JP5009587B2 - Cutting position registration adjusting method and printing press - Google Patents

Description

  The present invention relates to a cutting position register adjusting method and a printing press using the same.

  In general, a multi-color printing machine includes a paper feeding device that supplies a web, an infeed device that applies an appropriate tension to the web, a printing device, a web after printing to a folding machine, It is configured by a web transport device that performs stacking, flow direction printing position alignment, and the like, and a folding machine that cuts and folds the web and carries it out as a signature. In such a printing machine, it is cut into a predetermined web length by the folding machine corresponding to the pattern position of the printed matter printed by the printing apparatus, and becomes a folded book. The cutting position is adjusted and controlled to an appropriate position by moving the position of a compensator roller provided in the web conveyance device by an electric motor or other actuator (for example, see Patent Document 1). Since the position of the compensator roller is checked and adjusted after printing on the web starts, if the initial preset position deviates significantly from the appropriate value, it takes time to adjust the position, and the printed paper being adjusted is damaged. Will increase.

Therefore, when printing the same building page that has been used in the past, in order to adjust the cutting position before printing, it is preset at the pre-stored compensator roller position and fine-tuned it. It is generally done. As a result, the cutting register adjustment time is shortened, and the waste paper is reduced as much as possible.
Further, in newspaper printing, the page (that is, paper thread) of the day is the same, and the content (plate) changes with time. For this reason, the rotary press for newspapers is operated continuously only by stopping during the plate change.
JP 2004-18192 A

  However, when the operation is temporarily stopped and the printing plate is replaced and then restarted (next version), the compensator roller position is maintained when the first plate is decelerated and stopped. In this state, if the compensator roller position is preset in the same manner as the rotary printing press, the cutting position is shifted because the operating conditions are greatly different, such as the paper is more easily stretched than the first version. For this reason, if the same preset value of the compensator roller position as that of the previous time is used as it is, the deviation becomes large and time is required for the adjustment, so that the amount of damaged paper increases.

  In view of the above circumstances, it is an object of the present invention to provide a cutting position register adjusting method and a printing press that can suppress the generation of damaged paper during the next plate operation.

To achieve the above object, cutting position register adjustment method of the present invention, compensator by compensator roller in cutting position register adjustment method for a printing press for controlling the cutting register of the web, a deceleration from the printing speed operation at the end of the The cutting register position by the compensator roller is fetched and stored, and the compensator roller is preset with this cutting register position as the next cutting register position.

Further, the printing press of the present invention captures and stores the cutting register position by the compensator roller under the deceleration state at the end of the operation, which is a deceleration from the printing speed , and uses the stored cutting register position next time. A compensator roller control device that presets the cutting register position of the compensator roller during operation is provided.

  When the next operation is started after the operation is finished, the paper is more easily stretched than the previous time. For this reason, if the same preset value of the compensator roller as that of the previous time is used as it is, the deviation becomes large and the waste paper increases. In the present invention, the current value of the compensator roller at the time of the previous deceleration at which the sheet state is substantially equal to that at the next operation is fetched and used as the next preset value. Thereby, alignment of the cutting position at the time of the next plate operation is performed quickly, and it is possible to reduce waste paper at the time of start-up.

  The cutting position register adjusting method according to claim 2 is the cutting position register adjusting method according to claim 1, wherein the end of the operation is an end of the first plate operation, and the next operation is the next plate operation. It is.

  According to a fifth aspect of the present invention, in the printing press according to the fourth aspect, the end of the operation is the end of the first plate operation, and the next operation is the next plate operation.

  Since the paper state is particularly different between the first version and the next version, it is possible to effectively suppress the occurrence of damaged paper.

  The cutting position register adjusting method according to claim 3 is the cutting position register adjusting method according to claim 1 or 2, wherein the speed at the end of the operation for storing the cutting register position is a color register at the start of the next operation. It is within the speed range of 20% or more and 40% or less with respect to the color matching speed when performing the matching.

  The printing press according to claim 6 is the printing press according to claim 4 or 5, wherein the printing press performs color registration at a color matching speed at the start of operation, and the compensator roller At the end of the operation, the control device stores the cutting register position within a speed range of 20% to 40% increase in the color matching speed.

  The present inventors statistically indicate the state of the web at the time of deceleration at the end of operation (at a speed of 20% to 40% increase in the color matching speed) and the web state at the color matching speed at the next driving. I found that they were almost equal. Therefore, in the present invention, the current value of the compensator roller at the time of deceleration at the end of operation (at a speed of 20% to 40% increase in the color matching speed) is fetched and used as a preset value for the next version. As a result, the cutting position can be quickly aligned during the next plate operation, and the waste paper at the time of start-up can be reduced more effectively.

  The current value of the compensator roller at the time of the previous deceleration when the web state is almost the same as the next operation is taken in, and by using this as the next preset value, the position of the cutting position at the next plate operation is quickly adjusted, Lost paper at startup can be reduced.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the present invention is applied to a newspaper rotary press for multi-page duplex printing. FIG. 1 is a schematic diagram showing an overall schematic configuration of an offset newspaper rotary press equipped with a multi-page duplex printing / multi-color printing apparatus. In the rotary press, a plurality of paper feeding devices 1 that supply the web 7, an infeed device 2 that applies an appropriate tension to the web 7, the printing device 3, and the web 7 after printing are conveyed to the folding machine 6. At the same time, a web transport device 5 that performs superposition of the webs 7 and alignment in the flow direction printing position, a folding machine 6 that cuts and folds the web 7 and carries it out as a signature, and a rotary press control device 9 that controls the entire rotary press. And are provided.

  The paper feeding device 1 is configured to hold three webs each having a web 7 wound in a roll shape. When the paper is fed from the first web, the second web is ready for splicing and the third web is loaded. When the remaining web 7 of the first web is reduced, the web 7 is spliced to the second web 7. While the web 7 is being supplied from the second web, the first web is loaded to prepare for splicing. In this way, the web 7 is continuously fed from the paper feeding device 1 to the printing device 3.

  The printing apparatus 3 is provided with the number of units corresponding to the number of printing colors. In this embodiment, printing devices 3a to 3d are provided as the printing device 3, and the printing devices 3a and 3b are provided with four printing units on both sides of the web, printing black, indigo, red and yellow, respectively. Color printing is performed using the mixed colors. Similarly, the printing apparatuses 3c and 3d are provided with two printing units, and print black and single colors.

The schematic structure of the printing apparatus 3a will be described as a representative. Printing is performed on the web 7 by printing units of four colors of black, indigo, red, and yellow. Here, printing on the web 7 means printing on the same region on the web 7 that flows continuously. In this way, one color is formed by superimposing the respective colors on the same region, and multicolor printing relating to the one pattern is possible. On the web 7, a special mark for register adjustment of each color (hereinafter referred to as a register mark) is printed together with the original pattern in order to measure misregistration.
The registration mark is detected by detection means such as a camera (not shown) provided at the exit of each printing device 3 and processed by the rotary press control device 9.

Each printing unit constituting the printing apparatus 3a is provided with various types of rollers such as an ink roller and a plate cylinder 25, and power is supplied to these various devices by a common motor. Yes.
A driving device (not shown) for adjusting the registration of the plate cylinder 25 is provided for each color independently. Further, the plate cylinder 25 is provided with a potentiometer (not shown) for detecting the registration position of the plate cylinder 25. .
The plate cylinder position detecting means used for detecting the position of the plate cylinder 25 is not limited to a potentiometer.

Cut marks for cutting control are printed together.
The cut mark may be set as a cut mark if there is an appropriate part in the pattern.

The printing apparatuses 3b to 3d have the same configuration, and a duplicate description is omitted here.
These printing apparatuses are examples, and appropriate printing apparatuses such as a single-color printing apparatus that performs double-sided monochrome printing and a printing apparatus that performs four-color printing on one side and two-colors on the other side can be used.

  The printing device 3 performs predetermined printing on the web 7 supplied from the paper feeding device 1 and supplies the web 7 to the web conveyance device 5. The web conveyance device 5 includes a large number of turn bars 51, and is configured to change the travel route of the web 7 from the printing device 3 and change the overlapping order. The width of the web 7 is usually 4 pages of a newspaper, and in the figure, the center of the width direction after printing is cut with a slitter, and the turn bar 51 turns the width of one page on one side to the width of the other two pages. I try to overlap. In this way, the web 7 that has entered the folding machine overlaps eight sheets, and a 32-page printed matter in which eight sheets of four-page newspapers overlap on both sides of two pages in width is discharged to one side of the folding machine 6.

  The folding machine 6 superimposes a plurality of webs 7 sent from the web conveying device 5 and vertically cuts them, vertically folds them with a triangular plate, further cuts horizontally and folds, and discharges them as a desired folded book. It is configured.

  After printing, if the center in the width direction is cut with a slitter and one is not overlapped with the other, it is introduced into the folding machine 6 as it is, so that a 16-page newspaper can be discharged on both sides. In addition, there is an apparatus that can switch and deliver a web printed by the printing apparatuses 3a and 3b capable of color printing to any position, but the illustration is omitted. When the number of pages is further increased, the web 7 is introduced from the adjacent printing device, or when the number of pages is small, for example, when three printing devices 3 are used, the web printed by the same printing device 3 depending on which three are used. 7, the path to the folding machine 6 is different.

Thus, the length of the web 7 from the printing device 3 to the folding machine 6 may change depending on the operation pattern. That is, since the cutting position by the folding machine 6 changes with respect to the printing position, the rotary press of this embodiment includes a compensator roller 53 that adjusts the position. The compensator roller 53 is provided with a moving means 52 for moving it, a supporting means, and a position detecting device such as a potentiometer.
The cut mark is configured to be detected by a mark detector 54 provided in a portion that has passed the compensator roller 53.
In FIG. 1, the mark detector 54 is only shown in one place, but the mark detector 54 is provided corresponding to each web 7.
Information on the mark detector 54 and the position detection device is sent to a compensator roller control device 8 and a rotary press control device 9 which will be described later, and is used for trimming register adjustment.

  Further, a compensator roller control device 8 for controlling the position of the compensator roller 53 is provided. The compensator roller control device 8 includes an input device 81, a storage unit 82, a calculation device 83, a control device 84, and an output device 85. The printing conditions (paper threading route, web tension, operation pattern, etc.) are fetched from the rotary press control device 9 to the input device 81 and collated with the printing condition data in the storage unit 82 by the control device 84, and the corresponding preset value A is set. Then, the preset value A of the compensator roller is transmitted from the output device 85 to the rotary press control device 9, and the position of the compensator roller 53 is preset.

  Next, the operation of the rotary press will be described with reference to FIG. First, before starting printing, printing conditions are determined, an operation pattern is determined by the rotary press control device 9, and the rotary press is controlled by the rotary press control device 9 along the operation pattern.

  After the operation pattern is determined, the compensator roller controller 8 presets the compensator roller 53 to the corresponding position. More specifically, the compensator roller 53 is aligned by the moving means 52 and the position detection device. This starts operation. First, slow motion is performed (a). By the rotary press control device 9, the plate cylinder 25 of the unit corresponding to each color of the printing devices 3a to 3d is preset at the register position.

Next, the rotation speed is increased and printing is started (b). When the plate is replaced or ready for printing, the ink and water are adjusted while operating at the color matching speed (for example, 60,000 copies / hour). At the same time, the compensator roller 53 starts adjusting the cutting position of the folding machine 6 with respect to the printed pattern (c).
In the adjustment of the cutting register, the position of the compensator roller 53 is adjusted by the moving means 52 so that the phase difference between the rotation timing of the rotary press and the detection timing of the cut mark by the mark detector 54 falls within a predetermined range.
Automatic registration adjustment for color matching is started from a speed at which the detection mark on the paper is stably printed (color matching speed, for example, 60,000 copies / hour). In the automatic registration adjustment, detection marks for each color printed on the paper surface are recognized and image-processed by a camera (not shown), and the plate cylinder is aligned. The automatic registration adjustment is finished within a predetermined time from the start of the automatic registration adjustment (finished surface finishing), and acceleration of the plate cylinder 25 is started after a predetermined time from the time when the good paper is obtained (d). Then, a printing operation is performed at a printing speed, for example, 160,000 copies / hour.

  When the number of copies reaches a predetermined number, the printing operation is terminated and the rotary press is decelerated rapidly. At this stage of deceleration, the current value B of the compensator roller 53 is captured. Specifically, when the color matching speed (60,000 sheets / hour) is + 20% or more and 40% or less (for example, 80,000 sheets / hour), it is taken into the input device 81 from the rotary press controller 9 and stored in the storage unit 82. .

  After printing is completed, the position of the compensator roller 53 is preset with the current value B of the compensator roller 53 stored in the storage unit 82 as a preset value when the next plate is printed. Since the operation of the next version is the same as described above, a duplicate description is omitted.

  Further, at the end of the next version, the current value C of the compensator roller 53 at the time of deceleration is taken in and used as a preset value in the next version.

As described above, since the compensator roller 53 position at the time of relatively high speed operation during deceleration is taken in and set as the preset value of the next version, it is possible to reduce the cutting deviation range. That is, when the next edition is operated, the paper is more easily stretched than the first edition. Therefore, if the preset value A at the first edition is used as the preset value at the next edition, the deviation becomes large, and the damaged paper is Increase.
In the present embodiment, the current value of the compensator roller 53 at the time of deceleration of the first version (at a speed of +20 to 40% of the color matching speed) that is substantially equal to the color matching speed of the next version is fetched and stored in the storage unit 82. And used as a preset value for the next printing. Thereby, alignment of the cutting position at the time of the next plate operation is performed quickly, and it is possible to reduce waste paper at the time of start-up.

  Further, even when the vehicle stops from a high speed range during an emergency stop or the like, since the preset data of the compensator roller 53 of the previous time is stored in the storage unit 82, the position of the compensator roller 53 at the start of the next operation using the preset value. Can be preset, contributing to the reduction of waste paper.

1 is a schematic diagram illustrating a schematic configuration of a rotary press according to an embodiment of the present invention. It is the figure which showed the driving speed by the rotary press.

Explanation of symbols

3 Printing device 8 Compensator roller control device 9 Rotary press control device 53 Compensator roller

Claims (6)

In the cutting position registration adjustment method of the printing press that controls the cutting registration of the web by the compensator roller,
A cutting position registration adjustment method that captures and stores a cutting registration position by the compensator roller at the end of operation, which is a deceleration from a printing speed, and presets the compensator roller with the cutting registration position as a next cutting registration position.   The cutting position register adjusting method according to claim 1, wherein the end of the operation is an end of the first plate operation, and the next operation is a next plate operation.   The speed at the end of the operation for storing the cutting register position is within a speed range of 20% or more and 40% or less with respect to a color matching speed when color registration is performed at the start of the next operation. The cutting position register adjusting method according to 1 or 2. In a printing press with a compensator roller that controls the web cutting register,
The cutting register position by the compensator roller is captured and stored in the deceleration state at the end of the operation, which is a deceleration from the printing speed, and the cutting register position of the compensator roller is used in the next operation using the stored cutting register position. A printing press equipped with a compensator roller control device for presetting.   The printing press according to claim 4, wherein the end of the operation is an end of the first plate operation, and the next operation is a next plate operation.   The printing machine performs color registration at a color matching speed at the start of operation, and the compensator roller control device has a speed range of 20% to 40% increase in the color matching speed at the end of the operation. The printing press according to claim 4 or 5, wherein the cutting registration position in a printer is stored.

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