JPH028756Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reciprocating roller drive device that can be applied to rotary printing presses, sheet-fed printing presses, etc.

FIG. 1 is a side view showing an example of the arrangement of rollers in a conventional general inking device of an offset printing press, and FIG. 2 is a front sectional view of the same. In the figure, from ink source roller 1 to ink source roller 1
The ink in the ink reservoir 3 that is supplied to the ink feed roller 2 that swings between the reciprocating roller 5 and the reciprocating roller 5 is supplied to the kneading roller group 4 provided in large numbers through the reciprocating roller 5, where it is well kneaded, and is further kneaded by the other reciprocating rollers. The ink is evenly leveled by an ink roller 5, supplied to a plate wrapped around a plate cylinder 7 by an ink forming roller 6, transferred to a blanket wrapped around a blanket cylinder 8, and printed on paper 9.

The reciprocating roller 5, the plate cylinder 7, the blanket cylinder 8, etc. are supported by bearings 10, 10', and 10' provided on the left and right sides, respectively.
Frame 13,1 by 11,11'12,12'
3', and the ink forming rollers 6 are respectively held by brackets provided on the reciprocating rollers 5. At one end of the reciprocating roller 5, plate cylinder 7, and blanket cylinder 8, gears 14, 15, and 16 are fixed to the respective shafts, and when an electric motor (not shown) is driven, the gears are first connected to the shafts. The gear 16 that has been rotated is driven, then the gear 15 that meshes with this gear 16 is driven, and then the gear 14 that meshes with this gear is driven.

Therefore, from the blanket cylinder 8 to the plate cylinder 7, the plate cylinder 7
The rotation is transmitted from the reciprocating roller 5 to the reciprocating roller 5, and from the reciprocating roller 5 to the ink forming roller 6 (the ink forming roller 6 is rotated by the reciprocating roller 5),
In particular, the reciprocating roller 5 is provided with a grooved cam (not shown), and is oscillated in the axial direction while the roller rotates.

However, the conventional devices shown in FIGS. 1 and 2 have the following drawbacks. That is, the ink is on the plate cylinder 7.
If the plate cylinder 7 moves when the ink is transferred from the ink to the blanket cylinder 8, a double phenomenon appears in the printing on the printing paper surface, and a dark area of ink appears as a so-called shot stitch. The following factors can be considered as reasons for this. That is, the ink forming roller 6 and the mixing roller group 4 are rotated by the reciprocating rollers 5, but since the power is transmitted from the blanket cylinder 8 to the plate cylinder 7 and then to the reciprocating rollers 5 by gear drive, the ink is Calling roller 2 is ink source roller 1
The shock generated when the plate swings between the reciprocating rollers 5 and collides with each roller is transmitted to the gear 15 of the plate cylinder 7 via each gear, and the shock from the transmitted gear is transmitted to the gear 15. This had the disadvantage that it directly affected the plate cylinder 7 through the plate cylinder, causing the plate cylinder to move.

Further, the reciprocating roller 5 is driven by a gear 15 attached to the shaft end of the plate cylinder 7, while the ink forming roller 6 is rotating in contact with the plate cylinder 7 and the reciprocating roller 5. However, depending on the type of printed matter, the diameter of the plate cylinder 7 may be adjusted using a thin sheet or the like.
In such a case, a difference in circumferential speed occurs between the plate cylinder 7 and the reciprocating roller 5, and the plate cylinder 7 is moved by the gear 15 to the reciprocating roller 5.
If the reciprocating roller 5 is rotating in the plate cylinder body,
There was a problem that the plate cylinder 7 itself wobbled.

The present invention was proposed in order to solve the above-mentioned conventional drawbacks, and in addition to fixing gears to the shaft ends of the blanket cylinder, plate cylinder, and reciprocating roller, the present invention also uses an ink feed roller that oscillates from the ink source roller. In a printing machine that supplies ink to a plate cylinder through a reciprocating roller, a group of kneading rollers, an inked roller, etc., a roller with the same diameter is mounted on the gear fixed to the shaft end of the plate cylinder in parallel with the gear. A large-diameter gear fixed to the shaft end of the blanket cylinder is held in a rotatable manner, and a large-diameter gear fixed to the shaft end of the blanket cylinder is meshed with the two gears, and the plate cylinder is rotatably held on the gear fixed to the shaft end of the plate cylinder. The gear held at the shaft end of the reciprocating roller meshes with the intermediate gear which meshes with the gear fixed to the shaft end of the reciprocating roller, thereby eliminating the factors that cause doubling and scratches on the printing paper and improving the printing quality. It is an object of the present invention to provide a reciprocating roller drive device which can be improved and has effects such as being very advantageous in terms of cost and space.

The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 3 is a sectional view of a reciprocating roller drive device showing an embodiment of the present invention. In the figure, reciprocating roller 1
7 is supported by frames 19, 19' by bearings 18, 18' provided on the left and right, and these bearings 18,
The inking roller 20 is rotatably supported by a bracket attached to the roller 18'. Further, the reciprocating roller 17 is provided with a grooved cam (not shown) so that the roller can swing in the axial direction while rotating, and a gear 21 is screwed to one end of the reciprocating roller 17. .

22 is a plate cylinder, and bearings 23, 2 are provided on the left and right sides.
3' is supported by frames 19, 19', and a gear 26 is keyed on a shaft that protrudes outward from the bearing 23 of the plate cylinder 22. Possibly, the gear 26
Gears 24 having the same diameter are held in parallel. An end plate 27 bolted to the shaft of the plate cylinder 22 is in contact with the outer surfaces of the gears 26 and 24.
The end plate 27 prevents the gear 24 from slipping out from above the gear 26 to the outside. Further, 28 is an intermediate gear that meshes with the gear 24, and the intermediate gear 28 is rotatably pinned to a bracket attached to the frame, and the gear 21 and the gear 24 are rotatably pinned.
The rotation from the gear 24 is transmitted to the gear 21 by meshing with both of the gears.

A blanket body 29 is supported by the frames 19, 19' by bearings 30, 30' provided on the left and right sides, and a large diameter gear 31 is keyed to one end of the blanket body, and the gear 31 is connected to the shaft by an end plate 32. It is held in such a way that it does not come off. Further, the large diameter gear 31 meshes with the two gears 24 and 26. Furthermore, the reciprocating roller 17 is an ink forming roller 20.
The ink forming roller 20 is connected to the plate cylinder 22 and the plate cylinder 22.
and the blanket cylinder 29 are adapted to rotate in contact with each other.

Next, the action will be explained. When an electric motor (not shown) rotates, the blanket cylinder 29 is driven, power is simultaneously transmitted from the gear 31 to the gear 26 and the gear 24, and the plate cylinder 22 fixed to the gear 26 contacts the blanket cylinder 29 and rotates. . Also gear 24
The power transmitted to the gear 2 is transmitted to the gear 2 via the intermediate gear 28.
1, and the reciprocating roller 17 is driven. The ink forming roller 20 is rotated by the reciprocating roller 17, and the ink of a large number of kneading roller groups is supplied from the reciprocating roller 17 to the ink forming roller 20, from the ink forming roller 20 to the plate cylinder 22, and then
2 to the blanket cylinder 29.

The present invention is constructed as explained in detail above, and since the reciprocating roller is driven from the blanket cylinder bypassing the plate cylinder, the ink feed roller collides with the reciprocating roller, causing the ink to flow through the drive gear. The shot, etc. that is transmitted is not transmitted to the plate cylinder. That is, since the gear at the end of the blanket cylinder shaft has a large diameter, the shock transmitted thereto via the gear of the reciprocating roller is absorbed. For this reason, rotation is transmitted from the gear at the end of the blanket cylinder shaft to the plate cylinder via the gear at the end of the plate cylinder shaft, but since the shock is absorbed, this shock is transmitted to the plate cylinder. This is not the case, and since the drive from the gear of the reciprocating roller is not transmitted to the gear at the end of the plate cylinder shaft, the above-mentioned shock is not transmitted to the plate cylinder via the gear.
Therefore, the wobbling of the plate cylinder is eliminated, and there is no possibility of double printing, and the printing quality is improved.

In addition, in order to drive the gear at the end of the reciprocating roller shaft by the gear at the end of the blanket cylinder shaft, many gears and space are normally required, but in the case of the present invention, the structure is simple, and this reduces cost and space. But it is very advantageous.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional inking device of an offset printing press, FIG. 2 is a front sectional view of the inking device, and FIG. 3 is a front sectional view of the device showing an embodiment of the present invention. Explanation of the main parts of the figure, 17... Reciprocating roller, 2
0... Ink forming roller, 21... Gear, 22...
Plate cylinder, 24...Gear, 25...Bearing, 26
... Gear, 28 ... Intermediate gear, 29 ... Blanket body, 31 ... Large diameter gear.

Claims (1)

[Scope of utility model registration request] Gears are fixed to the shaft ends of the blanket cylinder, plate cylinder, and reciprocating roller, respectively, and the reciprocating roller, kneading roller group, ink roller, etc., to which ink is supplied from the ink source roller through the ink feed roller that swings, are installed. In a printing press that supplies ink to a plate cylinder through Large-diameter gears fixed to the shaft end of the cylinder are engaged with each other, and the gear is rotatably held on the gear fixed to the shaft end of the plate cylinder, and the gear is fixed to the shaft end of the reciprocating roller. A reciprocating roller drive device characterized in that the gear meshes with an intermediate gear that also meshes with the gear.