JPH0688401B2 - Rotary printing machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary printing machine which adopts a new printing method in rotary printing of various types of continuous printing or intermittent printing.

(Prior Art) In rotary printing, there are a continuous feed of a substrate to be printed (hereinafter simply referred to as various papers) and an intermittent feed. It is suitable for printing, the printing machine is large, and is mainly used by large-scale contractors. As shown in FIG. 6, a plurality of plate cylinders or blanket cylinders transferred from the plate cylinders on the circumference of a large-diameter impression cylinder (hereinafter In order to avoid complications, a plate cylinder is simply referred to as “the plate cylinder”, and the paper advances along the outer circumference of the impression cylinder. As shown in FIG. 7, the plate cylinder and the impression cylinder are paired up and down. There are two types, one is provided in parallel at a plurality of positions on a straight line, and the paper is moved linearly continuously for printing, and the other is intermittently fed, as in FIG. Are placed in parallel at multiple points on a straight line and rotate at a fixed position when the intermittently fed paper moves. The method shown in FIG. 8 in which the impression cylinder presses the paper against the plate cylinder to print, and the plate cylinder rolls on the paper to print when the intermittently fed paper is stationary as shown in FIG. There is a method to do.

Further, Japanese Patent Application Laid-Open No. 61-16856 according to the invention of the applicant of the present invention discloses a printing apparatus capable of reciprocatingly rolling the plate cylinder in the traveling direction of the paper when the paper which is intermittently fed is stopped.

(Problems to be Solved by the Invention) In the case of continuous printing, since the plate cylinder is the entire circumference, a plate cylinder having a circumference length matching the size of the printing plate is used for each size of the printing plate. However, there is a problem that the plate cylinder costs a lot of money, and in the intermittent feed method, the circumferential length of the plate cylinder does not have to match the size of the printing plate. , It is not necessary to prepare a large number of plate cylinders, but plate alignment is difficult, and the machine can be stopped and replaced to adjust the position of the printing plates pasted on the plate cylinder before printing can be performed normally. The printing start position must be adjusted and the trial printing must be repeated a number of times.In addition, with the method of printing when the intermittently fed paper moves, the printing plate separates from the paper at the start and end of printing. It is necessary to leave a margin of paper before and after printing, This allowance becomes the printing interval, and the interval becomes too wide, so 1
It is necessary to pull back the paper by the amount that the interval is too open each time,
It is very troublesome to adjust the movement of the plate cylinder and the timing of feeding the paper, and it takes a lot of time to prepare for normal printing such as plate alignment and timing alignment and waste of waste paper. This is a drawback, and the effective operating rate usually falls to about 50% due to the time required for such preparation work, which is extremely uneconomical.

For this reason, a small lot of printed matter adds a large amount of cost for preparation, which increases the printing cost and makes it an expensive printed matter. On the other hand, the profits of the printer are also reduced at present.

Such troublesome preparation work is particularly problematic in multi-product small lot printing, and this is a problem for many years in the industry, and the above-mentioned Japanese Patent Laid-Open No. 61-16
Issue 856 is also aimed at solving this problem, but again it was a manual adjustment.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotary printing machine which solves the above-mentioned various problems of the related art and can perform rotary printing for continuous or intermittent printing extremely accurately and quickly.

(Means for Solving the Problem) The present invention for achieving the above-mentioned object is to provide a rotary printing press for continuous printing or intermittent printing, in which a rack or a gear having a tooth row in the paper advancing direction is provided and a plate cylinder is provided. With the axis aligned with the axis of the pinion, the pinion that engages with the rack or the gear and the side surface of the pinion are installed, and the servomotor that rotates the plate cylinder independently is disposed, and the pinion is rotated. A second servomotor directly connected to the pinion shaft for moving the plate cylinder in the traveling direction or the reverse traveling direction of the paper, or rotating the pinion to move the plate cylinder to a tooth row of the rack or gear. A wheel provided with a moving means using a servo motor, a cylinder, a cam, a crank, or the like for moving the paper in the traveling direction or the reverse traveling direction of the paper. A printing press.

An inking roller device is attached to the plate cylinder described above, which constitutes a printing unit including a pinion, a servomotor, and a moving means arranged on the plate cylinder. In the case of multicolor printing, this printing unit is used. Multicolor printing is performed by arranging the required number of colors in the traveling direction of the paper and winding the printing plates for each color around each plate cylinder.

(Operation) The servo motor is driven to rotate the plate cylinder to perform inking and printing start position adjustment.

Next, we start printing, but in the same continuous printing as in the past where the entire circumference of the plate cylinder is the printing plate, the servo motor continuously rotates the plate cylinder in a fixed position in synchronization with the moving speed of the paper to print as usual. To do.

In the present invention, continuous printing is possible even when the entire circumference of the plate cylinder is not the printing plate and the printing plate is on a part of the circumference. That is, the plate cylinder is rotated by a rotation angle necessary for printing in synchronization with the progress of the material to be printed by the servomotor while moving the plate cylinder in the reverse traveling direction of the paper moving at a constant speed by operating the moving means. Immediately after that, the moving means is actuated in the reverse direction (paper advancing direction) to quickly move the plate cylinder in the printed direction by the required dimension, and during that movement, the plate cylinder is continuously rotated to When the printing is completed and the printing start position of the plate cylinder coincides with the next printing start position, the next printing is performed in the same manner as described above, and the continuous printing is performed by sequentially repeating this operation.

In this way, it is possible to perform continuous printing by pasting the printing plate only on a part of the outer circumference of the plate cylinder, which has been impossible in the past, even without preparing many plate cylinders for each size of the conventional printing plate. It is possible to economically perform continuous printing by using one plate cylinder for various types of printing plates having different sizes.

Next, in the case of intermittent printing in which printing is performed during the movement of the paper that is intermittently fed, the paper begins to move and the plate cylinder is moved in the same manner as continuous printing by the plate cylinder in which the printing plate is attached to a part of the plate cylinder described above. At the same time when printing is started while rotating the
Printing is performed while moving the plate cylinder in the direction opposite to the paper advancing direction by the moving means, and at the end of printing, the moving means acts in the reverse direction, that is, the paper advancing direction to return the plate cylinder to the original position,
Even during this return, the plate cylinder continues to rotate and inking is completed, and the printing start position of the plate cylinder is exactly one rotation from the start of printing, and the printing start position of the plate cylinder is the next printing start position on the paper where printing is completed and stopped. When the value coincides with, the paper starts to move and the next printing is performed in the same manner as above, and this operation is sequentially repeated to perform intermittent printing.

By doing so, the print end position and the next print start position can be made to substantially coincide with each other, so that it is not necessary to pull back the paper every time as in the conventional case, and printing is simplified.

Further, in the case of intermittent printing in which the plate cylinder rolls on the paper and prints when the paper that moves intermittently is stopped, the plate cylinder is moved a required distance by the moving means to roll the pinion along the rack or gear. As a result, the servo motor fixed to the pinion and the plate cylinder that directly connects the servo motor to the shaft roll together to print. Thus, after the printing is completed, the moving means is operated in the reverse direction to return the plate cylinder to the original position, and at the same time, the plate cylinder is rotated by the servo motor during the plate cylinder return to perform the inking and the printing position alignment of the plate cylinder. When the printing start position of the plate cylinder coincides with the next printing start position of the paper that has moved and stopped by one printing during the plate cylinder return, the next printing is started in the same manner as above. Intermittent printing is performed by repeating it in sequence.

As described above, continuous printing when the entire circumference of the plate cylinder is the printing cylinder, continuous printing when the printing plate is provided only on a part of the plate cylinder, which has been impossible in the past, and printing when moving the paper intermittently The four types of printing methods, that is, the intermittent printing to be performed and the intermittent printing to be performed when the intermittently moving paper is stopped have been described. In addition to the above, in the printing by the intermittent method described above, a plurality of plate cylinders arranged are By utilizing the fact that it is possible to print by rotating only the plate cylinder to be printed by controlling the motor individually and selecting rotation / non-rotation, and not printing on other plate cylinders, For example, when printing a label, the first sheet is blue, the second sheet is yellow, and the third sheet is different in color, such as red. .

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

FIG. 1 is a view showing an example of a plate cylinder. A pinion (6) meshing with a rack (5) having a tooth row in the traveling direction of a printing material on the axis of the plate cylinder (1) and the pinion (6). ) And a second servo motor (8) as a moving means are provided, and both ends of the rail (9) are laid parallel to the rack (5).
A support member (10) (10) (10
The second servomotor (8) is attached to the support member (10), and one support member (10a) rotatably supports one end of the shaft of the plate cylinder (1). There is.

As for the axial relationship, the plate cylinder (1) and the axis of the servo motor (7) are directly connected to each other, and the axis of the pinion (6) and the axis of the second servo motor (8) are directly connected as shown in FIG. And are also directly connected.

FIG. 3 is a view showing a state similar to that of FIG. 1 when the blanket cylinder (2) for offset printing is used. The blanket cylinder (2) is parallel to the plate cylinder (1) with its outer periphery in contact. Gears (3) and (4) having the same number of teeth, which are arranged and attached to one ends of the plate cylinder (1) and the blanket cylinder (2), respectively, mesh with each other to form a first line on the axis of the blanket cylinder (2). A pinion (6), a servo motor (7), and a second servo motor (8) are arranged in the same manner as the plate cylinder (1) in the figure,
Both ends thereof are supported by supports (10) (10a), and the printing plate attached to the outer periphery of the plate cylinder (1) is transferred to the blanket cylinder (2) by the rotation of the blanket cylinder (2). The cylinder (2) is in contact with the paper for printing.

(11) is an inked roller, which is provided in parallel with the plate cylinder (1) and is located between the plate cylinder (1) and the ink roller (12) as shown in FIG. It is configured to be switchable so as to contact the outer circumference with the ink roller (11) as shown by the solid line after contacting the ink roller (12) to adhere ink to the outer circumference as shown by the solid line.
The plate cylinder (1) is brought into contact with the plate cylinder (1), and the plate cylinder (1) is rotated by a predetermined rotation angle in the direction of the arrow by the servomotor (7) as shown in FIG. To do. The printing plate (1a) returns to the old position by rotating the plate cylinder in the opposite direction by the same rotation angle.

A plurality of ink rollers (12) (three in FIG. 10) rotate in contact with the outer circumference in order, and the ink is transferred from the upper ink roller to the lower ink roller in order, and the lowermost ink roller (12). Ink is transferred from 12) to the inked roller (11). In this way, by transferring the ink to the inked roller (11) via the several stages of the ink roller (12), the ink can be uniformly attached all around.

When the second servo motor is used as the moving means as shown in FIGS. 1 to 3 described above, the second servo motor (8) and the servo motor (7) can be controlled by using a computer (not shown). For example, various types of printing can be performed accurately and quickly.

4 and 5 show an example in which a cylinder (13) operated by air or hydraulic pressure is used as another moving means in place of the second servo motor in FIG. 1, and is orthogonal to the pinion shaft (6a). The cylinder (13) is placed in the direction in which the pinion shaft (6)
This pinion shaft (6a) is rotatably fitted in a),
By reciprocating the cylinder rod (13a),
While rotating the pinion (6) along the rack (5), the plate cylinder (1) on the same axis as the pinion (6) rolls via a servomotor (7).

In addition to this, a moving means using a cam, a crank, or the like can be considered, but illustration and description thereof will be omitted.

Next, FIGS. 6 to 9 are diagrams showing four conventional rotary printing methods. FIG. 6 shows a plurality of plate cylinders (1) on the circumference of a large diameter impression cylinder (16). Fig. 7 shows a continuous printing method in which the paper (15) is wound around the outer circumference of the large-diameter impression cylinder (16) and is advanced. Fig. 7 shows the lower side of a plurality of plate cylinders (1) arranged in parallel. An impression cylinder (17) is provided for each of the plate cylinder (1) and the impression cylinder (1
7 shows a continuous printing method in which the paper (15) is pulled by the paper feed roller (18) to continuously advance straight between the two, and FIG. 8 shows the plate cylinder (1) and the impression cylinder as in FIG. A plurality of sets of (17) and (17) are arranged in parallel, and the paper (15) pulled straight by the paper feed roller (18) moves intermittently only when printing, and at the time of the movement, the impression cylinder ( 17) presses the paper (15) against the plate cylinder (1) to print, and the paper (15)
FIG. 9 shows an intermittent printing method in which a pullback roller (19) pulls back and prints, and FIG. 9 shows a paper (15) that is refracted along a plurality of guide rollers (20) whose position heights are changed
A plurality of plate cylinders (1) arranged for each of the refraction sections roll on the paper (15) when the intermittently moving paper (15) is stopped on the receiving plate (21). The figure shows an intermittent printing method of printing by printing. In this case, when the paper (15) is bent and advanced, there is an advantage that the meandering of the paper (15) can be adjusted by adjusting the inclination of the guide roller (20).

As shown in FIGS. 1 to 5, the pinion (6), the servomotor (7), and the moving means are provided on the plate cylinder of the rotary printing machine for performing the rotary printing method shown in FIGS. 6 to 9 above. Second
Attach a servo motor (8) or cylinder (13), etc., and in the case of FIG. 6, align the shaft center with the large diameter impression cylinder (16) so that the diameter is close to the diameter of the large diameter impression cylinder (16). Provide a large diameter gear (not shown) and mesh with the pinion (6),
Further, in FIGS. 7, 8 and 9, a pinion (6) is provided by providing a rack (not shown) having a tooth row in the traveling direction of the paper (15).
It is something that meshes with.

Next, a method for printing by rolling the plate cylinder (1) when the intermittently moving paper (15) shown in FIG. 9 is stopped will be specifically described.

As shown in FIG. 10, the plate cylinder (1) inked on the printing plate (1a) by the inked roller (11) is aligned with the print start position indicated by the position A by driving the servomotor (7). To do. Subsequently, the moving means (here, the second servomotor (8)) is driven to move the axis of the servomotor (7) and the axis via the servomotor (7) attached to the pinion (6). Plate cylinder directly connected (1)
Is moved on the paper (15) to the printing end position of C via the position B, and the printing plate (1a) is moved to the paper (1
It is transferred to 5) and printed. At this time, the support members (10) (10a) at both ends move using the rails (9) (9a) as guides.

At the position C after printing, the inking roller (11) and the inking roller (12) are moved to the positions shown in phantom lines in FIG.
With the movement of the plate cylinder (1), the position is changed around the fulcrum (14), and the servo motor (7) is driven to ink the printing plate (1a) as described above. The paper (15) is moved by a predetermined dimension while preparing for the next printing while the ink is being applied, and the plate cylinder (1) is reversed to roll on the paper (15) from the C position to the B position to the A position. Also, the return route is printed.

Thus, when the plate cylinder (1) rolls from the A position to the C position and from the C position to the A position by the second servo motor (8) (moving means), the plate cylinder (1) is moved to the servo motor (7).
As a result, if the plate cylinder (1) moves in the opposite direction to the rolling at the same rotational speed as the rolling, but the plate cylinder (1) does not rotate, printing is not performed.

Servo motor (7) controls rotation and non-rotation of this plate cylinder (1).
By means of the above-mentioned control, it is possible to perform special printing, which has been impossible in the prior art, as described in the above section.

Next, in the printing method shown in FIG. 8 in which printing is performed when the intermittently moving paper is moved, a new printing method in which it is not necessary to pull back the overrun paper will be compared with the conventional method and the present invention based on FIG.

In FIG. 12, (I) shows the state at the start of printing, (II) shows the state at the completion of printing, and (III) shows the state at the start of the next printing. The printing plate at the start of printing and at the end of printing. Since (1a) needs to be completely separated from the paper (15), the front edge (a) of the planned printing position at the start of printing of (I)
Is a distance (S ₁ ) behind the position where printing actually starts, and the trailing edge (b ′) of printing completion at the end of printing in (II) is a distance (S ₂ ) from the position where printing is actually completed. It is necessary to overrun only, and there will be (S ₁ + S ₂ ) space between printing. To eliminate this blank, the next printing in the conventional manner pulled back by approximately the sheet (15) for each print one (S ₁ + S ₂₎ of the distance Figure 8 retraction roller (19) (III) As shown in the state at the start, the b'point was brought close to the a point.

In this respect, in the case of the present invention, the plate cylinder (1) is replaced with the impression cylinder (17) during printing.
At the same time, it is moved in the reverse traveling direction of the paper (15) by the moving means such as the second servo motor (8) and the cylinder (13) to complete the ink application to the printing plate (1a) after the printing of (II) is completed. Then, while the plate cylinder (1) makes one rotation and returns to the original print start position, the plate cylinder (1) is returned to the original position only by moving in the reverse traveling direction of the paper, and the leading edge (a) of the next print planned position is moved. This is to approach the trailing edge (b ') of completion of printing. In this case, the rotation of the servomotor (7) should be adjusted so that the peripheral speed of the printing plate (1a) changes and does not match the moving speed of the paper due to the rolling movement of the plate cylinder (1) during printing. Control is performed so as to match.

According to the method of the present invention shown in FIG. 12, it is not necessary to pull back the paper (15) in the intermittent printing, so the paper (15)
There is no need to intermittently move. Then, it becomes the same as the straight-through type continuous printing shown in FIG. 7, and even if the printing plate (1a) is not stuck on the outer circumference of the plate cylinder (1) and has the printing plate (1a) only on a part of the outer circumference, By making good use of the movement of the plate cylinder (1), continuous printing becomes possible,
This also applies to the large-diameter impression cylinder type continuous printing method shown in FIG.

Therefore, if the method of the present invention shown in FIG. 12 is utilized, it is not necessary to prepare a large number of plate cylinders (1) having different diameters in order to match the circumferential length with the printing plates (1a) of various sizes in continuous printing. With this plate cylinder, it is possible to adapt to printing plates of various sizes.

According to the above configuration, if the lot number is assigned finely (for example, 1/100 mm) on the track formed by the rack (5) or gear and the pinion (6), the servo motor can be used by a computer or controller. (7)
By controlling the second servo motor (8) (moving means), accurate plate registration can be performed quickly and various rotary printing can be easily performed.

(Effects of the Invention) According to the rotary printing press according to the present invention described above, a pinion that meshes with a rack or a gear and a servomotor are provided on the axis of the plate cylinder or the blanket cylinder, and a rack or gear that meshes with the pinion. By forming a track for moving the plate cylinder or blanket cylinder in the forward and reverse directions of the printing progress direction, and by providing a moving means for moving the plate cylinder or blanket cylinder in the forward and reverse directions along this track, By skillfully combining the movement and the forward and reverse rotation of the plate cylinder or blanket cylinder by the servo motor,
Allocation of printing position, which was troublesome in the past,
In other words, plate matching can be done very easily,
Therefore, the preparation work time is shortened, the efficiency of high-mix low-volume printing can be improved, and it can be advantageously performed. In intermittent printing, it is not necessary to pull back the substrate for each printing, and part of the plate cylinder Since it is possible to perform continuous printing by pasting printing plates only, it is not necessary to prepare a large number of plate cylinders with different diameters because it is necessary to match the size of the printing plate in continuous printing, and it is possible to economically perform continuous printing. Is obtained.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a plate cylinder in which a pinion, a servomotor, and another servomotor as a moving means are arranged on the axis of the plate cylinder, and FIG. 2 is a sectional view of a part of FIG. FIG. 3 is a side view showing an example in which a pinion, a servomotor, and another servomotor as a moving means are arranged on the blanket cylinder in the same manner as in FIG. 1, and FIG. FIG. 5 is a plan view showing an example in which a cylinder is used instead of a servo motor as a moving means in the figure, FIG. 5 is a view of FIG. 4 seen in the direction of the line VV, and FIG. 6 is a large diameter impression cylinder type. FIG. 7 is a diagram showing an outline of a continuous rotary printing method of FIG. 7, FIG. 7 is a diagram showing an outline of a straight-running continuous rotary printing method, and FIG. 8 is a diagram showing an intermittent printing method of printing when a printing material is moving. Figure showing the outline Figure 9 shows the outline of the intermittent printing method for printing when the printing material is stationary. FIG. 10 is a diagram illustrating a state in which printing is performed by rolling the plate cylinder, FIG. 11 is a diagram illustrating a state in which the printing plate of the plate cylinder is inked, and FIG. 12 is a conventional example. It is the figure which compared and showed the intermittent printing method of the method of pulling back a to-be-printed material for every one printing of this, and the printing method of this invention replaced with this method. 1 ... Plate cylinder, 1a ... Printing plate 2 ... Blanket cylinder, 5 ... Rack 6 ... Pinion, 7 ... Servo motor 8 ... Second servo motor (moving means) 13 ... Cylinder (moving means)

Claims (1)

[Claims] 1. A rotary printing press for performing continuous printing or intermittent printing, wherein a rack or a gear having a tooth row in a traveling direction of a material to be printed is provided, and an axis of the plate cylinder or blanket cylinder is aligned with an axis of the plate cylinder or the blanket cylinder. And a pinion that meshes with the rack or gear,
A servomotor is attached to the side surface of the pinion to rotate the plate cylinder or blanket cylinder independently, and the pinion is rotated to move the plate cylinder or blanket cylinder to the traveling direction of the substrate or the reverse direction. A rotary printing press, characterized in that it is provided with a moving means for moving it in the traveling direction.