JPS6122949A - Inking roller device for offset press - Google Patents

Abstract

PURPOSE:To obtain an inking roller device, in which the arrangement of stringy filaments generated on the transition of ink is randomized and the generation of the unevenness of printing is eliminated completely, by mounting a roller rocked in the axial direction by a mechanism incorporated in itself while being brought into contact with a final inking roller and being turned. CONSTITUTION:Since a roller proper 19 for a rocking metallic roller 10 receives the revolving torque of a final inking roller 8 held between a reciprocating metallic roller 9 and a plate cylinder and is rotated, the speed of a bearing member 22 is made smaller than the speed of revolution of the final inking roller 8 and slid and rolled in the circumferential direction along guide grooves in an outer ring 20 and an inner ring 21 as differential means. A rocking cam member 23 is also decelerated and turned with the rolling of the bearing member 22 at that time, but motion rocking in the axial direction is generated in parallel in response to the cam curve of an end-surface cam section 27 because the end- surface cam section 27 is brought into contact with a fixed cam roller 28. The rocking motion is transmitted over the outer ring 20 through the bearing member 22 from the rocking cam member 23, and changed into force which rocks the roller proper 19 unified with the outer ring 20 in the axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an offset printing machine, and in particular to an offset printing machine, in which the press is rotated in contact with a final applicator roller or a reciprocating metal roller;
This invention relates to an ink roller device that is equipped with a roller that swings in the axial direction by a built-in mechanism to randomize the arrangement of thread-like filaments that occur during ink transfer, thereby eliminating the occurrence of printing unevenness.

Transfer of printing ink is the most basic and important part of the printing process.
This is an important issue, and it can also be said that it is printing itself. In other words, the essence of printing is to spread the ink discharged from the ink reservoir uniformly on the aυ crawler, transfer the ink film with a uniform thickness from the final application roller onto the printing plate, and then apply the ink film from this printing plate to the blanket. After the transfer, strong pressure is finally applied to transfer the transfer onto the paper. In order to ensure such transfer of ink, a large number of kneading rollers are provided in the inking device of an offset printing machine, and the ink is sheared and separated many times between these rollers, thereby causing Fluidity will increase and become more uniform. The ink is transferred one after another between these rollers, receives shear energy, and is kneaded to form a uniform ink film thickness. In other words, an offset printing press is equipped with an ink roller device consisting of a combination of a rigid metal roller that reciprocates in the axial direction and an elastic roller such as a rubber roller, which repeatedly applies ink. The ink is sheared and separated to increase its fluidity, and the thickness of the ink film is evenly leveled, thereby kneading the ink. The ink is then torn off and transferred one after another between the metal roller and rubber roller, between the roller and the printing plate, between the printing plate and the blanket, and between the blanket and the paper.

By the way, when the mechanism of ink splitting is observed microscopically, when the ink splits between the rollers, ink filaments are formed that extend like threads from the ink film surface in the radial direction of the rollers. FIG. 4 is a diagram schematically showing the pattern of ink splitting between rollers that are in contact with each other. After the ink films of both rollers are brought together and pressurized, the ink film is separated on each roller, and the ink film is separated on each roller. The outermost part of the separated ink film is gradually stretched into a filament, and is torn off one by one after a certain distance t, while maintaining the filament (that is, an ink filament).
The process returns to the ink film on the roller. The generation of such ink filaments is caused by the viscoelasticity of the ink, and the outermost part of the kneaded ink sticks to the image of ink splitting and stretches into strings that cannot be torn. This occurs significantly when there is a large amount of ink.

Here, considering the influence of thread-like filaments on printing quality, the ink film surface on which the thread-like filaments have returned will have a height difference in ink thickness corresponding to the amount of the filaments. When prized, the area where the thread-like filament has a sticky layer becomes higher than other areas. Of course, even if the irises become higher, it is a change in height in a microscopic sense. However, the difference in height of the ink film (non-uniformity of the ink film) generated in this way is directly transferred to other rollers, plates, blankets, and even paper, resulting in uneven printing. The generation of thread-like filaments is unavoidable in the ink splitting mechanism, and among them, there are cases in which the arrangement of thread-like filaments is favorable for printing.
As shown in Figure 5, 1. This is a state in which the filaments are arranged completely randomly and have no particular directionality.

By the way, Figure 5 shows an enlarged sample of the ink film on the roller surface on a thin piece.The black areas are the areas where thread-like filaments are present, and the filaments are distributed in a so-called matte pattern. ing. On the other hand, when the arrangement of thread-like filaments is not favorable for printing, as shown in FIG. This is a condition in which the ink film is lined up with regularity, and the heights of the ink film are clearly visible as many vertical or horizontal lines.

Considering the reason why the ink filaments are arranged regularly like a thread, it is found that simply rotating the two rollers that come into contact with each other during ink splitting cannot
As shown in the figure, the ink filaments are aligned in the circumferential direction. In order to solve this problem, one of the two rollers in contact with each other is reciprocated (this is a so-called reciprocating metal roller). However, when the amount of ink supplied is large or the printing speed is high, although the regular arrangement of the acid root rollers in the circumferential direction is eliminated, the reciprocating metal roller moves back and forth, so the situation in FIG. As shown, the ink filaments may become aligned in the axial direction of the roller. The arrangement of these ink filaments (after all, they are lines) is not corrected in any way and is transferred one after another, causing printing unevenness.

In order to achieve good ink transfer in order to prevent the above-mentioned poor printing quality caused by thread-like filaments, we first need to consider the properties of the ink and the consequences thereof. ＋K Please keep in mind. However, recently, printing 4J [
With the expansion and diversification of ink, the types and characteristics of ink are also becoming more diverse.Therefore, rather than relying on improving the characteristics of ink, it is desirable for the printing press itself to have a function to prevent the occurrence of printing unevenness.

Further, in order to prevent uneven printing, it is desirable that the printing speed be slow, but it is a well-known fact that the printing speed tends to become faster and faster. Furthermore, the amount of ink also depends on the properties of the paper (
For example, absorbency. ), and a large amount of ink is delivered in response to the image area, but the more ink is delivered, the more likely the thread-like filaments will have an undesirable effect on the ink film. Therefore, it is desired that the printing press itself has a function that eliminates the inconvenience caused by thread-like filaments. in the end,
In the modern printing environment, there are a combination of conditions that make thread-like filaments more likely to occur, and unless the printing machine itself is equipped with a prevention function, thread-like filaments will become oriented in the axial and circumferential directions of the rollers. This causes the ink film to be aligned, and the difference in height of the ink film appears in the printing result.

In JP-A No. 55-57470, an ink deposition roller (interposed between the plate cylinder and the reciprocating roller), which rotates and transfers the ink from the reciprocating roller to the plate cylinder, is introduced.
This is the final application roller. ) is disclosed in which the reciprocating rollers are pressed to swing axially at a different cycle than the reciprocating rollers.

However, it is not preferable to oscillate the rollers of the layer that is in direct contact with the printing plate because the reproducibility of the image is insufficient, especially in the case of fine-grained printing. Further, in this technique, a device 11 is employed which receives force for swinging the roller from a reciprocating metal roller through a gear.

However, the rollers, which are rubber rollers, inevitably wear out as the period of use passes, and as the wear progresses, the axes of both rollers must be brought closer together to reduce the contact force between the rollers. . However, gears wear out less than rollers, so if the gears are forced too close to each other, they become out of mesh, causing abnormal noises and problems.

'Furthermore, in Japanese Patent Publication No. 55-45389, a technique is disclosed in which a metal roller that oscillates with a long stroke is further superimposed with a short stroke oscillation. However, the weight (moment of inertia) It is not desirable to force such a complicated movement on the large metal roller itself. In addition, since the rollers that make the short strokes are far from the print, the ink must be split many more times before it reaches the print surface, resulting in the reappearance of the negative effects of the filament.

Furthermore, in JP-A No. 56-148562, the ink sensor that rotates in contact with the circumferential surface of the plate cylinder is rotatably and slidably supported on both end shafts, and the ink sensor that rotates against the circumferential surface of the plate cylinder is rotatably and slidably supported. An inking device is disclosed that carries a rider roller 2- that is brought into contact with a surface of the roller, and a drive device that causes the rider roller to reciprocate in the axial direction. However, since this device requires a separate drive device to drive the rider roller, which is a simple roller, the manufacturing cost is high and it also occupies a large amount of installation space in the printing press.

In addition, in Japanese Patent Publication No. 43-23702, an oscillating roller (a reciprocating metal roller to be described later) has a deflection ring having a wedge-shaped groove, a ball that fits into this groove, and an annular protrusion provided on the roller side. The corresponding structure of , ) is disclosed. However, even with this type of oscillating roller structure, it is difficult to manufacture wedge-shaped grooves, etc., and since it is a gear drive system, as mentioned above, it is difficult to adjust the shaft position when the rubber roller that makes contact wears out. In addition, the rotation speed of the roller cannot be reduced.

The present invention has been made to fundamentally solve the above-mentioned problems, and provides an advanced ink roller device 6. First, the present invention has the following objectives: The purpose is to prevent the thread-like ink filaments from becoming regularly aligned in the axial direction or circumferential direction of the roller even if the ink filaments change. The second purpose is to prevent the above-mentioned inconveniences by using the printing machine alone, without requiring any special burden on the printing process or mechanism. The third objective is to realize a device that is simple, easy to manufacture, and does not consume space because it eliminates the alignment of ink filaments.

In order to achieve these objects, the ink roller device according to the present invention contacts the final application roller and swings in the axial direction in parallel with the final application roller that contacts the print and receives rotational force due to friction. It is equipped with an oscillating metal roller. In addition, an ink roller device according to the present invention is a swinging metal roller that is rotatably and swingably supported on a shaft, and has a roller main body that is rotated in contact with a final forming roller, and a roller main body that is rotated in contact with a final forming roller. An outer ring that rotates integrally with the inner periphery of the end, an inner ring that is loosely connected to the shaft in correspondence with the outer ring, and an arrangement in which the circumference is equally divided between the outer ring and the inner ring, with the position being regulated by the outer ring and the inner ring. A differential means, which is a sliding reduction mechanism, has a large number of bear link members interposed in the roller body, and a large number of toothed parts provided at one end, which are rotatably and swingably engaged with a shaft inside the roller body. is held and abutted between the bearing members, and an end face cam portion formed at the other end contacts a cam roller fixed to the shaft;
The spring member is wound around the shaft end and constantly presses the swinging cam member against the cam roller via a differential means. Finally, as a variant, the present invention provides a reciprocating metal roller that contacts the final application row 2- and generates a rotational force due to friction from the reciprocating metal roller in parallel with the reciprocating metal roller that is reciprocated in the axial direction by the driving means. It is equipped with an oscillating rubber roller that receives the support and oscillates in the axial direction.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a roller arrangement diagram showing one embodiment of an ink roller device of an offset printing press according to the present invention, 1 is a plate cylinder, and 2 is a printing plate attached to this plate cylinder 1. . Needless to say, offset printing machines require this plate cylinder 1.
In addition, a blanket cylinder and an impression cylinder are provided, but illustration of these is omitted. Further, 3 indicates an ink reservoir of the inking device, and the ink stored in this ink trap 3 is
The amount of ink sent out is adjusted by the ink blade, and the ink is deposited on the surface of the ink source roller 4. 5 is the ink source roller
A rotating roller is shown that moves intermittently between the rotating roller 5 and the vibrator roller F6, and the intermittent movement of the rotating roller 5 feeds an appropriate amount of ink to the roller group below the vibrator row 2-6. That is, a large number of roller groups are provided between the plate cylinder 1 on which the printing plate 2 is installed and the vibrator roller 6, and the ink is kneaded by these roller groups, and the splitting and transfer of the ink is repeatedly observed. Shear energy is applied to the ink. and,
The ink increases its fluidity by kneading and is homogenized to form an ink film. In one drawing, the rubber roller is
The metal roller, which is represented as a heavy circle and reciprocates in the axial direction, is shaded. These rubber rollers are made of, for example, tolyl-butadiene rubber), and the surface of the metal roller is made of II
It is coated with ILSAN or ebonite.

Note that 7 refers to the entire dampening water supply # device.

Now, the ink roller device according to the present invention focuses on the following rollers behind these roller groups. That is, 8 indicates the final application roller that contacts the printing plate 2 of the printing cylinder 1, and is four rubber rollers from 1st to 4th t along the rotation direction of the printing cylinder 1 shown by the arrow. Further, reference numeral 9 indicates a reciprocating metal roller that contacts these final forming rollers 8, and is driven in the axial direction by a known drive means such as a crank transmission with a stroke of 0 to 3511 m+ during two rotations of the plate cylinder 1. It is set to make one round trip.

Incidentally, the reason why the reciprocating metal roller 9 reciprocates in the axial direction in this way is to prevent ink streaks from occurring in the circumferential direction of the roller as described above, and also to prevent the occurrence of ink streaks in the circumferential direction of the roller. The @-turn causes one to go down,
This is to make it convenient to adjust the one-degree change in ink on the printing plate.

Eight final application rollers, which themselves do not have driving means, are located between the plate cylinder 1 and the reciprocating metal roller 9, and transfer ink to the printing plate 2 while rotating at the same peripheral speed as these rollers. Further, reference numeral 10 denotes an oscillating metal roller which is in contact with the final forming roller 8 and receives rotational force, and is provided parallel to the most forming roller 8 which is closest to the printing plate 2 among the rollers.

Note that it is not necessary to provide the oscillating metal roller 10 to all of the four final application rollers 8, and it is possible to selectively provide the oscillating metal roller 10 to any one of them. In making this selection, consideration must be given to the relationship with the arrangement space of the roller group, the ratio of the ink feeding amount to each of the four final forming rollers 8 (usually the first one is the largest), etc. In fact, even when only one final application roller 8 was provided with an oscillating metal roller 10, a significant improvement in print quality was observed.

A partial sectional view showing details of the final forming roller 8 and the oscillating metal roller LOW is shown in Figure 2, and the frame 1 of the printing press.
A flat bearing 12 is fitted to the roller end 1 (although the positive sign on the roller end side is shown, the other end side has a much simpler structure and can be understood without being illustrated). A reciprocating metal roller 9 is pivotally supported by 12 so as to be rotatable and reciprocating. Note that, as described above, this dowel metal roller 9 is driven by a drive means such as a crank transmission device f (not shown). The final application roller 8, which itself does not have a driving means, has an elastic layer 13 on its surface and a bearing 1.
It is rotatably attached 9 to the roller arm 15 via 4. This roller arm □15 is the plain bearing 1
It is associated with the reciprocating metal roller 9 by an eccentric sleeve 16 attached to the outer periphery of the roller 2, and the pivot support 1T of the oscillating metal roller 10 is also attached. The roller arm 15 is pressed to an adjustable level by an elastic member (not shown), and the reciprocating metal roller 9
The final applicator roller 8 is brought into contact with appropriate pressure. The reasons for adopting such a roller arm 15 are, firstly, that the final forming roller 8 can be easily cut off from the plate cylinder 1 (so-called " ) It comes out because it is necessary. The second reason is that the elastic layer 13 of the final application roller 8, such as NBR,
When this roller wear occurs, the eccentric sleeve 16 is rotated around the rotation of the plain bearing 12, and the distance between the axes of the reciprocating metal roller 9 and the final application roller 8 is adjusted. This is because the contact force between the rollers 8 and 9 is kept constant over the axial direction. Adjustment of the axis distance to deal with roller wear is also required between the final stage roller 8 and the oscillating metal roller 10, but in this case the axis 1B of the oscillating metal roller 10 is By eccentrically supporting the fixed shaft support IT,
Try to keep the contact force constant. In the present invention, adjustment of the distance between the shafts to cope with such roller wear is possible because there is no intervening gear or the like other than the roller itself.
This can be done extremely easily.

While being rotated by the final application roller 8, it oscillates in the axial direction using the rotational force caused by the friction, and the final layer microscopically randomizes the ink film transferred from the roller 8 to the printing plate 2 by the burr. The oscillating metal roller 10 has a major feature in its oscillating movement mechanism, which is comprised of a slide reduction mechanism and a motion conversion mechanism built into itself. That is, the shaft 18
As described above, the roller body 19 is fixed to the roller arm 15 by the shaft support 17, but the roller body 19, which is a coated hollow metal cylinder, has a final stage fixed to the elastic layer 13 on the surface of the roller 8. They are rotated by contacting each other with a contact pressure of , and the rotational force is further converted into an axial rocking motion, causing the shaft to rock in the axial direction. The mechanism that provides this rocking motion does not simply convert the rotational force of the roller 80 into rocking motion in the axial direction, but generally the rotational speed is quite fast (especially when the printing speed is high). In view of this, the rotational speed is reduced to a fraction or less, and then the oscillating motion in the axial direction is generated. The rate of deceleration can be selected as appropriate by the designer, starting with a rocking interlock in the decelerated phase,
The soil has improved in a microscopic sense the surface condition of the ink film on the final application roller 8 with which the oscillating metal roller 10 comes into contact, and can be transferred to the printing plate 2. In order to generate rocking motion of the roller body 19 in the decelerated phase, an outer ring 20 fixed at a low level by a strut ring or the like is provided on the inner periphery of the end of the roller body 19 so as to rotate together with the roller body 19. In addition, a small-diameter inner ring 21 is loosely engaged with the shaft 18 in correspondence with the outer ring 20.The outer ring 20 and the inner ring 21 each have guide grooves on the inner and outer peripheries. A large number of bearing members 22 are arranged along the lateral grooves.As shown in FIG. 3, which is a view from the direction of the arrow layer in FIG. In the ring-shaped space between the inner ring 21 and
It is interposed at the position where it is regulated by a guide groove in the circumferential direction. Therefore, when the roller body 19 receives rotational force from the final roller 8, slippage occurs between the outer ring 20 and the bearing member 22, which are integral with the roller body 13, and between the bearing member 22 and the inner ring 21. Therefore, compared to the rotation speed of the roller body 190 (that is, the final stage is the rotation speed of the roller 8),
The rotation speed of the bearing member 220 in the circumferential direction is reduced to a fraction or less.

Therefore, the outer ring 20, the inner ring 21, and the bearing member 22 constitute a differential means that performs a sliding reduction effect that causes the bearing member 22 to roll at a reduced speed in the circumferential direction. In addition to the illustrated ball bearing, a roller bearing can be used as the bearing member 22. Further, the bearing member 22 and the like simultaneously serve as means for supporting the shaft 18 of the roller assembly body 19.

Bearing member 224! After the rotation speed of the bearing member 220 in the circumferential direction is reduced by the differential means of =, compared to the rotational speed of the roller body 190, this transfer must be converted into a rocking motion in the axial direction. For this purpose, a swing cam member 23 and a spring member 24 are provided. The swing cam member has a unique cylindrical shape, and is connected to the shaft 18 through the bushing 25 inside the roller body 19.
It is engaged in a swingable and rotatable manner. A large number of toothed portions 26 provided at one end are inserted between each of the bearing portions 22 arranged at equal intervals, one tooth at a time, as best shown in FIG. The bearing member 22 engages with the sides of the tooth-shaped N526, and the bearing member 22 is in contact with the valley of the tooth-shaped N526. Of course, the number of teeth and dimensions (including clearance) of the toothed portion 26 are determined in relation to the bearing member 22, the outer ring 20, the inner ring 21, etc., and there is nothing that impairs the cleaning deceleration effect of the differential means. Must not be. In addition, the swing cam member 2 is cylindrical.
An end surface cam portion 21 is formed at the other end of 3, and this end surface cam portion 27 contacts a cam roller 28. This cam roller 28 is fixed to the shaft 18 by a roller pin 29 and is rotatable about a plane parallel to 41118. The cam shape of the end cam portion 2T is a matter of design, but when the swing cam portion #23 rotates once at a reduced speed,
It is possible to cause the stroke to swing in the axial direction.

The spring member 24 constantly presses the end cam portion 27 of the swing cam member 23 against the cam roller 28 via a differential means such as a bearing member 22, and is connected to a collar 30 fixed to the end of the shaft 18. This is a compression spring that is wound around the shaft 18 between the inner ring 21 and the end surface thereof. Note that 31 indicates a cover that protects the spring member 24. It will be readily appreciated that the rocking motion mechanism according to the present invention is easy to manufacture and assemble and is very inexpensive.

Here, the transmission and conversion of force in the swing motion conversion mechanism and the sliding reduction mechanism will be explained. Spring member 2
The axial pressing force No. 4 is transmitted from one end of the inner ring 21 to the bearing member 22, and serves to constantly press the bearing PJ1; material 22 in the right direction in the drawing. At this time, the bearing member 22 is attached to the toothed portion 26 at one end of the swing cam member 23.
Therefore, the swing cam member 2
3 is also pressed to the right in the drawing, and its end cam portion 21 is pressed against the cam roller 28. Since the roller main body 19 is rotated by the rotational force of the final application roller 80, the bearing member 22 is aligned with the guide grooves of the outer ring 20 and the inner ring 21 of the differential means, and the bearing member 22 is rotated by the final application roller 80.
It slides and rolls in the circumferential direction at a speed lower than the rotational speed. At this time, the fourth force member 23 is also rotated at a reduced speed with the transfer of the bearing member 22, but since the end cam portion 2γ is in contact with the shaft 18 and the fixed cam roller 28, the cam curve of the end cam portion 21 is In response to this, an axial rocking motion occurs in parallel. This rocking motion, on the other hand, is transmitted from the rocking cam member 23 to the outer ring 20 via the bearing member 22. Then, the roller body 1 integrated with this outer ring 20
This becomes the force that finally causes the shaft 9 to swing in the axial direction. It is preferable to set the stroke of this swinging motion to about 3 to 5III for improving printing quality, and it is preferable that the swinging motion be made in small increments and random. It should be noted that the outer diameter of the hollow oscillating metal roller 10 that performs small oscillating movements is smaller than the outer diameter of the final application roller 8 as illustrated.

Next, the effects of the above embodiment will be explained.

In response to the rotational force of the final forming roller 8 held between the reciprocating metal roller 9 and the plate cylinder 10, the oscillating metal roller 10 is oscillated in the axial direction at a decelerated phase as described above. As a result, when the ink splits between the oscillating metal roller 10 and the final application roller 8, the position t of the ink filament breakage that occurs between both rollers based on the viscoelasticity of the ink is aligned in the direction of the contact position between the rollers. Stop by. In other words, rather than the ink filament stretching far away from the roller-to-roller contact point and not cutting.

As soon as it passes the contact point, it is immediately separated. For this reason, the length of the ink filament returning to the roller is short, and the direction of return changes, so it is completely randomly distributed on the roller surface, resulting in a fine roller surface with little difference in height. . Here, "random" means that the shortened ink filaments vary in size and position. In addition, the ink filaments that had already occurred in the mixing roller group before the reciprocating metal roller 90 are renewed once again at the final stage just before printing plate 2.
Randomized by Nb metal roller 10. Therefore, no matter how many printing conditions there are, such as ink filter, ink characteristics, or printing speed, there is a negative effect on print quality caused by the alignment of filaments based on the functions of the printing machine itself. can be fundamentally eradicated.

Therefore, the thread-like filaments generated at the line of ink splitting between the ink rollers are transferred to the printing plate 2 in a dimensionally and positionally randomized manner, resulting in uniform distribution of the ink over the image area and ensuring good print quality. can do.

The ink roller device according to the present invention may have other modifications, which will be explained with reference to FIG. 1 again. An oscillating rubber roller 32 is shown by a dotted line in the drawing), and this oscillating rubber roller 32 comes into frictional contact with one or both of the two reciprocating metal rollers 9 and receives a rotational force, thereby causing the oscillating rubber roller 32 to oscillate.

The structure of this oscillating rubber roller 32 is that, in the structure shown in detail in FIG. Instead, it is equivalent to using an elastic roller cylinder having a rubber coating and its reinforcing member, and other swing mechanisms and the like are essentially the same. In this way, the oscillating rubber roller 32 receives rotational force from the reciprocating metal roller 9 and oscillates in the axial direction at a phase in which the rotational speed is reduced.
Also, the thread-like filaments can be randomly distributed. However, this modified form has some disadvantages because the reciprocating full-length roller 9, which is the contact partner, does not directly contact the printing plate 2, but makes another ink split between it and the final forming roller 8. .

[Brief explanation of drawings]

FIG. 1 is a roller arrangement diagram showing an embodiment of an ink roller device of an offset printing press according to the present invention, and the second roller is
A partial sectional view showing the details of the main part of the ink roller device, FIG. 3 is a view taken from the direction of arrow 1 in FIG. 2, and No. 4m is a
Figures 5 to 7, which schematically show patterns of ink splitting between rollers, are enlarged views of samples of ink filaments on the surface of the ink roller.

Claims (1)

[Claims] 1. An offset characterized in that an oscillating metal roller is provided in parallel with the final forming roller that contacts the plate surface and swings in the axial direction in contact with the final forming roller and receives rotational force. Ink roller device of printing press. 2. The device according to claim 1, characterized in that the oscillating metal roller oscillates in the axial direction at a phase in which the rotational speed of the final application roller is reduced. 3. (1) A roller body that is rotatably and swingably supported on a shaft and rotates in contact with the final application roller; (2) A roller body that rotates integrally with this at the end circumference of the roller body. An outer ring, an inner ring loosely fitted to the shaft corresponding to the outer ring, and a large number of bearings interposed between them in an arrangement in which the circumference is equally divided, the position being regulated by the outer ring and the inner ring. (3) A differential means having a member, (3) rotatably and swingably engaged with a shaft inside the roller body, and a large number of teeth provided at one end engage and abut between the bearing members. (4) a swinging cam member whose end face cam portion formed at the other end contacts a cam roller fixed to the shaft; An ink roller device for an offset printing press, comprising: a spring member that constantly presses a member against a cam roller; and an oscillating metal roller. 4. The roller body according to claim 3, wherein the roller body has a hollow cylindrical shape. 5. The device according to claim 3, characterized in that the outer diameter of the roller body is smaller than the outer diameter of the final application roller. 6. The device according to claim 3, characterized in that the bearing member is a ball bearing. 7. The device according to claim 3, characterized in that the bearing member is a roller bearing. 8. An oscillating rubber roller that contacts the final application roller and swings in the axial direction by receiving rotational force from the reciprocating metal roller in parallel with the reciprocating metal roller that is reciprocated in the axial direction by the driving means. An ink roller device for an offset printing press, characterized by the following: 9. The device according to claim 8, characterized in that the oscillating rubber roller oscillates in the axial direction at a phase in which the rotational speed of the reciprocating metal roller is reduced.