JP2969538B2 - Swing roller drive for printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing roller driving device for driving a swing roller provided in an inking device or a water supply device of a printing press to reciprocate in an axial direction.

[0002]

2. Description of the Related Art A printing unit such as an offset rotary printing press is provided with an ink device for supplying ink to the surface of a plate mounted on a plate cylinder and a water supply device for supplying dampening water. The ink device includes an ink fountain in which ink is stored, an ink fountain roller which is rotated by being immersed in the ink in the ink fountain, and an ink application roller which detachably contacts the plate surface. A plurality of oscillating rollers and a kneading roller are disposed between the roller and the ink-applying roller such that the peripheral surfaces thereof are in contact with each other.

Further, the water supply device is provided with an original roller which rotates in a watercraft in which dampening water is stored, and a swimsuit roller which is in contact with the plate surface. A swing roller, a transfer roller, and the like are provided with their peripheral surfaces in contact with each other. With this configuration, an image is formed on the surface of the plate with the ink and the dampening solution supplied by these devices, and the image is transferred to the paper via the blanket cylinder. Printing is performed.

The above-mentioned oscillating rollers provided in the inking device and the water supply device which operate as described above are driven by a driving device to knead the ink and level the ink uniformly in each direction, or to level the dampening solution. The driving device is driven to reciprocate in the axial direction, and a conventional driving device for driving the reciprocating motion of the oscillating roller is generally configured as follows. That is, on the end shaft of the swing roller protruding outside the frame, a drive gear meshing with the driving gear and a worm are journaled, and on a driven shaft orthogonal to the swing roller end shaft, A worm wheel meshing with the worm is mounted on the shaft. The other end of the connecting rod having one end pivotally connected to the frame side is pivotally attached to the eccentric portion of the end surface of the worm wheel.

[0005] With this configuration, when the driving gear is driven by the driving side and the driving gear rotates, the swing roller having the driving gear mounted on the end shaft rotates, and the worm on the end shaft rotates. As a result, the worm wheel meshing with the worm rotates, and the end of the connecting rod pivotally attached to the eccentric portion of the end surface orbits around the driven shaft due to the eccentric action, but one end of the connecting rod is pivotally attached to the frame side. The worm wheel reciprocates in a crank shape with the driven shaft and its bearing. Therefore, the worm and the swing roller reciprocate in the axial direction integrally.

[0006]

When a plurality of swing rollers reciprocate with the same stroke and the same phase, not only a sufficient ink kneading effect cannot be obtained in the case of an ink device, but also a plurality of swing rollers. When the rollers reciprocate in the same stroke and in the same phase, a large inertial force is generated due to the reciprocal motion, which adversely affects the entire printing unit, and causes a problem that a printing failure such as uneven color or a shock is generated. Therefore, conventionally, the reciprocating phases of a plurality of swing rollers are shifted from each other.

However, in the conventional swing roller driving apparatus, when adjusting the reciprocating phase of the swing roller, the drive gear fixed to the end shaft of the swing roller by a key or the like is released, and then the swing roller is released. By rotating the worm wheel through the worm to move the connecting position of the connecting rod, which involves cumbersome operations such as unlocking the drive gear. In addition, there is a problem that a great deal of labor is required and the burden on the worker is increased, and that a long time is required for the work and the operation rate of the machine is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a swing roller driving device for a printing press, which can easily adjust the reciprocating phase of the swing roller in a short time. And

[0009]

In order to achieve the above object, according to the present invention, in a swing roller driving device of a printing press, a worm is fixedly and non-fixably fitted to an end shaft of the swing roller via a span ring. The holding member rotatably supporting the worm is supported by the supporting member on the frame side so as to be able to advance and retreat in the axial direction of the end shaft, and the worm wheel meshing with the worm is rotatably held by the holding member. Then, a portion on the worm wheel side, which is eccentric with respect to the center thereof, and the frame side were connected by a connecting member.

[0010]

When the swing roller rotates, the worm fixed to the end shaft rotates, the worm wheel meshing with the worm rotates, and the worm wheel side pivot of the connecting member connecting the worm wheel side and the frame side. Since the attachment portion makes a circular motion due to the eccentric action, while the worm and the worm wheel are engaged, the swing roller reciprocates in the axial direction with the holding member, the worm and the worm wheel.

In order to adjust the reciprocating phase of the swing roller, the worm and the swing roller end shaft are unlocked by the spanning ring, the swing roller is moved in the axial direction to a required position, and then the worm wheel is rotated. Then, the holding member, the worm and the worm wheel move in the axial direction, so stop the movement at the position where the relative position between the swing roller and the worm is the same as before adjustment, and fix the spanning ring to adjust the phase. Ends.

[0012]

1 is a partially cutaway front view of a swing roller driving device of a printing press showing an embodiment in which the present invention is applied to an inking device of the printing press. In the figure, the swing roller 1 has an end shaft 1a protruding from the frame 2 to the outside. On this end shaft 1a, a drive gear 3 drivingly connected to the driving side is fixed by a fixed plate 4. A cylindrical worm 5 is rotatably fitted to the small diameter portion of the end shaft 1a, and the worm 5 is fixed or non-fixed to the end shaft 1a by a spanning type fixing device 6. Is configured.

That is, in the annular space formed between the inner periphery of the thin portion formed at one end of the worm 5 and the outer periphery of the end shaft 1a, an annular spacer 7 and an annular member having a triangular cross section are formed. The spacer 7 and the spanning ring 8 are pressed in the axial direction by an annular presser 9. At the center of the end surface of the end shaft 1a, a holder 10 having a U-shaped cross section is provided with a bolt 1 screwed into a screw hole of the end shaft 1a.
The presser foot 9 is screwed into a screw hole of the holder 10 and is pressed by a plurality of bolts 13 fixed by nuts 12. Then, by pressing the presser foot 9 with the bolt 13, the diameter of the spanning ring 8 is expanded by the action of the inclined surface, and the end shaft 1a and the worm 5 are fixed.

Reference numeral 14 denotes a support shaft which is implanted in the frame 2 via a holder 15 in a state parallel to the end shaft 1a.
4, a retainer 16 as a retaining member having a circular hole 16 a is supported so as to be able to advance and retreat in the axial direction of the support shaft 14. A worm wheel 18 that meshes with the worm 5 is rotatably supported by a boss formed at the center of the boss, the outer periphery of which is engaged with the circular hole 16a. ing. Reference numerals 19 and 20 denote thrust bearings interposed between the rolling bearing 17 and the bearing retainers 21 and 22 on the end shaft 1a side.

Reference numeral 23 denotes one end of the worm wheel 18 which is pivotally connected to an eccentric position of the worm wheel 18 with a pin 24 and a pin 2 with a snap ring 25.
4 is a connecting rod as a connecting member which is prevented from coming off from the bracket 4, and is pivotally connected to a bracket 26 on the frame 2 side with a pin 27, and is connected to the pin 27 by a snap ring 28.
Is prevented from falling out. Thus, when the worm wheel 18 rotates, the retainer 16 advances and retreats along the support shaft 14 together with the worm wheel 18, and the swing roller 1 rotates through the worm 5 integrated with the worm wheel 18 in the axial direction. While reciprocating in the axial direction.

The operation of the oscillating roller driving device configured as described above will be described. When the swing roller 1 rotates, the worm 5 fixed to the end shaft 1a rotates and the worm wheel 18 meshing with the worm 5 rotates,
Since one end of the connecting rod 23 pivotally attached to the end face eccentric position of the worm wheel 18 makes a circular motion, the retainer 16 reciprocates along the support shaft 14 while the worm 5 and the worm wheel 18 are engaged with each other. After passing through the worm 5 and the worm wheel 18, the swing roller 1 integrated therewith reciprocates in the axial direction, and the ink transferred from the ink fountain is kneaded.

[0017] The reciprocating phase of the oscillating roller 1 when adjusting to other distributor roller, when loosening the bolt 11, away from the tip presser foot 9 of the bolt 13 the holder 10 is apart from the end face of the end shaft 1a Since the fixing of the worm 5 and the swing roller end shaft 1a by the spanning ring 8 is released, the swing roller 1 is moved in the axial direction to a required position.
When the worm wheel 18 is rotated, the retainer 16, the worm 5, and the worm wheel 18 move in the axial direction. Therefore, the movement is stopped at a position where the relative position between the swing roller 1 and the worm 5 becomes the same as before the adjustment. The phase adjustment ends when the spanning ring 8 is fixed.

In this embodiment, an example is shown in which one end of the connecting rod 23 is pivotally connected to the eccentric portion of the worm wheel 18. However, a disk or the like is fixed coaxially with the worm wheel 18 and connected to the eccentric portion. One end of the rod may be pivoted. Further, in the present embodiment, an example in which the present invention is applied to an inking device of a printing press is shown. However, the present invention can be applied to a water supply device in the same manner, and the same effect can be obtained.

[0019]

As is apparent from the above description, according to the present invention, in a swing roller driving device for a printing press, a worm is fixedly and non-fixedly fitted to an end shaft of a swing roller via a spanning ring. A rotatable holding member is supported by the supporting member on the frame side so as to be able to advance and retreat in the axial direction of the end shaft, and a worm wheel meshing with a worm is rotatably held by the holding member.
By connecting the worm wheel side and the eccentric part to the center and the frame side with a connecting member,
The swing phase adjustment of the swing roller is replaced with the troublesome and labor-intensive work of releasing the fixing of the end shaft of the swing roller and the drive gear as in the related art, and the leading end of the swing roller end shaft having an open working surface. The phase of the swing roller can be adjusted by a simple and easy work of loosening the bolts at The operation rate improves.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a swing roller driving device of a printing press.

[Explanation of symbols]

 Reference Signs List 1 swing roller 1a end shaft 3 drive gear 5 worm 6 fixing device 8 spanning ring 9 presser foot 11 bolt 13 bolt 14 support shaft 16 retainer 18 worm wheel 23 connecting rod 24 pin 27 pin

Claims (1)

(57) [Claims] 1. A worm fixedly and non-fixedly fitted to an end shaft of a swing roller via a span ring, and the worm is rotatably supported, and is supported by a supporting member on a frame side to be able to advance and retreat in the axial direction of the end shaft. A worm wheel rotatably held by the holding member and meshing with the worm; and a frame having one end pivotally mounted at a position on the worm wheel side and eccentric with respect to the center of the worm wheel. A swing roller driving device for a printing press, comprising: a connecting member having the other end pivotally mounted on a side thereof.