JP3372457B2 - Sheet-fed duplex printing machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a sheet-fed offset printing press configured to perform multicolor printing on both sides of a sheet. 2. Description of the Related Art FIGS. 5 to 7 are explanatory views of a structure example of a general double-sided printing sheet-fed offset printing press. In the printing press shown in FIG. 5 , the front side printing unit 51 and the back side printing unit 5
2 are arranged above and below the sheet path line, and the impression cylinders 58 provided in the units 51 and 52 of the same part are connected in the horizontal direction, thereby forming one unit of the front and back printing unit 54. Accordingly, in the entire sheet-fed offset printing press, a plurality of sets of the one unit of the front and back printing units 54 are composed of two intermediate cylinders 55 provided with paper holding claws (not shown).
a, 55b, and is connected horizontally in the running direction of the seat 56. FIG. 5 exemplifies a form in which four sets of front and back printing units 54 are provided in parallel, so that multicolor printing of four colors can be performed on each of the front and back sides of the sheet 56. In the printing machine having the above-described structure, a paper feeding device 57 is provided.
Is sent to the front and back printing unit 54 via the intermediate cylinder, and is wound around the impression cylinder 58a and moves between the blanket cylinder 59a. First, a first color pattern is transferred (printed) on the surface of the first color. Next, the sheet 56 is directly transferred from the claw of the impression cylinder 58a to the claw of the next impression cylinder 58b, and is wound around the impression cylinder 58b to move between the blanket cylinder 59b and the same. In the part, the plate cylinder 60 and the blanket cylinder 59b have one
The color pattern is transferred. 1 each for both sides
The sheet 56 on which the color printing is completed is transferred from the impression cylinder 58b to the intermediate cylinder 55a and the intermediate cylinder 55b juxtaposed to the intermediate cylinder 55a, and is then delivered to the claws of the impression cylinder 58c of the next printing unit 54. Subsequently, on the way of winding the impression cylinder 58c and moving between the blanket cylinder 59c, the plate cylinder 60,
The second color picture is transferred to the surface of the sheet 56 via the blanket cylinder 59c. Next, the sheet 56 is directly transferred from the claw of the impression cylinder 58c to the claw of the next impression cylinder 58d,
The impression cylinder 58d is wound up, and a second color pattern is transferred to the back surface via the lower plate cylinder 60 and blanket cylinder 59d.
Thereafter, similarly, the sheet 56 is sequentially transferred to the downstream front and back printing unit 54 by the transfer of the sheet 56, and the sheet 56 is transferred.
The upper surface is printed in four colors, and the lower surface is printed in four colors. The sheet 56 on which predetermined printing has been completed by the above procedure is delivered to the chain gripper 63 of the endless chain 62 provided in the paper discharge unit 61, is conveyed to the sheet stacking device 64, and is released by the chain gripper 63. The sheets are sequentially stacked on the table 65. [0006] The printing press shown in FIG. 6 is provided with general printing devices 71 a and 71 b comprising a plate cylinder 60, a blanket cylinder 59 and an impression cylinder 58.
An intermediate cylinder 55 having a claw is arranged and connected between the impression cylinders 58a and 58b in 1a and 71b, and the blanket cylinder 59N of the next printing device 71c is connected to the impression cylinder 58b on the downstream side via the intermediate cylinder 55. It is constituted by connecting. Above the blanket cylinder 59N, a blanket cylinder 59 and a plate cylinder 60 that engage with the blanket cylinder 59N are provided side by side.
Below the blanket cylinder 59N, a plate cylinder 60 that engages with the blanket cylinder 59N is provided. In the printing press having the above-described structure, the sheet 56 sent from a paper feeding device (not shown) is sent to the printing device 71a via the intermediate cylinder, and is wound between the impression cylinder 58a and moves between the blanket cylinder 59 and the printing cylinder 71a. On the way, the first color pattern is first transferred to the front side of the part via the plate cylinder 60 and the blanket cylinder 59 in the same part. Next, the leading end of the sheet 56 is gripped by the claws of the intermediate cylinder 55, and after winding the intermediate cylinder 55, the sheet 56 is transferred to the claws of the impression cylinder 58b of the next printing device 71b. Subsequently, the sheet 56 moves between the impression cylinder 58b and the blanket cylinder 59, where the plate cylinder 6 moves.
0, the second color pattern is transferred to the surface via the blanket cylinder 59. Next, the sheet 56 is transferred to the claws of the intermediate cylinder 55 and further to the claws of the blanket cylinder 59N of the printing device 71c on the downstream side. Subsequently, the sheet 56 moves between the blanket cylinder 59N and the blanket cylinder 59 during the winding traveling of the blanket cylinder 59N, and the plate cylinder 60 and the blanket cylinder 59 are moved by the printing device 71c of the same part.
, The third color printing is performed on the front side. On the other hand, on the back side of the sheet 56, a plate cylinder 60 and a blanket cylinder 59 are provided.
The picture of the first color is transferred via N. The sheet 56 on which predetermined printing has been completed by the above procedure is delivered to the chain gripper 63 of the endless chain 62 provided in the paper discharge unit 61, reaches the sheet stacking device 64, and is sequentially stacked. In this type of printing press, three colors are printed on the front surface of the sheet 56. [0006] In addition, the printing machine shown in FIG. 7, the plate cylinder 60,
A general printing device 71a, 71b composed of a blanket cylinder 59 and an impression cylinder 58 is provided side by side. An intermediate cylinder 55 having claws is arranged between the impression cylinders 58a, 58b in the printing devices 71a, 71b. A single-sided multicolor printing unit 81a is configured by the connection. Then, a single-sided multicolor printing unit 81b having the same structure as described above is installed on the downstream side in the traveling direction of the sheet 56, and both of the single-sided multicolor printing units 81a and 81b are connected via a reversing unit 82 disposed in the middle. Connected. In the printing press having the above structure, the sheet 56 fed from a paper feeding device (not shown) is wound around the impression cylinder 58a of the printing device 71a via the intermediate cylinder, and the blanket cylinder 5
In the course of moving between the first and the second color, the first color pattern is first transferred to the front surface of the same portion via the plate cylinder 60 and the blanket cylinder 59. Next, the leading end of the sheet 56 is gripped by the claws of the intermediate cylinder 55, and after winding the intermediate cylinder 55, the sheet 56 is transferred to the claws of the impression cylinder 58b of the next printing device 71b. It moves between 58b and the blanket cylinder 59, and the second color pattern is transferred to the front side of the same via the plate cylinder 60 and the blanket cylinder 59 at the same position. The sheet 56 on which the multi-color printing on the front side has been completed is transported from the impression cylinder 58b to the reversing unit 82, and after the reversing unit 82 reverses the front and back, the impression cylinder 5 of the next printing device 71c.
Delivered to the nail 8c. Thereafter, multicolor printing is performed on the back side in the same process as that performed by the front side multicolor printing unit 81a. The sheet 56 on which predetermined printing has been completed by the above procedure is delivered to the chain gripper 63 of the endless chain 62 provided in the paper discharge unit 61, reaches the sheet stacking device 64, and is sequentially stacked. The printing apparatus is provided with an ink supply device for supplying ink to the plate cylinder 60 and a fountain solution supply device for supplying fountain solution, but they are not shown. However, in a printing press of the type shown in FIG. 5 , the pawl of the impression cylinder 58
Since the sheet 56 is directly transferred to the nails and the printing is alternately performed on the front side and the back side, the drying time of the ink is short, and the ink in the undried state is transferred and adhered to the next impression cylinder 58. There is a problem that print quality is deteriorated, for example, the printing surface is stained. Moreover, during printing operation,
At the same time, since the grip of the sheet 56 is changed, there is a problem that printing unevenness or the like occurs. Further, the printing press of the type shown in FIG. 6 has a drawback that only one color can be printed on the back side surface of the sheet 56 because only one set of the back side printing unit is provided. Furthermore, the figure
In the printing machine of the type shown in FIG. 7 , a reversing unit (mechanism) 82 is provided in the middle of printing, and the sheet 56 is turned upside down so that printing is performed on both sides. Since a grip margin is required, there is a problem that the effective printing dimension in the vertical direction is reduced, and furthermore, there is a drawback that double-sided printing on cardboard cannot be performed. The present invention has been made in view of such circumstances, and has as its object to perform multicolor printing on both the front and back surfaces of various types of sheets, and to perform printing such as ink stains and printing unevenness. An object of the present invention is to provide a sheet-fed double-sided printing press capable of reducing surface quality deterioration. [0010] In order to solve the above-mentioned problems of the prior art, according to the first aspect of the present invention, an intermediate cylinder having a claw is provided between a printing apparatus and a printing apparatus. In the sheet-fed offset printing press, a plurality of first printing apparatuses including a plate cylinder, a blanket cylinder having no sheet grippers and an impression cylinder having a sheet grippers, a plate cylinder,
Plurality of second printing apparatuses including a blanket cylinder having a sheet holding claw and an impression cylinder having no sheet holding claw
And the first printing device and the second printing device
An intermediate cylinder unit consisting of three intermediate cylinders is placed between
The space between the first printing device and the space between the second printing devices is
A first printing device connected to each other via an intermediate cylinder;
Between the intermediate printing unit and the second printing device.
By connecting to each other via the torso, the front side of the seat
And multi-color printing on one side of the back side
And apply multi-color printing on the other side in the following line.
Make up. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;
It will be described in detail based on. FIG . 1 shows a single-wafer sheet according to a first embodiment of the present invention.
Theory showing the overall structure (cylinder arrangement) of the fset printing press
FIG. 2 and FIG. 2 are features of the sheet-fed offset printing press of the present embodiment.
It is explanatory drawing which shows the structure (cylinder arrangement) of a part. FIG.
Is installed on the floor
It is a double-sided printing machine, and a second mark is provided along the traveling direction of the sheet 3.
Printing unit, two back side printing units 2a and back side printing
Unit 2b and two front-surface printing units that are the first printing device.
The knit 1a and the front side printing unit 1b are sequentially arranged side by side.
Between these adjacent back side printing units 2a and 2b.
And intermediate between the front printing units 1a and 1b with claws
A cylinder 4 is provided and connected to each other via the intermediate cylinder 4.
I have. The front printing unit 1 includes a sheet holding unit.
Blanket cylinder 5 without claws and sheet holding claws (fig.
(Not shown) and a plate cylinder 7.
Above the impression cylinder 6N.
The printing cylinder 5 and the plate cylinder 7 are arranged side by side. In addition, the back side
The printing unit 2 has a sheet holding claw (not shown).
Blanket cylinder 5N and impression cylinder without sheet holding claws
6 and a plate cylinder 7, and the blanket cylinder
5N, an impression cylinder 6 that engages with the impression cylinder 5N is provided.
Below the blanket cylinder 5N, a plate cylinder 7 that engages with the blanket cylinder 5N is provided.
It is arranged. And, the intermediate body 4 having the above-mentioned claw,
Middle of bracket body 5N with claws and impression cylinder with claws
Bracket with claws, arranged side by side in the middle of 6N
The cylinder 5N and the impression cylinder 6N
The trunk 6N and the bracket trunk 5N are connected to each other.
The intermediate cylinder 4 may be a single cylinder (same diameter cylinder) or
May be constituted by a double cylinder (the cylinder diameter is a double diameter of the plate cylinder). That is, the printing machine according to the present embodiment has a sheet
Along the traveling direction of the three two back side printing units 2a, 2
b are arranged side by side on the upstream side, and the back side printing unit 2 b
Two front side printing units 1a and 1b are arranged side by side
Are located. In the printing press according to the present embodiment,
With blanket cylinder 5N and impression cylinder 6N
By arranging and connecting the shells 4 to each other,
After applying the multicolor printing on the back side of the
Receiving the sheet 3 on the impression cylinder 6N with claws connected side by side
Hand-over and multi-color printing on both sides for multi-color printing on both sides.
It is made to be. In addition, the back side printing unit 2a
On the upstream side, the sheet 3 is fed to the printing press of the present embodiment.
A paper device (not shown) is provided, and the front side printing unit 1b is provided.
A paper discharge unit 8 is provided on the downstream side of. This paper discharge unit 8
The endless chain 9, chain gripper 10 and
A sheet stacking device 12 having a cable 11
You. Moreover, sheet-fed offset printing of the present embodiment
As shown in FIG. 2, the second printing unit 2b
And two intermediate cylinders between the first color front printing unit 1a and
4, 4 are additionally arranged, and the installation site of the intermediate body 4
Is configured as an intermediate cylinder unit 4p including three intermediate cylinders 4.
Has been established. Therefore, the back side printing unit 2b and the front side
With the surface printing unit 1a via the intermediate cylinder unit 4p
Linked to each other. The printing press according to the present embodiment thus configured
, A sheet fed from a sheet feeding device (not shown)
3 is a back side printing unit through an intermediate cylinder 13 as shown in FIG.
The blanket cylinder 5N
While moving between the impression cylinder 6 and the plate cylinder 7,
First, the pattern of the first color is transferred to the back through the torso 5N.
You. Next, the tip of the sheet 3 is gripped by the claws of the intermediate cylinder 4.
After the intermediate cylinder 4 is wound and run, the next back side printing is performed.
Delivered to the claws of the blanket cylinder 5N of the unit 2b
It moves between the impression cylinder 6 and the blanket cylinder 5N, and
And 2 on the back side through the plate cylinder 7 and the blanket cylinder 5N.
The color pattern is transferred. Subsequently, the sheet 3 is provided with a blanket cylinder 5.
Transfer from the claws of N to the claws of the intermediate trunk 4 of the intermediate trunk unit 4p
After the three intermediate cylinders 4 are wound and run, the next surface printing is performed.
Sent to the unit 1a and delivered to the claws of the impression cylinder 6N
To move between the impression cylinder 6N and the blanket cylinder 5,
On the way through the plate cylinder 7 and blanket cylinder 5
The color pattern is transferred. Next, the sheet 3 is applied to the impression cylinder 6.
It is delivered from the claws of N to the claws of the intermediate body 4, and the intermediate body 4 is
After winding and running, the impression cylinder 6N of the next front side printing unit 1b
Between the impression cylinder 6N and the blanket cylinder 5
On the way of movement, it passes through plate cylinder 7 and blanket cylinder 5
The pattern of the second color is transferred to the surface of. According to the above procedure
The sheet 3 on which the regular printing has been completed is provided in the paper discharge unit 8.
Delivered to the chain gripper 10 of the endless chain 9
After being transported to the sheet stacking device 12, the
Stacked sequentially on the table 11 by release from the hopper 10
Will be forced to do so. In the printing machine of the present embodiment, the intermediate cylinder unit
Running of sheet 3 after multi-color printing on the back side is completed by 4p
Drying time is longer because the line path can be extended
Not only can it be set well, but also a dryer
(Heating roller, etc.)
The front side can be printed with the back side of
As a result, the printed surface becomes dirty due to the adhesion of the ink.
Troubles such as printing, and prevent print quality from deteriorating.
it can. FIG . 3 shows a single-wafer sheet according to a second embodiment of the present invention.
Theory showing the overall structure (cylinder arrangement) of the fset printing press
FIG. 4 shows the features of the sheet-fed offset printing press according to the present embodiment.
It is explanatory drawing which shows the structure (cylinder arrangement) of a part. FIG.
Is installed on the floor
It is a two-sided printing machine.
Front side printing unit 1a and front side printing unit 1b, 2
Back printing unit 2a and back printing unit 2b
Are arranged side by side, and these adjacent surface printing units
And between the back side printing units 2a and 2b.
Are disposed, and each other is disposed through the intermediate cylinder 4.
It has been consolidated in. That is, the printing machine of the present embodiment
3 front printing units 1a, 1
b are arranged side by side on the upstream side, and the front side printing unit 1b
Two back side printing units 2a and 2b are arranged side by side
Are located. In the printing press according to the present embodiment,
With a press drum 6N and a blanket cylinder 5N and claws
By connecting the trunks 4 side by side, first of all,
After performing multi-color printing on the surface, the claws connected side by side from the intermediate cylinder 4
Hand over sheet 3 to blanket cylinder 5N
By performing multi-sided printing, it is possible to perform multi-sided printing on both sides.
It has become. Other configurations are the same as those of the first embodiment.
Is the same as In addition, sheet-fed offset printing of the present embodiment
As shown in FIG. 4, the second color front printing unit 1 b
And two intermediate cylinders between the first color back printing unit 2a
4, 4 are additionally arranged, and the installation site of the intermediate body 4
Is configured as an intermediate cylinder unit 4p including three intermediate cylinders 4.
Has been established. Therefore, the front side printing unit 1b and the back side
With the surface printing unit 2a via the intermediate cylinder unit 4p
Linked to each other. The printing press of the present embodiment thus configured
, A sheet fed from a sheet feeding device (not shown)
3 is a surface printing unit through an intermediate cylinder 13 as shown in FIG.
And the impression cylinder 6N is wound around the blanket 1a.
On the way between the plate cylinder 7 and the blanket
First, the first color pattern is transferred to the surface through the
You. Next, the tip of the sheet 3 is gripped by the claws of the intermediate cylinder 4.
After the intermediate cylinder 4 is wound and run, the next surface printing is performed.
It is delivered to the claws of the impression cylinder 6N of the unit 1b.
Between the blanket cylinder and the blanket cylinder.
7 and a second color picture on the surface through blanket cylinder 5
Is transferred. Subsequently, the sheet 3 is moved from the pawl of the impression cylinder 6N.
It is delivered to the claws of the intermediate trunk 4 of the intermediate trunk unit 4p , and three
After winding the intermediate cylinder 4 of
a to the blanket cylinder 5N
To move between the blanket cylinder 5N and the impression cylinder 6,
On the way through the plate cylinder 7 and blanket cylinder 5N
The pattern of the first color is transferred. Next, the sheet 3
The nail is transferred from the claws of the intermediate cylinder 5N to the claws of the intermediate cylinder 4, and
After winding the intermediate cylinder 4 of
b into the blanket cylinder 5N
It moves between the cylinder 5N and the impression cylinder 6, and on the way, the plate cylinder 7 and
The second color pattern is rolled on the back side through the blanket cylinder 5N
Will be copied. Sheets that have been printed as specified by the above procedure
3 is provided in the paper discharge unit 8 as in the first embodiment.
Delivered to the chain gripper 10 of the endless chain 9
To the sheet stacking device 12 where the sheets are sequentially stacked.
And In the printing machine of the present embodiment, the intermediate cylinder unit
After the multicolor printing on the front side is completed by 4p, the sheet 3 runs
Drying time is longer because the line path can be extended
Not only can it be set well, but also a dryer
(E.g. heating roller)
A function improvement similar to that of the first embodiment shown in FIG.
You. The embodiments of the present invention have been described above.
However, the present invention is not limited to the above-described embodiments.
Therefore, various modifications may be made without departing from the gist of the present invention.
Shapes and changes can be made. For example, as described above
In the sheet-fed double-sided printing press in the form, two surface printing units 1
a, 1b and two back side printing units 2a, 2b
It is configured so that each printing unit is 3 or more
They may be configured in combination. As described above, sheet-fed double-sided printing according to the present invention
The machine is a blanket cylinder without plate cylinder and sheet holding claws
Printing consisting of an impression cylinder having a sheet holding claw and a sheet holding claw
Brans with multiple units , plate cylinders and sheet grippers
Consists of a ket cylinder and an impression cylinder without sheet holding claws
A plurality of second printing apparatuses, and the first printing apparatus
An intermediate section comprising three intermediate cylinders between the first printing apparatus and the second printing apparatus
A cylinder unit disposed between the first printing device and the
When two printing devices are connected to each other via the intermediate cylinder
In both cases, the space between the first printing device and the second printing device is
Connected to each other via the intermediate cylinder of the intermediate cylinder unit
Depending on either the front or back side of the seat
Multi-color printing on the other side, and the subsequent side on the other side
Is configured to perform multi-color printing with
Various effects can be obtained. (1) Multi-color printing on both sides of the sheet
Can be. (2) Since there is no sheet reversing mechanism, thick paper (sheet
G) can be printed. Also this
The print size of the back side of the seat in the vertical direction is
Can be the same. (3) Between the first printing unit and the second printing unit
In order to connect the two units by placing
It is possible to extend the route of the
Ink drying time can be sufficient, and ink stains
It is possible to reduce deterioration in the quality of the printing surface. (4) After the end of printing in the previous process, change the front edge of the sheet
Operation, the quality of the printed surface
I can do it.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual diagram showing an overall structure example of a sheet-fed offset printing press according to a first embodiment of the present invention. FIG. 2 is a conceptual diagram illustrating a structural example of a characteristic portion of the sheet-fed offset printing press according to the first embodiment of the present invention. FIG. 3 is a conceptual diagram illustrating an example of the overall structure of a sheet-fed offset printing press according to a second embodiment of the present invention. FIG. 4 is a conceptual diagram showing a structure of a characteristic portion of a sheet-fed offset printing press according to a second embodiment of the present invention . FIG. 5 shows a structural example of a general sheet-fed offset printing press.
It is a conceptual diagram. FIG. 6 shows a structural example of another general sheet-fed offset printing press.
FIG. FIG. 7 shows the structure of another general sheet-fed offset printing press.
It is a conceptual diagram showing an example. [Description of Signs] 1 Front printing unit 2 Back printing unit 3 Sheet 4 Intermediate cylinder 4p Intermediate cylinder unit 5 Blanket cylinder 6 Impression cylinder 7 Plate cylinder 8 Discharge unit 9 Endless chain 10 Chain gripper 11 Table 12 Sheet stacking device

Claims (1)

(57) [Claim 1] In a sheet-fed offset printing press provided with an intermediate cylinder having a claw between printing devices,
A first printing apparatus comprising a plate cylinder, a blanket cylinder having no sheet holding claws, and an impression cylinder having sheet holding claws ;
A second unit including a plurality of units , a plate cylinder, a blanket cylinder having a sheet gripper, and an impression cylinder having no sheet gripper.
A plurality of printing devices are arranged side by side, and the first printing device and the
Intermediate cylinder unit consisting of three intermediate cylinders between the second printing device
And a second printing device between the first printing device and the second printing device.
While connecting between the devices via the intermediate cylinder,
The intermediate between the first printing device and the second printing device
By connecting them to each other via the intermediate trunk of the trunk unit
To the front or back side of the seat.
Multi-color printing in advance and multi-color printing on the other side
A sheet-fed double-sided printing press characterized by performing color printing .