JPH03101941A - Ink wiper for inking device for printer - Google Patents

Abstract

PURPOSE:To perform a wiping operation even in a state where ink is continuously supplied to a plate cylinder during printing operation by providing a pressing member for pressing a stripelike wiper to an inking surface and driving means for displacing the wiper perpendicularly to the lateral direction. CONSTITUTION:A wiping material roll 1a wound in a rolled state with a wiper 1 and a winding core shaft RT are rotatably disposed as a pair in parallel with an ink roller IR or a roller R1 near at hand, and the shaft RT is coupled to a motor M of driving means through a suitable mechanism. The leading edge of the wiper 1 drawn from the roll 1a is attached to the shaft RT. The wiper 1 drawn between the roll 1a and the shaft RT is interposed to an expansible/contractible air bag type pressing member 3 disposed adjacent to the outer periphery of the roller IR or R1, provided in parallel and having a length of a lateral size of an ink medium surface of the roller IR or R1, and pressed to the outer periphery of the roller IR or R1 by the member 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an ink wiping device in an inking device of a printing press. [Prior Art] As a conventional ink removing device in an inking device of a printing press, there is, for example, a device as described in Japanese Utility Model Application Publication No. 109735/1983.

This device has a doctor attached to the top of one of the side walls extending in the longitudinal direction, and rotates the ink reservoir which is rotatably and detachably provided at the fulcrum provided at the bottom. are pressed against and separated from the metal rollers of the ink roller group, and an automatic spraying device for spraying cleaning oil onto the ink roller group is provided above the ink roller group.

Then, the printing machine is operated by pressing the doctor against the metal roller, and cleaning oil is sprayed onto the ink roller group.
The waste ink loosened by the cleaning oil is collected into the ink reservoir using a doctor and discharged through the discharge pipe attached to the ink reservoir.

[Problem to be solved by the invention]

The ink removal device in the inking device of the printing press mentioned above is
The ink adhered to the outer peripheral surface of the rollers of the ink roller group in the inking device is loosened by the cleaning oil, and then scraped off with a doctor and the waste ink can be collected in the ink reservoir. It is not a homogeneous liquid, but a mixture of a cleaning oil part that contains a small amount of ink, which is a fluid with high fluidity, and a sludge-like ink part that has been loosened by the cleaning oil but has poor fluidity, and it is a mixture of When discharging, the cleaning oil part with high fluidity is discharged smoothly, but the ink part with poor fluidity cannot follow the discharge of the cleaning oil part and remains in the ink reservoir. Therefore, the ink reservoir must be cleaned by removing the sludge-like ink accumulated in the ink reservoir every time or every time ink cleaning is performed.

In addition, the ink removal device in the inking device of the printing press described above is designed to scrape off the ink by pressing a doctor against the outer circumferential surface of the metal roller immediately after the ink has been transferred from the upstream side. When used, this results in an interruption of the ink supply to the printing plate. Therefore, it cannot be used during a printing operation, for example to remove dampening water that has entered the ink roller group in an offset printing press.

[Means to solve the problem]

The ink etc. wiping device in the inking device of a printing press according to the present invention has the following features in the ink transfer medium of the inking device:
A strip-shaped wiping material that contacts the ink-transferring surface directly or via another ink-carrying surface that contacts the ink-carrying surface after the ink transfer on the downstream side, and a pressing member that presses the wiping material against the ink-carrying surface. , and a driving means for displacing the wiping material in a direction perpendicular to the width direction.

Then, if necessary, the inking device may be provided with a cleaning liquid supplying means for directly supplying the cleaning liquid to an appropriate ink-carrying surface and/or a cleaning liquid supplying means for supplying the cleaning liquid to the strip-shaped wiping material. Further, on the downstream side, cleaning waste liquid is removed from the band-shaped wiping material after wiping directly to the ink-carrying surface after the ink transfer or via another ink-carrying surface in contact with the ink-carrying surface,
In addition, a cleaning waste liquid removal and recovery means for recovering the cleaning waste liquid may be provided.

[For production]

During printing operation of a printing press, the plate cylinder is supplied with ink by an inking device.

In this case, the wiping material is applied by the pressing member to the ink transfer surface of the ink transfer medium in the inking device after the ink has been transferred to the downstream side, either directly or via another ink transfer surface that comes into contact with this ink transfer surface. Press the wiping material. At this time, the wiping material is displaced in a direction perpendicular to the width direction by the driving means. Then, the ink carrier surface is wiped off with the wiping material.

The wiping action is performed on the ink transfer surface of the ink transfer medium in the inking device after the ink has been transferred to the downstream side, so that the plate cylinder is continuously supplied with ink by the inking device during printing operation. But it is possible.

Wiping off the ink carrier surface after printing is completed is performed by cutting off the ink supply to the ink transfer medium of the inking device and operating the printing press with the inking device separated from the printing plate surface.

Also, during printing on an offset printing press, dampening water that has entered or entered the inking device from the downstream side is transferred to the ink carrier surface after the ink has been transferred to the downstream side, and the wiping material is used to prevent this intrusion. Wipe off any dampening water. When the cleaning liquid supply means supplies the cleaning liquid directly to the appropriate ink-carrying surface or to the wiping material, the residual ink is loosened and wiped off easily.

Then, the cleaning waste liquid containing residual ink and the like impregnated in the band-shaped wiping material after wiping is removed from the wiping material by the cleaning waste liquid removal and recovery means, and is recovered. Thereby, wiping materials and cleaning fluids can also be regenerated.

〔Example〕

Embodiments of the invention will be described with reference to the drawings.

As an example of a printing press to which the ink wiping device in an inking device according to the present invention is applied, an offset printing press is schematically illustrated in FIGS. 1 to 17.

In an offset printing machine, the ink roller I is immersed in the ink fountain IF.
A roller row IT and a dampening water device DT are provided, which reach an ink forming roller IR' which contacts the printing plate on the plate cylinder PC via the roller R. The ink roller IR is provided with a doctor blade DB.

The ink wiping device includes one in which the wiping material comes into direct contact with the ink roller TR (see (a) in each of Figures 1 to 17), and one in which the wiping material comes into direct contact with the ink roller
The rollers are broadly classified into those that contact the roller R1 of the other roller row that contacts the roller R (see each (b) of FIGS. 1 to 17). In the illustrated embodiment, the media with the ink-carrying surface interposed between the wipe and the ink roller IR are two
Although the book rollers Rl and R2 are not necessarily rollers, the number thereof is also an appropriate number.

Furthermore, in both types, a certain wiping material is made of a strip-like material having sufficient strength and hygroscopicity, such as a non-woven fabric, a woven fabric, a composite material of Aja, or a composite material of these and a synthetic resin. (see Figs. 1 to 11), and an endless loop type second wiping material 2.
(See FIGS. 12 to 17).

In the first embodiments (a) and (b) shown in FIG. 1, the wiping material roll 1a in which the retractable first wiping material 1 is wound into a roll shape and the winding core shaft RT are paired. The winding core shaft RT is rotatably provided parallel to and close to the ink roller IR or roller R1, and the winding core shaft RT is driven by an electric motor M serving as a driving means through an appropriate mechanism so as to be rotationally driven.
is combined with

First wiping material 1 pulled out from wiping material roll 1a
The leading edge of the first wiping material 1 is attached to the winding core shaft RT, and the first wiping material 1 drawn out between the wiping material roll 1a and the winding core shaft RT is attached to the ink roller IR or the roller Rl.
an inflatable and deflated airbag-type L-th, which is disposed adjacent to and parallel to the outer circumferential surface of the
The first pressing member 3 presses the outer peripheral surface of the ink roller rR or the roller Rl. The second embodiment (a) shown in FIG. 2(a) is an ink roller! A first cleaning liquid supply means 4 is provided close to the ink roller JR on the upstream side of the pressing position of the first pressing member 3 in the rotational direction of R, and supplies cleaning liquid to the roller surface.
In the second embodiment (b) shown in FIG. 2(b), a first cleaning liquid supply means is provided close to the ink roller IR on the upstream side of the contact position in the rotational direction of the roller R2 of the roller row that contacts the ink roller IR. 4 is provided.

The first cleaning liquid supply stage 4 is connected to a cleaning liquid supply source (not shown). The third embodiment (a) and (b) shown in FIG. 3 includes a first cleaning liquid supplying means 4 that supplies cleaning liquid to the first wiping material 1 instead of the first cleaning liquid supplying means 4 of the second embodiment. Similar, second
A cleaning liquid supply means 5 is provided close to the inner surface of the first wiping material 1 between the wiping material roll 1a and the first pressing member 3. Fourth embodiment (a) (b) shown in FIG.
) is a cleaning liquid van P1 filled with cleaning liquid and a cleaning liquid pan P provided between the wiping material roll 1a and the first pressing member 3 instead of the second cleaning liquid supply stage 5 of the third embodiment.
A third cleaning liquid supplying means 6 is used, which includes a dipping roller DR that can take two positions, upper and lower, with its lower outer circumferential surface in the cleaning liquid and a position away from the cleaning liquid surface. The first wiping material 1 located between the roll 1a and the first pressing member 3 is wound around the dipping roller DR. When the immersion roller DR is in the lower position, the first wiping material 1 is adapted to pass through the cleaning liquid. The cleaning liquid pan PI is connected to a filtering or purifying means (not shown), and the cleaning liquid is circulated between them.WI!
It is preferable to refrain. 5th embodiment (a) and (b) shown in FIG. 5 are the second embodiment in which a first cleaning waste liquid recovery means 7 is provided for recovering a cleaning waste liquid that is a mixed liquid of a cleaning liquid and a wiping component. It is.

The first cleaning waste liquid recovery means 7 includes a pair of nip rollers NR provided between the first pressing member 3 and the winding core shaft RT.
, NR and a waste liquid collection pan P2 below it, and the first wiping material 1 located between the first pressing member 3 and the winding core @RT is pinched between a pair of nip rollers NR and NR. It is meant to pass. Waste liquid collection pan P
The second discharge port is connected via a discharge pipe D to a filtering or purifying means (not shown). In addition, by constantly retaining a certain amount of cleaning liquid in the waste liquid collection van P2 and circulating this cleaning liquid between the filtration and purification means,
The waste liquid can be more smoothly discharged from the discharge port.

In the sixth embodiment (aHb) shown in FIG. 6, a second cleaning liquid supply stage 5 is used in place of the first cleaning liquid supply means 4 of the fifth embodiment.

In the seventh embodiment (a) and (b) shown in FIG. 7, a third cleaning liquid supplying means 6 is used instead of the first cleaning liquid supplying means 4 of the fifth embodiment.
is used. The eighth embodiment (a) and (b) shown in FIG. 8 is provided above a pair of nip rollers NR, NR with respect to the first cleaning waste liquid recovery means 7, and is adapted to clean the first wiping material 1. A second washing waste liquid recovery means 9 to which a fourth washing liquid supply means 8 is added is provided in the first embodiment. The fourth cleaning liquid supply means 8 may be configured to be supplied with the cleaning liquid from a filtering or purifying means (not shown) connected to the discharge pipe D, and the fourth cleaning liquid supply means 8 may be configured to be connected to a pair of nip rollers NR. , may be added below NR. 9th
The ninth embodiment (a) and (b) shown in the figure are the same as the eighth embodiment.
A cleaning liquid supply means 4 is additionally provided.

The tenth embodiments (a) and (b) shown in FIG. 10 are the same as the eighth embodiment in which a second cleaning liquid supply stage 5 is added.

In the eleventh embodiments (a) and (b) shown in FIG. 11, a third cleaning liquid supply means 6 is added to the eighth embodiment.

In the twelfth embodiment (a) and (b) shown in FIG.
A fifth cleaning liquid supply means 10 is provided, which consists of a cleaning liquid bun P1 filled with cleaning liquid, a dipping roller DR in the cleaning liquid bun PI, and a pair of nip rollers NR, NR on the cleaning liquid pan PI, and further a second pressing roller in the form of a pressing roller. A member 11 is rotatably provided parallel to and adjacent to the ink roller IR or roller Rl.

The discharge port of the cleaning liquid van P1 is connected via a discharge pipe D to a filtering or purifying means (not shown).

Then, the endless loop type second wiping material 2 is wrapped around the dipping roller DR and the second pressing member l1, and the second pressing member 11 is used to ink the ink roller IR or the roller Rl.
It is pressed against the outer circumferential surface and is pinched and pressed between a pair of nip rollers NR, NR, so that it passes therethrough. Then, for example, the upstream nip roller NR around which the second wiping material 2 is wound is coupled to an electric motor M, which is a driving means, via an appropriate mechanism so as to be rotationally driven.

The drive source for rotating the second wiping material 2 is not limited to the upstream nip roller NR, but other rollers around which the second wiping material 2 is wound may be used.

The second pressing member 11 can move toward and away from the ink roller IR or the roller R1 by an appropriate mechanism, such as by rotating about the dipping roller DR as a fulcrum.

The fifth cleaning liquid supply means 10 is used for cleaning the second wiping material 2, and the cleaning liquid pan PI also serves as a waste liquid collection pan P2. The 13th embodiment (a) and (b) shown in FIG. 13 are the same as the 12th embodiment in which a first cleaning liquid supply means 4 is added. The fourteenth embodiment (a) and (b) shown in FIG. 14 are the same as the fourteenth embodiment in which a second cleaning liquid supply stage 5 is added. The fifteenth embodiment (a) and (b) shown in FIG. 15 are the same as those of the twelfth embodiment (a) and (b) except that a second washing waste liquid recovery means 9 is provided in place of the fifth washing liquid supply means 10. be.
In this case, the fourth cleaning liquid supply stage 8 is connected to the second wiping material 2
It is located opposite to the upstream nip roller NH around which it is wound.

The 16th embodiment (a) and (b) shown in FIG. 16 are the same as the 15th embodiment in which a first cleaning liquid supply means 4 is added.

In the seventeenth embodiment (a) and (b) shown in FIG. 17, a second cleaning liquid supply means 5 is added to the fifteenth embodiment.

In each of the above embodiments, the first pressing member 3 and the second pressing member 1l can be applied alternately, and the first cleaning liquid supply stage 4, the second cleaning liquid supply means 5 and the third cleaning liquid supply means The supply means 6 may be used in combination as appropriate. The first washing waste liquid recovery means 7, the second washing waste liquid recovery means 9, and the fifth washing liquid supply means 10} can be applied alternately and selectively.

The operation and function of the ink wiping device of the inking device applied to the above-mentioned offset printing machine will be explained.

During printing operation of the offset printing press, dampening water is supplied to the printing plate on the plate cylinder PC by the dampening water device DT, and the fountain roller FR,
Ink is supplied sequentially through each roller such as the ink roller IR and the ink form roller IR'. At that time, the expansion of the first pressing member 3 or the second pressing member 1l
The first wiping material 1 or the second wiping material 2 is pressed against the outer peripheral surface of the ink roller IR or the roller Rl by the displacement of (clockwise) to displace the first wiping material 1 or the second wiping material 2 at an appropriate speed in a direction opposite to the direction of rotation of the outer peripheral surface of the ink roller IR or roller R1. After the wiping action, the first wiping material 1 is sequentially wound around the winding core shaft RT, and the second
The wiping material 2 circulates and performs a wiping action. Thus, the ink roller IR after transferring the ink to the downstream side
The residual ink and dampening water are removed from the outer peripheral surface of the roller R1 to which the residual ink and dampening water have been transferred from the outer peripheral surface of the roller R1 or the outer peripheral surface of the ink roller IR, by the first wiping material 1 or the second wiping material 2 Wiped off. Note that the immersion roller DR of the third cleaning liquid supply means 6 in the fourth, seventh, and eleventh examples is pulled up to an upper position away from the cleaning liquid level, and isolates the first wiping material 1 from the cleaning liquid. Keep it. After printing is completed, the offset printing press is operated with the ink supply from the ink fountain IF to the fountain roller FR cut off and the ink form roller IR' separated from the printing plate of the plate cylinder PC. In this case as well, residual ink and dampening water are removed from the outer peripheral surface of roller R1 to which the residual ink and dampening water have been transferred from the outer peripheral surface of ink roller IR or the outer peripheral surface of its ink roller IH. First wiping material 1 or second wiping material 2
wiped away by

After the wiping action, the first wiping material 1 is sequentially wound around the winding core shaft RT, and the second wiping material 2 circulates and performs the wiping action.

The operation of each part such as the cleaning liquid supply means of each embodiment during the wiping operation of the first wiping material 1 or the second wiping material 2 will be described. The first cleaning liquid supply means 4 supplies the cleaning liquid directly to the outer circumferential surface of the ink roller IR or indirectly through the outer circumferential surface of the ink roller IR, and residual ink adhering to the outer circumferential surface of the ink roller IR is loosened by the cleaning liquid. , and immediately thereafter wiped off with the first wiping material 1 or the second wiping material 2 as described above. The second cleaning liquid supply means 5 supplies the cleaning liquid to the displaced first wiping material 1 or the second wiping material 2 to impregnate it, and the first wiping material 1 or the second wiping material 2 impregnated with the cleaning liquid is the same as above. Wipe it off. The third cleaning liquid supply means 6 sets the dipping roller DR to a lower position where its lower outer peripheral surface is in the cleaning liquid, guides the displaced first wiping material 1 into the cleaning liquid to impregnate it with the cleaning liquid, and the cleaning liquid is The impregnated first wiping material 1 is wiped off in the same manner as described above.

According to the first wiping material 1 or the second wiping material 2 impregnated with a cleaning liquid, residual ink is transferred from the outer peripheral surface of the ink roller IR or the outer peripheral surface of the ink roller IH to which the residual ink is transferred. wiping becomes even more effective.

In the first cleaning waste liquid collection stage 7, after the first wiping material 1 impregnated with the cleaning liquid wipes off residual ink, etc., it is clamped between a pair of nip rollers NR, NR, and the first wiping material 1 is
The cleaning liquid containing a certain amount of wiping material (residual ink, etc.), that is, the cleaning waste liquid, is squeezed out from the wiping material 1 and sent to the waste liquid collection van P.
It is accepted as 2. Then, the cleaning waste liquid flows out from the outlet of the waste liquid recovery pan P2 through the discharge pipe D to a filtering or purifying means (not shown), is filtered or purified, and the cleaning liquid is regenerated.

In the second cleaning waste liquid recovery means 9, after the first wiping material 1 not impregnated with the cleaning liquid or the first wiping material 1 impregnated with the cleaning liquid wipes off the residual ink, it is transferred to the fourth cleaning liquid supply stage 8, A cleaning liquid is supplied to the first wiping material 1,
Subsequently, the first wiping material 1 is squeezed between a pair of nip rollers NR, NR, and the cleaning liquid containing the wiping component, that is, the cleaning waste liquid, is squeezed out and received by the waste liquid collection pan P2. The cleaning liquid flows out from the discharge port of the waste liquid collection van P2 through the discharge pipe D to a filtering or purifying means (not shown), and the filtered, purified and regenerated cleaning liquid is circulated and supplied to the first wiping material 1 by the fourth cleaning liquid supply means 8. is supplied to Therefore, the residual ink in the squeezed cleaning waste liquid is further diluted, and the residual ink can be discharged without settling into the waste liquid collection van P2.

In the fifth cleaning liquid supply means 10, the second wiping material 2 not impregnated with the cleaning liquid or the second wiping material 2 impregnated with the cleaning liquid
After wiping off the residual ink, the wiping material 2 is guided into the cleaning liquid of the cleaning liquid pan P1 by the dipping roller DR, and is cleaned by the cleaning liquid.

Then, at a point away from the cleaning liquid surface, it is squeezed between a pair of nip rollers NR, NR, and the cleaning liquid containing the wiping liquid, that is, the cleaning waste liquid, is squeezed out from the second wiping liquid 2, and the cleaning liquid van PI can be accepted.

Therefore, the squeezed out washing waste liquid, that is, the residual ink, is further diluted by the washing liquid in the washing liquid bun Pl which also serves as the waste liquid collection van P2, and can be discharged without being precipitated.

Then, the cleaning liquid containing the algae washing waste liquid flows out from the outlet of the cleaning liquid pan P1 through the discharge pipe D to a filtering or purifying means (not shown), is filtered or purified, and the cleaning liquid is regenerated.

The printing machine in the above embodiment is an offset printing machine, but it may be any other printing machine, and the inking device is not limited to the roller row as in the embodiment, but may also be other than that, such as an endless loop belt. It may be something that is included.

[Effects of the Invention] According to the ink wiping device in the inking device of a printing press of the present invention, residual ink on the ink transfer medium in the inking device of a printing press can be effectively and automatically wiped off without any particular manual effort. be able to.

Furthermore, since the residual ink in the cleaning waste liquid containing the wiping liquid after wiping is diluted almost uniformly with the cleaning liquid, it can be smoothly discharged from the waste liquid collection pan. Since no ink remains, the operator is freed from cleaning the waste collection pan.

Furthermore, the wiping action is possible not only after the printing press has started printing, but also during the printing operation, even when the inking device is continuously supplying ink to the printing plate on the plate cylinder. In some cases, the dampening water transferred to the ink carrier surface after the ink transfer to the downstream side during printing, which has entered or entered the inking device, can also be wiped away, thereby preventing unnecessary water damage on the printing surface. This can prevent deterioration in print quality.

[Brief explanation of drawings]

1 to 17 are schematic diagrams showing first to seventeenth embodiments in which an ink wiping device in an inking device according to the present invention is applied to an offset printing press. 1: First wiping material 1a: Wiping material roll 2: Second wiping material 3: First pressing member 4; First cleaning liquid supply means 5: Second cleaning liquid supply stage 6: Third cleaning liquid supply means 7: First cleaning Waste liquid recovery means 8: Fourth cleaning liquid supply means 9: Second cleaning waste liquid recovery means jO: Fifth cleaning liquid supply means 1l: Second pressing member RT: Winding core shaft M: 11 motive Pl: Cleaning liquid pan P2. Waste liquid collection pan D=Discharge pipe DR: Dipping roller NR: Nip roller IF: Ink fountain FR: Fountain roller IR: Ink roller DB: Doctor blade rR': Ink form roller PC second plate cylinder Rl, R2: Roller IT: Roller row DT: Dampening water device

Claims (2)

[Claims] (1) A strip-shaped wiping material that contacts the ink transfer surface of the ink transfer medium of the inking device after ink transfer on the downstream side, either directly or through another medium surface that contacts this ink transfer surface, and a wiping material. An ink wiping device in an inking device of a printing press, comprising a pressing member that presses against an ink-carrying surface and a driving means that displaces a wiping material in a direction perpendicular to its width direction. (2) The method according to claim (1), comprising a cleaning liquid supply means for directly supplying the cleaning liquid to a suitable ink-carrying surface of the inking device and/or a cleaning liquid supply means for supplying the cleaning liquid to the strip-shaped wiping material. Wiping device for ink, etc. in the inking device of a printing press (3) Wiping off the ink transfer medium of the inking device directly or via another medium contacting the ink transfer surface after the ink has been transferred to the downstream side. The ink, etc. wiping device in an inking device of a printing press according to claim (2), further comprising a cleaning waste liquid removal and collection means for removing and recovering the cleaning waste liquid from the strip-shaped wiping material after performing the above.