JPS61149358A - Rotary printer - Google Patents

Abstract

PURPOSE:To perform multi-color printing of plural pieces of printing paper wound in parallel by moving individually plural divided timing rollers eccentrically to each other. CONSTITUTION:If the feed conditions of printing paper P is quite the same as those of printing paper Pa, printing paper Pb is adjusted for printing shift simultaneously with the adjustment of printing paper Pa by operating an adjusting screw 26. However, if such an adjustment of the paper Pb cannot be performed at the same time as for the paper Pa due to different feed conditions, a fine adjustment handle 32 is operated to allow a worm 33 and a worm wheel 31 to rotate. That is, an eccentric collar 28 is caused to rotate with a support shaft 27 by rotating the worm wheel 31 and the center of a rotation shaft of a timing roller 23b supported in rotatable fashion at the external circumference of an eccentric collar 28 is allowed to eccentrically move with the center of a rotation shaft of a timing roller 23a. Thus the printing positions of two printing paper Pa and Pb supplied in parallel simultaneously are adjusted respectively. In turn, high-quality multi-color printing is performed on printing paper Pa, Pb.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a rotary printing press, and more particularly to a rotary printing press provided with a timing roller for adjusting printing misalignment.

[Technical background of the invention and its problems]

When performing multicolor printing using a rotary printing press, the number of plate cylinders corresponding to the type of color is usually arranged, and printing misalignment is adjusted between the plate cylinders for the second and subsequent colors. A timing roller is provided for this purpose.

FIG. 6 is a partial perspective view showing an example of a rotary printing press used for such multicolor printing. In the figure, reference numeral 11 is a plate cylinder, and 12 is an impression cylinder, and printing paper P is continuously supplied between the plate cylinder 11 and the impression cylinder 12.

The upstream side (paper feeding side) of the printing paper P is wound around a timing roller 13 for adjusting printing misalignment, and is further wound around a fixed roller 14 arranged parallel to and adjacent to this timing roller 13. Tension is applied to P.

The timing roller 13 and the fixed roller 14 are rotatably supported at both ends by an adjustment arm 15, and the adjustment arm 15 can be adjusted and moved in the axial direction of the adjustment screw 16 by an adjustment screw 16.

In a conventional rotary printing press having such a configuration, when printing misalignment occurs in the second and subsequent colors, the adjustment screw 16 is operated to move the position of the timing roller 15 and the printing position is adjusted. I was going.

However, in a follower rotary printing press, since the timing roller 13 is a single component, the winding of printing paper that can be adjusted is always limited to a single row of printing paper. Therefore, when printing on printing paper with a narrow printing width, there are many unused portions on both sides of the timing roller 13, resulting in poor printing efficiency and the drawback that the capabilities of the printing machine cannot be fully utilized. On the other hand, if a plurality of printing papers are wound in double rows around a single timing roller 13, although it is possible to improve printing efficiency, it is necessary to adjust the printing position of each printing paper. Therefore, it is difficult to perform good multicolor printing. In particular, if the printing paper is a material that easily expands and contracts, such as cellophane or vinyl, it is difficult to perform multicolor printing using a single timing roller 13.

[Purpose of the invention]

The present invention has been made in consideration of these points,
An object of the present invention is to provide a rotary printing press capable of performing multicolor printing by winding a plurality of printing papers in parallel.

Another object of the present invention is to provide a rotary printing press that can perform multicolor printing by winding a plurality of narrow printing papers in parallel, and can also perform multicolor printing on wide printing paper. do.

[Summary of the invention]

The present invention is a rotary printing press in which a timing roller for adjusting printing misalignment is disposed between a first plate cylinder and a second plate cylinder, and the timing roller is divided into a plurality of parts in the axial direction. At least one of the divided timing rollers
The at least one timing roller is characterized in that the axis of its rotating shaft is eccentrically movable.

Further, the present invention provides a rotary printing press in which a timing roller for adjusting printing misalignment is disposed between a first plate cylinder and a second plate cylinder, and the timing roller includes a plurality of timing rollers in the axial direction. At least one timing roller among the divided timing rollers is capable of eccentrically moving the axis of its rotating shaft, and its ends can be connected to the ends of adjacent timing rollers. It is characterized by what is said to be.

According to the present invention, each of the divided timing rollers can be individually moved relatively eccentrically, and the printing position of each printing paper wrapped around each timing roller can be individually adjusted. Thereby, it is possible to perform multicolor printing by wrapping a plurality of printing papers in parallel.

Further, according to the present invention, an integrated wide timing roller can be obtained by interconnecting the ends of the timing roller divided into a plurality of pieces. Thereby, it is possible to perform parallel printing of a plurality of narrow printing papers and printing of a wide printing paper by using the same printing machine.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial perspective view showing a first embodiment of a rotary printing press according to the present invention. In the figure, numeral 11 is and 1
Reference numerals 2 denote a plate cylinder and an impression cylinder, respectively, between which printing paper is supplied and printing is performed.

A timing roller 23 for finely adjusting the printing position is provided upstream of the plate cylinder 11 (on the printing paper supply side). This timing roller 23 is the first timing roller on the upstream side.
The printing cylinder 11 is disposed between a printing cylinder (not shown) and a second printing cylinder 11 on the downstream side, and is arranged between a plurality of printing cylinders arranged according to the type of color. The timing roller 23 is divided into a plurality of parts (two in this embodiment) in the axial direction, and one of the divided timing rollers, the timing roller 23a, is supported coaxially with the support shaft 27 so as to be able to rotate once. ing. Further, the other timing roller 23b is supported so that the axis of its rotating shaft can be eccentrically moved in the radial direction.

That is, as shown in FIGS. 2 and 3, an eccentric collar 28 whose axes of an outer circumferential circle and an inner circumferential circle are eccentric is disposed between the timing roller 23b and the support shaft 27. A timing roller 23b is rotatably supported around the outer periphery of the timing roller 28 via a bearing 29. The eccentric collar 28 is loosely fitted onto the support shaft 27, and a fine adjustment mechanism 30 is connected to the end thereof for rotationally driving the eccentric collar 28 and finely adjusting the position of the timing roller 23b.

The fine adjustment mechanism 30 is composed of a combination of a worm and a worm wheel, and a worm wheel 31 for rotationally driving the eccentric collar 28 is fixed to an end of the eccentric collar 28. A worm 33 is meshed with the worm wheel 31 and has a fine adjustment handle 32 (see FIG. 1) at its end.

Both ends of the support shaft 27 are fixed to one end of the pair of adjustment arms 25 . A support shaft 24a of a fixed roller 24 for applying tension to the printing paper wound around the timing roller 23 is fixed to the other end of the adjustment arm 25. Further, a nut member 25a is fixed to the adjustment arm 25, and an adjustment screw 26 is screwed into the nut member 25a.

Next, the operation of this embodiment having such a configuration will be explained.

As shown in FIG. 1, the printing paper is simultaneously supplied in two rows so as to be wound around the respective timing rollers 23a and 23b. The printing paper Pa wound around the timing roller 23a is printed by passing between the plate cylinder 11 and the impression cylinder 12.

In this case, if there is a printing misalignment in the second or subsequent colors, the timing roller 23a can be adjusted by operating the adjustment screw 26 and moving the adjustment arm 25 in the axial direction of the adjustment screw 26.
in the same direction to adjust the printing position.

On the other hand, the printing paper pb wound around the timing roller 23b is similarly printed by passing between the plate cylinder 11 and the impression cylinder 12. If the feeding conditions of the printing paper pb are exactly the same as those of the printing paper Pa, by operating the adjustment screw 26, the printing deviation can be adjusted for the printing paper pb at the same time. If the paper feeding conditions are different and it is not possible to adjust the printing paper Pa at the same time, fine adjustment of printing misalignment must be performed separately for the printing paper pb. This fine adjustment is performed by operating the fine adjustment handle portion 32 to rotate the worm 33 and the worm wheel 31. That is, by rotating the worm wheel 31, the eccentric collar 28 is rotated with respect to the support shaft 27, and the rotation axis of the timing roller 23b rotatably supported around the outer periphery of the eccentric collar 28 is rotated. The axial center of the timing roller 23a is eccentrically moved relative to the axial center of the rotating shaft of the timing roller 23a. As a result, as shown in FIG. 2, the paper feeding paths of the printing papers pa and Pb are made different, and the difference in printing timing between the printing papers Pa and pb is adjusted.

In this way, according to this embodiment, it is possible to adjust the printing positions of the two printing papers pa and pb that are supplied in parallel at the same time, so that the printing positions of the two printing papers pa and pb can be adjusted.
, Pb, good multicolor printing can be performed.

FIG. 4 is a partial sectional view showing another embodiment of the present invention.

In this embodiment, eccentric collars 38a and 38b are disposed between each of the timing rollers 34a and 34b, which are divided into a plurality of parts, and the support shaft 37. One eccentric collar 38a is supported with a constant eccentric direction by a key groove provided inside the inner circumference engaging a key 41 attached to the support shaft 37.
8bG, like the eccentric collar in the embodiment described above, can be rotated about the support shaft 37 by, for example, rotating a worm wheel (not shown) fixed to the end.

Further, one eccentric collar 388 is slidable in the axial direction using the key 41 as a guide.

Reference numeral 42 denotes a stopper ball for stopping axial movement, and this ball 42 is biased radially inward by a spring 43 provided within the eccentric collar 38a. Further, two parts are placed on the outer circumference of the support shaft 37 at a predetermined distance.
two engagement grooves 44a.

44b is formed and the ball 42 is engaged with the engagement groove 44a, the timing roller 34a is separated from the timing roller 34b as shown in FIG. 4, and one of the timing rollers 34a is When the ball 42 is slid in the direction of the other timing roller 34b and engages with the engagement groove 44b, the end of the timing roller 34a is brought into contact with the end of the timing roller 34b. .

Couplings are attached to opposing ends of the eccentric collars 38a, 38b to couple them together. As this coupling, for example, as shown in FIG.
An I-shaped construction consisting of a combination of a recessed portion 46 and a concave portion 46 can be adopted. That is, a protrusion 45 is formed at the end of the eccentric collar 38a, and a recess 46 that engages with the protrusion 45 is formed at the end of the eccentric collar 38b.

In this embodiment, when a narrow printing paper is wound around the timing rollers 34a and 34b for multi-color printing, the timing roller 34b is rotated by rotating the eccentric collar 38b as in the embodiment described above. By eccentrically moving the axes of the rotation axes of the two, it is possible to fine-tune printing misalignment independently.

In addition, when printing on wide printing paper, the eccentric collar 388 can be moved automatically or manually to the eccentric collar 38b.
direction, the convex portion 45 of the eccentric collar 38a is inserted into and engaged with the concave portion 46 of the eccentric collar 38b, and the two are integrally connected. As a result, the timing rollers 34a, 34b
The opposite ends of the timing roller are abutted and the overall width dimension of the timing roller is doubled. By wrapping the printing paper around the timing roller whose overall width has been increased in this way, it is possible to print on a wide printing paper. In this case, to adjust the printing misalignment, use an adjustment screw (not shown).
This can be done by operating the adjustment arm 25 and moving the adjustment arm 25.

In the description of this embodiment, an example is shown in which the timing roller is divided into two parts, but the same applies even when the timing roller is divided into three or more parts. In addition, we have shown an example in which an eccentric collar is used as a means for eccentrically moving the axis of the rotation shaft of the timing roller, but other methods include eccentric movement using a cam mechanism, eccentric movement by inserting and replacing an eccentric sleeve, and It is possible to employ means such as eccentric movement by expanding a part of the outer circumferential surface of. Furthermore, as a rotation mechanism for the eccentric collar, in addition to the worm and A-me wheel, we have also adopted a normal gear structure, a mechanism for manually rotating the dial provided at the end of the eccentric collar, a motor drive mechanism, etc. Can be adopted. Further, in the first embodiment, the eccentric collar 28 is interposed only inside one of the timing rollers 23b, but an eccentric collar may be interposed for each of all the timing rollers 23a and 23b. Furthermore, although a concave-convex engagement IN structure is employed as a coupling for joining the ends of the respective timing rollers 34a and 34b, a car pick coupling, a hydraulic clutch, a magnetic clutch, or the like may also be used.

〔Effect of the invention〕

As described above, according to the present invention, printing paper can be wound in multiple rows on one rotary printing machine and multicolor printing can be performed simultaneously. Moreover, both wide and narrow printing paper can be printed well, and the operating efficiency of the printing press can be improved.

The rotary printing press according to the present invention is particularly suitable for multicolor printing on stretchable printing paper that is prone to misalignment of printing positions, such as cellophane and vinyl, and can improve printing accuracy and efficiency. By performing targeted operation, it is possible to improve printing productivity.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view showing a first embodiment of a rotary printing press according to the present invention, and FIG. 2 is a sectional view taken along the line ■-■ in FIG.
FIG. 3 is a partial sectional view showing a timing roller fine adjustment mechanism according to the present invention; FIG.
The figure is a partial sectional view showing a second embodiment of the present invention, FIG. 5 is a partial perspective view showing an example of the coupling mechanism used in the embodiment shown in FIG. 4, and FIG. FIG. 1 is a partial perspective view showing an example of a rotary printing press. 11... Plate cylinder, 23.23a, 23b, 34a. 34b...Timing roller, 25...Adjustment arm, 26...Adjustment screw, 27.37...Support shaft, 28
゜38a, 38b... Eccentric collar, 30... Fine adjustment mechanism, 31... Worm wheel, 33... Worm, 45... Convex part, 46... Concave part, Pa, Pb...
・Printing paper.

Claims (1)

[Claims] 1. In a rotary printing press in which a timing roller for adjusting printing misalignment is disposed between a first plate cylinder and a second plate cylinder, the timing roller is arranged in an axial direction. At least one of the divided timing rollers is divided into a plurality of parts.
A rotary printing press characterized in that the axis of rotation of the at least one timing roller can be eccentrically moved. 2. Claim 1, characterized in that an eccentric collar is disposed between the divided timing roller and the timing roller support shaft, and the eccentric collar is rotatable with respect to the support shaft. The rotary printing press described in Section 1. 3. The rotary type according to claim 2, characterized in that a worm wheel is fixed to the end of the eccentric collar, and a worm having a fine adjustment handle portion is engaged with the worm wheel. Printer. 4. In a rotary printing press in which a timing roller for adjusting printing misalignment is disposed between a first plate cylinder and a second plate cylinder, the timing roller is divided into a plurality of parts in the axial direction; At least one timing roller among the timing rollers is capable of eccentrically moving the axis of its rotating shaft, and the end thereof is connectable to the end of an adjacent timing roller. Characteristic rotary printing press. 5. An eccentric collar is disposed between the divided timing roller and the timing roller support shaft, and this eccentric collar is rotatable and its ends can be connected to the ends of adjacent eccentric collars. A rotary printing press according to claim 4, characterized in that: 6. A convex portion is formed at the end of one eccentric collar, and a concave portion that engages with the convex portion is formed at the end of the other eccentric collar, and the two eccentric collars are arranged in the axial direction. 6. The rotary printing press according to claim 5, wherein the rotary printing press is relatively movable.