KR20200110171A - Intermittent printing apparatus - Google Patents

Abstract

An intermittent printing machine where slip does not occur when the substrate to be printed is traveled and no deviation in print alignment occurs.
The substrate to be printed (W) is driven in the forward direction by synchronizing the step-back roller (6) on the receiving side and the step-back roller (10) on the discharge side to move in the forward direction, and the substrate to be printed (9) and the blanket copper (8) An image is printed on W), and the receiving-side step-back roller 6 and the discharge-side step-back roller 10 are synchronously driven in reverse rotation to drive the substrate W to be printed in the reverse direction. The substrate to be printed (W) is wound around the circumferential surface of the presser (9) at a predetermined winding angle, and the substrate to be printed (W) is pressed against the circumferential surface of the presser (9) with a nip roller 42 for pressing. In addition, the press drive 9 is driven in forward rotation and reverse rotation in synchronization with the step back roller 6 on the receiving side and the step back roller 10 on the discharge side.

Description

Intermittent printing machine{INTERMITTENT PRINTING APPARATUS}

The present invention relates to an intermittent printing machine.

The intermittent printing machine prints an image while running the substrate to be printed in the forward direction, and after printing, runs the substrate in the reverse direction without printing the image, and then travels in the forward direction to print the image on the substrate. It was designed to print with a small gap in the vertical direction.

For example, patent document 1 discloses an intermittent printing machine.

In this intermittent printing machine, a plurality of printing units are installed between two transfer rollers that are driven in forward rotation and reverse rotation, and the printing unit has a plate copper, a blanket copper, and a press copper. The circumferential surface of the blanket copper has a large diameter portion that is press-contacted with the circumferential surface of the platen copper and a small-diameter portion that is spaced apart from the circumferential surface of the platen copper.

Then, when the two conveying rollers are driven in a forward rotation to move the substrate to be printed in the forward direction, the large diameter portion of the blanket copper and the circumferential surface of the stamping copper are pressed to each other to print an image on the substrate to be printed. After printing the image, the two conveying rollers are driven in reverse rotation to move the substrate to be printed in the reverse direction. When the substrate to be printed runs in the reverse direction, the image is not printed because the substrate passes through the gap between the small diameter portion of the blanket copper and the circumferential surface of the press copper.

By repeating this operation, the image is printed on the substrate to be printed with a small vertical gap.

In this intermittent printing machine, when the substrate to be printed runs in the reverse direction, it passes through the gap between the small diameter portion of the blanket copper and the circumferential surface of the stamping copper, so that the substrate to be printed is not pinched by the pressing copper and the blanket copper, so that movement is not regulated.

For this reason, when the substrate to be printed runs in the reverse direction, deviation and sagging are liable to occur in the substrate to be printed. If deviation or sagging occurs in the substrate to be printed, damage to the substrate to be printed due to the contact of the substrate to the blanket copper or the pressure copper, and printing contamination may occur.

An intermittent printing machine for solving this problem is disclosed in Patent Document 2.

In this intermittent printing machine, by installing two guide rollers, the substrate to be printed is wound around the circumferential surface of the presser at a predetermined winding angle, and the presser is driven in forward rotation and reverse rotation in synchronization with the two transfer rollers.

According to this intermittent printing machine, since the substrate to be printed is wound around the circumferential surface of the press copper, movement of the substrate to be printed is regulated when the substrate to be printed runs in the reverse direction. Therefore, when the substrate to be printed runs in the reverse direction, no deviation or sagging occurs in the substrate to be printed.

Japanese Patent Application Laid-Open No. Hei 2-75561 Japanese Patent Application Laid-Open No. 2006-247869

As disclosed in Patent Literature 2, as a result of printing a substrate to be printed on a circumferential surface of a presser and printing the presser with an intermittent printing machine that drives forward rotation and reverse rotation, there is a case where a deviation in print alignment occurs. In particular, when a substrate to be printed with high surface smoothness and a film as a substrate to be printed was printed using a film, there was a remarkable variation in print alignment.

As a result of investigating the cause of the occurrence of the deviation of the print alignment, the present inventor found out the following and came to the present invention.

Since the substrate to be printed is wound around the circumferential surface of the presser, it is difficult to slide the substrate to be printed on the circumferential surface of the presser, so that the presser is driven forward rotation and reverse rotation in synchronization with the transfer roller. The substrate to be printed is running in the forward and reverse directions.

For this reason, when the substrate to be printed runs in the reverse direction or when the direction is changed, the circumferential surface of the press copper and the small diameter part of the blanket copper are separated, and the substrate to be printed is in contact with the small diameter part of the blanket copper between the circumferential surface and the printed substrate. Since the substrate to be printed travels only with the generated frictional force, slip may occur between the circumferential surface of the pressure cylinder and the substrate to be printed when the frictional force is small.

If slip occurs between the circumferential surface of the press copper and the substrate to be printed, the position at which the tip of the rotational direction of the large diameter portion of the blanket copper starts contacting the substrate when printing the image by running the substrate in the forward direction is vertical. Because it is misaligned, the print alignment is misaligned.

And because the slip length is not constant and there are variations, variations in print alignment occur.

In the case of printing using a substrate having a high surface smoothness, slip is likely to occur between the substrate and the circumferential surface of the press copper, and thus the deviation of printing alignment occurs remarkably.

In the case of using a film as a substrate to be printed, the density of the film is high and air does not pass through. Therefore, the air remaining between the circumferential surface of the pressure copper and the film cannot escape from the surface of the film through the film. Can't.

Further, when the rotational speed of the press copper (travel speed of the substrate to be printed) increases, air may be drawn between the circumferential surface of the press copper and the film to form an air layer.

In this respect, when the film is used as a substrate to be printed, the friction between the circumferential surface of the pressure copper and the film is small, so that slip is likely to occur, and thus the deviation of printing alignment occurs remarkably.

The present invention has been made to solve the above problems, and its object is an intermittent printer in which no slip occurs between the circumferential surface of the presser and the substrate to be printed when the substrate to be printed is driven, and no deviation in print alignment occurs. Is to provide.

The intermittent printing apparatus of the present invention includes a printing unit having a location unit for discharging a substrate to be printed, a plurality of printing units for printing an image on the substrate to be printed out from the location unit, and a discharge unit for discharging the substrate on which the image is printed. And,

The location unit has a location-side shock absorber for storing the printed material in a loop shape, and a location-side step-back roller driven in a forward rotation driving the printed material in a forward direction and a reverse rotation driving the printed material in a reverse direction,

The printing unit has a presser, a blanket copper having an image range in contact with the circumferential surface of the presser, and a non-image range not in contact with the circumferential surface of the presser,

The delivery unit includes a forward rotation drive for driving the substrate to be printed in a forward direction and a stepback roller on the discharge side that is driven in reverse rotation for driving the substrate to be printed in a reverse direction, and a discharge side buffer that stores the printed material on which the image is printed in a loop shape. Have a device,

By synchronously driving the positioning-side step-back roller and the discharge-side step-back roller to rotate forward, the substrate to be printed is driven in a forward direction, and an image is printed on the substrate to be printed in the image range of the circumferential surface of the pressing copper and the blanket copper. In an intermittent printer, a substrate to be printed passes through a gap between the circumferential surface of the pressing copper and the non-image range of the blanket copper by moving in a reverse rotation in synchronization with the step-back roller on the receiving side and the step-back roller on the discharge side to travel in the reverse direction. In,

A mounting side guide roller and a discharge side guide roller are installed to wind the substrate to be printed passing between the circumferential surface of the press copper and the blanket copper at a predetermined winding angle on the circumferential surface of the press copper,

Installing a nip roller for pressing the substrate to be printed wound around the circumferential surface of the pressing copper to the circumferential surface of the pressing copper,

When the substrate to be printed is driven in the forward direction, the presser is driven in a forward rotation in synchronization with the stepback roller on the positioning side and the stepback roller on the discharge side. A reverse rotation drive in synchronization with the roller and the step back roller on the discharge side,

A drying device for drying the substrate to be printed wound around the circumferential surface of the pressure copper, and a cooling device for the pressure copper cooling the pressure copper,

The drying device is an intermittent printing machine, characterized in that it is located upstream of the pressing nip roller in a positive rotation direction.

In the intermittent printing machine of the present invention, the positioning-side guide roller and the discharge-side guide roller include an extension line of the positioning-side running path between the positioning-side guide roller and the platen, and a discharge side between the discharge-side guide roller and the platen. It is installed so that the extension line of the running path crosses.

According to this intermittent printing machine, the winding angle of the printed material wound around the circumferential surface of the press copper can be made 180 degrees or more, and the friction between the circumferential surface of the press copper and the printed material is large, so that slip can be reliably prevented. have.

In the intermittent printing machine of the present invention, when the blanket copper is rotated in an image range from the printing start position and an image is printed on a substrate to be printed, the press copper is driven to rotate forward at the same constant speed as the blanket copper, and the press copper is printed by the blanket copper. When rotating in the non-image range from the end position, rotation is stopped by deceleration forward rotation drive from the constant speed, acceleration reverse rotation drive up to a predetermined reverse rotation drive speed after rotation stop, and deceleration reverse rotation drive from the predetermined reverse rotation drive speed. Then, the rotation was stopped, and after the rotation was stopped, an accelerated forward rotation was driven to the constant speed so that the rear end of the printed image printed on the substrate to be printed and the front end of the print range of the blanket wing were in contact.

According to this intermittent printing machine, since the platen gradually stops rotating and starts to rotate gradually, the occurrence of slip between the substrate to be printed and the circumferential surface of the platen is prevented, and there is no failure or the like in the drive system of the platen.

In the intermittent printing machine of the present invention, the curve representing the change in the rotational drive speed ratio of the decelerated forward rotation drive of the press copper and the curve representing the change in the rotation drive speed ratio of the accelerated forward rotation drive are linearly symmetric, and the accelerated reverse rotation of the pressure copper The curve representing the change in the rotational drive speed ratio of the drive and the curve representing the change in the rotational drive speed ratio of the decelerated reverse rotation are linearly symmetric, and the rotational drive speed from the constant speed of the pressure motion to the predetermined reverse rotation drive speed The ratio and the rotational driving speed ratio from the predetermined reverse rotational driving speed to the constant speed were made to change smoothly along an approximately U-shaped curve.

According to this intermittent printing machine, the pressure copper smoothly changes in speed, and the substrate to be printed smoothly changes directions in the reverse and forward directions to prevent the occurrence of slip between the substrate to be printed and the circumferential surface of the pressure copper. Can be printed.

In the intermittent printing machine of the present invention, an alignment adjustment device is provided between each of the printing units, and the alignment adjustment device is configured to adjust the printing alignment by changing the length of the traveling path of the substrate to be printed between the printing units.

According to this intermittent printing machine, since the print alignment before printing is adjusted by changing the length of the running path between the printing units, the printing alignment can be adjusted while the substrate to be printed is wound around the circumferential surface of the press copper.

In the intermittent printing machine of the present invention, the alignment adjustment device includes a receiving side pull roller, a discharge side pull roller, and a movable roller, and by moving the movable roller, the running path between the receiving side pull roller and the discharge side pull roller is The length is changed, and both of the pull rollers are synchronized with the step-back roller on the receiving side and the step-back roller on the discharge side to drive the printed material in the forward direction and the reverse rotation to run the printed material in the reverse direction. There are provided nip rollers for pull rollers that are driven and press down the printed substrate wound around the circumferential surfaces of both pull rollers to the circumferential surfaces of both pull rollers.

According to this intermittent printing machine, there is no slip between the circumferential surface of the receiving side pull roller and the substrate to be printed, and no slip occurs between the circumferential surface of the discharge side pull roller and the substrate to be printed. There is no deviation in print alignment.

In the intermittent printing machine of the present invention, the rotational speed of the positioning-side stepback roller, the rotational speed of the discharge-side stepback roller, the rotational speed of the pressing of each printing unit, and the rotational speed of the positioning-side full roller of each of the alignment adjustment devices , The rotation speed of the discharge side pull roller was separately controlled.

According to this intermittent printing machine, the tension of the substrate to be printed can be adjusted for each printing unit.

In the intermittent printing machine of the present invention, at least two pull rollers with the substrate to be printed are installed on the running path of the substrate to be printed between the printing units, and the pull rollers are the step-back roller on the positioning side and the step-back roller on the discharge side. In synchronization with, a forward rotation drive for driving the substrate to be printed in a forward direction and a reverse rotation drive for driving the substrate to be printed in a reverse direction, and the printed substrate wound around the circumferential surface of each of the pull rollers Nip rollers for pull rollers are installed on the surface.

According to this intermittent printing machine, deviation or sagging does not occur in the substrate to be printed that travels on the traveling path between the printing units.

In addition, the frictional force between the circumferential surface of the pull roller and the substrate to be printed increases, so that slip does not occur between the two, so that there is no deviation in printing alignment by installing the pull roller.

In the intermittent printing machine of the present invention, the substrate to be printed may be a film.

According to this intermittent printing machine, it is possible to print an image on a film without causing any deviation in print alignment.

According to the intermittent printing machine of the present invention, since slip does not occur between the circumferential surface of the presser and the substrate to be printed when the substrate to be printed is running, there is no deviation in print alignment.

Since the ink of the image printed on the substrate to be printed is fixed and dried by a drying device, there is no image distraction due to contact with the press-rolling nip roller, and there is no staining due to the adhesion of ink to the press-rolling nip roller.

Since the plated copper is cooled by a cooling device, there is no high temperature of the plated copper or the substrate to be printed.

The location-side shock absorber and the discharge-side shock absorber can store the printed material in a loop shape, so that the printed material can run smoothly in the forward and reverse directions.

1 is an overall front view of an intermittent printing machine according to an embodiment of the present invention.
FIG. 2 is an enlarged front view of a feeding part and a location part of the intermittent printing machine shown in FIG. 1.
3 is an enlarged front view of a discharging unit and a post-processing unit of the intermittent printing machine shown in Fig. 1.
4 is an enlarged front view of two printing units of the intermittent printer shown in FIG. 1.
Fig. 5 is an explanatory diagram of the configuration of a printing plate, a blanket copper, and a pressing copper plate.
Fig. 6 is a diagram illustrating the operation from the start of printing to the end of printing at the time of first printing of the printing unit.
Fig. 7 is a diagram illustrating the operation of the printing unit from the first end of printing to the start of the second printing.
Fig. 8 is a diagram for explaining the operation from the start of printing to the end of printing of the second printing.
9 is a chart showing the rotation angle and rotational drive speed ratio of the press copper to the rotation angle of the blanket copper.
10 is a diagram showing a change in the rotational drive speed of the pressure copper.
11 is an explanatory diagram of a printing unit equipped with a short-sized blanket.
Fig. 12 is a chart showing the rotation angle and the rotational drive speed ratio of the press copper to the rotation angle of the blanket copper.
13 is an explanatory view of a printing unit equipped with a long-sized blanket.
Fig. 14 is a chart showing the rotation angle and rotational drive speed ratio of the press copper to the rotation angle of the blanket copper.
Fig. 15 is an enlarged front view of the pressing portion of the printing unit shown in Fig. 4;
16 is a front view of a mounting portion of the nip roller for pressing shown in FIG. 4.
17 is an AA cross-sectional view of a mounting portion of the nip roller for pressing shown in FIG. 16.
Fig. 18 is a front view of the mounting portion of the pressure copper shown in Fig. 4;
FIG. 19 is a cross-sectional view taken along BB of the mounting portion of the pressure copper shown in FIG. 18.
Fig. 20 is an enlarged front view of the alignment adjustment device shown in Fig. 4;
FIG. 21 is a cross-sectional view taken along a line CC of the adjusting device shown in FIG. 20.
22 is an explanatory diagram of tension adjustment of a substrate to be printed in each printing unit.
Fig. 23 is a front view showing another embodiment of a running path of a substrate to be printed between printing units.

The basic configuration of the entire intermittent printer of the present invention will be described based on FIG. 1. 1 is an overall front view of an intermittent printing machine according to an embodiment of the present invention.

The intermittent printer 100 includes a paper feed unit 1A for feeding the substrate to be printed (W), a positioning unit 1B for discharging the printed substrate W fed from the paper feed unit 1A, and the mounting unit 1B. A printing unit 2 for printing an image on the sent substrate W, and a delivery unit 3A for discharging the printed substrate W (hereinafter simply referred to as a printed substrate W) on which the image has been printed. ), and a post-processing unit 3B for post-processing the substrate W to be printed.

The substrate to be printed (W) used in the intermittent printing machine 100 of this embodiment is a film having high surface smoothness and flexibility. For example, flexible packaging materials are used.

In general, flexible packaging refers to a packaging material composed of a material with high flexibility, and is a generic term for packaging in which a thin flexible material such as polypropylene (PP) or polyethylene (PE) is used alone or attached.

Since these are film materials, they have higher surface smoothness and flexibility than paper. In addition, a film-method composite is also used as the same substrate (W) to be printed.

In the embodiment of the present invention, the paper-feeding unit 1A is a paper-feeding device 4, which will be described later in detail, for feeding the substrate W to be printed.

The location unit 1B includes a location-side buffer 5 for storing the printed material W fed from the paper feeding device 4 in a loop shape, and the printed material W stored in the location-side buffer 5 It has a step-back roller 6 on the ground side for running.

The printing unit 2 has a plurality of printing units. For example, a first printing unit 2a printing using black (K) color ink, a second printing unit 2b printing using cyan (C) color ink, and magenta (M) A third printing unit 2c that prints using ink of a color of ), a fourth printing unit 2d that prints using ink of a color of yellow (Y), and a fifth printing unit that performs white printing. It has 6 printing units, the printing unit 2e and the sixth printing unit 2f.

In addition, in the first to fourth printing units 2a to 2d, color printing of a different color is performed on the substrate W to be printed.

After this color printing, the fifth and sixth printing units 2e and 2f perform white printing on the substrate W to be printed.

Color printing is visually recognized from the side through the substrate W to be printed on the side opposite to the printing surface side. Pure white is used as a background color to improve the visibility of color printing.

As described above, the printing unit 2 has 6 printing units 2a, 2b, 2c, 2d, 2e, 2f, so it is a step compared to an intermittent printing machine having 4 printing units like the printing unit shown in Patent Document 2 The length of the running path of the substrate W between the back rollers (the distance from the step-back roller 6 on the entry side to the step-back roller 10 on the discharge side to be described later) is long, so that a deviation in printing alignment is likely to occur.

The structure of the six printing units 2a, 2b, 2c, 2d, 2e, 2f is the same, and has three coppers: plate copper 7, blanket copper 8, and press copper 9.

The discharge unit 3A is a discharge-side buffer device that stores the printed material W driven by the discharge-side step-back roller 10 and the discharge-side step-back roller 10 in a loop shape. (11), an automatic alignment device 38 and a monitoring device 39 to be described later are provided.

In the embodiment of the present invention, the post-processing unit 3B is a take-up device 12 for winding the substrate W stored in the discharge side buffer 11.

The basic printing operation of this intermittent printer is as follows.

In the state where the substrate to be printed (W) is stored in the shape of a loop by the location-side buffer (5) and the discharge-side buffer (11), the location-side stepback roller (6) and the delivery-side stepback roller (10) are synchronized. Then, it is driven in a forward rotation, and an image is printed while running the substrate W to be printed in the forward direction (direction from the mounting portion 1B toward the discharge portion 3A).

After printing, the receiving-side stepback roller 6 and the discharge-side stepback roller 10 are synchronously driven in reverse rotation, and the substrate to be printed (W) is reversed (from the discharging unit 3A to the receiving unit 1B). Direction) and adjust the position in the vertical direction so that the rear end of the printed image becomes the next printing start position, the receiving side step back roller 6 and the discharge side step back roller 10 are driven to rotate forward and the substrate to be printed The image is printed while running (W) in the forward direction. This operation is repeated to print the image on the substrate W to be printed with a small vertical gap. That is, the basic printing operation is the same as the conventional intermittent printing machine.

As shown in FIG. 2, the paper feed device 4 is configured to input and discharge a feed shaft 20 on which a substrate to be printed (W) wound in a roll shape is mounted, and a substrate to be printed (W) mounted on the feed shaft 20. It has a conveying roller 21, a corona treatment device 24, a tension detection device 25, and a meandering prevention device 26, as will be described later in detail. That is, the paper feed device 4 is from the feed shaft 20 to the feed roller 21.

A powder brake, not shown, is connected to the feed shaft 20 to provide rotational resistance to the feed shaft 20.

The substrate W input from the feed shaft 20 is wound around the circumferential surface of the transfer roller 21. A drive motor (not shown) is connected to the transfer roller 21, and the drive motor rotates the transfer roller 21 only in the direction in which the substrate to be printed W is sent out (clockwise in FIG. 2).

The conveying roller 21 does not rotate in a direction opposite to the delivery direction (counterclockwise in FIG. 2).

At least one nip roller 22 is in pressure contact with the circumferential surface of the transfer roller 21. The substrate to be printed (W) is held between the nip roller (22) and the feed roller (21), and the feed roller (21) is rotated with a drive motor to pull the substrate to be printed (W), and the feed shaft (20) By rotating the roll-shaped substrate (W) to be printed so that it can be reliably discharged toward the location-side buffer (5). The nip roller 22 is press-contacted within a range in which the substrate to be printed W is wound on the circumferential surface of the transfer roller 21.

When the substrate to be printed (W) is input, the feed shaft (20) rotates, but since rotational resistance is given to the feed shaft (20) by a powder brake, the amount of rotational resistance (brake force) is applied to the substrate to be printed (W). The right value of tension (tension) occurs.

A corona treatment device 24, a tension detection device 25, and a meandering prevention device 26 are installed in the running path 23 of the substrate W from the feed shaft 20 to the transfer roller 21. .

The corona treatment apparatus 24 performs corona treatment on the surface of the substrate W to be printed. By performing the corona treatment, the surface of the substrate to be printed W is modified, and the fixability of the ink to the substrate W is improved. The substrate to be printed (W) used in this embodiment is a material for flexible packaging such as a film, and is preferably subjected to corona treatment because the fixability of ink is poor compared to paper.

The tension detecting device 25 detects the tension of the substrate to be printed W input from the feeding shaft 20. The detected tension value is compared with the set tension value by a controller (not shown). The control unit adjusts the brake force of the powder brake so that the detected tension value and the set tension value coincide so that the substrate to be printed (W) can always be input at the set tension value.

The meandering prevention device 26 detects the position of the substrate W in the width direction, and if it deviates from the predetermined position, moves the substrate W in the width direction to set the position in the width direction. . This prevents displacement of the substrate W in the width direction. The width direction of the substrate W is a direction perpendicular to the input direction.

As shown in Fig. 2, the location-side shock absorber 5 has an upward concave portion 5a such as a box with an open upper portion, and a suction device (not shown) that sucks air in the upward concave portion 5a. By suctioning air in the upward concave portion 5a with a suction device, the printed material W is absorbed in the upward concave portion 5a and stored in a loop shape. The suction force of the suction device is controlled to become a tension at which the substrate to be printed W stored in the upward concave portion 5a does not meander.

In addition, the transfer roller 21 rotates according to the output of a sensor (not shown) mounted on the shock absorber 5 so that the length of the printed material W stored in the upward concave part 5a falls within a predetermined range. Control the speed.

As shown in FIG. 2, the step-back roller 6 on the ground side has two drive rollers 27 that are driven in forward rotation and reverse rotation with a drive motor not shown, and are in pressure contact with the circumferential surfaces of each drive roller 27. It has at least two nip rollers 28. The two driving rollers 27 are installed to be spaced apart in the vertical direction.

The substrate to be printed (W) was wound and driven to have an inverted S shape across the two driving rollers (27), and the substrate to be printed (W) was pinched by each driving roller (27) and nip roller (28). have. The two nip rollers 28 are in pressure contact at positions spaced apart in the rotational direction within the range in which the substrate W is wound on the circumferential surface of the drive roller 27.

Therefore, by driving the drive roller 27 forward rotation and reverse rotation, the substrate W can be reliably driven in the forward and reverse directions.

In this embodiment, the paper-feeding unit 1A (paper-feeding device 4) and the paper-feeding unit 1B (position-side shock absorber 5 and position-side step-back roller 6) are used as one unit, but limited to this. Is not.

For example, the paper feed unit 1A (paper feed unit 4) is used as one unit, and the positioning unit 1B (position side shock absorber 5 and the position side stepback roller 6) as another unit. You can do it. In this case, it is preferable to install a conveying roller on the feeding side of the loading side buffer device 5. That is, in the paper-feeding unit 1A and the paper-feeding unit 1B shown in FIG. 2, the transfer roller 21 of the paper-feeding device 4 also serves as the transfer roller of the paper-feeding device 5.

As shown in FIG. 3, the step-back roller 10 on the discharge side is in pressure contact with the circumferential surfaces of the two driving rollers 30, which are driven in forward rotation and reverse rotation by a driving motor not shown. It has at least two nip rollers 31. The two driving rollers 30 are installed to be spaced apart in the vertical direction.

The substrate to be printed (W) was wound up to form an S shape across two drive rollers (30) to run, and the substrate to be printed (W) is sandwiched by each of the drive rollers (30) and nip rollers (31). . The two nip rollers 31 are press-contacted at positions spaced apart in the rotational direction within the range in which the substrate W is wound on the circumferential surface of the driving roller 30.

Accordingly, by driving the driving roller 30 forward rotation and reverse rotation, the substrate W can be reliably driven in the forward and reverse directions.

The discharge side stepback roller 10 (driving roller 30) and the receiving side stepback roller 6 (driving roller 27) are synchronously driven forward rotation and reverse rotation.

The discharge-side shock absorber 11 includes an upward concave portion 11a such as a box with an open top, a suction device (not shown) that sucks air in the upward concave portion 11a, and a substrate to be printed (W). It has a conveying roller 33 that is sent to the processing part 3B, and by suctioning air in the upward concave part 11a with this suction device, the substrate to be printed (W) is absorbed in the upward concave part 11a and stored in a loop shape. do.

The suction force of the suction device is controlled to become a tension at which the printed substrate W stored in the upward concave portion 11a does not meander.

And the rotation of the transfer roller 33 according to the output of a sensor (not shown) mounted on the shock absorber 11 so that the length of the printed material W stored in the upward concave portion 11a falls within a predetermined range. Control the speed.

The substrate to be printed W input from the discharge side buffer 11 is wound around the circumferential surface of the transfer roller 33. A drive motor (not shown) is connected to the transfer roller 33, and the drive motor rotates only in a direction (clockwise in Fig. 3) to send the printed material (W) toward the post-processing unit 3B, and the post-processing unit It does not rotate in the direction (counterclockwise in Fig. 3) directed toward the opposite direction of (3B).

At least two nip rollers 34 are in pressure contact with the circumferential surface of the feed roller 33. The substrate to be printed (W) is held between the nip roller (34) and the transfer roller (33), and the substrate to be printed (W) is pulled by rotating the transfer roller (33) with a driving motor to remove the post-processing unit (3B). It was made to be able to send it clearly.

The two nip rollers 34 are in pressure contact with a position separated from the circumferential surface of the conveying roller 33 in the rotational direction of the range in which the substrate W is wound.

An automatic alignment device for detecting the deviation of printing alignment on the running path 37 of the substrate W to be printed between the discharge side stepback roller 10 and the printing unit 2 (6th printing unit 2f). 38 and a monitoring device 39 are installed. The automatic alignment device 38 is located on the side of the printing unit 2, and the monitoring device 39 is located on the side of the stepback roller 10 on the discharge side.

The automatic alignment device 38 reads the dots printed on the substrate W with each printing unit 2a to 2f, and measures the pitch between the dots to detect the misalignment of the print alignment of each printing unit 2a to 2f. Find and perform fine adjustment of print alignment during the printing operation. Fine adjustment of the print registration by the automatic alignment device 38 is performed by automatically controlling each of the printing units 2a to 2f based on information of the printer set in advance.

The monitoring device 39 has a camera unit 39a for photographing an image printed on the substrate W to be printed, and a monitor (not shown) that displays the photographed image as an image.

The alignment mark of each color printed on the substrate W to be printed by each of the printing units 2a to 2f is photographed by the camera unit 39a, and is displayed as an image on the monitor. By viewing the image on the monitor, the operator can see which printing unit is out of alignment in the vertical direction and in the width direction, so that the operator can correct the misalignment in the vertical printing alignment and the printing alignment in the width direction. It is possible to perform the correction of

The printing alignment in the vertical direction and the printing alignment in the width direction are one driving motor (not shown) that rotates the plate copper 7 and the blanket copper 8 shown in FIG. 1 and moves the plate copper 7 in the width direction. It is configured to be adjusted by driving a drive motor (not shown).

Therefore, by automatically controlling each driving motor by the automatic alignment device 38 and the result of the monitoring device 39, the operator controls each driving motor to adjust the printing alignment in the vertical direction and the printing alignment in the width direction. have.

As shown in FIG. 3, the take-up device 12 has a take-up shaft 32 for winding the substrate W to be printed, and a tension detection device 36 to be described later.

A drive motor (not shown) is connected to one end of the take-up shaft 32, and the drive motor rotates only in the direction in which the substrate to be printed (W) is wound (clockwise in FIG. 3), and the direction opposite to the winding direction (FIG. 3) counterclockwise).

A tension detection device for detecting the tension of the substrate to be printed (W) traveling on the traveling path (35) on the traveling path (35) of the substrate (W) from the conveying roller (33) to the winding shaft (32) ( 36) is installed.

The tension value detected by the tension detection device 36 is compared with the tension value set by a control unit (not shown), and the rotation speed of the take-up shaft 32 and the feed roller 33 is controlled so that the detected tension value becomes the set tension value. .

That is, by increasing the rotational speed of the take-up shaft 32 faster than the rotational speed of the transfer roller 33, tension is generated in the substrate to be printed (W) traveling on the traveling path 35, and the magnitude of the tension is determined by the transfer roller ( Since it is determined by the difference in rotational speed between 33) and the take-up shaft 32, the difference in rotational speed is changed to match the detected tension value with the set tension value.

The post-treatment part 3B is not limited to the take-up device 12.

For example, a processing device that processes the substrate to be printed W, a unit that conveys the substrate to be printed W to another device installed on the downstream side, a delivery unit, and the like can be used as the post-processing unit 3B.

The printing units 2a to 2f will be described based on FIG. 4. FIG. 4 is an enlarged front view of two printing units 2a and 2b of the intermittent printing machine shown in FIG. 1.

The plate copper 7, the blanket copper 8, the pressure copper 9, and each member to be described later are respectively installed in the machine frame 2A of the printing unit. However, for ease of understanding, each copper and each member are shown in solid lines. Shown.

The plate copper 7 and the blanket copper 8 are rotated in the opposite direction (in the direction of the arrow in Fig. 4) in synchronization with a single drive motor (not shown).

The pressing member 9 is a driving motor for pressing, which will be described later, and is driven in forward rotation and reverse rotation in synchronization with the step-back roller 6 on the receiving side and the step-back roller 10 on the discharge side.

The configuration of the plate copper 7, the blanket copper 8, and the pressing copper 9 will be described based on FIG. 5.

As shown in Fig. 5, a chain plate 7a shorter than the total circumferential length of the plate cylinder 7 (length in the circumferential direction) of the plate cylinder 7 is attached to the circumferential surface of the plate cylinder 7. Ink is supplied to the printing plate 7a of the plate cylinder 7 from an ink supply device (not shown) provided adjacent to the plate cylinder 7.

A blanket 8a shorter than the total circumference of the blanket copper 8 is attached to the peripheral surface of the blanket copper 8.

The plate copper 7 and the blanket copper 8 are configured such that the printing plate 7a and the blanket 8a come into contact with each other, and the image of the printing plate 7a is transferred to the blanket 8a, as shown in Fig. 5A. . The portion of the circumferential surface of the plate copper 7 to which the chain plate 7a is not attached and the blanket 8a of the blanket copper 8 do not contact.

As shown in Fig. 5B, the blanket copper 8 and the platen copper 9 contact the blanket 8a and the circumferential surface of the platen 9 through the substrate W to be in contact with the blanket 8a. It is configured so that the image is printed on the substrate W to be printed. That is, the blanket 8a is the image range of the blanket copper 8.

As shown in FIG. 5C, the peripheral surface portion of the blanket copper 8 to which the blanket 8a is not attached does not come into contact with the peripheral surface of the press copper 9. That is, a portion of the circumferential surface of the blanket copper 8 to which the blanket 8a is not attached is a non-image range of the blanket copper 8.

The intermittent printing operation of the intermittent printing machine 100 according to the embodiment of the present invention will be described with reference to FIGS. 6, 7 and 8.

In the embodiment, the length of the circumference of the plate copper 7, the length of the circumference of the blanket copper 8, and the circumference of the plate copper 9 are the same.

Plate copper (7) and blanket copper (8) are continuous at the same speed in opposite directions (the plate copper (7) is clockwise and the blanket copper (8) is counterclockwise) as indicated by the solid line arrows during the intermittent printing operation. So it is rotated.

As indicated by a solid line arrow, the presser 9 rotates in a clockwise direction, that is, drives in a forward rotation to drive the substrate W in the forward direction as indicated by a solid line arrow, and in a counterclockwise rotation direction as indicated by a dotted line arrow. By rotating, that is, driving in reverse rotation, the substrate W is driven in the reverse direction as indicated by the dotted arrow. At this time, the step-back roller 6 on the receiving side and the step-back roller 10 on the discharge side, which are not shown in FIGS. 6, 7 and 8, are driven in forward rotation and reverse rotation in synchronization with the press drive 9.

The operation from the start of printing to the end of printing at the time of first printing (printing of the first page) will be described based on FIG.

Fig. 6 shows changes in the rotation angles of the blanket copper 8 and the press tube 9 from the initial printing start to the printing end in chronological order.

As shown in Fig. 6(A), the platen 9 drives forward rotation so that the substrate to be printed W travels in the forward direction, and the tip 8a-1 of the blanket 8a is the circumferential surface of the platen 9 The image of the blanket 8a is started to be printed on the substrate W to be printed by starting to contact the substrate W in contact with the substrate W. The tip 8a-1 of the blanket 8a is the end of the blanket 8a on the downstream side in the rotational direction.

From this state, the pressing copper 9 is driven forward rotation at a constant speed equal to the speed of the blanket copper 8, and the blanket copper 8 and the pressing copper 9 are rotationally driven, as shown in Fig. 6B. Similarly, the first images are sequentially printed on the substrate W to be printed from the blanket 8a.

As shown in Fig. 6C, the first printing is ended when the rear end 8a-2 of the blanket 8a comes into contact with the substrate W to be printed in contact with the circumferential surface of the press copper 9.

The rear end 8a-2 of the blanket 8a is the upstream end of the blanket 8a in the rotational direction.

In other words, by synchronizing the step-back roller 6 on the receiving side and the step-back roller 10 on the discharge side and the press copper 9, the blanket (W) is driven forward rotation at a constant speed, while traveling at a constant speed in the forward direction. By bringing 8a) into contact with the substrate W to be printed, the image of the blanket 8a is first printed on the substrate W to be printed.

The rotation angle (α) of the blanket copper (8) is a straight line (b) connecting the rotation center (8b) of the blanket copper (8) and the rotation center (9c) of the pressure copper (9) and the rear end (8a) of the blanket (8a). It is the angle formed by -2), and the position of the straight line (b) at the end of printing is 0 degrees, and the forward rotation direction is positive. The rotation angle (β) of the press cylinder (9) is the angle formed by the straight line (b) and the rear end (G-1) of the printed image (G) printed on the substrate (W), and the straight line (b) at the end of printing. The position is set to 0 degrees and the forward rotation direction is positive. That is, when the printing ends in Fig. 6C are α=0 and β=0, the blanket copper 8 and the presser 9 are driven forward rotation from the state of the printing end, so that α and β increase, respectively.

The length of the first printed image (G) printed on the substrate (W) (the distance from the rear end (G-1) to the front end (G-2) of the printed image (G)), that is, the print range for one page It matches the size of the blanket 8a (distance from the front end 8a-1 to the rear end 8a-2 of the blanket 8a). The rear end (G-1) of the printed image (G) is the end of the upstream side in the forward rotation direction of the presser (9). The tip (G-2) of the printed image (G) is the downstream end of the presser (9) in the forward rotation direction.

The rotation angle from the straight line (b) of the blanket copper (8) at the end of printing to the tip (8a-1) of the blanket (8a) is the first blanket movement rotation angle (α-1), and the straight line ( The rotation angle from b) to the tip G-2 of the printed image G is the first pressing rotation angle β-1. Since the blanket copper 8 and the rolling drive 9 have the same rotational drive speed, and the size of the blanket 8a and the length of the printed image G are the same, α-1 and β-1 are at the same angle.

In addition, the printed image G is printed on the surface of the substrate W to be printed, but in order to facilitate understanding, it is shown inside the circumferential surface of the pressure cylinder 9 in FIG. 7 and 8, which will be described later, also show a printed image on the inside of the circumferential surface of the pressure copper 9.

At the end of printing shown in Fig. 6C, the presser 9 is driven forward rotation at a constant speed, so after the printing is finished, the presser 9 is driven to decelerated forward rotation to gradually stop the rotation of the presser 9, and the substrate to be printed ( While preventing the occurrence of slip between W) and the circumferential surface of the platen 9, it prevents failure to occur in the drive system of the presser 9 or the like. In other words, if the presser 9, which is driven to rotate at a constant speed, suddenly stops rotating, it causes slip between the substrate to be printed (W) and the circumferential surface of the presser 9, and is unreasonable for the drive system of the presser 9. The force acts and causes a breakdown.

Since the presser 9 gradually stops rotating after printing is finished, the presser 9 is rotated forward at a predetermined rotation angle from the position at the end of printing shown in FIG. 6C as shown in FIG. 6D. Stop rotation. That is, the rotation angle β at the rotation stop position of the pressing copper 9 is the second pressing rotation angle β-2.

In the state in which the press copper 9 is stopped rotating, as shown in Fig. 6D, the rotation angle α of the blanket copper 8 is the second blanket movement rotation angle α-2.

The second blanket dynamic rotation angle α-2 is greater than the second pressure dynamic rotation angle β-2. That is, the blanket copper 8 is rotated at a constant speed even after the printing is finished, but the press copper 9 is driven to rotate with a reduced speed after the printing is finished, so that α-2>β-2.

When the presser 9 is decelerated forward rotation driven by the second pressurizing rotation angle (β-2) from the position at the end of printing (β=0), the substrate to be printed (W) and the blanket (8a) are separated, and the substrate to be printed ( Since W) is not pinched by the platen copper 9 and the blanket copper 8, slip is likely to occur between the circumferential surface of the platen 9 and the substrate W to be printed.

The operation from the end of the first printing to the start of the second printing (printing of the second page) will be described based on FIG. 7.

Fig. 7 shows the change in the rotation angles of the blanket copper 8 and the platen 9 from the rotation stop of the presser 9 to the start of the second printing in chronological order.

As shown in Fig. 7(A), the first printing operation is finished and the rotationally stopped presser 9 is driven to accelerate reverse rotation as indicated by the dotted arrow, and the printed material W is indicated by the dotted arrow. Drive in the reverse direction.

As shown in (B) of FIG. 7, the pressing copper 9 is driven in reverse rotation by the second pressing rotation angle β-2, and the rear end (G-) of the printed image G first printed on the substrate W When 1) moves to the position at the end of printing (β = 0), the presser 9 is brought to a predetermined reverse rotation drive speed. The predetermined reverse drive speed is the fastest reverse drive speed and is a speed slower than a constant speed during printing.

The rotation angle α of the blanket copper 8 in the state shown in Fig. 7B is the third blanket movement rotation angle α-3. α-3>α-2.

After that, the pressing copper 9 is driven to rotate in a decelerated reverse direction to gradually stop the rotation of the pressing copper 9. In a state in which the presser 9 is stopped rotating, as shown in Fig. 7C, the rotational angle β of the presser 9 is the third presser rotational angle β toward the position from the position at the end of printing (β=0). -3) It becomes a misaligned position.

The size of the third pressing rotation angle β-3 is the same as the second pressing rotation angle β-2. β-3=β-2.

The blanket copper 8 is rotated until its rotation angle α becomes the fourth blanket movable rotation angle α-4 (α-4> α-3), and the tip 8a-1 of the blanket 8a Is approaching the printing start position of the platen 9. The angle formed by the front end 8a-1 of the blanket 8a and the straight line b is the fifth blanket dynamic rotation angle α-5. α-5 = 360 degrees-(α-1 + α-4), α-5> β-3.

Since the presser 9 gradually stops rotating, it prevents the occurrence of slip between the substrate W and the circumferential surface of the presser 9, and there is no failure in the drive system of the presser 9 .

In addition, the receiving-side step-back roller 6 and the discharge-side step-back roller 10 are rotationally driven in the same manner as the press drive 9.

The substrate to be printed (W) is, as shown in FIGS. 7A to 7C, a portion of the circumferential surface of the blanket copper 8 to which the blanket 8a is not attached and the circumferential surface of the pressing copper 9 Since it travels toward the location 1B side (runs in the reverse direction) through the gap therebetween, the substrate to be printed (W) is not pinched by the pressing member (9) and the blanket member (8). The slip is likely to occur between the circumferential surface of 9) and the substrate W to be printed.

As shown in Fig. 7(C), from the state in which the presser 9 is stopped rotating, the presser 9 is gradually driven for forward rotation by driving the presser 9 to accelerate and forward rotation, and the substrate to be printed (W) is driven in the forward direction. do.

And when the rotation angle β of the presser 9 is driven forward rotation by the third pressurization rotation angle β-3, as shown in Fig. 7D, the rear end G-1 of the print image G is The tip 8a-1 of the blanket 8a contacts (β=0).

In this state, the second printing is started by making the pressure copper 9 drive forward at the same constant speed as the blanket copper. In addition, the receiving-side step-back roller 6 and the discharge-side step-back roller 10 are rotationally driven in the same manner as the press drive 9.

Since the presser 9 gradually starts to rotate, it prevents the occurrence of slip between the substrate W and the circumferential surface of the presser 9, and there is no failure in the drive system of the presser 9. .

Therefore, when the first printing is performed, the blanket copper 8 rotates once (360 degrees). During one rotation of the blanket copper 8, the press copper 9 rotates in the forward direction by the size (image range) of the blanket 8a rotating during printing.

As shown in Fig. 7(C), after deceleration and reverse rotation drive is performed, and after the rotation of the presser 9 stops, the presser 9 is driven to accelerate forward rotation again, and as shown in Fig. 7D, it rotates forward until the start of printing. During the drive, the substrate to be printed (W) and the blanket (8a) are separated, and the substrate to be printed (W) is not clamped by the pressure copper (9) and the blanket copper (8). Slip is likely to occur between the substrates W.

That is, the operation from the end of the first printing to the start of the second printing is performed after the first printing is completed and the presser 9 stops rotating, and then the step-back roller 6 on the receiving side and the step-back roller 10 on the discharge side are stopped. ) And pressing (9) in synchronization with acceleration reverse rotation drive, deceleration reverse rotation drive, and acceleration forward rotation drive, so that the substrate to be printed (W) is moved to the rear end (G-1) of the print image (G). It is to run in the reverse and forward direction as much as possible.

The operation from the start of printing to the end of printing when performing the second printing (printing of the second page) will be described based on FIG.

Fig. 8 shows the changes in the rotation angles of the blanket copper 8 and the press tube 9 from the start of the second printing to the end of the second printing in chronological order.

As shown in Fig. 8A, in a state in which the rear end G-1 of the first printed image G and the tip 8a-1 of the blanket 8a are in contact with each other, the presser 9 is inserted into the blanket copper ( The second printing is started by driving forward rotation at the same constant speed as 8). As shown in Fig. 8B, the front end H-2 of the second printed image H continues with the rear end G-1 of the first printed image G.

When the presser 9 is driven forward rotation at the first pressing rotation angle β-1, the rear end of the second print image H and the rear end of the blanket 8a, as shown in Fig. 8C. (8a-2) matches, and the second printing ends.

From this state, by decelerated forward rotation drive of the presser 9, the presser 9 is rotated by a second pressurizing rotation angle β-2 as shown in Fig. 8D to stop rotation. That is, the second printing is performed like the first printing.

Printing after the third is performed like the second printing.

Based on Fig. 9, the rotational angle and rotational drive speed of the presser 9 relative to the rotational angle of the blanket copper 8 during the period from the end of printing to the start of printing and the end of printing again, that is, when performing one printing operation. Explain the rain.

Fig. 9 is a chart (graph) showing the rotation angle and rotational drive speed ratio of the rolling column 9 to the rotation angle of the blanket copper 8, and the horizontal axis is the rotation angle of the blanket copper 8 and shows one printing operation. To bet, it appears from 0 degrees to 360 degrees. That is, the horizontal axis is the rotation angle (α). The vertical axis represents the rotation angle of the presser 9 and the rotational drive speed ratio of the presser 9, and the rotation angle of the presser 9 at the end of printing and at the beginning of printing is set to 0 degrees, and the rotation angle at the time of forward rotation drive Is represented by plus, and the rotation angle during reverse rotation is represented by minus. In other words, the rotation angle of the vertical axis of the pressure cylinder 9 is the rotation angle β. As for the rotational drive speed ratio, the speed during printing is set to 100%, and when the presser 9 is stopped rotating, it is set to 0%.

The change in the rotational drive speed ratio of the presser 9 is indicated by a solid line (X), and the rotation angle of the presser 9 is indicated by a solid line (Y).

Section 1 of Fig. 9 shows from the end of printing in Figs. 6(C) and 8(C) until the press cylinder 9 of Figs. 6(D) and 8(D) stops rotating. .

In section 1, the rotational drive speed ratio of the presser 9 is smoothly changed from a constant speed during printing (100%) to 0% at which the presser 9 stops rotating, as indicated by the solid line X.

As indicated by the solid line (Y), the rotation angle of the pressing copper 9 smoothly changes from 0 degrees to the second pressing rotation angle β-2.

The rotation angle of the blanket copper 8 varies from 0 degrees to the second blanket movement rotation angle α-2.

Section 2 of FIG. 9 shows until the pressure cylinder 9 of FIGS. 7A and 7B is driven in an accelerated reverse rotation to a predetermined reverse rotation drive speed.

In section 2, the rotational drive speed ratio of the presser 9 is smoothly changed from 0% to the rotational drive speed ratio which becomes a predetermined reverse rotation drive speed, as indicated by the solid line X. The rotation angle of the pressing copper 9 is smoothly changed from the second pressing rotation angle β-2 to 0 degrees, as indicated by the solid line Y.

The rotation angle of the blanket copper 8 varies from the second blanket copper rotation angle α-2 to the third blanket movement rotation angle α-3.

The magnitude of the change in the rotation angle of the blanket copper 8 is larger in section 2 than in section 1, because the change in the rotational drive speed ratio of the pressure copper is gentler in section 2 than in section 1.

Section 3 of FIG. 9 shows the pressure cylinder 9 of FIGS. 7 (B) and 7 until the rotation is stopped by deceleration and reverse rotation drive.

In section 3, the rotational drive speed ratio of the presser 9 is smoothly changed to 0% from the rotational drive speed ratio, which becomes a predetermined reverse rotation drive speed, as indicated by the solid line X. The rotational angle of the pressing copper 9 is smoothly changed from 0 degrees to the third pressing rotational angle β-3 as indicated by the solid line Y.

The rotation angle of the blanket copper 8 is changing up to the fourth blanket copper rotation angle α-4.

Section 4 of FIG. 9 shows the pressing cylinder 9 of FIGS. 7 (C) and 7 (D) until it reaches the print start position at a constant printing speed by accelerating forward rotation.

In section 4, the rotational drive speed ratio of the presser 9 is smoothly changed from 0% to 100%, which becomes a constant forward rotational drive speed during printing, as indicated by the solid line X. The rotational angle of the pressing copper 9 is smoothly changed from the third pressing rotational angle β-3 to 0 degrees, as indicated by the solid line Y.

The rotation angle of the blanket copper 8 is changed up to the sum of the fourth blanket movement rotation angle α-4 and the fifth blanket movement rotation angle α-5.

The size of the change in the rotation angle of the blanket copper 8 is larger in section 3 than in section 4, because the change in the rotational drive speed ratio of the pressure copper is gentler in section 3 than in section 4. Section 1 to Section 4 are the non-printing range.

Section 5 of FIG. 9 indicates printing, the rotational drive speed ratio of the presser 9 is 100% as indicated by the solid line (X), and the rotation angle of the presser 9 is 0 as indicated by the solid line (Y). It changes linearly from degrees to the first pressing rotation angle β-1. Section 5 is the print range.

The curve representing the change in the rotational drive speed ratio of the decelerated forward rotation drive of the presser 9 in section 1 and the curve representing the change in the rotational drive speed ratio of the accelerated forward rotation drive of the presser 9 in section 4 are linearly symmetric.

The curve showing the change in the rotational drive speed ratio of the accelerated reverse rotation drive of the presser 9 in section 2 and the curve showing the change in the rotational drive speed ratio of the decelerated reverse rotation drive of the presser 9 in section 3 are linear symmetry. .

Then, the rotational drive speed ratio from the constant speed of the presser 9 to the predetermined reverse rotational drive speed and the rotational drive speed ratio from the predetermined reverse rotational drive speed to the constant speed change smoothly along a substantially U-shaped curve.

Fig. 10 is a chart showing the change in the rotational drive speed of the presser, and shows the case of two different printing speeds of the rotational drive speed of the presser 9 with respect to the rotational angle of the blanket copper 8. Regardless of the printing speed, the change in speed from the constant speed during printing to the predetermined reverse rotation drive speed and the speed change from the predetermined reverse rotation drive speed to the constant speed during printing form an approximately U-shaped curve. Because it changes smoothly along the way, the speed of the platen 9 changes smoothly, and the substrate to be printed (W) smoothly changes directions in the reverse and forward directions and travels between the substrate to be printed (W) and the circumferential surface of the platen (9). It is possible to accurately print on the substrate to be printed (W) by preventing the occurrence of slip.

As shown in Fig. 11, if a blanket 8a having a small size is attached to the blanket copper 8, and the presser 9 is rotated and printed as in the previous embodiment, the presser 9 is accelerated and reversed after printing. The fifth blanket motion rotation angle (α-5) formed by the front end (8a-1) of the blanket (8a) and the straight line (b) when the pressure copper 9 stops rotating by driving, deceleration and reverse rotation is shown in FIG. It becomes larger than the angle shown in C).

Therefore, when printing is started by accelerating forward rotation drive of the presser 9, the rear end G-1 of the print image G and the front end 8a-1 of the blanket 8a do not contact, so that proper printing cannot be performed.

That is, in Fig. 12, as in Fig. 9, the change in the rotational drive speed ratio of the presser 9 is indicated by a solid line X, and the rotation angle of the presser 9 is indicated by a solid line Y, the size of the blanket 8a As is small, the rotation angle at which the blanket copper 8 rotates during the printing of section 5 is small, and the rotation angle of the blanket copper 8 from the end of printing to the start of printing is large. As shown in Fig. 1, it is not possible to print correctly in the case of the rotation drive of the presser 9.

So, as shown in Fig. 12, the rotation drive speed ratio of the decelerated forward rotation drive of the press copper 9 in section 1, the rotation drive speed ratio of the accelerated reverse rotation drive in the section 2, and the rotation drive speed ratio of the decelerated reverse rotation drive in section 3, Change the rotational drive speed ratio of the accelerated forward rotation drive in section 4 so that the rear end (G-1) of the print image (G) and the front end (8a-1) of the blanket 8a contact at the printing start position. That is, in the case of the small blanket 8a, the second pressing rotation angle (β-2) and the third pressing rotation angle (β-3) are increased as the fifth blanket dynamic rotation angle (α-5) increases. .

As shown in Fig. 13, if a large-sized blanket 8a is attached to the blanket copper 8, and the presser 9 is rotated and printed as in the previous embodiment, the presser 9 is accelerated and reverse rotation driven after printing. , The fifth blanket motion rotation angle (α-5) formed by the tip (8a-1) of the pressure copper (8a) and the straight line (b) when the pressure copper (9) stops rotating by decelerated reverse rotation is shown in FIG. It becomes smaller than the angle shown in ).

Therefore, when printing is started by accelerating forward rotation drive of the presser 9, the rear end G-1 of the print image G and the front end 8a-1 of the blanket 8a do not contact, so that proper printing cannot be performed.

That is, in Fig. 14, as in Fig. 9, the change in the rotational drive speed ratio of the presser 9 is indicated by a solid line X, and the rotation angle of the presser 9 is indicated by a solid line Y, the size of the blanket 8a Because of the large size, the rotation angle at which the blanket copper 8 rotates during the printing of section 5 is large, and the rotation angle of the blanket copper 8 from the end of printing to the start of printing of the press copper 9 is small. As shown in Fig. 1, it is not possible to print correctly in the case of the rotation drive of the presser (9).

So, as shown in Fig. 14, the rotation drive speed ratio of the decelerated forward rotation drive of the press copper 9 in section 1, the rotation drive speed ratio of the accelerated reverse rotation drive in the section 2, and the rotation drive speed ratio of the decelerated reverse rotation drive in section 3, Change the rotational drive speed ratio of the accelerated forward rotation drive in section 4 so that the rear end (G-1) of the print image (G) and the front end (8a-1) of the blanket 8a contact at the printing start position. That is, in the case of the large blanket 8a, the second pressing rotation angle (β-2) and the third pressing rotation angle (β-3) are reduced as the fifth blanket dynamic rotation angle α-5 decreases. .

In the case of changing the number of printed pages per unit time by changing the printing speed, the rotation angle of the blanket copper 8 when the pressure copper 9 starts deceleration from a constant speed and when it reaches a constant speed is not changed. Change the acceleration of the forward/reverse rotation drive.

For example, as shown in Fig. 10, when the printing speed indicated by the dotted line is slower than the printing speed indicated by the solid line, the rotation angle of the blanket copper 8 and the pressing copper 9 at the time of deceleration start from the constant speed of the pressing copper 9 Without changing the rotation angle of the blanket copper 8 at this constant speed, the acceleration when driving the pressure copper 9 forward and reverse rotation is reduced.

Next, a configuration in which the substrate W to be printed is wound around the circumferential surface of the pressure copper 9 will be described.

As shown in Fig. 4, the substrate W is wound around the circumferential surface of the pressing copper 9 from the location-side travel path 15a to reach the discharge-side travel path 15b.

The location-side running path 15a is a running path on the upstream side in the running direction when the printed material W runs in the forward direction, and is a running path on the downstream side in the running direction when the printed material W runs in the reverse direction. .

The discharge side running path 15b is a running path on the downstream side in the running direction when the printed material W runs in the forward direction, and is a running path on the upstream side in the running direction when the printed material W runs in the reverse direction. .

The substrate to be printed (W) traveling between the blanket copper (8) and the pressing copper (9) is a guide roller on the receiving side (40) and a guide roller on the discharge side (41), and a predetermined winding angle on the circumferential surface of the pressing copper (9). Wound with

The ground-side guide roller 40 is installed on the ground-side travel path 15a.

The discharge side guide roller 41 is provided on the discharge side travel path 15b.

By changing the position of at least one of the receiving side guide roller 40 and the discharge side guide roller 41, the winding angle of the printed substrate W with respect to the circumferential surface of the pressing member 9 is changed.

The landing side guide roller 40 and the discharge side guide roller 41 are rollers that rotate freely and are not driven to rotate by a driving motor or the like.

As shown in FIG. 15, the positioning-side guide roller 40 is provided at a position near the positioning portion 1B than the pressing member 9.

The position (40a) where the circumferential surface of the positioning side guide roller 40 and the substrate to be printed (W) are in contact with the substrate (W) on the circumferential surface of the pressing copper (9) is the blanket (8a) of the blanket copper (8) The substrate to be printed (W), which is located below the position (hereinafter referred to as the printing position) 9a, which is in contact with the position (hereinafter referred to as the printing position) (9a), is pressed against the lower circumferential surface of the position side guide roller (40). It travels obliquely so that the position 40a contacting the position-side guide roller 40 between the upper portions of the circumferential surface of 9) is low, and the position at which the contact starts with the circumferential surface of the pressure cylinder 9 is increased.

Therefore, the winding start position on the location side where the printed substrate W traveling on the location side travel path 15a starts winding on the circumferential surface of the pressure copper 9 (on the location side where contact starts with the circumferential surface of the pressure copper 9) The position) (16a) is a position side more than the printing position (9a) of the press copper (9), and is a position lower than the printing position (9a).

The discharge side guide roller 41 is provided near the mounting portion 1B than the pressing copper 9 and closer to the mounting side travel path 15a. The position 41a on the side of the presser 9 where the circumferential surface of the discharge side guide roller 41 and the substrate W start contacting is located above the lower position 9b on the circumferential surface of the presser 9, The substrate to be printed (W) traveling on the side of the presser (9) than the guide roller (41) on the discharge side in the discharge side travel path (15b) has a lower circumferential surface of the presser (9) and the circumference of the discharge side guide roller (41) It travels obliquely so that the position to start contacting with the circumferential surface of the presser 9 between the top portions is low, and the position 41a to start contacting with the discharge side guide roller 41 is high. The lower position 9b of the circumferential surface of the presser 9 is an intersection point of a straight line a passing through the printing position 9a and the center 9c of the presser 9 and the lower circumferential surface of the presser 9.

Therefore, the winding start position on the discharge side at which the printed substrate W traveling on the discharge side travel path 15b starts winding on the circumferential surface of the pressure copper 9 (on the discharge side where contact starts with the circumferential surface of the pressure copper 9) The position) (16b) is the position side than the lower position 9b of the circumferential surface of the pressure copper 9, and is a position higher than the lower position 9b.

That is, a straight line connecting the position 40a in which the substrate W contacts the circumferential surface of the supporting roller 40 and the winding start position 16a on the circumferential surface of the pressing copper 9 ( The position (41a) where the substrate to be printed (W) contacts the circumferential surface of the circumferential surface of the circumferential surface of the circumferential surface of the circumferential surface of the circumferential surface of the circumferential surface of the circumferential surface of the circumferential surface of the circumferential surface (41a) and And the straight line connecting the winding start position 16b on the discharge side on the circumferential surface of the platen 9 (the extension line of the discharge side running path 15b between the discharge side guide roller 41 and the platen 9) Cross.

Therefore, the winding angle (θ) that the substrate to be printed (W) is wound around the circumferential surface of the platen (9) is greater than 180 degrees, and is 270 degrees in FIG. 15, and the circumference of the printed material (W) and the platen (9) Since the surface contact area is wide, the frictional force generated between the two is large.

The reason why the friction force is a large value is as follows.

As the substrate to be printed (W) is wound around the circumferential surface of the platen (9), a force from the substrate to be printed (W) toward the center (9c) of the platen (9) is generated in the wound range. do.

As a reaction of this force, a normal force is generated in the substrate W in the range wound around the circumferential surface of the pressure copper 9.

The frictional force acting on the substrate to be printed (W) is proportional to the normal force over the entire range of the substrate (W) wound around the circumferential surface of the substrate (W) to be printed (W). The wider the range wound around the circumferential surface, the greater the frictional force.

Therefore, if the winding angle (θ) wound around the circumferential surface of the printed material (W) is a large angle, the frictional force generated between the printed material (W) and the circumferential surface of the pressing copper (9) is a large value. Becomes.

If the frictional force generated between the substrate to be printed (W) and the circumferential surface of the presser (9) is a large value, the presser (9) is driven in a reverse rotation and the pressure of the presser (9) when traveling in the reverse direction. Slip occurring between the peripheral surface and the substrate W to be printed can be suppressed.

As shown in Fig. 4, the portion of the substrate W wound on the circumferential surface of the press copper 9 (the winding start position 16a on the positioning side and the winding start position 16b on the discharge side shown in Fig. 15) A nip roller 42 and a drying device 43 for pressing are installed opposite to the circumferential surface portion).

The pressing nip roller 42 is installed by pressure contacting the circumferential surface of the pressing copper 9, and the substrate to be printed (W) is always gripped by the circumferential surface of the pressing nip roller 42 and the pressing copper 9 while running. do. That is, the nip roller 42 for pressing force presses the substrate W to be printed on the circumferential surface of the pressing member 9.

By installing the pressing nip roller 42, the frictional force generated between the substrate to be printed (W) and the circumferential surface of the pressing copper 9 increases in the portion pressed by the pressing nip roller 42, resulting in a large frictional force. Becomes.

In addition, when the substrate to be printed (W) is running in the reverse direction by driving the presser (9) in the reverse direction, the circumferential surface of the presser (9) and the circumferential surface of the blanket copper (8) are separated, so that the substrate to be printed (W) is blanketed. Since it is not in contact with the copper 8, the substrate W running in the reverse direction is pressed against the circumferential surface of the pressing copper 9 with a nip roller 42 for pressing (nip position 42a in Fig. 15). The downstream side of the running direction is pulled in the running direction.

As the substrate to be printed (W) is pulled in the traveling direction, a force from the substrate (W) toward the center 9c of the presser (9) is generated with respect to the circumferential surface of the presser (9).

Due to this force, the air remaining between the circumferential surface of the platen 9 and the substrate W is evacuated to suppress the formation of an air layer. The frictional force of is less likely to be reduced by the air layer.

Further, the frictional force between the circumferential surface of the platen 9 and the substrate W to be printed increases due to the force from the substrate W to be printed in the direction of the center of the platen 9 with respect to the circumferential surface of the platen 9.

When these points are added, the pressing member (9), the receiving side stepback roller (6) and the discharge side stepback roller (10) are driven in a reverse rotation to drive the substrate to be printed (W) in the reverse direction, and the pressing member (9) is printed. When the substrate to be printed (W) travels in the forward direction from the start position until the rotation stops, and when the substrate to be printed (W) traveled in the reverse direction is driven in the forward direction to the starting position (i.e., the substrate to be printed (W)) When the substrate (W) is separated from the blanket (8a) and travels in a state where the substrate to be printed (W) is not pinched by the pressure copper (9) and the blanket copper (8)), the circumferential surface of the substrate to be printed (W) and the There is no slip between them.

Therefore, it is possible to prevent the occurrence of deviations in print alignment.

To increase the frictional force between the circumferential surface of the pressure copper (9) and the substrate to be printed (W) by suppressing the formation of the air layer described above, it contacts the circumferential surface of the pressure copper (9) of the printed material (W) to be pulled. The longer the length of the part (the length from the winding start position 16a on the position side to the winding start position 16b on the discharge side shown in Fig. 15) is more effective.

Therefore, as shown in Fig. 15, the nip roller 42 for pressing is such that the nip position 42a that presses against the circumferential surface of the pressing member 9 is closer to the discharge side guide roller 41 than the printing position 9a of the pressing member. Installed.

That is, the nip position 42a which is in pressure contact with the circumferential surface of the presser 9 of the presser nip roller 42 is less than the printing position 9a of the presser 9 when the substrate to be printed (W) runs in the reverse direction. It is the upstream side in the running direction (upstream side in the reverse rotation direction) of the printing substrate W.

Further, the nip position 42a is preferably a position closest to the discharge side guide roller 41 that does not exceed the winding start position 16b on the discharge side.

When the nip position 42a exceeds the winding start position 16b on the discharge side, as will be described later, when the pressing nip roller 42 is separated from the circumferential surface of the pressing member 9, the pressing of the substrate W ( As the winding angle with respect to the circumferential surface of 9) changes and the length of the running path changes, printing alignment is misaligned.

The nip roller 42 for pressing is movable over a position to be pressed against the circumferential surface of the pressing member 9 and a position spaced apart from it.

The mounting configuration of the pressing nip roller 42 will be described with reference to FIGS. 16 and 17.

The machine frame 2A of the printing unit includes an operation-side frame 2A-1 on one side in a direction perpendicular to the traveling direction of the substrate W to be printed, and a drive-side frame 2A-2 on the other side.

The support shaft 50 of the discharge side guide roller 41 is positioned in the axial direction over the operation-side frame 2A-1 and the drive-side frame 2A-2 and is rotatably mounted, and the support shaft ( 50), the discharge side guide roller 41 is rotatably mounted. Further, one end of the support shaft 50 in the longitudinal direction protrudes outward from the operation-side frame 2A-1.

The base end of the support arm 51 is fixed so as not to rotate at two positions spaced apart in the longitudinal direction of the support shaft 50 and mounted respectively. The nip roller shaft 52 is fixedly mounted so that it does not rotate across the front ends of the two support arms 51, and the nip roller 42 for pressing is rotatably mounted to the nip roller shaft 52. .

The nip roller moving cylinder 53 is rotatably mounted on the outer surface (surface) of the operating frame 2A-1 of the machine frame 2A of the printing unit, and the piston rod of the nip roller moving cylinder 53 The base end of the lever 54 is attached to 53a so as to be rotatable. The support shaft 50 is fixedly attached to the distal end of the lever 54 so as not to rotate.

Then, by extending the piston rod 53a of the nip roller moving cylinder 53, the lever 54 rotates counterclockwise in FIG. 16, and the support shaft 50 rotates counterclockwise at a predetermined rotation angle. 51 is rotated toward the circumferential surface of the presser 9, and the nip roller 42 for pressurization moves to a position where it presses against the circumferential surface of the presser 9.

By reducing the piston rod 53a of the nip roller moving cylinder 53, the lever 54 rotates clockwise in FIG. 16, and the support shaft 50 rotates clockwise at a predetermined rotation angle, and the support arm 51 It rotates in a direction away from the circumferential surface of the presser 9, and the nip roller 42 for pressurization moves to a position spaced apart from the circumferential surface of the presser 9.

Therefore, during the printing operation, the nip roller 42 for the presser is moved to a position where it presses against the circumferential surface of the presser 9 to prevent the occurrence of slip, and during the maintenance and inspection work, the nip roller 42 is By moving it to a position away from the circumferential surface, maintenance and inspection work, etc. are facilitated.

In addition, when printing an image on the substrate to be printed (W), the circumferential surface of the pressure copper (9) and the blanket (8a) of the blanket copper (8) are in contact with the substrate to be printed (W). Even without 42), no slip occurs between the circumferential surface of the pressure copper 9 and the substrate W to be printed (see Fig. 6). In addition, even if the nip roller 42 for the presser is separated from the circumferential surface of the presser 9, the position on the side of the presser 9 where the substrate to be printed (W) starts contacting on the circumferential surface of the guide roller 41 on the discharge side ( The length of the discharge side travel path 15b between the straight line connecting 41a) and the winding start position 16b on the discharge side on the circumferential surface of the press copper 9 does not change. Therefore, even if the nip roller 42 for the pressing member is separated from the circumferential surface of the pressing member 9, there is no variation in printing alignment (see Fig. 15).

As shown in Fig. 4, the drying device 43 performs fixing and drying of ink of an image printed on the substrate W to be printed. In this embodiment, since printing is performed using an ultraviolet curable ink, a drying apparatus that is irradiated with ultraviolet rays and dried is used. As a light source of ultraviolet light, a mercury lamp, a metal halide lamp, and an LED lamp can be appropriately selected, but an LED lamp is suitable to reduce the influence of heat on the substrate to be printed (W).

The drying device 43 is provided between the printing position 9a of the pressing member 9 and the nip roller 42 for pressing. In other words, the drying device 43 is installed on the upstream side of the pressing nip roller 42 in the positive rotation direction.

Therefore, since the nip roller 42 for press-rolling contacts after the ink of the printed image is fixed and dried, the image is not disturbed by contact with the nip roller 42 for press-rolling.

The heat generated by the drying device 43 may cause the pressure copper 9 or the substrate to be printed (W) to be at a high temperature, and the substrate to be printed (W) may be adversely affected by heat. In particular, when a material for flexible packaging such as a film is used as the substrate to be printed (W), it is likely to be adversely affected by heat. As a bad influence due to heat, there is an elongation of the substrate W to be printed due to heat, and the printing alignment is misaligned.

Therefore, a cooling device 72 is installed in the platen 9 to cool the platen 9 so that the platen 9 or the printed material W does not become at a high temperature adversely affected by heat.

The cooling device 72 of the pressure copper 9 will be described based on FIGS. 18 and 19.

The pressure copper 9 is a cylindrical body 60, one end plate 61 closing one opening of the cylinder 60, and the other end plate 62 closing the other opening of the cylinder 60, and has a hollow portion. .

One end plate 61 is provided with one support shaft 63, and one support shaft 63 is rotatably supported by an eccentric bearing 64 to the operation-side frame 2A-1.

The other support shaft 65 is installed on the other end plate 62, and the other support shaft 65 is rotatably supported by the drive-side frame 2A-2 by an eccentric bearing 64. . Further, the eccentric bearing 64 on the other side is equipped with an eccentric part 64a for fixing a motor for fixing the drive motor 68 for pressing.

A motor support frame 67 is mounted on the drive-side frame 2A-2 via a stay 66, and an eccentric part 64a for fixing a motor is rotatably mounted to the motor support frame 67. , The drive motor 68 for pressing is mounted on the eccentric part 64a for fixing the motor.

The rotation shaft (not shown) of the driving motor 68 for pressurization and the other support shaft 65 are connected by a coupling (not shown).

The presser 9 is driven by a drive motor 68 for pressurization and is driven in forward rotation and reverse rotation.

The drive motor 68 for the pressure copper drives the drive motor of the step back roller 6 on the receiving side and the step back roller 10 on the discharge side independently of the drive motors (not shown) of the plate copper 7 and the blanket copper 8 It is controlled synchronously with the motor.

Accordingly, the press drive 9 is driven for forward rotation and reverse rotation in synchronization with the step-back roller 6 on the receiving side and the step-back roller 10 on the discharge side.

In the hollow portion of the pressure copper 9, a cooling water distribution pipe (not shown) is provided. This pipe passes through one end plate 61 and one support shaft 63 and protrudes outward from the operation-side frame 2A-1, and passes through a rotary joint 69 to supply a cooling water supply pipe 70 and It is connected to the cooling water discharge pipe 71. The cooling water supply pipe 70 is connected to the discharge side of the cooling water supply pump, and the cooling water discharge pipe 71 is connected to the cooling water tank.

Then, the cooling water flows into the pipe from the cooling water supply pipe 70, and the cooling water flows through the pipe and flows out from the cooling water discharge pipe 71.

As the cooling water flows through the pipe in this way, the pressure copper 9 is cooled, and a cooling device 72 for the pressure copper is formed.

The rotation center of each eccentric bearing 64 and the eccentric component 64a for fixing the motor and the rotation center of the support shafts 63 and 65 are eccentric, and each eccentric bearing 64 is rotated by a rotation mechanism 73 By angular rotation, the pressing copper 9 and the driving motor 68 for pressing are eccentrically rotated at a predetermined rotation angle.

By eccentric rotation of the platen copper 9, the position of the platen 9 with respect to the blanket copper 8 is changed, so that the contact pressure (printing pressure) between the circumferential surface of the platen 9 and the blanket 8a of the blanket copper 8 is reduced. Can be adjusted.

The rotating mechanism 73 will be described.

A rotation shaft 74 is rotatably mounted across the operation-side frame 2A-1 and the drive-side frame 2A-2. The worm gear 75 mounted on the rotating shaft 74 is engaged with the worm 77 mounted on the shaft 76. The rotating shaft 74 rotates by rotating the handle 76a fixed to the shaft 76.

Each eccentric bearing 64 is equipped with a fan-shaped gear 78, and each of the gears 78 meshes with gears 79 respectively mounted on both sides of the rotation shaft 74 in the longitudinal direction.

Therefore, by rotating the shaft 76 by the handle 76a, each eccentric bearing 64 rotates at a predetermined rotation angle.

As shown in Fig. 1, alignment devices 80 are provided between the printing units of the printing unit 2, respectively. Specifically, between the first printing unit (2a) and the second printing unit (2b), between the second printing unit (2b) and the third printing unit (2c), the third printing unit (2c) and the fourth printing Between the units (2d), between the fourth printing unit (2d) and the fifth printing unit (2e), between the fifth printing unit (2e) and the sixth printing unit (2f), the alignment adjustment device 80 Each is installed.

The alignment adjustment device 80 adjusts the printing alignment according to the length of the image to be printed in the vertical direction before starting printing.

In the conventional intermittent printing machine disclosed in Patent Literature 1, the printing alignment is adjusted by moving the printing unit in a state in which the rotation is stopped and the distance between the printing units is changed. However, this method of adjusting the printing alignment is applied to the intermittent printing machine of the present invention. I can't.

The reason is that in the intermittent printing machine of the present invention, the substrate to be printed (W) is wound around the circumferential surface of the pressing member (9), so when the printing units (2a to 2f) are moved, the pressing member (9) also moves, This is because there is a case where the substrate to be printed (W) is pulled and cut or loosened by movement.

The alignment adjustment device 80 of the present invention adjusts the printing alignment by changing the length of the travel path (length of the paper path) of the substrate W to be printed between the printing units.

Therefore, even if the substrate W is wound around the circumferential surface of the pressure copper 9, the printing alignment can be adjusted.

As shown in FIG. 4, the alignment adjustment device 80 includes a receiving side pull roller 81, a discharging side pull roller 82 provided below the receiving side pull roller 81, and a receiving side pull roller 81. It has a movable roller 83 provided between the discharge side pull rollers 82 and moving in the horizontal direction, and a guide roller 84 provided on the discharge side rather than the discharge side pull roller 82.

The substrate to be printed (W) is sequentially from the receiving side pull roller 81 to the movable roller 83, from the movable roller 83 to the discharge side pull roller 82, and from the discharge side pull roller 82 to the guide roller 84. Take turns and drive.

That is, when the substrate to be printed (W) travels in the forward direction (in the direction of the solid arrow), it is wound around the movable roller 83 from the receiving side printing unit (first printing unit 2a) through the receiving side pull roller 81. The direction is changed, it is wound around the discharge-side pull roller 82, and the travel direction is changed again, and it travels to the discharge-side printing unit (second printing unit 2b) through the guide roller 84.

When the substrate to be printed (W) runs in the reverse direction (in the direction of the dotted arrow), it is wound around the discharge side pull roller 82 from the discharge side printing unit (second printing unit 2b) through the guide roller 84 to change the running direction. Then, it is wound around the movable roller 83 and the running direction is changed again, and it travels to the location-side printing unit (first printing unit 2a) through the location-side pull roller 81.

The movable roller 83 can move between the receiving-side position 83a and the discharge-side position 83b. As the movable roller 83 moves, the length of the traveling path 85a of the substrate W to be printed between the receiving side pull roller 81 and the discharge side pull roller 82 changes. That is, since the running path 85a between the loading side pull roller 81 and the discharge side pull roller 82 has a loop shape that is folded back into the movable roller 83, the movable roller 83 moves and travels. The length of the furnace 85a changes.

Therefore, the length of the running path 85a between the loading-side pull roller 81 and the discharge-side pull roller 82 changes, so that the printing position 9a and the second printing unit 2b of the first printing unit 2a are changed. The length of the running path 85 of the substrate W to be printed between the printing positions 9a (hereinafter referred to as the running path 85 of the substrate W between the printing units) is changed.

When the movable roller 83 is at the receiving position 83a, the length of the running path 85 of the substrate W between the printing units is the shortest. When the movable roller 83 is at the discharge side position 83b, the length of the traveling path 85 of the substrate W between the printing units is the longest.

Therefore, as the movable roller 83 moves between the receiving position 83a and the discharge side position 83b, the length of the running path 85 of the substrate W between the printing units is changed. Can be adjusted. For example, the length of the running path 85 of the substrate W to be printed between the printing units is an integer multiple of the length in the vertical direction of the image to be printed.

Each of the rollers 81, 82, 83, 84 is provided in the frame body 80A of the alignment adjustment device 80, but in order to facilitate understanding, each roller 81, 82, 83, 84 is shown by a solid line.

The loading side pull roller 81 and the discharge side pull roller 82 are rotationally driven by other drive motors not shown. In addition, the receiving side pull roller 81 and the discharge side pull roller 82 are driven in forward rotation and reverse rotation in synchronization with the receiving side step back roller 6 and the discharge side step back roller 10.

The movable roller 83 is rotatably mounted on a movable body (not shown) installed movably in the frame body 80A. The movable roller 83 is moved by moving the moving body to a moving mechanism (not shown).

As a moving mechanism, a feed screw is rotated by a motor, and the feed screw is screwed into a screw hole of a moving body, a rack and a pinion are used, a cylinder is used, and the like.

Since the substrate to be printed (W) is wound in the range of 180 degrees of the circumferential surface of the movable roller 83, it is always wound in the range of 180 degrees even if the movable roller 83 moves, and the winding angle does not change, so the movable roller 83 It is possible to accurately change the length of the traveling path 85 of the substrate W to be printed between the printing units by twice the length of the moving distance. However, since it is wound in a range of 180 degrees, the area in contact between the substrate W and the circumferential surface of the movable roller 83 is wide, so that the running resistance of the substrate W increases. Therefore, when the substrate to be printed (W) runs in the forward direction, slip is likely to occur between the circumferential surface of the pull roller 82 on the discharge side and the substrate to be printed (W), and the substrate to be printed (W) travels in the reverse direction. When doing so, slip is likely to occur between the circumferential surface of the receiving side pull roller 81 and the substrate W to be printed.

Therefore, a nip roller 86 for a standing-side pull roller press-contacting the circumferential surface of the receiving-side pull roller 81 and a nip roller 87 for a discharge-side pull roller press-contact to the discharge-side pull roller 82 were installed, respectively.

And the circumferential surface of the holding-side pull roller 81 and the holding-side pull roller nip roller 86 are used to pinch the substrate to be printed (W), and the circumferential surface of the discharge-side pull roller 82 and the discharge-side pull roller nip The substrate to be printed (W) is held between the rollers 87.

Therefore, friction between the circumferential surface of the receiving side pull roller 81 and the substrate to be printed (W) increases, so that no slip occurs between the two, and the circumferential surface of the discharge side pull roller 82 and the substrate to be printed ( Since the frictional force between W) increases and no slip occurs between the two, the alignment adjustment device 80 does not cause any deviation in print alignment.

The nip roller 86 for the standing-side pull roller is movable over a position that presses against the circumferential surface of the standing-side pull roller 81 and a position spaced apart from it.

The nip roller 87 for the discharge side pull roller is movable over a position to be pressed against the circumferential surface of the discharge side pull roller 82 and a position spaced apart from it.

The mounting configuration of the nip roller 86 for a standing-side pull roller will be described with reference to FIGS. 20 and 21. The frame body 80A includes an operation-side frame 80A-1 in one direction perpendicular to the traveling direction of the substrate W and a drive-side frame 80A-2 on the other side.

The support shaft 90 is rotatably mounted while being positioned in the axial direction across the operation-side frame 80A-1 and the drive-side frame 80A-2 of the frame body 80A, and the support shaft 90 The one end in the longitudinal direction of is protruded outward from the operation-side frame 80A-1. The base end of the support arm 91 is fixed so as not to rotate and mounted at two positions spaced apart in the longitudinal direction of the support shaft 90, respectively. The nip roller shaft 92 is fixed and mounted so that the nip roller shaft 92 does not rotate across the front ends of the two support arms 91, and the nip roller 86 for the standing side pull roller is rotatable on the nip roller shaft 92. Equipped.

The nip roller moving cylinder 93 is rotatably mounted on the outer surface (surface) of the frame 80A-1 on the operation side of the frame body 80A, and the piston rod 93a of the nip roller moving cylinder 93 The base end of the lever 94 is mounted so as to be rotatable. The support shaft 90 is fixedly attached to the distal end of the lever 94 so as not to rotate.

Then, by extending the piston rod 93a of the nip roller moving cylinder 93, the lever 94 rotates clockwise in FIG. 20, and the support shaft 90 rotates at a predetermined rotation angle in the clockwise direction, and the support arm 91 ) Is rotated toward the circumferential surface of the standing-side pull roller 81, and the nip roller 86 for the standing-side pull roller moves to a position where it presses against the circumferential surface of the standing-side pull roller 81.

By reducing the piston rod 93a of the nip roller moving cylinder 93, the lever 94 rotates counterclockwise in FIG. 20, and the support shaft 90 rotates counterclockwise at a predetermined rotation angle, and the support arm ( 91) rotates in a direction away from the circumferential surface of the standing pull roller 81, and the nip roller 86 for the standing pull roller moves to a position spaced apart from the circumferential surface of the standing pull roller 81.

In addition, since the nip roller 87 for the discharge side pull roller is also mounted in this manner, the same reference numerals are assigned to the same members, and the description is omitted.

In addition, by moving the nip roller 86 for the loading side pull roller and the nip roller 87 for the discharge side pull roller to a spaced position, the job of passing the substrate to be printed (W) in the alignment adjustment device 80 before printing starts (paper Guidance work) or roller maintenance and inspection work becomes easy.

When moving the movable roller 83, move the nip roller 42 for pressing, the nip roller 86 for the loading side pull roller, the nip roller 87 for the discharge side pull roller, and the other nip rollers to separate positions. By the movement of the rollers 83, the substrate W to be printed slides along each roller and moves.

In the intermittent printing machine of the present invention, a substrate to be printed (W) is wound on the circumferential surface of the pressing member 9 of each printing unit 2a to 2f, and a nip roller 42 for pressing is formed on the circumferential surface of each of the printing units (2a to 2f). It is pressing. A nip roller 86 for a standing pull roller is press-contacted to the circumferential surface of the holding-side pull roller 81 of each alignment device 80, and a nip for a discharge-side pull roller is applied to the circumferential surface of the discharge-side pull roller 82. The roller 87 is in pressure contact.

For this reason, even if the rotation speed of the step-back roller 6 on the receiving side and the rotation speed of the step-back roller 10 on the discharge side are controlled, each printing unit (2a to 2f) and each alignment adjustment device (80) are to be printed. Since the tension of the substrate (W) is not uniform, by controlling the rotation speed of the step-back roller 6 on the receiving side and the step-back roller 10 on the discharge side, each printing unit (2a to 2f) and each alignment adjustment device (80) The tension of the substrate to be printed (W) on which is driven cannot be set to a predetermined value.

So, in the intermittent printing machine of the present invention, the step-back roller 6 on the receiving side, the presser 9 of each printing unit 2a to 2f, the pull roller 81 on the receiving side of each alignment device 80, and the pull roller on the discharge side (82), each printing unit (2a to 2f) and each alignment adjustment device (80) are driven to rotate independently, respectively, and the rotation speed of each roller is independently controlled. The tension of the printing substrate W is set to a predetermined value. This tension adjustment operation is performed sequentially for each printing unit from the first printing unit 2a toward the sixth printing unit 2f.

For example, as shown in Fig. 22, the tension of the substrate to be printed (W) running in the section (17a) between the step-back roller (6) on the receiving side and the pressing member (9) of the first printing unit (2a), 1 Tension of the substrate to be printed (W) running in the section (17b) between the pressing column (9) of the printing unit (2a) and the pull roller (81) on the receiving side, the pull roller on the receiving side (81) and the pull roller on the discharge side The tension of the substrate to be printed (W) running through the section (17c) between (82), the section (17d) between the pull-out side pull roller (82) and the pressing member (9) of the second printing unit (2b) The tension of the substrate to be printed (W) traveling, the tension of the substrate to be printed (W) traveling in the section (17e) between the pressing cylinder (9) of the second printing unit (2b) and the loading side pull roller (81), The tension of the substrate to be printed (W) traveling in the section (17f) between the receiving side pull roller (81) and the discharge side pull roller (82), the discharge side pull roller (82) and the third printing unit (2c) Tension of the substrate to be printed (W) traveling in the section (17g) between the pressing members (9), the section (17h) between the pressing members (9) of the third printing unit (2c) and the standing pull roller (81) The tension of the substrate to be printed (W) running on and the tension of the substrate to be printed (W) traveling in the section (17i) between the receiving side pull roller 81 and the discharge side pull roller 82 are respectively controlled.

In addition, the tension of the substrate to be printed (W) traveling in the section (17j) between the discharge side pull roller (82) and the pressing member (9) of the fourth printing unit (2d), the pressing force of the fourth printing unit (2d) ( The tension of the substrate to be printed (W) running in the section (17k) between the loading side pull roller (81) and the section (17l) between the loading side pull roller (81) and the discharge side pull roller (82) ) The tension of the substrate to be printed (W) traveling, and the section (17m) between the pull roller on the discharge side (82) and the presser (9) of the fifth printing unit (2e) Tension, tension of the substrate to be printed (W) traveling in the section (17n) between the pressing member (9) of the fifth printing unit (2e) and the landing-side pull roller (81), the landing-side pull roller (81) and the discharge The tension of the substrate to be printed (W) traveling in the section 17o between the side pull rollers 82, the section between the discharge side pull roller 82 and the pressing member 9 of the sixth printing unit 2f ( The tension of the substrate to be printed (W) running on 17p), the substrate to be printed (W) traveling on the section (17q) between the pressing member (9) of the sixth printing unit (2f) and the stepback roller (10) on the discharge side. ) To control each tension.

Tension control of the substrate to be printed (W) traveling in each section is to be avoided by the downstream rollers by making the rotational speed of the downstream roller in the running direction of the printed material (W) faster than the rotational speed of the upstream roller in the running direction. The delivery amount of the printed material W is made larger than the delivery amount of the printed material W of the upstream roller.

For example, when the substrate to be printed (W) is driven in the forward direction, the substrate to be printed runs in the section (17q) between the pressing member (9) of the sixth printing unit (2f) and the stepback roller (10) on the discharge side. Make the tension of (W) greater than the tension of the substrate to be printed (W) running in the section (17a) between the step-back roller (6) on the receiving side and the pressing member (9) of the first printing unit (2a), The tension of the substrate to be printed (W) traveling in the section is the substrate to be printed (W) traveling in the section (17a) between the step-back roller (6) on the receiving side and the presser (9) of the first printing unit (2a) Equal to the tension of

When the substrate to be printed (W) is driven in the reverse direction, the substrate to be printed (W) travels in the section (17a) between the step-back roller (6) on the location side and the presser (9) of the first printing unit (2a) The tension of the 6th printing unit (2f) is greater than the tension of the substrate to be printed (W) traveling in the section (17q) between the presser (9) of the sixth printing unit (2f) and the discharge side stepback roller (10), The tension of the substrate to be printed (W) to be printed is the tension of the substrate to be printed (W) traveling in the section (17q) between the pressing member (9) of the sixth printing unit (2f) and the stepback roller (10) on the discharge side. Do the same.

In the intermittent printing machine of the present invention, images were printed on the substrate W to be printed in three different states, and the deviation of the printing alignment in the vertical direction was measured for each state. The deviation of printing alignment was measured by the automatic alignment device 38 and the monitoring device 39.

In the first state, the nip roller for pressing 42 is spaced apart from the circumferential surface of the pressing copper 9, and the standing pull roller 81 can freely rotate without rotational drive, and the nip roller 86 for the standing pull roller is It is spaced apart from the circumferential surface of the receiving side pull roller 81, and the receiving side pull roller 81 is similar to the guide roller, and the discharge side pull roller 82 is freely rotated without rotational drive, and is also for the discharge side pull roller. The nip roller 87 is spaced apart from the circumferential surface of the discharge side pull roller 82 so that the discharge side pull roller 82 is placed in the same manner as the guide roller. In synchronization with the step back roller 10, it drives forward rotation and reverse rotation.

In the second state, in the state in which the nip roller 42 for the pressing copper is pressed against the circumferential surface of the pressing copper 9 in the first state, the pressing copper 9 is placed on the receiving side step back roller 6 and the discharge side step back roller 10. ) In synchronization with the forward rotation drive and reverse rotation drive.

In the third state, the nip roller 42 for pressing is pressed against the circumferential surface of the pressing copper 9, the nip roller 86 for the standing pull roller is pressed against the circumferential surface of the standing pull roller 81, and the discharge side In a state in which the nip roller 87 for pull roller is pressed against the circumferential surface of the pull roller 82 on the discharge side (the state where each nip roller 42, 86, 87 is moved to the pressing position), the pressing member 9 and the standing side The step back roller 6, the discharge side step back roller 10, the receiving side pull roller 81 and the discharge side pull roller 82 are synchronized to drive forward rotation and reverse rotation.

As a result, in the case of printing in the first state, printing in the first state is the most common, printing in the second state is the next most, and printing in the third state is the least.

In this respect, it can be seen that installing the nip rollers 42 for pressing and the nip rollers 86 and 87 for the pull rollers (the pull rollers 81 and 82) is effective in preventing deviation of the printing alignment.

In this embodiment, the alignment adjustment device 80 is provided between the printing units, but the alignment adjustment device 80 need not be provided.

In this case, a full roller is installed in the running path 85 of the substrate W between the printing units to prevent deviation and sagging in the substrate W to be printed.

For example, as shown in Fig. 23, pull rollers 110 are respectively installed near the location side and near the discharge side in the running path 85 of the substrate W between the printing units, and the substrate to be printed (W) Is wound around the circumferential surface of each pull roller 110. Each pull roller 110 is rotatably installed in the frame body 120 between the printing units. Each of the pull rollers 110 is driven by a forward rotation and a reverse rotation in synchronization with the input side stepback roller 6 and the discharge side stepback roller 10 by other driving motors not shown.

Therefore, deviation and sagging do not occur in the substrate W to be printed on the traveling path 85 between the printing units.

In addition, nip rollers 111 for pull rollers for pushing down the printed substrate W wound on the circumferential surface of each pull roller 110 to the circumferential surface of the pull roller 110 are installed, respectively, and each pull roller 110 Each of the substrates to be printed (W) is held between the circumferential surface of) and the nip roller 111 for a pull roller.

Therefore, the friction between the circumferential surface of each pull roller 110 and the substrate to be printed (W) increases, so that there is no slip between the two, and by installing the pull roller 110, a deviation in printing alignment occurs. No work.

Each of the nip rollers 111 for pull rollers is movable over a position in pressure contact with the circumferential surface of each pull roller 110 and a position spaced apart from each other.

For example, a pair of support arms 113 are fixed to the support shaft 112 rotatably mounted to the frame body 120, and the shaft 114 is fixed across the pair of support arms 113. A nip roller 111 for a pull roller is rotatably mounted on the shaft 114.

The lever 116 rotated by the cylinder 115 is fixed to the support shaft 112, and when the lever 116 rotates, the support shaft 112 rotates at a predetermined rotation angle, and the support arm 113 rotates to pull The nip roller 111 for the roller moves to a position separated from the pressure contact position of the pull roller 110. This configuration is the same as the configuration in which the pull roller nip roller of the alignment adjustment device 80 is moved.

In addition, three or more pull rollers 110 may be installed. That is, at least two pull rollers 110 may be installed.

In addition, movable rollers are installed on either or both of the two pull rollers 110 in the running path 85 of the substrate W, and between the pull roller 110 and the printing unit. It may be possible to change the length of.

Claims (9)

A printing unit having a location unit for discharging the substrate to be printed, a plurality of printing units for printing images on the substrate to be printed out from the location unit, and a discharge unit for discharging the substrate on which the image is printed,
The location unit has a location-side shock absorber for storing the printed material in a loop shape, and a location-side step-back roller driven in a forward rotation driving the printed material in a forward direction and a reverse rotation driving the printed material in a reverse direction,
The printing unit has a stamping copper, a blanket copper having an image range in contact with the circumferential surface of the stamping copper, and a non-image range not in contact with the circumferential surface of the stamping copper,
The delivery unit includes a forward rotation drive for driving the substrate to be printed in a forward direction and a stepback roller on the discharge side that is driven in reverse rotation for driving the substrate to be printed in a reverse direction, and a discharge side buffer that stores the printed material on which the image is printed in a loop shape. Have a device,
By synchronously driving the positioning-side step-back roller and the discharge-side step-back roller to rotate forward, the substrate to be printed is driven in a forward direction, and an image is printed on the substrate to be printed in the image range of the circumferential surface of the pressing copper and the blanket copper. In an intermittent printer, a substrate to be printed passes through a gap between the circumferential surface of the pressing copper and the non-image range of the blanket copper by moving in a reverse rotation in synchronization with the step-back roller on the receiving side and the step-back roller on the discharge side. In,
A mounting side guide roller and a discharge side guide roller are installed to wind the substrate to be printed passing between the circumferential surface of the press copper and the blanket copper at a predetermined winding angle on the circumferential surface of the press copper,
Installing a nip roller for pressing the substrate to be printed wound around the circumferential surface of the pressing copper to the circumferential surface of the pressing copper,
When the substrate to be printed is driven in the forward direction, the presser is driven in a forward rotation in synchronization with the stepback roller on the positioning side and the stepback roller on the discharge side. A reverse rotation drive in synchronization with the roller and the stepback roller on the discharge side,
A drying device for drying the substrate to be printed wound around the circumferential surface of the pressure copper, and a cooling device for cooling the pressure copper,
The drying device is an intermittent printing machine, characterized in that located on the upstream side in the direction of rotation of the presser than the nip roller for pressurization. The method according to claim 1,
The positioning-side guide roller and the discharge-side guide roller are such that an extension line of the positioning-side traveling path between the positioning-side guide roller and the press copper and an extension line of the discharge-side traveling path between the discharge-side guide roller and the press copper crosses. Intermittent printer installed. The method according to claim 1 or 2,
The pressing cylinder is driven forward rotation at the same constant speed as the blanket copper when the blanket copper is rotated in an image range from a printing start position to print an image on a substrate to be printed,
When the blanket copper is rotated in a non-image range from the printing end position, the rotation is stopped by deceleration forward rotation drive from the constant speed, acceleration reverse rotation drive to a predetermined reverse rotation drive speed after rotation stop, and the predetermined reverse rotation An intermittent printer in which rotation is stopped by decelerated reverse rotation from the driving speed, and accelerated forward rotation is driven to the constant speed after rotation is stopped so that the rear end of the printed image printed on the substrate to be printed and the front end of the print range of the blanket wing contact. The method of claim 3,
The curve representing the change in the rotation drive speed ratio of the decelerated forward rotation drive of the pressure copper and the curve representing the change in the rotation drive speed ratio of the accelerated forward rotation drive are linearly symmetric,
The curve representing the change in the rotation drive speed ratio of the acceleration reverse rotation drive of the pressure copper and the curve representing the change in the rotation drive speed ratio of the deceleration reverse rotation drive are linearly symmetric,
Intermittent such that the rotational drive speed ratio of the pressure copper from the constant speed to the predetermined reverse rotation drive speed and the rotation drive speed ratio from the predetermined reverse rotation drive speed to the constant speed change smoothly along a substantially U-shaped curve press. The method according to any one of claims 1 to 4,
An intermittent printing machine in which a tailoring adjustment device is provided between each of the printing units, and the alignment adjustment device is configured to adjust the printing alignment by changing a length of a traveling path of a substrate to be printed between the printing units. The method of claim 5,
The alignment adjustment device has a positioning side pull roller, a discharge side pull roller, and a movable roller, and the length of a running path between the receiving side pull roller and the discharge side pull roller is changed by moving the movable roller,
Both of the pull rollers are driven in a forward rotation driving the substrate to be printed in a forward direction in synchronization with the step-back roller on the receiving side and the step back roller on the discharge side, and a reverse rotation drive for running the substrate to be printed in the reverse direction, and An intermittent printing machine provided with nip rollers for pull rollers that pressurizes the substrate wound around the circumferential surface of the pull roller to the circumferential surfaces of both pull rollers. The method of claim 6,
The rotational speed of the positioning-side stepback roller, the rotational speed of the discharge-side stepback roller, the rotational speed of the pressing of each of the printing units, the rotational speed of the positioning-side pull roller of each of the adjustment devices, and the rotation of the discharge-side full roller Intermittent printing machine which made it possible to control the speed separately. The method according to any one of claims 1 to 4,
At least two pull rollers wound around the substrate to be printed are installed on the running path of the substrate between the printing units, and the pull rollers are synchronized with the step-back roller on the positioning side and the step-back roller on the discharge side. For a full roller, which is driven in a forward rotation to travel in a forward direction and a reverse rotation is driven to travel in a reverse direction of the substrate to be printed, the substrate to be printed, wound around the circumferential surface of each of the pull rollers Intermittent printing machine with nip roller installed. The method according to any one of claims 1 to 8,
The substrate to be printed is an intermittent printer that is a film.

Images