaning the blanket 13.

The cleaning necessity determination module of the blanket 13 for the printing machine 1 of the present invention and the cleaning necessity determination method are not limited to the above-described embodiment, and are variously modified as long as the gist of the present invention is not deviated. Of course.

Although not particularly mentioned in the above embodiment, the cleaning necessity determination module is executed by, for example, a printing machine 1 or a cleaning necessity determination program incorporated in an external device connected to the printing machine 1. You may.

The cleaning necessity determination module of the above embodiment is integrally incorporated in the printing machine 1, but 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 machine 1 by wire or wirelessly. In this case, a printing system including a printing machine 1 and an external terminal incorporating a cleaning necessity determination module is constructed.

Although not particularly mentioned in the above embodiment, the image area ratio information to be compared with the image area ratio reference information by the image area ratio determining means 31 is the maximum of the plurality of image area ratio information acquired from each of the plurality of pot keys. It may be a value, or it may be an average value of a plurality of image area ratio information acquired from each of the plurality of pot keys. Further, the comparison between the image area ratio information and the image area ratio reference information by the image area ratio determining means 31 may be executed individually for each unit, or may be executed collectively for all the units. ..

1 ... printing machine, 2 ... printing job acquisition means, 3 ... judgment means, 4 ... cleaning means, 5 ... printing execution means, 10 ... ink pot, 11 ... ink roller, 12 ... plate cylinder, 13 ... blanket, 14 ... impression cylinder , 15 ... Cleaning device, 30 ... Number of prints determination means, 31 ... Image area ratio determination means, 32 ... Size determination means, 33 ... Necessity determination means

Claims (3)

It is in a state of being acquired as a print job for transferring a print job in a reserved state to execution, and is provided with a cleaning necessity determination means for determining the necessity of a blanket cleaning process before executing a print process based on the print job.
The cleaning necessity determination means is
The number of prints information indicating the total number of prints in the print process based on the print job acquired between the time when the blanket cleaning process is finally performed and the time when the print job to be executed is acquired is acquired, and the number of prints is obtained. A printing number determination means for determining whether or not the information is less than the print sheet reference information indicating the number of sheets of sheets that can be continued to be printed without performing the cleaning process.
Image area ratio information indicating the image area ratio for each of a plurality of key points in the print process based on the print job acquired immediately before the print job to be executed is acquired, and the image area ratio information performs the cleaning process. An image area ratio determining means for determining whether or not the image area ratio is less than the image area ratio reference information indicating the magnitude of the image area ratio that allows printing to be continued without printing.
In the first size information indicating the size of the sheet of paper used for printing in the print process based on the print job acquired immediately before the print job to be executed, and the print process based on the print job to be executed. A size determination means for determining whether or not the second size information indicating the size of the sheet paper used for printing is the same, and
Whether the number of prints determination means determines that the number of prints information is not less than the number of prints reference information, or the image area ratio determination means determines that the image area ratio information is not less than the image area ratio reference information. When the size determination means determines that the first size information and the second size information are not the same, the size determination means includes a necessity determination means for determining that the cleaning process is necessary.
A module for determining the necessity of cleaning blankets for printing machines. Acquire as a print job to execute the reserved print job,
It is configured to determine the necessity of cleaning the blanket before executing the printing process based on the print job to be executed.
When determining the necessity of the cleaning treatment
The number of prints information indicating the total number of prints in the print process based on the print job acquired between the time when the blanket was finally cleaned and the time when the print job to be executed is acquired is acquired, and the printing is performed. A process for determining whether or not the number of sheets information is less than the number of printed sheets reference information indicating the number of sheets of paper that can be continued to be printed without performing the cleaning process.
Image area ratio information indicating the image area ratio for each of a plurality of key points in the print process based on the print job acquired immediately before the print job to be executed is acquired, and the image area ratio information performs the cleaning process. Processing to determine whether or not it is less than the image area ratio reference information indicating the size of the image area ratio that can continue printing without
In the first size information indicating the size of the sheet of paper used for printing in the print process based on the print job acquired immediately before the print job to be executed, and the print process based on the print job to be executed. The process of determining whether or not the second size information indicating the size of the sheet of paper used for printing is the same, and
Whether it is determined that the number of printed sheets information is not less than the number of printed sheets reference information, or the image area ratio information is determined not to be less than the image area ratio reference information, the first size information and the second size When it is determined that the information is not the same, the process of determining that the cleaning process is necessary is executed.
A method for determining the necessity of cleaning a blanket for a printing machine. Computer,
The print job in the reserved state is acquired as a print job to be executed, and is executed as a cleaning necessity determination means for determining the necessity of the blanket cleaning process before executing the print process based on the print job. Configured
The cleaning necessity determination means is
Finally, the number of print sheets information indicating the total number of prints in the print process based on the print job acquired between the time when the cleaning process of the blanket is performed and the time when the print job to be transferred to the execution is acquired is acquired. A number-of-prints determination means for determining whether or not the number of prints information is less than the number-of-prints reference information indicating the number of sheets of paper that can continue printing without performing the cleaning process.
Image area ratio information indicating the image area ratio for each of a plurality of key points in the print process based on the print job acquired immediately before the print job to be executed is acquired, and the image area ratio information performs the cleaning process. An image area ratio determining means for determining whether or not the image area ratio is less than the image area ratio reference information indicating the magnitude of the image area ratio that allows printing to be continued without printing.
In the first size information indicating the size of the sheet of paper used for printing in the print process based on the print job acquired immediately before the print job to be executed, and the print process based on the print job to be executed. A size determination means for determining whether or not the second size information indicating the size of the sheet paper used for printing is the same, and
Whether the number of prints determination means determines that the number of prints information is not less than the number of prints reference information, or the image area ratio determination means determines that the image area ratio information is not less than the image area ratio reference information. When the size determination means determines that the first size information and the second size information are not the same, the size determination means includes a necessity determination means for determining that the cleaning process is necessary.
A program for determining the necessity of cleaning blankets for printing machines.

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