JP5584540B2 - Printing apparatus and printing method - Google Patents

Description

  The present invention relates to a printing apparatus and a printing method, and more particularly, to a printing technique in which a plate cylinder provided with a plate is rotated and printing is sequentially performed on a traveling material for each product.

  2. Description of the Related Art Conventionally, a flexographic printing machine is known that continuously prints a sheet-like material that runs continuously at regular intervals for each product. The flexographic printing press is a rotary printing press that performs printing on a material by rotating a plate cylinder provided with a printing plate and supplying ink to the printing plate. Flexographic printing machines include a center drum system, a stack system, and an inline system. In particular, an in-line flexographic printing press has a plate cylinder and an impression cylinder in one unit, and if the unit is added, the printing color can be increased, so that the printing color can be increased relatively easily. It is more effective than other methods.

  Such an in-line flexographic printing machine has two control systems, a fully synchronous system and a rotary system. In the fully synchronous method, the circumference of the plate cylinder (hereinafter referred to as the plate cylinder circumference) and the product length of the printed material are set to be the same, and the plate cylinder and the material are synchronized, that is, the plate cylinder rotates. In this method, printing is performed with the same speed and the traveling speed of the material (see Patent Documents 1 to 3).

  On the other hand, the rotary type does not need to set the plate cylinder circumference and the product length the same, and performs printing by fixing the plate cylinder circumference and controlling the plate cylinder itself according to the product length. (See Patent Document 4). Specifically, a rotary flexographic printing machine runs a material at a constant speed and controls acceleration / deceleration of the plate cylinder between the end of printing and the start of printing of the next product. Absorb the difference between plate cylinder circumference and product length. Thereby, the plate provided on the rotating plate cylinder can be matched with the printing position for each product in the traveling material. For example, if the plate cylinder circumference is longer than the product length, after printing is completed, the plate cylinder is accelerated and decelerated or accelerated to be constant in order to quickly align the plate with the printing start position of the next product. After the speed is reached, the vehicle is decelerated (see FIGS. 2a and 2b of Patent Document 4). On the other hand, if the plate cylinder circumference is shorter than the product length, it is necessary to wait for the plate cylinder until the print start position of the next product comes after printing is completed. Or it accelerates after decelerating and stopping (refer FIG. 3 a and b of patent document 4).

  Also known is a flexographic printing machine that performs printing by fixing the plate cylinder circumference and controlling the acceleration (deceleration) of the impression cylinder according to the product length of the printed material (patent) Reference 5). Specifically, this flexographic printing machine rotates the plate cylinder at a constant speed, and adds rotation of the impression cylinder (material travel) between the end of printing and the start of printing of the next product. By controlling the deceleration, the difference between the plate cylinder circumference and the product length is absorbed. Thereby, the plate provided on the rotating plate cylinder can be matched with the printing position for each product in the traveling material. In addition, by replacing only the plate without replacing the plate cylinder, it is possible to print a product shorter than the plate cylinder circumference.

Japanese Patent Laid-Open No. 2003-118082 JP 2002-301803 A JP 2000-187222 A Japanese Patent Laid-Open No. 58-197084 JP 2008-265010 A

  Thus, the control system of Patent Document 4 synchronizes the plate cylinder with the material. Specifically, with the material traveling at a constant speed, the plate cylinder speed (plate cylinder rotation speed) is matched with the material speed (material traveling speed) during printing, and the plate cylinder is accelerated or decelerated during non-printing. . Moreover, the control system of patent document 5 is a control system contrary to patent document 4, and synchronizes material with a plate cylinder. Specifically, with the plate cylinder running at a constant speed, the material speed matches the plate cylinder speed during printing, and the material is accelerated or decelerated during non-printing.

  FIG. 23 is a diagram illustrating a printing form, a plate cylinder speed, and a material speed in the conventional technique using a completely synchronous method, and illustrates a case where the plate cylinder circumferential length B0 and the printing length D are the same. This control system is the completely synchronous system disclosed in Patent Documents 1 to 3, and the printing cylinder is synchronized with the material, that is, printing is performed with the same printing cylinder speed and material speed. As shown in FIG. 23, since the plate cylinder circumference B0 = print length D and the plate cylinder speed = material speed, no blank time occurs between printing. The plate cylinder continues to rotate at the same speed as the material, and the material continues to travel at the same speed as the plate cylinder.

  FIG. 24 is a diagram showing a printing form, plate cylinder speed, and material speed in the prior art using a control method for synchronizing the plate cylinder with the material, and shows a case where the print length D is shorter than the plate cylinder circumferential length B0. Yes. This control method is the method described in Patent Document 4 described above. As shown in FIG. 24, since the plate cylinder circumference B0> print length D, a blank time occurs between printing. During printing, the plate cylinder rotates at the same speed as the material. On the other hand, at the time of non-printing, the plate cylinder is once accelerated and then decelerated to return to the same original speed as the material in order to adjust the next printing position to a predetermined position.

  FIG. 25 is a diagram illustrating a printing form, a plate cylinder speed, and a material speed in a conventional technique using a control method in which a material is synchronized with the plate cylinder, and shows a case where the print length D is shorter than the plate cylinder circumferential length B0. Yes. This control method is the method described in Patent Document 5 described above. As shown in FIG. 25, since plate cylinder circumference B0> print length D, a blank time occurs between printing. During printing, the material travels at the same speed as the plate cylinder. On the other hand, at the time of non-printing, the material accelerates after decelerating and returns to the same original speed as the plate cylinder in order to adjust the next printing position to a predetermined position.

  Here, in FIG. 24 and FIG. 25, when printing is performed with a printing length D that is extremely shorter than the plate cylinder circumference B0, the blank time between printing is further increased, and the blank distance on the material The printing speed for a product (printing speed based on the product length of one product) is also slow.

  In order to cope with this problem, it is assumed that the plate cylinder speed and the printing speed are increased. However, when the speed of the printing surface on the material is excessively high, ink rubbing, positional deviation, and the like are likely to occur, which is not preferable in terms of print quality.

  Incidentally, when the control method shown in FIG. 24 is used, the blank time can be shortened by increasing the acceleration and deceleration of the plate cylinder during non-printing. However, this has its limitations. This is because, since the inertia of the plate cylinder is generally large, agile acceleration / deceleration control cannot be performed, and the acceleration / deceleration time of the plate cylinder cannot be shortened. In the control system shown in FIG. 25, the material is accelerated / decelerated in place of the plate cylinder in order to compensate for the drawbacks of the acceleration / deceleration control of the plate cylinder.

  Therefore, the control method for shortening the blank time and the blank distance between printing and increasing the printing speed for the product is based on the control method for synchronizing the material with the plate cylinder shown in FIG. As shown in FIG. 24, it is desirable to accelerate and decelerate the plate cylinder.

  Accordingly, the present invention has been made to solve the above-described problems, and its object is to shorten the blank time and blank distance during which printing is not performed when printing is sequentially performed on a traveling material by a rotating plate cylinder. An object of the present invention is to provide a printing apparatus and a printing method capable of increasing the printing speed of products.

In order to achieve the above object, a printing apparatus according to the present invention controls a traveling speed of a material and also controls a rotational speed of a plate cylinder provided with a plate so that the material is divided by a predetermined product length. In each printing apparatus that sequentially prints with the plate at a predetermined position of the product, the plate cylinder is rotated in a pattern including constant speed, acceleration and deceleration based on a preset reference speed instruction and acceleration instruction. A printing reference unit for generating a reference position command for generating a reference position command for generating a rotation position pattern of the plate cylinder based on the reference speed command, and a reference position command generated by the printing reference unit A plate cylinder speed command is generated based on a reference speed command generated by the printing reference unit so that the plate cylinder rotates in a pattern of the plate cylinder, and the plate cylinder is rotated by the plate cylinder speed command. And a period from the start to the end of printing on the product at the same speed as the plate cylinder speed command, and a period from the end of the printing to the start of printing on the next product. A material control unit that decelerates and accelerates the travel, generates a material speed command of a travel speed pattern for matching a predetermined position of the next product with the plate, and travels the material according to the material speed command , The printing reference unit generates a pattern for accelerating the plate cylinder when the position indicated by the reference position command becomes the acceleration position included in the acceleration instruction, and then decelerating at a constant speed and then decelerating. A pattern including acceleration and deceleration generated by the speed increasing circuit is added to the constant speed pattern indicated by the reference speed instruction. An adder circuit that generates a reference speed command for rotating in a pattern including speed, acceleration, and deceleration, and a speed indicated by the reference speed command generated by the adder circuit are integrated and converted into a position, and the rotational position of the plate cylinder is determined. And a conversion circuit that generates a reference position command for determining a pattern .

Further, in the printing apparatus according to the present invention, the plate cylinder control unit detects a plate cylinder position indicating the rotation position of the plate cylinder, and a position indicated by the reference position command generated by the printing reference unit. Calculating a difference between the plate cylinder position detected by the position detector and outputting a plate position deviation; and multiplying the plate position deviation output by the subtractor by a preset gain. And adding a plate position deviation speed command output by the multiplier to a reference speed command generated by the printing reference unit and outputting a plate cylinder speed command. And an adder .

In addition, the printing apparatus according to the present invention controls the traveling speed of the material and also controls the rotational speed of the plate cylinder provided with the plate, and for each product in which the material is divided by a predetermined product length, A reference speed command for rotating the plate cylinder in a pattern including a constant speed, an acceleration and a deceleration based on a preset reference speed instruction and an acceleration instruction in a printing apparatus that sequentially performs printing with the plate at a predetermined position. A printing reference unit for generating a reference position command for determining a pattern of the rotational position of the plate cylinder based on the reference speed command, and the plate cylinder using the reference position command pattern generated by the printing reference unit. A plate cylinder speed command is generated based on the reference speed command generated by the printing reference unit, and the plate cylinder control unit rotates the plate cylinder according to the plate cylinder speed command. In the period from the start to the end of printing, the material is run at the same speed as the plate cylinder speed command, and the travel of the material is decelerated and accelerated in the period from the end of printing to the start of printing on the next product. A material control unit that generates a material speed command of a travel speed pattern for matching a predetermined position of the next product with the plate, and causes the material to travel according to the material speed command, and the plate cylinder control unit A position detector for detecting a position of the plate cylinder indicating the rotational position of the plate cylinder, and adding a phase correction value set in advance to the plate cylinder position detected by the position detector, thereby correcting the plate cylinder after correction. a phase circuit for outputting a position, the position indicated by the reference position command generated by the print reference portion, calculates a difference between the plate cylinder position after correction outputted by the phase circuit, the plate position error Output reduction A multiplier for multiplying the plate position deviation output by the subtracter by a preset gain and outputting a plate position deviation speed command, and the reference speed command generated by the printing reference unit, And an adder for adding the plate position deviation speed command output by the multiplier and outputting the plate cylinder speed command.

In the printing apparatus according to the present invention, the material control unit inputs a mark detection signal from a mark sensor that detects a mark attached to a predetermined position for each product, and based on a timing at which the mark detection signal is input. An actual product length calculating unit for calculating the actual product length, and generating a reference speed command (VA) based on a change in the plate cylinder position indicating the rotation position of the plate cylinder, The difference between the actual product length calculated by the actual product length calculation unit is calculated, the value of the difference is preset in a counter, and the preset is performed by the counter as the plate cylinder rotates and the material travels. The result of subtraction from the value is used as a count value, a material deviation speed command (VC) corresponding to the count value is generated, and the material deviation speed command (VC) is subtracted from the reference speed command (VA) to obtain a tuning speed command. VA-VC) is generated based on a tuning speed command (VA-VC) generation unit, an actual product length calculated by the actual product length calculation unit, and a preset print length, The calculated stop distance is preset in a counter, and the counter generates a stop speed command (VB) corresponding to the count value by using a result obtained by subtracting from the preset value as the material travels as a count value. A speed command (VB) generation unit, a tuning speed command (VA-VC) generated by the tuning speed command (VA-VC) generation unit, and a stop speed command generated by the stop speed command (VB) generation unit (VB) and a selector that selects and outputs the material speed command .

In addition, the printing apparatus according to the present invention controls the traveling speed of the material and also controls the rotational speed of the plate cylinder provided with the plate, and for each product in which the material is divided by a predetermined product length, In a printing apparatus that sequentially prints with the plate at a predetermined position, a printing unit controller is provided for each color in order to perform multicolor printing, and one of the plurality of printing unit controllers for each color is provided. The control unit for the printing unit generates a reference speed command for rotating the plate cylinder in a pattern including a constant speed, acceleration and deceleration based on a preset reference speed instruction and acceleration instruction, and the reference speed Based on the command, a printing reference unit that generates a reference position command that determines a pattern of the rotational position of the plate cylinder, and the plate cylinder rotates with a pattern of the reference position command generated by the printing reference unit. A plate cylinder speed command is generated based on a reference speed command generated by the printing reference unit, a plate cylinder control unit that rotates the plate cylinder according to the plate cylinder speed command, and from the start to the end of printing on the product. About the period, while traveling at the same speed as that of the plate cylinder speed command, the traveling of the material is decelerated and accelerated for the period from the end of the printing to the start of printing for the next product. A material speed command of a pattern of a running speed for matching the plate, and a material control unit for running the material according to the material speed command, and a plurality of printing unit control devices for each color The other printing unit control device includes the plate cylinder control unit and the material control unit .

  The printing apparatus according to the present invention includes a printing unit controller for each color in order to perform multi-color printing, and one printing unit controller among the plurality of printing unit controllers for each color. Comprises the printing reference unit, the plate cylinder control unit, and the material control unit, and among the plurality of printing unit control devices for each color, the other printing unit control device includes the plate cylinder control unit and the plate cylinder control unit. A material control unit is provided.

  Further, in the printing apparatus according to the present invention, when the print reference portion is a print portion between the first end and the last end of the respective print locations where the multicolor printing is performed, the print reference portion is constant with respect to the print portion. A reference speed for rotating with a pattern of speed, rotating with a pattern of acceleration and deceleration with respect to product parts other than the printed part, and rotating with a pattern starting acceleration at the final end of the printed part A command is generated.

Further, the printing method according to the present invention controls the traveling speed of the material and the rotational speed of the plate cylinder provided with the plate, and for each product in which the material is divided by a predetermined product length, In a printing method in which printing is sequentially performed with the plate at a predetermined position, a reference speed command for rotating the plate cylinder in a pattern including constant speed, acceleration, and deceleration based on a reference speed instruction and an acceleration instruction set in advance. Generating a reference position command for determining a pattern of the rotational position of the plate cylinder based on the reference speed command, and rotating the plate cylinder with the pattern of the reference position command. A step of generating a plate cylinder speed command based on a reference speed command, rotating the plate cylinder by the plate cylinder speed command, and a period from the start to the end of printing on the product, While traveling at the same speed as the printing cylinder speed command, the travel of the material is decelerated and accelerated during the period from the end of printing to the start of printing on the next product, and the predetermined position of the next product is moved to the plate. running speed of generating the material velocity command patterns to match the, have a, a step of moving the said material by said material velocity command, the step of generating said reference speed command, the position indicated by the reference position command Accelerating the plate cylinder when it reaches the acceleration position included in the acceleration instruction, and then generating a pattern that decelerates and decelerates thereafter, or a pattern that decelerates thereafter, and a constant speed indicated by the reference speed instruction The pattern including the acceleration and deceleration is added to the pattern, and a reference speed command for rotating the plate cylinder at a pattern including constant speed, acceleration and deceleration is generated. And generating the reference position command integrates the speed indicated by the reference speed command and converts it into a position, and generates a reference position command that defines a pattern of the rotational position of the plate cylinder. , characterized in that.

  As described above, according to the present invention, on the premise of the control method for synchronizing the material with the plate cylinder, at the time of printing, the plate cylinder is rotated at a constant speed so that the material runs at the same speed as the plate cylinder. When not printing, the plate cylinder was rotated in a pattern including acceleration and deceleration, and the material was decelerated and accelerated. As a result, the blank time and blank distance during which printing is not performed can be shortened, and the printing on the product can be speeded up. Therefore, the production efficiency of the product can be improved.

It is a figure which shows the printing form, plate cylinder speed, and material speed in embodiment of this invention. 1 is a diagram illustrating an outline of the overall configuration of a flexographic printing machine including a printing apparatus according to an embodiment of the present invention. It is a figure explaining the movement and printing position of a plate cylinder in the embodiment of the present invention, (1) shows the printing position and plate cylinder speed on the product, (2) shows the plate position on the plate cylinder. . It is a figure explaining the movement of a material and the printing position in embodiment of this invention. FIG. 3 is a block diagram illustrating a configuration of a printing unit control apparatus that performs printing control for a first color. It is a block diagram which shows the structure of the control apparatus for printing units which performs printing control of the 2nd color. It is a block diagram which shows the structure of a printing reference | standard part. It is a block diagram which shows the structure of a plate cylinder control part. It is a block diagram which shows the structure of a feed control part. It is a block diagram which shows the structure of a selector. FIG. 3 is a block diagram illustrating a configuration of a printing unit control device shared between printing units. It is a flowchart explaining the process of a printing reference | standard part. It is a flowchart explaining the process of a plate cylinder control part. It is a flowchart explaining the process of a real product length calculation part. It is a flowchart explaining the process of a VA-VC production | generation part. It is a flowchart explaining the process of a VB production | generation part. It is a flowchart explaining the process of a selector. It is a timing chart explaining the reference speed etc. (when speeding up) produced | generated by the printing reference | standard part. It is a timing chart explaining the reference speed etc. (when not increasing) produced | generated by the printing reference | standard part. It is a figure explaining the relationship between the pattern of a M2 speed command, material, and the size of a plate cylinder. It is a figure explaining the motion of the material which drive | works with the pattern of a M2 speed command with respect to the plate cylinder rotated with the pattern of a M1 speed command. It is a timing chart explaining basic operation of a feed control part. It is a figure which shows the printing form, plate cylinder speed, and material speed in the prior art using a perfect synchronous system. It is a figure which shows the printing form in the prior art using the control system which synchronizes a plate cylinder with material, a plate cylinder speed, and material speed. It is a figure which shows the printing form in the prior art using the control system which synchronizes material with a plate cylinder, plate cylinder speed, and material speed.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a printing form, a plate cylinder speed, and a material speed in the embodiment of the present invention, and shows a case where the printing length D is shorter than the plate cylinder circumferential length B0. The control method according to the embodiment of the present invention is to accelerate and decelerate the plate cylinder as shown in FIG. 24 on the assumption that the control method shown in FIG. 25 synchronizes the material with the plate cylinder. At the time of printing, the plate cylinder is rotated at the reference speed, the material is synchronized (followed) with the plate cylinder, and is driven at the same speed as the reference speed of the plate cylinder. On the other hand, at the time of non-printing, the plate cylinder is accelerated and decelerated to return to the original reference speed, and in order to adjust the next printing position to the predetermined position, the material is once decelerated and then accelerated to be the same as the reference speed of the plate cylinder. Return to the original speed. Thereby, the blank time and blank distance between printing can be shortened, and the printing with respect to a product can be accelerated.

[Flexo printing machine]
First, the flexographic printing machine will be described. FIG. 2 is a diagram illustrating an outline of the overall configuration of a flexographic printing machine including a printing apparatus according to an embodiment of the present invention. The flexographic printing machine 10 includes three printing units 1 to 3, a dancer 11-4, an unwinding machine 4, a winding machine 5, and a printing device 30. The material 6 travels from the unwinder 4 to the winder 5 via the printing units 1 to 3 and the dancer 11-4, and the first color is printed by the first printing unit 1 for each product of a predetermined length (product length). Is printed, the second color is printed by the second printing unit 2, and the third color is printed by the third printing unit 3.

  Printing control for three-color printing is performed by a printing apparatus 30 including printing unit control devices 31-1 to 31-3. The printing unit controller 31-1 controls the rotational speed (plate cylinder speed) of the plate cylinder 13-1 and the traveling speed (material speed) of the material 6 provided in the printing unit 1 that performs printing of the first color. Similarly, the printing unit control device 31-2 controls the rotational speed of the plate cylinder 13-2 and the traveling speed of the material 6 provided in the printing unit 2 that performs printing of the second color, and the printing unit control device 31- 3 controls the rotational speed of the plate cylinder 13-3 and the traveling speed of the material 6 provided in the printing unit 3 for printing the third color. The printing unit control device 31-1 performs control for printing the first color by aligning the printing position with a predetermined position on the product. Similarly, the printing unit control device 31-2 performs control for printing the second color by aligning the printing position with a predetermined position on the product, and the printing unit control device 31-3 performs predetermined control on the product. Control is performed to print the third color by aligning the print position with the position.

  The unwinder 4 unwinds the material 6, and the winder 5 winds the material 6 on which printing of three colors is performed by the printing units 1 to 3. The dancer 11-4 is provided between a later-described feed 15-3 provided in the printing unit 3 and the winder 5, and a certain amount of material is taken up when the material 6 is taken up by the winder 5. 6 Reserving is performed. A certain amount of accumulation is performed so that the feed 15-3 does not become a load on the winder 5 when the feed 15-3 travels the material 6 and the winder 5 winds up the material 6. It is. Further, when the dancer 11-4 is not provided, the winder 5 is affected by the tension applied to the material 6 by the feed 15-3, and the material 6 cannot be wound up. Because it grows.

  The printing unit 1 includes a dancer 11-1, an impression cylinder 12-1, a plate cylinder 13-1, an anilox roll 14-1, a feed 15-1, a mark sensor 16-1, a dryer 17-1, a plate cylinder motor ( M1) 18-1, a plate cylinder encoder 19-1, a feed motor (M2) 20-1, and a feed encoder 21-1.

  The dancer 11-1 is provided between the unwinding machine 4 and the feed 15-1, so that the unwinding machine 4 does not become a load on the feed 15-1 when the feed 15-1 travels the material 6. Therefore, a certain amount of material 6 is stored. This is because when the dancer 11-1 is not provided, the feed 15-1 is affected by the tension applied to the material 6 by the unwinding machine 4, and the material 6 cannot run at an appropriate speed. This is because the material 6 extends.

  The impression cylinder 12-1 and the plate cylinder 13-1 sandwich the traveling material 6 and perform printing at a predetermined position on the product in the material 6 by the plate 22-1 provided in the plate cylinder 13-1. The anilox roll 14-1 transfers the ink for printing to the plate 22-1 provided in the plate cylinder 13-1. The plate cylinder motor 18-1 is driven in accordance with the M1 speed command from the printing unit controller 31-1, and rotates the plate cylinder 13-1 and the anilox roll 14-1. The plate cylinder encoder 19-1 is a pulse signal (plate cylinder encoder signal) for detecting the rotational position (plate cylinder position) and rotational speed of the plate cylinder 13-1 as the plate cylinder motor 18-1 is driven. ) To the printing unit control device 31-1.

  The feed 15-1 causes the material 6 to travel by rotation. The feed motor 20-1 is driven according to the M2 speed command from the printing unit controller 31-1, and rotates the feed 15-1 to cause the material 6 to travel. As the feed motor 20-1 is driven, the feed encoder 21-1 sends a pulse signal (feed encoder signal) for detecting the travel position and travel speed of the material 6 to the printing unit controller 31-1. Output.

  The mark sensor 16-1 detects a mark attached to a predetermined position for each product on the material 6, and outputs a mark detection signal to the printing unit controller 31-1. The installation position of the mark sensor 16-1 is adjusted to align the printing position with a predetermined position on the product. By changing the installation position of the mark sensor 16-1, the detection timing of the mark is different, and the printing position can be adjusted to a predetermined position on the product. The dryer 17-1 dries the material 6 that is inserted and printed by the impression cylinder 12-1 and the plate cylinder 13-1.

  The printing unit 2 has the same configuration as the printing unit 1, and includes a dancer 11-2, an impression cylinder 12-2, a plate cylinder 13-2, an anilox roll 14-2, a feed 15-2, and a mark sensor 16-2. , Dryer 17-2, plate cylinder motor (M3) 18-2, plate cylinder encoder 19-2, feed motor (M4) 20-2, and feed encoder 21-2. A plate 22-2 is provided in the plate cylinder 13-2.

  The dancer 11-2 is provided between the feed 15-1 and the feed 15-2 of the printing unit 1, and when the feed 15-2 travels the material 6, the feed 15-1 is loaded with the feed 15-2. In order to prevent this, a certain amount of material 6 is stored. This is because the feed 15-2 controls the travel of the material 6 independently of the feed 15-1 of the printing unit 1. Further, when the dancer 11-2 is not provided, the feed 15-2 is affected by the tension applied to the material 6 by the feed 15-1, and the material 6 is moved at an appropriate speed regardless of the feed 15-1. This is because the material 6 cannot be traveled and the material 6 extends. Accordingly, the printing unit 2 that performs printing of the second color independently adjusts the printing position to a predetermined position on the product by independently controlling the material 6 independently of the printing unit 1 that performs printing of the first color. be able to.

  Since the impression cylinder 12-2, the plate cylinder 13-2, and the like are the same as those of the printing unit 1, their descriptions are omitted here.

  The printing unit 3 has the same configuration as the printing units 1 and 2, and includes a dancer 11-3, an impression cylinder 12-3, a plate cylinder 13-3, an anilox roll 14-3, a feed 15-3, and a mark sensor 16. -3, dryer 17-3, plate cylinder motor (M5) 18-3, plate cylinder encoder 19-3, feed motor (M6) 20-3, and feed encoder 21-3. A plate 22-3 is provided on the plate cylinder 13-3.

  The dancer 11-3 is provided between the feed 15-2 and the feed 15-3 of the printing unit 2, and when the feed 15-3 travels the material 6, the feed 15-2 is loaded with the feed 15-3. In order to prevent this, a certain amount of material 6 is stored. This is because the feed 15-3 controls the travel of the material 6 independently of the feed 15-2 of the printing unit 2 and the feed 15-1 of the printing unit 1. Further, when the dancer 11-3 is not provided, the feed 15-3 is affected by the tension applied to the material 6 by the feed 15-2, and the material 6 is moved to an appropriate speed regardless of the feed 15-2. This is because the material 6 cannot be traveled and the material 6 extends. As a result, the printing unit 3 that performs printing of the third color independently controls the travel of the material 6 independently of the printing unit 2 that performs printing of the second color and the printing unit 1 that performs printing of the first color. The printing position can be adjusted to a predetermined position on the product.

  Since the impression cylinder 12-3, the plate cylinder 13-3, and the like are the same as those of the printing units 1 and 2, description thereof is omitted here.

  The printing unit control device 31-1 of the printing apparatus 30 generates a reference position command and a reference speed command based on a preset reference speed instruction and a speed increase instruction, and uses the reference position command and the reference speed command for the printing unit. Output to the control devices 31-2 and 31-3. Further, the printing unit control device 31-1 receives a plate cylinder encoder signal from the plate cylinder encoder 19-1 and determines the plate cylinder position (rotational position (angle) of the plate cylinder 13-1 with respect to the origin). Based on the calculated plate cylinder position, reference position command and reference speed command, a pattern for determining the rotational speed of the plate cylinder 13-1 is generated and output to the plate cylinder motor 18-1 as an M1 speed command. Further, the printing unit control device 31-1 receives the mark detection signal from the mark sensor 16-1 and also receives the feed encoder signal from the feed encoder 21-1, the input timing of the mark detection signal, and the feed encoder signal. A pattern for determining the traveling speed of the material 6 is generated based on the plate cylinder position, the plate cylinder circumferential length B0, and the product length L, such as the traveling position and traveling speed of the material 6 obtained from the above, and the feed motor 20 is used as the M2 speed command. Output to -1.

  As described above, the printing unit controller 31-1 rotates the plate cylinder 13-1 according to the M1 speed command, controls the feed 15-1 according to the M2 speed command, and causes the material 6 to travel. When the printing length D is extremely shorter than the plate cylinder perimeter B0, the material 6 is controlled to travel at a constant speed so as to follow the rotation of the plate cylinder 13-1 during printing, and the plate cylinder 13- 1 is accelerated and decelerated, and material 6 is decelerated and accelerated. Further, based on the input timing of the mark detection signal, that is, based on the installation position of the mark sensor 16-1, the printing position by the plate 22-1 provided on the plate cylinder 13-1 is set to a predetermined position on the product. Match. As a result, the first color is printed in the printing unit 1.

  Here, the preset reference speed instruction is a common instruction that determines the rotational speed of the plate cylinders 13-1 to 13-3 during printing and the traveling speed of the material 6 in all the printing units 1 to 3. . Similarly, the reference position command and the reference speed command generated based on the reference speed instruction are common instructions for all the printing units 1 to 3. Further, the preset speed increasing instruction is information including a speed increasing position (angle) for accelerating the plate cylinders 13-1 to 13-3 from a constant speed, an upper limit speed, and the like. Similarly, the preset plate cylinder circumference B0 and the product length L are data commonly used in all the printing units 1 to 3.

  The printing unit control device 31-2 receives the reference position command and the reference speed command from the printing unit control device 31-1, and also receives the plate cylinder encoder signal from the plate cylinder encoder 19-2, thereby inputting the plate cylinder position. And a pattern for determining the rotational speed of the plate cylinder 13-2 is generated based on the plate cylinder position, the reference position command, and the reference speed command, and is output to the plate cylinder motor 18-2 as an M3 speed command. Similarly to the printing unit controller 31-1, the printing unit controller 31-2 receives a mark detection signal from the mark sensor 16-2 and a feed encoder signal from the feed encoder 21-2. A pattern for determining the travel speed of the material 6 based on the plate cylinder position, the plate cylinder circumferential length B0, and the product length L, such as the input timing of the mark detection signal, the travel position and travel speed of the material 6 obtained from the feed encoder signal. Is output to the feed motor 20-2 as an M4 speed command.

  In this way, the printing unit controller 31-2 rotates the plate cylinder 13-2 according to the M3 speed command, controls the feed 15-2 according to the M4 speed command, and causes the material 6 to travel. When the printing length D is extremely shorter than the plate cylinder circumference B0, the material 6 is controlled to run at a constant speed so as to follow the rotation of the plate cylinder 13-2 during printing, and the plate cylinder 13- 2 is accelerated and decelerated, and material 6 is decelerated and accelerated. Further, based on the input timing of the mark detection signal, that is, based on the installation position of the mark sensor 16-2, the printing position by the plate 22-2 provided on the plate cylinder 13-2 is set to a predetermined position on the product. Match. As a result, the printing unit 2 performs the second color printing.

  The printing unit control device 31-3 is the same as the printing unit control device 31-2. In this way, the printing unit control device 31-3 rotates the plate cylinder 13-3 according to the M5 speed command, controls the feed 15-3 according to the M6 speed command, and causes the material 6 to travel. When the printing length D is extremely shorter than the plate cylinder circumference B0, the material 6 is controlled to run at a constant speed so as to follow the rotation of the plate cylinder 13-3 during printing, and the plate cylinder 13- 3 is accelerated and decelerated, and material 6 is decelerated and accelerated. Further, based on the input timing of the mark detection signal, that is, based on the installation position of the mark sensor 16-3, the printing position by the plate 22-3 provided in the plate cylinder 13-3 is set to a predetermined position on the product. Match. As a result, the third color is printed in the printing unit 3.

[Plate cylinder movement, material movement and printing position]
Next, the movement of the plate cylinders 13-1 to 13-3, the movement of the material 6, and the printing position in the flexographic printing machine 10 shown in FIG. 2 will be described. FIG. 3 is a diagram for explaining the movement and printing position of the plate cylinders 13-1 to 13-3. FIG. 3A shows the printing position on the product and the plate cylinder speed. For each product of product length L obtained by dividing the material 6, printing α is performed by the printing unit 1, printing β is performed by the printing unit 2, and printing γ is performed by the printing unit 3. The printing position is as shown in FIG. Printing is performed from the beginning of printing α to the end of printing γ, and the distance is set as a printing length D. The M1 speed command, the M3 speed command of the plate cylinder 13-2, and the M5 speed of the plate cylinder 13-3, which are patterns for determining the rotational speed of the plate cylinder 13-1 for realizing such printing α, β, γ. The command is a constant speed with respect to the print length D including the print location, and is a pattern of acceleration and deceleration with respect to other than the print length D not including the print location. The M1 speed command, the M3 speed command, and the M5 speed command are the same pattern, and the constant speed pattern includes areas where printing α, β, and γ are performed.

  FIG. 3B shows the positions of the plates 22-1 to 22-3 provided on the plate cylinders 13-1 to 13-3. The diameters of the plate cylinders 13-1 to 13-3 are assumed to be the same. The plate 22-1 on the plate cylinder 13-1, the plate 22-2 on the plate cylinder 13-2, and the plate 22-3 on the plate cylinder 13-3 are printed α, β, In order to realize γ, it is provided at the position shown in FIG. The positions of the plates 22-1 to 22-3 on the plate cylinders 13-1 to 13-3 correspond to the positions of the prints α, β, and γ on the product shown in FIG. If the angle corresponding to the print length D is 70 °, printing is performed in the 70 ° section and printing is not performed in the 290 ° section. That is, a 70 ° section from the position a to the position b corresponds to a constant speed region with respect to the printing length D of the M1 speed command, the M3 speed command, and the M5 speed command, and the position from the position b to the position c. The 145 ° interval up to 145 corresponds to the acceleration region, and the 145 ° interval from the position c to the position a corresponds to the deceleration region.

  FIG. 4 is a diagram for explaining the movement of the material 6 and the printing position. As shown in FIG. 4, the M2 speed command is a command for performing printing α at a predetermined position for each product of the material 6, and is a synchronized speed command VA for acceleration (u to v) and constant speed (v to w). This is a command in which a pattern composed of -VC and a deceleration (w to x) stop speed command VB is repeated. The M2 speed command includes acceleration (u to v) and constant speed (v to w) tuning speed commands VA-VC, and deceleration (w to x) and stop (x to u, not shown) stop speeds. There may be a case where a pattern including the command VB is repeated. In the present embodiment, an example in which the traveling of the material 6 does not stop will be described.

  Specifically, the M2 speed command starts acceleration when the predetermined position of the product is at the insertion position of the plate cylinder 13-1 (u), and the plate 22-1 provided in the plate cylinder 13-1 The speed is constant during the period of the insertion position (v to w), then decelerated (w to x), and acceleration is resumed when the predetermined position of the next product is at the insertion position of the plate cylinder 13-1 ( u) A pattern that takes a trajectory. As described above, there may be a pattern in which the vehicle decelerates after a constant speed (v to w) (w to x) and takes a trajectory that stops when the predetermined position of the next product is at the insertion position of the plate cylinder 13-1. Here, the constant speed (v to w) in the tuning speed command VA-VC is the same as the rotational speed of the plate cylinder 13-1 rotating at a constant speed, and printing α is performed at this time. The printing unit controller 31-1 of the printing apparatus 30 shown in FIG. 2 generates such a pattern and outputs the pattern to the feed motor 20-1 as an M2 speed command. As a result, the material 6 travels in this pattern.

  The M4 speed command of the feed 15-2 in the printing unit 2 and the M6 speed command of the feed 15-3 in the printing unit 3 are also commands for performing printing β and γ at predetermined positions for each product of the material 6, respectively. . The printing unit controllers 31-2 and 31-3 of the printing apparatus 30 shown in FIG. 2 generate such patterns and output them to the feed motors 20-2 and 20-3 as M4 and M6 speed commands. . Thereby, the material 6 will each drive | work with these patterns.

  Also, as shown in FIG. 4, a plurality of continuous products are produced on the material 6 by forming the printing α, β, γ for each product of the product length L. The material 6 is previously marked with a product length L interval for each product.

  The printing α is performed at a predetermined position by the plate cylinder 13-1 and the impression cylinder 12-1 when the material 6 is traveling at the same speed as the plate cylinder 13-1. Similarly, the printing β is made at a predetermined position by the plate cylinder 13-2 and the impression cylinder 12-2 when the material 6 is traveling at the same speed as the plate cylinder 13-2. Is moved to a predetermined position by the plate cylinder 13-3 and the impression cylinder 12-3 when traveling at the same speed as the plate cylinder 13-3.

  The starting positions of the printing α, β, γ are controlled to travel the material 6 by M2, M4, and M6 speed commands based on changes in the input timing of the mark detection signal, that is, the installation positions of the mark sensors 16-1 to 16-3. By doing so, it is adjusted to a predetermined position on the product. For example, by changing the installation position of the mark sensor 16-2, printing β can be performed at a position shifted by a displacement amount k2 as in the M4 speed command of FIG. That is, the start positions of the printing α, β, γ can be determined by changing the installation positions of the mark sensors 16-1 to 16-3. The relationship between the installation positions of the mark sensors 16-1 to 16-3 and the shift amounts (start positions) of the printing α, β, and γ is a trial run in which printing is performed by changing the installation positions of the mark sensors 16-1 to 16-3. And can be obtained by collecting data.

[Printing device / printing unit controller]
Next, the printing unit control devices 31-1 to 31-3 of the printing device 30 illustrated in FIG. 2 will be described. FIG. 5 is a block diagram illustrating a configuration of a printing unit control device 31-1 that performs printing control of the first color for the printing unit 1. The printing unit control device 31-1 includes a printing reference unit 32, a plate cylinder control unit 33-1, and a feed control unit (material control unit) 34-1.

  The print reference unit 32 generates a reference speed command based on a preset reference speed instruction and a speed increase instruction (acceleration position, upper limit speed, etc.), generates a reference position command based on the reference speed command, The position command and the reference speed command are output to the plate cylinder control unit 33-1 and the printing unit controllers 31-2 and 31-3. Details of the print reference unit 32 will be described later.

  The plate cylinder control unit 33-1 receives a reference position command and a reference speed command from the printing reference unit 32, and also inputs a plate cylinder encoder signal from the plate cylinder encoder 19-1, and determines the plate cylinder position from the plate cylinder encoder signal. And M1 speed command is generated by feedforward control based on the plate cylinder position, reference position command, reference speed command and a preset phase correction value, and the M1 speed command is output to the plate cylinder motor 18-1. To do. As a result, the plate cylinder 13-1 rotates at a speed indicated by the M1 speed command. Further, the plate cylinder control unit 33-1 outputs the plate cylinder position to the feed control unit 34-1. Details of the plate cylinder control unit 33-1 will be described later.

  The feed control unit 34-1 receives the plate cylinder position from the plate cylinder control unit 33-1 and also receives a mark detection signal from the mark sensor 16-1 and a feed encoder signal from the feed encoder 21-1. The feed control unit 34-1 sets the plate cylinder position, the input timing of the mark detection signal, the travel position of the material 6 obtained from the feed encoder signal, etc., and the plate cylinder circumference B0 and the product length L set in advance. Based on this, a pattern for determining the traveling speed of the material 6 is generated and output to the feed motor 20-1 as an M2 speed command. Details of the feed control unit 34-1 will be described later.

  FIG. 6 is a block diagram illustrating a configuration of a printing unit control device 31-2 that performs printing control for the second color on the printing unit 2. As illustrated in FIG. The printing unit controller 31-2 includes a plate cylinder controller 33-2 and a feed controller 34-2.

  When the printing unit control device 31-1 shown in FIG. 5 is compared with the printing unit control device 31-2 shown in FIG. 6, the printing unit control devices 31-1, 31-2 are both the plate cylinder control unit. 3-1, 33-2 and the feed control units 34-1 and 34-2 are common. On the other hand, the printing unit control device 31-1 is provided with a printing reference unit 32, whereas the printing unit control device 31-2 is different in that the printing reference control unit 32 is not provided.

  The plate cylinder control unit 33-2 of the printing unit controller 31-2 receives the reference position command and the reference speed command from the printing unit controller 31-1, and the plate cylinder encoder 19-2 from the plate cylinder encoder. A signal is input, and the M3 speed command is generated by feedforward control based on the plate cylinder position, the reference position command, the reference speed command, and a preset phase correction value, similarly to the plate cylinder control unit 33-1. A speed command is output to the plate cylinder motor 18-2. As a result, the plate cylinder 13-2 rotates at a speed indicated by the M3 speed command. Further, the plate cylinder control unit 33-2 outputs the plate cylinder position to the feed control unit 34-2.

  The feed control unit 34-2 receives the plate cylinder position from the plate cylinder control unit 33-2, and also receives a mark detection signal from the mark sensor 16-2 and a feed encoder signal from the feed encoder 21-2. Then, the feed control unit 34-2 sets the plate cylinder position, the input timing of the mark detection signal, the travel position of the material 6 obtained from the feed encoder signal, etc., and the plate cylinder circumference B0 and the product length L set in advance. Based on this, a pattern for determining the traveling speed of the material 6 is generated and output to the feed motor 20-2 as an M4 speed command.

  The configuration of the printing unit control device 31-3 that performs printing control for the third color on the printing unit 3 is the same as that of the printing unit control device 31-2, and thus the description thereof is omitted here.

  Further, the M2, M4, and M6 speed commands of the material 6 generated by the printing unit control devices 31-1 to 31-3 have different patterns according to the printing position and the printing α, β, and γ. The traveling of the material 6 varies depending on the printing units 1 to 3 along with the difference in the pattern, but the traveling difference can be absorbed by the dancers 11-1 to 11-4.

[Print standard section]
Next, the printing reference unit 32 of the printing unit control device 31-1 shown in FIG. 5 will be described. FIG. 7 is a block diagram illustrating a configuration of the print reference unit 32. 12 is a flowchart for explaining the processing of the print reference unit 32. FIG. 18 is a timing for explaining the reference speed generated by the print reference unit 32 when the plate cylinder 13-1 is accelerated. It is a chart. The printing reference unit 32 includes a speed transmitter 101, a speed increasing circuit 102, an adding circuit 103, and an angle conversion circuit 104.

  The speed transmitter 101 inputs a preset reference speed instruction, and when there is a change in the reference speed instruction, the input reference speed instruction is calculated so as to reduce the steep change and change into a ramp shape. Then, a reference speed is generated and output to the speed increasing circuit 102 and the adding circuit 103 (step S1201). As shown in FIG. 18, the reference speed generated in step S1201 changes in a ramp shape from 0 to a reference speed instruction value, and thereafter maintains the reference speed instruction value.

  The speed increasing circuit 102 inputs a reference speed from the speed transmitter 101, inputs a speed increasing instruction (speed increasing position, upper limit speed, etc.) set in advance, and further inputs a reference position command from the angle conversion circuit 104. To do. The speed increasing circuit 102 generates only the acceleration and deceleration patterns in the plate cylinder speed pattern shown in FIG. 1, that is, only the acceleration and deceleration triangular patterns in the M1 speed command shown in FIG. Then, this triangular pattern is output to the adder circuit 103 as an acceleration (step S1202). As shown in FIG. 18, the triangular pattern of the acceleration generated in step S1202 maintains 0 from the start time to the time ta corresponding to the acceleration position, and from the time ta to the time tc. The pattern increases and decreases between time tc and time tb. Specifically, referring to FIG. 18, speed increasing circuit 102 determines whether or not the reference speed input from speed transmitter 101 is constant at the reference speed instruction value. Generate and output an increase of zero. When the angle indicated by the reference position command from the angle conversion circuit 104 is compared with the acceleration position (angle) included in the acceleration instruction, and it is determined that the angle indicated by the reference position command has reached the acceleration position, After that time ta, an acceleration increasing from 0 at a predetermined acceleration is calculated and output. Then, after the time tc when a predetermined time has elapsed, an acceleration that decreases at a predetermined deceleration is calculated and output. When the speed increase exceeds the upper limit speed, the upper limit speed is output as the speed increase. In this case, it is not a triangular pattern but a trapezoidal pattern. Then, when the acceleration reaches 0, 0 is maintained from the time tb, and the process of comparing the angle of the reference position command and the acceleration position is performed. In this way, the speed increasing circuit 102 sequentially generates triangular patterns.

  Here, the acceleration from the time point ta to the time point tc and the slope of the deceleration from the time point tc to the time point tb are the same, and the speed increase is calculated to be a symmetric speed with respect to the time point tc. The In one product cycle of a later-described reference speed command pattern shown in FIG. 18, a triangular pattern of acceleration and deceleration corresponds to the acceleration. In this reference speed command pattern, the constant speed area is a distance (printing length D) equivalent to 70 ° during printing (see FIGS. 3 (1) and 2), and the acceleration and deceleration areas are not printed. Is a distance equivalent to 290 ° (product length L−printing length D). Therefore, the triangular pattern of acceleration and deceleration has a reference speed, an upper limit speed, an acceleration and a deceleration speed so that the area when the reference speed is added becomes a distance (LD) equivalent to 290 ° at the time of non-printing. It is uniquely determined from the upper limit value of the inclination or one product cycle time (production time of one product: corresponding to tb in FIG. 18). The position a shown in FIG. 3B corresponds to the time point ta, the position c corresponds to the time point tc, and the position b corresponds to the time point tb.

  The adder circuit 103 receives the reference speed from the speed transmitter 101 and also inputs the speed increase from the speed increase circuit 102 and adds them to generate a reference speed command (step S1203). The data is output to the cylinder controller 33-1 and the printing unit controllers 31-2 and 31-3 (step S1204). The reference speed command generated in step S1203 is the basis of the plate cylinder speed pattern, and the value of the reference speed instruction is maintained from the start time to the time ta corresponding to the acceleration position as shown in FIG. The pattern increases from time ta to time tc and decreases from time tc to time tb.

  The angle conversion circuit 104 receives the reference speed command from the adder circuit 103, integrates the speed indicated by the reference speed command, converts it into a position, generates a reference position command (step S1205), and the plate cylinder control unit 33-1. The data is output to the printing unit controllers 31-2 and 31-3 (step S1206). Specifically, the angle conversion circuit 104 converts the reference speed command into a pulse by frequency conversion, and adds (integrates) the value of the pulse to generate a reference position command. The reference position command generated in step S1205 has a pattern as shown in FIG.

  As described above, the print reference unit 32 generates the reference speed command and the reference position command based on the reference speed instruction and the acceleration instruction. The reference speed command is a command for rotating the plate cylinders 13-1 to 13-3 of the printing units 1 to 3 in a pattern of constant speed, acceleration and deceleration, and the reference position command is a plate of the printing units 1 to 3. When the cylinders 13-1 to 13-3 are rotated by the reference speed command, the command is used to synchronize the position with the rotation position.

  FIG. 19 is a timing chart for explaining the reference speed generated by the printing reference unit 32 when the plate cylinder 13-1 is not accelerated. When the plate cylinder 13-1 does not increase speed and maintains a constant speed, there is no speed increasing instruction input to the speed increasing circuit 102. Therefore, the speed increasing generated by the speed increasing circuit 102 as shown in FIG. Is a pattern that maintains 0, and the reference speed command generated by the adder circuit 103 is a pattern that maintains the value of the reference speed instruction. Further, the reference position command generated by the angle conversion circuit 104 has a pattern that increases from 0 from the start time to the time of one product cycle and returns to 0 at the time of one product cycle. Thus, according to the reference position command pattern shown in FIG. 18 and the reference position command pattern shown in FIG. 19, the time of one product cycle can be shortened in FIG. Accordingly, it is possible to increase the printing speed of the product and improve the production efficiency of the product.

[Plate cylinder control unit]
Next, the plate cylinder controller 33-1 of the printing unit controller 31-1 shown in FIG. 5 will be described. FIG. 8 is a block diagram showing the configuration of the plate cylinder control unit 33-1. FIG. 13 is a flowchart for explaining processing of the plate cylinder control unit 33-1. The plate cylinder control unit 33-1 includes a position detector 111, a phase circuit 112, a subtractor 113, a multiplier 114, a position deviation limiter 115, and an adder 116.

  The position detector 111 receives a plate cylinder encoder signal including a signal indicating the origin of the plate cylinder 13-1 from the plate cylinder encoder 19-1, and a plate cylinder position (of the plate cylinder 13-1 of the plate cylinder 13-1) based on the origin. Rotation position (angle)) is detected and output to the phase circuit 112 and the feed control unit 34-1 (step S1301). For example, the position detector 111 detects data that changes from a 0 ° position to a 360 ° position (rotation position data when the plate cylinder 13-1 makes one rotation), with the origin being 0, as the plate cylinder position. The signal indicating the origin of the plate cylinder 13-1 is a signal indicating that the rotating plate cylinder 13-1 is in a predetermined position. That is, the position detector 111 calculates a rotational position (angle) with reference to the origin, and detects the calculated rotational position as a plate cylinder position.

  The plate cylinder position output by the position detector 111 is the rotational position (starting position of the plate 22-1) at which printing starts on the material 6 by the plate 22-1 provided on the plate cylinder 13-1. ), And the rotation position (end point position of the plate 22-1) at the timing when the printing on the material 6 is completed by the plate 22-1 is recognized. The rotation position setting values indicating the plate cylinder positions at the start and completion of printing are stored in advance in the printing unit control device 31-1.

  The phase circuit 112 inputs the plate cylinder position from the position detector 111, inputs a preset phase correction value, adds the phase correction value to the plate cylinder position, and subtracts the corrected plate cylinder position by the subtractor 113. (Step S1302). The phase correction value is data for determining the phase of the plate cylinder 13-1. The subtractor 113 inputs the corrected plate cylinder position from the phase circuit 112 and also inputs the reference position command from the printing reference unit 32, and subtracts the corrected plate cylinder position from the reference position command to obtain the plate position deviation. It is obtained and outputted to the multiplier 114 (step S1303).

  The multiplier 114 receives the plate position deviation from the subtractor 113, multiplies the gain K to obtain a plate position deviation speed command, and outputs it to the position deviation limiter 115 (step S1304). The position deviation limiter 115 receives the plate position deviation speed command from the multiplier 114. If the value of the plate position deviation speed command exceeds a preset value, the value of the plate position deviation speed command is preset. The value is limited to a value and output to the adder 116. The adder 116 inputs the plate position deviation speed command from the position deviation limiter 115 and also inputs the reference speed command from the printing reference unit 32, and adds the plate position deviation speed command to the reference speed command to generate the M1 speed command. (Step S1305). The adder 116 outputs the M1 speed command to the plate cylinder motor 18-1 (step S1306).

  When the plate cylinder control unit 33-1 is operating stably, the plate position deviation output by the subtractor 113 is 0, and the adder 116 outputs the reference speed command as the M1 speed command. . On the other hand, when the plate cylinder 13-1 is not rotated at the position indicated by the reference position command, the subtractor 113 and the multiplier are rotated so that the plate position deviation is zero. A plate position deviation speed command is generated by 114, and the adder 116 adds the plate position deviation speed command to generate and output an M1 speed command. When the plate cylinder 13-1 rotates at the position indicated by the reference position command, the plate position deviation becomes 0, and the plate cylinder control unit 33-1 operates stably. In this way, the plate cylinder 13-1 rotates according to the M1 speed command.

  In this way, the plate cylinder control unit 33-1 rotates the plate cylinder 13-1 in accordance with the reference speed command pattern generated based on the preset reference speed command and the speed increase command based on the M1 speed command. be able to. In addition, the plate cylinder control unit 33-1 performs the feedforward control by the position detector 111, the phase circuit 112, the subtractor 113, the multiplier 114, the position deviation limiter 115, and the adder 116, and the position indicated by the reference position command. By synchronously controlling the plate cylinder position, the plate cylinder 13-1 can be rotated while aligning the plate cylinder position with the position indicated by the reference position command. For example, even if a deviation occurs in the plate cylinder position due to a roll slip of the plate cylinder 13-1, the plate cylinder position is adjusted to the position indicated by the reference position command without accumulating the deviation. be able to. In this case, since the reference position command is a command common to the printing units 1 to 3, the printing cylinder positions of the plate cylinders 13-1 to 13-3 are located at the common position indicated by the reference position command in the printing units 1 to 3. The plate cylinders 13-1 to 13-3 can be rotated while aligning each of them. The phases of the plate cylinders 13-1 to 13-3 can be set by the phase correction value input to the phase circuit 112, and can be set differently for each printing unit 1 to 3.

  Note that the printing cylinder controller 33-2 of the printing unit controller 31-2 and the printing cylinder controller 33-3 of the printing unit controller 31-3 shown in FIG. Since it is the same as that of the first plate cylinder control unit 33-1, the description thereof is omitted here.

(Plate cylinder phase setting)
Next, a process for controlling the rotation of the plate cylinders 13-1 to 13-3 at a predetermined phase will be described. As described above, the plate cylinder control units 33-1 to 33-3 control the rotation of the plate cylinders 13-1 to 13-3 with a phase shifted by the phase correction value input to the phase circuit 112. That is, the plate cylinders 13-1 to 13-3 can be rotated at a predetermined phase by a phase correction value set in advance by an operator.

  In general, since the plates 22-1 to 22-3 are provided at predetermined positions with respect to the reference lines on the plate cylinders 13-1 to 13-3, the plate cylinders 13-1 to 13-1 are set when no phase correction value is set. The phase between 13 and 3 varies. That is, since printing is performed between the printing units 1 to 3 at independent timings, the influences of the looseness, tension and slip of the material 6 are reflected on the dancers 11-1 to 11-4 at different timings. The amount of accumulation of the material 6 by the dancers 11-1 to 11-4 (positions of the dancers 11-1 to 11-4) varies individually. On the other hand, when the phase correction value is set, the phase between the plate cylinders 13-1 to 13-3 can be matched, and printing is performed at the same timing. The influence is simultaneously reflected on the dancers 11-1 to 11-4, and these influences are absorbed as a whole. That is, the fluctuation | variation of the accumulation amount (position of dancers 11-1 to 11-4) of the material 6 by the dancers 11-1 to 11-4 can be suppressed to the minimum.

[Feed control unit]
Next, the feed control unit 34-1 of the printing unit control device 31-1 shown in FIG. 5 will be described. FIG. 9 is a block diagram illustrating a configuration of the feed control unit 34-1. The feed control unit 34-1 includes an actual product length calculation unit 210, a VA-VC generation unit (tuning speed command generation unit) 220, a VB generation unit (stop speed command generation unit) 230, and a selector 240.

  The actual product length calculation unit 210 receives the plate cylinder position from the plate cylinder control unit 33-1 and also receives the mark detection signal from the mark sensor 16-1 and the feed encoder signal from the feed encoder 21-1. Then, the actual product length calculation unit 210 receives the preset product length L, calculates the actual product length RL based on the input timing of the mark detection signal, and generates the actual product length RL from the VA-VC generation unit 220 and the VB generation. Output to the unit 230. Here, the actual product length RL is a value that temporarily changes as the installation position of the mark sensor 16-1 is changed, in other words, temporarily as the input timing of the mark detection signal changes. It is a value that changes. When the actual product length RL temporarily changes, the acceleration start point of the material deviation speed command VC moves and the printing position changes. That is, by changing the installation position of the mark sensor 16-1, the input timing of the mark detection signal is changed, the actual product length RL is temporarily changed, the acceleration start point of the material deviation speed command VC is moved, The printing position can be changed.

  The VA-VC generation unit 220 inputs the plate cylinder position from the plate cylinder control unit 33-1, the feed encoder signal from the feed encoder 21-1, and the actual product length RL from the actual product length calculation unit 210. . The VA-VC generation unit 220 calculates a reference speed command VA that is the rotational speed of the plate cylinder 13-1 based on the change amount of the plate cylinder position, and outputs the reference speed command VA to the VB generation unit 230. Further, the VA-VC generation unit 220 sets the input plate cylinder position and a preset rotation position setting value (plate cylinder position corresponding to the print α end position) indicating the plate cylinder position when printing is completed. Based on this, a print completion is generated and output to the VB generation unit 230 and the selector 240. The VA-VC generation unit 220 subtracts the actual product length RL from the preset plate cylinder circumference B0, and the subtraction result, the subsequent plate cylinder position, and the travel position of the material 6 indicated by the feed encoder signal. Based on the above, the material deviation speed command VC is calculated. The VA-VC generation unit 220 outputs a tuning speed command VA-VC, which is a reference speed command VA-material deviation speed command VC, to the selector 240, calculates a rate R based on the reference speed command VA, and outputs VB The data is output to the generation unit 230.

  The VB generation unit 230 receives the actual product length RL from the actual product length calculation unit 210 and the feed encoder signal from the feed encoder 21-1, and also completes printing, the rate R and the reference speed command from the VA-VC generation unit 220. Enter VA. Then, the VB generation unit 230 calculates a stop speed command VB based on the actual product length RL, the travel position of the material 6 indicated by the subsequent feed encoder signal, and outputs the stop speed command VB to the selector 240.

  The selector 240 receives the print completion and tuning speed command VA-VC from the VA-VC generation unit 220 and the stop speed command VB from the VB generation unit 230, and inputs the tuning speed command VA-VC or the stop speed command VB to the M2 speed command. Is output to the feed motor 20-1.

  FIG. 20 is a diagram for explaining the relationship between the pattern of the M2 speed command and the size of the material 6 and the plate cylinder 13-1. The pattern of the M2 speed command generated by the feed control unit 34-1 includes acceleration and constant speed command VA-VC generated by the VA-VC generating unit 220, deceleration generated by the VB generating unit 230, and It consists of a stop speed command VB for stop (in this example, only deceleration).

  The material 6 is marked at a distance of m from the starting end of the product at intervals of the product length L at predetermined locations for each product. If the distance from the starting end of the product to the printing start position of the printing α by the plate cylinder 13-1 is c, the printing length of the printing α is a, and the distance from the printing end position to the end of the product is b, M2 The distance traveled by the acceleration of the synchronized speed command VA-VC constituting the speed command (the area of the acceleration portion in the pattern of the M2 speed command) is c. Further, the distance traveled by the constant speed of the synchronized speed command VA-VC (area of the constant speed portion) is a, and the distance traveled by the deceleration of the stop speed command VB (area of the deceleration portion) is b. In this case, the travel distance of the material 6 by acceleration, constant speed and deceleration from time t0 to time t2 is c + a + b, and this distance is product length L = a + b + c. In FIG. 20, the distance traveled by acceleration in the M2 speed command is the same as the distance c from the beginning of the product to the print start position of the print α, and the distance traveled by deceleration in the M2 speed command Although the case where the distance b from the print end position of the print α to the end of the product is the same is shown, it is not necessarily the same. For example, if the base point is a position away from the print start position of the print α by a distance (L−a) / 2 from the start end of the product, the distance traveled by acceleration in the M2 speed command and printing from the base point The distance (La) / 2 to the print start position of α is the same, the distance traveled by deceleration in the M2 speed command, and the distance from the print end position of print α to the base point of the next product The distance (L−a) / 2 may be the same. The same applies to FIG. 21 described later.

  FIG. 20 shows a schematic diagram when the plate cylinder 13-1 is extended linearly. The length of the plate 22-1 is equal to the printing length a, and the plate cylinder 13-1 rotates at a constant speed at least in the printing length a.

  FIG. 21 is a diagram for explaining the movement of the material 6 traveling in the M2 speed command pattern with respect to the plate cylinder 13-1 rotating in the M1 speed command pattern shown in FIG. is there. The feed control unit 34-1 generates the M2 speed command shown in FIG. 20 so that the material 6 operates in the order of (1) to (4) shown in FIG. In FIG. 21, (1) indicates a time point t1 = tb when the material 6 finishes the acceleration travel and starts a constant speed travel (see FIG. 20) (tb corresponds to tb in FIG. 18. ta, tc). The same is true for.). At this time t1, the plate cylinder 13-1 finishes decelerating and starts to rotate at a constant speed. If the printing start position at a distance c from the starting edge of the product is a1, the starting point of the plate 22-1 provided on the plate cylinder 13-1 exists on the printing start position a1. That is, the printing start position a1 of the material 6 exists and the starting point of the plate 22-1 exists at the insertion position between the plate cylinder 13-1 and the impression cylinder 12-1 into which the material 6 is inserted. . Printing starts from here, and the running speed of the material 6 and the rotational speed of the plate cylinder 13-1 become the same.

  (2) shows a state at time t2 when the material 6 finishes traveling at a constant speed and starts decelerating. At this time t2, the plate cylinder 13-1 is rotating at a constant speed. Assuming that the printing end position of the product is a2, the end point of the plate 22-1 provided on the plate cylinder 13-1 exists on the printing end position a2, and the printing ends here. That is, the printing end position a2 of the material 6 exists at the insertion position of the plate cylinder 13-1, and the end point of the plate 22-1 exists.

  (3) shows a state at the time point t3 = ta when the material 6 continues to travel at a reduced speed. At this time point t3, the plate cylinder 13-1 starts accelerating after finishing the constant speed.

  (4) shows a state at time t4 = t0 = tc when the material 6 finishes the deceleration travel and starts the acceleration travel. At this time t4, the plate cylinder 13-1 finishes accelerating and begins to decelerate. The terminal end of the product (the start end of the next product) exists at the insertion position between the plate cylinder 13-1 and the impression cylinder 12-1 into which the material 6 is inserted.

[Real product length calculation section]
Next, the actual product length calculation unit 210 of the feed control unit 34-1 illustrated in FIG. 9 will be described. As described above, the actual product length calculation unit 210 inputs the plate cylinder position, the mark detection signal, and the feed encoder signal, and uses the preset product length L to calculate the actual product length RL according to the input timing of the mark detection signal. The actual product length RL is calculated and output to the VA-VC generation unit 220 and the VB generation unit 230. Referring to FIG. 9, the actual product length calculation unit 210 includes a mark detector 211 and a mask processing unit 212.

  FIG. 14 is a flowchart for explaining the processing of the actual product length calculation unit 210. When the mark detector 211 of the actual product length calculator 210 receives the mark detection signal from the mark sensor 16-1, the mark detector 211 outputs the mark detection signal to the mask processor 212 (step S1401). The mask processing unit 212 receives a mark detection signal from the mark detector 211 and also receives a feed encoder signal from the feed encoder 21-1, calculates a travel position from the feed encoder signal, and the travel position is the mark detection signal. The mask signal is output to the mark detector 211 from the position when the signal is input to the position advanced by a predetermined mask distance. Here, the predetermined mask distance is a distance that is not affected by the traveling speed of the material 6 and is set in advance according to the product length L.

  The mark detector 211 receives the mask signal from the mask processing unit 212 and ignores the input of the mark detection signal while inputting the mask signal (step S1402). The mask signal is used for ignoring the input of the mark detection signal when the mark sensor 16-1 detects an erroneous mark, and the mark detector 211 uses the mask signal to detect the mark sensor 16-1. The next mark detection signal is not input during a predetermined mark distance after the mark is detected and the mark detection signal is input. Further, the mark detector 211 inputs the plate cylinder position from the plate cylinder control unit 33-1, and inputs the plate cylinder position at the timing when the mark detection signal is inputted when the mask signal is not inputted, and then the mark detection signal. The actual product length RL is calculated using the difference between the plate cylinder position at the determined timing and the preset value when the product length L is converted into the plate cylinder position (step S1403). For example, when the difference between the plate cylinder position with respect to the product length L is set in advance and the difference between the actual product length RL and the plate cylinder position is proportional, based on the actually calculated difference between the plate cylinder positions. The actual product length RL is calculated. Then, the mark detector 211 outputs the actual product length RL to the VA-VC generation unit 220 and the VB generation unit 230 (step S1404).

  The mark detector 211 compares the input plate cylinder position with a preset rotation position setting value indicating the plate cylinder position when printing is completed. The actual product length RL is calculated and output at the timing. That is, the actual product length RL output by the mark detector 211 is updated at the timing of printing completion.

  As described above, the actual product length calculation unit 210 calculates the actual product length RL based on the input timing of the mark detection signal, the product length L, and the like. Accordingly, the VA-VC generation unit 220 and the VB generation unit 230 can generate the M2 speed command using the actual product length RL accompanying the expansion and contraction of the material 6. Therefore, even if expansion or contraction occurs due to the material 6 or the like, the travel speed of the material 6 is not affected by it, so that the printing position on the material 6 is accurately printed at a predetermined position without being shifted. Can do.

  Further, the actual product length calculation unit 210 calculates the actual product length RL at the timing of completion of printing, and outputs the actual product length RL to the VA-VC generation unit 220 and the VB generation unit 230. As a result, the VA-VC generation unit 220 and the VB generation unit 230 perform the presetting of the counter based on the latest actual product length RL when printing is not performed, and the M2 speed command for printing of the next product Can be generated. Therefore, printing can be performed with high accuracy from a preset print start position on the material 6.

[VA-VC generator]
Next, the VA-VC generation unit 220 of the feed control unit 34-1 illustrated in FIG. 9 will be described. As described above, the VA-VC generation unit 220 inputs the plate cylinder position, the feed encoder signal, the actual product length RL, and the like, calculates the reference speed command VA that is the rotation speed of the plate cylinder 13-1, and then determines the plate cylinder position. The printing completion is generated, and the actual product length RL is subtracted from the preset plate cylinder circumference B0, and the subtraction result, the subsequent plate cylinder position, the travel position of the material 6 indicated by the feed encoder signal, etc. Based on this, a material deviation speed command VC is calculated. The VA-VC generation unit 220 outputs the print completion to the VB generation unit 230, outputs the reference speed command VA-material deviation speed command VC to the selector 240, and calculates the rate R based on the reference speed command VA. And output to the VB generation unit 230.

  Referring to FIG. 9, the VA-VC generation unit 220 includes a varicam 221, an F / V filter 222, a subtractor 223, an adder / subtractor 224, a tuning side counter 225, a rate variable unit 226, an acceleration calculator 227, and a multiplier 228. And a subtractor 229.

  FIG. 15 is a flowchart for explaining processing of the VA-VC generation unit 220. The F / V filter 222 of the VA-VC generation unit 220 receives the plate cylinder position from the plate cylinder control unit 33-1 and uses a converter that converts a frequency into a voltage and a filter that removes a signal of a predetermined frequency (step S1501). ), A reference speed command VA which is the rotational speed of the plate cylinder 13-1 is generated based on the position of the plate cylinder 13 and is output to the subtractor 229, the rate variable unit 226, and the VB generation unit 230 (step S1502). The reference speed command VA corresponds to the reference speed command generated by the printing reference unit 32 and the M1 speed command generated by the plate cylinder control unit 33-1, and has the same value.

  The varicam 221 inputs the plate cylinder position from the plate cylinder control unit 33-1, compares the plate cylinder position with a preset rotational position setting value indicating the plate cylinder position when printing is completed, and when they match. The printing completion is determined (step S1503), and the printing completion is output to the tuning counter 225, the VB generation unit 230, and the selector 240.

  The subtractor 223 receives the actual product length RL from the actual product length calculation unit 210, subtracts the actual product length RL from a preset plate cylinder circumference B0, and adds and subtracts the subtraction result (B0-RL). Output to. The adder / subtractor 224 receives the subtraction result (B0-RL) from the subtractor 223, the feed encoder signal from the feed encoder 21-1, and the plate cylinder position from the plate cylinder control unit 33-1, respectively. -RL) is subtracted from the sum of the feed encoder signal and the addition / subtraction result is output to the tuning counter 225.

  The tuning counter 225 inputs the addition / subtraction result from the adder / subtractor 224 and also inputs the print completion from the variable cam 221. Then, the tuning counter 225 presets the inputted addition / subtraction result (B0-RL) as a count value at the timing when printing completion is inputted (step S1504). Thereafter, the tuning-side counter 225 subtracts the count value in accordance with the input of the plate cylinder position by the rotation of the plate cylinder 13-1 (step S1505), and the count value is input in accordance with the input of the feed encoder signal by the travel of the material 6. Addition (step S1506), and the addition / subtraction count value is output to the multiplier 228 as the material deviation speed command count value VC ′. That is, the tuning counter 225 presets B0-RL as a count value at the timing when printing completion is input, subtracts the count value with the subsequent input of the plate cylinder position, and counts with the input of the feed encoder signal. Add the values.

  The acceleration calculator 227 receives the actual product length RL from the actual product length calculation unit 210, and is preset with a preset product length L and a preset distance c between the start end of the product and the print start position. The acceleration is calculated from the print length a of the print α and the actual product length RL, and is output to the multiplier 228. For example, the actual print length is calculated from the relationship between the product length L and the actual product length RL and the print length a of the preset printing α, and the acceleration distance P0 = (actual product length RL−actual print length) / 2 is calculated. Then, the acceleration is calculated using the actual distance (acceleration distance P0) with respect to the distance c and the value of the constant speed during printing. Thereby, even if it is a case where the material 6 expands and contracts, the acceleration according to the expansion-contraction amount is computable.

  The rate variable unit 226 receives the reference speed command VA from the F / V filter 222 and sets a rate R for correcting the acceleration calculated by the acceleration calculator 227 according to the value of the input reference speed command VA. Output to the multiplier 228 and the VB generator 230. Specifically, the rate variable unit 226 sets the rate R to 1 when the reference speed command VA is the maximum value as the rotational speed of the plate cylinder 13-1, and sets the reference speed when the reference speed command VA is less than the maximum value. The rate R is set in the range of 0 to 1 in proportion to the value of the command VA.

The multiplier 228 inputs the material deviation speed command count value VC ′ from the tuning side counter 225, inputs acceleration from the acceleration calculator 227, and inputs rate R from the rate variable unit 226. The multiplier 228 multiplies the input acceleration by a gain for making the acceleration calculated in advance, multiplies the rate R according to the printing speed, and multiplies the result by the material deviation speed command count value VC ′. Then, the resulting material deviation speed command VC is output to the subtractor 229 (step S1507). For example, when the maximum frequency of the feed motor 20-1 (M2) at a constant speed during printing of the plate cylinder 13-1 is F0, the gain is set to the acceleration distance P0- (P0-Z / 2). Here, Z = √ ((P0 ² −4 ² −F0 ² ) / (4 × π ² × response frequency)).

  FIG. 22 is a timing chart for explaining the basic operation of the feed control unit 34-1. (1) is a reference speed command VA, (2) is a material deviation speed command VC, (3) is a tuning speed command VA-VC, (4) is a stop speed command VB, (5) is an M2 speed command, (6) Indicates completion of printing, and the horizontal axis indicates time.

  In (1), the reference speed command VA output by the F / V filter 222 is the rotational speed of the plate cylinder 13-1, and has a pattern of constant speed, acceleration and deceleration with respect to the time axis. In (2), the material deviation speed command VC is a command obtained by the multiplier 228 multiplying the material deviation speed command count value VC ′ output from the tuning side counter 225 by a gain or the like. Therefore, the material deviation speed command count value VC ′ also has the same pattern as the material deviation speed command VC. The material deviation speed command count value VC ′ is B0−RL at the completion timing of printing, and then gradually decreases to zero. The material deviation speed command VC is a value corresponding to B0-RL (a value obtained by multiplying a gain or the like in the multiplier 228) at the printing completion timing, and then gradually decreases to zero.

  Since the plate cylinder 13-1 rotates at a constant speed and acceleration, the plate cylinder position increases at a constant rate as time passes. Further, the travel position data based on the feed encoder signal is reduced with the passage of time after the printing is completed because the material 6 is decelerated after the printing is completed. Accordingly, the material deviation speed command count value VC ′ after completion of printing gradually decreases to 0 with B0-RL as the vertex, and remains 0 until the next printing completion is input. Similarly, as shown in FIG. 22 (2), the material deviation speed command VC gradually decreases and maintains 0 until the next print completion is input.

  9 and 15, the subtractor 229 receives the reference speed command VA from the F / V filter 222 and also receives the material deviation speed command VC from the multiplier 228, and the material deviation speed from the reference speed command VA. The command VC is subtracted, and the subtraction result tuning speed command VA-VC is output to the selector 240 (step S1508). The tuning speed command VA-VC, which is the subtraction result output from the subtractor 229, has the pattern shown in FIG. Here, in FIG. 22 (3), the area of the acceleration portion from time t0 to time t1 is the distance c shown in FIG. 20 ((L−a) / 2 in FIG. 22) due to the gain in the multiplier 228. ), And the area of the quadrangle from time t1 to time t2 is the distance a shown in FIG.

  As described above, in the printing unit 1, the VA-VC generation unit 220 presets B0-RL to the count value at the timing of printing completion, and counts as the plate cylinder 13-1 rotates and the material 6 travels. The tuning speed command VA-VC shown in FIG. 22 (3) is generated by using a tuning counter 225 that decreases the value and maintains 0, and a multiplier 228 that multiplies the count value by a gain or the like. did. Thereby, the acceleration and constant speed part of the M2 speed command can be generated.

[VB generator]
Next, the VB generation unit 230 of the feed control unit 34-1 illustrated in FIG. 9 will be described. As described above, the VB generation unit 230 inputs the actual product length RL, the feed encoder signal, the print completion, the rate R, and the like. When the printing is completed, the actual product length RL and the material 6 indicated by the subsequent feed encoder signal 6 The stop speed command VB is calculated based on the travel position and the like and output to the selector 240. With reference to FIG. 9, the VB generation unit 230 includes a stop distance calculator 231, a stop-side counter 232, a deceleration calculator 233, a multiplier 234, and a speed limiter 235.

  FIG. 16 is a flowchart for explaining processing of the VB generation unit 230. The stop distance calculator 231 receives the actual product length RL from the actual product length calculation unit 210, sets the preset product length L, the preset distance b from the product print end position to the end of the product, The actual stop distance is calculated from the preset print length a of the print α and the actual product length RL, and is output to the stop-side counter 232. For example, the stop distance calculator 231 calculates the actual print length from the relationship between the product length L and the actual product length RL and the preset print length a of the print α, and the stop distance = (actual product length RL−actual print). (Long) / 2 may be calculated. Thereby, even if it is a case where the material 6 expands and contracts, the stop distance according to the expansion-contraction amount is computable.

  The stop-side counter 232 inputs a stop distance from the stop distance calculator 231, and a feed encoder signal indicating the travel position of the material 6 from the feed encoder 21-1 and also inputs print completion from the VA-VC generation unit 220. (Step S1601). The stop-side counter 232 presets the stop distance to the count value at the timing when printing completion is input (step S1602), and subtracts the count value by the input of the feed encoder signal accompanying the travel of the material 6 (step S1603). The count value of the subtraction result is output to the multiplier 234 as the stop speed command count value VB ′.

  Returning to FIG. 9 and FIG. 16, the deceleration calculator 233 inputs the actual product length RL from the actual product length calculation unit 210, and sets the preset product length L and the position at which the material 6 starts to travel (the product A preset distance c from the start end) to the print start position, a preset print length a, a preset distance b from the print end position of the product to the end of the product, and the actual product length RL To calculate the deceleration and output to the multiplier 234. For example, the actual printing length is calculated from the relationship between the product length L and the actual product length RL, the deceleration distance = (actual product length RL−actual printing length) / 2 is calculated, the actual distance (deceleration distance) with respect to the distance b, and The deceleration is calculated using a constant speed value during printing. Thereby, even if it is a case where the material 6 expands and contracts, the deceleration according to the expansion-contraction amount is computable.

  The multiplier 234 inputs the stop speed command count value VB ′ from the stop side counter 232, inputs the deceleration from the deceleration calculator 233, and the rate R from the VA-VC generation unit 220. Then, the multiplier 234 multiplies the input deceleration by a gain for making a deceleration calculated in advance, and multiplies the rate R according to the printing speed, and the result is added to the stop speed command count value VB ′. Multiplication is performed, and the resulting stop speed command VB is output to the speed limiter 235.

  The speed limiter 235 inputs the stop speed command VB after multiplication from the multiplier 234 and also receives the reference speed command VA from the VA-VC generation unit 220 so that the stop speed command VB does not become larger than the reference speed command VA. Further, the speed limit is applied to the stop speed command VB, and the stop speed command VB after the speed limit process is output to the selector 240 (step S1604). Thereby, since the stop speed command VB can be limited to a command equal to or less than the reference speed command VA, it is possible to prevent the travel speed of the material 6 from changing suddenly at the timing of completion of printing. Therefore, since the material 6 is not accelerated suddenly and an extra load is not applied, the material 6 can be smoothly run.

  In FIG. 22 (4), the stop speed command VB is obtained by multiplying the stop speed command count value VB ′ output by the stop-side counter 232 by the multiplier 234 and the speed limiter 235 limiting the speed. This is the command obtained. The stop speed command count value VB ′ has the same pattern as the stop speed command VB. The stop speed command count value VB 'is a value corresponding to the stop distance at the timing of completion of printing, and then gradually decreases to zero. Similarly, the stop speed command VB is a value corresponding to the stop distance at the timing of completion of printing (a value obtained by applying a gain and a limit in the multiplier 234 and the speed limiter 235, resulting in VA as a result), and then gradually. Decrease to zero. Here, in FIG. 22 (4), the area of the deceleration portion from time t3 to time t4 (t0) is the distance b shown in FIG. 20 ((L−a in FIG. 22) by the gain in the multiplier 234. ) / 2).

  As described above, in the printing unit 1, according to the VB generation unit 230, the stop distance from the printing end position of the product to the end of the product is preset to the count value at the timing of the printing completion, and the material 6 travels. A stop-side counter 232 that decreases the count value and maintains 0, a multiplier 234 that multiplies the count value by a gain, and a speed that limits the speed so that the stop speed command VB does not become larger than the reference speed command VA. The stop speed command VB shown in FIG. 22 (4) is generated using the limiter 235. Thereby, the deceleration and stop part (only the deceleration part in this example) of the M2 speed command can be generated.

〔selector〕
Next, the selector 240 of the feed control unit 34-1 shown in FIG. 9 will be described. As described above, the selector 240 inputs the printing completion, the tuning speed command VA-VC, and the stop speed command VB, and uses the tuning speed command VA-VC or the stop speed command VB as the M2 speed command to the feed motor 20-1. Output.

  FIG. 10 is a block diagram showing the configuration of the selector 240. FIG. 17 is a flowchart for explaining the processing of the selector 240. The selector 240 includes a comparator 241, a latch circuit 242, and a switch 243. The selector 240 outputs the tuning speed command VA-VC as the M2 speed command when the tuning speed command VA-VC is larger than the stop speed command VB, and stops when the tuning speed command VA-VC is equal to or lower than the stop speed command VB. The speed command VB is output as the M2 speed command.

  The comparator 241 receives the tuning speed command VA-VC from the VA-VC generation unit 220 and the stop speed command VB from the VB generation unit 230, and outputs an ON control signal when VA-VC> VB. When VA−VC ≦ VB, an OFF control signal is output. The latch circuit 242 receives a control signal from the comparator 241, inputs printing completion from the VA-VC generation unit 220, and outputs a switching control signal to the switch 243. Specifically, when an ON control signal is input from the comparator 241, the latch circuit 242 sets an output and outputs an ON switching control signal. Further, when printing completion is input while the ON switching control signal is being output, the latch circuit 242 resets the output and outputs an OFF switching control signal.

  The switch 243 receives the tuning speed command VA-VC from the VA-VC generation unit 220, the stop speed command VB from the VB generation unit 230, and the switching control signal from the latch circuit 242. When printing completion is not input (step S1701) and VA-VC> VB (step S1703), the switching control signal is turned ON. The switch 243 outputs the tuning speed command VA-VC as the M2 speed command when the switching control signal is ON (step S1704). Further, when printing completion is input, the switching control signal is turned OFF, and the switch 243 outputs the stop speed command VB as the M2 speed command when the switching control signal is OFF (step S1702).

  In FIG. 22 (5), the M2 speed command is a command in which the tuning speed command VA-VC in (3) and the stop speed command VB in (4) are combined. The selector 240 shown in FIG. 10 inputs the tuning speed command VA-VC of FIG. 22 (3), the stop speed command VB of (4) and the completion of printing of (6), and performs the above-described processing ( 5) Output M2 speed command.

  In this way, in the printing unit 1, the selector 240 outputs the tuning speed command VA-VC as the M2 speed command between the predetermined position of the product and the printing end position of the printing α. Thus, the travel of the material 6 is accelerated to the same constant speed as that of the plate cylinder 13-1, and printing is started from the print start position of the product. Then, the selector 240 outputs the stop speed command VB as the M2 speed command from the printing end position to the predetermined position of the next product. Thereby, the travel of the material 6 is decelerated from the same constant speed as that of the plate cylinder 13-1 after the printing of the product is completed.

  As described above, according to the printing device 30 according to the embodiment of the present invention, the plate cylinder control units 33-1 to 33-3 in the printing unit control devices 31-1 to 31-3 for the printing units 1 to 3 are used. Generates the M1, M3, M5 speed commands based on the common reference position command and the reference speed command generated by the printing reference unit 32, and the plate cylinder 13- is generated by the plate cylinder motors 18-1 to 18-3. 1 to 13-3 was controlled to rotate at a constant speed, acceleration and deceleration pattern. The feed control units 34-1 to 34-3 perform printing α, β, and γ, the plate cylinder position calculated from the plate cylinder encoder signal, the travel position of the material 6 calculated from the feed encoder signal, M2, M4, M6 speed commands are generated based on the preset product length L, plate cylinder circumference B0, etc., and the material 6 is fed at a constant speed, deceleration and acceleration by the feed motors 20-1 to 20-3. The driving was controlled with a pattern. Thereby, when the plate cylinders 13-1 to 13-2 are rotated at a constant speed, printing α, β, γ can be performed from a predetermined position on the product in the material 6.

  Further, according to the printing apparatus 30 according to the present invention, on the premise of the control method for synchronizing the material 6 with the plate cylinders 13-1 to 13-3, the material 6 is applied to the plate cylinders 13-1 to 13-3 at the time of printing. Synchronize (follow) and run at the same speed as the reference speed of the plate cylinders 13-1 to 13-3, and at the time of non-printing, the plate cylinders 13-1 to 13-3 are accelerated and decelerated. Was decelerated and accelerated. Thereby, the blank time and blank distance between printing can be shortened, and the printing with respect to a product can be accelerated. Therefore, the production efficiency of the product by the printing apparatus 30 can be improved.

[Common printing unit control unit]
Next, a configuration example when the printing unit control devices 31-1 to 31-3 of the printing device 30 provided for each of the printing units 1 to 3 are shared will be described. FIG. 11 is a block diagram illustrating a configuration of a printing unit control device shared by the printing units 1 to 3. The printing unit controller 31 includes a printing reference unit 32, a plate cylinder control unit 33, a feed control unit 34, and a switch 35.

  The printing reference unit 32, the plate cylinder control unit 33, and the feed control unit 34 are the printing reference unit 32, plate cylinder control units 33-1, 33-2, and feed control units 34-1, 34 shown in FIGS. -2, the description is omitted here.

  The switch 35 inputs a reference position command and a reference speed command from the print reference unit 32, or inputs a reference position command and a reference speed command from another printing unit controller, and according to a preset selection signal, Either one of the commands on the printing reference unit 32 side or the other printing unit control device side is selected, and the selected reference position command and reference speed command are output to the plate cylinder control unit 33.

  In the example of the flexographic printing machine 10 illustrated in FIG. 2, the printing unit control device 31-1 includes the printing reference unit 32, and the printing unit control devices 31-2 and 31-3 do not include the printing reference unit 32. . Accordingly, the printing unit control device 31 used as the printing unit control device 31-1 outputs the reference position command and the reference speed command input from the printing reference unit 32 to the plate cylinder control unit 33 according to the selection signal. This is the same as the configuration shown in FIG. On the other hand, the printing unit control device 31 used as the printing unit control devices 31-2 and 31-3 has a reference signal input from another printing unit control device (printing unit control device 31-1) by a selection signal. The position command and the reference speed command are output to the plate cylinder control unit 33. This is the same as the configuration shown in FIG. That is, the selection signal is set in advance depending on whether or not the reference position command and the reference speed command output from the print reference unit 32 are used.

  As described above, according to the printing unit control device 31 shown in FIG. 11, the printing unit control device 31 is used as the printing unit control devices 31-1 to 31-3, and the printing unit control device 31-1 is used. , A selection signal is set so that a command from the printing reference unit 32 is output to the plate cylinder control unit 33. In the printing unit controllers 31-2 and 31-3, the other printing unit controllers 31 are set. The selection signal is set so that the command from -1 is output to the plate cylinder control unit 33. As a result, the printing unit control devices 31-1 to 31-3 can be shared. Therefore, the common printing unit control device 31 may be used every time the number of printing colors increases. Can be easily accommodated.

  The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical idea thereof. For example, in the above-described embodiment, an example of the flexographic printing machine 10 including the printing units 1 to 3 that perform three-color printing has been described. However, the present invention is not limited to the number of printing colors and the number of printing units. . For example, one-color printing or four-color printing may be used. When four-color printing is performed, the flexo printing machine 10 including four printing units may be used. Also in this case, the printing unit control device 31 is provided for each of the four printing units, and the printing reference unit 32 may be provided in one place in common.

1, 2, 3 Printing unit 4 Unwinding machine 5 Winding machine 6 Material 10 Flexo printing machine 11 Dancer 12 Imprint cylinder 13 Plate cylinder 14 Anilox roll 15 Feed 16 Mark sensor 17 Dryer 18 Plate cylinder motor 19 Plate cylinder encoder 20 Feed motor 21 Feed encoder 22 Plate 30 Printing device 31 Printing unit control device 32 Printing reference unit 33 Plate cylinder control unit 34 Feed control unit 35 Switch 101 Speed transmitter 102 Speed increasing circuit 103 Adding circuit 104 Angle conversion circuit 111 Position detector 112 Phase circuit 113 Subtractor 114 Multiplier 115 Position deviation limiter 116 Adder 210 Actual product length calculation unit 211 Mark detector 212 Mask processing unit 220 VA-VC generation unit 221 Varicam 222 F / V filter 223 Subtractor 224 Addition / subtraction 225 same Side counter 226 Rate variable device 227 Acceleration calculator 228 Multiplier 229 Subtractor 230 VB generator 231 Stop distance calculator 232 Stop side counter 233 Deceleration calculator 234 Multiplier 235 Speed limiter 240 Selector 241 Comparator 242 Latch circuit 243 Switching V A Reference speed command VB Stop speed command VC Material deviation speed command VA-VC Tuning speed command VB 'Stop speed command count value VC' Material deviation speed command count value B0 Plate cylinder circumference L Product length D Printing length RL Actual product length k2 Deviation R Rate

Claims (8)

In addition to controlling the traveling speed of the material, the rotational speed of the plate cylinder provided with the plate is controlled, and for each product in which the material is divided by a predetermined product length, printing is sequentially performed by the plate at a predetermined position of the product. In the printing device to perform
A reference speed command for rotating the plate cylinder in a pattern including a constant speed, acceleration and deceleration is generated based on a preset reference speed instruction and a speed increase instruction, and the plate is controlled based on the reference speed command. A printing reference section for generating a reference position command for determining a pattern of the rotational position of the cylinder;
A plate cylinder speed command is generated based on a reference speed command generated by the printing reference unit so that the plate cylinder rotates in a pattern of a reference position command generated by the printing reference unit, and the plate cylinder speed command A plate cylinder control unit for rotating the plate cylinder by:
For the period from the start to the end of printing for the product, the travel is performed at the same speed as the plate cylinder speed command, and for the period from the end of the printing to the start of printing for the next product, the travel of the material is decelerated. And generating a material speed command of a pattern of a traveling speed for accelerating and aligning a predetermined position of the next product with the plate, and a material control unit that causes the material to travel according to the material speed command ,
The printing reference part is
A speed increasing circuit for accelerating the plate cylinder at a time when the position indicated by the reference position command is a speed increasing position included in the speed increasing instruction, and then generating a pattern for constant speed and deceleration, or a pattern for subsequent deceleration;
A reference speed command for adding a pattern including acceleration and deceleration generated by the speed increasing circuit to a pattern of constant speed indicated by the reference speed instruction, and rotating the plate cylinder in a pattern including constant speed, acceleration and deceleration. An adder circuit to generate;
A conversion circuit that integrates the speed indicated by the reference speed command generated by the adder circuit and converts the speed into a position, and generates a reference position command that determines a pattern of the rotational position of the plate cylinder; Printing device. The printing apparatus according to claim 1 ,
The plate cylinder controller
A position detector for detecting a plate cylinder position indicating a rotational position of the plate cylinder;
A subtractor for calculating a difference between the position indicated by the reference position command generated by the printing reference unit and the plate cylinder position detected by the position detector, and outputting a plate position deviation;
A multiplier for multiplying a plate position deviation output by the subtractor by a preset gain and outputting a plate position deviation speed command;
An adder that adds the plate position deviation speed command output by the multiplier to the reference speed command generated by the printing reference unit and outputs the plate cylinder speed command. apparatus. In addition to controlling the traveling speed of the material, the rotational speed of the plate cylinder provided with the plate is controlled, and for each product in which the material is divided by a predetermined product length, printing is sequentially performed by the plate at a predetermined position of the product. In the printing device to perform
A reference speed command for rotating the plate cylinder in a pattern including a constant speed, acceleration and deceleration is generated based on a preset reference speed instruction and a speed increase instruction, and the plate is controlled based on the reference speed command. A printing reference section for generating a reference position command for determining a pattern of the rotational position of the cylinder;
A plate cylinder speed command is generated based on a reference speed command generated by the printing reference unit so that the plate cylinder rotates in a pattern of a reference position command generated by the printing reference unit, and the plate cylinder speed command A plate cylinder control unit for rotating the plate cylinder by:
For the period from the start to the end of printing for the product, the travel is performed at the same speed as the plate cylinder speed command, and for the period from the end of the printing to the start of printing for the next product, the travel of the material is decelerated. And generating a material speed command of a pattern of a traveling speed for accelerating and aligning a predetermined position of the next product with the plate, and a material control unit that causes the material to travel according to the material speed command,
The plate cylinder controller
A position detector for detecting a plate cylinder position indicating a rotational position of the plate cylinder;
A phase circuit for adding a preset phase correction value to the plate cylinder position detected by the position detector and outputting the corrected plate cylinder position ;
A subtractor for calculating a difference between the position indicated by the reference position command generated by the printing reference unit and the corrected plate cylinder position output by the phase circuit, and outputting a plate position deviation ;
A multiplier for multiplying a plate position deviation output by the subtractor by a preset gain and outputting a plate position deviation speed command;
An adder that adds the plate position deviation speed command output by the multiplier to the reference speed command generated by the printing reference unit and outputs the plate cylinder speed command. apparatus. The printing apparatus according to any one of claims 1 to 3 ,
The material control unit is
An actual product length calculation unit that inputs a mark detection signal from a mark sensor that detects a mark attached to a predetermined position for each product, and calculates an actual product length based on a timing at which the mark detection signal is input;
A reference speed command (VA) is generated based on a change in the plate cylinder position indicating the rotation position of the plate cylinder, and a predetermined plate cylinder circumference and an actual product length calculated by the actual product length calculation unit are generated. The difference between the two is calculated, the difference value is preset in a counter, and the counter subtracts the preset value as the plate cylinder rotates and the material travels as a count value. A corresponding material deviation speed command (VC) is generated, and a tuning speed command (VA-VC) is generated by subtracting the material deviation speed command (VC) from the reference speed command (VA) to generate a tuning speed command (VA-VC). ) Generator
A stop distance is calculated based on the actual product length calculated by the actual product length calculation unit and a preset print length, the calculated stop distance is preset in a counter, and the material travels by the counter. A stop speed command (VB) generating unit that generates a stop speed command (VB) according to the count value by using a result obtained by subtracting from the preset value as a count value.
The tuning speed command (VA-VC) generated by the tuning speed command (VA-VC) generation unit and the stop speed command (VB) generated by the stop speed command (VB) generation unit are switched and selected. And a selector for outputting the material speed command. In addition to controlling the traveling speed of the material, the rotational speed of the plate cylinder provided with the plate is controlled, and for each product in which the material is divided by a predetermined product length, printing is sequentially performed by the plate at a predetermined position of the product. In the printing device to perform
In order to perform multicolor printing, each color unit is equipped with a printing unit controller.
Among the plurality of printing unit controllers for each color, one printing unit controller is
A reference speed command for rotating the plate cylinder in a pattern including a constant speed, acceleration and deceleration is generated based on a preset reference speed instruction and a speed increase instruction, and the plate is controlled based on the reference speed command. A printing reference section for generating a reference position command for determining a pattern of the rotational position of the cylinder ;
A plate cylinder speed command is generated based on a reference speed command generated by the printing reference unit so that the plate cylinder rotates in a pattern of a reference position command generated by the printing reference unit, and the plate cylinder speed command A plate cylinder control unit for rotating the plate cylinder by :
For the period from the start to the end of printing for the product, the travel is performed at the same speed as the plate cylinder speed command, and for the period from the end of the printing to the start of printing for the next product, the travel of the material is decelerated. and accelerate to produce material velocity command of the running speed of the pattern for adjusting the predetermined position for the next product to the plate, and a material control unit for running the material by the material speed command,
Of the plurality of printing unit controllers for each color, the other printing unit controllers are:
A printing apparatus comprising the plate cylinder control unit and the material control unit. The printing apparatus according to any one of claims 1 to 4 , wherein
In order to perform multicolor printing, each color unit is equipped with a printing unit controller.
Of the plurality of printing unit controllers for each color, one printing unit controller includes the printing reference unit, the plate cylinder controller, and the material controller.
Of the plurality of printing unit controllers for each color, another printing unit controller includes the plate cylinder controller and the material controller. The printing apparatus according to claim 5 or 6,
The printing reference part is
When a portion between the first end and the last end of each of the print locations to be printed in the multicolor is a print portion, the print portion is rotated at a constant speed pattern with respect to the print portion, and the product portion other than the print portion And a reference speed command for generating a reference speed command for rotating in a pattern in which acceleration is started at a final end of the print portion. In addition to controlling the traveling speed of the material, the rotational speed of the plate cylinder provided with the plate is controlled, and for each product in which the material is divided by a predetermined product length, printing is sequentially performed by the plate at a predetermined position of the product. In the printing method to be performed,
Generating a reference speed command for rotating the plate cylinder in a pattern including a constant speed, acceleration and deceleration based on a preset reference speed instruction and an acceleration instruction;
Generating a reference position command for determining a pattern of a rotational position of the plate cylinder based on the reference speed command;
Generating a plate cylinder speed command based on the reference speed command so that the plate cylinder rotates in a pattern of the reference position command, and rotating the plate cylinder according to the plate cylinder speed command;
For the period from the start to the end of printing for the product, the travel is performed at the same speed as the plate cylinder speed command, and for the period from the end of the printing to the start of printing for the next product, the travel of the material is decelerated. and accelerate to produce a pattern material speed command running speed of for adjusting the predetermined position for the next product to the plate, have a, a step of moving the said material by said material velocity command,
The step of generating the reference speed command includes:
Generating a pattern for accelerating the plate cylinder when the position indicated by the reference position command is an acceleration position included in the acceleration instruction, and then decelerating at a constant speed and then decelerating;
Adding a pattern including acceleration and deceleration to a pattern of constant speed indicated by the reference speed instruction, and generating a reference speed command for rotating the plate cylinder in a pattern including constant speed, acceleration and deceleration. And
The step of generating the reference position command includes:
A printing method comprising: integrating a speed indicated by the reference speed command and converting it into a position, and generating a reference position command that defines a pattern of a rotational position of the plate cylinder .

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