JP2761941B2 - Ink wiping device for printing press - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for wiping ink or the like in an ink device of a printing press.

[Conventional technology]

2. Description of the Related Art As an ink removing device in an ink device of a printing press according to the related art, there is, for example, an apparatus described in Japanese Utility Model Laid-Open No. 61-109735.

In this device, a doctor is attached to one upper part of a side wall extending in a longitudinal direction, and is rotatable at a fulcrum provided on a bottom part.
The doctor is pressed and separated from the metal roller of the ink roller group by rotating the ink reservoir provided detachably, and the ink roller group is provided above the ink roller group. An automatic spraying device for spraying the cleaning oil is provided.

Then, the doctor was pressed against the metal roller to operate the printing press, and at the same time, the washing oil was sprayed onto the ink roller group, and the waste ink loosened by the washing oil was collected in the ink reservoir by the doctor and attached to the ink reservoir. It is discharged from the discharge pipe.

[Problems to be solved by the invention]

The ink removal device in the ink unit of the above printing press uses the cleaning oil to loosen the ink adhering to the outer peripheral surface of the ink roller group, which is an inking unit, with the cleaning oil, scrapes it with a doctor, and collects waste ink in the ink reservoir. However, the collected waste ink is not a uniform liquid, but a cleaning oil portion containing a small amount of ink, which is a liquid with high fluidity, and a sludge that is loosened by the cleaning oil but has poor fluidity. It is a mixture with the ink portion in the form of a liquid, and the discharge of the washing oil portion, which is rich in fluidity, is
The ink portion, which is performed smoothly but has poor fluidity, cannot follow the discharge of the cleaning oil portion and remains in the ink reservoir.
Therefore, every time, or every several times of ink washing,
It is necessary to clean the ink reservoir by removing the sludge-like ink accumulated in the ink reservoir.

The ink removing device in the inking device of the printing press described above is used during a printing operation because the doctor is pressed against the outer peripheral surface of the metal roller immediately after the ink is transferred from the upstream side to scrape the ink. This results in interruption of the ink supply to the plate. Therefore, it cannot be used during a printing operation, for example in an offset printing press, to remove fountain solution that has entered the group of ink rollers.

[Means for solving the problem]

The ink wiping device in the inking device of the printing press according to the present invention is an ink wiping device in an ink transfer medium of the inking device
A band-shaped wiping material that comes into contact with the ink-carrying surface after ink transfer to the downstream side and before ink transfer from the upstream side directly or via another medium-side surface that abuts the ink-carrying surface; and after printing is completed. A cleaning liquid supply unit comprising a cleaning liquid supply unit for supplying the cleaning liquid directly to an appropriate ink mediating surface of the inking device and / or a cleaning liquid supply unit for supplying the cleaning liquid to the band-shaped wiping material in a state where the ink supply is cut off; The pressing member that presses the wiping material against the ink mediating surface, and the width direction of the band-shaped wiping material in the wiping of the ink mediating surface during the printing operation and the wiping of the ink mediating surface in a state where the ink supply is shut off after printing is completed And a drive means for displacing in a right angle direction, so that wiping can be performed both during the printing operation and after the printing is completed. Further, a cleaning waste liquid removing and recovering means for removing and recovering the cleaning waste liquid from the strip-shaped wiping material after wiping off the ink supply after printing and supplying the cleaning liquid may be provided.

[Action]

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

At this time, the wiping material is moved by the pressing member to the ink transfer surface of the ink transfer medium in the inking device after the ink transfer to the downstream side and before the ink transfer from the upstream side, directly or to the ink transfer surface. The wiping material is pressed by the pressing member via the other ink mediating surface that is in contact.
At that time, the wiping material is displaced in a direction perpendicular to the width direction by the driving means. Then, the wiping member wipes the ink-carrying surface.

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

The wiping of the ink mediating surface after printing is performed by operating the printing machine with the ink supply to the ink transfer medium of the inking unit shut off and the inking unit separated from the plate surface.

Also, during printing by the offset printing press, the dampening solution that has entered or entered the inking device is transferred from the downstream side to the ink mediating surface after the ink transfer to the downstream side. Wipe off the dampening water that has entered.

When the cleaning liquid is directly supplied to the appropriate ink mediating surface by the cleaning liquid supply means or the cleaning liquid is supplied to the wiping member, the residual ink is loosened and wiping is facilitated.

Then, the cleaning waste liquid containing residual ink and the like impregnated in the strip-shaped wiping material after wiping by the cleaning waste liquid removing and collecting means is removed from the wiping material and collected. Thereby, the wiping material and the cleaning liquid can be regenerated.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 to 17 schematically show an offset printing machine as an example of a printing machine to which a device for wiping ink or the like in an inking device according to the present invention is applied.

The offset printing press includes an ink applicator roller IR ′ that contacts the plate on the plate cylinder PC from the fountain roller FR immersed in the ink fountain IF via the ink roller IR.
, And a damper device DT. The ink roller IR is provided with a Dokler blade DB.

The ink wiping device includes an ink roller after the wiping material (the first wiping material 1 and the second wiping material 2) comes into contact with the downstream ink application roller IR 'and before it comes into contact with the upstream fountain roller FR. The type provided so as to directly contact the outer peripheral surface of the IR (see each (a) of FIGS. 1 to 17) and the wiping material (the first wiping material 1 and the second wiping material 2) are provided downstream. After being in contact with the ink application roller IR ′ on the side and before contacting the fountain roller FR on the upstream side, it is provided so as to be in contact with the outer peripheral surface of the roller R1 of another roller row that contacts the outer peripheral surface of the ink roller IR. Type (see FIGS. 1 to 17 (b)).

In the embodiment shown, the media having an ink-bearing surface interposed between the wiping material and the ink roller IR is 2
The rollers R1 and R2 of the book are not limited to the rollers, and the number thereof is an appropriate number.

Furthermore, in both types, a wiping material formed of a strip having sufficient strength and hygroscopicity, such as a nonwoven fabric, a woven fabric, or a composite material of the two, or a composite material thereof and a synthetic resin, is a roll-up type. 1 is a wiping material 1 (see FIGS. 1 to 11) and an endless loop-type second wiping material 2
(See FIGS. 12 to 17).

In the first embodiment (a) and (b) shown in FIG. 1, a wiping member roll 1a in which a first wiping member 1 of a winding type is wound in a roll shape and a winding core shaft RT are paired. The winding core shaft RT is rotatably provided in parallel with and close to the ink roller IR or the roller R1. The winding core shaft RT is coupled to an electric motor M as a driving unit via an appropriate mechanism so as to be driven to rotate. I have. The leading edge of the first wiping member 1 pulled out from the wiping member roll 1a is attached to the winding core shaft RT, and the first wiping member 1 is pulled out between the wiping member roll 1a and the winding core shaft RT.
The wiping material 1 is provided adjacent to and parallel to the outer peripheral surface of the ink roller IR or the roller -R1, and has a length that is at least the width dimension of the ink-carrying surface of the ink roller IR or the roller R1. It is sandwiched between the first pressing member 3 of the air bag type and is pressed against the outer peripheral surface of the ink roller IR or the roller R1 by the first pressing member 3.

In the second embodiment (a) shown in FIG. 2 (a), the cleaning liquid is supplied to the roller surface in the rotation direction of the ink roller IR and close to the ink roller IR on the upstream side of the pressing position of the first pressing member 3. A first cleaning liquid supply means 4 is provided,
The second embodiment (b) shown in FIG.
The first cleaning liquid supply means 4 is provided adjacent to the ink roller IR on the upstream side of the contact position in the rotation direction of the roller R2 of the roller row that comes into contact with the first roller.

The first cleaning liquid supply means 4 is connected to a cleaning liquid supply source (not shown).

In the third embodiment (a) and (b) shown in FIG. 3, a cleaning liquid is supplied to the first wiping member 1 instead of the first cleaning liquid supply means 4 of the second embodiment. A second cleaning liquid supply means 5 similar to the first cleaning liquid supply means 4 is provided near the inner surface of the first wiping material 1 between the wiping material roll 1a and the first pressing member 3.

In the fourth embodiment (a) and (b) shown in FIG. 4, a wiping material roll 1a is used instead of the second cleaning liquid supply means 5 of the third embodiment.
A cleaning liquid pan P1 which is provided in the middle between the cleaning liquid pan and the first pressing member 3; A third cleaning liquid supply means 6 comprising an immersion roller DR capable of taking a position is used, and the wiping material roll 1a is used.
First wiping member 1 in the middle between the first pressing member 3
Is wound around the immersion roller DR. Immersion roller
When the DR is at the downstream position, the first wiping material 1 passes through the cleaning liquid.

It is preferable to connect the cleaning liquid pan P1 to a filtering or purifying means (not shown) so that the cleaning liquid circulates between them.

The fifth embodiment (a) and (b) shown in FIG. 5 is different from the second embodiment in that a first cleaning waste liquid collecting means 7 for collecting a cleaning waste liquid which is a mixed liquid of a cleaning liquid and a wiping component is provided. It is.

The first washing waste liquid collecting means 7 includes a pair of nip rollers NR, N provided between the first pressing member 3 and the winding core shaft RT.
R and a waste liquid recovery pan P2 therebelow, and a first wiping member 1 intermediate the first pressing member 3 and the winding core shaft RT.
Is pinched between a pair of nip rollers NR, NR and passes therethrough. The outlet of the waste liquid recovery pan P2 is connected to a not-shown filtration or purification means via a discharge pipe D. It should be noted that while constantly maintaining a constant amount of the cleaning liquid in the waste liquid recovery pan P2, the cleaning liquid is circulated between the filtration and purification means so that the waste liquid can be more smoothly discharged from the discharge port. Can be.

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

In the eighth embodiment (a) and (b) shown in FIG. 8, the first cleaning waste liquid collecting means 7 is provided above the pair of nip rollers NR, NR to clean the first wiping member 1. The second cleaning waste liquid collecting means 9 to which the fourth cleaning liquid supply means 8 is added is provided in the first embodiment. The fourth cleaning liquid supply means 8 may be configured to supply the cleaning liquid from a filtration or purification means (not shown) connected to the discharge pipe D, and the fourth cleaning liquid supply means 8 may include a pair of nip rollers NR. , NR may be added below.

In the ninth embodiment (a) and (b) shown in FIG. 9, the first cleaning liquid supply means 4 is added to the eighth embodiment.

In the tenth embodiment (a) and (b) shown in FIG. 10, the second cleaning liquid supply means 5 is added to the eighth embodiment.

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

In the twelfth embodiment (a) and (b) shown in FIG. 12, the cleaning liquid pan P1 filled with the cleaning liquid, the immersion roller DR in the cleaning liquid pan P1, and the pair of nip rollers NR, N on the cleaning liquid pan P1 are used.
A fifth cleaning liquid supply means 10 comprising R is provided, and a second pressing member 11 in the form of a pressing roller is rotatably provided in parallel with and adjacent to the ink roller IR or the roller R1. The discharge port of the cleaning liquid pan P1 is connected to a not-shown filtering or purifying means via a discharge pipe D.

Then, the endless leaping type second wiping material 2 is wound around the immersion roller DR and the second pressing member 11, and is pressed against the outer peripheral surface of the ink roller IR or the roller R1 by the second pressing member 11, In addition, a pair of nip rollers NR, NR are pinched and pass therethrough. Then, for example, the upstream nip roller NR around which the second wiping member 2 is wound is connected to the electric motor M as driving means via an appropriate mechanism so as to be driven to rotate.

The driving source for the rotation of the second wiping member 2 is not limited to the nip roller NR on the upstream side, and another roller around which the second wiping member 2 is wound can be used.

The second pressing member 11 can be brought into contact with or separated from the ink roller IR or the roller R1 by an appropriate mechanism such as turning around the immersion roller DR as a fulcrum.

The fifth cleaning liquid supply means 10 is used for cleaning the second wiping member 2, and the cleaning liquid pan P1 also serves as a waste liquid recovery pan P2.

In the thirteenth embodiment (a) and (b) shown in FIG. 13, the first cleaning liquid supply means 4 is added to the twelfth embodiment.

In the fourteenth embodiment (a) and (b) shown in FIG. 14, the second cleaning liquid supply means 5 is added to the fourteenth embodiment.

In the fifteenth embodiment (a) and (b) shown in FIG. 15, a second cleaning waste liquid collecting means 9 is provided instead of the fifth cleaning liquid supply means 10 in the twelfth embodiments (a) and (b). is there. In this case, the fourth cleaning liquid supply means 8 is located at a position facing the nip roller NR on the upstream side around which the second wiping member 2 is wound.

In the sixteenth embodiment (a) and (b) shown in FIG. 16, the first cleaning liquid supply means 4 is added to the fifteenth embodiment.

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

In the above embodiments, the first pressing member 3 and the second pressing member 11 can be applied alternatively and selectively, so that the first cleaning liquid supply means 4, the second cleaning liquid supply means 5, and the third cleaning liquid supply Means 6 can be used in combination as appropriate.

The first cleaning waste liquid collecting means 7, the second cleaning waste liquid collecting means 9, and the fifth cleaning liquid supplying means 10 can be applied alternatively and selectively.

The operation and operation of the ink wiping device of the ink device applied to the offset printing press will be described.

During the printing operation of the offset printing press, the printing plate on the plate cylinder PC is supplied with fountain solution by the fountain solution device DT, and from the ink fountain IF to the fountain roller FR, the ink roller IR, and the ink setting roller IR ′. The ink is supplied through the rollers sequentially.

At this time, the expansion of the first pressing member 3 or the second pressing member 11
The first wiping member 1 or the second wiping member 2 is pressed against the outer peripheral surface of the ink roller IR or the roller R1 by the displacement of the roller, and the electric motor M is driven to drive the winding core shaft RT or the nip roller NR (the illustrated example). Now rotate clockwise)
Use wiping material 1 or second wiping material 2 with ink roller IR
Alternatively, the roller is displaced at an appropriate speed in a direction opposite to the rotation direction of the outer peripheral surface of the roller R1. After the wiping action, the first wiping member 1 is sequentially wound around the winding core shaft RT, and the second wiping member 2
Circulates and performs a wiping action. Thus, the residual ink and the penetrating dampening water are transferred from the outer peripheral surface of the ink roller IR after transfer of the ink to the downstream side or from the outer peripheral surface of the roller R1 to which the residual ink and the penetrating dampening water have been transferred from the peripheral surface of the ink roller IR. Water is wiped off by the first wiping material 1 or the second wiping material 2. The fourth embodiment, the seventh embodiment, and the
Immersion roller of third cleaning liquid supply means 6 in 11th embodiment
The DR is pulled up to an upper position away from the cleaning liquid level, and the first
The wiping material 1 is set apart from the cleaning liquid.

After the printing is completed, the offset printing press is operated with the ink fountain IF cut off the ink supply to the fountain roller FR and the ink forming roller IR 'separated from the printing plate of the plate cylinder PC. Then, also in this case, the residual ink and the penetrating dampening water are transferred from the outer peripheral surface of the roller R1 to which the residual ink and the penetrating dampening water have been transferred from the outer peripheral surface of the ink roller IR or the outer peripheral surface of the ink roller IR. It is wiped by the first wiping member 1 or the second wiping member 2.

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 member 1 or the second wiping member 2 will be described.

The first cleaning liquid supply means 4 supplies the cleaning liquid directly to the outer peripheral surface of the ink roller IR or indirectly through the outer peripheral surface of the ink roller IR, and the residual ink attached to the outer peripheral surface of the ink roller IR is loosened by the cleaning liquid. , Immediately after the first
The wiping material 1 or the second wiping material 2 is used to wipe off as described above.

The second cleaning liquid supply means 5 includes a displaced first wiping material 1.
Alternatively, the cleaning liquid is supplied to and impregnated in the second wiping member 2, and the first wiping member 1 or the second wiping member 2 impregnated with the cleaning liquid.
Performs wiping in the same manner as described above.

The third cleaning liquid supply means 6 sets the position of the immersion roller DR to a lower position where the lower outer peripheral surface is in the cleaning liquid, guides the displaced first wiping member 1 into the cleaning liquid, impregnates the cleaning liquid, and impregnates the cleaning liquid. The impregnated first wiping member 1 is wiped in the same manner as described above.

According to the first wiping material 1 or the second wiping material 2 impregnated with the cleaning liquid, the residual ink from the outer peripheral surface of the ink roller IR or the outer peripheral surface of the roller R1 to which the residual ink has been transferred from the outer peripheral surface of the ink roller IR. Wiping is more effective.

In the first cleaning waste liquid collecting means 7, after the first wiping material 1 impregnated with the cleaning liquid wipes off residual ink and the like,
A cleaning liquid containing a wiping component (such as residual ink), ie, a cleaning waste liquid, is squeezed out of the first wiping member 1 by being pressed between the pair of nip rollers NR, NR, and received by the waste liquid recovery pan P2. Then, the cleaning waste liquid flows out of the discharge port of the waste liquid recovery pan P2 through the discharge pipe D to the not-shown filtration or purification means, where it is filtered or purified, and the cleaning liquid is regenerated.

In the second cleaning waste liquid collecting means 9, the first wiping member 1 not impregnated with the cleaning liquid or the first wiping material impregnated with the cleaning liquid is used.
After the wiping member 1 wipes off the residual ink, the cleaning liquid is supplied to the first wiping member 1 by the fourth cleaning liquid supply means 8, and subsequently, the wiping member is nipped between the pair of nip rollers NR, NR, and A cleaning liquid containing a wiping component, ie, a cleaning waste liquid, is squeezed out of the wiping material 1 and received by the waste liquid recovery pan P2. The cleaning liquid which has flowed out from the discharge port of the waste liquid recovery pan P2 to a filtration or purification means (not shown) via a discharge pipe D, and which has been filtered or purified and regenerated is circulated and circulated by the fourth cleaning liquid supply means 8 to the first wiping material 1. Supplied to

Therefore, in the squeezed cleaning waste liquid, the residual ink is further diluted, and the residual ink can be discharged without settling in the waste liquid recovery pan P2.

In the fifth cleaning liquid supply means 10, the second wiping member 2 not impregnated with the cleaning liquid or the second wiping material impregnated with the cleaning liquid is used.
After wiping the residual ink, the wiping member 2 is guided into the cleaning liquid in the cleaning liquid pan P1 by the immersion roller DR, and is cleaned by the cleaning liquid. Then, at a position away from the cleaning liquid surface, the cleaning liquid containing the wiping component, that is, the cleaning waste liquid, that is, the cleaning liquid containing the wiping component is squeezed out from the second wiping member 2 by being squeezed between the pair of nip rollers NR, NR, and is squeezed into the cleaning liquid pan P1 Can be received.

Therefore, the squeezed washing waste liquid, that is, the residual ink,
The washing liquid in the washing liquid pan P1 also serving as the waste liquid collecting pan P2 can be further diluted and discharged without settling.

Then, the cleaning liquid containing the cleaning waste liquid flows out of the discharge port of the cleaning liquid pan P1 through the discharge pipe D to the not-shown filtration or purification means, where it is filtered or purified, and the cleaning liquid is regenerated.

Although the printing press in the above-described embodiment is an offset printing press, it may be another printing press, and the inking device is not limited to the roller row as in the embodiment, but may include other devices such as an endless loop belt. It may be included.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to the wiping apparatus of the ink in the inking device of a printing press of this invention, the residual ink of the ink transfer medium in the inking device of a printing press can be wiped off effectively and automatically without special labor.

Furthermore, the cleaning waste liquid containing the wiping component after wiping is
Since the residual ink is almost uniformly diluted with the cleaning liquid, it can be smoothly discharged from the waste liquid collecting pan, so that no sludge-like ink remains in the waste liquid collecting pan. Freed from washing.

Moreover, not only after the printing operation of the printing press but also during the printing operation, the wiping action can be performed even when the ink is continuously supplied to the printing plate on the plate cylinder by the inking device. In addition, it is possible to wipe off the dampening solution that has entered the inking unit or that has entered the inking unit, which is transferred to the downstream side of the ink after ink transfer during printing, thereby preventing unnecessary drainage of the printing surface. In addition, deterioration of print quality can be prevented.

[Brief description of the drawings]

FIGS. 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: 1st wiping material, 1a: wiping material roll 2: 2nd wiping material, 3: 1st pressing member 4: 1st cleaning liquid supply means, 5: 2nd cleaning liquid supply means 6: 3rd cleaning liquid supply means 7: 1st 1 Cleaning waste liquid collecting means 8: Fourth cleaning liquid supply means 9: Second cleaning waste liquid collecting means 10: Fifth cleaning liquid supply means, 11: Second pressing member RT: Winding core shaft, M: Electric motor, P1: Cleaning liquid pan P2 : Waste liquid recovery pan, D: Discharge tube, DR: Immersion roller NR: Nip roller, IF: Ink fountain FR: Fountain roller, IR: Ink roller DR: Doctor blade, IR ': Ink roller PC: Plate cylinder, R1, R2: Roller, IT: Roller row DT: Dampening device

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B41F 35/04 B41F 31/02

Claims (2)

(57) [Claims] 1. An ink transfer surface of an ink transfer medium of an inking unit, which is directly or in contact with the ink transfer surface after ink transfer to a downstream side and before ink transfer from an upstream side. A cleaning liquid supply unit for supplying the cleaning liquid and a cleaning liquid directly to an appropriate ink mediating surface of the inking unit and a cleaning liquid supply unit for supplying the cleaning liquid to the belt-shaped wiping material in a state where the ink supply is interrupted after printing is completed; or A cleaning liquid supply means comprising any one of the above, a pressing member for pressing the strip-shaped wiping material against the ink medium surface, and an ink medium surface in a state where the ink supply is interrupted after the wiping of the ink medium surface during the printing operation and the end of printing. Driving means for displacing the strip-shaped wiping material in a direction perpendicular to the width direction of the wiping material during the wiping, and during the printing operation and after the printing is completed. An ink wiping device for an ink device of a printing press capable of wiping both. 2. The printing method according to claim 1, further comprising a cleaning waste liquid removing / recovering means for removing and recovering the cleaning waste liquid from the strip-shaped wiping material after wiping at the time of ink supply shutoff after printing and supply of the cleaning liquid. Equipment for wiping ink etc. in the ink unit of the machine.