JP2961672B2 - Printing machine inking equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inking device for supplying ink from an inking roller to a plate on a plate cylinder in a printing press.

[0002]

2. Description of the Related Art In a rotary printing press, ink stored in an ink fountain flows out of a gap between an ink fountain roller and an ink blade by a predetermined amount and is carried around by the ink fountain roller. The ink is applied to the plate surface by an ink applicator roller which contacts the final swing roller and the plate on the plate cylinder via the roller. In this case, if the nip pressure between the ink applying roller and the plate cylinder is not set properly, the ink cannot be properly transferred from the ink applying roller to the plate surface, causing unstable ink transfer. In addition, it may cause damage to the bearing of each roller.

[0003] In view of these points, in order to properly set the nip pressure between the ink application roller and the plate cylinder,
Japanese Utility Model Application Laid-Open No. 58-96943 has been proposed. The inking device of the printing press proposed here has a holding plate rotatably mounted on the outer periphery of the end of the eccentric bearing of the plate cylinder, and one end rotatably mounted on the holding plate and the other end mounted on the other end. A screw shaft on which a nut is screwed, and a swing shaft having one end rotatably supported by the rotation support shaft of the swing roller and the other end rotatably mounted on the screw shaft, and rotatably supporting the ink application roller. It comprises a moving lever and a compression spring interposed on the screw shaft and elastically mounted between the swing lever and the nut. In such a configuration, when the holding plate is rotated,
The screw shaft swings, and the swing lever swings in accordance with the swing, and the attachment / detachment operation with respect to the peripheral surface of the plate cylinder is performed, thereby transferring the ink to the plate surface. The nip pressure is appropriately maintained by adjusting the amount of screwing of the nut to the screw shaft.

[0004]

However, in a conventional inking device for a printing press, one end of a screw shaft for adjusting a nip pressure is rotatably mounted on an outer periphery of an end of a bearing of a plate cylinder. , The nut screwed to the screw shaft is located near the peripheral surface of the plate cylinder. On the other hand, near the peripheral surface of the plate cylinder,
Various rollers such as swing rollers are provided. For this reason,
Since the nut for adjusting the nip pressure is surrounded by these various rollers, the adjustment operation becomes difficult, and the adjustment operation is practically impossible depending on the arrangement of the rollers. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to provide an inking device for a printing press in which a nip pressure adjustment position can be freely set and an adjustment operation is facilitated. Is to do.

[0005]

SUMMARY OF THE INVENTION To achieve this object, an inking device for a printing press according to the present invention rotatably supports an inking roller and swings the axis of a roller adjacent to the inking roller. A holding lever pivotally supported as a fulcrum, a ring rotatably supported by a bearing portion of the plate cylinder, a rod having one end connected to the ring, and a rod connected to the other end of the rod. An adjustment lever is supported on the same swing fulcrum as the holding lever so as to be swingable, and an adjustment screw connects the adjustment lever and the holding lever via a spring.

[0006]

In the present invention, the adjusting screw for connecting the adjusting lever and the holding lever is located away from the peripheral surface of the plate cylinder.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of an inking device of a printing press according to the present invention,
FIG. 2 is a side view showing the positional relationship between the first inking roller and the plate cylinder in a side view, and FIG. 3 is the side view also showing the positional relationship between the second inking roller and the third inking roller. FIG. In these figures, reference numeral 2 denotes an air cylinder which is attached to a frame 1 of a printing press with bolts 3, and is attached to one end of a shaft 5 rotatably supported by the frame 1 at the working end of a piston rod 2a. Lever 4 is pin-connected. A lever 6 is attached to a portion of the shaft 5 inside the frame 1, and one end of a rod 7 is pin-connected to the lever 6. Rod 7
Is connected to a ring 11 rotatably supported on an outer peripheral portion of the bearing unit 10 by a pin connection. The bearing unit 10 includes an eccentric bearing 10b attached to the frame 1 and a bearing 10a fixed to the eccentric bearing 10b.

The plate cylinder 12 is rotatably supported by a bearing 10a mounted on the frame 1 via an eccentric bearing 10b, is driven to rotate from the driving side, and is pressed against a blanket cylinder 13. Plate cylinder 12 and first and second swing rollers 1
The first, second, and third ink application rollers 15, 20, and 25 are in contact with the first and second ink application rollers 6, 20, and 26, respectively. The two oscillating rollers 16 and 26 are fixed to bearings 17 and 27 fixed to the frame 1.
And is rotatably driven from the driving side.

The first ink application roller 15 is provided via a bearing holder fixedly fastened to one end of a first holding lever 18 using a bearing 17 of the first swing roller 16 as a swing support shaft by a bolt 18a. The shaft 15a is rotatably supported. The second inking roller 20 includes the first swing roller 1.
The second holding lever 21 having the bearing 17 of FIG.
The shaft 20a is rotatably supported via a bearing holder fixedly fastened to one end by a bolt 21a. Third
The inking roller 25 is rotated by a shaft 25a via a bearing holder fixedly fastened to one end of a third holding lever 28 with a bearing portion 27 of a second swing roller 26 as a swing support shaft by a bolt 28a. It is freely supported.

Reference numeral 31 denotes a first rod, one end of which is a pin 30.
, And the other end is connected to a first adjustment lever 33 via a pin 32. The first adjustment lever 33 is swingable with the bearing 17 of the first swing roller 16 as a swing support shaft at a position separated from the first holding lever 18 in parallel in the thickness direction. Pins 33a and 18b are implanted at the other ends of the first adjustment lever 33 and the first holding lever 18, respectively. One end of a bolt 35 is fixed to the pin 18b,
A bolt 35 is attached to the pin 33a so as to be able to advance and retreat, and a compression spring 36 is interposed between the pins 33a and 18b. By varying the amount of screwing of the nut 37, the rotation urging force of the holding lever 18 in the direction of arrow A, that is, the nip pressure of the first ink application roller 15 with respect to the plate cylinder 12 is adjusted.

The first adjusting lever 33 and the first holding lever 18 are both connected to the bearing portion 1 of the first swing roller 16.
7 is used as a swing fulcrum, and a bolt 35 is provided at the other end opposite to the first rod 31 connected to the ring 11. , On the side opposite to the plate cylinder 12, ie the side of the person adjusting the printing press. Therefore, the first ink application roller 15 and the first swing roller 16 do not hinder the adjustment of the nip pressure, and the nip pressure can be easily adjusted. Also, the first adjustment lever 33 and the first
It is possible to freely select the direction and the length of the other end of the holding lever 18 to which the bolt 35 is connected, so that the position where the bolt 35 is provided is selected to a position where each roller is not provided. Thus, the work of adjusting the nip pressure can be made easier.

Reference numeral 41 denotes a third rod, one end of which is a pin 40.
And the other end is connected to a third adjustment lever 43 via a pin 42. The third adjustment lever 43 is swingable around the bearing 27 of the second swing roller 26 at a position spaced apart from the third holding lever 28 in parallel in the thickness direction. Pins 43a and 28b are implanted at the other ends of the third adjustment lever 43 and the third holding lever 28, respectively. One end of a bolt 45 is fixed to the pin 28b,
A bolt 45 is attached to the pin 43ab so as to advance and retreat, and a compression spring 46 is provided between the pins 433a and 28b.
Is interposed. By varying the screwing amount of the nut 47, the plate cylinder 12 of the third
Adjustment of the nip pressure.

A second rod 51 has a pin 50 at one end.
The other end is connected to the second adjustment lever 53 via a pin 52. The second adjustment lever 53 is swingable with the bearing 17 of the first swing roller 16 as a swing support shaft at a position separated from the second holding lever 21 in parallel in the thickness direction. The other ends of the second adjustment lever 53 and the second holding lever 21 have pins 53a and 21b, respectively.
Has been planted. One end of a bolt 55 is fixed to the pin 21b, the bolt 55 is attached to the pin 53a so as to be able to advance and retreat, and a compression spring 56 is interposed between the pins 533a and 21b. The nip pressure of the second ink applying roller 20 with respect to the plate cylinder 12 is adjusted by changing the screwing amount of the nut 57.

The operation will be described below. First, when performing a printing operation, the screwing amounts of the nuts of the respective adjustment screws 35, 45, and 55 are varied so that the respective ink application rollers 15, 20, 2,
The nip pressure on the plate cylinder 12 of No. 5 is adjusted to a predetermined value. After the adjustment, each roller is driven to rotate by driving on the driving side.
The three inking rollers 15, 20, 25 perform an inking operation on the plate cylinder 12 with an appropriate nip pressure.

At this time, since the air cylinder 2 is not operating and the ring 11 is fixed with respect to the bearing portion 10 of the plate cylinder 12, each of the rings 11 and the rods 31 and 41 connected to each other is fixed. The holding levers 18, 21, 28 are swingable around the swing shafts 17, 27, and the compression springs 36, 4, 4 are adjusted to adjust the nip pressure.
When compressing 6, 56, each adjusting lever 33, 43, 5,
3 can freely swing about the swing support shafts 17 and 27. Therefore, each holding lever 18, 21, 2
8, each of the ink applying rollers 15, 2 rotatably supported by
The plate cylinders 0 and 25 are pressed against the plate cylinder 12 only by the urging forces of the springs 36, 46 and 56, and the nip pressure adjustment by the springs 36, 46 and 56 is performed accurately, and the adjusted nip pressure is adjusted. Is held.

Next, at the time of printing, when a twisting operation is performed in order to adjust the position of the picture with respect to the printing paper, the eccentric bearing 10b is rotated by an adjusting device (not shown), and the center of the bearing 10a, ie, the plate The axis of the body 12 is moved. As the bearing 10a moves, the ring 11
Also moves, the first and third rods 31, 41 connected to the ring 11 also move, and the first and third adjustment levers 33,
43 swings. This swing swings the first and third holding levers 18 and 28 so that the first and third inking rollers 15 and 25 do not change the nip pressure with respect to the movement of the plate cylinder 12. Follow. At the same time, the swing of the third adjustment lever 43 causes the second adjustment lever 53 to swing via the second rod 51, and this swing is caused by the second holding lever 2.
1 and the second inking roller 20 follows the movement of the plate cylinder 12 without changing the nip pressure.

Finally, when the roller cleaning is performed after the printing operation, first, the air cylinder 2 is operated to advance the piston rod 2a downward, and the shaft 5 rotates through the lever 4. I do. With the rotation of the lever 4, the rod 7 is pushed upward in FIG. 2 via the lever 6, whereby the ring 11 rotates in the direction of arrow B in FIG. By the rotation of the ring 11, the first adjustment lever 33 swings clockwise in FIG. 1 around the swing support shaft 17 via the first rod 31, and the first holding lever 18 also Swings clockwise due to the connection of the first roller 15 to separate the first application roller 15 from the plate cylinder 12 to be in a detached state.

At the same time, the rotation of the ring 11 in the direction of arrow B causes the third adjustment lever 43 to pivot about the pivot shaft 27 in the counterclockwise direction in FIG.
8 also swings clockwise to separate the third inking roller 25 from the plate cylinder 12 to bring it into a detached state. Similarly, the second adjustment lever 53 swings clockwise around the swing support shaft 17, and the second holding lever 21 also swings clockwise to move the second inking roller 20 to the plate. It is separated from the body 12 to be in a detached state.

In this embodiment, the pivot point of the swinging roller of the adjusting lever and the holding lever is set to the axis of the swing roller. However, the present invention is not limited to this. Of course, the good things are. Further, the swing fulcrum of the adjustment lever and the holding lever is set as the bearing of the swing roller, but may be directly set as the rotation axis of the swing roller. In addition, three ink application rollers are provided for two oscillation rollers, but the present invention is not limited to this. One oscillation roller may be used for a plurality of ink application rollers. In addition, it is needless to say that one ink application roller can be used, and various design modifications can be made as needed.

[0020]

As described above, according to the present invention, the holding lever rotatably supporting the ink application roller, the ring rotatably supported by the bearing of the plate cylinder, and one end connected to this ring. And an adjustment lever connected to the other end of the rod. The holding lever and the adjustment lever are pivotally supported by a rotation support shaft of a roller adjacent to the ink application roller, and held. Since the lever and the adjustment lever are connected with the adjustment screw via the spring, the position of the adjustment screw can be set to a position where the adjustment screw can be easily adjusted, and thus the nip pressure can be easily adjusted. In addition, the ink application roller can be moved without changing the adjusted nip pressure for the twist of the plate cylinder.

[Brief description of the drawings]

FIG. 1 is a front view of an inking device of a printing press according to the present invention.

FIG. 2 is a side view of the inking device of the printing press according to the present invention, and is a developed view showing a positional relationship between a first inking roller and a plate cylinder.

FIG. 3 is a side view of the inking device of the printing press according to the present invention, and is a developed view showing a positional relationship between a second inking roller and a third inking roller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bearing part 11 Ring 12 Plate cylinder 15 1st inking roller 16 1st swing roller 18 1st holding lever 20 2nd inking roller 21 2nd holding lever 25 3rd inking roller 28 3rd Holding lever 31 first rod 33 first adjustment lever 35 bolt 36 compression spring 41 third rod 43 third adjustment lever 45 bolt 46 compression spring 51 second rod 53 second adjustment lever 55 bolt 56 compression spring

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B41F 31/30

Claims (1)

(57) [Claims] 1. A holding lever rotatably supported by an ink roller in a rotatable manner with the axis of a roller adjacent to the ink roller being a swing fulcrum, and rotatably supported by a bearing portion of a plate cylinder. A supported ring, a rod having one end connected to the ring, an adjustment lever connected to the other end of the rod and swingably supported at the same swing fulcrum as the holding lever; and And an adjusting screw for connecting the holding lever to the holding lever with a spring interposed therebetween.