JPH0213156Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting the phase of a printing cylinder by rotating a plate cylinder in order to align the position of a pattern with respect to printing paper in a rotary printing press.

A sheet-fed rotary printing press is equipped with a plate cylinder on which a printing plate is mounted, a blanket cylinder that is in contact with this plate cylinder, and an impression cylinder that is in contact with this blanket cylinder. The image is transferred to the blanket cylinder, and then transferred to paper that passes between the blanket cylinder and the impression cylinder, where printing is performed. In this case, the paper held in its claws is always wound around the impression cylinder at the same position, and the relative phase of the impression cylinder and rubber cylinder in the circumferential direction does not change, so the image on the paper The position of is determined by the positional relationship of the plate cylinder with respect to the blanket cylinder.

On the other hand, the printing plate is manufactured to be larger than the size of the picture by the margin provided around the four circumferences, and the size of this margin and the ratio of the front margin to the rear margin differ depending on the model of the printing press. Therefore, a plate is manufactured after determining the margin dimensions according to the model, but if the plate is made with the wrong model during the plate-making process, or if the model is changed after plate-making, the result of installing the plate In some cases, the position of the image relative to the paper may shift significantly, creating a large margin or causing the printed image to protrude from the paper. In such a case, the adjustment range of the register adjustment device normally provided on every plate cylinder is at most 2 to 2.
Since it is only about 3 mm, it cannot be adjusted within the range of this device.

For this reason, various configurations have been proposed in the past in which the phase can be changed by separating the plate cylinder from the driving side and adjusting its rotation.For example, Jikkosho's
No. 53-13443 and the like disclose a structure in which the rotational adjustment operation of the plate cylinder described above is performed using a dedicated rough adjustment tool. To explain this simply, in this conventional example, the ink drive gear is bolted to a gear receiver fixed to the end shaft of the plate cylinder rotatably supported on the frame side, and the plate cylinder drive on the driving side is The gears are connected in a rotatable manner by bolts inserted through elongated holes, and by loosening the bolts that fix the plate cylinder drive gear, the plate cylinder can be separated from the driving side and lengthened. The rotation can be adjusted by the hole. Then, using a rough adjustment tool provided at the tip of the rod and in the middle thereof, a nut portion for loosening the bolt for fixing the plate cylinder drive gear and a pinion portion that meshes with the ink drive gear are attached to the nut portion at the tip of the rod. At the same time as separating the plate cylinder drive gear, the pinion part is engaged with the ink drive gear with the nut part fitted into the hole provided in the frame side and the ink drive gear is rotated to adjust the rotation of the ink drive gear. The configuration was such that the phase was adjusted by rotating the plate cylinder using a gear.

However, in such a conventional configuration, when separating the plate cylinder from the driving side and adjusting the rotation,
It is necessary to prepare a special tool for coarse adjustment, which has a nut part at the tip of the rod and a pinion part in the middle of the rod, as a special tool just for coarsely adjusting the phase of the plate cylinder. The machine has a large number of component parts, requires a place to store them when not in use, and has problems such as the inability to adjust the phase of the plate cylinder without such special tools. It was hot. In particular, there are relatively few opportunities to perform such plate cylinder phase adjustment, and preparing a special tool for something that is used infrequently is problematic from a practical standpoint, including high costs. It was hot.

Furthermore, with such a rough adjustment tool, the pinion part is engaged with the ink drive gear while the nut part at the tip of the rod is engaged with the hole on the frame side, and the tool is rotated while maintaining the engaged state. This requires troublesome and unstable adjustment work, and if the pinion meshes with the ink drive gear side, the ink drive gear may be damaged. There was also the risk of causing problems. In addition, in order to use a tool with such a pinion part, it is necessary to secure a certain amount of space for its operation, especially on the side frame of the printing press where a large number of gear trains etc. are arranged. Securing this leads to an increase in the size of the printing press as a whole, and it is desired that some kind of measure be taken to eliminate these problems.

This invention was devised in view of the above points, and includes an ink drive gear fixed to the end shaft side of the plate cylinder.
An intermediate for plate cylinder phase adjustment having a spanner hook on the outer surface of the gear train that fixes the plate cylinder gear drivingly connected to the driving side so as to be able to adjust the phase, and drivingly connects the ink drive gear and the inking device roller. By providing a gear, it is possible to adjust the phase of the plate cylinder over a wide range with the simple operation of releasing the fixation between the ink drive gear and the plate cylinder gear and rotating the intermediate gear, as well as making use of a rotation transmission device. The present invention provides a plate cylinder phase adjustment device for a rotary printing press that has a simplified structure and a reduced number of parts. Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 show an embodiment of the plate cylinder phase adjustment device according to the present invention, and FIG. 1 is a sectional view thereof;
FIG. 2 is also a side view. In the figure, a plate cylinder 3 with a plate 2 mounted on the circumferential surface is rotatably supported on the left and right frames 1 of the printing press via a bearing 4, and a screwed nut of the threaded portion of the plate cylinder 3 is rotatably supported on the left and right frames 1 of the printing press. 5 restricts movement in the axial direction. A bottomed cylindrical gear center 7 having a flange 7a is fitted into the end shaft 6 of the plate cylinder 3, and is fixed with a bolt 8.
An ink drive gear 9 is fitted onto the outer peripheral surface of the gear center 7 than the collar 7a, and is fixed to the collar 7a with bolts 10. 11 is gear center 7
It is a plate cylinder gear loosely mounted on the inner circumferential surface of the collar 7a, which meshes with a blanket cylinder gear 12 pivotally attached to the end shaft of a blanket cylinder (not shown), and is drivingly connected to the driving side. . In this plate cylinder gear 12, a plurality of phase adjustment bolts 13 are inserted from the outside of the gear center 7 into the flange 7a.
By making the penetrating portion of the collar 7a into a long hole 14, the phase between the ink drive gear 9 and the plate cylinder gear 11, that is, the phase between the plate cylinder 3 and the blanket cylinder can be changed. In addition, phase adjustment bolt 1
3, both gears 9 and 11 are fixed at the position where the phase has been changed.

On the other hand, above the plate cylinder 3, an inking device (not shown) that includes a large number of roller groups and supplies ink to the plate 2 on the plate cylinder 3 is disposed, and the rollers of this inking device and the ink drive Gear 9 is the whole code 1
They are drivingly connected by a gear train indicated at 5. 1
Reference numeral 6 denotes an ink driving gear which is one of the gears in this gear train, and the ink driving gear 16 and the ink drive gear 9 are connected by intermediate gears 17 and 18 which also constitute the gear train 15. . The intermediate gears 17 and 18 are integrally formed and are loosely mounted on a stud 19 implanted in the frame 1, and a hexagonal head 20 as a spanner hook is provided on the outer surface of the intermediate gear 17. . By doing this, the intermediate gear 17 transmits the rotation of the ink drive gear 9 to the roller of the inking device, and after loosening the phase adjustment bolt 13, a spanner, which is a commercially available general tool, is applied to the hexagonal head 20. By rotating the plate cylinder 3, the phase between the plate cylinder 3 and the blanket cylinder is adjusted as described above.

With the above structure, rotation on the driving side is transmitted to the plate cylinder gear 11, and then to the gear center 7, which is integrally fixed between the plate cylinder 11 and the phase adjustment bolt 13 and the bolt 10. After that, it is transmitted to the plate cylinder 3, which is fixed to the gear center 7 and bolts 8. Furthermore, a plate cylinder gear 11 and a rubber cylinder gear 12
The blanket cylinder rotates due to the meshing with the ink drive gear 9, and the rotation of the ink drive gear 9 is transmitted to the roller group of the inking device by a gear train including intermediate gears 17, 18 and an ink drive gear 16.

In printing work carried out using such a drive train, as a result of mounting the plate 2 as described above, the position of the image relative to the paper may shift significantly due to a mistake in the plate-making process. Adjustment cannot be made within the adjustment range of the register adjustment device attached to the cylinder 3. Therefore, when the phase adjustment bolt 13 is loosened and a spanner is applied to the hexagonal head 20 of the intermediate gear 17 to rotate it, the ink drive gear 9 meshes with it.
The rotation is transmitted to the gear center 7 that is integrated therewith. In this case, the plate cylinder gear 11 has the rubber cylinder gear 1.
2 are in mesh, resulting in a large load, whereas the gear train 15 and the inking device have a small load, so the plate cylinder gear 11 remains stationary and the plate cylinder 3 remains within the range of the elongated hole 14. Rotate. Therefore, the phase between the plate cylinder 3 and the blanket cylinder can be largely adjusted within the range of the elongated hole 14, and the position of the pattern on the plate 2 can be largely adjusted with respect to the paper close to the circumferential surface of the blanket cylinder. I can do it. Note that the rotation of the intermediate gear 17 causes the rollers of the inking device to rotate, but this has nothing to do with the phase of the plate, and since the load is small, rotation is easy. After adjustment, the phase adjustment bolt 13 is tightened and fixed.

According to such a configuration, the phase of the plate cylinder 3 with respect to the blanket cylinder is skillfully utilized by the intermediate gear 18 that constitutes the gear train toward the inking device side, and the hexagonal head 20 provided on the outer surface of the intermediate gear 18 The rotation can be adjusted easily, reliably, and quickly using a wrench, which is a general tool used in the printing press, and there is no need for a dedicated coarse adjustment tool, which is wasteful in the past. It has the advantage of being able to reduce costs and reduce costs. Furthermore, in the configuration according to the present invention, the intermediate gear 18 that constitutes the gear train that is the rotation transmission system from the ink drive gear 9 to the ink device side is used as a phase adjustment means for the plate cylinder 3. , there is no problem with the meshing state with the ink drive gear 9 side, and problems such as damage to the gear as in the past can be eliminated, and the rotation adjustment operation can be performed stably, appropriately and reliably, and furthermore. There is also the advantage that there is no need for operating space for the use of a special tool with a pinion part as in the past, and the printing press can be made more compact.

FIG. 3 is a sectional view showing another embodiment of the present invention corresponding to FIG. 1, in which the gear center 7 provided in the previous embodiment is not provided and the ink drive gear 9 is not provided. is directly fixed to the end shaft 6 of the plate cylinder 3 by a bolt 21. and,
The plate cylinder gear 11 is loosely mounted on the end shaft 6, and is connected to the ink drive gear 9 by a phase adjustment bolt 2.
2, and by making the ink drive gear 9 penetrating portion of this bolt 22 into an elongated hole, the phase can be adjusted. The rest is the same as the previous embodiment. By doing this,
When the phase adjustment bolt 22 is loosened and the intermediate gear 17 is rotated, the phase between the plate cylinder 3 and the blanket cylinder is adjusted as in the previous embodiment. Furthermore, since this embodiment is provided with a scale plate 23 and a pointer 24 that display the phase adjustment angle, the adjustment can be made easier and more reliable by making adjustments while looking at these. It goes without saying that this can also be added to the embodiments described above.

As explained above, according to the present invention, an ink drive gear is fixed to the end shaft side of the plate cylinder of a rotary printing press, and the phase of the plate cylinder gear connected to the drive side to this ink drive gear can be adjusted. In addition to fixing the ink drive gear, an intermediate gear for adjusting the plate cylinder phase having a spanner hook on the outer surface is provided in the gear train that drives and connects the ink drive gear and the inking device roller, resulting in a simple and inexpensive structure. Nevertheless, the phase of the plate cylinder can be adjusted by simply loosening the bolt that fixes the ink drive gear and plate cylinder gear and adjusting the rotation of the intermediate gear using a spanner, which is a general tool available on the market. It has various excellent practical effects, such as being able to adjust the pattern over a wide range, and being able to deal with large deviations in the pattern relative to the paper extremely quickly and reliably. Furthermore, according to the present invention, the gear train for transmitting the drive of the inking device, which can make the rotation of the inking device rollers etc. more uniform than the conventional chain drive structure, is also used as a means for adjusting the phase of the plate cylinder. This not only makes it possible to perform rotation adjustment operations more stably, easily and reliably than when using a dedicated special tool, but it also simplifies the configuration of the printing press, making it easier to use than conventional tools. This eliminates the need for operating space for tools, making it possible to make the printing machine more compact.Also, even if a cover etc. is attached to the gear drive part, this can be done simply by providing a small hole for a wrench. It has advantages such as being able to make appropriate and reliable adjustments without interfering with operations.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the plate cylinder phase adjustment device for a rotary printing press according to the present invention, FIG. 1 is a sectional view thereof, FIG. 2 is a side view thereof, and FIG. FIG. 2 is a sectional view showing another embodiment corresponding to FIG. 1; 1... Frame, 2... Plate cylinder, 4... Bearing, 6
... End shaft, 9 ... Ink drive gear, 11 ... Plate cylinder gear, 15 ... Gear train, 17 ... Intermediate gear, 20
...Hexagonal head.

Claims (1)

[Scope of utility model registration request] In a rotary printing press equipped with a plate cylinder and an inking device roller that are rotatably supported in a frame via a bearing and are parallel to each other, an ink drive gear fixed to an end shaft side of the plate cylinder, and an ink drive gear fixed to the end shaft side of the plate cylinder, a plate cylinder gear that is concentrically fixed to a drive gear with a phase adjustment range and that transmits rotation transmitted from the driving side to the plate cylinder via the ink drive gear; and a plate cylinder gear for the ink drive gear and the inking device. 1. A plate cylinder phase adjustment device for a rotary printing press, comprising an intermediate gear for plate cylinder phase adjustment, which is a gear in a gear train drivingly connected to a roller, and has a spanner hook on an outer surface.