JP2007117963A - Coating apparatus for construction plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating apparatus for a construction plate capable of continuously performing coating during washing, cleaning and repairing a coating nozzle head, enhancing productivity and also solving a problem of an installation space. <P>SOLUTION: In the coating apparatus for the construction plate, a surface of the construction plate 1 is coated by injecting a coating from the coating nozzle head 3 of an ink jet type coating machine 2 arranged above a conveying conveyor 5 while the construction plate 1 is fed by the conveying conveyor 5. A guide rail 6 is provided on the conveying conveyor 5, a portion positioned just above the conveying conveyor 5 of the guide rail 6 is formed as a coating position zone 6a and both ends removed from a position just above the conveying conveyor 5 to a side are formed as stand-by zones 6b, 6c. Further, a pair of coating nozzle heads 3 is mounted to the guide rail 6 movably between the coating position zone 6a and the stand-by zones 6b, 6c. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a building board coating apparatus for coating the surface of a building board using an ink jet type coating machine.

  Conventionally, when painting building boards such as cement-based exterior boards, it is common to apply paint to the surface of building boards using a spray coater, roll coater coater, flow coater coater, etc. Is. However, with such sprays, roll coats, flow coats, etc., it is difficult to paint a complex pattern, especially to a building board with irregular irregularities such as an exterior board. . On the other hand, painting is also performed using printing rolls such as letterpress and intaglio, but in this case, the same pattern is repeatedly applied, which tends to be a monotonous pattern and the pattern to be painted. When changing, it is necessary to replace the printing roll, and it is not possible to paint a different pattern for each building board.

  Recently, it has been proposed to paint the surface of a building board by using an ink jet printer as a coating machine and spraying the paint from the coating nozzle head of the ink jet type coating machine while feeding the building board (for example, (See Patent Document 1).

  Inkjet coating machines can be applied to the surface of the building board in a non-contact manner using paint sprayed from the paint nozzle head, and by controlling the spray of paint from the paint nozzle head The paint can be sprayed to an arbitrary position on the building board so as to have an arbitrary pattern, and the building board having irregularities on the surface can be coated with a complicated pattern. In particular, the control of spraying paint from the painting nozzle head can be set for each building board supplied to the ink jet coating machine, so that it is possible to paint a different pattern for each building board. is there.

  Here, the coating nozzle head of an ink jet type coating machine is likely to become dirty due to mist generated when spraying the paint and the splash of the sprayed paint, etc. There is a risk that. For this reason, it is necessary to periodically clean and clean the coating nozzle head, and the line is stopped during the cleaning and cleaning, which causes a decrease in productivity. Further, when a failure such as nozzle clogging occurs in the coating nozzle head, it is necessary to stop the line while repairing the failure of the coating nozzle head, which similarly causes a decrease in productivity.

  On the other hand, Patent Document 2 relates to an invention in which a roll-shaped object to be coated is applied with an ink jet type coater, but as shown in FIG. 8, a roll-shaped object 32 wound around a winding core 31. A rail 33 for movement and a rail 34 for preliminary movement are provided in parallel so as to cross the upper side, and the coating nozzle head 3 a is movable on the rail 33 for movement, and the preliminary coating nozzle head 3 b is movable on the rail 34 for preliminary movement. It is attached to. The moving rail 33 and the preliminary moving rail 34 are respectively provided with standby portions 35 and 36 at their ends. In FIG. 8, 37 is a paint tank, and 38 is a paint supply hose for supplying paint to the paint nozzle heads 3a and 3b.

In this case, at the time of painting, the painting nozzle head 3a is arranged at a position directly above the roll-shaped object 32 of the moving rail 33, and the painting nozzle head 3a is used for painting. The coating nozzle head 3b is disposed in the standby portion 36 of the preliminary movement rail 34. When the coating nozzle head 3a fails, the coating nozzle head 3a is moved along the moving rail 33 to the standby unit 35, and the standby unit 35 repairs the coating nozzle head 3a. At the same time, the preliminary coating nozzle head 3b can be moved from the standby section 36 along the preliminary rail 33 to a position directly above the roll-shaped object 32, and the coating can be continued with the preliminary coating nozzle head 3b. Is.
JP 2005-74666 A JP 2004-313895 A

  Therefore, by applying the configuration of Patent Document 2 to the building board coating apparatus of Patent Document 1, in the apparatus of Patent Document 1, painting can be continued while cleaning, cleaning, and repairing the coating nozzle head. It becomes possible.

  However, in Patent Document 2, it is necessary to provide two rails 33, 34 in parallel, a moving rail 33 for moving the coating nozzle head 3a and a preliminary moving rail 34 for moving the preliminary coating nozzle head 3b. There is a problem that a large space for installing the rails 33 and 34 is required. In particular, when painting in full color in an ink jet coating machine, four coating nozzle heads 3 for injecting four types of paints of cyan, magenta, yellow, and black are required, but two coating nozzle heads 3 are provided for each coating nozzle head 3. When the rails 33 and 34 are installed, a total of eight are installed, and it is practically difficult to secure a device space.

  In addition, when the moving rail 33 and the preliminary painting nozzle head 3b are provided in parallel as in Patent Document 2, the painting nozzle head 3a for performing normal painting and the painting nozzle head 3a are coated while the painting nozzle head 3a is being repaired. Since the preliminary coating nozzle head 3b to be performed is arranged at a different position in the direction of transport of the building board, the coating nozzle head 3a and the preliminary coating nozzle head 3b are used when coating a predetermined position of the building board. In this case, it is necessary to control the injection of the paint by another control, and there is a problem that the control system becomes complicated. In particular, when four coating nozzle heads are used for painting in full color, the control system becomes more complicated.

  The present invention has been made in view of the above points, and can continuously perform coating while cleaning, cleaning, and repairing the coating nozzle head, thereby improving productivity and reducing the installation space. It is an object of the present invention to provide a building board coating apparatus that can solve the problem and that does not complicate the control of coating spraying of the coating nozzle head.

  The building board coating apparatus according to claim 1 of the present invention sprays paint from the coating nozzle head 3 of the ink jet type coating machine 2 disposed above the conveyor 5 while feeding the building board 1 by the conveyor 5. By this, it is the coating apparatus of the building board which was made to coat the surface of the building board 1, Comprising: While providing the guide rail 6 which straddles across the upper direction of the conveyance conveyor 5, it positions the guide rail 6 directly on the conveyance conveyor 5 The part to be coated is formed as a coating position zone 6a, and both end portions that are laterally removed from the position immediately above the conveyor 5 are formed as standby zones 6b and 6c, and the pair of coating nozzle heads 3 are connected to the coating position zone 6a and standby zones 6b and 6c It is characterized by being attached to the guide rail 6 so as to be movable between the two.

  Further, the invention of claim 2 is that, according to claim 1, the pair of coating nozzle heads 3 are connected so that both the coating nozzle heads 3 move integrally along the guide rail 6, and one coating nozzle head is formed. 3 is moved to the standby zones 6b and 6c, the other coating nozzle head 3 is positioned in the coating position zone 6a, and the other coating nozzle head 3 is moved to the standby zones 6b and 6c. It is characterized in that the nozzle head 3 is located in the coating position zone 6a.

  According to the present invention, of the pair of coating nozzle heads 3 attached to the guide rail 6, one coating nozzle head 3 is positioned in one standby zone 6 b of both ends of the guide rail 6 and is in a standby state. When the other coating nozzle head 3 is positioned in the coating position zone 6a immediately above the conveyor 5, the coating nozzle head 3 in the coating position zone 6a can be cleaned, cleaned or repaired. The coating nozzle head 3 is moved to the other preliminary set 6c, and at the same time, the coating nozzle head 3 waiting in the standby zone 6b is moved to the painting position zone 6a, and the coating nozzle head 3 continues painting. It can be applied with high productivity without having to stop the line. In addition, only one guide rail 6 is required, and a space for installing the guide rail 6 is small, and the problem of the installation space can be solved. Further, since the pair of coating nozzle heads 3 perform coating at the same position, the spray control of the paint can be performed by the same control, and the control of the spray of the paint nozzle head 3 is not complicated. .

  Hereinafter, the best mode for carrying out the present invention will be described.

  As shown schematically in FIG. 5, the coating apparatus includes a coating nozzle head 3 provided with a spray nozzle 4, a paint supply tank 11 that supplies paint to the spray nozzle 4 of the paint nozzle head 3, and a spray nozzle of the paint nozzle head 3. 4 includes an ink jet coating machine 2 provided with a coating control system 12 for controlling the spraying of paint from 4 and a transport conveyor 5 for transporting the building board 1.

  The coating nozzle head 3 is formed of four types of coating nozzle heads 3c, 3m, 3y, and 3k that eject paints of cyan, magenta, yellow, and black, so that full-color printing can be performed. is there. Similarly, the paint supply tank 11 is composed of four types. The paint supply tank 11c that supplies cyan paint is applied to the coating nozzle head 3c, and the paint supply tank 11m that supplies magenta paint is applied to the coating nozzle head 3m. The paint supply tank 11y for supplying yellow paint is connected to the coating nozzle head 3y, and the paint supply tank 11k for supplying black paint is connected to the coating nozzle head 3k. The spray nozzle 4 is provided to be opened on the lower surface of each coating nozzle head 3c, 3m, 3y, 3k, and each coating nozzle head 3c, 3m, 3y, 3k is fixed to the lower surface of the coating machine main body 13. .

  3 and 4, the coating nozzle heads 3c, 3m, 3y, and 3k are arranged along the conveying direction of the building board 1, and the coating nozzle heads 3c, 3m, 3y, and 3k are the building board 1. It is formed as a line head that is long in the direction perpendicular to the feed direction. Each of these coating nozzle heads 3 is provided with a plurality of (for example, 30) single heads 16 arranged in a line in the longitudinal direction of the coating nozzle head 3 as shown in FIG. The single head 16 is formed in a rectangular shape on the bottom surface, and a large number of jet nozzles 4 are formed on the bottom surface of the single head 16. The spray nozzles 4 are arranged in the longitudinal direction of the single head 16 at predetermined constant intervals. In the embodiment of FIG. 7, the spray nozzles 4 are provided in four rows on the single head 16. By attaching a plurality of single heads 16 provided with the spray nozzles 4 to the coating nozzle head 3 in the longitudinal direction in this way, a large number of spray nozzles 4 are arranged in the longitudinal direction of the coating nozzle head 3. Can be provided. Here, the single head 16 is attached to the coating nozzle head 3 with its longitudinal direction inclined at a predetermined angle with respect to the feeding direction of the building board 1. The pitch of the adjacent injection nozzles 4 in the direction perpendicular to the feed direction of 1 (the width direction of the building board 1) is reduced so that coating can be performed with high density dpi.

  In the embodiment of FIGS. 3 and 4, the coating nozzle heads 3c, 3m, 3y, and 3k are set as one set, and the two sets of coating nozzle heads 3c, 3m, 3y, and 3k are arranged in two rows in parallel. Narrow building board 1 is painted with one of the two sets of coating nozzle heads 3c, 3m, 3y, 3k, and a wide combination of two sets of coating nozzle heads 3c, 3m, 3y, 3k. The building board 1 can be painted.

  The painting control system 12 includes various CPUs, ROMs, RAMs, and the like, and includes a painting data creation unit, a painting control unit, an injection nozzle control unit, and the like. The painting data creation unit inputs and stores the color pattern data obtained by scanning the original image with a scanner or the like, and the painting control unit paints the color pattern data corresponding to the building board 1 to be painted. A control signal is output from the data creation unit to the ejection nozzle control unit based on the color pattern data. The spray nozzle control unit is connected to the spray nozzles 4 of the coating nozzle heads 3c, 3m, 3y, and 3k, and controls each spray nozzle 4 based on a control signal input from the spray nozzle control unit. . Each spray nozzle 4 is opened and closed by, for example, a piezo control system, and the spray nozzle control unit controls the opening and closing of each spray nozzle 4 to eject cyan, magenta, yellow, and black paints. It is possible to perform painting by full color printing corresponding to the color pattern by individually controlling the stop and stop.

  The conveyor 5 is disposed below the ink jet coater 2 and is formed of a roller conveyor 18 and a belt conveyor 19 as shown in FIGS. The roller conveyor 18 is disposed at a front position where the building board 1 of the ink jet coating machine 2 is introduced, and the belt conveyor 19 follows the roller conveyor 18 from the front position where the building board 1 of the ink jet coating machine 2 is introduced. In addition, it is disposed over a position directly below the ink jet type coating machine 2 and a rear position where the building board 1 of the ink jet type coating machine 2 is led out.

  The roller conveyor 18 is formed by arranging a large number of rollers 27 as shown in FIG. 3, and the rollers 27 are formed to extend over two rows of coating nozzle heads 3c, 3m, 3y, and 3k. Is. Each roller 27 is inclined such that one end is located on the front side and the other end is located on the rear side with respect to the direction in which the building board 1 is conveyed. Positioning pins 28 projecting upward from the roller 27 are provided upright at the end position on the inclined side and the central position in the longitudinal direction of the roller 27. The positioning pin 28 arranged at the center of the roller 27 is moved up and down so as to be retracted below the roller 27 when painting the wide building board 1. By inclining the roll 27 in this way, the building board 1 conveyed on the roller conveyor 18 will be sent while abutting the positioning pins 28 by the inclination of the roller 27, and in the width direction of the building board 1. Positioning can be performed.

  The belt conveyor 19 is provided in two rows corresponding to each of the two sets of coating nozzle heads 3c, 3m, 3y, and 3k. A plurality of positioning pins 29 projecting upward from the belt conveyor 19 are erected along the side portion of each belt conveyor 19 on the extended line of the alignment pins 28. The positioning pins 29 arranged between the adjacent belt conveyors 19 are moved up and down so as to be retracted below the belt conveyor 19 when painting the wide building board 1. In addition, a pusher 30 formed with a cylinder device or the like is provided on the upper side of the belt conveyor 19 at the side position opposite to the positioning pin 29 of each belt conveyor 19. Then, when the building board 1 is transported from the roller conveyor 18 onto the belt conveyor 19, the pusher 30 pushes one side end of the building board 1 to place the other side end of the building board 1 on the positioning pin 29. So that the building board 1 is positioned accurately in the width direction.

  Here, as shown in FIG. 1, the guide rail 6 is installed so as to cross the belt conveyor 19 of the transport conveyor 5 horizontally across the width direction (direction perpendicular to the transport direction). The guide rail 6 is formed in a gate shape by attaching a pair of parallel rails 22 between the upper ends of columns 21 erected on both sides of the belt conveyor 19. The length of the rail 22 is larger than the width of the belt conveyor 19 and larger than three times the length of the coating nozzle head 3 in the direction in which the spray nozzles 4 are arranged. Is a coating position zone 6a located immediately above the belt conveyor 19, and both end portions of the rail 22 that are laterally removed from the upper position of the conveyor belt 19 are standby zones 6b and 6c, respectively.

  A pair of sliders 23 is provided on the lower surface of the coating nozzle head 3, and the pair of sliders 23 is slidably fitted to the rails 22, so that the pair of sliders 23 is straddled across the pair of rails 22. The coating nozzle head 3 is attached. The spray nozzle 4 provided on the lower surface of the coating nozzle head 3 is located between the pair of rails 22. A pair of coating nozzle heads 3 are attached to the rail 22, and one of the pair of coating nozzle heads 3A is disposed in the coating position zone 6a of the rail 22, and the other coating nozzle head 3B is a standby zone 6b at both ends. 6c. The pair of coating nozzle heads 3A and 3B is the same. In the embodiment of FIG. 1, only one type of coating nozzle head 3 is illustrated among the four types of coating nozzle heads 3 of cyan, magenta, yellow, and black, but cyan, magenta, yellow, Each of the four types of black coating nozzle heads 3 is slidably attached to the guide rail 6 as in FIG. In FIG. 1, reference numeral 26 denotes a paint supply hose for supplying paint to the coating nozzle heads 3A and 3B.

  Therefore, when the surface of the ceramic building board 1 such as a cement board is coated with the coating apparatus formed as described above, the building board 1 is first introduced onto the roller conveyor 18 of the transport conveyor 5. The introduced building board 1 is positioned on the roller conveyor 18 as described above, further positioned on the belt conveyor 19 as described above, and then sent on the belt conveyor 19 to be sent to the ink jet coating machine 2. Passes under the coating nozzle heads 3c, 3m, 3y, and 3k. And while sending the building board 1 by the belt conveyor 19 in this way, the coating nozzle heads 3c, 3m, 3y, and 3k are sprayed and applied to the surface of the building board 1 by spraying paint on the surface of the building board 1. It is something that can be done. The building board 1 coated in this way is sent to the end portion of the belt conveyor 19 and carried out to the next process.

  When painting with the ink jet type coating machine 2 as described above, the coating nozzle head 3 is likely to become dirty due to mist generated when the paint is sprayed or rebound of the sprayed paint. It is necessary to clean and clean the head 3, and when a failure occurs such as the nozzle 4 of the coating nozzle head 3 being clogged, it is necessary to repair the coating nozzle head 3. Here, the painting nozzle head 3 used for painting is the painting nozzle head 3A located in the painting position zone 6a of the rail 22 of the guide rail 6 in the state of FIG. In the standby zone 6b, the coating nozzle head 3B in a good state after being cleaned and cleaned is waiting.

  When the coating nozzle head 3A used for painting is cleaned, cleaned or repaired, as shown in FIG. 1B, the coating nozzle head 3A is moved along the rail 22 from the coating position zone 6a to the end standby zone 6c. While sliding, the coating nozzle head 3B waiting in the standby zone 6b is moved along the rail 22 to the coating position zone 6a, and coating is performed by the coating nozzle head 3B positioned in the coating position zone 6a. In this way, the coating nozzle head 3A in a state of waiting in the standby zone 6c can be cleaned, cleaned, or repaired while the coating with the coating nozzle head 3B is continued. When cleaning / cleaning / repairing the coating nozzle head 3B used for painting in the state of FIG. 1B, the coating nozzle head 3B is moved from the coating position zone 6a to the standby zone 6b, The coating nozzle head 3A waiting in 6c is moved to the coating position zone 6a, returned to the state shown in FIG. 1 (a), and the coating nozzle head 3B is cleaned, cleaned or repaired while coating is continued with the coating nozzle head 3A. Can be performed.

  In this way, while one of the pair of coating nozzle heads 3A, 3B is moved to the standby zone 6b, 6c and is in a standby state for cleaning, cleaning or repair, the other is moved to the coating position zone 6a to continue the coating. It is possible to perform painting with high productivity without having to stop the line during cleaning, cleaning or repair. Further, only one guide rail 6 is required for the pair of painting nozzle heads 3A and 3B, and a large space for installing the guide rail 6 is not required. In particular, when four types of coating nozzle heads 3A and 3B of cyan, magenta, yellow, and black are used for full-color coating, only four guide rails 6 are required, and the conventional eight are required. The installation space cannot be secured. Further, since the pair of painting nozzle heads 3A and 3B is disposed in the same painting position zone 6a and performs painting, the painting plate head 3A and 3B can be painted at the same position on the building board 1. The control of the spraying of the paint can be performed with the same control. Therefore, the control of the coating spray of the coating nozzle head 3 is not complicated.

  FIG. 2 shows another embodiment of the present invention, in which a pair of coating nozzle heads 3A and 3B are connected by a connecting tool 24 and integrated. Since the coating nozzle heads 3A and 3B are connected in this way, they are slid along the rail 22 as a unit. In addition, stoppers 25 are provided in the standby zones 6 b and 6 c at both ends of the rail 22 of the guide rail 6.

  In this case, as shown in FIG. 2A, the coating nozzle head 3A is cleaned and the coating nozzle head 3A is positioned in the coating position zone 6a and the coating nozzle head 3B is positioned in the standby zone 6b. When the coating nozzle head 3A is slid from the coating position zone 6a to the standby zone 6c for cleaning or repair, the coating nozzle head 3B connected by the connector 24 is pulled as shown in FIG. And move from the standby zone 6b to the painting position zone 6a. When the coating nozzle head 3A moved to the standby zone 6c comes into contact with the stopper 25 and the coating nozzle head 3A is positioned at a predetermined position where the standby zone 6c is positioned, the coating position zone 6a is moved according to the movement of the coating nozzle head 3A. The distance between the coating nozzle heads 3A and 3B by the connector 24 is set so that the coating nozzle head 3B moving to the position is suitable for performing inkjet coating on the building board 1 conveyed by the conveyor 5. The position of the stopper 25 is set. Of course, as shown in FIG. 2B to FIG. 2A, the coating nozzle head 3B is slid from the coating position zone 6a to the standby zone 6b, and the coating nozzle head 3A is moved from the standby zone 6c to the coating position zone. When moving to 6a, when the coating nozzle head 3B moved to the standby zone 6b comes into contact with the stopper 25 and the coating nozzle head 3B is positioned at a predetermined position in the standby zone 6b, the coating nozzle head 3A Is positioned at a position suitable for ink-jet coating in the coating position zone 6a.

  Thus, when one of the pair of coating nozzle heads 3A and 3B is moved to the position where the standby zones 6b and 6c are positioned, the other is also suitable for automatically performing ink-jet coating in the coating position zone 6a. Therefore, it is not necessary to adjust the position of the coating nozzle heads 3A and 3B in the coating position zone 6a.

An example of an embodiment of the invention is shown, and (a) and (b) are perspective views, respectively. The other example of embodiment of this invention is shown, (a) (b) is a perspective view, respectively. It is a top view which shows the whole coating apparatus. It is a front view which shows the whole coating apparatus. It is a figure which shows schematic structure of an inkjet type coating machine. It is the bottom view to which the painting head was expanded. It is the expanded bottom view of a single-piece | unit head. It is a top view of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building board 2 Inkjet coating machine 3 Coating nozzle head 4 Injection nozzle 5 Conveyor 6 Guide rail

Claims (2)

  It is a building board coating device that paints the surface of a building board by injecting paint from the coating nozzle head of an ink jet coating machine placed above the conveyor while feeding the building board on the conveyor. In addition, a guide rail that crosses over the transport conveyor is provided, and the portion of the guide rail that is located immediately above the transport conveyor is formed as a coating position zone, and both end portions that are laterally removed from the position immediately above the transport conveyor are formed as standby zones. A building board painting apparatus comprising a pair of painting nozzle heads mounted on a guide rail so as to be movable between a painting position zone and a standby zone. A pair of coating nozzle heads are connected so that both coating nozzle heads move integrally along the guide rail. When one coating nozzle head is moved to the standby zone, the other coating nozzle head paints. 2. The building board according to claim 1, wherein when the other coating nozzle head is moved to the standby zone, the one coating nozzle head is positioned in the coating position zone. Painting equipment.

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