JPS61169251A - Rotary press - Google Patents

Abstract

PURPOSE:To certainly and rapidly correct the shift of a printing surface and a processing position, by arranging an adjustment part, which adjusts feed tension while changes the same on the basis of the output of a tension detector, behind the processing part for applying the processing a folding perforation to a material to be printed. CONSTITUTION:The material 1 to be printed sent out from a wind-up body 1 is sent by a first dancer roller 5 through a guide roller 4 to receive rough adjustment and passes a first feed roller 16, a second dancer roller 7, a guide roller 8, a printing part 9, a first tension detector 12, a second feed roller 15, a superposition part 17, a second tension detector 20, a post-processing part 18 applying a folding perforation and the nip between a third feed roller 19 and a nip roller 21. A fluid control part 13 displaces the second dancer roller 7 in a movable state through an operator 14 corresponding to the output of a first tension detector 12 to perform the fine adjustment of feed tension. A fluid control part 22 changes the contact pressure with the material 1 to be printed through an operator 23 and the nip roller 21 corresponding to the output of the second tension detector 20 and controls tension to correct the deviation of a printing surface and a processing position.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present application relates to a rotary printing press that can accurately align a printing surface with a processing position of a folding machine or the like.

Conventional Technology and Problems In general, in rotary printing machines for printing materials such as continuous paper or continuous sheets of vinyl, after printing is performed by the printing section, post-processing such as additional printing such as folding sewing machines, crash numbers, or perforation is performed. However, conventional rotary printing presses do not have any means for correcting deviations between the printing surface and the processing position that occur due to changes in slug lag between the feed roller and the printing material in the processing section. For this reason, even though the printing accuracy in the printing section was improved by finely adjusting the feeding tension of the printing material, there was a drawback that the deviation in the post-processing section resulted in defective products.

OBJECTS, EMBODIMENTS AND OPERATIONS OF THE INVENTION Therefore, the present application aims to improve the deficiencies of the prior art, and embodiments thereof will be described in detail below with reference to the drawings.

Figure 1 shows a configuration diagram in which only a single printing system A is detailed, main parts of other printing systems B to E are omitted, and a copy slip is created by overlapping printed materials. The printing material (1) that is pulled out from the winding material (21) is rotatably supported on a support base (3). , a pair of guide rollers (4), one dancer roller (5) located between them, and a feed section (6) consisting of three feed rollers; one dancer roller (71) and one guide roller ( 8) and the printing department (
9).

The first dancer roller (5) is, for example, a manual adjustment part Q.
It is connected to the movable part of the pressurized fluid operating unit 01) operated by OI, and is moved up and down in the figure by the pressurized fluid operating unit 1 to move the printing material (11) fed out from the winding body (21).
Adjust the feed tension. The printing section (9) includes a plate cylinder (9
)a, a plan cylinder (9)b, and an impression cylinder (9)C.
After this printing section (9),
A tension detector (121) consisting of three rollers is provided.

This tension detector (12.
13;, a second pressurized fluid actuating body (14;) is controlled by the second pressurized fluid actuator (14;) for movably displacing the two dancer rollers (7) to adjust the feeding tension of the printing material (1, 1); Each has a liquid reservoir.

After the tension detector 1121, a second feed roller (151) and a guide roller (overlapping section for polymerizing printed materials (11) from other printing systems B to E through the country) are installed. (171, a folding sewing machine, a post-processing e+181 for performing additional printing or perforation, etc.), and a third feed roller (19) are primarily arranged.

A second tension detector (20) is placed between the overlapping part 0n and the processing part, and is in pressure contact with the roller 09) at the position of the feed roller (19) in the front part 3. Nip roller (2
(1) A third tension detector (20) is provided between the tension detectors (20), and a third
Fluid control @ (22, and Lf in this fluid control section (23)
) is connected to a pressurized fluid actuating body (231) that is controlled to vary the pressure of the nip roller (2) 1 against the third feed roller 091.

According to the present application, however, the printing materials (11 pieces) fed out from the roll body (2), the guide roller (41, the onidancer roller (5), the fang 1 feed roller (6), the second dancer roller (
force, guide roller (8), printing section (91, tension detector [+21°] second feed roller (15), overlapping section (171
, second tension detector i2+1, post-processing section (country), passes between the third feed roller (I!1 and nip roller (21), The adjustment is carried out, and the second dancer roller (7) performs a fine adjustment of the feed tension, and then the post-processing section Q
At the rear of l'llO, the pressure against the printing medium (1) is varied by the nip roller.

In other words, since the peripheral speed of the third feed roller 0!3 is faster than the feed speed of the printing medium, when the tension at the second tension detector (2 [11) is large, the contact pressure of the nip roller 1 acts weakly. When the tension at the second tension detector (201K) is small, the third fluid control section acts so that the pressure of the nip roller +211 is strong.

Effects of the Invention Since the present application has a VC configuration as described above, it is possible to reliably prevent deviations between the printing surface and the processing position caused by changes in slip between the feed roller and the printing material in the processing section. It can be quickly corrected and is particularly effective as a rotary printing machine for close-up slips created by overlapping a plurality of printed parts.

[Brief explanation of the drawing]

The drawings are configuration diagrams showing embodiments of the present application. In the figure, (1) is the printing object, (5,:, (7) is the dancer roller, old 1° (14i), (241 is the pressurized fluid operating body, (9) is the printing section, +1211 +211 is the tension detector, (171 is the overlapping part, (18) is the processing part, (+91 is the feed roller, [21+ is the nip roller, (2z is the fluid control part)

Claims (4)

[Claims] (1) In the processing section where the printing material is sent out from the roll of printing material and subjected to processing such as folding sewing machine after being printed, a tension detector is placed in front of the processing section, and A rotary printing press characterized in that an adjustment section is disposed at a rear position to adjust the feeding tension by varying it according to the detection output of the tension detector. (2) Claim 1 comprising a plurality of printing systems, and a tension detector, a processing section, and an adjustment section arranged in sequence after the printed paper from each printing system is superimposed. The rotary printing press described. (3) Claims in which the adjustment section comprises a nip roller that presses the printing material against a feed roller, and a pressurized fluid operating body that varies the pressing pressure of the nip roller in accordance with the detection output from a tension detector. The rotary printing press according to item 1 or 2. (4) Claim 1, in which the printing material is continuous paper;
The rotary printing press according to item 2 or 3.