JPH1199609A - Perforated perfect and sheet-feed printing method and printing mechanism therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To do perfect printing and perforation simultaneously by forming a perforation part between a top face printing part or a back face printing part and a delivery part and perforating in the continuous process of perfect printing. SOLUTION: A sheet P is sent from a delivery cylinder 4 to an impression cylinder 11a of a first surface printing unit 5a to be subjected to the first color printing on its surface. Next, the sheet P is sent to an impression cylinder 12a of a first back printing unit 6a to be subjected to the first color printing on its back. Besides, a delivery cylinder installed in parallel with the terminal impression cylinder 12a is installed, is a delivery chain 22 with a gripper driven by a chain wheel 21. The sheet P after printing is discharged from the impression cylinder 12a onto a delivery base 23 through the delivery cylinder by the chain 22. An apparatus with perforations is installed in the back printing unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided printing press, and more particularly to a method for simultaneously performing double-sided printing and perforation processing and a printing mechanism thereof.

[0002]

2. Description of the Related Art Heretofore, as this type of sheet-fed offset printing press, a so-called reversing double-side printing method and a BB double-side printing method have been known. As the reversing type double-sided printing method, for example, as shown in Japanese Patent Publication No. 1-56672, a reverse printing unit, a front stamping unit, a paper reversing unit, and the like are provided. Is disclosed in which the sheet is reversed by a paper reversing unit after being printed, transferred to the front side printing unit, and printed on the surface of the sheet by the front side printing unit. In the BB type double-sided printing system, a plurality of blanket cylinders and an impression cylinder with a rubber blanket attached thereto are alternately arranged in the horizontal direction, as shown in Japanese Patent Application Laid-Open No. 58-147364, for example. The printing unit is constructed by providing a plate cylinder, an inking mechanism, a dampening mechanism, etc. at the upper part of each blanket cylinder and the lower part of each impression cylinder, respectively, and a sheet is transported by providing a gripper at each blanket cylinder. A configuration is disclosed in which printing of a plurality of colors is simultaneously performed on both surfaces during the printing. As another method, for example, as shown in Japanese Patent Publication No. 3-21346, two pairs of plate cylinders and blanket cylinders arranged side by side have a diameter three times that of these cylinders and have a paper holding claw. A five-cylinder two-color printing unit is formed by connecting to the impression cylinder, and two sets of printing units are alternately arranged in the vertical direction so that the relative positions of the plate cylinder and the blanket cylinder with respect to the impression cylinder are different from each other. The impression cylinders are connected so that the straight line connecting the axis of the impression cylinder is zigzag, and the paper feeder is located on the lowermost impression cylinder, and the paper ejection device is located on the uppermost impression cylinder. A double-sided printing sheet-fed offset printing press configured to print in two color units on both the front and back sides of a sheet is disclosed. The applicant of the present invention has disclosed a method (see Japanese Patent Application Laid-Open No. Hei 6-336003) in which one or more colors can be printed on each of the front and back surfaces by improving these conventional methods. is there. That is, a surface printing unit including a blanket cylinder, a plate cylinder, and an inking mechanism is provided on an upper portion of an impression cylinder provided with a paper holding claw, and a blanket cylinder, a plate cylinder, and an inking mechanism are provided below the impression cylinder provided with a paper holding claw. And a back-side printing unit comprising: a sheet-fed offset printing press, wherein the front- and back-side printing units are configured for each unit, and the impression cylinders of the respective printing units are arranged in the horizontal direction or with respect to the axis of the impression cylinder. A method of alternately printing the front and back surfaces of the printing paper by connecting them obliquely with each other, or the front and back printing unit is composed of two or more front printing units and two or more back printing units. The printing paper is delivered to the impression cylinder of the first front-side printing unit to perform front-side printing of the first color, and then the printing paper is delivered to the impression cylinder of the first back-side printing unit to perform the first backside printing. Further, a method of performing front and back printing of a plurality of colors by alternately printing the front and back surfaces of the printing paper in the same manner as described above, or the impression cylinder diameter and the plate cylinder and blanket cylinder diameter in the double-sided printing sheet-fed offset printing. Each of the cylinders and the middle is made to be identical and to have a configuration in which two intermediate cylinders are interposed between each unit of the front and back printing units, or a configuration in which the impression cylinder diameter is double the plate cylinder and the blanket cylinder diameter and the intermediate cylinder is not interposed. A new method or printing mechanism has been provided, such as a method in which the cylinder axis of the cylinder is connected in a substantially linear or zigzag manner to alternately print the front and back surfaces of the printing paper.

[0003]

There is a problem to be solved by the present invention in that the conventional method is improved so that printing of double-sided printing and perforation are simultaneously performed.

[0004]

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the above-mentioned problems, and is a double-sided printing system comprising a paper feeding unit, a front side printing unit / back side printing unit, and a paper discharging unit. The perforated double-sided printing sheet, wherein a perforated portion is provided between the front-side printing portion or the back-side printing portion and the sheet discharging portion, and perforation is performed in a continuous process of double-sided printing. To provide a printing method, and to print front and back surfaces including a paper feeding unit for sequentially feeding printing paper and a front printing unit and a back printing unit including an impression cylinder, a blanket cylinder, a plate cylinder, and an inking mechanism. And a perforated section consisting of a vertical perforation equipped with a detachable special unit and a horizontal perforation with a perforated band attached to the horizontal perforation cylinder, and a discharge section for sequentially discharging printing paper Perforation characterized by becoming It is to provide a double-sided printing sheet-fed printing mechanism.

[0005] Furthermore, a blanket cylinder, a plate cylinder and an inking mechanism are provided on the upper part of the impression cylinder provided with a paper holding claw at the perforated portion to form a front printing unit, and the impression cylinder provided with a paper holding claw is provided. A backside printing unit is formed by providing a blanket cylinder, plate cylinder, and inking mechanism at the bottom, and the front side printing unit and the backside printing unit are connected by an impression cylinder constituting each printing unit. An impression cylinder provided with a blanket cylinder, a plate cylinder, and an inking mechanism on an upper part of an impression cylinder provided with a paper holding claw at the perforated portion to form a front surface printing unit and provided with a paper holding claw; At the bottom of the blanket cylinder, plate cylinder,
A perforated double-sided printing sheet in which an inking mechanism is provided to form a back side printing unit, and a plurality of the front side printing unit and the back side printing unit are alternately connected in a horizontal or zigzag direction by an impression cylinder constituting each printing unit. A leaf printing mechanism, wherein a perforated portion is provided with a paper holding claw, and a blanket cylinder, a plate cylinder, and an inking mechanism are provided above the impression cylinder having the same diameter or a double cylinder as the plate cylinder to form a surface printing unit. At the same time, a paper holding claw is provided and a blanket cylinder, a plate cylinder,
An inking mechanism is provided to form a back side printing unit, and the impression cylinders forming the front side printing unit and the back side printing unit are connected in the horizontal direction to form one unit of front and back side printing unit. To make the structure the same as the plate cylinder and blanket cylinder diameter, and to arrange two intermediate cylinders between each of the front and back printing units, or to make the impression cylinder diameter twice as large as the plate cylinder and the blanket cylinder without the intermediate cylinder A perforated double-sided sheet-fed printing mechanism for alternately printing the front and back surfaces of printing paper by connecting the cylinder axes of each cylinder and the intermediate cylinder in a substantially linear or zigzag manner.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention relates to a double-sided printing method comprising a paper feeding unit, a front side printing unit / back side printing unit, and a paper discharging unit. A perforated double-sided sheet-fed printing method in which a perforated section is provided between the paper discharge section and an arbitrary perforation is performed in a continuous process of double-sided printing. And perforation processing can be performed simultaneously and continuously.

An embodiment of the present invention is directed to a front and back surface printing unit including a paper feeding unit for sequentially feeding printing paper, a front printing unit including a pressure cylinder, a blanket cylinder, a plate cylinder, and an inking mechanism, and a back printing unit. A perforated section consisting of a printing section, a vertical perforated section equipped with a detachable special unit, and a horizontal perforated section with a perforated band attached to a perforating cylinder, and a discharge section for sequentially discharging printing paper. Since the perforated double-sided printing sheet-fed printing mechanism is characterized by the fact that the perforated section mechanism is inlined with a conventional double-sided printing sheet-fed printing machine, continuous double-sided printing and sewing can be performed in one process. Eye machining can be performed.

According to an embodiment of the present invention, a blanket cylinder, a plate cylinder, a printing cylinder,
A front printing unit is formed by providing an inking mechanism, and a back printing unit is formed by providing a blanket cylinder, a plate cylinder, and an inking mechanism below the impression cylinder provided with paper holding claws. The printing unit is connected to the printing unit by an impression cylinder constituting each printing unit, and the perforated portion is provided with a blanket cylinder, a plate cylinder, and an inking mechanism above the impression cylinder provided with a paper holding claw. And a blanket cylinder, plate cylinder, and inking mechanism are provided below the impression cylinder provided with paper holding claws to form a back side printing unit, and the front side printing unit and the back side printing unit are configured in each printing unit. A plurality of the impression cylinders are connected alternately in the horizontal or zigzag direction. Further, the perforations are provided inside, paper holding claws are provided, and the diameter is the same as that of the plate cylinder. The blanket cylinder, plate cylinder, and inking mechanism are provided on the upper part of the impression cylinder of the double cylinder to form the surface printing unit, and the paper holding claws are provided and the impression cylinder of the same diameter or the double cylinder as the plate cylinder is provided. A blanket cylinder, plate cylinder, and inking mechanism are provided at the bottom to form a backside printing unit, and the impression cylinders that form the front side printing unit and the backside printing unit are connected horizontally or zigzag to print one unit of front and back sides. A printing cylinder having the same impression cylinder diameter as the plate cylinder and blanket cylinder diameter, and a configuration in which two intermediate cylinders are interposed between each unit of front and back printing units or the impression cylinder diameter is defined as the plate cylinder and blanket cylinder diameter. Since the diameter is doubled and the intermediate cylinder is not interposed, the axis of each cylinder and the intermediate cylinder are connected in a substantially straight line or zigzag shape to alternately print the front and back sides of the printing paper. , Follow Can be added function of perforation forming the functions of a conventional double-sided printing in the duplex printing sheet-fed offset printing press just attaching a perforated basis weight device.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. The present invention relates to Japanese Unexamined Patent Application Publication No.
Since the invention described in Japanese Patent Publication No. 336003 is improved, the description will be made based on each embodiment shown therein.

FIG. 1 is a schematic side view of a double-sided printing sheet-fed offset printing press as a first embodiment showing a perforated double-sided printing sheet-fed printing mechanism of the present invention. As is apparent from this figure, the sheet P piled on the feeder main body 1 is fed to the printing unit A via the feeder board 2, the swing device 3, and the transfer cylinder 4.
And printed on both sides of the sheet P. The printing unit A includes one front printing unit 5a and one back printing unit 6a.
a is provided with a blanket cylinder 7a, a plate cylinder 9a, and a paper holding claw, and is connected to an impression cylinder 11a and an inking mechanism 13a having the same diameter as the plate cylinder 9a. Also, the back side printing unit 6a
Is provided with a blanket cylinder 8a, a plate cylinder 10a, a paper holding claw and a plate cylinder 10a in the same manner as the above-mentioned front side printing unit 5a.
And an inking mechanism 14a having the same diameter as that of the blanket cylinder 8a.
The plate cylinder 10a and the inking mechanism 14a are connected. A feature of the present invention resides in that a perforation device is attached to the conventional double-sided sheet-fed offset printing press configured as described above. The perforation device attached to the present invention is equipped with a conventionally used sewing device, for example, a mechanism that performs a winding operation using a second transfer cylinder as a sewing machine impression cylinder and a detachable dedicated unit. A horizontal sewing machine having a vertical sewing machine mechanism and a third transfer cylinder serving as a horizontal sewing cylinder and a sewing machine band (optional) attached thereto is used.

The double-sided printing sheet-fed offset printing press according to the present invention is configured by connecting the front side printing unit 5a and the back side printing unit 6a formed as described above. In that case, the impression cylinders constituting the printing units 5a, 6a on the front and back sides
11a and 12a are connected in the horizontal direction, and each of the impression cylinders 11a and 12a is connected so that the line connecting the axis of the impression cylinder becomes oblique.
a may be connected. Further, with the above-described configuration, the sheet P is transferred from the transfer cylinder 4 to the impression cylinder 11a of the front surface printing unit 5a, and the printing is performed on the front surface thereof. Printing is performed. Reference numeral 20 denotes a delivery cylinder connected to the impression cylinder 12a, reference numeral 21 denotes a sprocket, reference numeral 22 denotes a delivery chain with grippers driven by the sprocket 21, and the sheet P after printing is completed. The paper is discharged onto a paper discharge table 23 by a chain 22 with a gripper through the. In this embodiment, the impression cylinder 11a of the front printing unit 5a and the impression cylinder 12a of the back printing unit 6a are described as having the same diameter as the plate cylinders 9a and 10a.
In some cases, an impression cylinder having a diameter twice or more is used. Further, the back side of the back side printing unit 6a may be used, and the front side printing unit 5a may be connected to the back side of the back side printing unit 6a. In this embodiment, the perforation device is attached to the front side printing unit, but the same operation and effect can be obtained by attaching the perforation unit to the back side printing unit.

FIG. 2 is a schematic side view of a two-sided four-color printing sheet-fed offset printing press as a second embodiment showing a perforated double-sided printing sheet-fed printing mechanism according to the present invention. As is clear from this figure, the sheets P piled on the feeder body 1 are:
The sheet P is fed to the printing unit B via the feeder board 2, the swing device 3, and the transfer cylinder 4, and printed on each of the front and back surfaces of the sheet P in four colors. The printing unit B includes four front printing units 5a to 5d and four back printing units 6a to 6d.
6d, and the first to fourth color front side printing units 5a to 5d are the front side printing units 5a of the first embodiment.
The back printing units 6a to 6d of the first to fourth colors are formed in the same manner as the back printing unit 6a of the first embodiment, except that the impression cylinders 11a and 12a have twice the diameter of the plate cylinders 9a and 10a. The explanation is omitted.

A two-sided, four-color printing sheet-fed offset printing press according to a second embodiment of the present invention comprises front side printing units 5a, 5b, 5c, 5d and back side printing units 6a, 6b, 6c, 6d formed as described above. Are alternately connected, for example, the first color front side printing unit 5a, the first color rear side printing unit 6a, and then the second color front side printing unit 5b. In this case, the impression cylinders 11a to 11d and 12a to 12d constituting the printing units 5a to 5d and 6a to 6d on the front and back sides are connected in a horizontal direction, and are configured by connecting the impression cylinder axes in a substantially linear manner. You. However, each of the impression cylinders 11 is so arranged that the line connecting the axis of the impression cylinder has a zigzag shape.
a to 11d and 12a to 12d may be connected.

With the above construction, the sheet P is transferred from the transfer cylinder 4 to the impression cylinder 11a of the first front-side printing unit 5a, and the first color printing is performed on the front side thereof. And the first color printing is performed on the back surface of the impression cylinder 12a. Then, as described above, the second to fourth
The front side printing units 5b to 5d and the second to fourth back side printing units 6b to 6d alternately print the second to fourth colors on both the front and back sides of the sheet P.

Reference numeral 20 denotes a delivery cylinder connected to the last impression cylinder 12a, 21 denotes a sprocket, 22 denotes a delivery chain with a gripper driven by the sprocket 21, and the sheet P after printing is completed. From 12a, the paper is discharged onto a paper discharge table 23 by a chain 22 with a gripper via a delivery cylinder 20.
Also, in this embodiment, a perforation device is provided similarly to the above embodiment, but the description is omitted because the content is the same.

FIG. 3 is a schematic side view of a double-sided two-color printing sheet-fed offset printing press as a third embodiment showing a perforated double-sided printing sheet-fed mechanism according to the present invention. As is clear from this figure, the first and second front side printing units 5 of the second embodiment.
a.5b and a printing unit C similar to the first and second back printing units 6a and 6b, and the impression cylinders 11a, 11b, 12a, and 12b forming the printing unit are connected in a horizontal direction. is there. The other components are the same as in the second embodiment, and a description thereof will be omitted.

Further, in this embodiment, a perforation device is additionally provided as in the above embodiment, but the description is omitted because the contents are the same. FIG. 4 is a schematic side view of a double-sided four-color printing sheet-fed offset printing press which is a fourth embodiment showing a perforated double-sided printing sheet-fed mechanism according to the present invention. In this case, the printing unit D also has the four surface printing units 5a to 5a to
The same unit as 5d and the four back surface printing units 6a to 6d is used. The first color front side printing unit 5a follows the first color rear side printing unit 6a, and the second
The printing units 5a to 5d and 6a to 6d of four colors for each of the front and back sides are alternately connected to each other, such as a back surface printing unit 6b for a color, and the impression cylinders 11a to 11 that form the printing unit.
d, 12a to 12d are connected in the horizontal direction.

With this configuration, the sheet P can be transferred from the feeder board 2 by the swing device 3 without the transfer drum 4.
The first color printing is transferred directly to the impression cylinder 12a of the first backside printing unit 6a, and the first color printing is performed on the back surface thereof. The first color printing is then transferred to the impression cylinder 11a of the first front side printing unit 5a. Is done. Thereafter, printing of the second to fourth colors is performed alternately on the front and back surfaces of the sheet P in the same manner as described above. Impression cylinder 11
Since the rotation of d is opposite to the rotation of the delivery chain 22 with the gripper, the sheet P on which the printing of the fourth color has been completed is directly transferred to the chain 22 with the gripper even without the delivery cylinder 20, and The paper is ejected on top. The other components are the same as those of the second embodiment, and the description is omitted. Further, in this embodiment, a perforation device is additionally provided similarly to the above-described embodiment, but the description thereof is omitted because the content is the same.

FIG. 5 is a schematic side view of a double-sided two-color sheet-fed offset printing press as a fifth embodiment showing a perforated double-sided sheet-fed printing mechanism according to the present invention. In this case, the printing unit E is also the first and second back side printing units 6 of the fourth embodiment.
a.6b and the first and second front side printing units 5a and 5b, and the impression cylinders 11a.
11b, 12a and 12b are connected in the horizontal direction. The other components are the same as those of the fourth embodiment, and the detailed description is omitted. This embodiment is also provided with a perforation device as in the previous embodiment, but the description is omitted because the content is the same.

As shown in FIGS. 1, 2, 3, 4 and 5, there are spaces 18a to 18d provided between the back side printing units 6a to 6d.
6d can be maintained and other operations can be performed. FIG. 6 is a schematic side view of a double-sided four-color printing sheet-fed offset printing press which is a sixth embodiment showing a perforated double-sided printing sheet-fed printing mechanism according to the present invention. As is clear from this figure, the sheet P piled on the feeder main body 1 is fed to the printing unit via the feeder board 2, the swing device 3, and the transfer cylinder 4, and is printed on both sides of the sheet P. Each of the four colors is printed.

Hereinafter, the first color front printing unit 5a and the rear printing unit 6a for the first color will be described for convenience. The front side printing unit 5a is provided with a blanket cylinder 7a, a plate cylinder 9a, and an impression cylinder 11 provided with a paper holding claw and having the same diameter as the plate cylinder 9a.
a blanking cylinder 7a, plate cylinder 9a, and inking mechanism 13a above the impression cylinder 11a.
Are connected. The back printing unit 6a includes a blanket cylinder 8a and a plate cylinder 10 like the front printing unit 5a.
a and an impression cylinder having a paper holding claw and having the same diameter as the plate cylinder 10a.
12a, an inking mechanism 14a, etc., and a blanket cylinder 8a, a plate cylinder 10a and an inking mechanism 14a are provided below the impression cylinder 12a.
a are connected. Further, similarly to the above-described embodiment, the back printing unit 6 is provided on the rear side of the impression cylinder 11a of the front printing unit 5a.
1a as a unit by connecting the impression cylinder 12a of
The color-grain printing unit G is constituted, and the second to fourth color-grain printing units H to J are configured in the same manner as the first-color printing unit G for the first color. In this embodiment, a perforation device is provided similarly to the above embodiment, but the description is omitted because the content is the same.

The double-sided, four-color printing sheet-fed offset printing press constructed according to the present invention is provided with two of the first to fourth color front and back printing units G to J formed as described above, respectively. It is connected in the horizontal direction by the intermediate cylinders 17 and 18. In this case, the impression cylinders 11a to 11 that constitute the printing units 5a to 5d and 6a to 6d on the front and back sides, respectively.
The first to fourth color front and back printing units G to J are connected such that the shaft axes of d, 12a to 12d and the six intermediate cylinders 17 and 18 are substantially linear. However, the first to fourth color front and back printing units G to J may be connected so that the line connecting the trunk axis becomes zigzag.

With the above arrangement, the sheet P is transferred from the transfer cylinder 4 to the impression cylinder 11a of the front printing unit 5a constituting the first color front and back printing unit G, and the first color printing is performed on the front surface thereof. And then the impression cylinder 12 of the back side printing unit 6a.
a, and the first color is printed on the back surface. Thereafter, the sheet P is sequentially sent to the second color front and back printing unit H via the two intermediate cylinders 17 and 18 and further to the third and fourth color front and back printing units I and J. The second to fourth colors are printed on the front and back surfaces, respectively. In addition,
20 is a delivery cylinder connected to the last impression cylinder 12d, 21 is a sprocket, 22 is a delivery chain with grippers driven by the sprocket 21, and the sheet P after printing is completed is the last impression cylinder 12d. The paper is then discharged onto a paper discharge table 23 by a delivery chain 22 with grippers via a delivery cylinder 20.

FIG. 7 is a schematic side view of a double-sided two-color printing sheet-fed offset printing press as a seventh embodiment showing a perforated double-sided printing sheet-fed printing mechanism according to the present invention. The printing unit in this case also uses the first and second color front and back printing units GH of the sixth embodiment, and connects the impression cylinders 11a, 12a, 11b, 12b and the intermediate cylinders 17, 18 in the horizontal direction. It is configured. As a result, the sheet P is sequentially delivered to the impression cylinders 11a and 12a, the two intermediate cylinders 17 and 18, and the impression cylinders 11b and 12b. Can be. In this embodiment, a perforation device is provided similarly to the above embodiment, but the description is omitted because the content is the same.

FIG. 8 is a schematic side view of a double-sided four-color printing sheet-fed offset printing press according to an eighth embodiment showing a perforated double-sided printing sheet-fed printing mechanism according to the present invention. Front side printing units 5a to 5d and back side printing units 6a to 6 in this case
d is the same as that of the sixth embodiment, and the front side printing unit 5a is provided on the rear side of each of the back side printing units 6a to 6d.
To 5d to form the first to fourth color front / back printing units G1, H1, I1, J1.
It is constructed by connecting two intermediate cylinders 17 and 18 between J1 in the horizontal direction. As a result, the sheet P is transferred from the transfer cylinder 4 to the impression cylinder 12a of the back printing unit 6a constituting the first color front and back printing unit G1, and the first printing is performed on the back, and then the front printing unit It is delivered to the impression cylinder 11a of 5a, and the first color printing is performed on the surface. Thereafter, the sheet P is passed through the two intermediate cylinders 17 and 18 to the second, third and fourth color front and back printing units H1 and H2.
The paper is sequentially fed to I1 and J1, and the second to fourth colors are printed on the front and back surfaces, respectively. Since the rotation of the impression cylinder 11d is opposite to the rotation of the delivery chain 22 with the gripper, the sheet P on which the printing of the fourth color has been completed is directly transferred to the chain 22 with the gripper without the delivery cylinder 20 and discharged. The sheet is discharged onto the table 23. The other components are the same as those of the sixth embodiment, and the description is omitted. Also, in the present embodiment, a perforation mechanism is additionally provided as in the previous embodiment, but the description is omitted because the content is the same.

FIG. 9 is a schematic side view of a double-sided two-color sheet-fed offset printing press as a ninth embodiment showing a perforated double-sided sheet-fed printing mechanism according to the present invention. The printing unit in this case also uses the first and second color front and back printing units G1 and H1 of the eighth embodiment, and the impression cylinders 12a, 11a, 12b, and 11b.
And the intermediate cylinders 17 and 18 are connected in the horizontal direction. As a result, the sheet P is sequentially delivered to the impression cylinders 12a and 11a, the two intermediate cylinders 17 and 18, and the impression cylinders 12b and 11b. Can print. The other components are the same as in the eighth embodiment, and a description thereof will not be repeated. Also, in the case of this embodiment, a perforation device is provided similarly to the above embodiment, but the description is omitted because the content is the same.

As shown in FIGS. 6, 7, 8 and 9, the impression cylinders 11a to 11d and 12a to 12d of the front printing units 5a to 5d and the back units 6a to 6d and the two intermediate cylinders 17 and 18 are provided.
When they are connected in the horizontal direction with the same diameter as the plate cylinders 9a to 9d and 10a to 10d, the overall height of the printing press can be minimized. Also, one unit of front and back printing units G and G1 is configured by the front printing unit 5a and the back printing unit 6a, and a plurality of front and back printing units H similarly configured.
・ H1, I, I1, J, and J1 are each two intermediate cylinders 17.
Since the connection is made via 18, maintenance and other operation spaces are formed between the plurality of front side printing units 5a to 5d and between the back side printing units 6a to 6d.

[0028]

Since the present invention is configured as described above, it has many effects as follows. A) The method of the present invention has many advantages over the conventional simple double-sided printing method, since printing of double-sided printing and perforation processing can be performed simultaneously and in a continuous process. A. The mechanism of the present invention is to provide a perforation device on one of the front and back printing units of a conventional double-sided printing sheet-fed printing press, so that printing of double-sided printing and perforation processing are performed in-line to form one process. Can be performed continuously. C) The present invention has a unique effect of the conventional method, for example, that the printing can be performed on the front and back sides of a sheet because it is delivered by the impression cylinder of the printing unit on the front and back sides, and the overall height of the printing machine is compared. It is particularly effective when designing large sheets, because the overall height of the printing press can be reduced with the same printing dimensions, between the front side printing units and between the back side printing units. There are effects such as providing a space for maintenance and other operations.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a first embodiment showing a perforated double-sided printing sheet-fed printing mechanism of the present invention.

FIG. 2 is a schematic side view of the second embodiment of the present invention shown in FIG.

FIG. 3 is a schematic side view of the third embodiment of the present invention shown in FIG.

FIG. 4 is a schematic side view of the fourth embodiment of the present invention shown in FIG.

FIG. 5 is a schematic side view of the fifth embodiment of the present invention shown in FIG.

FIG. 6 is a schematic side view of the sixth embodiment of the present invention shown in FIG.

FIG. 7 is a schematic side view of the seventh embodiment of the present invention shown in FIG. 1;

FIG. 8 is a schematic side view of the eighth embodiment of the present invention shown in FIG.

FIG. 9 is a schematic side view of the ninth embodiment of the present invention shown in FIG. 1;

[Explanation of symbols]

5a, 5b, 5c, 5d Front side printing unit 6a, 6b, 6c, 6d Back side printing unit 7a, 7b, 7c, 7d Front side printing unit 5a-5
d blanket cylinder 8a, 8b, 8c, 8d Back side printing units 6a-6
d blanket cylinder 9a, 9b, 9c, 9d Surface printing units 5a-5
d cylinder 10a, 10b, 10c, 10d Backside printing units 6a-6
d plate cylinders 11a, 11b, 11c, 11d impression cylinders 12a, 12b, 12c, 12d impression cylinders 13a, 13b, 13c, 13d surface printing units 5a to 5d
d inking mechanism 14a, 14b, 14c, 14d Backside printing units 6a to 6d
d inking mechanism 15a, 15b, 15c, 15d Surface printing units 5a to 5d
d Water supply mechanism 16a, 16b, 16c, 16d Back side printing units 6a to 6d
d water supply mechanism W perforation device

Claims (5)

[Claims] 1. A double-sided printing method comprising a sheet feeding unit, a front side printing unit / back side printing unit, and a sheet discharging unit, wherein a sewing machine is provided between the front side printing unit or the back side printing unit and the sheet discharging unit. A perforated double-sided sheet-fed printing method comprising providing a perforated portion and performing an optional perforation in a continuous process of double-sided printing. 2. A paper feed unit for sequentially feeding printing paper, an impression cylinder,
Front and back printing parts consisting of a front printing part and a back printing part composed of a blanket cylinder, plate cylinder, and inking mechanism, and a vertical perforated and horizontal sewing cylinder equipped with a detachable special unit. A perforated double-sided sheet-fed printing mechanism characterized in that the perforated portion is formed by a horizontal perforation and a discharge portion for sequentially discharging printing paper. 3. A front printing unit is formed by providing a blanket cylinder, a plate cylinder, and an inking mechanism on an upper part of an impression cylinder having the perforated portion provided with a paper holding claw, and a paper holding claw provided. The blanket cylinder, plate cylinder,
The perforated double-sided printing sheet printing mechanism according to claim 2, wherein an inking mechanism is provided to form a back side printing unit, and the front side printing unit and the back side printing unit are connected by an impression cylinder included in each printing unit. 4. A front printing unit is formed by providing a blanket cylinder, a plate cylinder, and an inking mechanism on an upper part of an impression cylinder having the perforated portion and a paper holding claw provided therein, and a paper holding claw provided. The blanket cylinder, plate cylinder,
3. The printing apparatus according to claim 2, wherein an inking mechanism is provided to form a back side printing unit, and the front side printing unit and the back side printing unit are alternately connected in a horizontal or zigzag direction by an impression cylinder included in each printing unit. Perforated double-sided printing sheet-fed printing mechanism. 5. A surface printing unit comprising a paper holding claw provided inside the perforated portion and a blanket cylinder, a plate cylinder, and an inking mechanism provided above an impression cylinder having the same diameter or a double diameter as the plate cylinder. While forming, a paper holding claw is provided and a blanket cylinder, a plate cylinder, and an inking mechanism are provided below the impression cylinder having the same diameter or a double diameter as the plate cylinder to form a backside printing unit, and the front side printing unit and The impression cylinder forming the back printing unit is connected in the horizontal or zigzag direction to form one unit of front and back printing unit, and the impression cylinder diameter is made the same as the plate cylinder and blanket cylinder diameter, and each front and back of one unit A configuration in which two intermediate cylinders are interposed between the printing units, or a configuration in which the diameter of the impression cylinder is double the diameter of the plate cylinder and the blanket cylinder, and the intermediate cylinder is not interposed, and the cylinder axis of each cylinder and the intermediate cylinder is substantially linear or Zigzag 3. The perforated double-sided sheet-fed printing mechanism according to claim 2, wherein the printing is alternately performed on the front side and the back side of the printing paper.