JP2522216Y2 - Wiping device for intaglio printing press - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiping device for wiping excess ink transferred to an intaglio printing plate in an intaglio printing press.

[0002]

2. Description of the Related Art In a printing operation by an intaglio printing machine, ink is transferred to an intaglio surface on an intaglio cylinder by an inking device, and ink that has adhered to a portion other than a picture portion of the transferred ink is brought into contact with the intaglio surface. After wiping with a rotating wiping roll, the paper passing between the intaglio cylinder and the impression cylinder,
The printing is performed by transferring the ink of the remaining picture portion. The wiping roll is rotated while being immersed in a cleaning liquid such as trichlorene contained in a liquid tank, and a cleaning member extending in the roll longitudinal direction is in contact with the peripheral surface of the wiping roll in the liquid tank. The ink transferred to the wiping roll by wiping is removed by the cleaning action of the cleaning member and the cleaning liquid and is dissolved by the cleaning liquid.

[0003] As a structure of a cleaning member used in such a wiping apparatus, there is a structure as shown in FIG. 4 (see Japanese Patent Publication No. 2-8588 filed by the present applicant). That is, several cleaning members 3 for scraping excess ink wiped from the intaglio cylinder 1 from the wiping roll 2 are arranged in the circumferential direction of the roll, while each cleaning member 3 has a bristle tip on the peripheral surface of the wiping roll 2. And a brush unit 4 supported on the liquid tank 5 side with a plurality of rows of flocking groups 4a planted in close proximity to each other, and a peripheral surface of the wiping roll 2 formed of a nonwoven fabric made of synthetic fiber and the flocking group 4a. The cleaning sheet 6 is interposed between the brush ends and is supported by the brush unit 4.

[0004]

However, in the conventional wiping apparatus as described above, the cleaning effect of the cleaning sheet 6 as a wiper pad is not improved by the wiping roll 2 of the abrasive material attached to the nonwoven fabric. Wear due to friction,
The resin that adheres the abrasive to the nonwoven fabric becomes brittle due to the cleaning solution using the alkaline aqueous solution, and the resin rapidly decreases due to wear due to the brittleness and settling caused by being pressed against the wiping roll 2 of the nonwoven fabric having elasticity. Since the ink scraped off from the wiping roll 2 gradually accumulates inside the nonwoven fabric of the cleaning sheet 6 and causes clogging, the cleaning sheet 6 is removed from the liquid tank 5 together with the cleaning member 3 at the end of the printing operation. There was a problem that care for cleaning was required. As a means for preventing clogging, it is conceivable to make the cleaning sheet 6 of the cleaning member 3 thinner, but this is a problem because the durability is extremely deteriorated.

Accordingly, an object of the present invention is to provide a wiping device for an intaglio printing press that can improve the cleaning ability and durability and can reduce the cleaning work.

[0006]

In order to achieve the above object, the present invention comprises a wiping roll which transfers ink adhering to an intaglio surface on an intaglio cylinder and is rotationally driven in a liquid tank; A cleaning member disposed in the liquid tank in contact with the peripheral surface of the roll and cleaning the peripheral surface of the wiping roll with a cleaning liquid, wherein the cleaning member is disposed along the roll longitudinal direction. Base and
It is characterized in that it is constituted by a thin-plated pad which is curved and fixed in an arch shape on this base and has a large number of small holes for scraping ink provided on at least a top surface portion elastically contacting the peripheral surface of the wiping roll.

[0007]

According to the above construction, the ink wiped from the intaglio cylinder and transferred to the wiping roll is positively and finely scraped off by the large number of small holes of the thin plate and dissolved in the cleaning liquid. Also, at this time, the pad fixed in an arched shape has elasticity itself, so that the top surface has a predetermined contact width and is pressed against the peripheral surface of the wiping roll to enhance the cleaning ability. Can be

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a wiping device showing an embodiment of the present invention, and FIG. 2 is a developed view of a thin pad similarly.

In FIG. 1, an intaglio cylinder 10 rotating in a direction indicated by an arrow A in the figure is provided between left and right machine frames of a printing unit.
Is supported, and an intaglio 11 having a picture portion formed in a concave shape is mounted on the peripheral surface thereof.

In the figure, reference numeral 12 denotes a unitized wiping device which is supported by a bracket (not shown) on the machine frame side, and is a long box-shaped liquid tank 1 for storing a cleaning liquid 13.
4 is provided.

In the liquid tank 14, a wiping roll 15 rotating in the direction of arrow B opposite to the intaglio cylinder 10 with its peripheral surface in contact with the intaglio 11 and reciprocating in the longitudinal direction is provided with a cleaning liquid for the lower half of the roll. 13 and supported by a shaft.

Further, between a plurality of sets of arms (not shown) supported on both left and right portions of the liquid tank 14 so as to be able to swing back and forth, four support shafts 16a having substantially the same length as the wiping roll 15 are provided.
16d are rotatably mounted on the roll circumferentially with a predetermined spacing therebetween in the circumferential direction of the roll.
7a to 17d are respectively supported.

Among the cleaning members 17a to 17d, the cleaning member 17a located at the most downstream side in the roll rotation direction is rotatably fitted to a support shaft 16a and has a base 18 extended in the roll longitudinal direction. A plurality of rows of flocking groups 19 are set on the base 18 and the tips of the bristle elastically contact the peripheral surface of the wiping roll 15 to form a so-called brush unit.

The other three cleaning members 17b to 17d
Is a base 20 that is rotatably fitted to each of the support shafts 16b to 16d and extends in the roll longitudinal direction, and a thin plate pad fixed to the base 20 by bending in an arch shape in the roll rotation direction. 21.

As shown in FIG. 2, the thin plate pad 21 is formed by forming a steel plate such as carbon tool steel (SK material) having a plate thickness t of about 0.15 to 0.25 mm in a strip shape. Top surface portion 22 elastically contacting the peripheral surface of wiping roll 15
A large number of small holes 23 having a diameter of about 1 to 1.5 mm are formed in a staggered arrangement. In FIG. 2, reference numeral 24 denotes a fixing notch.

The liquid tank 14 is provided with a doctor device 25 having a scraper for scraping off a cleaning liquid which is attached to the peripheral surface of the wiping roll 15 and is carried around, and is attached to both end surfaces of the wiping roll 15. Member 28 having a scraper for scraping off the cleaning liquid to be carried around
The cleaning liquid is transferred to the intaglio cylinder 10 and adheres to the intaglio surface to decompose the ink on the plate surface, thereby preventing printing troubles such as thinning of the printing at that location and preventing the cleaning liquid from flowing out of the liquid tank. Prevents scattering.

With such a configuration, the ink is transferred to the intaglio 11 on the intaglio cylinder 10 by the inking device between the intaglio-shaped pattern portion and the other portions. It is wiped off by the wiping roll 15 rotating in the opposite direction to the body 10 and adheres to the peripheral surface thereof.

The lower half of the wiping roll 15 is immersed in the cleaning liquid 13, and the peripheral surface of the
Since the three cleaning members 17a to 17d are in contact with each other, the ink attached to the peripheral surface of the wiping roll 15 by the wiping is effectively removed by the three thin-plate pads 21 and the plurality of rows of flocking groups 19. That is, the thin pad 2
In No. 1, while the ink is positively and finely scraped off by the pressing action and the scraping action by the small holes 23, the flocking group 19
Then, the brushing removes the ink. Further, the scraped ink is immediately washed with the cleaning liquid 13.
Dispersed and dissolved therein.

Then, the wiping roll 15 from which the ink has been washed off is carried around with only the cleaning liquid 13 adhered to the peripheral surface thereof. Since the doctor device 25 is provided there, the cleaning liquid 13 carried around is removed. And the wiping roll 15 continues the ink wiping operation.

The four cleaning members 17a to 17a-1 described above are used.
In 7d, the pressure is adjusted by swinging a plurality of sets of arms (not shown) in the same manner as before, and the one-handedness is canceled by a known one-handedness canceling means (not shown) in the same manner as before.

In the present embodiment, since the pad 21 is made of a thin steel plate, the ink does not clog the small holes 23 of the pad 21 and the cleaning ability does not decrease at all. Therefore, it is no longer necessary to clean the pad 21 and remove the clogging as in the related art. Further, since the diameter of the small hole 23 is small, the unnecessary ink that has passed through the pad 21 once again assumes a sludge shape without being collected again, and is easily dissolved by the cleaning liquid 13.

Further, since a steel plate is used for the pad 21,
The service life has been remarkably (more than doubled) longer than the conventional nonwoven pad. It should be noted that the same effect can be obtained without using a steel plate as a base material, if a pad having a plurality of small holes is formed from a thin plate having the same function (alkali resistance, abrasion resistance, moderate elasticity) as a material. Needless to say.

Also, since the pad 21 is formed by bending the thin plate, the pad itself has elasticity with respect to the contact, and thus a predetermined contact width is secured, while the pad 21 is a thin plate. Therefore, there is no need to press with a brush from under the non-woven fabric unlike the related art. Therefore, the cleaning liquid is immediately below the pad 21 and the wiping roll 1
The ink, which has been scraped off from 5 and thinly extruded, comes into contact with the cleaning liquid having a dissolving ability quickly, and unnecessary ink is not deposited on the cleaning members 17b to 17d configured as a unit, thereby simplifying the cleaning operation. Effect.

The number of the cleaning members 17a to 17d and the arrangement of the small holes 23 in the thin plate 21 are not limited to those shown in the drawings.

Next, FIG. 3 is a sectional view of a wiping device showing another embodiment of the present invention. This causes the cleaning liquid 13 to be jetted toward the peripheral surface of the wiping roll 15 from the nozzle holes of the injection pipes 26a to 26d arranged along the support shafts 16a to 16d without storing the cleaning liquid 13 in the liquid tank 14. This is an example.

The cleaning liquid 13 is distributed and supplied to each of the injection pipes 26a to 26d from a not-shown injection device via a branch pipe or the like. In addition, the nozzle holes of each of the injection pipes 26a to 26d are provided in a large number in the longitudinal direction of the roll.
Are directed toward the sliding contact portion between the thin plate pad 21 and the wiping roll 15. In the figure, reference numeral 27 denotes a drain plug.

According to this, since the wiping roll 15 does not carry the cleaning liquid at both end surfaces as in the previous embodiment, a scraping member (see reference numeral 28 in FIG. 1) is not required, and as a result, the roll is not required. High-speed rotation of the machine becomes possible, and high-speed operation of the machine is achieved.

Further, since the ink scraped off by the small holes 23 of the pad 21 is blown off by the jet, there is an advantage that the cleaning ability is improved and no clogging is caused.

Of course, the cleaning ability and durability of the thin plate 21 are the same as in the previous embodiment.

In the above embodiment, each of the injection pipes 26a to 26a
The same effect can be obtained even if 26d is provided inside the thin pad 21.

The present invention can be applied not only to the case where the wiping roll 15 directly contacts the intaglio cylinder 10 but also to the case where the wiping roll 15 contacts the intaglio cylinder 10 via several rolls. Nor.

[0032]

As described above, according to the present invention, a cleaning member which contacts a wiping roll is provided with a base provided along the longitudinal direction of the roll, and the base is curved in an arch shape in the roll rotation direction. And a thin pad provided with a large number of small holes for ink scraping at the top surface at least elastically contacting the peripheral surface of the roll, so that cleaning performance and durability can be improved and cleaning work can be reduced. A wiping device for an intaglio printing press can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of a wiping device showing an embodiment of the present invention.

FIG. 2 is a development view of a thin-plate pad.

FIG. 3 is a cross-sectional view of a wiping device showing another embodiment of the present invention.

FIG. 4 is a sectional view of a conventional wiping device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Intaglio cylinder 11 Intaglio 12 Wiping device 13 Cleaning liquid 14 Liquid tank 15 Wiping roll 17a-17d Cleaning member 20 Base 21 Thin plate 22 Top surface 23 Small hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A wiping roll which transfers ink adhered to an intaglio plate surface on an intaglio cylinder and is rotationally driven in a liquid tank; and a wiping roll disposed in the liquid tank in contact with a peripheral surface of the wiping roll. In a wiping apparatus provided with a cleaning member for cleaning a peripheral surface with a cleaning liquid, at least the wiping is performed by fixing the cleaning member to a base disposed along the longitudinal direction of the roll and bending the base in an arch shape on the base. A wiping device for an intaglio printing press, comprising: a thin plate pad provided with a large number of small holes for scraping ink on a top surface portion in elastic contact with a roll peripheral surface.