JPH0412852A - Multicolor cylinder press - Google Patents

Abstract

PURPOSE:To improve working efficiency by turning a turntable in the central part in a forward or backward direction with predetermined angles on the basis of the number of form plates, making a blanket unit able to reciprocate up to the turntable and a platen unit, selectively moving a plurality of inking parts and a blanket cylinder up and down, and turning the platen unit with predetermined angles in every one process. CONSTITUTION:A paper is fed to platens 17a, 17b from a paper feed part 19. Then, a blanket unit 12 is advanced and an inking part 16a is lowered, thereby applying a first color to a form plate 14a. Subsequently, a blanket cylinder 5 is lowered to transfer the ink to the printing paper on the panel 17a. The same operation is continued until the first color is finished. During the interval, although the paper is fed, the paper is not discharged in a first cycle. However, also the feed of paper is interrupted from a second cycle. When the second cycle is started, since the blanket cylinder 5 is wiped clean by an ink wiping means 15, the previous ink is dried while each panel makes one turn even in the case where many colors are sequentially overlapped. Accordingly, mixture of colors is not generated.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a multicolor printing apparatus that uses circular pressure offset printing suitable for proof printing or special printing, and that enables multicolor printing in a small space as a whole.

[Prior art]

In general, as a conventional example of this type of circular-pressure type off-sera (EI) printing apparatus, one having the configuration shown in FIG. 5 is well known. In this conventional example, 1 is a plate surface plate, and a plate or a plate 2 is placed and held on the plate surface plate. A fixed pressure plate 3 is disposed adjacent to the plate plate 1 at a predetermined interval, and a printing paper 4 is placed on the fixed pressure plate and printed by transfer by a blanket cylinder 5. This plan is torso 5
A roller 6 for the swimsuit and a roller 7 for the ink coat are arranged near the rollers, and a large group of kneading rollers 8 are disposed in contact with the rollers for supplying ink in an appropriate state. These are so-called blanket units 1 that move back and forth on a rack gear 9 together with the blanket cylinder 5.
You can say 0. In the case of multicolor printing, a plurality of the plankette units 10 are arranged in parallel, and a corresponding plurality of plate plates 1 are also required, and these plate plates are also arranged in parallel. , and a large space is required as a whole. When the blanket unit 10 is driven in this arrangement, printing must be performed by reciprocating between the plurality of plate surface plates 1 and fixed pressure plates 3 from the stop position or set position. It is designed not to happen.

[Problem to be solved by the invention]

In a conventional example with such a configuration, the plate platen 1 and the fixed pressure plate 3 are arranged at a predetermined interval, and in the case of multicolor printing, a plurality of blanket units 10 and the plate plate 1 are further arranged. Since the blanket units 10 need to be installed in parallel, the amount of movement of the blanket units 10 becomes longer, which not only results in poor workability but also increases the size of the entire device. Therefore, in the conventional example, there are problems that must be solved in order to make the device smaller and more compact and to improve workability.

[Means to solve the problem]

As a specific means for solving the problems of the conventional example, the present invention provides a turntable for placing and holding a plurality of printing plates in the center, and one blanket a and a plurality of blankets on one side of the turntable. A blanket unit equipped with an inking unit is disposed, and a pressing surface plate Uni-Soto equipped with a plurality of pressing surface plates is arranged on the other side, and the turntable is used to hold the printing plate placed and held. A rotation angle in the circumferential direction is determined based on the number, and the rotation or inversion is performed within that angle range;
The blanket unit is arranged so as to be able to move back and forth to the turntable and the pressure platen unit, and the plurality of inking units, plankets, and cylinders are configured to be able to selectively move up and down, and the blanket unit is configured to be able to move up and down selectively. The present invention provides a rotary multicolor printing device characterized in that the unit is configured to rotate by a predetermined angle for each process, and the printing paper is fed to each pressure platen of the pressure platen unit. The press plate unit 1 corresponds to the number of inks to be printed. By performing this after the rotation of the paper, the entire apparatus can be made smaller and more compact, work efficiency is improved, and color mixing does not occur in multicolor printing.

【Example】

Next, the present invention will be explained in more detail with reference to illustrated embodiments. In order to facilitate understanding, the same parts as in the conventional example are given the same reference numerals, and the details thereof will be omitted. In the figure, 11 is a plate surface unit, and a carriage-type blanket unit 12 is placed on one side of the plate surface unit at the center.
A printing apparatus is constructed by arranging the pressure platen unit 13 on the other side. In the illustrated embodiment, it is a multicolor printing apparatus for four-color printing, and the plate surface plate unit 11 has four plates or plate plates 14a to 14d disposed at equal intervals on a turntable 14, for example, plates. The first color of the plate 14a is yellow Y,
The printing plate 14b is set as magenta M, the second color, the printing plate 14c is set as the third color, C, and the printing plate 14d is set as blank B, the fourth color. And turntable 1
4 is selectively rotated 90 degrees in the direction of arrow a and set in a predetermined position so that the corresponding color can be printed. The carriage type blanket unit 12 includes one blanket cylinder 5 equipped with an ink wiping means 15, and 4
The inking parts 16a to 16d are arranged in front, back, left and right on a plane, and in these inking parts,
The inking section 16a is the first color yellow Y, the inking section 16b is the second color magenta M, the inking section IE3c is the third color C, and the inking section LED is the fourth color black B. The settings are as follows. Then, as the turntable 14 rotates or the blanket unit 12 reciprocates, the printing plate 14 on the turntable is selectively moved in the direction of the arrow.
Corresponding to a to 14d, each inking unit is capable of applying a predetermined ink onto each printing plate. The inking units 16a to IEid are, as shown in FIG. It is configured to selectively move up and down as appropriate to apply and supply a predetermined amount of ink onto each of the corresponding printing plates 14a to 14d. Therefore, each plate is connected to the turntable 14.
When the printing plate 14a or printing plate 14b reaches the position shown in the figure, the corresponding inking unit is also moved to a position where ink can be applied to the printing plate, that is, to the center, and set. blanket unit 1
2 moves forward or backward along the rack gear 9, only the corresponding inking section moves up and down to apply ink to the printing plate. The blanket cylinder 5 also selectively moves up and down to transfer the ink applied to the printing plate, and then moves forward to perform printing operations. As shown in FIG. 4, the pressure platen unit 13 has, for example, a hexagonal rotating part 17 arranged in the vertical direction, and the rotating part is rotated by 60 degrees in the direction of arrow C by a rotating shaft 18. It is configured to be able to rotate intermittently within an angular range, and pressure plates 17a to 17f are respectively attached to each hexagonal side of the rotating portion. Each of these equal-pressure surface plates has a function of holding the printed paper by, for example, suction means, and furthermore, a paper feed section 19 is arranged on one side to sequentially supply the printed paper to the equal-pressure surface plates. On the other side, there is disposed a paper discharge section 20 for discharging the printed paper. In this case, the paper feed unit 19 is configured to feed paper at a position immediately before each pressure plate comes to the printing position,
The paper ejecting section 20 is positioned so that when each pressure platen moves from the printing position to the next position, the printing paper can be ejected by appropriately releasing the holding means.

[Explanation of operation]

The multicolor printing device of the present invention having the above configuration can be driven in several ways. A preferred drive will be explained. First, a preferred drive will be described. The turntable 14 of the printing plate unit 11 is set at the position shown in the figure, and the printing plate 14a of the first color is located at the center of the blanket unit 12 in the moving direction. In step 12, the entire plate is moved downward in the figure and set so that the inking section 16a corresponding to the printing plate 14a is located at the center. During this time, in the pressure platen unit 13, a predetermined printing paper is supplied from the paper feed section 19 onto the pressure plate 17a, and rotated by 60 degrees, so that the pressure platen 17a is positioned on the upper surface and in a standby state. At the same time, a predetermined amount of printing paper is also supplied to the next pressure platen 17b. In this state, the blanket unit 12 moves forward, only the inking section 16a descends, and after applying the first color yellow Y to the printing plate 14a, the inking section L
At the same time as ea rises, the blanket unit 12 moves back and returns to the illustrated position so that the blanket cylinder 5 comes to the center, and in this position the blanket cylinder 5 descends to a position where it comes into contact with the printing plate 14a. let me,
By advancing the blanket unit 12, the printing plate 1
The ink applied to the blanket cylinder 5 rolling on the blanket cylinder 4a is transferred, and when the blanket cylinder 5 is moved forward further with the blanket cylinder 5 slightly lifted and reaches the waiting pressure plate 17a. By moving the blanket cylinder 5 downward and forward, the blanket cylinder 5 moves over the top surface of the printing paper, thereby transferring the first color, yellow Y, onto the printing paper. After the first color transfer is completed, the blanket unit 12 retreats to the initial position, but at this time, each inking section and the blanket cylinder are in an elevated state. Returning to this initial position is one process. At the same time as this one process is completed, the pressure platen unit 13 rotates 60 degrees, and the next pressure platen 17b is placed on the top surface holding the printing paper and is in a standby state, and at the same time, the next pressure platen 17b is placed in a standby state. Predetermined printing paper is also supplied. Then, the turntable 14 maintains the same position, and the blanket unit 12 operates in the same manner as in the step,
The first color is printed on the printing paper on the pressure platen 17b. In this way, the pressure platen unit 13 is sequentially rotated for each step, and the first color is printed on the printing paper on the six pressure plates arranged in the pressure platen unit. The same operation continues until the end, during which paper is fed sequentially from the paper feed section 19, but the printing paper is not ejected and is held on each pressure platen for one cycle, and from the second cycle onwards Paper is also suspended. Therefore, when the pressure platen unit 13 is equipped with six pressure plates, the turntable 14 remains in the same position until the sixth process.
The blanket unit 12 also repeats the same operation eight times. In other words, the operation is determined by the number of pressure plates in the pressure platen unit 13. When the first round ends and the second round begins, the ink wiping means 15 acts on the blanket cylinder 5 to cleanly wipe off the ink adhering to its peripheral surface. Then, the turntable 14 maintains its position, and the blanket unit 12 moves upward in the figure to move forward so that the second color inking section 16b is located in the center, and the printing plate 14b is moved forward. Magenta M is applied to the plate, and while moving backward, the blanket cylinder 5 is returned to its original position so that it is in the center. From that position, the blanket unit 12 is advanced, and the blanket cylinder 5 descends and rolls on the printing plate 14b. Then, the second color magenta M is transferred, and the second color magenta M is superimposed and printed on the printing paper on which the first color is printed on the pressure platen 17a by further advancing the printing paper. Thereafter, in the same manner, the second color is sequentially printed on the pressure plates 17b to 17f, the second rotation of the pressure plate 13 is completed, and the blanket unit 12 is retreated to the initial position. Next, when the pressure surface plate unit 13 enters the third rotation,
At the same time as the blanket unit 12 retreats, the ink wiping means 15 acts to wipe off ink adhering to the periphery of the blanket cylinder 5 and remove the ink from the turntable 1.
4 is rotated by 90 degrees, the third color printing plate 14c is placed in the position of the printing plate 14a in FIG.
They are located at positions c. At this position, the third color Noan C is applied to the printing plate 14 by the inking section 16c in the same manner as described above.
c, and transfer it by the blanket cylinder 5,
The third color is superimposed on the printing paper on which the second color has been printed on the pressure platen 17a. Furthermore, the fourth color, black B, is also rotated in the fourth rotation of the pressure surface plate unit 13.
Repeat printing as above. In any case, the pressing surface plate unit 13 is rotated for each step of the blanket unit 12. When the rotation of the pressure plate unit 13 enters the fourth round, the printing paper on which the fourth color has been overprinted is at the position of the pressure plate 17f immediately after that, that is, in the position of the pressure plate 17f in FIG. The holding of the printing paper on the pressure platen is released, and the paper discharge section 20
Paper will be ejected sequentially. Then, when the empty pressure platen comes to the position of the paper feed section 19, the turntable is returned by 90 degrees in the same way as at the start point, and the printing paper is sequentially transferred from the paper feed section to the pressure platen unit. is supplied, and the first
Printing of the colors begins. Therefore, essentially 6
Even if the sheets are printed in one set and the second and third colors are overprinted one after another, the previous ink dries while each pressure plate makes one round, and the second and third colors are overprinted. This prevents color mixing from occurring in subsequent inks. As for other drives, for example, the turntable 14 is
When rotating every process or every two processes, pressing surface plate uni...
It is conceivable that both the turn table 13 and the turn table 4 are rotated every one or two steps. Regarding these drives, the basic operations of the turntable, blanket unit, and pressure platen unit remain unchanged.

【Effect of the invention】

As explained above, the circular-pressure multicolor printing apparatus according to the present invention has a turntable in the center for mounting and holding a plurality of printing plates, and one blanket cylinder and a plurality of printing plates on one side of the turntable. a blanket unit having an inking section and a pressing surface plate unit having a plurality of pressing surface plates on the other side; The rotation angle in the circumferential direction is determined based on the angle range, and the blanket unit is arranged so as to be able to reciprocate to the turntable and pressure platen unit, and The inking unit and the blanket cylinder are configured to be able to selectively move up and down, and the pressure platen unit is configured to rotate by a predetermined angle for each process, so that the printing plate can be placed on the turntable in a plurality of By combining the inking section into the blanket unit and the plurality of pressure plates into the pressure plate unit, an excellent effect is achieved in that the entire apparatus can be made smaller and more compact. Furthermore, the printing paper is fed to each pressure platen of the pressure platen unit after rotation of the pressure platen unit corresponding to the number of inks to be printed, thereby improving work efficiency. Since one color is printed every time the pressure platen unit equipped with a plurality of pressure platens rotates once, an excellent effect is achieved in that color mixing does not occur even when a plurality of colors are sequentially printed one on top of the other.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a multicolor printing device according to the present invention, FIG. 2 is a side view of the same, FIG. 3 is a schematic side view of a blanket unit in the device, and FIG. FIG. 5, a schematic side view of the board unit, is a schematic diagram for explaining the principle of a conventional circular pressure printing device. 5... Blanket cylinder 9... Rack gear 11... Plate plate unit 12... Blanket unit 13...
- Pressing surface plate unit 14... Turntables 14a to 14d... Print plate 15... Ink wiping means lea to led... Inking units 17a to 17f... Pressing board

Claims (2)

[Claims] (1) A turntable for mounting and holding a plurality of printing plates is disposed at the center, and a blanket unit having one blanket cylinder and a plurality of inking sections is disposed on one side of the turntable. , a pressing surface plate unit having a plurality of pressing surface plates is disposed on the other side, and the rotation angle of the turntable in the circumferential direction is determined based on the number of plate plates mounted and held, The blanket unit is configured to be rotated or reversed within that angular range, and the blanket unit is arranged to be able to reciprocate to the turntable and pressure platen unit, and the plurality of inking units and the blanket cylinder can be selectively moved up and down. A circular pressure type multicolor printing apparatus, characterized in that the pressing surface plate unit is configured to rotate by a predetermined angle for each process. (2) The printing paper is fed to each pressure platen of the pressure platen unit after the rotation of the pressure platen unit corresponding to the number of inks to be printed.
1) The circular pressure multicolor printing device described above.