JP5706997B1 - Ink jet print head ejection failure prevention apparatus and method - Google Patents

Abstract

Disclosed is an ejection failure prevention apparatus and method for an inkjet print head that can be installed in various inkjet printers without requiring a large-scale apparatus. The inkjet printing head includes an ejection nozzle for ejecting ink for printing continuous paper and is continuously running while being run. The ink jet print head ejection failure prevention device 1 is fixedly disposed at a predetermined position in the ink jet printer with respect to the paper, and is disposed at least on either the inlet side or the outlet side in the continuous paper running direction of the ink jet print head to absorb the ink mist. The first ink mist adsorbing unit 100 that is disposed in the continuous paper running direction entrance side and the exit side of the ink jet print head is disposed in a lower area than the continuous paper in the print area, and adsorbs ink mist. 2 ink mist adsorbing portions 200. [Selection] Figure 8

Description

  The present invention relates to an ejection failure prevention apparatus and method for an inkjet print head used in an inkjet printer that performs printing by droplet ejection.

  After unrolling the continuous paper wound in a roll shape, this is run in one direction (predetermined direction), and at a predetermined position of the running continuous paper, the print head of the ink jet printer (hereinafter referred to as “ink jet print head”). Ink jet printers called so-called digital printers are known that discharge liquid ink using a printer and print on a recording medium such as paper or film (see, for example, Patent Document 1).

  Such inkjet printers have features such as small-lot production, miniaturization, low cost, and low cost, and from the viewpoint of high-speed printing and high resolution, many printers used for printing newspapers and flyers and tabloid printing in recent years. And are used in printing presses. As an overall configuration necessary for a series of printing processes including the inkjet printing machine, an inkjet printing machine, a paper feeding device arranged in the upstream process, a folding device arranged in the downstream process, a section device, and a chopper device are provided. Can be mentioned.

  Such an ink jet printer can transmit and receive the content to be printed by digital communication technology. As a result, even when one inkjet printer is installed overseas or on a remote island, for example, the latest information can be printed in a timely manner in accordance with the printing and distribution of daily newspapers in Japan. Even in remote areas, it is possible to distribute daily newspapers equivalent to daily newspapers that are printed and distributed domestically without incurring special transport costs and without causing a delay in the distribution date and time. Also, by using a single inkjet printer, it is possible to print multiple types of daily papers in a single day. Is possible.

  In addition, as described above, it is possible to print a flyer for advertisement distributed to the region by efficiently using the idle time for printing with various types of daily papers mixed. Thus, unlike conventional newspaper rotary presses, inkjet printers are suitable for high-mix low-volume production.

  Further, the configuration of the ink jet printer itself has various advantages because the scale of the apparatus is smaller than that of a conventional offset rotary press. Specifically, since it has much lower power consumption than an offset rotary press, it is possible to save energy in a printing factory. In addition, various components necessary for an offset rotary press are not required, and the lightweight and compact design allows installation in a printing factory in a space-saving manner, thereby reducing foundation work and air conditioning equipment costs. In addition, since noise is low, no noise countermeasures are required on the building side, and there is no need to ask the installation environment. In addition, various materials such as plate materials and fountain solution are not required, thus saving resources.

JP 2006-082286 A

  In the vicinity of the printing portion of the ink jet printer having various merits as described above, a plurality of ink jet print heads are fixedly arranged side by side for each color. Then, ink is landed on a recording medium such as paper or film by discharging ink droplets from an ink jet print head, and digital printing of various patterns is performed.

  In performing the above-described printing, so-called ink mist is generated when ink droplets are ejected from the ink jet print head. Such ink mist is generated by adhering to the nozzle surface of the ink jet print head, causing temporary non-ejection or ejection failure, occurrence of permanent non-ejection due to adhesion due to adhesion of different types of ink, substrates, servers, etc. The peripheral electronic equipment and electrical equipment of the printer will fail, which greatly hinders the printing operation.

  However, even if the above-mentioned patent document and the conventional technique described in this patent document are used, the problems relating to so-called ink mist are not solved, and the occurrence of such ink mist causes a droplet ejection failure of the inkjet print head, the substrate. As a result, there is a problem that peripheral electronic devices such as servers and servers are broken down, resulting in a significant increase in cost due to replacement of the ink jet print head and these peripheral electronic devices. In particular, when an ink jet printer is installed overseas or on a remote island as described above, if such a failure occurs, it cannot be dealt with immediately, and seriously affects the distribution of daily newspapers at the site.

  Especially in recent years, high speed, high quality, high resolution, etc. are required for digital printing, so the number of ink jet print heads used is increasing, and the amount of so-called ink mist generated is increasing. In order to cope with higher speeds, increasing the running speed of continuous paper as a recording medium causes the running continuous paper to generate further running wind around it, and ink mist is scattered in many directions. Thus, it is a problem to further promote the above-described problems.

  In addition, so-called paper dust generated when unwinding continuous paper to be printed from continuous paper wound in a roll or when the continuous paper after unwinding is run at a high speed is generated in an area where ink is ejected from an inkjet print head. There is a problem that the ink that has entered and slurried with the ink mist is solidified to cause clogging of the nozzles of the ink jet print head.

  In addition, cleaning work to remove stains in the printing press due to scattered ink mist and paper dust adhering to the ink jet printing press, contamination on the continuous paper as a recording medium, and resulting deterioration in product quality as a printed matter Has also occurred.

  Note that even if you try to forcibly suck ink mist or paper dust that is scattered and floating in the space around the printing area near the inkjet print head with a suction mechanism, the effect is thin and the structure is complicated and inside the printing press. Despite the difficulty in further arrangement of the suction mechanism and the provision of a dedicated suction mechanism, the inkjet printing machine is equipped with such a suction mechanism due to increased costs, problems with processing of ink mist and paper dust after suction, etc. This causes various other problems and cannot be a realistic countermeasure.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an inkjet printhead ejection failure prevention apparatus and method that can be easily and quickly installed in any inkjet printer without requiring a large-scale apparatus at a low cost.

In order to solve the above-described problems, an inkjet printhead ejection failure prevention device according to claim 1 of the present invention provides:
A discharge failure prevention device for an inkjet print head provided in an inkjet printer that prints on a continuous paper that rolls in a roll and is continuous and travels in a predetermined direction after being unwound,
The ink jet print head has a discharge nozzle that discharges ink of a specific color for printing the continuous paper in either a single color or a color, and is at a predetermined position in the ink jet printer with respect to the continuous paper that is running. It is supposed to be fixedly arranged,
The ejection failure prevention device for the inkjet print head is disposed on at least one of the inlet side and the outlet side in the continuous paper running direction of the inkjet print head in a state where the inkjet printer is installed, and scatters from the inkjet print head. A first ink mist adsorbing portion that adsorbs ink mist, and a continuous area in the continuous paper running direction of the inkjet print head, arranged in a lower area than the continuous paper in the print area formed between the outlet side and the outlet side; It has the 2nd ink mist adsorption part which adsorbs the ink mist.

An inkjet print head ejection failure prevention apparatus according to claim 2 of the present invention is the inkjet print head ejection failure prevention apparatus according to claim 1,
The inkjet printer is a printer that corresponds to the monochrome printing or color printing, preventing a plurality of the ink jet print head, paper dust scattered from the continuous sheet in said traveling from entering the printing area The paper dust intrusion prevention unit is provided at least on the inlet side in the continuous paper running direction of the inkjet print head located at the most upstream in the continuous paper running direction among the plurality of inkjet print heads.

An inkjet print head ejection failure prevention apparatus according to claim 3 of the present invention is the inkjet print head ejection failure prevention apparatus according to claim 1,
The first ink mist adsorbing unit also captures paper dust scattered from the running continuous paper.

An ink jet printer according to claim 4 of the present invention is
A discharge failure prevention device for an ink jet print head according to any one of claims 1 to 3 is provided.

A method for preventing ejection failure of an ink jet print head according to claim 5 of the present invention includes:
A method for preventing ejection failure of an inkjet print head provided in an inkjet printer, which is a continuous paper wound in a roll and is printed on a continuous paper that has been unwound and traveled in a predetermined direction,
The ink jet print head has a discharge nozzle that discharges ink of a specific color for printing the continuous paper in either a single color or a color, and is at a predetermined position in the ink jet printer with respect to the continuous paper that is running. It is supposed to be fixedly arranged,
It is characterized by using the ejection failure prevention device of the ink jet print head according to any one of 請 Motomeko 1 to claim 3 hits the printing on the continuous paper.

  According to the present invention, it is possible to provide an inkjet print head ejection failure prevention apparatus and method that can be easily and quickly installed in any inkjet printer without requiring a large-scale apparatus at a low cost.

An inkjet printing machine that is an application target of an ejection failure prevention device for an inkjet print head according to an embodiment of the present invention includes a paper feeding device installed in an upstream process, a folding device installed in a downstream process, a section device, It is a figure shown with a chopper apparatus. 1 is a side view schematically showing an ejection failure prevention device for an inkjet print head according to an embodiment of the present invention, together with an inkjet print head provided in an inkjet printer to which the present invention is applied, and a continuous paper transport mechanism. It is the top view which looked at the inkjet print head provided with the ejection failure prevention device of the inkjet print head concerning one embodiment of the present invention from the nozzle side. It is a top view which shows the ink mist adsorption | suction curtain which is the 1st ink mist adsorption | suction means of the discharge failure prevention apparatus of the inkjet print head which concerns on one Embodiment of this invention. It is a bottom view which shows the ink mist adsorption | suction tray which is the 2nd ink mist adsorption | suction means of the discharge failure prevention apparatus of the inkjet print head which concerns on one Embodiment of this invention. It is the side view which looked at the ink mist adsorption | suction receptacle shown in FIG. 5 from the longitudinal direction side. FIG. 7 is one end view (FIG. 7A) in the longitudinal direction of the ink mist suction tray shown in FIG. 5 and the other end view (FIG. 7B). It is a side view explaining the effect | action of the ejection failure prevention apparatus of the inkjet print head which concerns on one Embodiment of this invention. It is a bottom view which shows the modification of the ink mist adsorption | suction tray shown in FIG. FIG. 10 is a view showing a modified example of the ink mist suction tray shown in FIG. 5, and is a side view (FIG. 10 (a)) seen from the X (a) -X (a) direction shown in FIG. 9 and a longitudinal direction shown in FIG. 9. It is an end view (Drawing 10 (b)) of one direction. It is a figure which shows the process of attaching a nonwoven fabric to the ink mist adsorption | suction tray shown in FIG.9 and FIG.10. It is a figure following FIG. 11 which shows the process of attaching a nonwoven fabric to the ink mist adsorption | suction tray shown in FIG.9 and FIG.10. It is a figure of the prior art example for clarifying the predominance of this invention. It is a figure which clarifies the predominance of this invention in relation to the prior art example shown in FIG.

  An inkjet printhead ejection failure prevention device according to an embodiment of the present invention (hereinafter referred to as “this embodiment”) is a continuous paper wound in a roll shape, and is unrolled and travels in a predetermined direction. This is an ejection failure prevention device for an inkjet print head provided in an inkjet printer for printing on continuous paper. The ink jet print head is fixedly arranged at a predetermined position in the ink jet printer with respect to the running continuous paper. In addition, with the ink jet printer installed, an ink mist that adsorbs ink mist scattered from the ink jet print head to at least one of the continuous paper entrance side and the continuous paper entrance side of the ink jet print head in the running direction of the continuous paper. The suction curtain (first ink mist suction portion) is disposed, and the ink mist is disposed below the continuous paper in the printing area formed between the continuous paper entrance side and the continuous paper entrance side of the inkjet print head. An ink mist adsorbing tray (second ink mist adsorbing portion) that adsorbs the ink is disposed over a predetermined area.

  The apparatus for preventing ejection failure of an ink jet print head according to the present embodiment includes a paper dust intrusion prevention unit that prevents paper dust scattered from the running continuous paper from entering the print area. It is further provided on the inlet side.

  The ink jet printer according to the present embodiment can perform color printing on continuous paper, and the printing area has different colors for color printing on continuous paper arranged in the running direction of the continuous paper. A plurality of print areas corresponding to the plurality of inkjet print heads.

  In addition, the ejection failure prevention device for an inkjet print head according to the present embodiment uses the ink mist suction curtain (first ink mist suction portion) provided in a plurality of printing areas to disperse from continuous paper that is running. Has come to catch.

  Hereinafter, an ejection failure prevention device for an inkjet print head according to the present embodiment will be specifically described with reference to the drawings. It should be noted that the dimensions and shapes of the constituent elements shown in the drawings are exaggerated as appropriate in order to facilitate understanding of the description, and it is needless to say that all of them do not necessarily show actual dimensions and shapes. .

  FIG. 1 shows a sheet feeding device 20 installed in an upstream process of an inkjet printer 10 to which the ejection failure prevention apparatus 1 for an inkjet print head according to this embodiment is applied, and a folding apparatus installed in the downstream process. FIG. 30 is a view showing a section device 40, a section device 40, and a chopper device 50.

  The ink jet printer 10 is a continuous paper that is continuously run by unfixing an ink jet print head H at a predetermined position with respect to the continuous paper W that is unrolled and run at a constant speed. This is a device that performs monochrome or color printing on one or both sides of W. The folding device 30 is a device that cuts and folds the continuous paper W continuously supplied from the inkjet printer 10 into a predetermined length. The section device 40 is a device that accumulates the printing paper cut and folded by the folding device 30 for each type of printed matter. The chopper device 50 is a device that folds the printed matter accumulated by the section device 40 into a predetermined size. These devices enable printing while mixing various printed materials such as newspapers, magazines, leaflets, catalogs, and manuals.

  FIG. 2 is a side view schematically illustrating the inkjet print head ejection failure prevention device 1 according to the present embodiment, together with the inkjet print head H provided in the inkjet printer 10 to which the present invention is applied, and a continuous paper transport mechanism. . FIG. 3 is a plan view of the inkjet print head H provided with the inkjet print head ejection failure prevention device 1 according to the present embodiment as viewed from the nozzle side.

  As can be seen from FIGS. 2 and 3, the ink jet printer (hereinafter simply referred to as “printer”) 10 according to the present invention has a plurality of locations (this embodiment) from the upstream side to the downstream side in the running direction of the continuous paper W. In this case, four different color printing areas are sequentially provided, and color printing on the continuous paper W is possible. Each print area includes a plurality of print areas corresponding to a plurality of inkjet print heads H that eject inks of different colors arranged in the running direction of the continuous paper W in order to perform color printing on the continuous paper W. A black, cyan, magenta, and yellow printing region is formed from the upstream side in the running direction of the continuous paper W. The four inkjet print heads H1, H2, H3, and H4 (H) corresponding to these are also fixedly disposed on the member support frame 10f of the inkjet printer 10 according to the print area around each print area. In the case of this embodiment, the inkjet print heads H1, H2, H3, and H4 are filled with black, cyan, magenta, and yellow water-based inks, and the respective inks are respectively nozzles Hn1, Hn2, Hn3, and Hn4 (see FIG. 3) to the continuous paper W at high speed. Needless to say, in color printing, the corresponding colors of the ink jet print head applied to the present invention are not limited to these four colors.

  As described above, the print head H in the present embodiment has a plurality of inkjet print heads H fixedly arranged for each print area as shown in FIG. 3 in order to accurately print on the continuous paper W running at high speed. Yes. The number of inkjet print heads H is determined by the resolution of printing on the continuous paper W and the running speed of the continuous paper W. For example, in the case of double-sided color newspaper, a minimum of 40 and a maximum of 80 inkjet print heads H are installed inside the printing press. The member support frame 10f is fixedly disposed. The number of ink jet print heads H is merely an example. Therefore, the number of inkjet print heads H may change as the running speed of the continuous paper W increases and the printing resolution further improves.

  The continuous paper W is fed in a constant direction at a very high speed of, for example, 150 m to 200 m per minute via a plurality of feed rollers R (see FIG. 2) arranged at predetermined intervals in the running direction. Since each ink jet print head H is fixedly arranged on the ink jet printer 10 as described above, ink is ejected from the nozzle Hn of the ink jet print head H to a predetermined print area of the continuous paper W running at an extremely high speed. Thus, predetermined printing is instantaneously performed on the surface of the continuous paper W.

  For this reason, the printing machine 10 having a plurality of inkjet print heads H to which this embodiment is applied is essentially different from a general home printer or the like in which a single inkjet print head itself moves, and is extremely different. It can be understood that a large number of high-precision and expensive inkjet print heads H have a structural characteristic of being fixedly arranged on the printing press 10.

  Next, the ink mist suction curtain (first ink mist suction unit) 100 according to the present embodiment will be described. FIG. 4 is a plan view showing the ink mist suction curtain 100 of the inkjet print head ejection failure prevention apparatus 1 according to an embodiment of the present invention.

  The ink mist adsorption curtain 100 includes, for example, a nonwoven fabric fixing bar 110 made of stainless steel such as SUS, a nonwoven fabric 150 whose upper end is fixed by the nonwoven fabric fixing bar 110 and suspended in a curtain shape, and a nonwoven fabric anti-fluttering sheet 160. Yes. In the present embodiment, the nonwoven fabric fixing bar 110 is fixed to or removed from two elongated rods having a rectangular cross section made of stainless steel and the nonwoven fabric 150 and the nonwoven fabric anti-flicker sheet 160 sandwiched between these rods. At this time, a non-woven fabric fixing adjusting screw 120 is provided which creates a gap between the two rod-shaped bodies and removes it from the non-woven fabric fixing bar 110. The nonwoven fabric fixing bar 110 has a length corresponding to the width of the continuous paper W. As a result, the nonwoven fabric 150 having a sufficient width to adsorb the ink mist can be suspended in a curtain shape.

  In addition, on one end side of the upper side of the nonwoven fabric fixing bar 110, when the nonwoven fabric 150 that has adsorbed sufficient ink mist is replaced with a new nonwoven fabric 150, the ink mist adsorption curtain 100 is directed upward toward the upper side of the printing machine 10. A handle 130 for pulling out from the member support frame 10f is provided.

  As the non-woven fabric 150, a non-woven fabric optimal for adsorbing ink mist is used. Further, the shape of the nonwoven fabric 150 has a length that corresponds to the width of the continuous paper W when the ink mist adsorption curtain 100 is attached, and has a width that is effective for adsorbing the ink mist. Yes. In addition, the nonwoven fabric 150 may be comprised from the nonwoven fabric 150 of 1 sheet, and may be comprised in the state which arranged many nonwoven fabrics 150 in the width direction of the running direction of the continuous paper W. FIG.

  The non-woven fabric flutter prevention sheet 160 is made of a resin charging sheet or the like, and has a size corresponding to the non-woven fabric 150. In the case of this embodiment, the nonwoven fabric 150 and the nonwoven fabric flutter prevention sheet 160 are the nonwoven fabric 150 on the upstream side in the running direction of the continuous paper W with respect to the running direction of the continuous paper W. In a state where both are overlapped so as to be on the downstream side in the traveling direction, the upper end is sandwiched between the nonwoven fabric fixing bars 110 and suspended in a curtain shape. This prevents the nonwoven fabric 150 from fluttering due to the traveling wind generated when the continuous paper W travels at a high speed. It should be noted that it is not an essential requirement to provide the anti-flicker sheet in the present invention, and it is within the scope of the present invention even if such an anti-flutter sheet is not provided.

  Since the ink mist suction curtain 100 includes a nonwoven fabric fixing bar 110, the nonwoven fabric fixing bar 110 is disposed between the inkjet print heads H1, H2, H3, and H4 shown in FIG. 3 and the continuous paper intrusion exit side of the inkjet print head H4. The ink mist suction curtain 100 is detachably fixed to the support frame 10f of the printing press 10. In installing and removing the ink mist adsorption curtain 100, the ink mist adsorption curtain 100 is installed at a predetermined position of the printing machine 10 through a handle 130 provided on the nonwoven fabric fixing bar 110, and the nonwoven fabric 150 is suspended. It can be lowered or removed from a predetermined position of the printing press 10.

  Next, the ink mist suction tray 200 (second ink mist suction portion) according to the present embodiment will be described. FIG. 5 is a bottom view showing the ink mist adsorption tray 200 of the inkjet print head ejection failure prevention apparatus 1 according to an embodiment of the present invention. FIG. 6 is a side view of the ink mist adsorption tray 200 shown in FIG. 5 viewed from the side in the longitudinal direction. FIG. 7 is an end view (FIG. 7A) in the longitudinal direction of the ink mist adsorption tray 200 shown in FIG. 5 and an end view of the other (FIG. 7B).

  The ink mist adsorption tray 200 is composed of, for example, a tray main body 210 made of an elongated plate-like member made of stainless steel, and is also made of stainless steel. The ink mist suction tray 200 is attached to the printing machine 10 with the ink mist suction tray 200 attached to the printing press 10. It has the nonwoven fabric fixing | fixed part 220 arrange | positioned at a lower surface. The tray main body 210 has a length and a width sufficient to adsorb the ink mist floating around the continuous paper W while the continuous paper W is traveling.

  Specifically, the length of the tray body 210 is a length corresponding to the width of the continuous paper W, and the width of the tray body 210 is arranged side by side at a predetermined interval in order to run the continuous paper W at a high speed. It is slightly smaller than the interval between the feed rollers. In addition, at one end in the longitudinal direction of the tray body 210, a tray positioning engagement piece 211 that is bent in an L shape is formed to extend, and at the other end, 2 that is bent into an L shape. Two tray fixing engaging pieces 212 are formed extending at predetermined intervals in the width direction of the tray body 210.

  Then, a positioning notch 211a (see FIG. 7) for engaging the ink mist suction tray 200 with the guide roller support frame 10g (see the two-dot chain line in FIG. 2) of the printing press 10 is provided on the tray positioning engagement piece 211. ) Is formed. The ink mist suction tray 200 is temporarily attached to the guide roller support frame 10g of the printing press 10 by engaging the positioning notch 211a with a positioning pin of the guide roller support frame 10g (not shown). Yes.

  In addition, an ink mist suction tray 200 is attached to the guide roller support frame of the printing machine 10 on the two tray fixing engagement pieces 212 provided on the opposite side of the tray positioning engagement piece 211 in the longitudinal direction of the tray body 210. A fixing notch 212a (see FIG. 7) for fixing to 10g is formed. Then, the ink mist suction tray 200 is fixed to a part of the guide roller support frame 10g of the printing press 10 by fastening and fixing to a part of the guide roller support frame 10g of the printing press 10 with a screw or the like through the fixing cutout portion 212a. It is designed to be firmly fixed.

  The nonwoven fabric fixing portion 220 of the ink mist adsorption tray 200 is slightly smaller in length and width than the tray body 210, and when the nonwoven fabric 250 is covered, the nonwoven fabric 250 is entirely placed on this surface on the top surface of the tray body 210. It has a certain height so as to be closely attached. And in the case of this embodiment, the bolt attachment female screw part which is not illustrated is formed in the longitudinal direction of the nonwoven fabric fixing | fixed part 220 over four places at predetermined intervals.

  The non-woven fabric 250 is covered so as to cover the entire upper surface of the saucer body, and then both end portions thereof are folded back to the non-woven fabric fixing portion side and overlapped on both sides of the bolt mounting female screw portion formed at the center in the width direction of the non-woven fabric fixing portion 220. It has a possible size (see the nonwoven fabric 250 indicated by the thick dotted line in FIG. 7).

  As described above, both ends of the nonwoven fabric 250 are overlapped so as to cover the bolt mounting female screw portion of the nonwoven fabric fixing portion 220, and then the nonwoven fabric holding bolt 221 is screwed into the four bolt mounting female screw portions formed on the nonwoven fabric fixing portion 220. The end portion of 250 is fixed to the nonwoven fabric fixing portion 220. At this time, since the nonwoven fabric fixing part 220 has a slight height over the entire longitudinal direction (see FIGS. 6 and 7), the nonwoven fabric 250 is placed on the tray body 210 and the end thereof is covered. The non-woven fabric 250 is covered with the bolt mounting female screw portion and fixed with the non-woven fabric holding bolt 221 so that a uniform tension is applied to the entire non-woven fabric 250 depending on the height of the non-woven fabric fixing portion 220. The upper surface of 210 is firmly in contact so that undesirable phenomena such as undulations do not occur.

  In this embodiment, the non-woven fabric 250 used for the ink mist adsorption tray 200 used may be a single non-woven fabric 250 having a size corresponding to this, and a plurality of non-woven fabrics 250 having a narrow width and not so large. The ink mist suction tray 200 may be arranged side by side in the longitudinal direction and attached to the ink mist suction tray 200.

  Moreover, as the nonwoven fabric 250 used for the ink mist adsorption tray 200, in the present embodiment, the same nonwoven fabric 250 as the nonwoven fabric 150 used for the ink mist adsorption curtain 100 described above is used. Thereby, it is possible to use any nonwoven fabric of the ink mist adsorption curtain 100 and the ink mist adsorption tray 200 only by preparing and storing a single type of nonwoven fabric. Has achieved cost reduction and ease of management.

  When the ink mist suction tray 200 is attached to the printing machine 10, the tray fixing engagement piece 212 formed at one end of the tray body 210 is positioned on the positioning pin provided on one guide roller support frame 10 g of the printing machine 10. The printing press 10 uses the fixing notch 212a of the tray fixing engagement piece 212 formed at the other end of the tray main body 210 to be engaged through the mounting positioning notch portion 211a of the engagement piece 211. This can be done simply by screwing a thumbscrew or the like into the other guide roller support frame 10g.

  Further, when the nonwoven fabric 250 attached to the ink mist suction tray 200 is considerably dirty, the ink mist suction tray 200 can be easily removed from the printing machine 10 by performing the reverse operation to the above-described operation, and the new article is left as it is. Can be easily and quickly replaced with the non-woven fabric 250.

  Next, a paper dust intrusion prevention curtain 300 as a paper dust intrusion prevention unit that prevents paper dust scattered from the running continuous paper W from entering the printing area will be described. In the present embodiment, the paper dust intrusion prevention curtain 300 is provided on the continuous paper entry direction side of the continuous paper running direction of the inkjet print head H1 corresponding to the first printing area located on the most upstream side in the running direction of the continuous paper W. Thus, paper dust is prevented from entering the first printing area. The specific configuration of the paper dust intrusion prevention curtain is exactly the same as that of the ink mist adsorption curtain 100 described above, and a specific description of the configuration is omitted. The method of attaching or removing the paper dust intrusion prevention curtain 300 to or from the member support frame 10f of the printing press 10 is the same as that of the ink mist adsorption curtain 100.

  Further, in other printing areas, that is, the second to fourth printing areas, the ink mist suction curtain 100 provided in the first ink jet print head H1 prevents paper dust from entering the second printing area. The ink mist suction curtain 100 provided in the second inkjet print head H2 prevents paper dust from entering the third printing area, and the ink mist suction curtain 100 provided in the third inkjet print head H3 is the fourth. Prevents paper dust from entering the printing area, and prevents the ink mist suction curtain 100 provided in the fourth inkjet print head H4 from scattering downstream from the fourth inkjet print head H4. doing.

  Next, the operation of the inkjet print head ejection failure prevention apparatus 1 according to an embodiment of the present invention will be described. FIG. 8 is a side view for explaining the operation of the ejection failure prevention device 1 for an inkjet print head according to an embodiment of the present invention.

  In addition, regarding the operation of the present embodiment below, a case will be described in which the present embodiment is applied to printing of newspaper that is color-printed. As shown in FIG. 8, in the case of newspaper, the continuous paper W unwound from the roll passes through a predetermined printing area at a high speed of, for example, 200 m per minute. As shown in FIG. 8, the predetermined print area corresponds to a first print area corresponding to black from the left, a second print area corresponding to cyan, a third print area corresponding to magenta, and yellow. The fourth printing area is composed of four types of printing areas. As described above, each ink jet print head H is provided with an ink mist suction curtain 100 at a predetermined position, and an ink mist suction tray 200 is disposed below each adjacent area. In addition, a paper dust intrusion prevention curtain 300 is provided on the continuous paper entry entrance side of the print area corresponding to the continuous paper W of the inkjet print head H1 corresponding to the first upstream print area in the continuous paper running direction. Is attached.

  When the color printing operation is started, the color ink corresponding to each ink jet print head H fixedly arranged on the ink jet printer 10 is ejected to a predetermined area of the continuous paper W while the continuous paper W travels at a high speed. A part of the ejected ink is not printed on the paper surface, but is scattered as a minute ink mist in the surrounding space such as the lower side of the inkjet print head H or the lower side of the continuous paper W and floats in this space. . Ink mist floating in such a space is depicted in a black teardrop shape in FIG. In addition, it goes without saying that the ink mist in FIG. 8 is drawn extremely greatly exaggerated in order to facilitate understanding of the explanation of this operation.

  In addition, paper dust generated when the continuous paper W wound in a roll is unwound or paper dust generated during traveling from the continuous paper W traveling toward the printing area tends to enter the printing area. . In each printing area, the continuous paper W is fed at a high speed via the feed roller R, and ink is constantly ejected from the nozzles of the inkjet print head H toward the continuous paper W. Even in the area, paper dust is generated, and the paper dust scatters and floats in a space such as the lower side of the inkjet print head H, the periphery thereof, or the lower side of the continuous paper W.

  Ink mist and paper dust are scattered and floated in each printing area as described above. According to this embodiment, the ink mist suction curtain 100 and the ink mist suction tray 200 are based on the following detailed reason. By having the paper dust intrusion prevention curtain 300, the amount of floating in the space around each print area of ink mist and paper dust can be considerably reduced.

  As a general phenomenon, after ink mist adheres to the ink jet print head H, paper dust adheres to the portion where the ink mist adheres, and the ink mist and paper dust in this portion are mixed to form a slurry. It dries and adheres to the inkjet print head H. Therefore, by attaching the ink mist to the ink mist suction curtain 100 and the ink mist suction tray 200, the amount of ink mist floating in the print area space can be reduced, and the ink mist attached to the inkjet print head H can be reduced. Extremely reduced.

  Further, a paper dust intrusion prevention curtain 300 having the same configuration as the ink mist suction curtain 100 described above is provided on the continuous paper entrance side of the ink jet print head H located on the most upstream side in the continuous paper running direction of the printing area. Therefore, the paper dust is prevented from entering the printing area located on the most upstream side in the running direction of the continuous paper W. In the present embodiment, the ink mist suction curtain 100 provided on the continuous paper entry / exit side of the print head H in each print area prevents paper dust from entering the print area on the downstream side adjacent to each print area. It also plays a role to prevent.

  In this way, it is possible to effectively prevent paper dust generated during unwinding of the continuous paper W wound in a roll shape or paper dust generated during high-speed running of the continuous paper W from entering each printing area. it can.

  For the above reasons, according to the present embodiment, the ink mist is adhered to the ink mist adsorption curtain 100 and the ink mist adsorption tray 200, and the paper dust is adhered to the paper dust intrusion prevention curtain 300 and the ink mist adsorption curtain 100. Further, it is possible to reduce the amount of paper powder that is scattered and floats in the space around the printing area.

  In addition, when the continuous paper W is printed as newspaper, the continuous paper W is manufactured to include various components such as white carbon made of calcium carbonate in order to prevent back-throwing. When traveling at high speed, it is scattered as paper dust. Therefore, according to the present embodiment, the above-described operation can be effectively exhibited when printing newspaper.

  As described above, according to the present embodiment, a version suitable for the type of each printing machine can be installed without incurring a significant cost increase associated with the installation of a large-sized apparatus such as an ink mist suction machine in the prior art. It is possible to provide an inkjet printhead ejection failure prevention apparatus 1 and method that can prevent problems caused by so-called ink mist. Moreover, since the same thing can be utilized about the nonwoven fabric for an ink mist curtain and an ink tray, low cost can be aimed at.

  Then, a problem caused by so-called ink mist, temporary non-ejection occurring due to adhering to the nozzle surface of the ink jet print head H, ejection failure, permanent non-ejection due to sticking due to adhesion of different types of ink, substrate, server, etc. It is possible to provide a high-quality, high-resolution inkjet printer 10 without causing a failure of peripheral electronic equipment of the apparatus.

  Furthermore, by installing the inkjet print head ejection failure prevention apparatus 1 according to the present embodiment, in addition to the problems caused by the so-called ink mist, so-called paper dust generated from the winding paper adheres to the inkjet print head and causes ejection failures. Factors can also be eliminated by installing a paper dust intrusion prevention curtain 300 in front of the ink jet print head (on the continuous paper entrance side of the ink jet print head H). In this way, in addition to the ink mist that causes the malfunction, there is an effect in eliminating the malfunction caused by so-called paper dust.

  Subsequently, a modified example of the above-described ink mist suction tray will be described. FIG. 9 is a bottom view showing a modified example of the ink mist suction tray shown in FIG. FIG. 10 is a view showing a modified example of the ink mist suction tray shown in FIG. 5, and is a side view as seen from the X (a) -X (a) direction shown in FIG. 9 (FIG. 10 (a)). 10 is an end view (FIG. 10B) on one side in the longitudinal direction shown in FIG.

  The ink mist suction tray 400 according to this modification is made of the same material as the ink mist suction tray 400, such as stainless steel, and has a substantially same outer diameter as that of the tray body. And a nonwoven fabric holding member 420 provided on the back surface of the tray body 410 when the ink mist suction tray 400 is attached. The tray main body 410 has a tray fixing piece 411 extending from both ends thereof, and four bolts made of thick thick plates at the center in the width direction on the back surface of the tray main body 410 and at predetermined intervals along the longitudinal direction. The screwed portion 430 is fixed. Each tray fixing piece 411 is provided with two fixing bolt insertion holes for fixing the ink mist adsorption tray 400 to the guide roller support frame 10g of the printing press 10, and each bolt screwing portion 430 includes Two female screw portions 430a into which bolts for fixing a nonwoven fabric sandwiching pressing plate 425 of the nonwoven fabric holding member 420 described later are screwed are formed. Note that the two fixing bolt insertion holes provided in one of the tray fixing pieces 411 are long holes, and the attachment position in the longitudinal direction of the ink mist suction tray 400 can be finely adjusted. .

  The nonwoven fabric holding member 420 includes a holding member main body 421 shown in FIG. 10 and a nonwoven fabric sandwiching pressing plate 425 shown in FIG. The holding member main body 421 is formed by bending, for example, two sheets of the same shape of elongated plate made of stainless steel in the width direction, and is fixed to the back surface of the saucer main body 410 with the same width from the base portion 421a. A vertical rising portion 421b rising vertically and a horizontal extending portion 421c extending from the vertical rising portion 421b with the same width in the horizontal direction. And each base part 421a is attached to the back surface of the saucer body 410 so that the longitudinal direction edge parts of the horizontal extension part 421c face each other with an interval of the extent that sandwiches the bolt screw-in part 430 in a plan view of the saucer body back surface. Yes.

  The nonwoven fabric sandwiching pressing plate 425 is made of a metal plate rich in springiness, has the same length and width as the upper surface of the bolt screw-in portion 430, and fixes the press plate that contacts the upper surface of the bolt screw-in portion 430. It consists of the part 425a and the nonwoven fabric pressing part 425b extended diagonally so that a space | interval may mutually expand from both sides of the pressing board fixing | fixed part 425a. The nonwoven fabric pressing portion 425b has a length that allows a part of the nonwoven fabric pressing portion 425b to be firmly pressed against the longitudinal edge of the horizontal extending portion 421c of the holding member main body 421 in a state where the nonwoven fabric sandwiching pressing plate 425 is in contact with the bolt screwing portion 430. have.

  A bolt insertion hole (not shown) is formed in the pressing plate fixing portion 425a of the nonwoven fabric sandwiching pressing plate 425 at a position corresponding to the female screw portion 430a of the bolt screwing portion 430. Further, the nonwoven fabric sandwiching pressing plate 425 can narrow the interval between the tips of the nonwoven fabric pressing portion 425b by an operator by hand and apply a force, and the horizontally extending portion 421c of the holding member main body 421. When the non-woven fabric sandwiching press plate 425 is fixed with bolts in a state in which the non-woven fabric 450 is applied to the opposite longitudinal edges, the elastic force is sufficient to prevent the non-woven fabric 450 from shifting.

  Next, a method for attaching the nonwoven fabric 450 to the ink mist adsorption tray 400 according to this modification will be described. FIG. 11 is a diagram illustrating a process of attaching the nonwoven fabric 450 to the ink mist adsorption tray 400 shown in FIGS. 9 and 10. Moreover, FIG. 12 is a figure following FIG. 11 which shows the process of attaching the nonwoven fabric 450 to the ink mist adsorption | suction tray 400 shown in FIG.9 and FIG.10.

  As shown in FIGS. 11A and 11B, after covering the upper surface of the saucer body 410 with the nonwoven fabric 450, each end of the nonwoven fabric 450 is attached to the nonwoven fabric holding member 420 along the width direction of the saucer body 410. After extending to the lower side surface of the horizontal extension portion 421c and pressing firmly against the longitudinal edge of the horizontal extension portion 421c, the nonwoven fabric 450 is in contact with the back surface of the horizontal extension portion 421c, that is, the surface facing the tray body 410. Wrap.

  Next, as shown in FIGS. 11 (c) and 11 (d), a force is applied to both sides of the nonwoven fabric pressing portion 425 b of the nonwoven fabric sandwiching pressing plate 425 so as to reduce the distance between the nonwoven fabric pressing portions. Let

  Next, as shown in FIG. 12E, the nonwoven fabric sandwiching press plate 425 is inserted between the horizontally extending portions 421c facing each other in a state where the spacing between the nonwoven fabric presser portions of the nonwoven fabric sandwiching press plate 425 is further narrowed. The plate fixing part 425a is brought into contact with the upper surface of the bolt screw-in part 430.

  Next, as shown in FIG. 12 (f), when the force applied to the nonwoven fabric presser portion 425b of the nonwoven fabric sandwiching pressing plate 425 is released, the nonwoven fabric sandwiching presser plate 425 returns to its original shape, and the longitudinal edge of the horizontal extending portion 421c The nonwoven fabric 450 folded back at the portion is sandwiched between the nonwoven fabric pressing portion 425b of the nonwoven fabric sandwiching pressing plate 425 and the horizontal extending portion 421c of the nonwoven fabric holding member 420.

  Next, as shown in FIG. 12G, the pressing plate fixing bolt 431 is inserted into a bolt insertion hole (not shown) of the nonwoven fabric sandwiching pressing plate 425, and the male screw portion of the pressing plate fixing bolt 431 is inserted into the bolt screwing portion 430. The non-woven fabric 450 is screwed into the female screw portion 430a, and the non-woven fabric 450 is firmly attached to the ink mist adsorption tray 400 without being displaced.

  The new nonwoven fabric 450 can be easily attached to the ink mist adsorption tray 400 by the procedure as described above. Further, the ink mist suction tray 400 having the ink mist and the used non-woven fabric 450 which has been solidified by adhering paper dust to the ink mist is removed from the printing machine 10 and the nonwoven fabric 450 soiled from the ink mist suction tray 400 is removed. When removing, you can easily finish the procedure by reversing this procedure.

  When the ink mist suction tray 400 is attached to or detached from the guide roller support frame 10g of the printing press 10, the bolts are tightened or loosened through the fixing bolt insertion holes formed in the tray fixing pieces 411 and 412, respectively. And do it. Since the two fixing bolt insertion holes of the tray fixing piece 411 are long holes, they can be attached to the guide roller support frame 10g while adjusting the longitudinal position of the ink mist suction tray 400.

  As is clear from the above description, by using the ink mist suction tray 400 according to this modification, even the worker who is not used to the nonwoven fabric replacement work cleans the upper surface of the ink mist suction tray 400 with the nonwoven fabric 450. A reliable operation for covering can be performed in a very short time, and the operation rate of the printing press 10 can be prevented from being lowered by such a maintenance time.

  Finally, an inkjet printing machine equipped with an ejection failure prevention device for an inkjet print head according to the present invention is used as a present embodiment, and an inkjet printing machine not equipped with an ejection failure prevention device for an inkjet print head is used as a comparative example. A state in which printing is performed using the above will be described in comparison with the drawings.

  FIG. 13 is a side view illustrating a case where printing is performed using the comparative example. FIG. 14 is a side view for explaining a case where printing is performed using the present embodiment. 13 and 14, in order to facilitate understanding of the description, among the inkjet print heads shown in FIG. 2, the inkjet print for black ink that is fixedly arranged on the most upstream side in the running direction of the continuous paper W. Only the head is shown. In FIG. 13 and FIG. 14, the inkjet print head for black ink is shown on the most upstream side as an example. However, this is merely an example, and the inkjet print head corresponding to another color is most upstream. Needless to say, it may be arranged in the.

  In FIGS. 13 and 14, the states of the inkjet print heads shown in (t1) to (t4) indicate the states in which different times have elapsed from the time when the printing operation was started. Specifically, t1 <t2 <t3 <t4, and shows a state in which more printing time has passed from the left side to the right side in FIGS.

  In this comparative example, the ink mist of the ink jet print head (illustrated in the shape of a teardrop in the figure) in this printing area during the lapse of time from the printing time shown in FIG. 13 (t1) to the printing time shown in (t4). It can be understood that the amount of ink mist increases and the ink mist adheres to the nozzle portion of the ink jet print head. It can also be seen that paper dust (shown by white circles in the figure) generated when unrolling the continuous paper wound in a roll enters the printing area as it is.

  And it turns out that paper dust adheres to the ink mist adhering to the nozzle part of an inkjet print head, and these become slurry form, and eventually adhere to the nozzle part of an inkjet print head, and cause malfunction of an inkjet print head. (See the combination of white circles and diagonal lines shown in bold in FIG. 13). In addition, it can be understood that the ink mist and paper dust that increase as the printing time elapses reach and adhere not only to the periphery of the ink jet print head but also to a server or substrate (not shown here) above the ink jet print head. .

  As described above, in the comparative example shown in FIG. 13, as the printing time elapses, the inkjet print head is seriously damaged, and eventually the inkjet print head malfunctions, which cannot be handled only by cleaning, and is expensive. It can be seen that the inkjet printhead needs to be replaced.

  On the other hand, in the case of the present embodiment shown in FIG. 14, the ink mist of the ink jet print head in the print area (the teardrop shape in the figure) during the lapse of time from the printing time shown in (t1) to the printing time shown in (t4) in FIG. It can be seen that most of these do not stay in the lower space around the print area, but are adsorbed by the ink mist adsorption curtain or ink mist adsorption tray. In addition, since a paper dust intrusion prevention curtain is arranged on the continuous paper entrance side of the inkjet print head, paper dust generated when unrolling the continuous paper wound in a roll shape (illustrated by white circles in the figure) It can be seen that almost does not enter the print area. Also, even if paper dust enters the printing area or paper dust is generated from continuous paper running in the adjacent area, these paper dust is already adsorbed in the ink mist adsorption curtain and ink mist adsorption tray. It can be seen that it adheres to the ink mist thus formed and eventually solidifies (see the combination of white circles and diagonal lines shown in bold in FIG. 14).

  As a result, even if the printing time has passed for a long time after continuous printing, as shown by (t4) in FIG. 14, the ink mist and paper dust are below the inkjet print head and under the corresponding continuous paper. It can be seen that the ink does not stay in the side space, that is, the space around the print area, and hardly adheres to the nozzle portion of the inkjet print head. As a result, according to the present embodiment, it can be understood that an expensive ink jet print head can be used for a long period of time only by performing maintenance work for periodically replacing the ink mist suction curtain and the ink mist suction tray.

  As described above, since the present invention has such a configuration, the amount of ink mist and paper dust in the printing area during printing can be greatly reduced, so that the ink mist adheres to the nozzle portion of the inkjet print head. Thus, it is possible to prevent the paper mist from further adhering to the portion where the attached mist is accumulated to become liquid ink and sticking to the ink jet print head in a state where the ink mist and paper powder are mixed. As for the above-mentioned specific action of the present invention, the ink mist and paper dust shown in FIG. 14 are combined and adhered to the vicinity of the nozzle portion of the inkjet print head as shown by a combination of circles and diagonal lines. It can be understood from.

  As described above, according to the present invention, after performing a printing operation for a certain period, the ink mist adsorption curtain and the ink mist adsorption tray are removed from the apparatus in the manner of the above-described replacement work, and ink mist and paper dust are adsorbed from each. Then, the soiled non-woven fabric is removed and replaced with a new non-woven fabric, and the ink mist adsorption curtain and the ink mist adsorption tray with the new non-woven fabric can be easily attached to the apparatus again. In addition to this, when the ink mist suction curtain and the ink mist suction tray are removed from the apparatus, dirty portions around the ink jet print head can be cleaned. In this way, after the cleaning work around the printing area of the printing press is completed in a short time, the printing work can be started again.

  Further, according to the present invention, by completing the cleaning in the printing area in a minimum time, it is possible to drastically reduce the occurrence of continuous paper that does not require printing due to the clogging of the nozzles of the ink jet print head, and the printing machine. The operating efficiency can be significantly improved. As a result, the advantages of a digital printing machine suitable for high-mix low-volume production can be fully enjoyed.

  In addition, according to the present invention, the ink mist or paper powder is integrated into the nozzle part of the inkjet print head while the printing operation is proceeding as in the past, and after being formed into a slurry, the nozzle is clogged. In the worst case, it is possible to prevent the clogging of the nozzles from becoming severe and the continuous use of the ink jet print head from becoming impossible. In such a state, the expensive ink jet print head itself must be replaced, resulting in unexpected expenses. In addition, since it is necessary to fix and arrange the inkjet print head at the exact position of the printing press, it takes a lot of work and time to locate the head when replacing it with a new inkjet print head. , It is possible to avoid such a problem.

  Similarly, according to the present invention, the ink mist and paper powder adhere to the server or substrate of the printing press and are integrated into a slurry and then fixed, causing the device to fail and the device itself to be used continuously. It is also possible to prevent the worst situation from occurring.

  It should be noted that even if an ink mist or paper powder that is scattered and floating in the space around the print area near the ink jet print head is forcibly sucked by the suction nozzle, the suction nozzle is arranged in a complicated printing mechanism. Obviously, the difficulty and cost increase due to the provision of a dedicated suction mechanism. Moreover, there is a possibility that the running state of the continuous paper running at high speed may be adversely affected by applying a negative pressure to the local portion by the suction nozzle to forcibly suck the ink mist and paper dust.

  In addition, if the suction nozzles of the floating material suction mechanism represented by ink mist are arranged in many places in the printing area of the ink jet printing machine, the mechanism of the printing machine is not only complicated, but further. By arranging the suction nozzle, the operator's hand is difficult to enter during regular maintenance of the printing press, which greatly impedes maintenance work. Furthermore, if it is going to simplify the structure of a suction mechanism, the sucked floating substance will be discharged | emitted in the building in which the printing machine was installed, and working environment will deteriorate extremely.

  On the other hand, if the sucked paper dust is discharged as it is outside the building where the printing machine is installed, the surrounding environment will be deteriorated. Therefore, in any case, a considerably large suction facility is installed, which causes a problem in terms of cost. In addition, problems with the processing of ink mist and paper dust after suction also arise. For this reason, providing a suction mechanism with a suction nozzle in a printing press causes various other problems and cannot be a practical measure. Therefore, the present invention is also excellent in this respect. ing.

  Note that the ink mist suction curtain, which is the first ink mist suction section in the present invention, does not necessarily have to be provided in all of the plurality of print areas, and even if it is provided in at least one print area. It is possible to demonstrate. Further, the ink mist suction tray that is the second ink mist suction portion in the present invention does not necessarily have to be provided in all of the plurality of print areas, and even if it is provided in at least one print area. It is possible to exert an effect. In addition, the size of the ink mist suction tray 200 is not necessarily equal to the size of the printing area of the continuous paper corresponding to the size, and even if it is smaller than this, a certain effect is exhibited. It is possible.

  Further, in the present invention, among the plurality of print areas, paper dust in which all of the ink mist suction curtain that is the first ink mist suction portion provided between adjacent print areas is scattered from the running continuous paper. There is no need to capture it, and if at least one ink mist adsorption curtain can capture the paper dust scattered from the running continuous paper, it is possible to achieve a certain effect.

  Further, in the present invention, it is not necessary to provide the paper dust intrusion prevention unit on the upstream side in the running direction of the continuous paper in each of the plurality of print areas, and at least one paper dust intrusion prevention unit has a plurality of print areas. If it is provided in any one of them, a certain effect can be exhibited.

  In the above-described embodiment, the ink mist suction curtain is disposed on the continuous paper entry / exit side of each inkjet print head. However, the ink mist suction curtain is not necessarily disposed only on the continuous paper entry / exit side. Accordingly, an ink mist suction curtain may be arranged on the continuous paper entrance side of any or all printing areas. In this case, the ink mist suction curtain disposed on the continuous paper entrance side may have a role of a paper dust intrusion prevention curtain that prevents paper dust from entering as required.

  In addition, the ink mist adsorption curtain and the paper dust intrusion prevention curtain may be individually provided on the continuous paper entrance / exit side or the continuous paper entrance side of the inkjet print head without using both.

  In the above-described embodiment, the paper dust intrusion prevention unit is provided on the continuous paper entrance side of the ink jet print head. However, it may be provided on both the continuous paper entrance side and the continuous paper entrance side.

  In the above-described embodiment, the nonwoven fabric is used in the ink mist adsorption curtain. However, any material can be used as long as it effectively adsorbs ink mist and paper dust. For example, instead of the nonwoven fabric. A sponge or the like may be used. However, in the present invention, since the nonwoven fabric is used for the ink mist adsorption tray, the disposable ink mist adsorption medium can be unified with the nonwoven fabric by using the nonwoven fabric for the ink mist adsorption curtain. Thereby, cost reduction can be aimed at by purchasing a large amount of non-woven fabrics in a lump. In addition to this, the non-woven fabric used in the ink mist adsorption curtain is removed along with the replacement work of the non-woven fabric, and the ink mist and paper dust that adheres to and solidifies around the nozzles of the inkjet print head and the frame of the device are removed. It is easy to use during maintenance.

  In the above-described embodiment, the ink mist adsorption curtain is provided with the anti-flicker sheet in addition to the non-woven fabric. However, in the present invention, the anti-flicker sheet is not necessarily required. However, by providing the anti-flicker sheet, ink mist and paper powder can be effectively adsorbed to the nonwoven fabric without being affected by the running wind generated during running of continuous paper.

  In the above-described embodiment, a method for solving problems caused by ink mist and paper dust when performing color printing using inkjet print heads corresponding to four colors of black, cyan, magenta, and yellow is described. However, the present invention is not necessarily limited to solving such problems caused by ink mist and paper dust in the color printing process, and can be applied even when the inkjet print head is only a single color such as black. Needless to say. Specifically, the present invention can be applied to a case where one side is color printing and the other side is black monochrome printing in newspaper printing or the like.

  Regarding the number of ink jet print heads, the shape and size and material of the ink mist suction curtain, the shape and size and material of the paper dust intrusion prevention curtain, the shape and size and material of the ink mist suction tray in the contents described above, an example only Needless to say, it can be changed as appropriate as long as it is within the range in which the effect of the present invention is exhibited.

DESCRIPTION OF SYMBOLS 1 Ink jet print head ejection failure prevention device 10 Ink jet printer 10 g Guide roller support frame 10 f Member support frame 20 Paper feed device 30 Folding device 40 Section device 50 Chopper device 100 Ink mist adsorption curtain 110 Non-woven fabric fixing bar 120 Non-woven fabric fixing adjusting screw 130 Handle 150 Non-woven fabric 160 Non-woven fabric flutter prevention sheet 200 Ink mist adsorption tray 210 Receptacle body 211 Receptacle positioning engagement piece 211a Positioning cutout portion 212 Receptacle fixing engagement piece 212a Fixing cutout portion 220 Nonwoven fabric fixing portion 221 Nonwoven fabric restraint Bolt 250 Nonwoven fabric 300 Paper powder intrusion prevention curtain 400 Ink mist adsorption tray 410 Plate body 411, 412 Plate fixing piece 420 Nonwoven fabric holding member 21 Holding member body 421a Base part 421b Vertical rising part 421c Horizontal extension part 425 Non-woven fabric sandwiching pressing plate 425a Holding plate fixing portion 425b Non-woven fabric pressing portion 430 Bolt screwing portion 430a Female screw portion 431 Holding plate fixing bolt 450 Non-woven fabric H1, H2, H3 , H4 (H) Inkjet print head Hn1, Hn2, Hn3, Hn4 Nozzle R Feed roller W Continuous paper WR Continuous paper wound in roll shape

Claims (5)

A discharge failure prevention device for an inkjet print head provided in an inkjet printer that prints on a continuous paper that rolls in a roll and is continuous and travels in a predetermined direction after being unwound,
The ink jet print head has a discharge nozzle that discharges ink of a specific color for printing the continuous paper in either a single color or a color, and is at a predetermined position in the ink jet printer with respect to the continuous paper that is running. It is supposed to be fixedly arranged,
The ejection failure prevention device for the inkjet print head is disposed on at least one of the inlet side and the outlet side in the continuous paper running direction of the inkjet print head in a state where the inkjet printer is installed, and scatters from the inkjet print head. A first ink mist adsorbing portion that adsorbs ink mist, and a continuous area in the continuous paper running direction of the inkjet print head, arranged in a lower area than the continuous paper in the print area formed between the outlet side and the outlet side; An ejection failure prevention apparatus for an ink jet print head, comprising: a second ink mist adsorbing portion that adsorbs the ink mist. The inkjet printer is a printer that corresponds to the monochrome printing or color printing, preventing a plurality of the ink jet print head, paper dust scattered from the continuous sheet in said traveling from entering the printing area 2. The paper dust intrusion prevention unit to be provided is provided on the inlet side in the continuous paper running direction of at least the upstream of the plurality of inkjet print heads in the continuous paper running direction. Ink jet print head ejection failure prevention device.   2. The inkjet print head ejection failure prevention device according to claim 1, wherein the first ink mist adsorbing unit also captures paper dust scattered from the running continuous paper. 3.   An ink jet printing machine comprising the ink jet print head ejection failure prevention device according to any one of claims 1 to 3. A method for preventing ejection failure of an inkjet print head provided in an inkjet printer, which is a continuous paper wound in a roll and is printed on a continuous paper that has been unwound and traveled in a predetermined direction,
The ink jet print head has a discharge nozzle that discharges ink of a specific color for printing the continuous paper in either a single color or a color, and is at a predetermined position in the ink jet printer with respect to the continuous paper that is running. It is supposed to be fixedly arranged,
請 Motomeko 1 to any ejection failure prevention method for an ink jet print head, which comprises using the ejection failure prevention device of the ink jet print head according to claim 3 hits the printing on the continuous paper.

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