JP2563171B2 - Ink device for rotary printing press - Google Patents

Description

TECHNICAL FIELD The present invention relates to an inking device for supplying ink to a plate surface on a plate cylinder in a rotary printing press.

[Conventional technology]

An inking device provided in a rotary printing machine such as an offset printing machine is provided with an ink fountain and a large number of roller groups, and the ink stored in the ink fountain is pulled up by the rotation of the ink fountain roller. The ink film adheres to the surface as an ink film, the ink film is transferred between the roller groups and is evenly kneaded in each direction and then kneaded, and then supplied to the plate surface on the plate cylinder by a deposition roller.

In such an inking device, the contact pressure between the depositing roller and the plate surface, so-called nip pressure, fluctuates due to thermal expansion of the roller, change in diameter due to wear, cylinder tailoring of the plate cylinder, and the like. Since it has a great influence on the quality of the ink, a nap pressure adjusting device is attached to the inking device to adjust the nap pressure during the preparatory stage of printing or during printing.
In addition, start printing work on a plurality of receiving rollers,
A so-called roller lifting device is provided that is simultaneously attached to and detached from the printing plate at the time of interruption.

Conventionally, such a nip pressure adjusting device and a roller raising device have been proposed by, for example, the applicant of the present invention and disclosed in Japanese Patent Laid-Open No. 58-1756.
The thing etc. which are disclosed by the 63 gazette are known. Of these, the nip pressure adjusting device supports a plurality of receiving rollers on respective swingable roller arms, and applies a rotational force to the roller arms in a direction of pressing the receiving rollers against the plate surface by a spring member. The respective roller arms are individually swung by the cooperation of the screw member provided in the above and the spring member to finely move the receiving roller. Further, the roller lifting device is provided with a swingable arc-shaped roller lifting cam, and the shaft ends of the respective wearing rollers are brought into contact with the roller lifting cam. It is to move the plate cylinder back and forth all at once.

[Problems to be solved by the invention]

However, in such a conventional inking device, since the operating positions of the knip pressure adjusting device are dispersed in several places as described above, the operator must frequently move between the printing units, and the multicolor printing is performed. The machine required a great deal of adjustment time and labor, and it took too much time to perform strict nipple pressure control, which was a great mental burden. Further, since the above roller raising device is added to this, not only the operation becomes more frequent, but also because the roller raising device is driven from another device side, the configuration becomes large-scale, especially, the inking device is used for the printing cylinder. It was almost impossible to configure the model that was moved separately from the group.

[Means for solving problems]

In order to solve such a problem, according to the present invention, a coaxial mounting roller attaching / detaching cam and a plurality of nip pressure adjustments which are rotatably supported on the frame side respectively corresponding to the respective roller arms for the mounting roller. Rollers pivotally attached to each of the roller arms are brought into contact with the cam surface of the corresponding cam, and an operating means for rotating the cam is attached to each of the cams.

[Work]

When adjusting the nip pressure of the depositing roller with respect to the plate surface, when the operator is positioned at one place and sequentially operates a plurality of operating members, each cam rotates to rotate the roller arm and each depositing roller. Moves slightly in the radial direction of the plate cylinder, so the nip pressure is adjusted. When another operating member is operated, another cam rotates to sequentially rotate all the roller arms, and all the receiving rollers advance and retreat in the radial direction of the plate cylinder to be attached to and detached from the plate cylinder.

〔Example〕

FIGS. 1 and 2 show an example in which the inking unit of a rotary printing press according to the present invention is applied to an offset printing press. FIG. 1 is a front view of the vicinity of the receiving roller, and FIG. It is a side view. In these figures, an inking device 2 of which only a part is shown is disposed above the plate cylinder 1 on the peripheral surface of which a printing plate is mounted, and ink is stored in this inking device 2. An ink fountain (not shown), an ink fountain roller that pulls up the ink by rotating in the ink fountain and attaches it as an ink film on the peripheral surface, and a transfer roller that sequentially contacts the downstream side of the ink fountain roller to transfer the ink , A large number of rollers such as a swing roller and a kneading roller. Reference numerals 3 and 4 are a pair of swinging rollers as the final rollers constituting these roller groups, which are close to the plate cylinder 1 and rotatably supported by the left and right frames 5 via bearings 6 and 7, and are not shown. The driving side is driven so as to rotate and reciprocate in the axial direction. A roller arm 8 formed in a dogleg shape is rotatably fitted to the boss portion of the bearing 6 projecting inwardly from the left and right frames so that the axial movement thereof is restricted by a snap ring. The boss 7a of 7 has a roller arm 9 formed in a three-pronged shape.
And an L-shaped roller arm 10 are adjacent to each other and are rotatably fitted to each other with their movement in the axial direction restricted by a snap ring. The bearings formed on the free ends of the left and right roller arms 8, 9 and 10 pivotally support both end shafts of the wearing rollers 11, 12 and 13 whose peripheral surfaces are in contact with the swinging rollers 3 and 4, respectively. The roller arm 8 is given a turning force in a direction for pressing the receiving roller 11 against the plate surface by a compression coil spring 15 which is interposed between the roller arm 8 and the stud 14 on the frame 5 side. Further, the roller arms 9 and 10 are given a turning force in a direction for pressing the mounting rollers 12 and 13 against the plate surface by a compression coil spring 16 stretched between their free ends. On the almost perpendicular bisector of the line connecting the shaft centers of the swing rollers 3 and 4, a kneading roller 17 which is one of the roller groups is mounted on the left and right frames 5 via bearings 18.
The kneading roller 17 and the swinging rollers 3, 4 are supported by
Between the kneading rollers 19 and 2 which also constitute the roller group.
0 is provided on the rollers 3, 4, and 17 with their peripheral surfaces in contact with each other.
The inner protruding bosses 18a of the left and right bearings 18 are provided with three cams 21, 22 and 23 for adjusting the nip pressure and cams for attaching / detaching a roller to be attached and detached as described later.
33 and 32 are fitted adjacent to each other so that they can rotate freely.
Reference numerals 2 and 23 correspond to the roller arms 8, 9 and 10, respectively.
Each roller arm 8,9,9 is attached to the outer peripheral cam surface of each cam 21,22,23.
10 roller rollers 11, 12, 13 Rollers pivotally attached to the opposite free end
24, 25, and 26 are in contact with each other, and the cam surfaces of the cams 21, 22, and 23 are formed as gentle curved surfaces having different phases so as to correspond to the rollers 24, 25, and 26. Also each cam 21,2
Arc-shaped teeth 21a, 22a, 23a are cut on a part of the outer circumference of 2, 23. The teeth 22a and 23a are not shown in FIG. 1 because they overlap the teeth 21a. Reference numerals 27, 28, and 29 are operation shafts with knobs as operation members that are instructed to the operation-side frame 5 so as to be rotatable and non-slidable close to each other. Pinions 30, 31 and 32 that mesh with 21a, 22a and 23a are respectively mounted on the operating shafts 27 and 2.
By rotating 8 and 29, the cams 21, 22 and 23 are rotated, and the contact rollers 11, 12, and 13 are finely moved via the roller arms 8, 9 and 10, and the nip pressure is adjusted. It is configured.

On the outer peripheral cam surface of the cam 33 for attaching / detaching the roller, which is provided coaxially with the cams 21, 22, 23 for adjusting the nip pressure, the rollers 24, 2
The rollers 34, 35, 36 on the same axis as 5, 26 are in contact with each other, and the cam 33
The outer peripheral cam surface of is formed to be a curved surface that is a little steeper than the cam surfaces of the nip pressure adjusting cams 21, 22, and 23. A rod 38 is provided between a lever 37 formed integrally with the cam 33 and an operating member (not shown).
Are connected by the cam, and the cam is operated by operating the operating member.
The rotation of 33 causes the cam surface to act so that all the mounting rollers 11, 12, and 13 are attached to and detached from the plate surface via the roller arms 8, 9, and 10.

The operation of the ink device configured as described above will be described. Prior to the printing operation, the nip pressure of the receiving rollers 11, 12, 13 is adjusted. That is, when the operator is positioned on the side of the operation side frame 5 and sequentially rotates the operation shafts 27, 28, 29, the cams 21, 21, 32a, 23a are meshed with the cam 21, 2
Since the rollers 23, 23 rotate and the rollers 24, 25, 26 slightly move due to the action of the cam surface, the roller arms 8, 9, 10 swing and the roller 1
Nip pressure is adjusted by fine movement of 1, 12, 13 in the radial direction of the plate cylinder 1.

After adjusting the nip pressure in this way, when feeding is started and the printing cylinder is inserted, the rod 38 is automatically or manually operated.
Is moved and the cam 33 is rotated, so that by the action of the cam surface, the contact rollers 11, 12, 13 are pressed against the plate surface all at once with the adjusted nip pressure via the roller arms 8, 9, 10. . As a result, the ink in the ink fountain is transferred between the roller groups from the ink fountain roller to the shaking rollers 3 and 4, and then the receiving roller 11,
Supplied to the printing plate by 12,13.

In addition, in the present embodiment, an example in which the present invention is applied to an offset printing machine is shown, but it can be applied to various rotary printing machines such as an intaglio printing machine and a letterpress printing machine in the same manner.
The same effect is obtained.

〔The invention's effect〕

As is apparent from the above-described invention, according to the present invention, in the inking device of the rotary printing press, a coaxial roller for attaching / detaching the receiving roller which is rotatably supported on the frame side corresponding to each roller arm for the receiving roller. And a plurality of nip pressure adjusting cams are brought into contact with the cam surfaces of the roller arms, and the respective cams are provided with an operating means for rotating the rollers. Since the operating member for adjusting the nipple pressure and the operating member for attaching / detaching the wearing roller can be easily concentrated at one place, the operator can operate these operating members at one place outside the frame. In addition to greatly improving the operability and safety, the attachment / detachment cam of the mounting roller can be configured to be much smaller than the conventional large cam, and the operation space can be reduced to provide the device at a low cost. Kill. Furthermore, the parts around the depositing roller have been eliminated, and the maintenance and inspection of the swinging roller and the depositing roller have become easier, improving workability. In particular, it can be applied to models that can be moved separately from the inking unit. Therefore, the unitization becomes easy.

[Brief description of drawings]

1 and 2 show an embodiment of an inking device for a rotary printing press according to the present invention. FIG. 1 is a front view of the vicinity of a landing roller, and FIG. 2 is a partially cutaway side view of the same. 2 ... Inking device, 3 ... Shaking roller, 5 ... Frame, 8,9,10 ... Roller arm, 11,12,13 ... Wearing roller,
15,16 …… Compression coil spring, 21,22,23 …… Nip pressure adjusting cam, 21a, 22a, 23a …… Tooth, 24,25,26 …… Roller, 27,2
8,29 …… Operating axis, 30,31,32 …… Pinion, 33 …… Cam for attaching / detaching roller, 34,35,36 …… Roller, 37 …… Lever, 38…
… Rod.

Claims (1)

(57) [Claims] 1. A plurality of pairs of roller arms, one pair of which is supported on the left and right frame sides so as to be swingable, and a pair of left and right shafts supported by free ends of the pair of roller arms. In the inking device of a rotary printing machine, the plurality of forming rollers, and a spring member for applying a rotating force to each of the roller arms in a direction for pressing each of the forming rollers against the plate surface on the plate cylinder, A plurality of nip pressure adjusting cams in which rollers, which are rotatably supported on the left and right frame sides corresponding to the roller arms and are pivotally attached to the roller arms, are in contact with the cam surface, and the nip pressure adjusting cams. A plurality of sets of operating means for individually rotating the phases of the adjusting cams, a plurality of rollers for attaching / detaching the attached rollers pivotally attached to the respective roller arms, and freely rotatable coaxially with the nip pressure adjusting cams. Supported by An inking device for a rotary printing press, comprising: an attachment roller attaching / detaching cam in which the attaching roller attaching / detaching roller is in contact with a cam surface, and an operating means for rotating the attachment roller attaching / detaching cam. .