JPH04305456A - Method for automatically setting printing condition of printing press - Google Patents

Abstract

PURPOSE:To provide a method wherein the set value, measured value or the like at every constitutional part of an existing rotary press are stored in a CPU as a table and a printing condition is automatically set on the basis of the data in said table at the time of the setting of the next printing press. CONSTITUTION:A calculation formula determined from the aspect of the planning of a rotary press, an experientially calculated set value, a correction value obtained by automatically setting the respective parts of the respective devices of the rotary press on the basis of said set value and subsequently further performing fine adjustment by the above mentioned actual machine and the measured value measured by a sensor during the operation of the rotary press are obtained on the basis of the fundamental conditions and printing items and formed into a table along with the printing items and the fundamental conditions with respect to many printing items to be stored in a data base and the optimum set value coinciding with the fundamental condition of the printing item of the next work is searched from the aforementioned table to be calculated and set the set value of the printing item of the next work.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic printing condition setting method for automatically setting each part of each device constituting a rotary press in accordance with the basic conditions of a printing item.

0002

2. Description of the Related Art FIGS. 4 and 5 show an example of the layout of a blanket-to-blanket type offset rotary printing press. This rotary printing press includes a paper feed section 1, an infeed section 2, a printing section 3 consisting of four printing units, a drying section 4, and a cooling section 5.
, a web path 6 and a folding machine 7 are provided.

[0003] Conventionally, basic conditions determined by the printing item (folder), such as paper weight, paper size (especially paper width),
Depending on the paper quality and folding specifications such as B3 newspaper folding, tabloid, B4 folding, B5 folding, etc., the parts that constitute the various devices 1 to 7 of the rotary press, such as the printing cylinder of the printing section 3, the cooling cylinder of the cooling section 5, and the web path 6. Setting the position in the width direction of a rotary press such as a turn bar, a compensating roller, a drag roller, a cylinder for parallel folding of the folding machine 7, and a cutter for perpendicular folding, and the position of the infeed part 2 driven by a continuously variable transmission. Drive roller, (PIV drive) printing cylinder of the printing section 3, drag roller (VIP drive) of the web path 3 Setting paper tension by setting constant circumferential speed ratio, folding machine 7 according to folding specifications
The selection of the parts to be used and the settings for the timing are made every time the print item changes. (The tension of the paper in the infeed section 2 may be set by the air pressure of the dancer roller). This setting is determined by the position in the width direction of the rotary press, the selection and timing of each part of the folding machine according to the folding specifications, and the selection and timing of each part of the folding machine are determined by calculation formulas determined in the design of the rotary press. ) is adjusted using set values calculated based on conventional experience. The printing conditions set using these set values are finely adjusted (corrected) on the actual machine and used as correction values, and the rotary press is operated using these correction values.

0004

SUMMARY OF THE INVENTION The above-mentioned prior art has the following problems. Conventionally, each time the basic conditions were determined depending on the printing item, each part of each device was set using the setting values calculated using the calculation formula determined in the rotary press design and the empirical formula, and then the setting values were determined using the actual machine. The rotary press is operated with this correction value after making slight adjustments to it.

[0005] Therefore, many calculations and setting of each part require time and effort. Also, each time a job for the same print item comes in, the same calculations and fine-tuning are repeated over and over again. Therefore, some places create visible tables,
Since there are many parts that require settings for each part of the rotary press, it is difficult to create a table for all parts.
Moreover, since this is used, it is difficult to extract those having the same basic conditions from a large number of tables.

[0006] The present invention stores setting values, measured values, etc. for each component of an existing rotary printing press as a list in the CPU, and when setting the next printing press, print conditions are determined using the data in this list. The purpose is to propose an automatic setting method.

[0007]

[Means for solving the problem] (1) Setting values calculated using calculation formulas and empirical formulas determined in rotary press design based on basic conditions given for each printing item, and using these setting values to After setting each part of A list of conditions for many printing items,
Save to the console's computer database. (2) For the next printing item, search to see if there is one that matches the basic conditions of this printing item in the list (table) above, and if there is one with the same conditions, or if there is a Continuous quantities such as quantities have a width as a matching condition,
The correction value or measured value of the existing print item having the same basic conditions is used as the setting value for setting the print condition of the next print item. (3) When there is no matching print item, start by calculating the set value using calculation formulas and empirical formulas, and when correction values and measured values are obtained, add them to the list.

[0008]

[Operations] (1) Since there are nearly 100 printing items input and stored in the database, almost all combinations of basic conditions of printing items that are actually ordered are covered. (2) Therefore, there is always an existing print item with the same basic conditions as the next print item, and it can be easily extracted. Furthermore, since the correction value or measured value of an existing print item is set as the setting value, there is almost no need to further fine-tune the setting. (3) The setting values and correction values are calculated and fine-tuned as before, but the data in the list stored in the database increases the probability of matching when searching.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a block diagram of an automatic printing condition setting system according to the present invention. The console 11 includes a computer (CPU), a picture tube (CRT), and a printer.
pu is the paper feed interface (hereinafter referred to as I/F)
, folder I/F, dryer I/F, and peripheral devices.

[0010] This console 11 has been created based on the basic conditions for each printing item and the procedure shown in FIG. Setting values calculated by the CPU using empirical formulas, and corrections obtained by setting each part of each device via the interface and sequencer of each device using these setting values, and then fine-tuning each set part. Figure 2 shows the values measured by a sensor (not shown) during operation of the rotary press.
A list of each part is created and stored in the database in the console 11, as shown in FIG.

[0011] Since about 100 types of printing items are listed in this list, it can be considered that most of the printing items and their basic conditions for the next job are memorized. Therefore, this list is searched to find an existing print item with the same conditions as the next print item, or with a wider range of paper weights, etc. The found correction value or measured value of the print item is used as the set value for the next print item, and is displayed on the CRT or printer, and each part of the rotary press is set according to the set value.

[0012] If the same one cannot be found, calculate it using the CPU calculation formula and empirical formula as described above.
Setting values are determined, each part is set using these setting values, and fine adjustments are made and set using the actual machine. The correction value obtained by performing this fine adjustment is additionally stored in the list together with the set value. The settings to be made include the paper feed chuck position a of the paper feed section 1 for the basic paper width, the compensator position b of the web path section 6, the turn bar position c, the triangular plate d position (side lay), etc., and the folding machine 7. In this case, there are a chopper side layer, a vertical perforation side layer (both not shown), other paper cut sensor switching, edge guide sensor position, etc., and these are determined by a calculation formula when the paper width is determined.

Based on the following basic conditions such as ream paper quality, printing speed, etc., the draw values for each part of each device to make the web tension appropriate are calculated using an empirical formula. The peripheral speed ratio of the drag roller driven by the line shaft to the peripheral speed of the printing cylinder is determined via a continuously variable transmission such as the web path 6 or the like.

[0014] Also, depending on the folding specifications of the basic conditions, the necessity of air for the triangular plate d (0N/OFF), the chopper timing (
When performing a right-angle fold), many parts are set according to basic conditions, such as ON/OFF of the tipper (necessity of right-angle folding), ON/OFF of the vertical sewing machine, and the side sewing machine. Note that the measured value is for checking the correction value, and the setting is based on the correction value, but the measured value can also be used.

[0015]

[Effects of the Invention] According to the method for automatically setting printing conditions for a printing press according to the present invention, setting values are determined by calculation based on the basic conditions of many printed items in the past, and the parts set with these setting values can be fine-tuned on the actual machine. The correction values obtained through adjustment and the measured values measured by operating the rotary press using these correction values are stored in a list in a database, so the basic conditions determined by the print items for the next job are based on these values. In most cases, the basic conditions of one of the printed items in the list are met. Therefore, you can search for this print item, pick it up from the list, and use the correction value or measured value of this print item as the setting value for the next print item to set the part, and there is no need for fine adjustment. There aren't many.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an automatic printing condition setting system according to the present invention.

FIG. 2 is an example of a list of each part used in the present invention.

FIG. 3 is a flowchart of a procedure according to the invention.

FIG. 4 is a plan view of a blanket-to-blanket type offset rotary printing press.

FIG. 5 is a side view of FIG. 4;

[Explanation of symbols]

11 Console cpu computer

Claims (1)

[Claims] Claim 1: A system that automatically sets the position of each part of each device constituting a rotary printing press, selection of parts to be used, and adjustment of paper tension, etc. according to basic conditions determined by the printing item. Based on the basic conditions, calculation formulas determined from the design of the rotary press and set values calculated empirically, each part of each device of the rotary press is automatically set using these determined values, and then fine-tuned using the actual machine. The correction values obtained through this process and the measured values measured by the sensor during operation of the rotary press are stored in a database as a list for a large number of printing items, along with the printing items and their basic conditions, and are stored in a database for the next job. A method for automatically setting printing conditions for a printing press, characterized in that the optimal setting values that match the basic conditions of the printing item are searched from the list and set as the setting values for the printing item for the next job.