JP2005088514A - Variable printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an interval between an intermittent feeder and a printing unit adjacent to the intermittent feeder from being lengthened, even if each printing unit is moved in a direction wherein an interval between the printing units is shortened. <P>SOLUTION: In a variable printing machine, a plurality of sets of printing units 3a, 3b and 3c, which are arranged between upstream-side and downstream-side intermittent feeders 11 and 12, are moved according to a change in printing size, so that the interval between the respective printing units can be changed; and at least one intermittent feeder can be moved in accordance with the movement of the printing unit adjacent to the intermittent feeder. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a variable printing machine that prints a pattern having a vertical length shorter than the circumference of a blanket cylinder on a continuous sheet without any extra space between the printed patterns.

  The variable printing machine is configured as shown in FIG. 1, and a plurality of sets of printing units 3a are provided between the upstream and downstream intermittent feeding devices 1 and 2 that can perform forward rotation and reverse rotation synchronously. , 3b are arranged. Each printing unit 3a, 3b is composed of a plate cylinder 4, a blanket cylinder 5, and an impression cylinder 6. The blanket cylinder 5 has a large diameter on its peripheral surface, for example, a printing surface having a ½ circumferential length sa. A blanket 7 is attached to the peripheral surface of the large diameter portion.

  In this variable printing machine, for example, in one printing unit 3a, the plate is transferred from the plate cylinder 4 to the blanket 7 over the circumferential length from the starting end s to b, that is, the vertical length is sb. When printing is continuously performed on the paper 8 repeatedly in the top-to-bottom direction, while the blanket cylinder 5 is continuously rotated, the paper 8 has a circumference of the large-diameter portion of the blanket cylinder 5 by the action of the intermittent feeding devices 1 and 2. It travels forward at a constant speed over sa, and there is no next blanket 7, and there is a gap between the blanket cylinder 5 and the impression cylinder 6, and a- The vehicle travels in the opposite direction by b, and this is sequentially repeated, so that each time the blanket cylinder 5 rotates, an image having a vertical length of sb is repeatedly printed on the paper 8. (For example, refer to Patent Document 1). Further, in this variable printing machine, the printing unit is moved to an appropriate position for each size along the paper running line in accordance with the change in the vertical size of the pattern (see, for example, Patent Document 2). ).

  The upstream intermittent feeding devices 1 and 2 in the variable printing machine are fixed to the downstream side of the paper supply device, and the downstream intermittent feeding devices are fixed to the upstream side of the processing section. The printing units 3a and 3b move between the intermittent feeding devices (see, for example, Patent Document 2).

JP 2003-39630 A JP 2003-53930 A

  In the conventional variable printing press, a plurality of sets of printing units are movably arranged between the intermittent feeding devices installed at regular intervals, so when the printing unit is moved while maintaining the vertical size of printing, for example, When the upstream printing unit is moved relative to the most downstream printing unit in a direction in which the mutual spacing becomes narrower, the interval between the most upstream printing unit and the upstream intermittent feeding device increases. Paper path is longer than necessary. This becomes longer as the number of printing units is larger.

  For this reason, if the interval between the intermittent feeding device and the printing unit becomes larger than necessary due to the change in the vertical size as described above, the paper that intermittently travels during this time is likely to flutter and meander, and the tension fluctuation Will adversely affect the accuracy of printing registration.

  The present invention has been made in view of the above. When the printing unit is moved, the intermittent feeding device can be moved following the movement, and each printing unit is moved so that the interval between the printing units is reduced. Another object of the present invention is to provide a variable printing machine that can solve the above-described conventional problems by ensuring that the interval between the intermittent feeding device and the printing unit does not become wide and can always be as short as possible. .

  In order to achieve the above object, the variable printing press according to the present invention has a plurality of sets of printing units arranged between the upstream and downstream intermittent feeding devices, and moves the printing units according to the change in printing size. In the variable printing machine in which the interval between the printing units is changed, at least one intermittent feeding device is configured to be movable in accordance with the movement of the printing unit adjacent thereto. In addition, the intermittent feeding device that can be moved and a printing unit adjacent to the intermittent feeding device are integrated.

  According to the present invention, the interval between the intermittent feeding device and the printing unit adjacent to the intermittent feeding device can always be minimized even when each printing unit is moved by changing the vertical size of printing. Even when the vertical size of the paper is changed to a shorter one, there is no gap between the intermittent feeding device and the adjacent printing unit, and in this case, it is possible to prevent the occurrence of paper flapping and meandering. The printing register accuracy can be maintained.

  An embodiment of the present invention will be described with reference to FIG. In this description, the same members and devices as those shown in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

  FIG. 2 shows a paper threading state when variable printing is performed only on one side of the paper 8. The plurality of printing units 3a, 3b, and 3c are fixed to the base 9 with a predetermined interval, and the paper 8 supplied from the paper feeding device 10 passes through the intermittent feeding device 11 on the upstream side to each printing unit 3a. Through 3c, reaches the downstream intermittent feeding device 12, and is further passed through the processing unit 13.

  As described above, the printing units 3a to 3c are movable with respect to the base 9, and are moved in the running direction of the paper 8 in order to change the distance between them depending on the vertical length of the printed pattern. Alignment is performed. A dryer 14 such as a UV dryer for drying the printing surface is provided on the downstream side of each of the printing units 3a to 3c.

  Both the upstream and downstream intermittent feeding devices 11 and 12 are of a known configuration comprising s-shaped feeding portions 11a and 12a and loop portions 11b and 12b (or dancer rolls). The s-shaped feeding portions 11a and 12a They are arranged symmetrically so as to face the printing unit side. In each of the intermittent feeding devices 11 and 12, the upstream intermittent feeding device 11 is configured separately from the paper feeding device 10, and is fixed so as to be movable in the traveling direction of the paper 8 with respect to the base 9. It is configured to be. Further, the intermittent feed device 12 on the downstream side is configured separately from the processing unit 13 and is configured to be fixed to the base 9 so as to be movable in the traveling direction of the paper 8.

  The supporting structures of the printing units 3a to 3c and the intermittent feeding devices 11 and 12 with respect to the base 9 are basically the same, and an example thereof is schematically shown in FIG.

  The frames 15 of each unit and apparatus are placed on a rail 16 fixed on the base 9 so as to be movable over a predetermined stroke in the running direction of the paper 8 via a linear guide 17. The frame 15 is screwed onto a screw shaft 18 provided in the moving direction on the base 9, and the frame 15 is moved by rotating the screw shaft 18 to the handle 20 via the bevel gear mechanism 19. ing. Further, on the base 9 side, a lock member 21 is provided so as to move downward by rotating the eccentric cam shaft 22, and an upper end portion of the lock member 21 is opposed to one side portion of the frame 15. Yes. The frame 15 is pressed against the base 9 and fixed by moving the lock member 21 downward.

  In the above configuration, in the case of the printing units 3 a to 3 c, an electric motor that can be individually controlled like a sectional motor may be used instead of the handle 20. In this case, the value of the position of the frame 15 detected by a detection device such as a potentiometer is input to the control device.

  In the above configuration, the interval between the printing units 3a to 3c is changed and fixed at a predetermined position in accordance with the change in the vertical size of the pattern. At this time, when the space between the printing units is narrowed by L, for example, when the third printing unit 3c which is the most downstream side is fixed and used as a reference, when there are three sets of printing units, the most upstream side That is, the first printing unit 3a is moved to the downstream side over 2L, and the distance from the upstream intermittent feeding device 11 is increased accordingly. Accordingly, at this time, the upstream intermittent feeding device 11 is moved downstream by 2 L, thereby preventing the paper path on the inlet side with respect to the printing unit 3a from spreading.

  When the above operation is performed based on the most upstream printing unit 3a, the downstream intermittent feeding device 12 is moved according to the amount of movement of the most downstream printing unit 3c.

  FIG. 4 shows a paper threading state when variable printing is performed on the back surface by the most upstream side printing unit 3a and variable printing is performed on the front surface by the other printing units 3b and 3c. The paper 8 from the upstream intermittent feeding device 11 is reversely reversed from the upper side of the first printing unit 3 a to the guide roll 11 c provided in the intermittent feeding device 11 to perform variable printing on the back surface of the paper 8. Thereafter, the paper roll 8 is reversed from the guide roll 11c to pass the paper 8 from the first printing unit 3a to the following printing units 3b and 3c, and variable printing is performed on the surface thereof.

  Also in this case, according to the change in the interval between the printing units 3a to 3c accompanying the change in the vertical size of the printed pattern, the upstream or downstream intermittent feeding devices 11 and 12 are moved to print the interval feeding devices 11 and 12 together. Set the paper interval between units to be the shortest.

  In this case, the interval between the upstream intermittent feeding device 11 and the first printing unit 3a is wider than that in the case of single-sided printing shown in FIG. 2 because the dryer 14 is installed in this portion. Become. In this case, the paper 8 between the upstream intermittent feeding device 11 and the first printing unit 3a is guided by the guide roll and has three paper paths, so the paper path between them is compared with other parts. However, the paper path during this period when the intermittent feeding device 11 is moved to the printing unit 3a side is shortened by a length that is three times the movement amount of the intermittent feeding device 11.

  FIG. 5 shows another embodiment of the present invention, in which the upstream intermittent feeding device 11 is integrated with the first printing unit 3a. Although not shown in the drawing, the intermittent feed device 12 on the downstream side is integrated with the third printing unit 3c on the lowest sulfur side. In this embodiment, a mechanism for moving the intermittent feeding devices 11 and 12 becomes unnecessary.

  According to this embodiment, the upstream and downstream intermittent feeding devices 11 and 12 move integrally with the printing units 3a and 3c, and are fixed integrally with the printing units 3a and 3c. The intervals between the intermittent feeding devices 11 and 12 and the printing units 3a and 3c are always kept in the shortest state.

  Since FIG. 5 shows the case of single-sided printing, in the case of double-sided printing, as shown in FIG. 4, the two are integrated with a necessary length.

It is explanatory drawing which shows the schematic structure of a variable printing machine. FIG. 2 is a configuration explanatory view showing a single-sided printing state in the variable printing machine according to the present invention. It is a perspective view which shows schematically the structure of the flame | frame made movable and its moving means and fixing means. It is a schematic explanatory drawing in the case of performing duplex printing. It is a schematic explanatory drawing which shows the other example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 11, 2, 12 ... Intermittent feeding device 3a, 3b, 3c ... Printing unit 4 ... Plate cylinder 5 ... Blanket 6 ... Impression cylinder 7 ... Blanket 8 ... Paper 9 ... Base 10 ... Paper feeder 13 ... Processing machine 14 ... Dryer 15 ... Frame 16 ... Rail 17 ... Linear guide 18 ... Screw shaft 19 ... Bevel gear mechanism 20 ... Handle 21 Lock member 22 ... Eccentric cam

Claims (2)

In the variable printing machine in which a plurality of sets of printing units are arranged between the upstream and downstream intermittent feeding devices, and the intervals between the printing units are changed by moving the printing units according to the change of the printing size,
A variable printing machine, wherein at least one intermittent feeding device is movable in accordance with the movement of a printing unit adjacent thereto. In the variable printing machine in which a plurality of sets of printing units are arranged between the upstream and downstream intermittent feeding devices, and the intervals between the printing units are changed by moving the printing units according to the change of the printing size,
Making at least one of the intermittent feeding devices movable in accordance with the movement of the printing unit adjacent thereto,
A variable printing machine characterized in that the intermittent feeding device and a printing unit adjacent to the intermittent feeding device are integrated.

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