JP2015217522A - Cylinder device of printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder device of a printer which has a simple configuration and can adjust a printing pressure in at least three cylinders with a high accuracy.SOLUTION: A cylinder device of a printer includes: an assembly plate cylinder 22 which is so supported as to approach and be separated from an assembly rubber cylinder 21 and a rubber cylinder 19; an eccentric inner metal 42 which rotatably supports the assembly plate cylinder 22, and so rotates the assembly plate cylinder 22 that the assembly plate cylinder 22 approaches and is separated from the assembly rubber cylinder 21; a hydraulic cylinder 45 for rotating the eccentric inner metal 42; an eccentric outer metal 43 which pivots the eccentric inner metal 42 and so rotates the eccentric inner metal 42 that the assembly plate cylinder 22 approaches and is separated from the rubber cylinder 19; a drive unit 46 for rotating the eccentric outer metal 43; a stopper 49 provided on a frame 44 of this device; and an adjusting bolt 47 which is provided on the eccentric inner metal 42, and contacts the stopper 49 when the assembly plate cylinder 22 makes contact with the assembly rubber cylinder 21.

Description

  The present invention relates to a cylinder device of a printing press.

  In the printing of securities, intaglio, letterpress and lithographic printing methods are combined in a complex manner for the purpose of preventing counterfeiting. When printing portraits and face values, intaglio printing is used to obtain delicate and sharp image lines. When printing serial numbers, letterpress printing that can print sharp characters that are easy to read is used to print background patterns. In case. Lithographic (offset) printing suitable for multicolor printing is used. Further, Zammel printing, which is a special printing method, is adopted as part of the background pattern.

  In Zammel printing, for example, after inks of different colors are respectively attached to a plurality of partial plate cylinders, the inks attached to the partial plate cylinders are assembled through a collective rubber cylinder and a collective plate cylinder, The image is transferred to paper passing between the rubber cylinder and the impression cylinder. As a result, Zammel printing has the feature that not only the color can be changed from the middle of the image line, but also misprinting at the part where the color changes does not occur at all. The effect of prevention is increasing.

No. 7-291 Japanese Patent No. 4611493

  By the way, in the Zammel printing press, after adjusting the printing pressure between the collecting rubber cylinder and the collecting plate cylinder, the printing pressure is adjusted between the collecting plate cylinder and the rubber cylinder. In other words, the printing pressure between the three cylinders must be adjusted, so the printing pressure adjustment mechanism including the eccentric bearing and its driving device becomes complicated, and the printing pressure may not be adjusted with high accuracy. .

  A printing pressure adjustment mechanism that performs printing pressure adjustment and position adjustment between two cylinders is disclosed in Patent Document 2. In the printing pressure adjusting mechanism, the play (gap) between the eccentric bearings is suppressed by adjusting the printing pressure and the position between the two cylinders using a double eccentric bearing.

  Therefore, the present invention applies a printing pressure adjustment mechanism using double eccentric bearings, and can print the printing pressure with high accuracy in at least three cylinders with a simple configuration. An object of the present invention is to provide a torso device.

A cylinder device for a printing press according to the first invention for solving the above-described problems is provided.
A second cylinder supported by a pair of support members so as to be able to approach and separate from the first cylinder and the third cylinder;
A pair of first eccentric bearings rotatably supporting both ends of the second cylinder and rotating the second cylinder close to and away from the first cylinder;
First driving means for rotating the pair of first eccentric bearings;
A pair of the first eccentric bearings are pivotally supported and rotated to bring the second barrel close to and away from the third barrel, and a pair of second bearings pivotally supported by the pair of support members. Eccentric bearings of
Second driving means for rotating the pair of second eccentric bearings;
A contact member provided on the pair of support members;
A contact portion provided in a pair of the first eccentric bearings, and abutting against the abutting member when the second cylinder comes into contact with the first cylinder by driving of the first driving means; It is characterized by providing.

A cylinder device for a printing press according to a second invention for solving the above-described problems is provided.
The contact member is capable of adjusting a rotation amount of the first eccentric bearing when contacting the contact portion.

A cylinder device for a printing press according to a third invention for solving the above-mentioned problem is as follows.
The rotation center of the first eccentric bearing and the rotation center of the second eccentric bearing are opposite to the contact points of the second cylinder and the third cylinder with respect to the rotation center of the second cylinder. Placed on the side
The rotation center of the second eccentric bearing is arranged on the opposite side of the contact point between the first cylinder and the second cylinder with respect to the rotation center of the first eccentric bearing. To do.

A cylinder device for a printing press according to a fourth invention for solving the above-described problem is
In a state where the contact member and the contact portion are in contact,
The first eccentric bearing is constantly given a force in the direction in which the second cylinder is separated from the third cylinder, with the contact member as a rotation center, by the first driving means. And
The first eccentric bearing with respect to the second eccentric bearing and the second eccentric bearing with respect to the support member; and a rotation center of the third cylinder and a rotation center of the second cylinder. It is characterized in that it is pressed in the direction of the approximate extension of the straight line connecting the two.

A cylinder device for a printing press according to a fifth invention for solving the above-described problem is
The third barrel is supported by the support member via a fourth eccentric bearing that is rotated by a fourth driving means.

A cylinder apparatus for a printing press according to a sixth invention for solving the above-described problems is
A fourth cylinder supported so as to be able to approach and separate from the third cylinder;
The third cylinder is rotated by the fourth driving means so that the third cylinder can be attached to and detached from the second cylinder, and can be attached to and detached from the fourth cylinder. The printing pressure is adjustable.

  Therefore, according to the cylinder device of the printing press according to the present invention, the adjustment is performed by the rotation of the first eccentric bearing and the contact between the contact portion of the first eccentric bearing and the contact member on the support member side. The printing pressure between the second cylinder and the third cylinder is adjusted by the rotation of the second eccentric bearing while maintaining the printing pressure between the first cylinder and the second cylinder. Therefore, the printing pressure can be adjusted with high accuracy with a simple configuration.

  Further, the first eccentric bearing is in contact with the second eccentric bearing by the contact between the contact member provided on the support member side and the contact portion of the first eccentric bearing, and the second eccentric bearing. Press against the support member in the same direction, so that the play (gap) generated between the first eccentric bearing, the second eccentric bearing and the support member can be removed, so that printing is performed with high accuracy. be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall configuration diagram of a Zummel printing press that employs a cylinder device for a printing press according to the present invention. It is an enlarged view of the drum apparatus in a zanmel printing part. It is sectional drawing of the eccentric bearing structure of a collective plate cylinder. It is the figure which showed the operation | movement of the collective cylinder.

  Hereinafter, a cylinder device of a printing press according to the present invention will be described in detail with reference to the drawings.

  The Zummel printing machine shown in FIG. 1 is a printing machine that combines a Zummel printing unit and a double-sided offset printing unit.

  That is, as shown in FIG. 1, the Zammel printing machine includes a supply unit 10, a Zammel printing unit 11, a double-sided offset printing unit 12, and a discharge unit (not shown) from the upstream side to the downstream side in the paper conveyance direction. Are arranged in order. Thus, after the paper supplied from the supply unit 10 is transferred to the impression cylinder 18 of the Zammel printing unit 11 through the swing 13 and the four transfer cylinders 14, 15, 16, and 17 one by one. The pressure drum 18 and the rubber drum 19 are supplied.

  In the Zammel printing section 11, three partial plate cylinders 20, an aggregate rubber cylinder 21, an aggregate plate cylinder 22, a rubber cylinder 19, and an impression cylinder 18 are arranged in order from the bottom to the top. At this time, the cylinder arrangement in the Zammel printing unit 11 includes a straight line connecting the rotation center of the impression cylinder 18 and the rotation center (R1 described later) of the impression cylinder 18, and the rotation center of the rubber cylinder 19 and the rotation of the collecting plate cylinder 22. An angle formed by a straight line (L1 which will be described later) connecting the center (R2 which will be described later) is approximately 90 °, and a line connecting the rotation center of the rubber cylinder 19 and the rotation center of the collecting plate cylinder 22 and the assembly The angle formed by the straight line connecting the rotation center of the rubber cylinder 21 and the rotation center of the collecting plate cylinder 22 is approximately 90 °.

  The image line on each partial plate cylinder 20 is transferred to the collective plate cylinder 22 through the collective rubber cylinder 21, and then further transferred to the rubber cylinder 19 and the impression cylinder through the rubber cylinder 19. 18 is printed on the paper supplied between the two. In addition, the code | symbol 23 shown in FIG. 1 is an ink supply apparatus which supplies the ink of a different color with respect to the three partial printing cylinders 20, respectively.

  Here, the paper subjected to Zammel printing is transferred from the impression cylinder 18 to the impression cylinder 24 of the surface offset printing unit 12a of the first color (first stage) in the double-sided offset printing unit 12, thereby being offset on the surface. Printing is applied. Further, the paper having the offset printing on the front surface is transferred from the impression cylinder 24 to the impression cylinder 29 of the back offset printing unit 12b of the first color (first stage), whereby the offset printing is performed on the back surface. It is like that.

  The surface offset printing unit 12a includes a double duct type ink supply device 26 having two ink fountains 25a and 25b, a plate cylinder 27, a rubber cylinder 28, and an impression cylinder 24. The Zammel printing machine is provided with a plurality of surface offset printing units 12a. In each surface offset printing unit 12a, a plate is provided on the surface of the paper supplied between the impression cylinder 24 and the rubber cylinder 28. An image line of a predetermined color transferred from the cylinder 27 is printed.

  On the other hand, the back surface offset printing unit 12b includes a double duct type ink supply device 31 having two ink fountains 30a and 30b, a plate cylinder 32, a rubber cylinder 33, and an impression cylinder 29. The Zammel printer is provided with a plurality of back surface offset printing units 12b. In each back surface offset printing unit 12b, a plate is provided on the back surface of the paper supplied between the impression cylinder 29 and the rubber cylinder 33. An image line of a predetermined color transferred from the cylinder 32 is printed.

  As described above, in the Zammel printing press, the front surface printing and the back surface printing are alternately performed by bringing the impression cylinders 24 and 29 of the adjacent offset printing units 12a, 12b,... It is configured. The paper subjected to the final offset printing is discharged from the impression cylinder 29 of the back offset printing unit 12b of the final color and then stacked on the pile of the discharge unit.

  As shown in FIG. 2, the rubber cylinder (third cylinder) 19 has a pair of left and right machine frames (supports) with end shafts 19 a on both the left and right sides via an eccentric metal (fourth eccentric bearing) 40. Member) 44 is rotatably supported. The rubber cylinder 19 is configured such that the eccentric metal 40 is rotated clockwise or counterclockwise in FIG. 2 by the drive of the drive device (fourth drive means) 41, whereby the collective cylinder (second In addition to attaching / detaching to / from the cylinder 22 and attaching / detaching to the impression cylinder (fourth cylinder) 18, the printing pressure between the impression cylinder 18 can be adjusted.

  That is, the rotation center F1 of the eccentric metal 40 is disposed on the opposite side of the contact point between the rubber cylinder 19 and the collecting plate cylinder 22 with respect to the rotation center R1 of the rubber cylinder 19. Thereby, the rotation center R1 of the rubber cylinder 19 is the first and fourth quadrants of the orthogonal coordinate system centered on the rotation center F1 of the eccentric metal 40 (in other words, the rubber cylinder 19 is the impression cylinder 18 and the collecting plate cylinder 22). The side that approaches and separates from both of them is rotated eccentrically.

  The drive device 41 is disposed below the rubber cylinder 19, and is a servo motor 41d supported on the machine frame 44 via a bracket (not shown), and a transmission shaft 41a to which the rotational force of the servo motor 41d is transmitted. The lever 41b is formed integrally with the transmission shaft 41a, and the rod 41c is interposed between the tip of the lever 41b and the flange 40a of the eccentric metal 40 and is rotatably supported by them. Yes.

  Further, as shown in FIGS. 2 and 3, the collective plate cylinder 22 has end shafts 22 a on both the left and right sides, an eccentric inner metal (first eccentric bearing) 42 and an eccentric outer metal (second eccentric bearing) 43. Is supported by a pair of left and right machine frames 44 via a pair of left and right double eccentric metals.

  The collective cylinder 22 is configured such that the eccentric inner metal 42 rotates clockwise or counterclockwise in FIG. 2 by driving a hydraulic cylinder (first drive means) 45, thereby causing the collective rubber cylinder (first 1), and the eccentric outer metal 43 is rotated clockwise or counterclockwise in FIG. 2 by the driving of the driving device (second driving means) 46, so that the rubber The printing pressure with the body 19 can be adjusted.

  That is, the rotation center M of the eccentric inner metal 42 and the rotation center F2 of the eccentric outer metal 43 are on the opposite side of the contact point between the collecting plate cylinder 22 and the rubber cylinder 19 with respect to the rotating center R2 of the collecting plate cylinder 22. Has been placed. Further, the rotation center F 2 of the eccentric outer metal 43 is disposed on the opposite side of the contact point between the collecting plate cylinder 22 and the collecting rubber cylinder 21 with respect to the rotation center M of the eccentric inner metal 42. Thereby, the rotation center R2 of the collective plate cylinder 22 is the second and third quadrants of the orthogonal coordinate system centered on the rotation center M of the eccentric inner metal 42 or the rotation center F2 of the eccentric outer metal 43 (in other words, the set The plate cylinder 22 rotates eccentrically on the side where the plate cylinder 22 approaches and separates from both the rubber cylinder 19 and the aggregate rubber cylinder 21.

  The head portion of the hydraulic cylinder 45 is supported by being positioned above the collective plate cylinder 22 on the inner surface of the machine frame 44. A flange portion 42 a is formed on the outer peripheral portion of the frame of the eccentric inner metal 42 so as to bulge toward the contact point between the rubber cylinder 19 and the collecting plate cylinder 22, and the tip of the piston rod of the hydraulic cylinder 45. Is supported by the flange portion 42a.

  On the other hand, the driving device 46 is disposed below the collective plate cylinder 22 and is transmitted to the machine frame 44 via a bracket (not shown), and the rotational force of the servo motor 46d is transmitted. A transmission shaft 46a, a lever 46b formed integrally with the transmission shaft 46a, and a rod 46c interposed between the tip of the lever 46b and the flange portion 43a of the eccentric outer metal 43 and rotatably supported by them. It is composed of

  In the driving device 46, the pair of left and right eccentric outer metals 43 are driven by a single servo motor 46d via a transmission shaft 46a that is rotatably mounted between the pair of left and right machine frames 44. It is like that.

  Further, a flange portion 42b is formed on the outer peripheral portion of the frame of the eccentric inner metal 42, and the phase of the flange portion 42b is shifted by about 90 ° from the flange portion 42a toward the upper side of the collecting plate cylinder 22. Placed in position. An adjustment bolt (contact portion) 47 is assembled to the flange portion 42b, and the adjustment bolt 47 is screwed so as to be able to advance and retreat in the direction in which the plate cylinder 22 approaches and separates from the rubber cylinder 19. Has been.

  On the other hand, a stopper (contact member) 49 is disposed above the collecting plate cylinder 22 outside the machine frame 44. The stopper 49 is rotatably supported by the machine frame 44 via an eccentric metal (third eccentric bearing) 48, and the adjustment bolt 47 is used when the eccentric inner metal 42 rotates counterclockwise. The stopper 49 comes into contact with the stopper 49. Accordingly, when the adjusting bolt 47 and the eccentric metal 48 come into contact with each other, the eccentric rubber 48 is rotated, the adjusting bolt 47 is advanced or retracted, or both are performed, and thereby the collective rubber cylinder 21 and The printing pressure between the collecting plate cylinders 22 can be finely adjusted.

  The pair of left and right eccentric metals 48 are driven by one servo motor (third drive means) 51 via a transmission shaft 50 and a gear that are horizontally mounted between the pair of left and right machine frames 44. It has come to be.

  Therefore, as the operation of the drum device in the Zammel printing unit 11, first, the eccentric inner metal 42 is rotated counterclockwise in FIG. As a result, the eccentric inner metal 42 is largely rotated until the adjustment bolt 47 contacts the stopper 49 (see the large right arrow in FIG. 2), and the collective plate cylinder 22 comes into contact with the collective rubber cylinder 21.

  Next, by driving the drive device 41, the eccentric metal 40 is largely rotated counterclockwise in FIG. 2 (see the large left arrow in FIG. 2). As a result, the rubber cylinder 19 comes into contact with the impression cylinder 18 and the collecting plate cylinder 22.

  Further, by driving the drive device 41, the eccentric metal 40 is rotated slightly clockwise or counterclockwise in FIG. 2 (see the left small arrow in FIG. 2). Thereby, the printing pressure between the rubber cylinder 19 and the impression cylinder 18 is adjusted according to the paper thickness while maintaining the wearing state between the rubber cylinder 19 and the collective cylinder 22.

  Then, by driving the servo motor 51, the eccentric metal 48 is rotated clockwise or counterclockwise in FIG. As a result, the eccentric inner metal 42 rotates slightly clockwise or counterclockwise in FIG. 2 (see the small right arrow in FIG. 2), and between the collecting plate cylinder 22 and the collecting rubber cylinder 21. The printing pressure is adjusted. At this time, the printing pressure between the collecting plate cylinder 22 and the collecting rubber cylinder 21 may be adjusted by moving the adjusting bolt 47 in the eccentric inner metal 42 forward and backward.

  Finally, by driving the drive device 46, the eccentric outer metal 43 is rotated slightly clockwise or counterclockwise in FIG. 2 (refer to the downward small arrow in FIG. 2). As a result, as shown in FIGS. 4A and 4B, the short axis 22a of the collective plate cylinder 22 moves horizontally from the position of the solid line to the position of the broken line, and the collective plate cylinder 22 and the rubber cylinder 19 are moved. The printing pressure between is adjusted.

  At this time, as shown in FIG. 4 (c), the contact state between the stopper 49 and the flange portion 42b (adjustment bolt 47) of the eccentric inner metal 42 is maintained. The printing pressure between 22 and the aggregate rubber cylinder 21 does not change. That is, as shown in FIG. 4D, when the eccentric outer metal 43 rotates around the rotation center F2, the horizontal line, the rotation center R2 of the collective plate cylinder 22 and the rotation center M of the eccentric inner metal 42 are obtained. The angle between the connecting line segments is almost unchanged.

  When the adjustment bolt 47 and the stopper 49 are in contact with each other, the eccentric inner metal 42 is always given counterclockwise turning force about the stopper 49 by the pressing force of the hydraulic cylinder 45. Will be.

  Accordingly, a pressing portion is formed in which the eccentric inner metal 42 presses the eccentric outer metal 43 at the position P1 shown in FIG. 2, and the eccentric outer metal 43 is formed at the position P2 shown in FIG. A pressing portion that presses the machine frame 44 is formed. At this time, the pressing portions P1 and P2 are located on a substantially extended line of a straight line L1 connecting the rotation center R1 of the rubber cylinder 19 and the rotation center R2 of the collective plate cylinder 22.

  As described above, the direction in which the eccentric inner metal 42 presses the eccentric outer metal 43 and the direction in which the eccentric outer metal 43 presses the machine frame 44 are the same direction (the collective plate cylinder 22 is separated from the rubber cylinder 19). Therefore, the play (gap) generated between the machine frame 44, the eccentric outer metal 43, and the eccentric inner metal 42 can be eliminated. Thereby, since the movement of the collective cylinder 22 can be regulated, high printing accuracy can be obtained.

  Therefore, according to the cylinder device according to the present invention, the collective plate cylinder 22 is supported by the double eccentric metal composed of the eccentric inner metal 42 and the eccentric outer metal 43, and the adjustment bolt 47 attached to the eccentric inner metal 42 is provided. By restricting the rotation of the collective plate cylinder 22 in the direction to be attached to the rubber cylinder 19 by contacting the stopper 49 provided on the machine frame 44, the gap between the collective plate cylinder 22 and the collective rubber cylinder 21 is controlled. The printing pressure between the collective plate cylinder 22 and the rubber cylinder 19 can be adjusted while maintaining the printing pressure. Thereby, a printing pressure adjustment mechanism can be made into a simple structure.

  Further, when the adjusting bolt 47 attached to the eccentric inner metal 42 and the stopper 49 provided on the machine frame 44 are brought into contact with each other, it is generated between the machine frame 44, the eccentric outer metal 43 and the eccentric inner metal 42. Since the play can be removed, high printing accuracy can be obtained.

  The cylinder device according to the present invention is not limited to the above-described embodiment, and within the scope not departing from the gist of the present invention, the number of cylinders of the transfer cylinder and the partial plate cylinder, the change of the cylinder arrangement, and the eccentric metal It goes without saying that various changes such as changes in the driving means are possible. Moreover, the cylinder device according to the present invention can be applied not only to the Zammel printing press but also to other printing presses.

  The cylinder device of the printing press according to the present invention can be effectively applied to securities printing and the like because it can perform printing pressure adjustment and the like with high accuracy in at least three cylinders with a simple configuration.

11 Zammel printing part 12 Double-sided offset printing part 18 Impression cylinder (fourth cylinder)
19 Rubber cylinder (third cylinder)
20 Partial plate cylinder 21 Collective rubber cylinder (first cylinder)
22 Collective cylinder (second cylinder)
23 Ink supply device 40 Eccentric metal (fourth eccentric bearing)
41 Driving device (fourth driving means)
42 Metal in eccentric (first eccentric bearing)
43 Eccentric outer metal (second eccentric bearing)
44 Machine frame (support member)
45 Hydraulic cylinder (first driving means)
46 Driving device (second driving means)
47 Adjustment bolt (contact part)
48 Eccentric metal (Third eccentric bearing)
49 Stopper (contact member)
51 Servo motor (third drive means)
F1 Rotation center of eccentric metal F2 Rotation center of non-eccentric metal R1 Rotation center of rubber cylinder R2 Rotation center of collective plate cylinder M Rotation center of metal in eccentric L1 Straight line connecting rotation center of rubber cylinder and rotation center of collective plate cylinder P1, P2 pressing part

Claims (6)

A second cylinder supported by a pair of support members so as to be able to approach and separate from the first cylinder and the third cylinder;
A pair of first eccentric bearings rotatably supporting both ends of the second cylinder and rotating the second cylinder close to and away from the first cylinder;
First driving means for rotating the pair of first eccentric bearings;
A pair of the first eccentric bearings are pivotally supported and rotated to bring the second barrel close to and away from the third barrel, and a pair of second bearings pivotally supported by the pair of support members. Eccentric bearings of
Second driving means for rotating the pair of second eccentric bearings;
A contact member provided on the pair of support members;
A contact portion provided in a pair of the first eccentric bearings, and abutting against the abutting member when the second cylinder comes into contact with the first cylinder by driving of the first driving means; A cylinder device for a printing press, comprising: The cylinder device of the printing press according to claim 1,
The cylinder device for a printing press, wherein the contact member is capable of adjusting a rotation amount of the first eccentric bearing when contacting the contact portion. The cylinder device for a printing press according to claim 1 or 2,
The rotation center of the first eccentric bearing and the rotation center of the second eccentric bearing are opposite to the contact points of the second cylinder and the third cylinder with respect to the rotation center of the second cylinder. Placed on the side
The rotation center of the second eccentric bearing is arranged on the opposite side of the contact point between the first cylinder and the second cylinder with respect to the rotation center of the first eccentric bearing. The cylinder device of the printing press. In the cylinder apparatus of the printing press in any one of Claims 1 thru | or 3,
In a state where the contact member and the contact portion are in contact,
The first eccentric bearing is constantly given a force in the direction in which the second cylinder is separated from the third cylinder, with the contact member as a rotation center, by the first driving means. And
The first eccentric bearing with respect to the second eccentric bearing and the second eccentric bearing with respect to the support member; and a rotation center of the third cylinder and a rotation center of the second cylinder. A cylinder device for a printing press, which is pressed in a direction substantially extending from a straight line connecting the two. In the cylinder apparatus of the printing press in any one of Claims 1 thru | or 4,
The cylinder body of a printing press, wherein the third cylinder is supported by the support member via a fourth eccentric bearing that is rotated by a fourth driving unit. The cylinder device of the printing press according to claim 5,
A fourth cylinder supported so as to be able to approach and separate from the third cylinder;
The third cylinder is rotated by the fourth driving means so that the third cylinder can be attached to and detached from the second cylinder, and can be attached to and detached from the fourth cylinder. A printing press cylinder device characterized in that the printing pressure of the printing press can be adjusted.

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