JPH028587B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wiping device for wiping off excess ink transferred to an intaglio surface in an intaglio printing machine.

In printing operations using an intaglio printing machine, ink is transferred to the intaglio surface on the intaglio cylinder by an inking device, and the ink that has adhered to areas other than the picture area of the transferred ink is rotated against the intaglio surface. After wiping with a wiping roller, the remaining ink of the pattern is transferred to the paper that passes between the intaglio cylinder and the impression cylinder to perform printing. The wiping roller is rotated while being immersed in a cleaning liquid such as Triclean placed in a liquid tank, and a plurality of brushes extending in the axial direction are in contact with the peripheral surface of the wiping roller in the liquid. The ink transferred to the wiping roller by wiping is removed by the cleaning action of the brush and the cleaning liquid, and is dissolved by the cleaning liquid. Further, on the circumferential surface of the wiping roller, a scraping device for scraping off the cleaning liquid that the wiping roller adheres to the surface and tries to move around is located downstream of the brush with respect to the rotational direction of the wiping roller and is supported on the liquid tank side. It is provided.

Conventionally, the scraping device of the wiping device configured as described above is generally provided in two stages, upper and lower. First, the cleaning liquid is pressed against the peripheral surface of the wiping roller with the lower pad made of non-woven fabric, etc. After roughly scraping off, the upper scraper made of hard rubber performs the final scraping. However, these pads and scrapers in the past are in contact with the circumferential surface of the wiping roller over almost its entire length, and scrape off only the cleaning liquid from the circumferential surface. It did not have the function of scraping off. Therefore, both end surfaces carry the cleaning liquid, which is transferred to the intaglio cylinder, adheres to the intaglio surface, and decomposes the ink on the plate surface, causing printing problems such as thinning of the print in that area. I had something to do. Therefore, it is necessary to wipe the end face of the roller frequently, but since the wiping roller generally reciprocates in the axial direction, it is necessary to stop the machine each time wiping is performed, which is inefficient and reduces the amount of ink output after restarting operation. There were many problems, such as irregularities. In addition, the degree of this tangled phenomenon caused by the end surface is greatly affected by the level of the cleaning liquid, and therefore, it is troublesome to constantly control the level of the cleaning liquid. In addition, not only the edges are twisted, but also the scraping operation tends to result in poor scraping at both ends compared to the center, which leads to poor ink adhesion at both ends and printing problems. There was a problem that occurred.

The present invention has been made in view of the above points, and the scraping member is supported by a horizontal short axis so as to be able to move forward and backward in the direction of distance from and near the end face of the wiping roller, and the scraping end is located at the rotation rising end of the end face of the wiping roller. By biasing the wiping roller with a spring member so that it is pressed against the wiping roller, the cleaning liquid follows the reciprocating motion of the wiping roller and scrapes off the cleaning liquid from the roller end surface, and transfers from the intaglio side to the roller end. The present invention provides a wiping device for an intaglio printing press configured to scrape off ink that is about to accumulate. Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 3 show an embodiment of the wiping device according to the present invention, FIG. 1 is a sectional view thereof, and FIG.
The figure is a front view of the scraping device, and FIG. 3 is a plan view as well. In the figure, an intaglio cylinder 1 that rotates in the direction shown by arrow A in the figure is supported between the left and right machine frames of the printing section, and an intaglio cylinder 1 with a concave pattern on its circumferential surface. 2 is installed. 3
is a unitized wiping device, supported by a bracket on the machine frame side, and equipped with a liquid tank 5 in the form of a long box for storing cleaning liquid 4. In the liquid tank 5, a wiping roller 6 which rotates in the direction of arrow B opposite to the intaglio cylinder 1 and reciprocates in the axial direction with its peripheral surface facing the concave shape 2 has its lower half immersed in the cleaning liquid 4. It is pivoted. Further, between a plurality of sets of left and right arms (not shown) that are swingably supported on the side of the liquid tank 5, there are rotatable flush shafts 7, 8, 9, and 10 that are approximately the same length as the wiping roller 6. Each brush shaft 7, 8, 9, 10 has a base 11a, 12a, 13a, 14a and a plurality of rows of brushes 11b, 12b, 13b, 1 mounted on the base 11a, 12a, 13a, 14a.
4b, a pre-brush 11, and a main brush 1.
2, 13 and rear brush 14 are each fixed. Those indicated by symbols 15, 16, and 17 are
The wiper pad is made of synthetic fiber non-woven fabric and has approximately the same length as the wiping roller 6, and is interposed between the pre-brush 11, the pair of main brushes 12 and 13, the rear brush 14, and the peripheral surface of the wiping roller 6. The bent end is attached to the base 11a~1
4a, and is pressed from the back side with the tips of the brushes 11b to 14b. Reference numeral 18 denotes a doctor fixed to the upper surface of the liquid tank 5 by a bolt with a handle 19, and a doctor plate 20 made of hard rubber is disposed at its tip, the tip of which is in contact with the peripheral surface of the wiping roller 6 on the rising side of rotation. is fixed, and the blade 18 is configured so that by loosening the handle 1 and rotating the adjusting screw 21, the blade 18 moves forward or backward to adjust the gap between its tip and the wiping roller 6.

What is generally designated by the reference numeral 22 is a scraping device, which is provided between both end surfaces of the wiping roller 6 and the side plates of the liquid tank 5. That is, on the side plate 5a of the liquid tank 5, a spring shaft 23 as a horizontal short shaft and a support shaft 24 are fixed at their base ends with nuts 25 diagonally below both ends of the doctor plate 20, and are parallel to each other. Wiping roller 6 horizontally
protrudes toward the end face of the These two axes 2
3 and 24, a scraper stand 26 is fitted so as to be freely slidable in the direction of distance from the end surface of the wiping roller 6, and is attached to the wiping roller 6 side by a compression coil spring 27 mounted on the spring shaft 23. Forced. On the scraper stand 26, a scraper 28 as a scraping member formed into a flat plate shape of hard rubber is fixed with a bolt 29. This scraper 28 cuts an L-shaped notch on the end surface of the wiping roller 6. The rotation rising end and the peripheral end are pressed together by the elastic force of the compression coil spring 27 so that the long side and the short side are attached to each other. 30 is
This is a collar that prevents the scraper stand 30 from coming off the support shaft.

The operation of the wiping device 3 configured as above will be explained. An ink device transfers ink to the groove-shaped pattern area and other areas of the intaglio plate 2 on the intaglio cylinder 1, and the ink other than the pattern area is
It is wiped off by a wiping roller 6 rotating in the opposite direction to the intaglio cylinder 1 and adheres to its circumferential surface. The wiping roller 6 has its lower half immersed in the cleaning liquid 4, and has four brushes 11, 1 on its circumferential surface.
wiper pads 15, 16, which cover 2, 13, 14;
Since the wiper pads 17 are in contact with each other, the ink that has adhered to the peripheral surface of the wiping roller 6 due to wiping is removed by the cleaning liquid 4 that has permeated into the wiper pads 15, 16, and 17.
It is removed by the dissolving action of the wiper pads 15, 16, and 17 and the pressing action of the wiper pads 15, 16, 17. The wiping roller 6, which has had the ink washed off, attaches a cleaning liquid 4 to its circumferential surface on the rising side of the rotation and moves around, and this cleaning liquid 4 is applied to a doctor plate 20 whose tip is in contact with the circumferential surface. It gets scraped off.

Then, as mentioned above, the wiping roller 6
Due to the rotation of the cleaning liquid 4, the cleaning liquid 4 is attached not only to the circumferential surface but also to the end surface of the roller and is dragged around.
On the rising side of rotation, a part of it tries to go around to the edge of the peripheral surface. However, in this device, since the scraper 28 of the scraping device 22 has its notch attached to the outer circumference of the end face and both ends of the circumferential surface of the wiping roller 6, the scraper 28 attaches the notch to the outer circumference of the end face and both ends of the circumferential face. The cleaning liquid 4 that is about to enter is scraped off by the scraper 28. In this case, the wiping roller 6 is reciprocating in the axial direction in order to achieve a wiping effect, but the scraping device 22 has its scraper base 26 urged toward the wiping roller 6 by a compression coil spring 27. Therefore, the scraper 28 is always pressed against the outer periphery of the end surface and the end of the peripheral surface of the wiping roller 6, and even when the wiping roller 6 reciprocates, the scraping effect of the scraping device 22 is ensured.

When the scraping device 22 is not in use, the scraping device 22 is placed in the stored state by moving the scraper stand 26 toward the side plate 5a against the elastic force of the compression coil spring 27 and restricting its movement with the collar 30. It can be done.

FIG. 4 is a plan view showing another embodiment of the present invention corresponding to FIG. 3, and in this embodiment, the scraping member of the scraping device 22A is replaced with the scraper 28 of the previous embodiment. A brush 31 is used.
That is, the brush 31 is formed of a base 31a fixed to a brush stand 32 with bolts 29 and a flocked group 31b planted on the base 31a.
In b, the tip of the bristles is in a bent state facing the rotating rising end of the end face of the wiping roller 6, and
A part of it is attached to the edge of the peripheral surface of the wiping roller 6. The other configurations and effects are the same as in the previous embodiment.

Furthermore, in each of the embodiments shown in FIGS. 3 and 4, the support structure for the scraper stand 26 or the brush stand 32 may be structured as shown in FIG. 5. That is, FIG. 5 is a plan view corresponding to FIG. 3, in which the collar 30 is located outside the side plate 5a and is provided on the spring shaft 23 side, and the scraper stand 26 is attached to the spring shaft 23. Fixed. By doing so, the spring shaft 23 slides within the through hole of the side plate 5a, the scraper stand 26 slides along the support shaft 24, and the scraper 28 is pressed against the wiping roller 6 side. Furthermore, by moving the scraper stand 26 against the elastic force of the compression coil spring 27 and retightening the collar 30, the scraping device 22B can be brought into the retracted state. A brush 31 shown in FIG. 4 may be used instead of the scraper 28, and the action of scraping off the cleaning liquid 4 is the same as in each of the above embodiments.

As is clear from the above description, according to the present invention, in the wiping device of an intaglio printing press, the wiping roller is supported by the scraping member and the horizontal short shaft so as to be movable in the direction of distance from and away from the end surface of the wiping roller, and the scraping end is the wiping roller. By biasing the roller end face against the rising edge of rotation, the cleaning liquid attached to the end face as the wiping roller rotates and the cleaning liquid that wraps around from the end face to the peripheral end can be scraped off. In addition, since the scraping member follows the reciprocating motion of the wiping roller to ensure its scraping function, the ink will not become emulsified due to the moisture at both ends of the wiping roller. This eliminates defects in attachment and detachment from the printing plate, and enables uniform inking over the entire width of the paper, significantly improving the quality of printed matter.
In addition, this scraping member can scrape off the ink that is scraped up by the reciprocating motion of the wiping roller and accumulates on both ends of the ink, together with the cleaning liquid, thereby cleaning both ends of the wiping roller and the intaglio, thereby improving the quality of printed matter. further improves.

[Brief explanation of drawings]

1 to 5 show an embodiment of the wiping device for an intaglio printing press according to the present invention, FIG. 1 is a sectional view thereof, FIG. 2 is a front view of the scraping device, and FIG. 3 is a plan view thereof. , 4 and 5 are plan views showing other embodiments of the present invention corresponding to FIG. 3, respectively. 1... Intaglio cylinder, 2... Intaglio, 3... Wiping device, 4... Cleaning liquid, 5... Liquid tank, 6... Wiping roller, 22, 22A, 22B... Scraping device, 23... Spring shaft , 24... Support shaft, 27... Compression coil spring, 28... Scraper, 31... Brush.

Claims (1)

[Claims] 1. In a wiping device equipped with a wiping roller whose circumferential surface is in contact with the intaglio surface on the intaglio cylinder, which is immersed in a cleaning liquid in a liquid tank, is rotationally driven, and is reciprocated in the axial direction, the wiping roller is driven by a horizontal short axis. Intaglio printing, characterized in that it is provided with a scraping member that is supported so as to be able to move forward and backward in a direction toward and away from the end face of the wiping roller, and is biased by a spring member so as to press the scraping end against the rotational rising end of the end of the wiping roller. Machine wiping device.