JPH03281348A - Multicolor cylinder offset press - Google Patents

Abstract

PURPOSE:To immediately provide printing units by the required number corresponding to the number of inks required, especially, in a multicolor printing by a method wherein the printing units are adjacently and radially provided by the required number around a platen unit. CONSTITUTION:Printing paper 46 is pulled out from a paper supply roll 47 and passed on a platen 43 so as to be taken up on a take-up roll 48. On the platen 43, the paper is set in a fixed state, for example, by a sucking means or a tensing means. After the paper is set in this manner, a printing unit 41a is driven, and the first color ink is printed through a blanket cylinder 37a. Thereafter, a platen unit 44 is rotated, and the platen 43 is stopped at a position where printing can be made by a printing unit 41b. At this position, the printing unit 41b is driven, and the second color ink is overlappedly printed. Similarly, the successive rotation of the platen unit 44 associated with the drive of printing units 41c and 41d results in the third and fourth color inks overlappedly printed in order. As a result, a multicolor printing is accomplished.

Description

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

The present invention relates to a multicolor circular pressure offset printing device. (Prior art) As this type of multi-color circular pressure offset printing device,
- For boat fishing, the configuration schematically shown in FIG. 4 is well known as a conventional example. This conventional example of Offsera 1-printing device is as follows:
For example, it is used for four-color printing, and is composed of a long pedestal 1 and a carriage 2 that reciprocates on the pedestal, and approximately in the center of the pedestal 1 is a pressure plate for placing and fixing the paper to be printed. A platen 3 is provided, and on one side of the pressure platen 3, plate plates 4,5,6,7 for four colors are arranged in parallel at a predetermined interval in a straight line. A water base roll 8 is disposed near the end. Frame 1 on the other side of the pressure platen 3
Above, fixed ink oscillating roll group 9.10.1 for four colors.
1.12 are arranged in parallel on a straight line at a predetermined interval similar to the plate surface plate. The plate plate 4 and the fixed ink oscillating roll group 9 are used for the first color, the plate 115 and the fixed ink oscillating roll group 10 are used for the second color, and the plate plate 116 and the fixed ink oscillating roll group 11 are used for the third color. , the printing plate 17 and the fixed ink oscillating roll group 12 are respectively specified as the fourth color. The carriage 2 has ink supply roll groups 13, 14, 15, corresponding to each of the fixed ink swinging rolls.
16 are arranged in a straight line, and a blanket cylinder 17 corresponding to each color is arranged adjacent to each ink supply roll group.
．． 18, 19, and 20 are also arranged, and furthermore, a group of water rolls 21 is arranged near the end of the carriage 2. These ink supply roll groups and blanket cylinders are also specified for each of the four colors of ink. One of the ink supply roll groups is explained with reference to FIG. 5. It is composed of a carriage ink swinging roll 22, an ink kneading roll group 23, and an ink roll group 24, and the ink application is performed during the process. In addition, each of the inked rolls 24 and the fixed ink oscillating roll group 9 are in contact with each other. Further, as shown in FIG. 6, the water roll group 21 is composed of a water distribution roll 25, a water roll group 26, and a water roll group 27. In the conventional example having the above configuration, when actually performing multicolor printing, when a predetermined sheet of paper is placed on the pressure platen 3 and the carriage 2 is located on the right side in the figure, each ink supply roll is For inking each of the groups 13 to 16, a predetermined ink is uniformly applied to the roll group 24 in a sufficiently kneaded state, and the carriage 2 is moved leftward from this position. During this movement, each of the ink supply roll groups 13 to 16 and the blanket cylinders 11 to 20 are moved in a slightly lifted state, and the roll group 21 in the case of water application is also slightly lifted and moved, but it is fixed! When it exceeds 83, it quickly descends, and during water application, the Molton roll group 26 comes into contact with plate plates 4 to 7 in sequence and rolls, applying water to the top surface of each plate plate in sequence. Provide a specified level of moisture. Then, when each ink supply roll group 13 to 16 comes to a position corresponding to each plate surface plate 4 to 7, it is lowered, and each ink supply roll 24 is transferred over the corresponding plate surface plate, so that Apply ink to a predetermined position on each platen. At the same time as this operation, the water maker Molton roll group 26 also comes into contact with the water base roll 8 to replenish the water lost by coating the plate surface plate first. After applying ink onto each plate surface plate, each ink supply roll group 13 to 16 rises, and each blanket cylinder 17 to 20 descends in its place, and the carriage 2 moves to the right, so that the blanket cylinder transferred on the printing plate,
After the ink applied on the corresponding plate surface plate was transferred and removed, the receiver was raised, and at the position where each blanket cylinder approached the pressure surface plate 3, the understitching was sequentially performed and the blankets were placed on the pressure surface plate. As each ink moves on the paper, the ink that was picked up first is transferred sequentially, resulting in multicolor printing. That is, the blanket cylinder 17 transfers the first color, the blanket cylinder 18 transfers the second color in an overlapping manner, and in the same way, the third and fourth colors are transferred in an overlapping manner. After the transfer, each blanket cylinder is raised one after another, and when the carriage 2 is positioned on the right side of the pedestal 1, each of the ink supply roll groups 13 to 16 is lowered, and the ink supply rolls 13 to 16 are lowered, and the respective colors are applied at each position as in the beginning. Roll 2 with each ink
4 is applied. Of course, the roll group 21 is raised simultaneously with the rightward movement of the carriage 2. [Problems to be Solved by the Invention] In the conventional multicolor printing circular press type offset medium side device, each plate surface plate 4 to 7 and a fixed ink oscillating roll group 9,
In addition, since the ink supply roll groups 13 to 16 are arranged in a straight line, a long frame 1 is required, and the reciprocating carriage 2 is also relatively long, and moreover, the ink supply rolls arranged in one carriage require a long frame 1. The vertical movement of the supply roll groups 13 to 16 and the blankets WA17 to WA20 at each position is also driven.
Since the process is performed sequentially in one round trip, it becomes complicated, and the actual situation is that it is impossible to miniaturize the entire process, and a large installation space must be taken up. Also, in the case of multicolor printing, it is not always four colors, but at least two colors.
Since there are several colors, and there may be more than five colors, it is necessary to secure the maximum planned installation space for the plate surface and the size or length of the carriage, making the entire device even larger. On the other hand, even in the case of two-color printing, the printing process,
That is, the reciprocating movement of the carriage remains the same, and in two-color printing, unnecessary movement occurs, resulting in poor workability. Furthermore, if the color of the multicolor printing ink is changed or the order of printing is changed, the equipment must be stopped and all ink adhering to each roll and blanket cylinder etc. must be wiped off and cleaned. Not only does this work require a lot of time, but the printing device cannot be driven until the work is completed, which also results in poor work efficiency. Therefore, in conventional multicolor circular pressure offset printing equipment, it is necessary to downsize the entire equipment to accommodate the installation space, eliminate unnecessary operations, and perform work when changing ink colors or changing the order of printing weights. There are issues that need to be solved to improve gender.

[Means to solve the WR problem]

As a specific means for solving the problems of the conventional example, the present invention provides a printing unit including at least an ink supply roll group, a blanket cylinder, a water roller and a plate surface plate, and a paper supply/discharge function. and a rotatable pressure platen unit equipped with a pressure platen, and a required number of printing units are removably disposed adjacent to and radially around the pressure platen unit. The present invention provides a multicolor printing circular pressure offset printing device, and the paper feeding and discharging function of the pressure platen unit is configured to continuously feed and wind up a roll of paper to be printed, and the pressure platen unit By allowing the printing units to move back and forth on predetermined rails, the space occupied as a whole is reduced, and by rearranging or increasing or decreasing the number of printing units as necessary, the printing units can be moved back and forth on designated rails. The order of multicolor printing or overprinting can be quickly changed.

【Example】

Next, the present invention will be explained in more detail with reference to an illustrated embodiment. In FIG. 1, 31 is a group of ink supply rolls, which includes a group of calling rolls 33 that draws ink from an ink fountain 32; It is composed of a kneading roll group 34, an ink swinging roll group 35, and an inking roll group 36. And this ink supply roll group 3
A blanket cylinder 37 is disposed close to 1, and
For water marking, a roll 38 and a plate plate 39 are arranged at appropriate intervals, and a water base roll group 40 is further arranged. Incidentally, the ink pushing roll l! The ¥35 may be fixedly placed at the bottom as shown by the imaginary line. Each of these components is substantially the same as the configuration of each part in an offset printing device used for boat fishing. A major feature of the present invention is that all of these are included and made independent as one printing unit 41. The printing units configured in this manner can be used in the necessary number of printing units when overprinting multiple colors in multicolor printing (four colors in the illustrated embodiment), as in the embodiment shown in FIGS. 2 and 3.
That is, the four printing units 41a to 41d are arranged radially with respect to a pressure platen unit 44 having a pressure platen 43 via predetermined rails 42, respectively. In this case, since the four printing units 41a to 41d are arranged radially, each printing unit 111J39a is connected to the printing unit 39d and the blanket cylinder 39d.
7a to 37d are positioned so as to face the pressure platen 43, respectively. And the rail 42f! Pressure plate unit 4
It is arranged in a roughly + shape compared to 4, but if this is changed to 5
When one or more printing plates 1 to 1 are to be arranged, the rails 42 are arranged at equal intervals and in a radial pattern with respect to the pressure platen unit 44. The pressure platen unit 44 rotates itself, and has a paper feeding function and a paper ejecting function in addition to the pressure platen 43. That is, the pressure platen unit 44 is rotatably installed on a suitable rotating base 45, and its rotation allows the pressure platen 43 to print on each of the radially arranged printing units 41a to 41d. The rotation stop is configured to accurately detect a set position using, for example, a position/lateral ratio sensor, and the above-mentioned During rotation, each printing unit retreats on the rail 42 so as not to interfere with the rotation, and after rotation, each print unit moves forward and is set at the set accurate position. Further, as the paper feeding and paper ejecting functions, for example, the printing paper 46
is on a roll, and is drawn from the inside of the pressure platen unit 44 over the pressure platen 43 and into the pressure platen unit again, and there is a paper feed roll on one end side. 47 is arranged, and a winding roll 4 is provided on the end side of the used side.
8 are arranged. In this way, by combining a plurality of printing units radially around the circumferential surface of the pressure platen unit, a multicolor printing circular pressure type offset m-device is formed. Therefore, each of these units is preliminarily formed to be combinable both dimensionally and structurally on the premise that they will be connected.

[Explanation of operation]

In the embodiment described above, the printing paper 4 is fed from the paper feed roll 47 side.
6, pass it over the pressure platen 43, and then pull out the take-up roll 4.
The paper is fed so as to be wound up on the 8 side, and the pressure surface plate 43
At the top, it is set in a fixed state, for example by suction means or tension means. After setting in this way, first, the printing unit 41a is driven to print the first color via the blanket cylinder 37a. Next, the pressure platen unit 44 is rotated to stop the pressure platen 43 at a position where the printing unit 41b can print, and at that position, the printing unit 41b is driven to print the second color overlappingly in the same manner as described above. . In this way, by sequentially rotating the pressure platen unit 44 and driving the printing units 41c and 41d, the third color and the fourth color are sequentially printed one on top of the other, thereby performing multicolor printing. After the scheduled series of overlapping printing is completed, the pressure platen unit 44 returns to the initial position, and at the same time drives the paper feed roll 47 and take-up roll 48 to move the rolled printing paper 46 into a predetermined position. Roll up the length and set a new paper surface to be printed next on the pressure setting 1!43. In this way, scheduled multicolor printing is performed each time the pressure platen unit 44 rotates once. In the rotation operation of the pressure platen unit 44, the pressure platen 43 rotates once in correspondence with each printing unit, but predetermined multi-color printing can be performed by rotating 90'' and reversing. That is, at the first set position, for example, the printing units 41a and 41c are driven to print the first color and the second color in an overlapping manner, and then the pressure platen unit 44 is rotated to a position where the printing unit 41b can print. At this time, the printing units 41b and 41d print the third color and the fourth color. Then, if the printing paper is reversed by 90 degrees and returned to its original position, the printing paper is fed and the next printing is performed. Multi-color printing can be performed quickly by rotating and reversing 90' without positioning each position in one rotation, further improving work efficiency. A plurality of printing units 41a to 41d formed by
4, and by arbitrarily setting these combinations, it is possible to easily perform multicolor printing as desired or single color printing if necessary. By attaching or detaching the printing unit, you can increase or decrease the number of colors even during printing, and you can easily change the order of colors for overprinting or to other colors. It can be done. [Effects of the Invention] As explained above, the multicolor circular pressure offset printing apparatus according to the present invention includes a printing unit including at least an ink supply roll group, a blanket cylinder, a water supply roll, and a plate surface plate; It is composed of a rotatable pressure platen unit having a sheet discharge function and a pressure platen, and a required number of the impression units are arranged adjacent to and radially around the pressure platen unit 1-. By doing this, not only can the necessary number of printing units be immediately arranged in response to the number of inks required, especially for multicolor printing, but also the order of the inks for overprinting or the number of inks can be adjusted. The excellent effect is that the type can be changed immediately by simply rearranging the printing unit. In addition, the paper feeding and discharging function of the pressure platen unit is configured to continuously feed and wind up a roll of paper to be printed, and the printing unit is arranged relative to the pressure platen unit on a predetermined rail. By making it radial so that it can move back and forth, it has the advantage of being smaller and more compact as a whole, which occupies less space for installation. Furthermore, in multicolor printing, if the printing unit is used specifically for each color, it is possible to rearrange or increase or decrease the ink colors as necessary, and to change the order of overlaying or the colors. Even in this case, there is no need for the conventional roll cleaning work, and even if the combination of multicolor printing is different, it can be handled immediately, and workability is significantly improved, which is an excellent effect.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram schematically showing the main parts of a multi-color circular pressure offset printing apparatus according to the present invention, that is, the printing unit part, and FIG. 2 is a multi-color circular pressure offset printing apparatus according to an embodiment of the present invention. FIG. 3 is a schematic cross-sectional view taken along the line ■ to ■ in FIG. 2; FIG. 4 is a schematic side view of a conventional multicolor circular pressure offset printing device;
5 is an enlarged view of the portion indicated by V in FIG. 4, and FIG. 6 is an enlarged view of the portion indicated by Vl in FIG. 4. 31... Ink supply roll group 37. 37a to 37 (j... Blanket cylinder 38...
・・・・Roll 39.39a ~ 39d for water application - ・・Plate plate 41.41a ~
41 (j...Printing unit 42...Predetermined rail 43...-Press plate 44...Press plate unit 45...Rotating frame 46... ... Roll-shaped printing paper 47 ... Paper feed roll 48 ... Winding roll

Claims (3)

[Claims] (1) A printing unit that includes at least a group of ink supply rolls, a blanket cylinder, a dampening roll, and a plate plate; and a rotatable press plate unit that has a sheet feeding and discharging function and is equipped with a press plate; A multicolor printing circular pressure type offset printing apparatus, characterized in that a required number of printing units are removably disposed adjacent to and radially around the pressure surface plate unit. (2) The paper feeding and discharging function of the pressure platen unit is such that it continuously feeds and winds up a roll of paper to be printed.
1) The multicolor circular pressure offset printing device described above. (3) The arrangement of the printing unit with respect to the pressure platen unit is as follows:
Claim (1): The claim is capable of moving back and forth on a predetermined rail.
, (2) The multi-color printing circular pressure offset printing device.