JPH0439008Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a swing roller drive device for reciprocating a rotating swing roller in an axial direction in an inking device of a printing press.

[Conventional technology]

The inking device of a printing press supplies the ink in the ink fountain to the plate surface on the plate cylinder through a large number of roller groups. A swinging roller is provided to even out the area.

FIG. 2 is a partially cutaway front view of a conventional swinging roller of this type and its driving device. This will be explained based on the figure. A swinging roller 2 is mounted on the left and right frames 1 via bearings 3. A bearing 4 is mounted on the frame 1 on the drive side.
, a rotation transmission shaft 5 parallel to the swinging roller 2 is
It is rotatably supported with a nut (not shown) restricting movement in the axial direction. A gear 6 is attached to the rotation transmission shaft 5 and meshes with a gear on the plate cylinder side, which is the driving side, so that the rotation transmission shaft 5 is driven from the driving side to rotate. . The protruding end of the rotation transmission shaft 5 is integrally formed with an oscillating shaft 7 having an axial center inclined by an amount θ in the figure with respect to the axial center. A lever 8 is rotatably fitted via a rolling bearing 10 fixed with a nut 9. Further, the rotation transmission shaft 5 connects a concentric shaft 5a integrally formed with the end surface of the swing shaft 7 to an out frame 11.
It is supported by rolling bearings. A spherical bearing 13 is fitted into the spherical bush 12 fitted to the housing 8a on the swinging roller 2 side of the swinging lever 8, and the elongated hole 13a, which is the inner hole of this spherical bearing 13, is connected to the end of the swinging roller 2. It is freely mounted on the shaft 14. And between the elongated hole 13a and the end shaft 14,
A gap indicated by the symbol t in the figure is formed. End shaft 1
A double nut 15 is screwed into the threaded portion of 4, and thrust bearings 16 and 17 are provided between the double nut 15 and the spherical bearing 13 and between the spherical bearing 13 and the stepped portion 14a of the end shaft 14, respectively. It has been intervened. A gap is formed between the spherical bearing 13 and the thrust bearings 16 and 17 by fixing them with a double nut 15 so that they can slide against each other.

With this configuration, the swinging roller 2 is driven from the driving side to rotate, the rotation transmission shaft 5 rotates, and the swinging shaft 7 performs swinging motion. As a result, the swing lever 8 swings about point P, and the housing 8a reciprocates in the axial direction of the swing roller 2 while sliding on the spherical bush 12 and the spherical bearing 13. Therefore, the swing roller 2 has a spherical bearing 13 and thrust bearings 16 and 1, as shown by a solid line and a chain line at its end shaft end.
7, and reciprocates in the axial direction while sliding the elongated hole 13a and the end shaft 14. In this case, since the gap t is provided between the spherical bearing 13 and the end shaft 14, there is no problem even if the spherical bearing 13 moves in an arc.

[Problem that the invention attempts to solve]

However, in such a conventional swing roller drive device, the spherical bearing 13, the thrust bearings 16, 17, the elongated hole 13a and the end shaft 1
4 constantly repeats sliding, the spherical bearing 13 and the end shaft 14, which are the sliding parts, not only wear out, but also the end shaft 14 swings and the swing roller 2
There was a problem in that this caused pulsations in the printing process, resulting in printing defects called streaks and slits.

[Means for solving problems]

In order to solve these problems, the present invention includes an oscillating member fitted to the end shaft of the oscillating roller through a spherical bearing, and a short oscillating shaft integrated with a rotation transmission shaft parallel to the end axis of the oscillating roller. The oscillating member fitted thereon was connected to each other so as to be slidable in a direction perpendicular to the axis of the oscillating short shaft.

[Effect]

When the swinging roller and the rotation transmission shaft rotate and the swinging member fitted on the swinging short shaft integrated with the rotation transmission shaft performs swinging motion, the swinging member slidably connected to the swinging member is rotated. The roller-side swinging member also swings, and the swinging roller reciprocates in the axial direction via the spherical bearing. In this case, since the oscillating motion is absorbed by the sliding connection, there is no problem even if the spherical bearing and the oscillating roller are fixed, so that this fixed part does not wear out or vibrate.

〔Example〕

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the swing roller drive device according to the present invention. In the figure, a swing roller 22 is rotatably supported on left and right frames 21 via bearings 23. , is rotated by being driven from the driving side. Also, frame 2 on the driving side
The bearing 24 fitted to the outer frame 1 and the bearing 26 fitted to the outer frame 25 have a rotation transmission shaft 27 parallel to the swinging roller 22, whose movement in the axial direction is restricted by a nut 28 and a snap ring 29. It is rotatably supported on the shaft. Reference numeral 30 denotes a gear that is pivotally attached to the rotation transmission shaft 27 with a key 31, and is meshed with a gear on the plate cylinder side that is the driving side.
7 is configured to be driven and rotated from the driving side. Out frame 25 of rotation transmission shaft 27
A short swinging shaft 32 having an axis tilted by the symbol θ in the figure with respect to the axis thereof is integrally formed on the side end portion. The housing 33 as a member is attached to the nut 3
It is rotatably fitted via a ball bearing 35 fixed at 4. On the other hand, the swing roller 22
A housing 39 serving as a roller-side swinging member is rotatably fitted into a spherical bearing 38 fixed to the end of the end shaft 36 with a nut 37 by fitting the spherical surface thereof. A pin 40 pivotally attached to the housing 33 and a pin hole 41 formed in the housing 39 are slidably fitted together, and as a result, the distance between the housing 33 and the housing 39 is set at the short axis of the swing axis. 32 in a direction perpendicular to the axis.

With this configuration, when the swinging roller 22 rotates, the rotation transmission shaft 27 rotates, and the swinging short shaft 32 rotates, the housing 33 fitted therein swings, and the swinging shaft 32 rotates. The swinging motion is transmitted to the housing 39 through sliding movement between the pin 40 and the pin hole 41. As a result, the housing 39 swings, and the swing roller 22 reciprocates in the axial direction while sliding on the spherical bearing 38 and the spherical surface of the housing 39. In this case, the distance between the housings 33 and 39 changes due to the reciprocating movement of the swinging roller 22 due to the swinging motion, but this is absorbed by the sliding movement between the pin 40 and the pin hole 41. There is no problem even if the spherical bearing 38 and the end shaft 36 are fixed, so that the end shaft 36 and the like do not wear out and the swinging roller 22 does not vibrate.

Note that the pin 40 may be provided on the housing 39 side, and the pin hole 41 may be provided on the housing 33 side.

[Effect of idea]

As is clear from the above description, according to the present invention, in the swinging roller drive device in the inking device of a printing press, the swinging member is fitted to the end shaft of the swinging roller via a spherical bearing, and the swinging roller end shaft is connected to the swinging roller end shaft. A parallel rotation transmission shaft and an oscillation member fitted on an integrated short oscillation shaft are connected to each other so as to be slidable in a direction orthogonal to the axis of the short oscillation shaft, and the rotation of the rotation transmission shaft causes both By configuring the oscillating roller to reciprocate through the oscillating member, the end shaft of the oscillating roller can be fixed to the spherical bearing, so they do not slide against each other, eliminating wear on the end shaft of the oscillating roller and increasing durability. At the same time, the swing roller does not pulsate and various printing problems can be solved. Furthermore, since the structure is simplified and the weight of the entire device is reduced, the load is reduced and the durability of the device is improved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the swing roller drive device in the inking device of a printing press according to the present invention, and FIG. 2 is a partially cutaway front view of the swing roller drive device in the inking device of a conventional printing press. be. 22... Swing roller, 27... Rotation transmission shaft, 3
0...Gear, 32...Short axis of swing, 33, 39...
... Housing, 36 ... End shaft, 38 ... Spherical bearing, 40 ... Pin, 41 ... Pin hole.

Claims (1)

[Scope of utility model registration request] A rotation transmission shaft supported in parallel with the swinging roller and drivingly connected to the driving side, and a neck formed integrally with the shaft end of the rotation transmission shaft and having an axis inclined with respect to the axis of the rotation transmission shaft. A swinging short shaft, a shaft-side swinging member rotatably fitted to the swinging short shaft, and a roller-side swinging member fitted to the end shaft of the swinging roller via a spherical bearing so as to be freely aligned. An oscillating roller drive device in an inking device of a printing press, characterized in that both of the oscillating members are slidably connected to each other in a direction orthogonal to the axis of the short oscillating shaft.