JPS6132985B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to continuous switching partial printing in which a wide variety of different patterns are successively printed on a part of a large amount of printed matter having most of the same pattern. It is related to the device.

[Conventional technology]

When printing a large amount of printed matter continuously using a rotary printing press, there are times when a wide variety of printed matter is required, with most of the designs being the same but some of them being different.
A typical example of this is flyer advertisements in department stores and supermarkets, which have been increasing in recent years. In other words, when a department store etc. has stores in various locations, all stores sell almost the same products, so the flyer is printed all at one place, and part of the printed surface has the store name for each region. printed. In this case, conventionally, after printing only the required number of copies for one store, the machine is stopped, and if the store name is red, for example, only the red version is replaced with the one with the next store name, and then the machine is printed again with the next store name. The task of printing was repeated.

[Problem to be solved by the invention]

However, with such conventional equipment, work efficiency decreases due to stopping the machine every time a partially printed pattern such as a store name changes, and a lot of paper is wasted due to the speed and deceleration of the machine when switching. This has the drawback of causing paper thinning, and especially now that machines have become faster and even paper splicing in the paper feed section has been automated to avoid stopping the machine, it has become a major obstacle to improving efficiency. was.

[Means for solving problems]

In order to solve these problems, in the present invention, a partial printing plate having a plurality of different pattern printing plates arranged in the circumferential direction is mounted on a plate cylinder, and the partial printing plate is attached to an ink forming roller that is in contact with the plate cylinder. An effective ink-applying surface with the same circumferential length as one of the printing plates is formed, and a drive transmission system that drives and connects this ink-forming roller to the driving side changes the rotational phase of the ink-forming roller. The drive transmission system for the plate cylinders is connected via a differential gear device.

[Effect]

With this configuration, when one of the printing plates with different patterns is brought into contact with the ink forming roller and printing work is started, the paper on which most of the common patterns are printed will be separated from the other cylinder and its opposing cylinder. When passing through the space, the pattern of the partial printing plate is transferred and printed. After printing a predetermined number of copies, when the control shaft of the differential gear device is driven by another drive means during operation, the circumferential phase of the plate cylinder and the mating cylinder changes with respect to the ink forming roller, causing partial printing. The next pattern on the printing plate corresponds to the ink forming roller, and the next different pattern is printed on the paper.

〔Example〕

This embodiment shows an example in which the present invention is applied to a double-sided multicolor offset rotary printing machine for printing store names on leaflets. Figure 1 is a schematic side view of the printing machine in which this is implemented, and Figure 2 is a continuous switching partial printing device. FIG. 3 is an exploded view of the drive section, FIG. 4 is an expanded view of a partial printing plate, and FIG. 5 is a detailed sectional view of the differential gear mechanism. In these figures, a printing press 1 includes a paper feeder 3 that supplies a printing web 2;
Four sets of printing units 4 that print four colors of black, red, blue, and yellow on both sides of the supplied web 2, a dryer 5 and a cooling device 6 that dry and cool the printed web, and a discharge unit after cooling. The apparatus is equipped with a folding machine 7 that cuts and origates the printed matter to a predetermined size. and,
Between the fourth color printing unit 4 and the dryer 5,
A continuous switching partial printing device (hereinafter simply referred to as printing device) 8 according to the present invention is provided, and this printing device 8 and each of the devices 3, 4, 5, 6, 7 are connected to a motor by a driving line shaft 9. The drive is connected to the

Of these, the printing device 8 is constructed as schematically shown in FIG. 2, with the arrangement of its printing cylinder, rollers, etc. That is, the printing device 8 is
It is equipped with an upper printing device and a lower printing device that are arranged above and below with the web 2 in between, and although these have different arrangement directions of rollers, etc., they have almost the same configuration, so they are compatible with each other. The same reference numerals are given and the outline of the upper printing device will be explained. Above the blanket cylinder 10, which serves as a mating cylinder that clamps the web 2 together with the lower blanket cylinder 10, a plate cylinder 11 having approximately the same diameter as the blanket cylinder 10 is disposed with their circumferential surfaces facing each other.
On the other hand, an ink fountain 12 for storing printing ink is provided at the upper end of the device. Between the ink fountain roller 13 rotating in the ink fountain 12 and the swing roller 14 disposed downstream thereof, there is a transfer roller 16 that reciprocates between the rollers 13 and 14 by the swing of the swing arm 15. is provided, and furthermore,
A plurality of kneading rollers 17 and 18 and an ink forming roller 19 are arranged between the swinging roller 14 and the plate cylinder 11. On the other hand, on the upstream side of the plate cylinder 11, there is a water base roller 20 that rotates in a water tank, a swing roller 21, a transfer roller 22 that reciprocates between these rollers 20 and 21, and a transfer roller 22 and a plate cylinder. A water supply device consisting of a swimsuit roller 23 whose peripheral surface is in contact with the roller 11 is provided.

In the printing device 8 having the general structure described above, the ink stored in the ink fountain 12 is rotated by the ink fountain roller 13 to form an ink film on the surface of the ink fountain roller 13. It is transferred to the swinging roller 14 by the roller 16. After the ink is leveled in the axial direction and circumferential direction by the swing roller 14 and the kneading rollers 17 and 18, it is supplied to the plate surface of the plate cylinder 11 by the ink forming roller 19. On the other hand, water in the water tank is circulated by a water source roller 20, transferred to a swinging roller 21 by a reciprocating transfer roller 22, and further supplied to the plate surface on the plate cylinder 11 by a water roller 23. . By supplying ink and water in this way, an image is formed on the printing plate, and this image is transferred to the blanket cylinder 10 and then transferred to the web 2 after four-color printing to perform printing. .

The configurations of the ink forming roller 19, plate cylinder 11, and blanket cylinder 10 of the printing device 8 configured as described above and the configuration of their drive device will be explained in detail below with reference to FIGS. 3 and 4. do. That is, it is perpendicular to the driving line shaft 9 and the bevel gears 24, 2
A drive shaft 26, which is drive-coupled by 5, has both ends pivotally supported by a frame 27 and a side frame 28 of the machine, and includes two drive gears 29.
and 30 are pivoted. The drive gear 29 is
The upper printing device shown in the upper half of FIG. 3 is driven, and the drive gear 30 drives the lower printing device shown in the lower half of FIG. Since the configuration is the same even if the arrangement direction is different, the same reference numerals are given to the corresponding parts, and the configuration of the upper printing device will be explained.
That is, both frames 2 are parallel to the drive shaft 26.
A harmonic drive type differential gear device (hereinafter referred to as a differential mechanism) 32, which will be described later, is mounted on a control shaft 31 which is supported by shafts 7 and 28, and has a driving side and a driven side. An ink forming roller drive gear 33 and a blanket cylinder drive gear 34 are each integrally fixed to the ink forming roller drive gear 33 and blanket cylinder drive gear 34, respectively. A blanket cylinder gear 35 is rotatably attached to the shaft end of the blanket cylinder 10 which is pivotally supported by the frame 27, and this blanket cylinder gear 35 meshes with the blanket cylinder drive gear 34, and also engages with the blanket cylinder drive gear 34. 11
It also meshes with a plate cylinder gear 36 which is pivotally attached to the shaft end of the plate cylinder. Note that since the upper and lower printing devices rotate in opposite directions, an intermediate gear 37 is interposed between the blanket cylinder drive gear 34 and the blanket cylinder gear 35 of the lower printing device.

A partial printing plate 38, which is shown developed in FIG. 4, is attached to the circumferential surface of the plate cylinder 11. This version 38
The store name pattern, which is the pattern on the plate, is positioned in the axial direction of the plate cylinder 11 to match the position where the store name is printed in the pattern of the printed matter, and in the circumferential direction of the plate cylinder 11. On the other hand, different types are provided in parallel at positions where the entire circumference is divided into a plurality of parts (divided into four in this embodiment) in the circumferential direction.

On the other hand, the ink forming roller drive gear 33 on the drive side of the differential mechanism 32 meshes with a forming roller gear 40 that is rotatably attached to the end shaft end of the ink forming roller 19 via a gear mounting plate 39. . In addition, in FIG. 3, both gears 33,
The chain lines indicate that 40 are in mesh with each other. Further, the lower printing device is provided with an intermediate gear 41 that reverses the rotational direction in the same manner as described above. The roller gear 40 is provided with four elongated holes 41, as shown in a front view in a portion of FIG.
By positioning the ink forming roller gear 40 and the ink forming roller 19, the phase of the forming roller gear 40 and the ink forming roller 19 can be freely adjusted within a range of 360 degrees. Furthermore, the ink application roller 19 includes an axial core part 19a, an ink application part 19b that is removably fitted and fixed to the shaft core part 19a, and an ink application part 19b that is attached to an end of the shaft core part 19a concentrically therewith. It is integrally formed with the end shaft 19c. As shown in FIG. 2, the ink-applying portion 19b consists of an effective ink-applying surface 19d consisting of a large-diameter portion having approximately the same diameter as that of the plate cylinder 11, and a small-diameter portion 19e having a smaller diameter than the effective ink-applying surface 19d, as shown in FIG. The circumferential length of the effective ink-applying surface 19d is approximately the same length as the circumferential length of one plate surface of the plate 38, that is, in this embodiment, it is formed in the shape of an arc with a circumferential angle of approximately 90 degrees. Therefore, the ink on the kneading roller 18 is intermittently transferred to the effective ink application surface 19d, and further intermittently applied to any one of the printing plates 38.

In this embodiment, the number of teeth of each gear is set as follows.

Drive gear 30...50T Arrival roller drive gear 33...46T Arrival roller gear 40...50T Blanket cylinder drive gear 34...64T Blanket cylinder gear 35...70T Plate cylinder gear 36...70T Intermediate gear 37...64T Intermediate gear 41...46T Therefore, the drive side of the differential mechanism 32 and the ink forming roller 19 have the same rotation speed, and the blanket cylinder 10
and the plate cylinder 11 have the same rotation speed. Furthermore, the bevel gears 24 and 25 have the same number of teeth, and therefore the driving line shaft 9 and the drive shaft 26 have the same rotation speed.

Therefore, the structure of the differential mechanism 32 will be explained.
This mechanism is a conventionally well-known one commercially available as a harmonic drive type, and in this embodiment, a motor 43 is directly connected to a control shaft 31 on which this mechanism is mounted. The control shaft 31 is provided with a web generator 44 having an elliptical outer circumference.
A thin, elastic cylindrical flexspline 45 is fitted onto the elliptical outer periphery of the flexspline 45 via a ball bearing 46. Teeth are cut. Further, a case 48 is fitted on the drive gear 29 side, that is, the drive side of the differential shaft 31 with respect to the flex spline 45, through a ball bearing 47, and the formation roller drive gear 33 is integrated with this case 48. It is attached to the shaft. Furthermore, the flex spline 45 of the control shaft 31
A case 50 is fitted through a ball bearing 49 on the driven side of the case 5.
0, the rubber cylinder drive gear 34 is integrally attached to the shaft. A circular spline 51 and a circular spline 52 are respectively attached to opposing end surfaces of both cases 48 and 50 by bolts 53, and a flex spline is attached to the inner circumferential surface of the circular spline 51 and circular spline 52, respectively. Each tooth has the same pitch as 45. The number of teeth on the driving side circular spline 51 is set to 161T, which is 1T more than the flexspline 45, and the driven side circular spline 52 is set to 160T, which is the same number as the flexspline 45. There is. By doing this, the flex spline 45
is forcibly deformed into an elliptical shape by the web generator 44 and engaged with the circular splines 51 and 52 at the long axis of the ellipse, and the control shaft 31 is fixed by braking the motor 43. When the driving side forming roller driving gear 33 is rotated, the speed of the driven side blanket cylinder driving gear 34 is changed to 161/160 rotations for one rotation of the forming roller driving gear 33, and the rotation is transmitted to the blanket cylinder 10. Furthermore, when the motor 43 is rotated during drive operation in such a state, the flexspline 45 rotates via the web generator 44, thereby causing the rubber cylinder on the driven side to Drive gear 34
The phase of the blanket cylinder 10 and the plate cylinder 11 on the driven side can be changed without changing the phase of the forming roller 19 which is drivingly connected to the driving side.

In the printing press 1 constructed as described above, plates of the required number of colors are mounted on the printing cylinder of the printing unit 4, and a printing plate 38 for printing a shop name is mounted on the printing cylinder 11 of the partial printing device 8. And before printing,
Loosen the bolt 42 at the end of the shaft of the ink form roller 19 to rotate the ink form roller 19 and rotate its large diameter portion 19d.
Correctly corresponds to one store name so that it does not overlap two store names in version 36. After doing this, when printing is started with the motor 43 braked and the control shaft 31 fixed, the upper and lower blanket cylinders 1 When passing through the gap, the first store name transferred from the printing plate to the circumferential surface of the blanket cylinder 10 is printed. Ink forming roller 1 during this printing
9 and the rotation speed of the plate cylinder 11 are the rotation speed of the drive shaft 26.
In the case of Nr, p, and m, the following formula is derived from the number of teeth of each gear and the gear ratio of 161/160 of the differential mechanism.

Ink forming roller rotation speed = N x 50/46 x 46/5
0 = N Number of rotations of plate cylinder = N x 50/46 x 161/160 x 6
4/70×70/70=N That is, since not only the blanket cylinder 11 and the plate cylinder 10 but also the ink forming roller 19 and the plate cylinder 10 rotate at the same speed, the phase does not change during printing.

After printing a predetermined number of leaflets for the first store name in this way, the motor 43 is turned on while the machine is running.
When the motor 43 is rotated, the control shaft 31
For each rotation of the differential mechanism, the phase of the driven side of the differential mechanism changes by 360°/160 in angle. Also, rubber cylinder 1
0 and the plate cylinder 11 are meshed with gears 34 and 35, so the phase changes by 360°/160×64/70. Therefore, in order to change the phase of the blanket cylinder 10 and plate cylinder 11 by 90 degrees and switch to the second store name, the motor 43 should be rotated 90 degrees ÷ 360 degrees/160 x 64/70≒44 rotations. .

In this case, since the ink forming roller 19 is directly connected to the drive shaft 26 through the gears 29, 33, and 40, the phase does not change, and due to the phase change of the plate cylinder 11, the effective ink forming surface 19d of the ink forming roller 19 changes from that of the plate 36. Correctly correspond to the second store name.

In this way, the store name is switched while the machine is operating, and ink is applied to the second store name on the plate 36 by the ink forming roller 19, and this image is transferred to the blanket cylinder 10 to form a predetermined position on the printed matter. Printed to position. After printing a predetermined number of flyers for the second store name, by sequentially changing the store name and continuing printing, in this embodiment, the machine can stop printing four types of flyers with the same design but different store names. It is possible to print continuously without any problems. Further, since the store name is changed while the non-printing portion of the blanket cylinder 10 is in contact with the web 2, there is less paper waste. Then, it is time to change the store name, that is, motor 4.
3, the rotation start timing and the number of rotations of the motor 43 are as follows.
Automatic control can be achieved by providing a control device.

Note that the present invention uses a differential gear mechanism, which is generally used as a transmission, as a device for changing the phase between the driving side and the driven side. Although a harmonic drive type mechanism is illustrated as an example, any mechanism that can change the phase between the driving side and the driven side during power transmission, such as a mechanism using planetary gears, may be used. The number and the like are not limited to those shown in this example.

In addition, in this embodiment, the plate 36 is divided into four pieces.
Although it is possible to print a type of printed material, if the length of the partial printing section is short, the plate 36 is divided into smaller parts, and the ink application section 19b is provided with an effective ink application surface 19d corresponding to the number of divisions. By preparing and replacing the holder 19a with respect to the axial center portion 19a, it is possible to continuously print a wider variety of printed matter.
Further, the printed material is not limited to flyers, and the partial printed portion may be other than the store name. Furthermore, the invention can also be implemented for single-sided printing, in which case the lower blanket cylinder 10 can be used without a lower printing device.
Instead, an impression cylinder of any diameter may be provided. Also,
Since this embodiment is an offset printing press, the plate cylinder 1
Although the blanket cylinder 10 is illustrated as one mating cylinder, if the partial printing apparatus is, for example, a letterpress printing machine or an intaglio printing press, the mating cylinder becomes an impression cylinder instead of the blanket cylinder. In this case, the switching may be performed by changing the phase of only the plate cylinder.

〔Effect of the invention〕

As explained above, according to the present invention, a partial printing plate having a plurality of different picture plates arranged in the circumferential direction is mounted on a plate cylinder, and the partial printing plate is attached to an ink forming roller that is in contact with the plate cylinder. The drive transmission system that forms an effective ink deposition surface with the same circumferential length as one of the printing plates, and drives and connects this ink deposition roller to the driving side, includes a differential that changes the rotational phase of the ink deposition roller. Since the drive transmission system of the plate cylinders is connected via a gear device, even during operation, by rotating the control shaft of the differential gear device, one of the partial printing plates can be selectively activated by the inking roller. It can be made to correspond to the ink-applied surface. Therefore, it is possible to print a wide variety of printed matter that have most of the same pattern but only one part that is different without stopping the printing machine, which significantly improves work efficiency and reduces the time when starting and stopping the machine. It is possible to eliminate the occurrence of paper waste due to acceleration/deceleration, etc., and this effect is particularly noticeable in high-speed machines.

[Brief explanation of the drawing]

1 to 4 show an embodiment of a continuous switching section printing device according to the present invention, FIG. 1 is a schematic side view of a double-sided multicolor printing offset rotary printing press in which this is implemented, and FIG. 2 is a continuous switching section FIG. 3 is an exploded view of the drive unit, FIG. 4 is an expanded view of a partial printing plate, and FIG. 5 is a detailed sectional view of the differential gear mechanism. 9... Driving line shaft, 10... Rubber cylinder, 11... Plate cylinder, 19... Ink deposition roller, 19d... Effective ink deposition surface, 24, 25... Bevel gear, 30... Drive shaft,
31... Control shaft, 32... Differential gear mechanism, 33... Forming roller drive gear, 34... Bum cylinder driving gear, 35... Bum cylinder gear, 36... Plate cylinder gear, 38... Plate, 40... Forming roller gear, 43... Motor .

Claims (1)

[Claims] 1. A partial printing plate 38 having a plurality of different picture plates arranged in the circumferential direction and mounted on the plate cylinder 11, and an arc-shaped plate having the same circumference as one different picture plate among the partial printing plates 38. Effective ink landing surface 19 consisting of the peripheral surface
d and an ink forming roller 19 that is in contact with the plate surface of the partial printing plate 38 of the plate cylinder 11, and the ink forming roller 19 is connected to a drive transmission system that drives and connects the ink forming roller 19 to the driving side. A continuous switching partial printing device characterized in that the drive transmission system of the plate cylinder 11 is connected via a differential gear device 32 that changes the phase in the rotational direction.