JP2009113429A - Ink mist recovery system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink mist recovery system which recovers an ink mist generated among ink rollers of an inking apparatus covered with a cover regarding a printing unit, the ink mist recovery system being capable of preventing the ink mist generated and dispersed inside the cover from being released out of a machine, and to prevent the ink mist from adhering to the inner wall of the cover, a frame inside the cover, or the like. <P>SOLUTION: The ink mist recovery system comprises the cover 10 which surrounds the ink rollers 4 of the printing unit 2, outlets 30A and 30B that are provided by partially opening the cover 10, and an air stream generating device 20 for generating an air stream which flows towards the outlets 30A and 30B, along the inner wall surface of the cover 10, from at least a portion between the cover 10 and an proximity roller, the proximity roller being a roller among the rollers 4 which is proximal to the cover 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ink mist collecting device for collecting ink mist generated between ink rollers of an inking device covered with a cover in a printing unit.

  In a printing machine that performs printing using ink, the ink supplied to the ink source roller is passed through a number of ink rollers (ink roller group) in the inking device of each printing unit, and some ink rollers are axially moved. The ink is supplied to the printing cylinder (plate cylinder or blanket cylinder) while uniformly kneading the ink. Each printing unit is provided with a cover (so-called safety cover) that covers the inking device so that an operator does not accidentally contact the ink roller or the like.

By the way, at the time of ink supply, the ink kneaded by the roller at the nip exit between each ink roller of the inking device causes stringing, which is cut and fine particulate ink mist is generated.
Since the inking device is covered with a cover, such ink mist can be prevented from being released to the outside of the printing unit to some extent, but in general, since a gap for heat dissipation is formed in the cover, a part of the ink mist is It inevitably leaks outside the cover.

In other words, heat is generated inside the cover due to the rotation of a large number of ink rollers, etc., and this heat raises the ink temperature and lowers the viscosity of the ink, causing fluctuations in the ink supply amount and adversely affecting print quality. Therefore, the cover is usually provided with a gap from the viewpoint of releasing the heat generated inside the cover to the outside.
However, such a gap escapes the heat inside the cover to the outside, and at the same time, leaks the ink mist inside the cover as described above.

The ink mist leaked to the outside enters the inside of another adjacent printing unit, particularly when the printing unit into which the ink mist has entered is stopped, and accumulates in the lower part of the stopped roller or other narrow space. However, since it may cause trouble in subsequent printing, it is desired to avoid such leakage of ink mist.
Also, ink mist inside the cover that does not leak to the outside adheres to and accumulates on the inner wall of the cover, the frame inside the cover, and the like, thereby hindering printing. In particular, when ink mist is deposited and grows on a specific part of the inner wall of the cover, the liquefied ink mist travels along the deposited portion and drops onto the printing paper, or the deposited ink stain itself contacts the inking device or the like. This may cause a problem in printing.

  As a technique relating to such ink mist processing, Patent Document 1 considers that the accumulation of ink mist is the cause of ink mist accumulation, and between the left and right printing couples or between the upper and lower printing couples. There has been proposed a technique in which a blower fan is provided on one side in the printing width direction so that water vapor or mist staying or rising is blown and diffused to the other side by blowing with the blower fan.

In addition, as a technique in an ink jet printer (printer) rather than a printer using the inking device as described above, Patent Documents 2 and 3 disclose that the ink ejected from the discharge nozzle is a fine ink mist. Since it floats in the fuselage and adheres to equipment in the fuselage, it uses a fan motor for heat dissipation of electronic parts to suck ink mist in the fuselage and discharge it outside the fuselage. Technology has been proposed.
JP 2006-142582 A JP 2000-2111163 A JP 2004-276340 A

  However, as in the technique of Patent Document 1, in the technique in which ink mist is flown and diffused by blowing air inside the cover, it is possible to suppress ink accumulation in a staying portion or the like, but ink mist remains inside the cover. Eventually, it is impossible to avoid the deposition of ink mist on the inner wall of the cover, the frame inside the cover, etc., and periodic cleaning or the like is frequently required for the inner wall of the cover or the frame inside the cover.

  In addition, since the techniques of Patent Documents 2 and 3 are ink jet printers and the viscosity of the ink is low, it is considered that the ink mist in the machine body can be discharged out of the machine body by suction. The ink used in this inking device has a certain level of viscosity and is in the form of particles with a certain size, so it cannot be recovered sufficiently even if it is sucked from the outside of the machine. Regular cleaning of the inner wall and the frame inside the cover is required frequently.

Furthermore, it is desired to prevent leakage of the ink mist inside the cover to the outside as much as possible. However, Patent Documents 1 to 3 do not make any active technical proposals in this respect.
The present invention has been devised in view of such problems, with respect to fine particle-shaped ink mist that is generated and scattered when the ink is spun in an inking device provided inside the cover. It is an object of the present invention to provide an ink mist collecting device that can prevent the release to the outside of the machine and the adhesion to the inner wall of the cover, the frame inside the cover, and the like.

  In order to achieve the above object, a first ink mist collecting device according to the present invention (Claim 1) includes a cover surrounding an ink roller group of an inking device of a printing unit, and a part of the cover being opened. An air flow directed toward the discharge port along the inner wall surface of the cover is generated from the provided discharge port and at least a position between the cover and the proximity roller adjacent to the cover in the ink roller group. It is characterized by having an air flow generator.

It is preferable that the discharge port is provided in a downstream portion where an air flow generated by the rotation of the ink roller group reaches in the space in the cover.
In this case, it is preferable that only one outlet is provided in the downstream portion.
The cover is divided at a bent part between the approaching point of the proximity roller and the discharge port, and the airflow generator is arranged at the approaching point and the bent part, respectively, and heads toward the discharge port. It is preferable to have an injection port for injecting an air flow.

  The cover includes a main cover portion extending in one direction toward the discharge port, and the main cover portion is divided into a plurality of cover portions, and each cover portion is shifted stepwise toward the discharge port. Preferably, the airflow generator has an injection port that is arranged between the cover portions and injects an airflow toward the discharge port (Claim 5). ).

It is preferable that a non-adhesive material for preventing adhesion of ink mist inside the cover is provided on the inner wall surface of the cover.
It is preferable that an auxiliary air injection device that injects auxiliary air toward the direction away from the inner wall surface is provided on the inner wall surface of the cover.
It is preferable that the cover has no opening other than each installation location of the injection port that is provided in the discharge port and the air flow generation device and injects an air flow toward the discharge port. .

  A second ink mist collecting device according to the present invention (Claim 9) includes a cover that surrounds an ink roller group of an inking device of a printing unit, a discharge port that is provided in an opening in a part of the cover, and at least A film disposed so as to be movable toward the discharge port along the inner wall surface of the cover from a position in the cover adjacent to any one of the rollers of the ink roller group. The ink mist is collected by adhering to the film.

It is preferable that a removal device for removing the ink mist adhering to the film is provided at the discharge port.
It is preferable that the film is configured such that the ink mist adheres by adhesive force, and the removing device wipes and removes the ink mist adhered to the film.
The film is configured to be electrically collected by charging the ink mist, and the removing device preferably wipes and removes the ink mist adhered to the film while discharging the film. Item 12).

  Further, the exhaust port is provided with an exhaust device for promoting exhaust, and the cover includes an installation location of the exhaust port where the downstream end of the film is disposed and the proximity roller where the upstream end of the film is disposed It is preferable that there is no opening other than the portion between the cover (claim 13).

  According to the first ink mist collecting device of the present invention (Claim 1), when the ink roller group rotates in the cover surrounding the ink roller group of the inking device of the printing unit, the nip between the ink rollers is arranged. At the outlet, the ink kneaded by the roller causes stringing, which breaks and generates fine particulate ink mist. The air flow generator causes the air flow toward the discharge port along the inner wall surface of the cover. Therefore, the ink mist is carried to the discharge port by this air flow without being attached to the inner wall surface of the cover, and is discharged.

Therefore, ink mist is prevented from being deposited on the inner wall surface of the cover. Further, since the ink mist does not stay and is transported to the discharge port and discharged, the ink mist is prevented from being deposited on a portion other than the inner wall surface of the cover such as a frame in the cover. For this reason, cleaning of each part in a cover becomes unnecessary over a long period of time.
At the same time, the heat in the cover is also carried to the discharge port by the air flow and discharged, and the temperature rise in the cover is suppressed, so there is no need to form a gap in the cover for heat dissipation, and the ink Without causing the mist to leak to the outside, while suppressing the adverse effects on the other adjacent printing units and the surrounding environment due to the leakage of the ink mist, it is possible to prevent the ink temperature from rising excessively and ensure the print quality ( As described above, claim 1).

If the discharge port is provided in the downstream portion of the air flow generated by the rotation of the ink roller group in the space in the cover, the air flow generated by the air flow generator and directed toward the discharge port along the inner wall surface of the cover is generated. Since the ink mist is conveyed toward the discharge port in cooperation with the air flow generated by the rotation of the ink roller group, the ink mist can be efficiently recovered.
In addition, it is possible to have only one discharge port, which makes it possible to collect the ink mist without leaking to the outside while making it possible to easily perform exhaust processing with a simple configuration. (Claim 3).

  The cover is divided at a bent portion between the approaching point of the proximity roller and the discharge port, and an injection port that is provided in the air flow generator and injects an air flow toward the discharge port into the approaching point and the bent portion. If each is arranged, an air flow toward the discharge port is jetted along the inner wall surface of the cover even if the cover is bent, so that the ink mist does not adhere to the inner wall surface of the cover by this air flow. The ink mist adheres and accumulates on the inner wall surface of the cover with certainty (claim 4).

  When the cover has a main cover portion extending in one direction toward the discharge port, the main cover portion is divided into a plurality of cover portions, and each cover portion is shifted stepwise toward the discharge port and parallel to each other. If the injection port that arranges and injects the air flow toward the discharge port between each cover part is arranged, the air flow from the injection port at the part divided into each cover part of the main cover part, the main cover The air flow along the section can be generated in a substantially uniform flow without greatly decelerating toward the discharge port, and the ink mist is placed on this air flow and does not adhere to the inner wall surface of the cover. It is possible to reliably carry it to the outlet and discharge it (claim 5).

If a non-adhesive material that prevents adhesion of ink mist inside the cover is provided on the inner wall surface of the cover, adhesion of ink mist to the inner wall surface of the cover can be more reliably prevented.
Further, if an auxiliary air ejecting device that injects auxiliary air toward the direction away from the inner wall surface is provided on the inner wall surface of the cover, adhesion of ink mist to the inner wall surface of the cover can be more reliably prevented. (Claim 7).

In addition, if the cover is provided with an outlet and an outlet provided for the air flow generating device and ejects the air flow toward the outlet, the ink mist can be externally provided. It can collect | recover, without making it leak (Claim 8).
According to the second ink mist collecting device of the present invention (Claim 9), when the ink roller group rotates in the cover surrounding the ink roller group of the inking device of the printing unit, the nip between the ink rollers is detected. At the outlet, the ink kneaded by the roller causes stringing, and this gathers to generate fine particulate ink mist, but in the cover, from the position close to one of the rollers in the ink roller group, The ink mist is adhered and collected by a film that is movably disposed along the inner wall surface toward the discharge port.

  Therefore, the ink mist is transported to the discharge port without being attached to the inner wall surface of the cover and discharged, and the ink mist is prevented from being deposited on the inner wall surface of the cover. Further, since the stay of the ink mist is reduced by the amount recovered, the adhesion and deposition of the ink mist on a portion other than the inner wall surface of the cover such as a frame in the cover is also suppressed. For this reason, cleaning of each part in a cover becomes unnecessary over a long period of time.

In addition, since the film can move from the location between the proximity roller and the cover in the ink roller group toward the discharge port, the ink mist collected on the film can be recovered at the discharge port. Thus, the ink mist can be made difficult to leak to the outside, and adverse effects on other adjacent printing units and the surrounding environment are also suppressed.
In particular, if the discharge port is provided with a removal device that removes ink mist adhering to the film, the ink mist collected on the film can be removed. It is possible to return to the position (location close to one of the rollers in the cover) and reuse it.

  For example, the membrane is formed in an endless belt shape, and on the side of the space where the ink mist floats, the membrane is moved toward the discharge port, while on the inner wall surface of the cover opposite to the space where the ink mist floats. On the facing side, the film can be moved in the opposite direction, and the ink mist adhering to the film can be removed by the discharge port removing device, so that it can be reused.

  When the film is configured to adhere the ink mist by adhesive force, the removing device may wipe off the ink mist adhering to the film (claim 11), and the ink is charged by charging the film. In the case where the mist is electrically collected, the removing device is efficient if the ink mist adhering to the film is wiped off while removing the charge of the film (claim 12).

  In addition, an exhaust device that promotes exhaust is provided at the discharge port, and the cover is provided with a discharge port installation location where the downstream end of the membrane is disposed and a location between the proximity roller where the upstream end of the membrane is disposed and the cover If the opening is not provided in addition to the above, the exhaust device promotes the exhaust from the exhaust port, so that the heat in the cover is carried to the exhaust port by the exhaust flow and exhausted, and the temperature in the cover rises. Therefore, it is not necessary to form a gap in the cover for heat dissipation, and it is possible to suppress the external leakage of the ink mist and to suppress the adverse effect on the other adjacent printing units and the surrounding environment due to the leakage of the ink mist. However, an excessive increase in the ink temperature can be suppressed to ensure the print quality (claim 13).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
1 to 4 show a printing unit and an ink mist collecting apparatus according to a first embodiment of the present invention. FIG. 1 is a configuration diagram thereof, and FIG. 2 is a diagram for explaining an air flow generated by an ink roller of the printing unit. FIG. 3 is a perspective view showing a main part of an auxiliary air ejecting device of the ink mist collecting device, and FIG. 4 is a front view showing a filter at the discharge port of the ink mist collecting device.

FIG. 1 schematically shows a side view of the printing unit, and such a configuration is continuous in the printing width direction. Further, although not shown in the drawings, frames that cover the side portions of the printing unit are provided at both ends in the printing width direction of the printing unit.
First, the printing unit according to the present embodiment will be described. As shown in FIG. 1, this printing unit 2 is provided in a single-sided printing type offset rotary printing press, and includes an inking device 3 and a plate cylinder in which ink is supplied from the inking device 3 to a printing plate provided on the outer periphery. 5, a blanket cylinder 6 to which ink is transferred from the plate cylinder 5 according to the pattern of the printing plate, and a pressure cylinder 8 pressed against the blanket cylinder 6 via the printing paper (web) 1. Ink is transferred to one surface (here, the upper surface) of the printing paper 1.

  The inking device 3 is provided with an ink fountain 3A, which is formed by being surrounded by an ink key and a side plate (not shown) and an ink source roller 3a at the most upstream, and stores a gap (ink key opening) between the ink key and the ink source roller 3a. Ink is supplied to the surface of the ink base roller 3a with an ink supply amount (ink thickness) according to the degree. The ink source roller 3a supplies ink to a large number of ink rollers 4a to 4n via the calling roller 3b.

  In the inking device 3, ink is supplied to the most downstream ink rollers 4j, 4k, 4n while kneading ink by a large number of ink rollers 4a-4n, and the plate cylinders are supplied from these ink rollers 4j, 4k, 4n. Ink is supplied to the outer peripheral printing plate. At this time, a part of the ink rollers 4a to 4n kneads ink while reciprocating in the axial direction (printing width direction).

  Further, a dampening device 7 is attached to the downstream portion of the ink rollers 4a to 4n. In the dampening device 7, the dampening water in the water boat 7A is supplied to the water source roller 7a, the metering roller 7b, and the swimsuit. It is supplied to the printing plate on the outer periphery of the plate cylinder 5 through the roller 7c. Further, the water application roller 7c is also in contact with the ink roller 4m that is in contact with the ink application roller 4n, and the emulsified ink is supplied to the ink application roller 4n.

Here, the ink roller 4a to 4n plus the ink source roller 3a and the calling roller 3b are referred to as an ink roller group 4.
The ink roller group 4 of the inking device 3 is covered with a cover (so-called safety cover) 10 so that an operator does not accidentally contact the ink roller or the like.
The ink mist collecting apparatus according to the present embodiment is based on the cover 10 surrounding the ink roller group 4 of the inking apparatus 3 as described above, and the discharge ports 30A and 30B provided by opening a part of the cover 10 are provided. And an airflow generator 20 that generates an airflow toward the outlets 30A and 30B along the inner wall surface of the cover 10 is provided as an essential component.

The cover 10 is composed of main cover parts 12, 13, 14, 16 and sub-cover parts 11, 15, 17 and the above-mentioned frame (not shown).
The first main cover part 12 and the third main cover part 16 are arranged in the vertical direction, and the second main cover part 13 and the fourth main cover part 14 are arranged in the horizontal direction. .
Among these, the front-end | tip part (upper end part in the figure) of the 1st main cover part 12 and the front-end | tip part (right end part in the figure) of the 2nd main cover part 13 have gathered, and in this part, A first discharge port 30A is provided. A second discharge port 30 </ b> B is provided at the distal end portion (upper end portion in the drawing) of the third main cover portion 16.

  The base end portion (lower end portion in the drawing) of the first main cover portion 12 is separated from the ink roller group 4, but the first main cover portion is separated from the base end portion of the first main cover portion 12. Bent from the first main cover portion 12 toward the ink roller 4k as a proximity roller, which is located near the base end portion 12 and located at the most corner (lower right corner in the drawing) in the ink roller group 4 Thus, the first sub-cover portion 11 is disposed obliquely downward, and the gap between the cover 10 and the ink roller group 4 is slight.

  Similarly, the base end portion (left end portion in the figure) of the second main cover portion 13 is also separated from the ink roller group 4, but the second end portion of the second main cover portion 13 is separated from the second end portion of the second main cover portion 13. Toward an ink roller (ink source roller) 3a as a proximity roller located near the base end portion of the main cover portion 13 and at the most corner (upper left corner in the drawing) of the ink roller group 4, A second sub-cover portion 15 is disposed obliquely downward so as to be bent from the second main cover portion 13, and the gap between the cover 10 and the ink roller group 4 is slight.

Similarly, the proximal end portion (lower end portion in the drawing) of the third main cover portion 16 is also separated from the ink roller group 4, but the third end portion of the third main cover portion 16 is separated from the third end portion of the third main cover portion 16. Toward an ink roller (metering roller) 7b as a proximity roller located near the base end of the main cover portion 16 and at the most corner (lower left corner in the figure) in the ink roller group 4, A third sub-cover portion 17 is disposed obliquely downward so as to be bent from the three main cover portions 16, and the gap between the cover 10 and the ink roller group 4 is slight.
The cover 10 is not provided with openings other than the installation locations of the discharge ports 30 </ b> A and 30 </ b> B and the injection ports 21 to 26 of the airflow generator 20.

In addition, the inner wall surface of the cover 10 is coated with a fluorine resin or a silicon resin as a non-adhesive material in order to prevent adhesion of ink mist inside the cover 10.
The gap between the first sub cover portion 11 and the ink roller 4k, the bent portion where the first sub cover portion 11 and the first main cover portion 12 are adjacent, the second sub cover portion 15 and the ink roller ( A gap between the ink main roller) 3a, a bent portion where the second main cover portion 13 and the second sub cover portion 15 are adjacent, and a gap between the third sub cover portion 17 and the ink roller (metering roller) 7b. The bent portions where the third main cover portion 16 and the third sub cover portion 17 are adjacent to each other are provided with injection ports (air flow injection ports) 21 to 26 of the air flow generation device 20, respectively. .

The airflow generator 20 injects an airflow from each of the injection ports 21 to 26, and as shown by arrows A1 to A6 in FIG. An air flow toward the outlets 30A and 30B is generated along the inner wall surfaces of 13, 14, 16, and 17.
Each of the airflows A1 to A6 directed to the respective discharge ports 30A and 30B follows the airflow (see the white arrow in FIG. 1) inside the cover 10 generated by the rotation of each ink roller of the ink roller group 4. In addition, the positions of the discharge ports 30A and 30B are set.

That is, as shown in FIG. 2, in the ink roller group 4, the left rotating ink roller 4L and the right rotating ink roller 4R1, 4R2 are in contact with each other by forming a nip, and each of the ink rollers 4R1, 4L, Around the outer periphery of the 4R2, air flows AF to 1AF3 are formed along the rotation direction of the ink rollers 4R1, 4L, and 4R2.
Among the air flows AF1 to AF3 around the outer periphery of the ink roller, on the side where the air flows AF1 and AF2 move away from each other at the nip portion of the ink rollers 4R1 and 4L (upward in FIG. 2), the air flow AF4 toward the nip portion is On the side where the air flows AF2 and AF3 approach each other at the nip portion of the ink rollers 4L and 4R2 (upward in FIG. 2), an air flow AF5 is formed in the direction in which the nip portion is separated.

Therefore, an air flow as shown by the white arrow in FIG. 1 is formed inside the cover 10, and the ink roller is moved in the same direction as the air flows A 1 to A 6 along the inner wall surface of the cover 10. An air flow is formed by rotation.
Since the airflows A1 to A6 formed by the airflow generation device 20 are thus along the airflow caused by the rotation of the ink roller, the inside of the cover 10 extremely smoothly enters the discharge ports 30A and 30B. A flowing air flow will be formed.

  The jets 21 to 26 of the air flow generator 20 preferably generate the air flows A1 to A6 almost uniformly in the print width direction. For example, as shown in FIG. The opening member 20a that opens in the generation direction is divided into a plurality of opening portions to form the injection ports 21 to 26, and an air compressor (or an air fan) is formed in the opening member 20a [for example, from below in FIG. ) Compressed air from 20A to 20C (see FIG. 1) is supplied through the supply pipes 27a to 27f, and the air flows A1 to A1 by jetting air from the respective opening portions (injection ports) 21 to 26. A6 can be formed.

  Or as shown in FIG.3 (b), the opening member 20b may be made independent in each opening part, and may supply the compressed air from air compressor 20A-20C (refer FIG. 1) to each opening part 20b. . Most simply, as shown in FIG. 3 (c), holes arranged at equal intervals in the direction of generation of the air flows A1 to A6 are formed on one side of the air supply pipe 20c extending in the printing width direction. Even if the compressed air from the air compressors 20A to 20C (see FIG. 1) is fed into the air supply pipe 20c, the air flows A1 to A6 can be formed.

  Further, the exhaust ports 30A and 30B are equipped with a filter 31 as shown in FIG. 4 so that the ink mist components in the exhaust gas riding on the airflows A1 to A6 are collected by the filter 31. In addition, it is preferable to provide the filter 31 in the direction orthogonal to each airflow A2, A3, A5 so that each airflow A2, A3, A5 may be opposed. Thus, since the ink mist component can be collected by the filter 31 by installing the filter 31, as a normal maintenance, the filter 31 is washed or replaced when the ink mist component is adsorbed to some extent by the filter 31. Just be good.

The exhaust ports 30A and 30B are equipped with ducts (not shown) for exhausting the exhaust air sucked by the airflows A1 to A6. The ducts and the like are provided with the cover 10 on the back of the exhaust ports 30A and 30B. You may connect to discharge port 30A, 30B so that it may penetrate, or you may connect to the one end or both ends of discharge port 30A, 30B extended in a printing width direction.
Further, as shown by a two-dot chain line in FIG. 1, if the exhaust ducts 28a to 28c are connected to the intake sides of the corresponding air compressors 20A to 20C, the air compressors 20A to 20C discharge the outlets 30A and 30B. It is possible to generate an air flow for sucking exhaust gas, and the air flows A1 to A6 in the cover 10 and the exhaust flows in the exhaust ducts 28a to 28c can be configured as circulation flows through the air compressors 20A to 20C. Is.

  Since the ink mist collection device according to the first embodiment of the present invention is configured as described above, when the ink roller group 4 of the inking device 3 rotates in the cover 10, the nip outlets between the ink rollers. The ink kneaded by the roller causes stringing, which is cut to generate fine particle ink mist. The air flow generator 20 discharges the ink outlets 30A and 30B along the inner wall surface of the cover 10. Therefore, the ink mist is carried to the discharge ports 30A and 30B by the air flows A1 to A6 without being attached to the inner wall surface of the cover 10 and discharged. Note that the ink mist component in the exhaust is recovered by the filter 31 at the discharge ports 30A and 30B.

  Therefore, the ink mist is prevented from adhering and depositing on the inner wall surface of the cover 10. Further, since the ink mist does not stay and is transported to the discharge ports 30A and 30B and discharged, the ink mist is prevented from being deposited on the cover 10 other than the inner wall surface of the cover 10 such as a frame (not shown). The For this reason, as normal maintenance, it is only necessary to periodically clean or replace the filter 31, and cleaning of each part in the cover 10 becomes unnecessary for a long time.

  At the same time, the heat in the cover 10 is also carried to the discharge ports 30A and 30B by the airflows A1 to A6 and discharged, and the temperature rise in the cover 10 is suppressed. Thereby, it is not necessary to form a gap in the cover 10 for heat dissipation, and the cover 10 has the discharge ports 30A and 30B and the airflow generator 20 so that the ink mist is not leaked to the outside. Except for the installation locations of the jet nozzles 21 to 26, no openings are provided so that adverse effects on the adjacent printing unit and the surrounding environment due to leakage of ink mist can be suppressed. The print quality can be ensured by suppressing the increase.

Further, the air flow A1 to A4 along the covers 11 to 13 covering the ink rollers 4a to 4k, in which the ink mist is most likely to adhere and accumulate in the cover 10, is gathered at a single outlet 30A. Since only one exhaust port 30A is provided in the area, the configuration of the exhaust system such as an exhaust duct can be simplified. Basically, it is only necessary to clean or replace each filter 31 of the exhaust port 30A. Also, the maintenance is advantageous.
Here, each exhaust region is provided with only one exhaust port. Of course, a plurality of exhaust ports can be provided in each exhaust region.

  Further, since the discharge ports 30A and 30B are located in the most downstream portion where the air flow generated by the rotation of the ink roller group 4 is directed, the discharge ports 30A are generated along the inner wall surface of the cover 10 generated by the air flow generator 20. , 30B, in cooperation with the air flow generated by the rotation of the ink roller group 4, the ink mist is transported toward the discharge ports 30A, 30B, so that the ink mist can be efficiently recovered. .

  Further, if the cover 10 is composed only of the main cover parts 12 and 16 oriented in the vertical direction and the main cover parts 13 and 14 oriented in the horizontal direction, the cover 10 and the ink rollers 4k, 3a, Although a large gap is opened between the main cover portions 12, 13, and 16 at one end, the bent portions are bent from the main cover portions 12, 13, and 16, although a large gap is opened between the main cover portions 12 and 13, and 16b. Therefore, the gaps between the ink rollers 4k, 3a, and 7b are reduced.

Moreover, since the injection ports 22, 24, and 26 are disposed also in the bent portion, even if the cover 10 is bent, the airflows A 2 and A 3 directed toward the discharge ports 30 A and 30 B along the inner wall surface of the cover 10 are generated. Therefore, the air flow ejected from the ejection ports 21, 23, 25 arranged at the location close to the upstream ink rollers 4 k, 3 a, 7 b is the air flow from the ejection ports 22, 24, 26. The ink mist is transferred to the discharge ports 30A and 30B while restoring the flow velocity attenuated by the above and changing the direction along the bent main cover portions 12, 13, and 16. For this reason, even if a bending part fits, adhesion deposition of ink mist to the inner wall surface of the cover 10 is suppressed reliably.
Further, since the inner wall surface of the cover 10 is coated with a fluorine resin or a silicon resin as a non-adhesive material, the ink mist is prevented from sticking to the inside of the cover 10 from this point.

[Second Embodiment]
5 and 6 show a printing unit and an ink mist collecting apparatus according to a second embodiment of the present invention. FIG. 5 is a configuration diagram thereof, and FIG. 6 is a perspective view showing a characteristic portion of the ink mist collecting apparatus. is there.

The printing unit 2 according to the present embodiment is the same as that of the first embodiment. In FIG. 5, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In addition, in FIG. 5, description is abbreviate | omitted about air compressor (or air fan) 20A-20C and supply pipe | tube 27a-27f.
In this embodiment, as shown in FIGS. 5 and 6, a plurality of relatively long main cover portions 12 extending in the vertical direction toward the discharge port 30 </ b> A among the components of the cover 10 of the first embodiment (here, Then, the cover portions 12a, 12b, and 12c are divided into three, and the cover portions 12a, 12b, and 12c are shifted stepwise so as to be gradually separated from the ink roller group 4 toward the discharge port 30A and parallel to each other. Is arranged. In addition, in the same manner as in the first embodiment, the injection port 22a for injecting the air flow A21 toward the discharge port 30A is arranged between the upstream cover portion 12a and the sub cover portion 11 at the upstream end. 12a, 12b, 12c, that is, between the cover portions 12a, 12b and between the cover portions 12b, 12c, respectively, the injection port 22b and the discharge port 30A that inject the air flow A22 toward the discharge port 30A, respectively. The injection port 22c which injects the airflow A23 which goes to is arrange | positioned.

  In the ink mist collecting apparatus of the present embodiment, the relatively long main cover portion 12 is divided into cover portions 12a, 12b, and 12c that are shifted stepwise and parallel to each other, and each cover portion 12a, 12b, and 12c is divided. Since the injection ports 22b and 22c for injecting the airflows A22 and A23 toward the discharge port 30A are provided in the same manner as the injection port 22a at the upstream end of the most upstream cover portion 12a, the main cover portion 12 is provided. The air flow A2 along the line A2 is attenuated at the downstream of the cover portion 12a even if the air flow A21 injected from the injection port 22a is attenuated, and the strength of the air flow is restored because the air flow A22 injected from the injection port 22b is added. Furthermore, even if the air flow A22 injected from the injection port 22b is attenuated downstream of the cover portion 12b, the air flow A23 injected from the injection port 22c is added, so that the strength of the air flow is increased. To recovery.

  In this way, even if the main cover portion 12 is relatively long, the cover portion is configured in a step shape and the injection ports 22b and 22c are also provided in the step portion, so that the discharge port 30A is not attenuated. Since the air flow A2 can be generated, the ink mist is reliably transported toward the discharge port 30A without being retained, so that the ink mist can be collected more efficiently. Ink mist adhesion and accumulation can be further suppressed.

  In the present embodiment, the main cover portion 12 is divided into cover portions 12a, 12b, and 12c that are shifted stepwise and parallel to each other, and the injection ports 22b and 22c are disposed between the cover portions 12a, 12b, and 12c. However, for example, the main cover portions 13 and 16 may have the same configuration. For example, the relatively long main cover portion 13 is divided into three parts, and the relatively short main cover part 16 is divided into two parts. For example, the number of divisions may be set as necessary.

Further, such a configuration may be applied to the sub cover portions 11, 14, and 17.
In the first and second embodiments, the inner wall surface of the cover 10 is coated with a fluorine resin or a silicon resin as a non-adhesive material, but in addition to or instead of this, FIG. As shown in (b), an auxiliary air injection device that injects compressed air as auxiliary air from the inner wall surface of the cover 10 (each cover portion 11 to 17) toward the inside of the cover (a direction away from the inner wall surface). You may equip it.

  That is, the fine air injection hole 18 is provided in the inner wall surface of the cover 10 (each cover part 11-17), and as shown in FIG. As shown in (b), the air flows A1 to A6 are slightly separated from the inner wall surface of the cover 10 by ejecting the compressed air in the inclined direction along the air flows A1 to A6 while being separated from the inner wall surface. It is possible to prevent the ink mist transferred together with the air flows A1 to A6 from directly touching the inner wall surface of the cover 10 so as to flow through the position, and to further adhere the ink mist to the inner wall surface of the cover 10, Or it can suppress, without using a non-adhesive material.

Also in this case, the air injection holes 18 are provided only in necessary portions of the cover portions 11 to 17 so that the auxiliary air is injected so that the airflows A1 to A6 flow at positions slightly separated from the inner wall surface of the cover 10. You can do it.
In addition, the compressed air which goes to the direction away from the inner wall surface of the cover from the air injection hole 18 naturally acts on the vicinity of the inner wall surface of the cover so as not to obstruct the flow of the air flows A1 to A6. It becomes necessary to be.

[Third Embodiment]
FIG. 8 is a block diagram showing a printing unit and an ink mist collecting apparatus according to the third embodiment of the present invention.
The printing unit 2 according to the present embodiment is the same as that of the first embodiment. In FIG. 8, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the present embodiment, as shown in FIG. 8, the ink mist adhering to the belts 41a, 42a, 43a as films disposed so as to be movable toward the discharge ports 30C, 30D along the inner wall surface of the cover 10 is provided. Collection devices 41, 42, 43 are provided.

  Each of the ink mist adhesion collection devices 41, 42, and 43 is a guide roller or drive roller 41b to 41e so as to move along the path bent along the main cover portions 12, 13, and 16 from the sub cover portions 11, 15, and 17. , 42b to 42e and 43b to 43e guide the belts 41a, 42a and 43a, and drive the inner surfaces of the belts 41a, 42a and 43a to move toward the discharge ports 30C and 30D.

  Here, the belts 41a, 42a, 43a are configured endlessly, and rotate so as to return along the inner wall surface of the cover 10 when the belts 41a, 42a, 43a are advanced to the discharge ports 30C, 30D. When each belt 41a, 42a, 43a adheres and collects ink mist on its surface, the ink mist adhering to the surface is removed by removing devices 44 to 46 provided in the portions of the discharge ports 30C, 30D. ing.

Further, the material of each belt 41a, 42a, 43a has a certain durability such as a film of polypropylene or the like and can adhere the ink mist, and the attached ink mist can be easily wiped off. Apply material.
The removing devices 44 to 46 are rollers around which a cleaning cloth or cleaning paper is wound, and the outer peripheral cleaning cloth or cleaning paper is replaced by wiping off and removing the ink mist.

The base end portions of the belts 41a, 42a, 43a guided by the guide rollers or drive rollers 41b, 42b, 43b are the sub cover portions 11, 15, 17 of the cover 10 and the ink rollers 4k, 3a adjacent thereto. , 7b are arranged close to the ink rollers 4k, 3a, 7b so as to narrow the gap between them.
Similarly to the first and second embodiments, the discharge ports 30C and 30D are arranged so as to be located at the most downstream portion of the air flow along the inner wall surface of the cover 10 formed by the air flow generated by the rotation of the ink roller. The air flow that has advanced to the discharge ports 30C and 30D along the inner wall surface of the cover 10 is exhausted by an exhaust suction device (exhaust device that promotes exhaust) (not shown).

  With this configuration, the ink mist collecting apparatus according to the present embodiment, when the ink roller group 4 rotates in the cover 10, the ink kneaded by the rollers generates stringing at the nip exit between the ink rollers. As a result, fine particulate ink mist is generated, and the discharge port 30C, along the inner wall surface of the cover 10 from a position close to any of the rollers 4k, 3a, 7b in the ink roller group. Ink mist is attached and collected by belts 41a, 42a, 43a movably arranged toward 30D.

  Therefore, the ink mist is transported and discharged to the discharge ports 30C and 30D without adhering to the inner wall surface of the cover 10, and the ink mist is suppressed from adhering and depositing on the inner wall surface of the cover 10. Further, since the stay of the ink mist is reduced by the amount recovered, adhesion and deposition of the ink mist on a portion other than the inner wall surface of the cover 10 such as a frame in the cover 10 is also suppressed. For this reason, cleaning of each part in the cover 10 becomes unnecessary over a long period of time.

  Further, since the belts 41a, 42a, and 43a move toward the discharge port from a portion between the proximity roller and the cover in the ink roller group, the ink collected by the belts 41a, 42a, and 43a. The mist can be collected and removed by the removal devices 44 to 46 of the discharge ports 30C and 30D, the ink mist can be made difficult to leak to the outside, and there is an adverse effect on other adjacent printing units and the surrounding environment. It is suppressed.

  In particular, in the present embodiment, the belts 41a, 42a, 43a are formed endlessly, and on the space side where the ink mist floats, the belts 41a, 42a, 43a are moved toward the discharge ports 30C, 30D, while the ink On the side facing the inner wall surface of the cover 10 on the side opposite to the space where the mist floats, the belts 41a, 42a, 43a are moved in the reverse direction, and the removal devices 44-46 for the discharge ports 30C, 30D in the middle. Since the ink mist collected on the belts 41a, 42a and 43a is collected and removed, and the belts 41a, 42a and 43a are reused without making them consumables, the removal devices 44 to 46 are replaced for maintenance. Etc., and maintenance can be easily performed.

  Further, the exhaust ports 30C and 30D exhaust the air flow that has advanced to the exhaust ports 30C and 30D along the inner wall surface of the cover 10 by an exhaust suction device (exhaust device that promotes exhaust) (not shown). Since the heat in the cover 10 is carried to the discharge ports 30C and 30D by the exhaust flow and discharged, and the temperature rise in the cover 10 is suppressed, it is necessary to form a gap in the cover 10 for heat dissipation. In addition, by suppressing the external leakage of the ink mist and suppressing the adverse effects on the other adjacent printing units and the surrounding environment due to the leakage of the ink mist, it is possible to suppress the excessive increase in the ink temperature and ensure the printing quality. it can.

Since the guide rollers 41e, 42e, 43e for guiding the belts 41a, 42a, 43a are exposed in the space where the ink mist floats, they are made of a non-adhesive material such as a fluorine resin or a silicone resin which is difficult to adhere the ink mist. It is preferred to coat the outer surface.
Further, in the present embodiment, the belts 41a, 42a, 43a are endless. However, these are not endless, and a roll-shaped resin film is provided at a position where each upstream end guide roller or drive roller 41b, 42b, 43b is located. Alternatively, paper is installed and fed in the direction of the discharge ports 30C and 30D, and a take-up roll is installed near the location where the guide rollers or drive rollers 41d, 42d and 43d are located near the discharge ports 30C and 30D. The resin film or paper after adsorbing the ink mist may be used as a consumable material so as to be replaced after the whole is wound up and collected.

  In addition, the film (belt or resin film or paper) is configured to adhere the ink mist by adhesive force, and the ink mist may be configured to electrically collect the ink mist by charging the film. In this case, the removing device is efficient if the ink mist adhering to the film is wiped and removed while the film is neutralized.

[Others]
As mentioned above, although embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment, It can implement in various changes in the range which does not deviate from the meaning of this invention.
For example, the mechanism of the third embodiment may be applied to the first embodiment or the second embodiment, and the configuration of FIG. 7 may be applied as appropriate.
In the first to third embodiments, since the ink mist is relatively less contaminated in the upper part of the dampening device 7, the ejection ports 25 and 26 of the airflow generator 20 provided at this position or the ink mist The adhesion collection device 43 can be omitted.

It is a block diagram which shows the printing unit and ink mist collection | recovery apparatus concerning 1st Embodiment of this invention. It is a schematic diagram explaining the airflow produced by the ink roller of the printing unit concerning 1st Embodiment of this invention. It is a perspective view which shows the principal part of the auxiliary air injection apparatus of the ink mist collection | recovery apparatus concerning 1st Embodiment of this invention, (a) is the 1st example, (b) is the 2nd example, (c ) Respectively show the second examples. It is a front view which shows the filter of the discharge port of the ink mist collection | recovery apparatus concerning 1st Embodiment of this invention. It is a block diagram which shows the printing unit and ink mist collection | recovery apparatus concerning 2nd Embodiment of this invention. It is a perspective view which shows the characterizing part of the ink mist collection | recovery apparatus concerning 2nd Embodiment of this invention. It is a schematic diagram explaining the modification of the printing unit concerning 1st, 2nd embodiment of this invention. It is a block diagram which shows the printing unit and ink mist collection | recovery apparatus concerning 3rd Embodiment of this invention.

Explanation of symbols

1 Printing paper (web)
2 Printing unit 3 Inking device 3a Ink base roller 3A Ink fountain 3b Invocation roller 4 Ink roller group 4a-4n Ink roller 5 Plate cylinder 6 Blanket cylinder 7 Dampening device 7A Water boat 7a Water source roller 7b Metering roller 7c Roller 8 Impression cylinder 10 Cover (safety cover)
12, 13, 14, 16 Main cover portion 12a, 12b, 12c Cover portion 11, 15, 17 Sub cover portion 20 Air flow generator 20A to 20C Air compressor (or air fan)
21-26, 22a, 22b, 22c Outlet 27a-27f of airflow generator 20 Feed pipe 28a-28c Exhaust duct 30A, 30B Discharge port 31 Filter 41, 42, 43 Ink mist adhesion collection device 41a, 42a, 43a Belts as membranes 41b-41e, 42b-42e, 43b-43e Guide rollers or drive rollers 44-46 Removal devices A1-A6 Air flow

Claims (13)

A cover surrounding the ink roller group of the inking device of the printing unit;
A discharge port provided by opening a part of the cover;
An air flow generating device that generates an air flow toward a discharge port along an inner wall surface of the cover from a location between the cover and a proximity roller adjacent to the cover in the ink roller group; An ink mist collection device characterized by having it. 2. The ink mist collecting apparatus according to claim 1, wherein the discharge port is provided in a downstream portion where an air flow generated by rotation of the ink roller group reaches in a space in the cover. The ink mist collecting apparatus according to claim 2, wherein only one outlet is provided in the downstream portion. The cover is divided at a bent portion between the approaching point with the proximity roller and the discharge port,
4. The air flow generator according to claim 1, wherein the air flow generator has an injection port that is arranged at each of the approaching portion and the bent portion and injects an air flow toward the discharge port. 5. The ink mist collection device according to claim 1. The cover includes a main cover portion extending in one direction toward the discharge port, and the main cover portion is divided into a plurality of cover portions, and each cover portion is shifted stepwise toward the discharge port. And arranged parallel to each other,
5. The air flow generator according to claim 1, wherein the air flow generator has an injection port that is disposed between the cover portions and injects an air flow toward the discharge port. 6. The ink mist collection device described in 1. The ink mist collection device according to any one of claims 1 to 5, wherein a non-adhesive material for preventing adhesion of ink mist inside the cover is provided on an inner wall surface of the cover. The ink mist according to any one of claims 1 to 6, wherein an auxiliary air ejecting device that ejects auxiliary air toward the direction away from the inner wall surface is provided on the inner wall surface of the cover. Recovery device. The cover is provided with the discharge port and the air flow generation device, and has no opening other than each installation location of an injection port that injects an air flow toward the discharge port. The ink mist collection | recovery apparatus of any one of 1-7. A cover surrounding the ink roller group of the inking device of the printing unit;
A discharge opening provided in a part of the cover;
A film disposed so as to be movable toward the discharge port along the inner wall surface of the cover from a position near at least one of the rollers of the ink roller group in the cover;
An ink mist collecting apparatus for collecting ink mist inside the cover by attaching it to the film. The ink mist collection device according to claim 9, wherein a removal device for removing the ink mist adhering to the film is provided at the discharge port. The film is configured such that the ink mist adheres by adhesive force,
The ink mist collecting apparatus according to claim 10, wherein the removing device wipes and removes the ink mist adhering to the film. The membrane is configured to electrically collect the ink mist by being charged,
11. The ink mist collecting apparatus according to claim 10, wherein the removing device wipes and removes the ink mist adhering to the film while discharging the film. The exhaust port is provided with an exhaust device for promoting exhaust,
The cover does not have an opening other than the installation location of the discharge port where the downstream end of the membrane is arranged and the location between the proximity roller where the upstream end of the membrane is arranged and the cover. The ink mist collection device according to any one of claims 9 to 12, wherein

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