JPH01280559A - Inking and damping device for small-sized rotary offset printer - Google Patents

Abstract

PURPOSE: To reduce production cost and maintenance cost and to enable high grade and high speed printing by allowing a damping intermediate roller to approach a lateral shaking roller pair of the final stage of an ink surface smoothing apparatus, and enabling the contact and separation of the lateral shaking roller pair of the final stage and the damping intermediate roller so as to carry out uniform inking. CONSTITUTION: An ink surface smoothing apparatus consisting of lateral shaking roller pairs 11, 11 and a large number of mirror surface rollers 16 and coming into contact with an inking roller 5 in the rear stage of an ink lateral shaking roller 4 along the rotary direction of an inking roller 5 to reciprocally move in an axial direction and a damping apparatus consisting of the regulating roller 13 coming into contact with a damping tank roller 12 to rotate and the axially reciprocating damping intermediate roller 15 rotationally coming into contact with the damping roller 14 rotating in contact with the damping tank roller 12 and a plate cylinder 6 to reciprocally move in an axial direction are provided and the damping intermediate roller 15 approaches the lateral shaking roller pairs 11, 11' of the final stage of the ink surface smoothing apparatus to enable the contact and separation between the lateral shaking roller pairs 11, 11' and the damping intermediate roller 15.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an inking and dampening device for small rotary offset printing presses.

[Conventional technology]

In the case of current common inking devices, the technical literature details that the greater the number of inking rollers, the better the quality of the print.

For this reason, in the case of printing apparatuses that require high-quality printing, a large number of inking rollers have hitherto always been arranged on the plate cylinder.

In conventional inking machines, the inking roller must directly smooth the ink surface on the plate cylinder. Normally, each inking roller rotates on the plate cylinder many times during one printing process, and a new inked surface is formed on each inking roller each time it comes into contact with the plate cylinder. is not smooth enough before the next rolling contact, that is, the next contact between the inking roller and the plate cylinder, so that a uniform layer of ink is not formed on the plate cylinder before the next contact. become.

Therefore, in order to compensate for the above-mentioned disadvantages of inking the plate cylinder, ie to make the ink surface on the plate cylinder smooth, it is necessary to increase the number of inking rollers.

In this case, the so-called front-heavy inking device (i.e., the type that distributes more ink to the front roller) is better than the so-called heavy-weight inking device (i.e., the type that distributes more ink to the rear roller). It should be noted that the device is better. In the case of previous heavy inking devices, most of the inking liquid is delivered to the inking rollers that first come into contact with the rotating printing plate, and the following inking rollers smooth the ink on the printing plate. In other words, these inking rollers add ink to the printing plate where the ink layer is thin, while removing ink from areas where the ink layer is excessive, thereby achieving an ink layer of uniform thickness. In the case of later heavy inking devices, it is difficult for the last group of inking rollers to completely smooth the inking surface.

This is because most of the ink liquid is sent to the downstream roller group, and immediately thereafter contact between the inking roller and the printing form takes place.

From the above, it is clear that high quality printing can be achieved by using multiple inking rollers. However, this method has the disadvantage that the printing press is expensive. This is because the provision of a large number of additional rollers inevitably increases assembly and manufacturing costs. Furthermore, a printing press with a large number of additional rollers is extremely difficult to handle, which results in printing presses of this type having extremely high maintenance costs.

Such an inking and dampening device is known from DE 2255714, in which the inking and dampening device operates on a common oscillating roller acting on an inking roller; The roller additionally acts on the inking roller. However, this simple inking and dampening device is not always satisfactory for achieving high quality printing standards.

A similar inking and dampening device (though, of course, without the separate oscillating roller) is GB-PS693183.
has also been disclosed.

Against this level of technology, the previous German patent application P2
The invention of No. 724,746 matches the quality level of large rotary offset printing presses with many inking colas, and thereby maintains the ease of handling and low cost of small rotary offset printing presses. It is intended to create an inking and dampening device for small rotary off-cent printing presses that can be

Following the teachings of the earlier patent applications mentioned above, this is achieved by two different embodiments. In one embodiment, the inking and dampening device acts in each case on a transverse roller arranged on the inking roller, with the inking surface smoothing system acting between the aforementioned transverse rollers. It is adapted to act against the inking roller. This system is designed to have a relatively large number (from three to six) of transverse roller pairs.

In a further embodiment, the dampening device is designed to act directly on the form cylinder, rather than on the aforementioned rollers which adjoin the inking rollers.

That is, an inking roller that supplies ink is provided upstream of the plate cylinder along the rotational direction of the only inking roller of the inking device (alcohol dampening device). In this case, at least a pair of oscillating rollers are provided in contact with an inking roller that supplies ink.

Some features of the inking and dampening device according to the present application are themselves already partially known in other patents (e.g. US-PS1968850 and DIE-AS22
22581), the technology disclosed by the earlier application has been significantly improved and developed in the intended direction.

That is, in a first embodiment of the inking and dampening device according to the earlier application, the inking roller contacts the oscillating roller in turn.

The oscillating roller delivers the ink and additionally transfers a film of moisture onto the inking roller.

Also, in a second embodiment, the dampening device is separated from the inking device, and the inking roller only transfers ink to the plate surface on the plate cylinder. The present invention is based on this second embodiment. The last roller of the dampening device acts directly on the form cylinder as a dampening roller and additionally acts on an ink surface smoothing roller arranged upstream of the inking roller.

Compared to the second embodiment according to the earlier application, the first embodiment is simpler in construction, but the latter has the advantage of achieving a higher performance as a printing machine. This is because, at a slightly higher cost in parts, greater tolerances for ink/water balance can be achieved during high speed printing. Moreover, separating the dampening device from the inking device is good in itself. This is because this method causes the least emulsification of the ink.

[Problem to be solved by the invention]

Thus, the second embodiment of the aforementioned earlier application can be implemented without sacrificing the advantages realized by the prior invention (high quality printing, low cost construction, ease of handling and low maintenance costs). It has been a conventional technical challenge to further develop the advantages that it has, that is, high-speed, high-quality printing.

The purpose of the present invention is to solve such technical problems, and this is accomplished by the first claim of the present specification.
This is accomplished by the inking and dampening equipment described in Section 1.

[Means to solve the problem]

That is, the above object is an inking and dampening device for a small-sized rotary offset printing machine, comprising an ink tank roller, an ink lever roller, an intermediate roller and an ink oscillating roller, the ink oscillating roller an inking device configured to contact an inking roller rotating in contact with the cylinder and reciprocate in its axial direction; a plurality of oscillating roller pairs, or at least one oscillating roller pair and a large number of mirror surfaces; Consisting of a roller and
an ink surface smoothing device arranged to be in contact with the inking roller at a stage subsequent to the ink oscillating roller along the rotational direction of the inking roller, and configured to reciprocate in the axial direction; a dampening tank roller, an adjustment roller that rotates in contact with the dampening tank roller, a dampening roller that rotates in contact with the dampening tank roller and the plate cylinder, and a dampening intermediate that rotates in contact with the dampening roller and moves back and forth in the axial direction thereof. The intermediate dampening roller is disposed close to the last pair of oscillating rollers of the ink surface smoothing device, and is in contact with the last pair of oscillating rollers. This can be achieved by the inking and dampening device for a compact rotary offset printing press as described above, characterized in that the intermediate rollers are configured so that they can come into contact and separate.

It is recommended that a large number of mirror rollers be provided on the side surface of the dampening roller opposite to the side that contacts the plate cylinder to rotate in contact with the dampening roller.

Also, during the cleaning and inking process, the upper roller of the last pair of oscillating rollers along the direction of rotation of the inking roller is rotated over the axis of the other oscillating roller that is rotating above the inking roller. It is recommended that the roller be constructed so that it can rotate around the dampening intermediate roller, come into contact with it, and be separated from it.

It is also recommended that the inking roller and the dampening roller be made of the same material, have the same shape, and be supported by bearings of the same specification.

It is also recommended that the ink oscillation roller and the intermediate dampening roller have exactly the same size and the same transmission, and are supported by bearings of the same specification.

Furthermore, a plurality of pairs of oscillating rollers or at least one
Two pairs of oscillating rollers and a number of mirror rollers are mounted on a common oscillating table, and the oscillating table is configured to reciprocate in the same direction as the dampening intermediate roller and in the opposite direction to the ink oscillating roller. It is recommended that you configure

[For production]

With the above configuration, it is possible to apply ink uniformly to the plate cylinder using one inking roller, and the manufacturing and maintenance costs are low, and the compact rotary offset printing machine is capable of high-quality, high-speed printing. An inking and dampening device is provided.

〔Example〕

Hereinafter, the configuration of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the mutual arrangement of rollers of an inking and dampening device according to the present invention, and FIG. 2 is an explanatory diagram showing another embodiment.

In the figure, 1 is an ink tank roller, 2 is an ink lever roller,
3 is an intermediate roller, 4 is an ink transverse roller, 5 is an inking roller, 6 is a plate cylinder, 7.7° to 11.11°
12 is a pair of horizontal swinging rollers, 12 is a dampening tank roller, 13 is an adjustment roller, 14 is a dampening roller, 15 is a dampening intermediate roller, 16
and 20 are mirror rollers.

FIG. 1 shows a new inking and dampening device according to the present invention. In the offset printing press shown in this figure, the problem at hand is the plate cylinder 6 and its inking and dampening device. Since this is a pressurizing device, the rubber cylinder and impression cylinder are omitted in the figure.

Another embodiment of the inking and dampening device according to the invention is shown in FIG. 11.11' is left, and the remaining oscillating rollers 7.7' to 10.10'' in FIG. Since several mirror rollers 20 are arranged, it is no longer important to adjust the dampening water for different printing tasks, which makes this printing device even more outstanding. This means that even if the operating conditions change, the machine can be operated with only one "universal" dampening water adjustment (water excess) method. Constant adjustment of water is no longer necessary.

As is well known in the past, the ink tank roller 1 and the ink lever roller 2 move in correspondence with each other, and the ink lever roller 2 makes a pendulum movement and approaches and separates from the ink tank roller l. By doing so, ink is intermittently transferred from the ink tank roller l.

The ink transferred to the ink lever roller 2 is further transferred to the intermediate roller 3. From this intermediate roller 3, the ink is transferred to a horizontal inking roller 4 of the inking device.

As is well known, this horizontal ink digging roller 4 is adapted to reciprocate in its axial direction as it rotates.

Considering the direction of rotation of the inking roller 5, the horizontal inking roller 4 is provided immediately after the plate cylinder 6.

These ink tank roller 1, ink lever roller 2,
The intermediate roller 3 and the horizontal ink digging roller 4 constitute an inking device.

In the first embodiment (see FIG. 1), in the first embodiment (see FIG. 1), a large number of pairs of horizontally oscillating rollers 7° to 11, are arranged downstream of the ink horizontally digging roller 4 along the rotational direction of the inking roller 5. 11
” are arranged in contact with the inking roller 5. These pairs of transverse rollers are arranged on one common transverse table, and this table has one unified plate for all pairs of transverse rollers. It is designed to give a horizontal swing motion.

In the second embodiment shown in FIG. 2, the four pairs of horizontal digging rollers 7.7' to 10,10' at the front stage are replaced by a larger number of mirror rollers 16.

The last pair of oscillating rollers 11, 11'' is left in place because it is necessary to achieve interlocking operation with the dampening device during cleaning and inking.

The transverse roller pairs 7.7' to 11,11' (FIG. 1) or the transverse roller pair ILII' and the mirror roller 16 (FIG. 2) constitute an ink surface smoothing device.

Next, on the opposite side of the inking roller 5 from the horizontal inking roller 4, an intermediate dampening roller 15 of the dampening device is placed between the horizontal ink opening and the ILII without contacting the inking roller 5. It is located near '.

Although the surface of each roller of the dampening device is similarly covered with ink, its primary function is to draw water up through the dampening trough roller 12.

That is, the dampening water device consisting of a plurality of rollers 12 to 15 takes out water from the water tank through the dampening tank roller 12, and
Transfer to the dampening roller 14. At that time, the dampening tank roller 12
The amount of water to be removed is determined by an adjusting roller 13 rotating in contact with the water.

The dampening roller 14 is adapted to rotate in contact with the plate cylinder 6 at a position immediately before the inking roller 5 in the direction of rotation of the plate cylinder 6, and the intermediate dampening roller 15 is adapted to rotate during the normal printing process. The dampening roller 14 is adapted to act only on the dampening roller 14. As is clear from the figure, the intermediate dampening roller 15 is always kept at a small distance from the inking roller 5, but at the same time it is arranged very close to the pair of transverse rollers 11, 11', and at the beginning of printing. During the washing and inking steps which take place at the end of the process, a connection between the inking device consisting of rollers 1 to 4 and the dampening device consisting of rollers 12 to 15 is made to take place. That is, the horizontal shaking roller 11° rotates around the axis of the horizontal shaking roller 11 to a position where it contacts the dampening intermediate roller 15, and the horizontal shaking roller 11 and the dampening intermediate roller 15 are connected via the horizontal shaking roller 11°. is now being carried out. By performing this bonding at the beginning of printing, ink is also fed into the dampening device, and by performing this bonding at the end of printing, all rollers involved in printing are cleaned. It is.

In the embodiment shown in FIG.
0 is arranged so as to be in contact with the dampening roller 14. This mirror roller 20 can smooth out slight ink irregularities that may occur due to the "universal" dampening water adjustment.

The inking roller 5 and the dampening roller 14 are made of the same material in both the embodiments of FIGS. 1 and 2, and their construction is known. Both rollers and bearings are supported by bearings with the same specifications, making both rollers and bearings compatible.

The same applies to the ink transverse roller 4 and the dampening intermediate roller 15, which have exactly the same dimensions and the same specification of drive and bearings, and which rotate in opposite directions to each other. This is of great significance for printing press users in terms of convenience in parts replacement and inventory management.

In the first embodiment, five pairs of transverse rollers 7, 7' to 11, 11' are used in the system of an inking device, which are mounted on one common transverse table with bearings of the same specification. installed. This oscillating alloy body provides a common reciprocating frictional motion to all the oscillating rollers along their axial direction, and this axial reciprocating frictional motion is performed in the opposite direction to the axial reciprocating motion of the ink oscillating roller 4. It is now possible to On the other hand, the friction movement of the oscillating table is designed to take place synchronously with the intermediate dampening roller 15, which is essential for the connection of the two during cleaning and inking. In order to evenly distribute the ink layer on the inking roller 5 in the axial direction, the transverse table is driven taking into account the frictional movement of the dampening intermediate roller 15.

The driving force for rotation is generated by the friction between the rollers, so
This drive, of course, involves only frictional movements.

The same driving as described above is also performed for the pair of lateral swinging rollers 11, 11° and the mirror roller 16 in the second embodiment.

Similar to the five pairs of lateral oscillating rollers, the surfaces of the dampening tank roller 12, ink lateral oscillating roller 4, and intermediate dampening roller 15 are
Covered with hard rubber or similar hard synthetic material
There is.

The inking roller 5 is driven directly by the plate cylinder using gears, and vibrations are suppressed by an auxiliary friction drive of the inking roller 4.

The inking roller 5, the dampening roller 14 and the plate cylinder 6 are
They are connected to each other via gears provided at their ends and are driven.

〔Effect of the invention〕

Since the present invention is constructed as described above, when the present invention is used, it is possible to apply ink uniformly to the plate cylinder with one inking row, and the manufacturing and maintenance costs are low, and the quality is high. It is possible to provide an inking and dampening device for a compact rotary offset printing press capable of high speed printing.

It should be noted that the present invention is not limited to the above-mentioned embodiments,
It is intended to cover within its scope all modifications that can be readily deduced by those skilled in the art from the above description.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the mutual arrangement of rollers of an inking and dampening device according to the present invention, and FIG. 2 is an explanatory diagram showing another embodiment.

Claims (1)

[Claims] 1) An inking and dampening device for a small-sized rotary offset printing machine, comprising: an ink tank roller (1), an ink lever roller (2), an intermediate roller (3) and an ink oscillation roller ( 4), wherein the ink oscillating roller (4) is configured to contact an inking roller (5) that rotates in contact with the plate cylinder (6) and to reciprocate in the axial direction thereof. and; a plurality of horizontal swing roller pairs (7, 7' to 11, 11'), or at least one horizontal swing roller pair (11, 11')
and a large number of mirror-surfaced rollers (16), and the inking roller (5) is located downstream of the ink oscillation roller (4) along the rotational direction of the inking roller (5).
) and configured to reciprocate in the axial direction thereof; a dampening tank roller (12); and an adjustment roller (13) rotating in contact with the dampening tank roller (12);
), the dampening tank roller (12) and the plate cylinder (6).
a dampening device comprising a dampening roller (14) that rotates in contact with the dampening roller (14), and an intermediate dampening roller (15) that rotates in contact with the dampening roller (14) and reciprocates in the axial direction; The intermediate roller (15) is disposed close to the last stage horizontal oscillating roller pair (11, 11') of the ink surface smoothing device, and is located close to the last stage horizontal oscillating roller pair (11, 11').
11, 11') and the intermediate dampening roller (15) are configured to be able to come into contact with and separate from each other. 2) A plurality of mirror rollers (20) which rotate in contact with the dampening roller (14) are provided on the side surface of the dampening roller (14) opposite to the side that contacts the plate cylinder (6). Inking and dampening equipment. 3) During the cleaning and inking process, the inking roller (5
) along the rotational direction of the last stage horizontal swinging roller pair (11,
The upper roller (11') of the other oscillating roller (11') rotating on top of the inking roller
The inking and dampening device according to claim 1 or 2, wherein the inking and dampening device is configured to be able to pivot toward the intermediate dampening roller (15), come into contact with it, and be able to separate from it. . 4) Inking roller (5) and dampening roller (14)
4. The inking and dampening device according to claim 1, wherein the inking and dampening devices are made of the same material, have the same shape, and are supported by bearings of the same specification. 5) Ink horizontal swing roller (4) and dampening intermediate roller (
15) The inking and dampening device according to any one of claims 1 to 4, wherein the inking and dampening devices (15) have exactly the same size and transmission and are supported by bearings of the same specification. 6) Multiple pairs of horizontal swinging rollers (7, 7' to 11, 11')
, or at least one pair of horizontal swinging rollers (11, 11
') and a number of mirror rollers (16) are attached to one common oscillation table, which oscillation table is connected to the dampening intermediate roller (16).
6. The inking and dampening device according to claim 1, wherein the inking and dampening device performs a reciprocating motion in the same direction as the ink oscillating roller (4) and in the opposite direction to the ink oscillating roller (4).