JPH0371019B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing apparatus that combines two printing presses and a coupling device.

BACKGROUND ART Conventionally, there have been printing machines in which printing devices are disposed at the front and rear of a single machine, and a printing paper reversing device is disposed between the printing devices. This printing machine had the disadvantage that each printing device could not be used independently.
Further, this printing machine had the drawback that although double-sided printing was possible, single-sided two-color printing was not possible.

Furthermore, when double-sided printing is performed, the leading edge and trailing edge of the printing paper are switched, so there is a drawback that positioning of the printed image must be performed twice. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a printing device that solves the drawbacks of the printing method of the printing press described above.

Embodiments of the invention will be described based on the drawings. First of all, to describe the configuration used in this printing method, the first printing machine 1 and the second printing machine 4
are arranged in a row, and rails 5 and 6 are arranged orthogonally between the first printing press 1 and the second printing press 4,
A reversing and transferring device 3 is movably arranged on these rails 5, 6. This reversing and transferring device 3
is the first printing press 1 and the second printing press 4 on the rails 5 and 6.
It is possible to arrange it fixedly between them or to move it on the rails 5, 6 to the sides of the first printing press 1 and the second printing press 4. When the reversing and transferring device 3 is moved laterally and disposed, the first printing press 1 and the second printing press 4 are in a state where they can each be used as an independent printing press.

Next, in the case of double-sided printing shown in FIGS. 1 and 5 A and B, the printing paper 2 printed on the front side by the first printing machine 1 is transferred to the reversing and transferring device 3. . This reversing and transferring device consists of a reversing roller 1 having a guide roller 10 disposed oppositely on the back circumferential surface.
1. Consists of an entry side belt 12 for placing and transporting the printing paper 2 arranged side by side on the front side of the reversing roller 11, and an exit side belt 13 for mounting and transporting the printing paper 2,
The paper to be printed 2 whose front side has been printed by the first printing machine 1 is placed on the upper surface of the entrance belt 12 from a direction perpendicular to the direction of travel of the inlet belt 12 using a feeder or the like, and then sent to the underside of the reversing roller 11 and then being transferred to the reversing roller 11. A reversing roller 11 is interposed between the guide roller 10 and the reversing roller 11 in a counterclockwise direction (fifth direction).
Wrap it around Figure A) and transfer. When the paper 2 to be printed is turned over and sent out from above the reversing roller 11, the paper 2 to be printed is placed and transferred onto the exit side belt 13 which is moving in the direction of the arrow in FIG. When the printing paper 2 is transported to a predetermined position, it is sent out toward the second printing machine 4 in a direction perpendicular to the traveling direction of the exit side belt 13, and the back side of the printing paper 2 is printed to perform double-sided printing. The paper to be printed 2 is transferred from the first printing machine 1 onto the upper surface of the entrance side belt 12 and from the exit side belt 13 to the second side.
To feed the printing paper 2 into the printing machine 4, the paper is fed by a delivery roller or delivery belt, and the front end of the printing paper 2 in the feeding direction of the paper fed onto the upper surface of the entry belt 12 is transferred to the entry belt 12.
The paper 2 to be printed is made to protrude slightly from the upper edge (FIG. 5 B) and hit the registration (stopper), and similarly, the printing paper 2 is made to protrude slightly from the upper edge of the exit side belt 13 (FIG. 5 B). Therefore, the paper feed roller 14 that feeds the printing paper 2 toward the second printing machine 4
The reversed printing paper 2 can be fed into the second printing machine 4 by a drive roller 15 that is provided so as to come into contact with and separate from the printing paper 2 in accordance with the feeding speed of the printing paper 2.

FIG. 6 shows a part of the printing paper 2 printed by the first printing machine 1 placed on the entrance side belt 12 in an overlapping state, with the reversing roller 11 and the guide roller 1.
0 and transferred onto the exit side belt 13 as described above. However, in this case, since the speed of the exit side belt 13 is faster than the speed of the entrance side belt 12, the paper to be printed is 1
The sheets are arranged one by one and placed on the exit belt 13. Other means are as described in Figure 5 A and B. Printing paper 2
To avoid staining the printed surface of the guide roller 1,
0 is arranged so as to be in contact with the white surface on both sides of the printing paper 2 with respect to the reversing roller 11.

Next, as another example, a case will be described in which a part of the printing paper 2 printed by the first printing machine 1 is overlapped and supplied to the second printing machine 4. In this case, the first printing machine 1 The reversing speed of the reversing and transporting device 3 is made slower than the printing speed. For this purpose, the printing paper 2 printed by the first printing machine 1 is partially superimposed on the printing paper 2 that is being transferred laterally in the reversing and transporting device 3. In this state, the sheets are sequentially transferred laterally and reversed, and then partially overlapped in the front-rear direction and transferred to the paper feeding device of the second printing press 4.

Next, referring to the case of single-sided two-color printing shown in FIG. 2, the first printing machine 1 prints on the front side of the printing paper 2, and the printing paper 2 is transferred to the reversing and transferring device 3,
Moving within this reversing and transferring device 3 as it is,
The first printing machine 1 is transferred to the second printing machine 4 and printed on the front side.
One-sided two-color printing is performed by printing in a printing color different from that printed in . In this case as well, the printing speed of the first printing press 1 is made slower than the transfer speed of the reversing and transferring device 3, and the printing speed of the second printing press 4 is set to be lower than the transfer speed of the reversing and transferring device 3.
The printing speed is set to be slower than that of the printing machine 1.

Next, the first printing press 1 and the second printing press 4 shown in FIG.
Regarding the case where each is used independently, the reversing and transferring device 3 disposed between the first printing press 1 and the second printing press 4 is moved to the side on the rails 5 and 6, and the The first printing press 1 and the second printing press 4 can each be operated independently.

Next, referring to another embodiment in which the first printing press 1 and the second printing press 4 shown in FIG. After moving the installed reversing and transferring device 3 to the side, the first printing press 1 and the second printing press 4 are rotated and arranged diagonally, and the first printing press 1 and the second printing press 4 are rotated. To facilitate work when each machine 4 is used independently.

Since this invention is constructed as claimed in the claims based on the embodiments described above, it has become possible to perform single-sided two-color printing and double-sided printing using two printing machines.

Furthermore, by moving the reversing and transporting device laterally, it became possible to use each of the two printing presses independently as a printing press.

[Brief explanation of drawings]

Figure 1 is a perspective view of double-sided printing;
The figure is a perspective view when performing two-color printing, and Figure 3 is a perspective view of two-color printing.
A perspective view when each printing machine is used individually,
Fig. 4 is a plan view of another embodiment in which two printing machines are used individually, and Figs. 5 (a) and (b) are explanatory diagrams of the reversing and transporting device in a state in which printing sheets are normally arranged side by side and transported. , FIG. 6 is an explanatory view of the reversing and transporting device in a state in which printing sheets are reversibly transported while partially overlapping each other.

Claims (1)

[Claims] 1 Transfer the printing paper 2 from the first printing machine 1 to the second printing machine 4
In the printing apparatus, the first printing machine and the second printing machine perform one-sided one-color or one-sided two-color printing. A reversing roller 1 is provided with a guide roller 10 arranged in parallel on the back circumferential surface in order to reverse and transport the printing paper 2 in a direction perpendicular to the transport direction of the printing paper 2.
1, an entrance side belt 12 which is arranged side by side on the entrance side of the reversing roller 11 and supplies the printing paper 2 transferred from the first printing machine 1 to the reversing roller 11, and an entrance side belt 12 which is arranged side by side on the exit side of the reversing roller 11. a reversing and transporting device 3 consisting of an exit belt 13 on which the paper 2 to be printed is placed and transported to the second printing machine 4; and rails 5 and 6 that move the reversing and transporting device 3 laterally.
and a drive roller 15 provided so as to come into contact with and separate from the feed roller 14 that feeds the printing paper 2 toward the second printing machine 4 in accordance with the feeding speed of the printing paper 2.
A printing device characterized by: