JP7109392B2 - Control device and method for printing machine and printing machine - Google Patents

Description

The present invention relates to a printing press control device and method, and a printing press to which the printing press control device is applied.

For example, a newspaper offset rotary press consists of a feeder, a printer, a web path, and a folder. Before starting printing, a newspaper offset rotary printing press performs a paper threading operation in which the leading edge of a web drawn out from a roll of paper supported by a paper feeding device is guided through a printing device and a web path device to a folding machine. After the paper threading operation is completed, the printing apparatus next moves the plate cylinder or blanket cylinder to a predetermined position relative to the web, and operates the ink supply device and the dampening device.

Techniques for controlling a printing press before starting printing are disclosed, for example, in the following patent documents. The offset rotary press disclosed in Patent Document 1 first presses the water roller and the ink roller against the plate cylinder, and then presses the water roller and the ink roller against the plate cylinder at a predetermined timing. The plate cylinder is pressed against the blanket cylinder.

JP-A-2001-287343

By the way, the web is not sufficiently tensioned immediately after the paper threading operation is performed on the printing press. There is a problem that an unreasonable stress acts on and breaks. On the other hand, after the web is threaded, the rotation speed of the printing press is increased to secure sufficient tension on the web, and then the blanket cylinder is attached to the web. Therefore, there is a problem that a large amount of wasted paper is generated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control apparatus and method for a printing press and a printing press for improving workability in preparation for printing.

In order to achieve the above object, the control apparatus for a printing press of the present invention comprises a printing cylinder having a printing plate mounted on its outer peripheral surface, a blanket cylinder in contact with the printing cylinder, and an ink supply for supplying ink to the printing cylinder. A printing machine comprising a supply device and a dampening device for supplying dampening water to the plate cylinder, wherein the plate cylinder and the blanket cylinder are driven to rotate, and the rotation speed of the blanket cylinder is within the range of 18 rpm to 50 rpm. When reached, the process of moving the blanket cylinder to the printing position in contact with the web, the process of activating the dampening system, and the process of activating the ink supply system are initiated.

Therefore, when the rotation speed of the blanket cylinder reaches the range of 18 rpm to 50 rpm, the process of moving the blanket cylinder to the printing position where it contacts the web, the process of activating the dampening device, and the process of activating the ink supply device are started. Therefore, the three processes can be performed from the low rotation speed region of the blanket cylinder, and the workability in the print preparation work can be improved.

In the control device for the printing press of the present invention, a folding machine is provided for horizontally cutting the printed web to a predetermined length and then horizontally folding it to form a signature, and the rotation speed of the blanket cylinder is 18 rpm to 50 rpm. Before reaching the range of, while increasing the rotation speed of the blanket cylinder, the phase of the motor that drives and rotates the plate cylinder and the blanket cylinder is aligned with the phase of the motor that drives the folding machine It is characterized by performing synchronous control.

Therefore, during acceleration operation of the printing press, position synchronization control is performed to match the phase of the motor that drives and rotates the plate cylinder and the blanket cylinder with the phase of the motor that drives the folding machine. can be suppressed.

In the control device for the printing press of the present invention, when the tension of the web reaches a preset proper tension, the rotation speed of the blanket cylinder is increased, and when the rotation speed of the blanket cylinder reaches a range of 18 rpm to 50 rpm, , the process of moving the blanket cylinder to the printing position where it contacts the web, the process of activating the dampening system, and the process of activating the ink supply system.

Therefore, when the web tension reaches the proper tension, the rotation speed of the blanket cylinder is increased, and when the rotation speed of the blanket cylinder reaches the range of 18 rpm to 50 rpm, the blanket cylinder is moved to the printing position where it contacts the web. Since the process of activating the dampening device and the process of activating the ink supply device are started, the blanket cylinder is brought into contact with the web while the tension of the web is maintained at an appropriate tension, thereby suppressing breakage of the web. be able to.

In the control device for the printing press of the present invention, the rotation speed of the blanket cylinder is set to a constant speed in the range of 7 rpm to 10 rpm to execute the web threading operation, and the web tension adjustment operation is executed. The rotation speed of the blanket cylinder is increased when the tension reaches the proper tension.

Therefore, the rotation speed of the blanket cylinder is set to a constant speed in the range of 7 rpm to 10 rpm, and the web threading operation is performed, and the web tension adjustment operation is performed. The increased speed facilitates web threading and tensioning operations.

In the control device for the printing press of the present invention, the roller is arranged on the upstream side in the web conveying direction of the blanket cylinder relative to the rotational speed of the downstream drive roller arranged on the downstream side of the web conveying direction from the blanket cylinder. When the tension of the web reaches the appropriate tension, the rotation speed of the upstream drive roller is controlled so that the appropriate tension is maintained.

Therefore, the rotation speed of the upstream drive roller is made lower than the rotation speed of the downstream drive roller with respect to the blanket cylinder. can be done.

In the control device for the printing press of the present invention, after the completion of the process of moving the blanket cylinder to the printing position where the blanket cylinder is in contact with the web, the process of operating the ink supply device, and the process of operating the dampening device, the blanket cylinder is When the rotation speed is 250 rpm or less, the rotation speed of the blanket cylinder is set to a constant rotation speed, and the paper surface inspection of the web is performed.

Therefore, when the rotation speed of the blanket cylinder is 250 rpm or less, the web surface inspection is performed with the rotation speed of the blanket cylinder set to a constant rotation speed. , the occurrence of wasted paper can be suppressed.

In the control device for a printing press of the present invention, the circumference of the blanket cylinder is an integral multiple of the circumference of the plate cylinder, and the blanket cylinder and the plate cylinder are driven and rotated by a common drive device. and

Therefore, the blanket cylinder can be brought into contact with the web at a low rotation speed, shortening the print preparation work time and suppressing the occurrence of wasted paper.

A printing press control method of the present invention includes a plate cylinder having a printing plate mounted on its outer peripheral surface, a blanket cylinder in contact with the plate cylinder, an ink supply device for supplying ink to the plate cylinder, and the plate. a dampening device that supplies dampening water to a cylinder, wherein the plate cylinder and the blanket cylinder are driven to rotate, and when the rotation speed of the blanket cylinder reaches a range of 18 rpm to 50 rpm, the blanket cylinder to a printing position where it contacts the web, activating the dampening unit, and activating the inking unit.

Therefore, the process of moving the blanket cylinder to the printing position where it contacts the web, the process of activating the dampening device, and the process of activating the inking device can be performed from the low rotation speed region of the blanket cylinder, and the printing preparation work can be performed. Workability can be improved.

Further, the printing press of the present invention includes a paper feeding device for feeding a web, a printing device for printing on the web fed from the paper feeding device, and a web printed by the printing device. It is characterized by comprising a folding device for forming a predetermined signature by cutting after vertical folding, and a control device for the printing press.

Therefore, in preparation for printing, the blanket cylinder is moved to the printing position where it contacts the web, the dampening device is activated, and the ink supply device is activated. can be carried out from a low rotational speed region, and workability in printing preparation work can be improved.

According to the control device and method for a printing press and the printing press of the present invention, it is possible to improve workability in printing preparation work.

FIG. 1 is a schematic configuration diagram showing a control device for a printing press according to this embodiment. FIG. 2 is a flow chart representing a method of controlling the printing press. FIG. 3 is a time chart showing the control method of the printing press. FIG. 4 is a schematic configuration diagram showing a newspaper offset rotary printing press. FIG. 5 is a schematic configuration diagram showing a printing unit in an offset rotary printing press for newspapers.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a printing press control apparatus and method and a printing press according to the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the present invention is not limited by this embodiment, and when there are a plurality of embodiments, it also includes a combination of each embodiment.

FIG. 4 is a schematic configuration diagram showing a newspaper offset rotary printing press.

As shown in FIG. 4, the printing press of this embodiment is a newspaper offset rotary printing press 10, which includes a paper feeding device R, an infeed device I, a printing device U, a web path device D, and a folding device. Machine F. The sheet feeding device R has a plurality of (seven in this embodiment) sheet feeding units R1 to R7, and the infeed device I has a plurality of (seven in this embodiment) infeed units I1 to I7. , the printing device U has a plurality (six units in this embodiment) of printing units U1 to U6, and the web path device D has a plurality (two units in this embodiment) of web path units D1 , D2, and the folding machine F has a plurality of (two in this embodiment) folding units F1 and F2.

Although six printing units U1 to U6 have been described, each of the printing units U1 to U6 is capable of four-color printing, and can be divided vertically into twelve printing units U11, U12, U21 . . . U61, U62 can be used. Also, although the two folding units F1 and F2 are arranged vertically, they are actually the operating side folding unit F1 and the drive side folding unit F2 arranged side by side in the direction orthogonal to the plane of the drawing. Furthermore, although the printing apparatus U has been described from two parts, it is only described as being divided into two parts for functional reasons, and in reality it is one apparatus.

In the paper feeding device R, the paper feeding units R1 to R7 have substantially the same configuration and have holding arms for holding three rolls of paper on which the web W is rolled. , the web can be rotated to the feed position. In the infeed device I, the infeed units I1 to I7 have substantially the same configuration. To stably maintain the tension of W at an appropriate value. The tension of the web W from the sheet feeding device R to the infeed device I is performed by a brake device (not shown) provided in the sheet feeding units R1 to R7.

In the printing apparatus U, the printing units U1 to U6 are multi-color printing units capable of performing two-sided four-color printing. However, each of the printing units U1 to U6 can be divided into upper and lower printing units U11 to U62 capable of double-sided two-color printing. The printing units U11 to U62 have substantially the same configuration and have ink supply devices, plate cylinders, blanket cylinders, and the like. The printing units U1 to U6 are 4×1 rotary presses in which the peripheral length (diameter) of the blanket cylinder is set to be twice (integer multiple) the peripheral length (diameter) of the plate cylinder. This 4×1 rotary press is a rotary press whose plate cylinder size is 4 pages wide by 1 page perimeter. The entire printing press has a compact structure. Therefore, the paper path length is short, and the response to control related to tension adjustment is quick. In the 4×1 rotary printing press, the plate cylinder rotates twice for one rotation of the blanket cylinder. faster than

In the web path device D, the web path unit D1 is provided for the printing units U1-U3, and the web path unit D2 is provided for the printing units U4-U6. The web pass units D1 and D2 have substantially the same configuration, and serve as a slitter for cutting the web W in the longitudinal direction (conveying direction of the web W) at the central portion in the width direction, and a conveying path for the longitudinally cut web W. It has a turn bar for setting, a compensator for adjusting the conveying position of the web W in the vertical and longitudinal directions, and the like.

Each web W printed by the printing units U1 to U3 is vertically cut by the slitter in the web pass unit D1, the conveying path is changed by the turn bar, and the conveying position is adjusted by the compensator. superimposed. Each web W printed by the printing units U4 to U6 is longitudinally cut by the slitter in the web pass unit D2, the conveying path is changed by the turn bar, and the conveying position is adjusted by the compensator. superimposed in order.

In the folding machine F, two folding units F1 and F2 are arranged on the operating side and the driving side. When a plurality of webs W1 are superimposed and introduced from the web path unit D1, the folding unit F1 vertically folds the web W1, cuts it horizontally to a predetermined length, folds it horizontally to form a signature, and output as Further, when a plurality of webs W2 are superimposed and introduced from the web path unit D2, the folding unit F2 vertically folds the webs W2, horizontally cuts them to a predetermined length, and horizontally folds them to form signatures. , as a newspaper.

Here, the printing unit U1 in the printing apparatus U will be described in detail. FIG. 5 is a schematic configuration diagram showing a printing unit in an offset rotary printing press for newspapers.

The printing unit U1, as shown in FIG. 5, is an H-shaped tower unit so as to enable four-color printing. In the printing unit U1, four stacks 21, 22, 23, and 24 of black, indigo, magenta, and yellow are arranged along the transport direction of the web W (the direction from the bottom to the top in FIG. 5). The stacks 21, 22, 23, and 24 each have a symmetrical roller arrangement.

The stacks 21, 22, 23, and 24 are laterally opposed to each other, and the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b can be in contact with each other across the conveying path of the web W. , 31b, 32a, 32b, 33a, 33b, 34a, and 34b are in contact with the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b. The stacks 21, 22, 23, 24 are provided with ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b for plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b. be provided. Dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a and 64b are provided for the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a and 44b.

In the newspaper offset rotary printing press 10 of the present embodiment configured as described above, as printing preparation work before starting the printing operation, web threading work, tension adjustment work of the web W, each operation in the printing apparatus U Position control for matching the phase of the drive motor with the phase of each drive motor in the folding machine F, blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, operation adjustment work of the ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b, dampening devices 61a, 61b, 62a, 62b, 63a, 63b, There is operation adjustment work of 64a and 64b.

FIG. 1 is a schematic configuration diagram showing a control device for a printing press according to this embodiment.

As shown in FIG. 1, the paper feeding device R has a holding arm 101 that holds a plurality of (for example, three) paper rolls WR. The web W drawn out from the paper roll WR is fed to the infeed device I via guide rollers 102 , floating rollers 103 , guide rollers 104 , tension pickup rollers 105 and guide rollers 106 . The holding arm 101 is provided with a brake device 107 that brakes the web W unwound from the paper roll WR.

The infeed device I receives the web W supplied from the paper feeding device R and feeds it to the printing device U via the guide roller 108 , the infeed drag roller 109 , the paper pressure roller 110 and the tension pickup roller 111 . The in-feed drag roller 109 can be driven and rotated by a drive motor 112 .

As described above, the printing apparatus U has blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b and plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b. Double-sided printing is performed on the web W supplied from the feed device I. FIG. The blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are independently driven by drive motors 113, 114, 115, 116. It is drive rotatable. The printed web W is sent to the web path device D via the tension pickup roller 117 , exit drag roller 118 , paper pressure roller 119 and guide roller 120 . The exit drag roller 118 can be driven and rotated by a drive motor 121 .

The web path device D cuts the web W supplied from the printing device U at the center in the width direction by the slitter knife 122 and the slitter drag roller 123, changes the transport path by the turn bar, and adjusts the transport position by the compensator. be done. The slitter drag roller 123 can be driven and rotated by a drive motor 124 . Thereafter, the web W is sent to the folding machine F via intermediate drag rollers 125 and 126, paper pressure rollers 127 and 128, tension pickup rollers 129 and 130, triangular plate drag roller 131 and paper pressure roller 132. The intermediate drag rollers 125 and 126 can be driven to rotate by a drive motor 133 , and the triangular plate drag roller 131 can be driven to rotate by a drive motor 134 . Note that the paper pressing rollers 127 and 128 may not be provided for the intermediate drag rollers 125 and 126 .

The control device 140 can adjust the delivery speed of the web W from the paper roll WR by controlling the brake device 107 . In addition, the control device 140 controls the drive motors 112, 113, 114, 115, 116, 121, 124, 133, 134 so that the infeed drag roller 109, blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, exit drag roller 118, slitter drag roller 123, intermediate drag rollers 125, 126, and triangular plate drag roller 131 can be controlled. can. Furthermore, the controller 140 receives detection values from the tension pickup rollers 105 , 111 , 117 , 129 and 130 .

The control device for the printing press according to this embodiment will be described in detail below. The control device of the printing press of this embodiment drives and rotates the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b. , blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b reach a range of 18 rpm to 50 rpm, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b are turned into webs. A process of moving to the printing position to contact W, a process of operating the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b, and the ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a. , 54b.

Further, when the tension of the web W reaches a preset proper tension, the control device of the printing press of the present embodiment increases the rotation speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b. Then, when the rotational speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b reaches the range of 18 rpm to 50 rpm, the above three processes are started.

At this time, the rotation speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b is set to a constant speed in the range of 7 rpm to 10 rpm, and the paper threading work of the web W is performed, and the tension adjustment work of the web W is performed. is executed, and when the tension of the web W reaches the proper tension, the rotation speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b is increased.

In addition, from the rotational speed of the downstream drive roller (outlet drag roller 118) arranged downstream in the conveying direction of the web W from the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, the blanket cylinders 31a, 31b, 32b, 34a, 34b 31b, 32a, 32b, 33a, 33b, 34a, and 34b, the rotational speed of the upstream driving roller (infeed drag roller 109) arranged upstream in the conveying direction of the web W is set to a low speed, and the tension of the web W is appropriate. When the tension is reached, the rotational speed of the upstream drive roller (infeed drag roller 109) is controlled so that the proper tension is maintained.

Then, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b are moved to the printing position where they are brought into contact with the web W. After completion of the process of operating the ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b, the rotation of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b When the speed is 250 rpm or less, the number of revolutions of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b is set to a constant number of revolutions, and the paper surface inspection of the web W is executed.

Here, a method for controlling the printing press by the control device for the printing press according to the present embodiment will be specifically described. FIG. 2 is a flow chart showing the control method of the printing press, and FIG. 3 is a time chart showing the control method of the printing press.

As shown in FIGS. 1 and 2, in the print preparation work by the control device of the printing press of the present embodiment, when the print preparation work is started, the printing unit U1 has the blanket cylinders 31a, 31b, 32a, 32b, 33a, and 33b. , 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are separated from each other, and the outer peripheral surfaces of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b are exposed to the web W. It is in a state of being uncovered, separated from the front and back.

In step S11, the control device 140 controls the drive motors 112, 113, 114, 115, 116, 121, 124, 133, and 134 so that the in-feed drag roller 109 and the blanket cylinders 31a, 31b, 32a, and 32b are driven. , 33a, 33b, 34a, 34b, plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, outlet drag roller 118, slitter drag roller 123, intermediate drag rollers 125, 126, triangular plate drag roller 131 are rotationally driven. In step S12, the control device 140 determines whether or not the rotation speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have reached a predetermined rotation speed N1 (7 rpm to 10 rpm).

Here, if it is determined (No) that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have not reached the predetermined rotational speed N1, this state is maintained. On the other hand, if it is determined (Yes) that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have reached the predetermined rotational speed N1, in step S13, the blanket cylinders 31a, 31b, The rotation speeds of 32a, 32b, 33a, 33b, 34a, and 34b are maintained at a predetermined rotation speed N1. In this state, the operation of threading the web W is performed in step S14, and the tension adjustment operation of the web W is performed in step S15.

In the tension adjustment work of the web W, the control device 140 controls the rotation speed of the exit drag roller 118 arranged downstream of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b in the conveying direction of the web W. Therefore, the rotation speed of the in-feed drag roller 109 arranged on the upstream side in the conveying direction of the web W from the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b is reduced. Then, the slackness of the web W is eliminated in the section between the infeed drag roller 109 and the exit drag roller 118, and tension is generated in the web W. In step S16, the control device 140 determines whether or not the tension of the web W has reached a preset proper tension T1. Here, if it is determined (No) that the tension of the web W has not reached the proper tension T1, this state is maintained. On the other hand, when it is determined that the tension of the web W has reached the proper tension T1 (Yes), the in-feed drag roller 109 is controlled so that the proper tension T1 is maintained.

Here, the control device 140 makes determinations based on the detection results of the tension pickup rollers 111 and 117 . In this case, the detection result of the tension pickup roller 117 on the downstream side of the printing unit U1 may be used, or the detection result of the tension pickup roller 111 on the upstream side of the printing unit U1 may be used. Also, the detection results of both tension pickup rollers 111 and 117 may be used.

When the tension adjustment work of the web W is completed, in step S17, the control device 140 controls the drive motors 112, 113, 114, 115, 116, 121, 124, 133, 134 so that the infeed drag roller 109 is , blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, outlet drag roller 118, slitter drag roller 123, intermediate drag roller 125, 126, the triangular plate drag roller 131 is controlled to accelerate.

During this acceleration operation, position synchronization control is performed to match the phases of the driving motor 134 of the folding unit F1 and the driving motors 113, 114, 115, and 116 of the printing unit U1. In position synchronization control (phase matching of the drive motors), the control device 140 controls the positions of the drive motors 113, 114, 115, and 116 of the printing unit U1 based on the position data when the drive motor 134 of the folding unit F1 is stopped. control. Specifically, the driving motor 134 of the folding unit F1 and the driving motors 113, 114, 115, and 116 of the printing unit U1 are each provided with a master station (not shown) for controlling the motors, and the driving motor 134 is stopped before starting operation. Virtual master axis data is calculated based on the position data, and the virtual master axis data is sent to the master stations of the drive motors 113, 114, 115, and 116 to control the positions of the drive motors 113, 114, 115, and 116. No time is required to control the position of the drive motor of the folding unit F1, which serves as a reference. can be suppressed. In step S18, the control device 140 determines whether or not the rotation speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have reached a predetermined rotation speed N2 (18 rpm to 50 rpm).

Here, if it is determined (No) that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have not reached the predetermined rotational speed N2, this state is maintained. On the other hand, if it is determined (Yes) that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have reached the predetermined rotational speed N2, in step S19, the blanket cylinders 31a, 31b, A process (throw-in process) of moving the webs 32a, 32b, 33a, 33b, 34a, and 34b to the printing position where they are brought into contact with the web W is started. Subsequently, in step S20, the process of operating the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b is started. Then, in step S21, the process of operating the ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b is started.

Note that the processing of steps S19 to S21 is not limited to this order. For example, the operation of dampening units 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b; the operation of ink supply units 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b; The order of the process (throw-in process) of moving the web W to the printing position where the web W is brought into contact with the 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b may be used.

The process of moving the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b to the printing position where they are brought into contact with the web W (throw-in process) means that the blanket cylinders 31a, 31b, 32a, 32b, and 33a , 33b, 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are brought into contact with each other. , 32b, 33b, and 34b are brought into contact with each other with the web W interposed therebetween. The process of operating the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b means that a plurality of dampening rollers are applied to the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b. This is a process of bringing them into contact with each other and supplying dampening water. Further, the process of operating the ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b means that the plurality of ink forming rollers 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are operated. It is a process of bringing the ink into contact with the ink and supplying the ink.

At step S22, these three processes are finished, and the control device 140 controls the rotation speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b to reach a predetermined rotation speed N3 (for example, 100 rpm to 250 rpm). range) is reached. Here, if it is determined (No) that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have not reached the predetermined rotational speed N3, this state is maintained. On the other hand, if it is determined (Yes) that the number of revolutions of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b has reached the predetermined number of revolutions N3, in step S23, the blanket cylinders 31a, 31b, The rotation speeds of 32a, 32b, 33a, 33b, 34a, and 34b are maintained at a predetermined rotation speed N3.

Then, in step S24, the number of rotations of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b is maintained at a constant number of rotations (predetermined number of rotations N3), and the paper surface inspection of the web W is performed. Run. That is, it is confirmed whether the pattern of the web W is in a proper state, and if necessary, in step S25, the amount of dampening water supplied by the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b is changed. to adjust the amount of ink supplied by the ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b.

When the dampening water supply amount and the ink supply amount are adjusted, in step S26, the control device 140 controls the drive motors 112, 113, 114, 115, 116, 121, 124, 133, and 134 to Infeed drag roller 109, blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, outlet drag roller 118, slitter drag roller 123 , the intermediate drag rollers 125 and 126, and the triangular plate drag roller 131 are controlled to accelerate. Then, in step S27, the control device 140 starts printing, and in step S28, the rotation speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b reaches a predetermined rotation speed N4 (500 rpm to 750 rpm) is reached.

Here, if it is determined (No) that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have not reached the predetermined rotational speed N4, this state is maintained. On the other hand, if it is determined (Yes) that the number of revolutions of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b has reached the predetermined number of revolutions N4, in step S29, the blanket cylinders 31a, 31b, The rotation speeds of 32a, 32b, 33a, 33b, 34a, and 34b are maintained at a predetermined rotation speed N4.

Also, the above-described print preparation work will be described in chronological order. As shown in FIGS. 1 and 3, at time t1, controller 140 controls drive motors 112, 113, 114, 115, 116, 121, 124, 133, and 134 to cause infeed drag roller 109 to , blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, outlet drag roller 118, slitter drag roller 123, intermediate drag roller 125, 126, to rotate the triangular plate drag roller 131; At time t2, when the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b reach the predetermined rotational speed N1, they are maintained at the predetermined rotational speed N1. In this state, the operation of threading the web W is performed in step S14, and the tension adjustment operation of the web W is performed in step S15.

At time t3, when the tension of the web W reaches the proper tension T1, the proper tension T1 is maintained, and the control device 140 controls the drive motors 112, 113, 114, 115, 116, 121, 124, 133, 134. Infeed drag roller 109, blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, outlet drag roller 118, The slitter drag roller 123, the intermediate drag rollers 125 and 126, and the triangular plate drag roller 131 are controlled to accelerate. During this acceleration operation, position synchronization control is also performed to match the phases of the driving motor 134 of the folding unit F1 and the driving motors 113, 114, 115, and 116 of the printing unit U1. At time t4, when the rotational speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b reaches a predetermined rotational speed N2, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, A process of moving 34a, 34b to the printing position to contact the web W (throw-in process), a process of operating the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b, and the ink supply devices 51a, 51b. , 52a, 52b, 53a, 53b, 54a and 54b are operated in order.

Then, at time t5, when these three processes are finished and the number of rotations of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b reaches a predetermined number of rotations N3, the surface of the web W is inspected. , dampening water supply rate adjustment work, and ink supply rate adjustment. After that, at time t6, the control device 140 controls the drive motors 112, 113, 114, 115, 116, 121, 124, 133, 134 so that the infeed drag roller 109, blanket cylinders 31a, 31b, 32a , 32b, 33a, 33b, 34a, 34b, plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, exit drag roller 118, slitter drag roller 123, intermediate drag rollers 125, 126, triangular plate drag roller 131. Accelerate driving. At time t7, when the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b reach the predetermined rotational speed N4, the predetermined rotational speed N4 is maintained.

At time T8, when the printing job is completed, the control device 140 controls the drive motors 112, 113, 114, 115, 116, 121, 124, 133, and 134 so that the in-feed drag roller 109, blanket Cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, outlet drag roller 118, slitter drag roller 123, intermediate drag rollers 125, 126, The triangular plate drag roller 131 is controlled to perform deceleration operation. At this time, when the rotational speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b reaches a predetermined rotational speed N5 (200 rpm), the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b, the ink feeders 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b to the web. A process of moving to a standby position to separate from W (throwing process) is performed. At time T9, the controller 140 sets the rotation speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b to a predetermined rotation speed N1 (7 rpm), and finishes printing at time T10. do.

Thus, in the control device for the printing press of this embodiment, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, Newspaper offset rotary press comprising 44a, 44b, ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b and dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b In the printing press 10, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are driven to rotate, and the blanket cylinders 31a, 31b , 32a, 32b, 33a, 33b, 34a, and 34b reach a range of 18 rpm to 50 rpm, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b are brought into contact with the web W at the printing position. , activating the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b, activating the ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b to start.

Therefore, when the rotational speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b reaches the range of 18 rpm to 50 rpm, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b A process of moving to the printing position to contact the web W, a process of operating the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b, the ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, Since the process of actuating 54a, 54b is initiated, the three processes can be performed from the low rpm range of blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b to reduce waste. It is possible to improve workability in print preparation work.

In the control device for the printing press of this embodiment, a folding machine F is provided for horizontally cutting the printed web W to a predetermined length and then horizontally folding it to form signatures. While increasing the rotation speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b before the rotation speed of the blanket cylinders 32b, 33a, 33b, 34a, 34b reaches the range of 18 rpm to 50 rpm, the plate Phases of drive motors 113, 114, 115, and 116 that drive and rotate the cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b and the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b , position synchronization control for synchronizing the phase with the drive motor for driving the folding machine F is performed. Therefore, the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b and the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b are driven to rotate during the acceleration operation of the printing apparatus U. Since position synchronization control is performed to match the phases of the drive motors 113, 114, 115, and 116 with the phase of the drive motor 134 that drives the folding machine F, the occurrence of wasted paper can be suppressed.

In the control device of the printing press of this embodiment, when the tension of the web W reaches a preset proper tension, the rotation speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b is increased, When the number of revolutions of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b reaches the range of 18 rpm to 50 rpm, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b are moved to the web W , actuating the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b, the ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b is initiated. Therefore, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b are brought into contact with the web W while the tension of the web W is maintained at an appropriate tension, thereby suppressing breakage of the web W. can be done.

In the control device of the printing press of this embodiment, the rotation speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b is set to a constant speed in the range of 7 rpm to 10 rpm, and the web W is threaded. At the same time, the tension adjustment work of the web W is performed, and when the tension of the web W reaches the proper tension, the rotation speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b is increased. Therefore, the operation of threading the web W and the operation of adjusting the tension can be performed smoothly.

In the control device of the printing press of this embodiment, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b are arranged downstream in the conveying direction of the web W from the rotational speed of the outlet drag roller 118. The rotation speed of the in-feed drag roller 109 arranged upstream in the conveying direction of the web W from the cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b is reduced, and the tension of the web W reaches the proper tension. Then, the rotational speed of the in-feed drag roller 109 is controlled so that the proper tension is maintained. Therefore, the work for adjusting the tension of the web W can be performed early.

In the control device of the printing press of the present embodiment, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b are moved to the printing position where they are brought into contact with the web W, the ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b, after completion of the operation of dampening units 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b, blanket cylinders 31a, 31b, 32a, 32b, When the rotation speed of the blanket cylinders 31a, 33b, 34a, and 34b is 250 rpm or less, the rotation speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b is set to a constant rotation speed, and the paper surface inspection of the web W is performed. do. Therefore, by performing the paper surface inspection of the web W in the low rotation region of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, it is possible to suppress the occurrence of wasted paper.

In the control device for the printing press of this embodiment, the circumferences of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b are set to those of the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b. The blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are driven by common drive motors 113, 114. , 115 and 116 are driven to rotate. Therefore, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b can be brought into contact with the web W at a low rotation speed, thereby shortening the print preparation work time and suppressing the occurrence of wasted paper. . In addition, since the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b make two or more revolutions for one revolution of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b, the ink Since the time for the or water to spread (surface leveling) to the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b is shorter than before, the web W can be brought into contact with the web W at an earlier stage of low rotation. It is possible to further suppress the occurrence of wasted paper.

Further, in the control method of the printing press of this embodiment, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b is driven to rotate, and when the rotational speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b reaches the range of 18 rpm to 50 rpm, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, a process of moving 34a, 34b to the printing position to contact the web W, a process of operating the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b, the ink supply devices 51a, 51b, 52a, 52b, The process of activating 53a, 53b, 54a, 54b is started. Therefore, the three processes can be performed from the low rotational speed region of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, and the workability in the print preparation work can be improved.

Further, in the printing machine of the present embodiment, the paper feeding device R for supplying the web W, the printing device U for printing on the web W supplied from the paper feeding device R, and the printing device U for printing A folding machine F for forming a predetermined signature by vertically folding the web W to which the web W has been applied is cut, and a control device. Therefore, in the printing apparatus U, the three processes can be performed from the low rotational speed region of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b, and the workability in the printing preparation work is improved. can be achieved.

In the above-described embodiment, the printing press of the present invention is applied to a newspaper offset rotary printing press, but other printing presses that use webs, such as commercial offset rotary printing presses, are described. It may be applied to a double-sided printing press or a single-sided printing press.

R paper feeding device R1 to R7 paper feeding unit I infeed device I1 to I7 infeed unit U printing device U1 to U6, U11 to U62 printing unit D web pass device D1, D2 web pass unit F folder F1, F2 folding unit 21, 22, 23, 24 Stack 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b Blanket cylinder 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b Plate cylinder 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b ink supply device 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b dampening device 101 holding arm 102 guide roller 103 floating roller 104 guide roller 105 tension pickup roller 106 guide roller 107 brake device 108 guide roller 109 in-feed drag roller 110 paper pressure roller 111 tension pickup roller 112 drive motor 113, 114, 115, 116 drive motor 117 tension pickup roller 118 exit drag roller 119 paper pressure roller 120 guide roller 121 drive motor 122 slitter knife 123 slitter Drag roller 124 Drive motor 125, 126 Intermediate drag roller 127, 128 Paper pressure roller 129, 130 Tension pickup roller 131 Triangular plate drag roller 132 Paper pressure roller 133 Drive motor 134 Drive motor 140 Control device WR Rolled paper W Web

Claims (6)

a plate cylinder having a printing plate mounted on its outer peripheral surface;
a blanket cylinder in contact with the plate cylinder;
an ink supply device that supplies ink to the plate cylinder;
a dampening device that supplies dampening water to the plate cylinder;
a folding machine that laterally cuts the printed web to a predetermined length and then laterally folds it to form a signature;
In a newspaper offset rotary printing press that prints on a plurality of webs comprising :
driving and rotating the plate cylinder and the blanket cylinder;
The number of rotations of the blanket cylinder is set to a constant speed in the range of 7 rpm to 10 rpm, and the plurality of webs are threaded, and the plurality of web tension adjustment operations are performed, and the tension of the plurality of webs is set in advance. when the appropriate tension is reached, increasing the rotation speed of the blanket cylinder,
Before the rotational speed of the blanket cylinder reaches the range of 18 rpm to 50 rpm, while increasing the rotational speed of the blanket cylinder, the phase of the motor that drives and rotates the plate cylinder and the blanket cylinder and the folding machine is driven. Position synchronization control is performed to match the phase with the motor that
When the rotation speed of the blanket cylinder reaches a range of 18 rpm to 50 rpm, the process of moving the blanket cylinder to the printing position where it contacts the web, the process of operating the dampening device, and the process of operating the ink supply device are started. do,
A control device for a printing press characterized by: making the rotational speed of the upstream driving roller arranged upstream of the blanket cylinder in the web conveying direction lower than the rotational speed of the downstream driving roller arranged downstream of the blanket cylinder in the web conveying direction; and when the web tension reaches the proper tension, the rotational speed of the upstream drive roller is controlled so that the proper tension is maintained. . After completion of the process of moving the blanket cylinder to the printing position where the blanket cylinder contacts the web, the process of operating the ink supply device, and the process of operating the dampening device, when the number of rotations of the blanket cylinder is 250 rpm or less, the 3. The control device for a printing press according to claim 1, wherein the rotation speed of the blanket cylinder is set to a constant rotation speed, and the paper surface inspection of the web is executed. 4. The blanket cylinder has a circumferential length that is an integral multiple of the circumferential length of the plate cylinder, and the blanket cylinder and the plate cylinder are driven to rotate by a common driving device. A control device for a printing press according to any one of the preceding claims. a plate cylinder having a printing plate mounted on its outer peripheral surface;
a blanket cylinder in contact with the plate cylinder;
an ink supply device that supplies ink to the plate cylinder;
a dampening device that supplies dampening water to the plate cylinder;
a folding machine that laterally cuts the printed web to a predetermined length and then laterally folds it to form a signature;
In a newspaper offset rotary press that prints on a plurality of webs comprising :
driving and rotating the plate cylinder and the blanket cylinder;
The number of rotations of the blanket cylinder is set to a constant speed in the range of 7 rpm to 10 rpm, and the plurality of webs are threaded, and the plurality of web tension adjustment operations are performed, and the tension of the plurality of webs is set in advance. when the appropriate tension is reached, increasing the rotation speed of the blanket cylinder,
Before the rotational speed of the blanket cylinder reaches the range of 18 rpm to 50 rpm, while increasing the rotational speed of the blanket cylinder, the phase of the motor that drives and rotates the plate cylinder and the blanket cylinder and the folding machine is driven. Position synchronization control is performed to match the phase with the motor that
When the rotation speed of the blanket cylinder reaches a range of 18 rpm to 50 rpm, the process of moving the blanket cylinder to the printing position where it contacts the web, the process of operating the dampening device, and the process of operating the ink supply device are started. do,
A printing press control method characterized by: a feeder for feeding a web;
a printing device that prints on the web supplied from the paper feeding device;
a folding device for vertically folding the web printed by the printing device and then cutting the web to form a predetermined signature;
A control device for a printing press according to any one of claims 1 to 4 ;
A printing press comprising:

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