JPH08207247A - Sheet-fed printing machine - Google Patents

Abstract

(57) [Summary] [Purpose] Put perforations in the printing line in a direction parallel to the sheet pass line and in a direction perpendicular to the sheet without soiling the sheet. [Structure] A sheet 101 from a paper feeder 11 is held by an impression cylinder 21a of a first printing unit 20a and printed by a blanket cylinder 22a, and delivered to a transfer cylinder 24a while being dried by a UV lamp 31a. The second printing unit 20b, the third printing unit 20c,
Sheet 1 that has been similarly printed and dried in the fourth printing unit 20d
01 is held by the impression cylinder 41, and the sheet 10 is
A sheet having perforations in a direction parallel to the first pass line and a direction orthogonal to the first pass line is sent from the paper pick-up cylinder 51 to the paper stack 54 via the chain 53.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a sheet-fed printing press.

[0002]

2. Description of the Related Art FIG. 5 shows a schematic structure of a conventional sheet-fed offset printing machine, which is an example of a sheet-fed printing machine for printing paper preliminarily cut into sheets.

As shown in FIG. 5, the sheet 101 fed from the sheet feeder 11 to the table 12 has a first printing section 20a.
Of the plate cylinder 23a, the ink is transferred to the blanket cylinder 22a, the printing is performed on the transfer cylinder 24a, and then the second printing unit 20b and the third printing unit 2 are similarly printed.
0c, it is sent to the fourth printing unit 20d, and multicolor printing is performed.
The multicolored sheets 101 are received by the paper pick-up cylinder 51, sent by the chain 53, and stacked on the paper stacking table 54.

The printed sheet 101 has a paper take-up cylinder 5
Before being received at 1, the perforation is made at the perforation device 40 with the impression cylinder 41 and the perforation gear 45.

As shown in FIG. 6 showing the external appearance of the main part of the sewing machine 40, since the sewing machine gear 45 is a gear type, the sheet 101 is a sewing machine in a direction parallel to the pass line of the sheet 101. If only perforations can be made and perforations are made in the direction orthogonal to the pass line of the sheet 101,
Since it is necessary to further perforate the sheets 101 after they have been stacked with a perforation processing dedicated machine, it is very troublesome.

[0006] Therefore, by replacing the sewing machine gear 45 with a sewing machine toothed drum, a protruding tooth portion provided on the surface of the body at predetermined intervals in a direction parallel to and orthogonal to the path line of the sheet 101 is used. There is a method of making perforations in a direction parallel to and a direction orthogonal to the pass line of the sheet 101 simultaneously with printing.

[0007]

However, since the above-described sewing machine tooth barrel cannot increase the height of the tooth portion due to its strength, the surface of the sewing machine tooth barrel is always the sheet 101.
When the perforation is made in the vicinity of the printed portion of the sheet 101, the surface of the perforated tooth cylinder comes into contact with the printed portion immediately after printing, and the sheet 101 is soiled. There was a problem of being lost.

[0008]

In order to solve the above-mentioned problems, the present invention provides a sheet-fed printing machine provided with a perforation device for perforating printed sheets, wherein the perforation is performed by the perforation device. A drying means was provided for drying the previously printed sheets.

[0009]

In the sheet-fed printing machine having the above-described structure, the printed sheet is dried by the drying means and the perforation is made by the sewing machine. Perforations can be inserted.

[0010]

FIG. 1 shows a schematic structure of a sheet-fed offset printing press which is an example of a sheet-fed printing press according to the present invention.

As shown in the drawing, a table 12 provided with a register (not shown) for positioning the fed sheets 101 is provided at the feeding port of the paper feeder 11 for feeding the sheets 101 one by one. It is installed.

On the tip side of the table 12, the table 12
There is provided an impression cylinder 21a having a pawl (not shown) for holding the sheet 101 sent to the sheet. A blanket cylinder 22a, around which a blanket (not shown) for printing on the sheet 101 is wound, is provided above the impression cylinder 21a. On the upper part of the blanket cylinder 22a, a plate cylinder 23a having a plate (not shown) for transferring ink to the blanket is provided.
An ink supply device (not shown) that supplies ink to the plate is provided above the plate cylinder 23a. A transfer cylinder 24a provided with a pawl (not shown) for receiving the sheet 101 held by the impression cylinder 21a is provided downstream of the impression cylinder 21a on the path line of the sheet 101.

That is, the sheet 1 held by the impression cylinder 21a
01 is printed on the blanket of the blanket cylinder 22a onto which the plate of the plate cylinder 23a is transferred, and then transferred to the transfer cylinder 24a.

The impression cylinder 21a, the blanket cylinder 22a, the plate cylinder 23a, the ink supply device, the transfer cylinder 24a and the like constitute the first printing section 20a.

The impression cylinder 21b, the blanket cylinder 22b, the plate cylinder 23b, the ink supply device, the transfer cylinder 24b, etc. are provided on the downstream side of the sheet 101 of the first printing unit 20a in the path line, like the first printing unit 20a. The second printing unit 20b provided in the above is provided. That is, the sheet 101 from the transfer cylinder 24a of the first printing unit 20a is transferred to the impression cylinder 21b of the second printing unit 20b, printed in the same manner as the first printing unit 20a, and transferred to the transfer cylinder 24b. It is done.

Similarly, the impression cylinder 21c and the blanket cylinder 22 will be described below.
c, the plate cylinder 23c, the ink supply device, the third printing unit 20c including the transfer cylinder 24c, the impression cylinder 21d, and the blanket cylinder 22.
The fourth printing unit 20d including the d, the plate cylinder 23d, the ink supply device, the transfer drum 24d, and the like is provided. By using various colors and plates of ink in each printing unit, a multicolor printed matter can be produced. .

A UV lamp 31 for drying the ink printed on the sheet 101 is provided on the side of the impression cylinder 21a between the blanket cylinder 22a and the transfer cylinder 24a of the first printing unit 20a.
a is provided so as to face the peripheral surface of the impression cylinder 21a, and the second printing unit 20b, the third printing unit 20c, and the fourth printing unit 20d also have
UV lamps 31b, 31c, similar to the first printing unit 20a,
31d is provided respectively. That is, the sheet 101 printed by each printing unit is sent out after being dried by each printing unit.

Sheet 1 of transfer cylinder 24d of the fourth printing section 20d
On the downstream side of the 01 pass line, an impression cylinder 41 having a pawl (not shown) for receiving the sheet 101 from the transfer cylinder 24d is provided. On the upper part of the impression cylinder 41, there is provided a perforation drum 42 for making perforations on the sheet 101 in a direction parallel to and perpendicular to the path line of the sheet 101.

FIG. 2 shows the appearance of the impression cylinder 41 and the sewing machine tooth barrel 42, and FIG. 3 shows the appearance of the sewing machine tooth portion 42 with part of the sewing machine teeth omitted.

A plate material 4 is provided on the outer peripheral surface of the sewing machine body 42.
3 is wrapped around. On the surface of the plate material 43, a protruding tooth portion 44b is provided on a belt-shaped base portion 44a.
A plurality of sticking machine teeth 44 protruding along the longitudinal direction of the sticking machine tooth are provided at predetermined intervals in the direction parallel to the path line of the sheet 101 and in the direction orthogonal thereto. 44 is attached to the plate material 43 via a double-sided adhesive tape, and is also attached by an adhesive film tape so as to connect the upper surface of the base portion 44a and the surface of the plate material 43. A blanket 41a is wound around the outer peripheral surface of the impression cylinder 41, and the tooth portion 44b and the impression cylinder 4 are provided.
1 is protected, and perforations are easily inserted in the sheet 101.

The press machine 41, the machine tooth cylinder 42, the plate material 43, the sticking machine teeth 44, etc. are used to form the sewing machine 4 of this embodiment.
0 is configured.

A paper take-up cylinder 5 for receiving the sheet 101 from the impression cylinder 41 is provided downstream of the impression cylinder 41 in the path line of the sheet 101.
1 is provided. The sprocket 5 is attached to the paper take-up cylinder 51.
2a is provided, and a sprocket 52b is provided downstream of the sheet 101 of the paper take-up cylinder 51 on the path line.
A chain 53 is engaged with the sprockets 52a and 52b so as to connect the sprockets 52a and 52b. The chain 53 is provided with a tab (not shown) provided with a gripper (not shown) for holding the sheet 101. Below the sprocket 52b, a paper stack 54 for stacking the sheets 101 is provided.
The paper stacking table 54 is configured to move in the vertical direction according to the number of sheets 101 to be stacked.

That is, when the sheet 101 received by the paper take-up cylinder 51 is sent to the sprocket 52b by the chain 53, the grips of the claws are opened, and the sheet 10 is conveyed.
1 is dropped and stacked on the paper stack 54.

To print with the sheet-fed offset printing machine of this embodiment, the sheet 101 is sent from the sheet feeder 11 to the table 12. The sheet 101 is held by the impression cylinder 21a of the first printing unit 20a, and offset printing is performed by the blanket cylinder 22a. The printed sheet 101 is UV
The ink is dried by the lamp 31a and then transferred to the transfer drum 24a. Hereinafter, the sheet 101 will be referred to as the second printing unit 20.
b, the third printing unit 20c and the fourth printing unit 20d perform printing and drying in the same manner as the first printing unit 20a.

The printed and dried sheet 101 is
The sheet 101 is transferred to the impression cylinder 41, and the sewing machine body 42 transfers the sheet 101
Perforations are made at predetermined intervals in the direction parallel to the pass line of and the direction perpendicular to the pass line. At this time, since the ink printed on the sheet 101 is dried, the sticking machine teeth 44
Even if the base portion 44a, the plate material 43, or the like comes into contact with the printed portion of the sheet 101, the sheet 101 is not soiled.

The perforated sheet 101 is received by the paper take-up cylinder 51 and is chained by the chain 53 to the paper stack 54.
Will be sent to.

Therefore, the sheet 101 does not become dirty and
All the necessary perforations are placed in the print line.

In the above-described embodiment, the UV lamps 31a, 31b, 31c, 31d are provided in the respective printing units. However, if there is no space for providing the UV lamps in the layout of the respective printing units, the UV lamps are provided in the sewing machine. It may be provided.
Such another embodiment will be described with reference to FIG. However, the same parts as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 4, UV lamps 31a, 3
1b is a first printing unit 20a and a second printing unit 20b, respectively.
The UV lamps 31c and 31d are provided on the upstream side of the pass line of the sheet 101 of the impression cylinder 41.

Therefore, the third printing section 20c and the fourth printing section 2
The sheet 101 on which the 0d ink is printed is dried by the UV lamps 31c and 31d provided in the sewing machine 40 and then perforated, so that the sheet 101 is necessary without being soiled. All perforations are placed in the print line.

In the above-described embodiments, the UV lamps 31a, 31b, 31c corresponding to the respective printing units are provided.
31d are provided respectively. For example, a high-output UV lamp is provided between the blanket cylinder 22d between the downstream side of the sheet 101 and the upstream side of the sheet 101 of the sewing machine drum 42. Only one path line may be provided on the paper 101.

Also, in these previously described embodiments, UV
Although the lamps 31a, 31b, 31c, 31d are used as the drying means, the present invention is not limited to this, and any means for drying printed sheets can achieve the same effect.

In the above-described embodiments, the sewing machine tooth 42 is provided with the sticking machine teeth 44 in the direction parallel to the pass line of the sheet 101 and in the direction orthogonal thereto. Then, the pasting machine teeth may be provided on the machine tooth barrel only in the direction parallel to or perpendicular to the sheet pass line.

In these previously described embodiments, the tooth portion 44b
The plate material 43 having the sticking perforated sewing teeth 44 provided thereon was wound around the sewing machine tooth barrel 42. The same effect can be obtained by providing a plurality of protruding tooth portions with a predetermined interval on the outer periphery of the sewing machine tooth barrel. To be

Although the above-mentioned embodiments are applied to the sheet-fed offset printing machine, they can also be applied to other sheet-fed printing machines such as a sheet-fed relief printing machine.

[0036]

As described above, in the sheet-fed printing press according to the present invention, the printed sheet is dried by the drying means and then perforated by the sewing machine, so that the sheet is soiled with ink. Instead, all the necessary perforations can be placed on the sheet in the printing line.

[Brief description of drawings]

FIG. 1 is a schematic structural diagram of an embodiment in which a sheet-fed printing press of the present invention is applied to a sheet-fed offset printing machine.

FIG. 2 is an external view of the main part of the sewing machine device.

FIG. 3 is a partially omitted external view of the sewing machine tooth portion.

FIG. 4 is a schematic structural diagram of another embodiment in which the sheet-fed printing press of the present invention is applied to a sheet-fed offset printing machine.

FIG. 5 is a schematic structural diagram of a conventional sheet-fed offset printing machine.

FIG. 6 is an external view of the main part of the sewing machine device.

[Explanation of symbols]

 11 Paper Feeding Machine 12 Table 20a First Printing Section 20b Second Printing Section 20c Third Printing Section 20d Fourth Printing Section 21a Imprinting Cylinder 22a Blanket Cylinder 23a Plate Cylinder 24a Transfer Cylinder 31a UV Lamp 40 Sewing Machine 41 Pressure Cylinder 41a Blanket 42 Sewing machine body 43 Plate material 44 Sticking machine tooth 44a Base part 44b Tooth part 51 Paper take-up cylinder 52a Sprocket 52b Sprocket 53 Chain 54 Paper stack 101 Sheets

Claims (1)

[Claims] 1. A sheet-fed printing press provided with a perforation device for perforating printed sheets, provided with a drying means for drying the printed sheet before perforation is performed by the perforation device. A sheet-fed printing press characterized in that