JP6500656B2 - Installation jig for air spray device, installation method of air spray device - Google Patents

Description

  The present invention relates to an installation jig and an installation method of an air spraying apparatus that sprays air.

  An offset sheet-fed printing press 100 as shown in FIG. 8 is known for printing on sheet-like sheets. The offset sheet-fed printing press 100 includes a paper feed unit 110, a printing unit 120, a paper discharge unit 130, and the like.

  The sheet feeding unit 110 conveys the sheets stored in the sheet feeding pile 111 to the printing unit 120 one by one. In the printing unit 120, printing with the ink of the corresponding color is performed in each of the plurality of printing units 120a. When printing in the printing unit 120 is finished, the sheet is discharged to the paper discharge unit 130 by a conveyor or the like and stacked on the paper discharge pile 131.

  The printing units 120a described above are provided with rolls such as an impression cylinder 3, a plate cylinder 7, a blanket cylinder 8, a transfer cylinder 9, an ink supply device (not shown) that supplies ink, and the like. A printing plate is wound on the printing cylinder 7, and the ink transferred to the printing plate by the ink supply device is transferred to the blanket cylinder 8, and the ink is transferred to the sheet traveling between the impression cylinder 3 and the blanket cylinder 8. Printing on the paper is performed. The transfer cylinder 9 is for carrying a sheet between the printing units 120 a and the like.

  In such an offset sheet-fed printing press 100, a print pattern of a sheet is inspected inline. This inspection is performed based on an image taken by illuminating the sheet conveyed along the impression cylinder 3 with an illumination device (not shown) and photographing with the camera 5.

  The impression cylinder 3 rotates in a state where the leading edge of the sheet is covered with a gripping claw or the like, thereby conveying the sheet, but the behavior is unstable because the trailing end of the sheet is not restrained. The image taken by the camera 5 may be distorted and contribute to inspection errors. Therefore, in order to stabilize the behavior of the sheet and suppress the fluttering, air is blown to the sheet from the air blowing device 6 to press the sheet non-contactingly on the impression cylinder 3 (for example, Patent Document 1, 2nd grade).

JP, 2013-107296, A JP, 2006-1079, A

  The air spraying device 6 stabilizes the behavior of the sheet being conveyed and suppresses the fluttering by spraying the air onto the sheet, but in order to stabilize the behavior of the sheet in the vicinity of the imaging position on the impression cylinder 3, the air relative to the imaging position The position of the spraying device 6 and the blowing direction of the air are important, and the installation thereof needs to be performed accurately.

  Conventionally, the installation work of the air spraying device 6 has been performed by measuring the position using a scale or a level, or visually checking the spraying position of air from the air spraying device 6. However, in such a method, the installation time is long, and it is not easy to accurately install the air spraying device 6.

  The present invention has been made in view of the above problems, and it is an object of the present invention to provide an installation jig or the like of an air spraying apparatus which enables the air spraying apparatus to be installed accurately for a short time.

  According to a first aspect of the present invention, there is provided an installation jig for installing an air spraying apparatus for blowing air onto a sheet-like object conveyed by a roll when the object is photographed with a camera. And a holding portion for holding the air blowing device, a direction indication portion indicating a blowing direction of air from the air blowing device, and a mounting portion for mounting on the roll. It is an installation jig of the air spraying apparatus characterized by the above.

It is desirable that the installation jig for the air spraying apparatus according to the first invention comprises a mark for photographing with the camera when adjusting the position of the installation jig.
Preferably, the camera is a line camera, and the mark includes oblique portions which are inclined with respect to the rotation direction of the roll and intersect each other.
Preferably, the mark includes a line segment extending from one of the intersections of the hatched portions to one side of the rotational direction.

It is preferable that the installation jig has an arc-shaped curved surface, and the attaching portion be provided at an end of the curved surface and have a hook shape.
Furthermore, the holding portion is a recess provided on the upper surface of the installation jig, and the upper surface functions as the direction instructing unit, and the direction of the upper surface indicates the blowing direction of air from the air spraying device. Is desirable.
In addition, it is desirable that the installation jig be a 3D printer.

  A second invention is an installation method for installing an air spraying apparatus for spraying air onto the target when the sheet-like target transported by a roll is photographed by a camera, and the air spraying apparatus is held Using an installation jig for the air spraying apparatus, which comprises a holding unit for setting the air blowing device, a direction indication unit for indicating the blowing direction of the air from the air spraying device, and a mounting unit for mounting on the roll The installation jig is attached to the roll by the attachment portion, and the air blowing device is held by the holding portion so that the blowout direction of air is aligned with the direction instructing portion, and then the installation jig is mounted on the roll. It is an installation method of the air spraying apparatus characterized by removing from.

  By attaching the installation jig of the present invention to the roll and using it for the installation of the air spraying device, positioning of the air spraying device and the blowing direction of the air can be performed easily and accurately, and it is shorter and more accurate than before. It is possible to install an air spray device on the In the present invention, the position adjustment marks can facilitate the position adjustment of the installation jig by the rotation of the roll. For example, by using the mark by the above-described oblique line or the like, the size and direction of the deviation of the installation jig from the target position can be easily determined from the photographed image of the mark by the line camera for inspection of the printed pattern. Adjustment work becomes easy.

  In addition, by providing an arc-shaped curved surface in the installation jig and providing a hook-like attachment portion at the end, the installation jig can be easily attached along the roll. Furthermore, by providing a recess for disposing and holding the air spraying device on the upper surface of the installation jig and setting the direction of the upper surface to the correct air blowing direction, the air blowing device and the air blowing direction can be easily made. Positioning is possible.

  By creating such an installation jig with a 3D printer, it is possible to flexibly change the installation position of the air spray device due to differences in equipment conditions such as roll diameter, camera position, optical conditions, etc. It is possible to cope with these conditions, and by preparing the installation jig in accordance with these conditions, it is possible to install the air spraying apparatus at an arbitrary position for a short time and accurately in various printing machines and the like.

  According to the present invention, it is possible to provide an installation jig or the like of the air spraying device which enables the air spraying device to be installed accurately in a short time.

The figure which shows the air spraying apparatus 6 A diagram showing the installation jig 10 Diagram showing the position adjustment mark 20 Flow chart showing the installation method of the air spraying device 6 A diagram for explaining the installation method of the air spraying device 6 The figure which shows the picked-up image 50 of the mark 20 for position adjustment A diagram showing the position adjustment mark 20a Figure showing an offset sheet-fed printing press 100

  Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

(1. Air spraying device 6)
FIG. 1 is a view showing an air spraying device 6 installed using an installation jig according to an embodiment of the present invention. As described above, in the present embodiment, the sheet-like sheet 2 (target object) conveyed along the impression cylinder 3 of the offset sheet-fed printing press 100 (see FIG. 8) is photographed by the camera 5, and the image is used. The printed pattern printed on the paper 2 is inspected. There are no particular limitations on the material of the sheet 2, the print pattern, and the like.

  The impression cylinder 3 conveys the sheet 2 by rotating in the direction indicated by the arrow A in a state where the leading end of the sheet 2 is held by the holding claws 31. The impression cylinder 3 is provided with a recess 30 for the disposition of the claw 31 and the like. Hereinafter, rotating the impression cylinder 3 in the direction indicated by the arrow A may be called forward rotation, and rotating the impression cylinder 3 in the reverse direction may be called reverse rotation. Further, the directions of the forward rotation and the reverse rotation are referred to as the rotational direction of the impression cylinder 3.

  The camera 5 shoots the sheet 2 conveyed along the impression cylinder 3, and in the present embodiment, a line camera is used. The line camera has a plurality of light receiving elements arranged in a line with a lens such as a condenser lens, and the arrangement direction of the light receiving elements is the rotational axis direction of the impression cylinder 3 (corresponding to the normal direction of the drawing sheet of FIG. 1) It is arranged according to. 5 'of the figure shows the optical axis of the camera 5 (the optical axis of the lens).

  The air spraying device 6 is a tubular air nozzle which blows air 6 ′ onto the sheet 2 when the sheet 5 is photographed by the camera 5, whereby the sheet 2 is pressed onto the impression cylinder 3 in a noncontact manner to stabilize its behavior. A hole 61 is provided on the tube side of the air nozzle, and compressed air from a factory or the like is used to blow air 6 'from the hole 61. The installation position of the air spraying device 6 and the blowing direction of the air 6 '(the direction of the hole 61) are determined so that the sheet 2 can be suitably pressed near the photographing position of the sheet 2 on the impression cylinder 3.

(2. Installation jig 10 for the air spraying device 6)
In the present embodiment, at the time of installation of the air spraying device 6, an installation jig 10 (hereinafter sometimes referred to as a jig 10) shown in FIG.

  The jig 10 can correctly position the blowing direction of the air spraying device 6 or the air 6 'according to the device conditions of the offset sheet-fed printing press 100 such as the diameter of the impression cylinder 3, the position of the camera 5, optical conditions, etc. Designed and created by a 3D printer. The material of the jig 10 is not particularly limited as long as it can be used as a model material in a 3D printer. For example, various resins used as a model material can be used as the material.

  The jig 10 has a substantially inverted triangular plate-like main body 11. One side surface 11 a of the main body 11 is an arc-shaped curved surface, and the curvature thereof is matched to the curvature of the outer peripheral surface of the impression cylinder 3. Further, since the hole 11 b is provided in the central portion of the main body 11, the amount of the model material can be reduced because it is easy to hold.

  A substantially semicircular recess 13 is provided on the upper surface 15 of the main body 11. The recess 13 is a holding portion for arranging and holding the air spraying device 6, and the size of the recess 13 is matched to the diameter of the air spraying device 6.

  At an upper end portion of the side surface 11 a of the main body 11, a mounting portion 19 which protrudes above the upper surface 15 is provided. The mounting portion 19 is bent in a hook shape, and the jig 10 is mounted on the pressure drum 3 by hooking the mounting portion 19 on the front wall portion 32 (see FIG. 1) of the depression 30 of the pressure drum 3 described above. Can be attached to

  Position adjustment marks 20 for adjusting the position of the jig 10 by the rotation of the impression cylinder 3 and aligning it with the target position are provided on the back surface 17 on the opposite side to the bending direction of the mounting portion 19.

(3. Alignment mark 20)
FIG. 3 is a view showing the details of the position adjustment mark 20 described above. The vertical direction in FIG. 3 corresponds to the rotation direction of the impression cylinder 3, the lower part is the positive rotation side of the impression cylinder 3, and the upper part is the reverse rotation side of the impression cylinder 3. The left and right direction in FIG. 3 corresponds to the rotational axis direction of the impression cylinder 3.

  As shown in FIG. 3, the position adjustment mark 20 is inclined with respect to the rotational direction of the impression cylinder 3, and passes through the intersection of two diagonal lines 201a and 201b (hatched area) intersecting with each other and the diagonal lines 201a and 201b. And a line extending from one of the intersections of the oblique lines 201a and 201b to one side in the rotational direction of the impression cylinder 3 (the opposite rotation side of the impression cylinder 3). And one-sided line 203.

(4. Installation method of air spraying device 6)
Next, with reference to FIG. 4 etc., the installation method of the air spraying apparatus 6 using the installation jig 10 is demonstrated. FIG. 4 is a flowchart showing the method of installing the air spraying device 6.

  In the present embodiment, first, the installation jig 10 for the air spraying device 6 is attached to the impression cylinder 3 (S1). FIG. 5A is a view showing a state where the jig 10 is attached to the impression cylinder 3. In the present embodiment, hooking the hook-like attachment 19 to the front wall 32 of the recess 30 of the impression cylinder 3 is performed. Then, the jig 10 can be attached along the outer peripheral surface of the impression cylinder 3. The impression cylinder 3 is rotated as necessary, and the position adjustment is performed to some extent so that the camera 5 can shoot the position adjustment mark 20.

  Next, in a state where the impression cylinder 3 is at rest, the camera 5 shoots the position adjustment mark 20 of the jig 10 (S2).

  FIG. 6 is a view showing imaging of the position adjustment mark 20. As shown in FIG. In the present embodiment, a line camera is used as the camera 5, and an image in a predetermined range is obtained by continuously photographing the sheet 2 being conveyed at the time of inspection of a print pattern.

  Therefore, when the position adjustment mark 20 shown in FIG. 6A is continuously photographed with a line camera while the impression cylinder 3 is at rest, for example, the optical axis 5 'of the camera 5 is a dotted line 51- of FIG. When it is at a position overlapping the reference line 202 as indicated by 1, as a result of continuing photographing the reference line 202, the photographed image 50 is substantially filled with the color (for example, black) of the reference line 202 as shown in FIG. Dark image (S3; YES).

  In this embodiment, when the reference line 202 coincides with the optical axis 5 'of the camera 5 and the photographed image 50 is in the state shown in FIG. 6B, it is assumed that the jig 10 is at the correct position (target position). Do. This state is shown in FIG. 5 (b).

  The position of the recess 13 at this time corresponds to the installation position of the air spraying device 6 shown in FIG. 1, and the direction of the upper surface 15 corresponds to the blowing direction of the air 6 ′ from the air spraying device 6. It is designed. That is, the upper surface 15 functions as a direction indicating unit that indicates the blowing direction of the air 6 '.

  Thereafter, as shown in FIG. 5C, the air spraying device 6 is disposed and held in the recess 15 of the jig 10, and the direction of the holes 61 (the blowing direction of the air 6 ') is aligned with the direction of the upper surface 15 S4).

  Then, the air spraying device 6 is fixed to the frame or the like of the offset sheet-fed printing press 100 by a bracket (not shown) or the like (S5), and the jig 10 is removed from the impression cylinder 3 (S6). For removing the jig 10, for example, only the impression cylinder 3 is rotated forward so that the depression 30 comes to the position of the jig 10 from the state shown in FIG. 5C, and then the jig 10 is moved to the depression 30 side. You can remove it by sliding it.

  On the other hand, at the time of photographing of the position adjustment mark 20 in S2, the optical axis 5 'of the camera 5 is shifted from the reference line 202 of the position adjustment mark 20 to the reverse rotation side of the impression cylinder 3, dotted line in FIG. When the camera is at the position indicated by 51-2, the camera 5 continues to image predetermined areas of the oblique lines 201a and 201b and the one-sided line 203. As a result, as shown in FIG. Three lines will appear (S3; NO, S7; three).

  In this case, the operator assumes that the jig 10 is shifted from the target position to the positive rotation side of the impression cylinder 3, and reversely rotates the impression cylinder 3 to perform fine adjustment (S8). Thereafter, in a state where the impression cylinder 3 stands still, the camera 5 shoots the position adjustment mark 20 again (S2).

  At this time, it is assumed that the jig 10 approaches the target position, and the optical axis 5 'of the camera 5 comes to the position indicated by the dotted line 51-3 in FIG. In this case, as shown in FIG. 6 (d), similarly to the above, the photographed image 50 is bright overall and three lines appear (S3; NO, S7; three lines), but the distance between the lines at both ends narrows. .

  By this interval, the operator can grasp how far the jig 10 approaches the target position. Thereafter, the operator reversely rotates the impression cylinder 3 again (S8), and the jig 10 is made to flow closer to the target position.

  On the other hand, when the jig 10 exceeds the target position on the reverse rotation side of the impression cylinder 3, the optical axis 5 'of the camera 5 has the position adjustment mark 20 as indicated by the dotted line 51-4 in FIG. The reference line 202 is displaced to the positive rotation side of the impression cylinder 3. In this case, as a result of continuing photographing of predetermined portions of the oblique lines 201a and 201b with the camera 5, as shown in FIG. 6D, the photographed image 50 is generally bright but two lines appear (S3; NO, S7; 2).

  In this case, the operator assumes that the jig 10 is shifted from the target position to the reverse rotation side of the impression cylinder 3 and rotates the impression cylinder 3 forward to perform fine adjustment (S9). It becomes a flow close to the target position.

  In this manner, the operator rotates the impression cylinder 3 forward or backward while referring to the photographed image 50 to set the jig 10 at the target position. The amount and direction of the displacement of the jig 10 can be easily determined by the interval between the lines displayed in the photographed image 50 and the number as described above, and the position adjustment of the jig 10 is easy.

  As described above, according to the present embodiment, by attaching the jig 10 to the impression cylinder 3 and using it for the installation of the air blowing device 6, the positioning of the air blowing device 6 and the air 6 'in the blowing direction can be simplified and It can be performed with high accuracy, and the air spraying device 6 can be installed in a shorter time and more accurately than in the past. For example, regarding the working time, the installation work, which conventionally took about 1.5 hours, can be reduced to about 0.5 hours.

  Further, the jig 10 can easily perform the position adjustment by the rotation of the impression cylinder 3 by the position adjustment mark 20. Since the size and direction of deviation of the jig 10 from the target position can be easily found from the photographed image 50 by the line camera by the configuration of the position adjustment mark 20 including the oblique lines 201a, 201b, etc. Becomes easier.

  Further, the side surface 11a of the jig 10 is a curved surface in an arc shape, and by providing a hook-like mounting portion 19 at its end, the mounting portion 19 is hooked on the front wall portion 32 of the depression 30 of the impression cylinder 3 The tool 10 can be easily attached along the impression cylinder 3.

  Further, the upper surface 15 of the jig 10 is provided with a recess 13 for disposing and holding the air spraying device 6, and the direction of the upper surface 15 corresponds to the correct blowing direction of the air 6 '. The blowing direction of 6 'can be easily positioned.

  Further, since the jig 10 is created by a 3D printer using a model material, installation of the air spraying device 6 according to differences in apparatus conditions such as the diameter of the impression cylinder 3 such as the printing machine or the position of the camera 5, optical conditions, etc. It is possible to flexibly cope with the difference in position and the like, and by preparing the jig 10 according to these conditions, the air spraying device 6 can be installed in any position in a short time and accurately in various printing machines etc. .

  However, the present invention is not limited to this. For example, in the present embodiment, the paper 2 conveyed along the impression cylinder 3 is photographed and the printed pattern is inspected. Therefore, the air spraying device 6 is installed in the vicinity of the impression cylinder 3. There is nothing to do. For example, the paper 2 in the middle of being conveyed by another roll such as the transfer cylinder 9 may be photographed and inspected. The air spraying device 6 can also be arranged in the vicinity of the various rolls according to the method of the invention.

  Further, in the present embodiment, the jig 10 is created by a 3D printer, but may be created by other methods, and the material is not limited to a model material such as resin.

  Furthermore, although the example of the offset sheet-fed printing press 100 has been described in the present embodiment, the present invention is not limited thereto, and a sheet-like target is transported by a roll and a printing machine etc. It is applicable if it is an apparatus.

  Further, the position adjustment marks 20 are not limited to those described with reference to FIG. For example, with respect to the position adjustment mark 20 described in FIG. 3, as shown in FIG. 7, it is on one side of the rotational direction of the impression cylinder 3 from the intersection of oblique lines 201 a and 201 b (the reverse rotation side of the impression cylinder 3 in the example of FIG. With respect to the portion, it is also possible to change between filling the hatched lines 201a and 201b to form a triangular mark or omitting the reference line 202.

  For example, when the jig 10 is at the target position and the optical axis 5 'of the camera 5 is at the position indicated by the dotted line 51-5, one is on the photographed image 50 in order to continue photographing the intersection of the oblique lines 201a and 201b. The line of appears. On the other hand, when the jig 10 is shifted to the positive rotation side of the impression cylinder 3 with respect to the target position and the optical axis 5 'of the camera 5 is at the position shown by the dotted line 51-6, the captured image 50 has the above shift. It becomes an image in which the width corresponding to the size is filled.

  Alternatively, in the case where the position adjustment of the jig 10 is performed by rotating the impression cylinder 3 to a predetermined rotation angle while referring to the rotation angle of the impression cylinder 3 measured by an encoder or the like, the position adjustment mark 20 It is also possible to omit

  Further, the specific shape of the jig 10 is not limited to that described in FIG. 2 or the like, as long as it can be attached to the roll of the impression cylinder 3 or the like and positioning of the air blowing device 6 and air 6 'in the blowing direction is possible. . For example, it is possible to use a hole for passing the air spraying device 6 instead of the depression 13 or to indicate the blowing direction of the air 6 ′ by a mark formed on the main body 11.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is apparent that those skilled in the art can conceive of various modifications or alterations within the scope of the technical idea disclosed in the present application, and of course these also fall within the technical scope of the present invention. It is understood.

2; sheet 3; impression cylinder 5; camera 5 '; optical axis 6; air spraying device 6'; air 7; plate cylinder 8; blanket cylinder 9; transfer cylinder 10; installation jig 11; main body 11a; side surface 11b; Hole 13; hollow 15; upper surface 17; rear surface 19; mounting portion 20; position adjustment marks 201a, 201b; hatched line 202; reference line 203; single-sided wire 30; hollow 31; Offset sheet-fed printing press 110; paper feed unit 120; printing unit 120a; printing unit 130; paper discharge unit

Claims (8)

An installation jig for installing an air spraying apparatus for blowing air onto an object when the sheet-like object transported by a roll is photographed by a camera,
A holding unit for holding the air spraying device;
A direction indicating unit indicating a blowing direction of air from the air spraying device;
A mounting portion for mounting on the roll;
An installation jig for an air spraying apparatus, comprising:   The installation jig for the air spraying apparatus according to claim 1, further comprising a mark for photographing with the camera when adjusting the position of the installation jig. The camera is a line camera,
The installation jig of the air spraying apparatus according to claim 2, wherein the mark includes oblique portions which are inclined with respect to the rotation direction of the roll and intersect each other.   The installation jig for an air spraying apparatus according to claim 3, wherein the mark includes a line segment extending from one of the intersections of the hatched portions to one side in the rotational direction. The installation jig has an arc-shaped curved surface,
The installation jig for the air spraying apparatus according to any one of claims 1 to 4, wherein the mounting portion is provided at an end of the curved surface and has a hook shape. The holding portion is a recess provided on the upper surface of the installation jig,
The air spraying device according to any one of claims 1 to 5, wherein the upper surface functions as the direction indication portion, and the direction of the upper surface indicates the blowing direction of air from the air spraying device. Installation jig.   The installation jig for the air spraying apparatus according to any one of claims 1 to 6, wherein the installation jig is a 3D printer. It is an installation method for installing an air spraying apparatus which sprays air on the object when shooting a sheet-like object transported by a roll with a camera,
An air spraying apparatus comprising: a holding portion for holding the air spraying device; a direction indication portion indicating a blowing direction of air from the air spraying device; and a mounting portion for mounting on the roll. Use the installation jig,
The mounting jig is attached to the roll by the mounting portion, and the air blowing device is held by the holding portion so that the blowout direction of air is matched with the direction indication portion, and then the mounting jig is mounted from the roll The installation method of the air spraying apparatus characterized by removing.

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