JPH0719791Y2 - Rotary press - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary press for printing on a web material, and more particularly to a rotary press capable of offset full-color multicolor printing on one side of the web and offset monochromatic printing on the other side.

[0002]

2. Description of the Related Art A conventional rotary press capable of full-color printing on one side of a web material and single-color printing on the other side is, for example, "new edition for newspaper printing".
(Published by The Japan Shimbun Association on October 31, 1980) Page 277 Satellite type offset multicolor printing means as shown in FIGS. 40A and 40B is combined with BB offset printing means. Thing, or ibid, page 279, fourth
There is a combination of the offset printing means with a common impression cylinder type half deck as shown in FIG. 3A and the BB type offset printing means.

A rotary press of such a type is shown in FIG.
As shown in (showing the outline of FIG. 40A), a web material paper feeding means for supplying a web material paper to each printing means is provided at the lowest position, and each printing means is stacked on it. Further, it is not uncommon for other printing means to be stacked on the BB type offset printing means.

Further, the web material reaches the contact portion between the common impression cylinder and the blanket cylinder of the other printing means from the web paper feeding means through the contact portions of the two blanket cylinders of the BB offset printing means. The paper is threaded and printed according to the paper path.

[0005]

Therefore, in the rotary press according to the above-mentioned conventional technique, the height of the rotary press becomes high, and the building in which the rotary press is installed must have a height commensurate with the height of the rotary press. At appropriate heights, it is necessary to prepare a paper supply, plate attachment / detachment, ink adjustment, paper threading, or a floor or a stairway connecting floors to be used as a scaffold for maintenance and inspection of each part of the rotary press. . Therefore, in the rotary press according to the above-mentioned conventional technique, the equipment cost including the installation building is high, and the workability is poor due to the multi-stage work floor surface. There is a drawback that the image lines of the monochromatic printing surface which is printed by the printing means and contacts the impression cylinder peripheral surface of other printing means may overlap while passing through the impression cylinder peripheral surface.

An object of the present invention is to provide a rotary press capable of one-sided full-color multicolor printing and other-sided single-color printing without such drawbacks.

[0007]

According to the rotary press of the present invention, there are provided at least three plate cylinders each having a blanket cylinder capable of coming into contact with and separating from a common impression cylinder, and first printing means provided around the common impression cylinder. , A second printing means provided with two plate cylinders each having a blanket cylinder that can be brought into contact with and separated from each other, and a web paper feeding means at an intermediate position between the first printing means and the second printing means on the same floor surface The web material paper, which is juxtaposed and is pulled out from the web material paper winding body mounted and supported by the web material paper feeding means, passes through the common impression cylinder of the first printing means and the abutting portions of the blanket cylinders. A paper threading path is formed so as to reach the contact portion between the two blanket cylinders of the two printing means.

[0008]

In the above rotary press, the web material paper drawn out to the web material paper winding member of the web material paper feeding means is
The paper is threaded through the printing means and then through the second printing means. When the rotary press is operated in this state, the web material is printed on one side by sequentially passing through the contact portions of the common impression cylinder of the first printing unit and each blanket cylinder. The web material then passes through the abutting portions of the two blanket cylinders of the second printing means, and is printed on both sides thereof, that is, one side and the other side, and the printing is completed.

In the above printing through the paper passing path, since the double-sided printing of the web material paper by the second printing means is performed after the single-sided printing by the first printing means, the web contacting the common impression cylinder of the first printing means is performed. Since the surface of the raw paper is in a state before printing, so-called dull does not occur in the common impression cylinder.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary press according to an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the rotary press has three plate cylinders P each having a blanket cylinder B that can be brought into contact with and separated from the common impression cylinder I. Two plate cylinders P each having a possible blanket cylinder B are provided in a vertical relationship, and a second printing unit 2 and a facing frame F (only one of which is shown) are shared with the second printing unit 2. A web paper feed means 3 is provided. The blanket cylinders B of the first printing unit 1 and the second printing unit 2 and the plate cylinder P can be brought into and out of contact with each other.

The first printing means 1 and the second printing means 2 are arranged side by side on the same floor surface FL with the web material paper feeding means 3 positioned at an intermediate position.

Therefore, the height of the installation space of the rotary press is the first.
Since the height of the higher one of the printing means 1 and the second printing means 2 is not exceeded, the equipment cost including the installation building is reduced.
Further, the operator can monitor the three persons at a glance, and since the preparation of feeding, plate attachment / detachment, ink adjustment, paper threading, and maintenance / inspection of each part can be performed on the same floor as a scaffolding, The work load is reduced and workability is good.

The web material paper W drawn from the web material paper roll R mounted and supported on the web material paper feeding means 3 is in contact with the common impression cylinder I of the first printing means 1 and each blanket cylinder B. 2 of the second printing means 2 via N1, N2 and N3
A paper threading path 4 reaching the abutting portion N4 of one blanket cylinder B is constituted by guide rollers G, G ... The folding means 5 for cutting and folding the web material paper W printed by the second printing means 2 is juxtaposed with the first printing means 1 and the second printing means 2 at appropriate positions on the floor surface FL. .

The operation and action of the above rotary press will be described. Web material paper roll R of the web material paper feeding means 3
The web material paper W pulled out from the paper is threaded along the paper threading path 4, further passes through the contact portions N4 of the two blanket cylinders B of the second printing means 2, and is then threaded by the folding means 5.

When the rotary press is operated in this state, the web material paper W passes through the common impression cylinder I of the first printing means 1 and the contact portions N1, N2 and N3 of the blanket cylinders B one by one, and the three primary colors, That is, printing with three colors of cyan, magenta, and yellow is performed on one surface. The web material W that has passed through the contact portion N3
Then passes through the contact portions N4 of the two blanket cylinders B of the second printing means 2 and is subjected to monochromatic printing (generally, both sides are inked) on both sides thereof, that is, one side and the other side, and the printing is completed. To do.

In the above-described paper threading along the paper threading path 4, since the double sided printing of the web material W by the second printing means 2 is performed after the single sided printing by the first printing means 1, the common impression cylinder is used. The surface of the web material W that contacts I is in a state before printing. Therefore, so-called double-dip does not occur in the common impression cylinder I in the first printing unit 1. After the above-mentioned printing is completed, the web material W is cut and folded by the folding device 5.

[0017]

In the rotary press capable of performing full-color offset printing on one side of the web material and monochromatic offset printing on the other side, the rotary press of the present invention reduces the height of the installation space. In addition to reducing the equipment cost, the operator can monitor the printing means and the paper feeding means that are lined up at a glance, and perform various operations related to the printing means and the paper feeding means on the same floor as a scaffold. Since it can be carried out in a simple manner, the work load on the operator is reduced and workability is improved.

Furthermore, since the one-sided printing by the first printing means by the common impression cylinder is performed prior to the double-sided printing of the web material W by the second printing means, so-called dubbing is caused on the surface of the web material paper which comes into contact with the common impression cylinder. Does not occur.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a rotary press according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a rotary press in the related art.

[Explanation of symbols]

 1 1st printing means 2 2nd printing means 3 web material paper feeding means 4 paper feed path 5 folding means I common impression cylinder B blanket cylinder P plate cylinder F facing frame FL floor surface W web material paper N1, N2, N3, N4 Contact part G guide roller

Claims (1)

[Scope of utility model registration request] 1. A first printing means having at least three plate cylinders, each of which has a blanket cylinder which can be brought into contact with and separated from a common impression cylinder, is provided around the common impression cylinder, and a blanket cylinder which can be brought into contact with and separated from each other. The second printing means provided with two plate cylinders and the web material paper feeding means at an intermediate position between the first printing means and the second printing means are arranged side by side on the same floor, and the web material paper feeding means is provided. The web material paper pulled out from the web material paper winding body mounted and supported on the second printing means 2 passes through the common impression cylinder of the first printing means and the contact portion of each blanket cylinder to the second printing means 2.
A rotary press with a paper threading path that extends to the contact area of two blanket cylinders.