JP2001225442A - Printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing machine, with which ink can be favorably transferred from a rotary screen to a sheet-like matter held on an impression cylinder. SOLUTION: This printing machine is equipped with a screen printing unit 20e having the impression cylinder 21e, which is rotatably supported and has a gripping device 21e1 for holding a sheet 1, a rubber cylinder 22e, which is rotatably supported and comes into opposingly contact with the impression cylinder 21e and has a notched part 21eb at the position opposite to the gripping device 21e1 of the impression cylinder 21e, and a rotary screen 27, which comes into opposingly contact with the rubber cylinder 22e so as to transfer special ink or the like to the rubber cylinder 22e.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing machine for printing by transferring ink to a sheet-like material such as a sheet held on an impression cylinder, and more particularly to a printing machine for performing screen printing on a sheet. It is effective when applied.

[0002]

2. Description of the Related Art Conventional printing presses for performing screen printing include:
A rotary screen equipped with an ink fountain and a squeegee fixedly supported on a frame inside a hollow cylinder that rotatably supports a thin screen (made of stainless steel, nickel, etc.) with small holes etched according to the pattern By printing the ink in the ink fountain from the small hole of the hollow cylinder with a squeegee while rotating the hollow cylinder, printing corresponding to the pattern can be performed.
For this reason, the rotary screen printing can be printed with a thick ink using a special ink or the like, so that it is applied when giving a high-quality appearance or touch.

[0003]

As described above, since the rotary screen prints by extruding a special ink or the like from a small hole while pressing a thin hollow cylinder with a squeegee from the inside, the screen is screened on the web. When printing is performed, it is difficult to satisfactorily perform printing because the web tension tends to change.

[0004] On the other hand, when printing on a sheet using a rotary screen, the tension is not changed in the sheet, so that the printing can be performed satisfactorily. Since the gripper must be provided on the impression cylinder, the gripper may come into contact with the hollow cylinder of the rotary screen that is in contact with the impression cylinder, and may damage the hollow cylinder.

[0005] In view of the above, an object of the present invention is to provide a printing machine that can transfer ink from a rotary screen to a sheet-like material held by an impression cylinder.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a printing machine according to the present invention comprises: an impression cylinder having sheet-like material holding means rotatably supported to hold a sheet-like material; A rubber cylinder having a notch at a position opposed to the impression cylinder and opposed to the sheet-like material holding means of the impression cylinder, and transferring ink to the rubber cylinder in contact with the rubber cylinder. And a rotary screen.

In the above-described printing press, a cover having a relief hole at a position of the impression cylinder facing the sheet-like material holding means is attached to the notch of the blanket cylinder.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a printing machine according to the present invention will be described with reference to FIGS. FIG. 1 is an overall schematic configuration diagram of a printing press, FIG.
Is an enlarged view of an arrow III in FIG. 1 and FIG. 4 is a view as seen from the direction of the arrow IV in FIG.

As shown in FIG. 1, the paper supply section 10 is provided with a paper supply table 11. The paper feed unit 10 includes a paper feed table 11
A feeder board 12 that feeds the upper sheet-like sheet 1 to the printing unit 20 one by one is provided. At the leading end of the feeder board 12, a swing device 13 for transferring the sheet 1 to the impression cylinder 21a of the first offset printing unit 20a of the printing unit 20 is provided.

As shown in FIGS. 1 and 2, a blanket cylinder 22a is in contact with the impression cylinder 21a of the first offset printing unit 20a of the printing unit 20 in the rotation direction downstream of the swing device 13. A plate cylinder 23a is in contact with the blanket cylinder 22a on the upstream side in the rotation direction from the impression cylinder 21a. An ink supply device 24 is disposed upstream of the plate cylinder 23a in the rotation direction from the blanket cylinder 22a.
a is provided. Ink supply device 24 for plate cylinder 23a
A water supply device 25a is provided on the upstream side in the rotation direction from a.

As shown in FIG. 1, the downstream side of the impression cylinder 21a of the first offset printing unit 20a in the rotational direction from the blanket cylinder 22a is opposed to the impression cylinder 21b of the second offset printing unit 20b via a transfer cylinder 26a. In contact. The second offset printing unit 20b includes a blanket cylinder 22b and a plate cylinder 2 in the same manner as the first offset printing unit 20a.
3b, an ink supply device 24b, a water supply device 25b, and the like.

The second offset printing unit 20b
The downstream side of the impression cylinder 21b in the rotation direction from the blanket cylinder 22b is connected via the transfer cylinder 26b to the third offset printing unit 20c.
Is in contact with the impression cylinder 21c. The third offset printing unit 20c also has a blanket cylinder 22c and a plate cylinder 2 in the same manner as the first and second offset printing units 20a and 20b.
3c, an ink supply device 24c, a water supply device 25c, and the like.

Further, the third offset printing unit 20
The downstream side in the rotational direction from the blanket cylinder 22c of the impression cylinder 21c of FIG.
Via the transfer cylinder 26c, the fourth offset printing unit 20
d is in contact with the impression cylinder 21d. The fourth offset printing unit 20d also includes a blanket cylinder 22d, a plate cylinder 23d, an ink supply device 24d, a water supply device 25d, and the like, similarly to the first to third offset printing units 20a to 20c.

As shown in FIGS. 1 and 3, the impression cylinder 21e of the screen printing unit 20e is opposed to the impression cylinder 21d of the fourth offset printing unit 20d via a transfer cylinder 26d at a position downstream of the blanket cylinder 22d. In contact. Impression cylinder 21e
Downstream of the transfer cylinder 26d in the rotational direction, the blanket cylinder 22
e is facing.

A notch 22eb is formed on the outer peripheral surface of the trunk body 22ea of the blanket cylinder 22e at a position facing the gripper device 21e1, which is a sheet-like material holding means of the impression cylinder 21e. Notch 22e of torso body 22ea
Inside b, a holding device 22ec that holds an end of a rubber blanket 22ed wound around the outer peripheral surface of the trunk main body 22ea is provided. A plate-shaped cover 22ee having the same curvature as the outer peripheral surface of the body 22ea is attached to the notch 22eb of the body 22ea so as to cover the notch 22eb. The claw device 21e of the impression cylinder 21e of the cover 22ee
As shown in FIG.
ef is formed so that interference between the cover 22ee and the gripper device 21e1 can be avoided.

A rotary screen 27 is in contact with the blanket cylinder 22e on the upstream side in the rotation direction from the impression cylinder 21e. The rotary screen 27 has a hollow body 27a that rotatably supports a thin screen (made of stainless steel, nickel, or the like) in which a small hole corresponding to a pattern is etched, and is fixed to a frame inside the hollow body 27a. Supported ink fountain 27b and squeegee 27
c.

That is, in the rotary screen 27, the hollow cylinder 27a rotates with the rotation of the impression cylinder 21e, and the special ink or the like, which is the liquid in the ink fountain 27b, is squeegee 27c.
As a result, the special ink or the like can be transferred to the blanket 22ed of the blanket cylinder 22e by being extruded from the small holes of the hollow cylinder 27a.

As shown in FIG. 1, a transfer cylinder 26e is in contact with the impression cylinder 21e of the screen printing unit 20e downstream of the blanket cylinder 22e in the rotation direction. The drying unit 20 is located downstream of the transfer cylinder 26e in the rotation direction from the impression cylinder 21e.
f is in contact with the transfer cylinder 28. A drying lamp 29 for irradiating ultraviolet rays (UV) is provided downstream of the transfer cylinder 26e in the rotation direction from the transfer cylinder 26e.

A discharge cylinder 31 of a discharge section 30 is in contact with the transport cylinder 28 of the drying unit 20f on the downstream side in the rotation direction from the drying lamp 29. A sprocket 32 is provided on the paper discharge cylinder 31 so as to be coaxial and integrally rotatable. Further, the paper discharge unit 30 is provided with a paper discharge table 35. A sprocket 33 is provided above the paper output tray 35.
Is provided. Between the sprockets 32 and 33, a paper output chain 34 having a plurality of paper output claws (not shown) attached at predetermined intervals is stretched.

The operation of the thus constructed printing press will now be described.

The sheet 1 sent out one by one from the sheet feeding table 11 of the sheet feeding unit 10 onto the feeder board 12 is moved by the swing unit 13 to the first offset printing unit 20 of the printing unit 20.
a, while supplying ink and dampening water from the ink supply device 24a and the water supply device 25a of the first offset printing unit 20a to the plate cylinder 23a, and from the plate cylinder 23a to the blanket cylinder 22a. Then, the sheet 1 is transferred to the impression cylinder 21b of the second offset printing unit 20b via the transfer cylinder 26a after the ink is transferred from the blanket cylinder 22a and the first color printing is performed. Like the first offset printing unit 20a,
The second color printing is performed in the second offset printing unit 20b, and the third and fourth color printing is similarly performed in the third and fourth offset printing units 20c and 20d, and the screen is transferred via the transfer cylinder 26d. It is delivered to the impression cylinder 21e of the printing unit 20e.

The impression cylinder 21 of the screen printing unit 20e
As described above, the sheet 1 transferred to the sheet e is printed with a thick ink using the special ink or the like from the rotary screen 27 via the blanket cylinder 22e. At this time, the escape hole 22ef of the cover 22ee of the blanket cylinder 22e can avoid interference with the gripper device 21e1 of the impression cylinder 21e, and the cover 22ee allows the notch 22eb of the squeegee 27c of the rotary screen 27 to be formed.
The fall into the inside can be prevented.

The sheet 1 on which the emboss printing has been performed by the screen printing unit 20e is transferred from the impression cylinder 22e to the transfer cylinder 26e, and then transferred to the transfer cylinder 28 of the drying unit 20f, where the drying lamp is used. After the printed special ink or the like is dried by the UV from 29, it is delivered to the paper discharge cylinder 31 of the paper discharge unit 30, and is discharged via the paper discharge claw.
The paper is conveyed by the traveling movement of No. 4 and discharged onto the paper discharge table 35.

In such a printing press, as described above, the relief hole 2 of the cover 22ee of the blanket cylinder 22e is provided.
2ef avoids interference of the impression cylinder 21e with the holding claw device 21e1, so that there is no obstacle to the rotary screen 27 and the cover 22e of the blanket cylinder 22e.
e, the squeegee 27c of the rotary screen 27
Is prevented from falling into the notch 22eb,
Sheet 1 without damaging the rotary screen 27
Can be screen printed.

Therefore, according to the above-mentioned printing machine, the thick printing of the special ink or the like by the rotary screen 27 can be favorably performed on the sheet 1.

In this embodiment, the screen printing unit 20e and the drying unit 20f are arranged downstream of the first to fourth offset printing units 20a to 20d. For example, as shown in FIG. 6, a screen printing unit 20e and a drying unit 20f are arranged upstream of the first to fourth offset printing units 20a to 20d, or as shown in FIG. It is also possible to arrange a screen printing unit 20e and a drying unit 20f between the four offset printing units 20c and 20d.

In this embodiment, the offset printing units 20a to 20d and the screen printing unit 20
e has been described as being applied to a printing machine that combines e.g., for example, as shown in FIG. 7, there is no offset printing unit, and the paper feeding unit 10 and the screen printing unit 2
0e, a drying unit 20f, and a paper discharge unit 30.

Further, in the present embodiment, the case where special ink or the like is put into the ink fountain 27b of the rotary screen 27 of the screen printing unit 20e to perform thick printing is described, but the present invention is not limited to this. In the case of supplying a liquid from a rotary screen to a sheet-like material held by an impression cylinder, such as a case where a varnish or the like is put into an ink fountain and a varnish is applied to a sheet as a coating device, It can be applied in the same manner as in the case where it is performed.

In the present embodiment, the cover 22e having a relief hole 22ef at a position facing the gripper device 21e1 of the impression cylinder 21e of the screen printing unit 20e.
e was attached to the notch 22eb of the blanket cylinder 22e,
For example, by providing covers only at both ends in the axial direction of the cutout portion of the blanket cylinder, a relief hole is provided at a position facing the gripper device of the impression cylinder, and interference with the gripper device of the impression cylinder is provided. It is also possible to prevent the squeegee on the rotary screen from falling while avoiding the problem.

[0030]

According to the present invention, there is provided a printing press comprising: an impression cylinder having a sheet-like material holding means rotatably supported to hold a sheet-like article; and a rotatably supported impression cylinder in contact with the impression cylinder. Since there is provided a blanket cylinder having a notch at a position facing the sheet-like material holding means of the cylinder, and a rotary screen which contacts the blanket cylinder and transfers ink to the blanket cylinder, the sheet of the impression cylinder is provided. The object holding means does not interfere with the rotary screen. Therefore, the transfer of the ink by the rotary screen can be favorably performed on the sheet-like material.

Also, since a cover having a notch groove at a position facing the sheet-like material holding means of the impression cylinder is attached to the notch portion of the blanket cylinder, the sheet-like material holding means of the impression cylinder can be provided. The interference of the rotary screen with the notch of the blanket cylinder can be prevented while avoiding interference with the rotary screen.

[Brief description of the drawings]

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

FIG. 2 is an enlarged enlarged view of an arrow II in FIG. 1;

FIG. 3 is an enlarged view of an arrow III in FIG. 1;

FIG. 4 is a view as seen from a direction of an arrow IV in FIG. 3;

FIG. 5 is an overall schematic configuration diagram of another embodiment of a printing press according to the present invention.

FIG. 6 is an overall schematic configuration diagram of another embodiment of a printing press according to the present invention.

FIG. 7 is an overall schematic configuration diagram of another embodiment of a printing press according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet 10 paper feed unit 11 paper feed table 12 feeder board 13 swing unit 20 printing unit 20 a to 20 d first to fourth offset printing unit 20 e screen printing unit 20 f drying unit 21 a to 21 d impression cylinder 21 e 1 gripper unit 22 a to 22 d Blanket cylinder 22ea barrel main body 22eb cutout portion 22ec holding portion 22ed blanket 22ee cover 22ef escape hole 23a-23d plate cylinder 24a-24d ink supply device 25a-25d water supply device 26a-26e transfer cylinder 27 rotary screen 27b hollow cylinder 27b Squeegee 28 Conveyor cylinder 29 Drying lamp 30 Discharge unit 31 Discharge cylinder 32, 33 Sprocket 34 Discharge chain 35 Discharge table

Claims (2)

[Claims] 1. An impression cylinder having a sheet-like material holding means rotatably supported to hold a sheet-like object, and a rotatably supported impression plate in contact with the impression cylinder, and holding the sheet-like material of the impression cylinder. A printing press, comprising: a blanket cylinder having a notch at a position facing the means; and a rotary screen that contacts the blanket cylinder and transfers ink to the blanket cylinder. 2. The printing method according to claim 1, wherein a cover having a relief hole at a position of the impression cylinder facing the sheet-like material holding means is attached to the notch of the blanket cylinder. Machine.