JPH08118590A - Offset rotary press - Google Patents

Abstract

PURPOSE: To provide an offset rotary press capable of facilitating the operation of contacting and separating each blanket cylinder, form cylinder, inking device. and dampening water device against each corresponding press cylinder, blanket cylinder, and form cylinder, and also capable of rapidly replacing the blanket or form plate without requirement of relatively much time in the replacing work of the blanket or form plate. CONSTITUTION: The offset rotary press 14a has a press cylinder 30, blanket cylinder 32, form cylinder 34, inking device 36 and a dampening water device 38. The blanket cylinder, form cylinder, inking device and dampening device are arranged beneath the press cylinder. The blanket cylinder can be selectively brought in contact and separation with respect to the press cylinder. and the form cylinder can be selectively in contact and separation with respect to the blanket cylinder, and the inking device and dampening device can also be selective brought in contact and separation with respect to the form cylinder.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an offset rotary press.

[0002]

2. Description of the Related Art An offset rotary press comprises an impression cylinder, a blanket cylinder, a plate cylinder, an inking device, a dampening water device,
A blanket cylinder, a plate cylinder, an inking device, and a dampening water device are arranged above the impression cylinder.

The blanket cylinder is selectively attachable to and detachable from the impression cylinder for replacement of the blanket, and the plate cylinder is selectively attachable to and detachable from the blanket cylinder for replacement of the plate cylinder. The inking device and the dampening water device can be selectively brought into and out of contact with the plate cylinder for replacing the plate cylinder.

[0004]

The offset rotary press is large in size, and each of the impression cylinder, the blanket cylinder, the plate cylinder, the inking device, and the dampening water device also has a large weight. The blanket cylinder above the impression cylinder, the plate cylinder, the inking device, and the dampening water device, respectively
The work of bringing the blanket cylinder and the plate cylinder into contact with and separating from each other is difficult, and the moving distance for contacting and separating the blanket cylinder, the plate cylinder, the inking device, and the dampening water device is small. For this reason, it took a relatively long time to replace the blanket or plate, and the blanket or plate could not be replaced quickly.

The present invention has been made under the above circumstances, and an object of the present invention is to provide a blanket cylinder, a plate cylinder, an inking device,
Also, it is possible to facilitate the work of bringing each of the fountain solution devices into and out of contact with the corresponding impression cylinder, blanket cylinder, and plate cylinder, and it takes a relatively long time to replace the blanket and plate. It is an object to provide an offset rotary press that allows quick replacement of blankets and plates without having to do so.

[0006]

In order to achieve the above-mentioned objects of the invention, an offset rotary press according to the invention comprises: an impression cylinder, a blanket cylinder, a plate cylinder, an inking device and a dampening machine. A blanket cylinder, a plate cylinder, an inking device, and a dampening water device are arranged below the impression cylinder; the blanket cylinder selectively contacts the impression cylinder. Releasable; plate cylinder is selectively movable to and from the blanket cylinder; inking device and fountain solution are selectively movable to and from the plate cylinder .

[0007]

In the offset rotary press according to the present invention which is constructed as described above, the blanket cylinder, the plate cylinder, the inking device and the dampening water device are arranged below the impression cylinder. The blanket cylinder is selectively movable relative to the impression cylinder; the plate cylinder is selectively movable relative to the blanket cylinder; the inking device and the dampening device are relative to the plate cylinder. As the blanket cylinder, the plate cylinder, the inking device, and the dampening water device are respectively brought into contact with and separated from the corresponding impression cylinder, blanket cylinder, and plate cylinder, The blanket and plate can be replaced easily, and the blanket and plate replacement work does not require a relatively long time, and the blanket and plate replacement can be performed quickly.

For this reason, when printing images of various sizes, such as a calendar, by changing the contents of the plate by a relatively small amount (changing the customer name, telephone number, etc.), conventionally, it is a single sheet. Although the printing press was used, it is possible to use the offset rotary press according to the present invention, which is characterized in that the printing is performed as described above much faster than the sheet-fed printing press.

Further, in the above-mentioned conventional rotary offset press, since the moving distance for contacting and separating as described above is small, in order to prevent the damage of the paper between the impression cylinder and the blanket cylinder during the replacement work of the blanket or plate. During the replacement work, the paper was removed from between the impression cylinder and the blanket cylinder. For this reason, the paper is wasted, and it takes a relatively long time to restart the printing after the replacement work.

For this reason, in the offset rotary press according to the present invention, which is configured as described above, the blanket cylinder and the plate cylinder are selectively replaceable with respect to the main frame of the offset rotary press. It can be further characterized by being supported by.

With such a configuration, when the blanket and / or the plate are replaced, if an exchange frame independent of the offset rotary press in use is prepared, the offset in use in the exchange frame can be prepared. Blankets and / or plates can be changed independently of the press. Then, after temporarily stopping the operation of the offset rotary press in use, the replacement frame in use while the paper is still installed at the predetermined position of the offset rotary press in use is replaced with the new replacement frame prepared as described above. Can be changed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An offset rotary press according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a schematic side view of an offset simplex printing machine using a plurality of offset rotary presses according to an embodiment of the present invention. This offset simplex printing machine is used, for example, when printing images of various sizes such as a calendar while changing the contents of the plate in relatively small amounts (changing the customer name, telephone number, etc.).

The offset single-sided printing machine shown in FIG. 1 includes a paper feed device 10, an infeed device 12, and five offset rotary presses 14a, 14b, 14 according to an embodiment of the present invention.
c, 14d, 14e, a dryer 16, a chill roll device 18, and a paper winding device 20 are provided.

The paper feeding device 10 includes a plurality of paper rolls 10a, 1a.
0b is supported, and the paper 11 is constantly fed toward the infeed device 12 from any one of the plurality of paper rolls 10a and 10b without causing a large time interval.

The infeed device 12 always keeps the tension of the sheet 11 toward the five offset rotary presses 14a, 14b, 14c, 14d, 14e substantially constant. The five offset rotary presses 14a, 14b, 14c, 14d, 14e are for cyan, magenta, yellow, black and additional printing, and the plates and inks used have different colors, but the basic structure is Is the same as Here, the additional printing is the company name or company telephone number that is additionally printed on the common image of the calendar, and the offset of the same structure for special printing with gold, silver or fluorescent ink. It is possible to add as many rotary presses as desired.

The dryer 16 includes five offset rotary presses 1
Paper 1 at 4a, 14b, 14c, 14d, 14e
It is used to dry the ink printed on 1. The chill roll device 18 is used for the paper 11 dried by the dryer 16.
And allow the ink on it to cool.

The paper winding device 20 has a plurality of paper winding parts 20a and 20b, and the chill roll device 18 is provided.
The printed paper 11 is always received by either one of the paper take-up units 20a and 20b.

In the offset simplex printing machine of FIG. 1, five offset rotary presses 14a, 14b, 14c, 14d, 1 are used.
Paper feed device 10, infeed device 14, dryer 16, chill roll device 18, and paper take-up device 2 other than 4e
The respective structures of 0 are widely known and will not be described in detail below.

FIG. 2 shows the structure of the first offset rotary press 14a as a representative of the five offset rotary presses 14a, 14b, 14c, 14d and 14e having the same structure, as viewed from the side of the offset rotary press 14a. The situation is shown schematically.

The offset rotary press 14a includes an impression cylinder 30,
Blanket cylinder 32, plate cylinder 34, and inking device 3
6 and a dampening water device 38, and a blanket cylinder 32, a plate cylinder 34, an inking device 36, and a dampening water device 38 are arranged below the impression cylinder 30.

The impression cylinder 30 is rotatably and detachably supported on the upper end of the main frame 42 of the offset rotary press 14a fixed to the floor 40. Blanket cylinder 32 and plate cylinder 3
4 is rotatably supported on the main frame 42 by a removable exchange frame 44 from the side of the main frame 42.

The blanket cylinder 32 is further supported by the replacement frame 44 so as to be selectively contactable with and separable from the impression cylinder 30 for replacement of the blanket, and is arranged at the contact position in FIG. .

The plate cylinder 34 also has an exchange frame 44.
In order to replace the plate, the blanket cylinder 32 is selectively supported by the blanket cylinder 32 so that it can be moved freely.

The inking device 36 and the dampening water device 38 are selectively attached to and separated from the plate cylinder 34 by a main frame 42.
2 are shown by dotted lines and their separated positions by solid lines in FIG.

In the offset rotary press 14a constructed as described above, during printing, the blanket cylinder 32, the plate cylinder 34,
The inking device 36 and the dampening water device 38 are arranged at respective contact positions.

In order to replace the blanket and / or the plate, the replacement frame 4 is operated while the offset rotary press 14a is in operation.
Another exchange frame (not shown) having the same structure as that of No. 4 is prepared independently of the offset rotary press 14a, and the blanket cylinder and / or the plate cylinder arranged at the separated position in the other exchange frame (not shown) Install a new blanket and / or plate.

When the need for replacement arises, the operation of the offset rotary press 14a is interrupted, and the blanket cylinder 32, the plate cylinder 34, the inking device 36, and the dampening water device 38 are separated from each other. Replacement frame 44 that has been used until now from the offset rotary press 14a after being moved to
Take out and instead use the offset rotary press 1 as described above.
Another exchange frame (not shown) prepared independently from 4a is attached to the offset rotary press 14a.

Here, the exchange frame 4 as described above is used.
The exchange work of No. 4 is easy because the exchange frame 44 is below the impression cylinder 30 and near the floor 40. Further, it is not necessary to remove the paper 11 from the offset rotary press 14a, that is, the offset simplex printing machine of FIG. 1 during the replacement work. This is because the offset rotary press 14a does not replace the blanket and / or the plate.

After this, the blanket cylinder 32 and the plate cylinder 3
4, the inking device 36, and the dampening water device 38 are immediately returned to their respective contact positions, and immediately the offset rotary press 14
The operation of a can be restarted.

In the offset single-sided printing machine shown in FIG.
Table offset rotary presses 14a, 14b, 14c, 14
Each of d and 14e has an independent rotation drive device. This is the paper 1 after the replacement frame 44 is replaced.
This is because the position of the plate on the plate cylinder 34 with respect to 1 can be easily and quickly aligned.

Further, in the offset simplex printing machine of FIG.
Instead of the paper winding device 20, a theta 50 as shown in FIG.
Can be used. Theta 50 is a roll of paper 10a
The strip-shaped sheet 11 pulled out from the sheet is provided with five offset rotary presses 14a, 14 in the longitudinal direction of the sheet 11.
After cutting the paper 11 at least in the width direction at a predetermined position between a plurality of the same images printed by b, 14c, 14d, and 14e to form a sheet 51 including each of the plurality of images, Stack and save.

Although the basic structure of the theta 50 is well known in the art, the theta 50 used in the offset simplex printing machine of FIG. Since the size of
A pair of rotary blades 50a and 50b are supported by a main frame 52 of the theta 50, which is detachably attached to a replaceable frame 54, so as to be rotatable and movable toward and away from each other. A large number of exchange frames 54 having a plurality of pairs of rotary blades corresponding to various image sizes printed on one sheet by the offset single-sided printing machine shown in FIG. In addition, the replacement frame 54 of the theta 50 can be easily and quickly replaced if necessary.

[0033]

As described in detail above, in the offset rotary press according to the present invention, the blanket cylinder, the plate cylinder, the inking device, and the dampening water device respectively correspond to the impression cylinder, the blanket cylinder, and the plate cylinder. The work of contacting and separating from each other can be facilitated, and the blanket or plate can be replaced quickly without requiring a relatively long time to replace the blanket or plate.

[Brief description of drawings]

FIG. 1 is a schematic side view of an entire offset single-sided printing press using a plurality of offset rotary presses according to an embodiment of the present invention.

2 is a schematic side view of an example offset rotary press according to the present invention used in the offset simplex printing machine of FIG. 1. FIG.

FIG. 3 is a schematic side view of a theta that can be used instead of the paper winding device 20 in the offset single-sided printing machine of FIG.

[Explanation of symbols]

10 ... Paper feeding device, 10a, 10b ... Rolled paper, 11 ... Paper, 12 ... Infeed device, 14a, 14b, 14
c, 14d, 14e ... Offset rotary press, 16 ... Dryer, 18 ... Chill roll device, 20 ... Paper winding device, 20
a, 20b ... Paper take-up section, 30 ... impression cylinder, 32 ... blanket cylinder, 34 ... plate cylinder, 36 ... inking device, 38 ... dampening water device, 40 ... floor, 42 ... main frame, 44 ... exchange frame , 50 ... Theta, 51 ... Sheet, 52 ... Main frame, 54 ...
Replacement frame.

Claims (2)

[Claims] 1. An impression cylinder, a blanket cylinder, a plate cylinder, an inking device, and a dampening device. The blanket cylinder, the plate cylinder, and the inking device are provided below the impression cylinder. , A dampening water device is arranged, the blanket cylinder is selectively movable to and from the impression cylinder, and the plate cylinder is selectively movable to and from the blanket cylinder. An offset rotary press characterized in that the dampening water device can be selectively brought into and out of contact with the plate cylinder. 2. The offset rotary press according to claim 1, wherein the blanket cylinder and the plate cylinder are supported by an exchange frame which is selectively removable from a main frame of the offset rotary press.