JP2004322372A - Device and method for position adjustment of matter to be printed in screen printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively set a reference position of a matter to be printed in a screen printing machine. <P>SOLUTION: A printing mechanism having a first screen plate at a printing part 2 prints a matter to be printed for the first plate with its position temporarily determined by a conforming part 1. Then, a printing mechanism having a second screen plate at the printing part 2 prints a matter 30a to be printed for adjustment with its position temporarily determined by the conforming part 1. A CCD camera 25 in the printing part detects a sign position printed on the matter 30a to be printed for adjustment. Then, the matter to be printed for the first plate with the sign printed is supplied again to the conforming part 1 as a matter to be printed for the second plate in order for the CCD camera in the conforming part to detect the sign position of the matter to be printed for the second plate. On the basis of a comparison result between a reference detected value concerning the position of the matter 30a to be printed for adjustment detected by the CCD camera 25 in the printing part and an actual detected value concerning the position of the matter to be printed for the second plate detected by the CCD camera in the conforming part, the positioning mechanism of the conforming part 1 is driven to adjust the main position of the matter to be printed for the second plate supplied to the conforming part 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a screen printing machine, for example, in the case where the first printing is performed on the same printing material and then the second printing is continuously performed, the position of the printing material supplied from the alignment unit to the printing unit is aligned. The present invention relates to a device and a method for pre-adjusting in a section.
[0002]
[Prior art]
For example, in Patent Literature 1 below, a CCD camera is installed in a matching unit. Generally, in a conventional screen printing machine, the position of a printing medium is adjusted using the CCD camera of the matching unit in the following procedure.
[0003]
In the aligning section, the first printing material is provisionally positioned at a preset position. The temporarily positioned first printing material is transported from the alignment unit to the printing unit, and the first printing material is printed by the first screen plate. At this time, a mark is also printed on the first printing material.
[0004]
Next, after replacing the first screen printing plate with the second screen printing plate, the printing medium for adjustment is provisionally positioned at a preset position in the alignment section. The temporarily positioned adjustment printing material is transported from the alignment unit to the printing unit, and the adjustment printing material is printed by the second screen plate. At this time, a mark is also printed on the adjustment print substrate. The printed printing medium for adjustment is returned from the printing unit to the alignment unit. In the matching unit, the CCD camera detects the mark of the adjustment print medium, and stores the reference position of the adjustment print medium. Thereafter, the printing medium for adjustment is discharged from the alignment unit via the printing unit.
[0005]
Next, the first printing material on which the first printing has been performed is sequentially supplied to the matching unit as a second printing material. In the aligning unit, the CCD camera detects a mark of the second printing substrate temporarily positioned as in the first printing, and stores the actual position of the second printing substrate. Based on the result of the comparison between the actual position and the reference position of the printing medium for adjustment, the printing medium for the second plate provisionally positioned by the matching unit is adjusted in position and is finally positioned. After that, the second printing is continuously performed while performing the actual positioning.
[0006]
[Patent Document 1]
Japanese Patent Application Laid-Open No. H10-76631
[Problems to be solved by the invention]
As described above, conventionally, it is necessary to return the printed adjustment printing material from the printing unit to the matching unit, and then detect the mark of the adjustment printing material by the CCD camera in the matching unit. Therefore, setting the reference position of the printing medium for adjustment is troublesome.
[0008]
SUMMARY OF THE INVENTION It is an object of the present invention to efficiently set a reference position of a printing medium in a screen printing machine.
[0009]
Means for Solving the Problems and Effects of the Invention
The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 6) of the following embodiments.
According to a first aspect of the present invention, there is provided a printing medium position adjusting device for a screen printing machine, which is configured as follows.
[0010]
In this screen printing machine, an alignment section (1) for adjusting the position of the supplied printing material (30a, 30) by a positioning mechanism (4), and a transport mechanism (16) from the alignment section (1). And a printing unit (2) for positioning the printing material (30a, 30) supplied by the printer and printing the printing material (30a, 30) by the printing mechanism (11). The apparatus for adjusting the position of a printed material of the screen printing machine includes a matching portion position detecting means (24, 26) for detecting a position of the printing material (30) supplied to the matching portion (1); And a printing unit position detecting means (25, 26) for detecting the position of the printing material (30a) supplied to the printer.
[0011]
According to the first aspect of the present invention, not only the matching section position detecting means (24, 26) but also the printing section position detecting means (25, 26) are provided, so that the printing section position detecting means (25, 26) can be effectively used. The matching portion position detecting means (24, 26) can be set by utilizing this. Therefore, it is not necessary to return the printing medium from the printing unit to the matching unit as in the related art and to detect the mark of the printing medium, and it is possible to efficiently set the reference position of the printing medium (30).
[0012]
The invention according to claim 2 is configured as follows on the premise of the invention according to claim 1.
The printing medium position adjusting device of the screen printing machine includes a reference detection value relating to a position of the printing medium (30a) detected by the printing section position detection means (25, 26) and the matching section position detection means (24, 26). ), A comparison means (26) for comparing the actual detection value with respect to the position of the printing medium (30) detected by the comparison means (26), and a comparison between the reference detection value and the actual detection value by the comparison means (26). Drive control means for driving the positioning mechanism (4) of the matching section (1) based on the result of comparison between the printing section (1) and the actual detection value to adjust the position of the printing medium (30) supplied to the matching section (1). (26).
[0013]
According to the second aspect of the present invention, the reference position of the print substrate (30) can be automatically set.
The invention of claim 3 is configured as follows on the premise of the invention of claim 1 or 2.
[0014]
The alignment section (1) includes an alignment table (3) on which the print substrates (30a, 30) are placed and positioned by the positioning mechanism (4). The printing section (2) includes a printing table (9) for placing and positioning the prints (30a, 30). The transport mechanism (16) reciprocates between the aligning table (3) and the printing table (9) to transfer the printing material (30a, 30) from the aligning table (3) to the printing table (9). A printed matter attaching / detaching section (20) is provided.
[0015]
According to the third aspect of the present invention, the alignment table (3) and the printing table (9) are set at predetermined positions in the alignment section (1) and the printing section (2), and do not move in the transport direction (X). Since the printing object (30a, 30) is transported between the table (3) and the printing table (9) by the printing material attaching / detaching portion (20) of the transport mechanism (16), the printing objects (30a, 30) are aligned. The substrate (3) can be smoothly transported from the table (3) to the printing table (9), and the printing substrate (30a, 30) can be accurately positioned by the alignment table (3) and the printing table (9).
[0016]
The method for adjusting the position of a printing medium of a screen printing machine according to the invention of claim 4 is configured as follows.
The provisional position of the first printing material (30) supplied in the aligning section (1) is positioned by the positioning mechanism (4), and from the aligning section (1) to the printing section (2) by the transport mechanism (16). The supplied printing material for first plate (30) is positioned, and printing is performed on the printing material for first plate (30) by the printing mechanism (11) having the first screen plate (13).
[0017]
Next, the provisional position of the printing medium (30a) supplied in the alignment section (1) is positioned by the positioning mechanism (4), and the transport mechanism (16) is transferred from the alignment section (1) to the printing section (2). After the adjustment printing substrate (30a) supplied by the printer is positioned and printed by the printing mechanism (11) having the second screen plate (13), the printing substrate for adjustment (30a) is printed. The position of the mark (33) printed on the printing substrate (30a) is detected by the printing unit position detecting means (25, 26).
[0018]
Next, the first plate printing material (30) on which the mark (33) is printed is supplied again to the alignment unit (1) as a second plate printing material (30), and the second plate printing material (30) is supplied. 30) The position of the mark (33) is detected by the matching portion position detecting means (24, 26).
[0019]
A reference detection value relating to the position of the printing medium for adjustment (30a) detected by the printing section position detection means (25, 26); and the second plate detected by the matching section position detection means (24, 26). An actual detection value relating to the position of the printing substrate (30) is compared, and a positioning mechanism (4) of the alignment unit (1) is driven based on the comparison result between the reference detection value and the actual detection value, and this alignment is performed. The book position of the second printing material (30) supplied to the unit (1) is adjusted.
[0020]
According to the fourth aspect of the present invention, there is no need to return the print from the printing section to the matching section and detect the mark of the print as in the prior art, so that the reference position of the print (30) is set efficiently. be able to.
[0021]
The fifth invention is configured as follows on the premise of the third invention.
The matching portion position detecting means (24, 26) includes a CCD camera (24) for picking up an image of a mark (33) on the printing medium (30). The printing unit position detecting means (25, 26) includes a CCD camera (25) for picking up an image of a mark (33) on the printing medium (30a). The CCD camera (25) of the printing unit (2) has a detectable position (P) entering the upper area (A) of the printing table (9) and a non-detection position (Q) retracting from the upper area (A). And can be taken.
[0022]
In the fifth aspect, the CCD camera (25) does not hinder the printing operation in the printing section (2).
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a screen printing machine according to an embodiment of the present invention will be described with reference to the drawings.
[0024]
In the screen printing machine schematically shown in FIGS. 4 to 6, a matching unit 1 and a printing unit 2 are provided side by side.
In the alignment section 1, an alignment table 3 is supported on a positioning mechanism 4.
[0025]
In the alignment table 3, a carry-in belt 6 that is continuous from the supply unit 5 on which the print materials 30 are stacked is disposed on the mounting surface 7, and the print material 30 is supplied from the supply unit 5 by the carry belt 6. 7 and moves on the mounting surface 7 in the transport direction X (horizontal direction). The front end 31 of the printing material 30 abuts against the stoppers 8 in the upward movement position on the mounting surface 7 to prevent the movement of the printing material 30 in the transport direction X, and to prevent the movement of the printing material 30 at both left and right ends 32. Is pushed in the width direction Y (horizontal direction orthogonal to the transport direction X) by the width shift plate (not shown), and the print substrate 30 stops at the initial setting position on the mounting surface 7. The mounting surface 7 is provided with a suction surface 7a by air suction adjacent to each stopper 8, and the printing material 30 is held at the initial setting position on the alignment table 3 by the suction surface 7a.
[0026]
As the positioning mechanism 4, for example, a conventionally known mechanism disclosed in JP-A-2001-121672 is employed. Although not shown, in the positioning mechanism 4, the rotary table is rotated about a vertical axis by a servomotor, and the movable table is moved in parallel in the transport direction X by the servomotor on the rotary table. , So as to translate in the width direction Y. Accordingly, the positioning mechanism 4 moves the alignment table 3 in the transport direction X and the width direction Y, and rotates in the θ direction on a horizontal plane including these directions X and Y. The printing substrate 30 held on the alignment table 3 moves together with the alignment table 3 to adjust the position.
[0027]
In the printing unit 2, a printing table 9 is supported so as to be able to move up and down in the vertical direction Z. On the printing table 9, a suction surface 10 is provided by air suction. It is supported so as to be able to move up and down in the direction Z. In the printing mechanism 11, a screen plate 13 is attached below the lifting frame 12, and the squeegee 14 and the doctor 15 are supported by the lifting frame 12 above the screen plate 13 so as to be movable in the transport direction X. And is movably supported in the vertical direction Z.
[0028]
In the printing medium transport mechanism 16, movable supports 17, 18 are installed between rails 19 on both sides in the width direction Y and are disposed at regular intervals on both sides in the transport direction X. A supply clamp 20 and a discharge clamp 21 (a print material attaching / detaching portion) that can be opened and closed are attached to both sides in the width direction Y. When the movable supports 17 and 18 are reciprocated between the aligning section 1 and the printing section 2 along the rails 19 by a driving mechanism (not shown), the supply clamp 20 and the discharge clamp 21 are moved as shown in FIG. 5 and a moving state shown in FIG. During the reciprocating movement, the printing table 9 moves up and down to allow the supply clamp 20 to pass. In the moving state shown in FIG. 5, both supply clamps 20 on the movable support table 17 are located on the alignment table 3, and both discharge clamps 21 on the movable support table 18 are located on the printing table 9. In the moving state shown in FIG. 6, both supply clamps 20 on the movable support table 17 are located on the printing table 9, and both discharge clamps 21 on the movable support table 18 are located on the discharge section 22.
[0029]
In the transport mechanism 16 in the moving state shown in FIG. 5, both the supply clamps 20 are closed by the alignment table 3, the front end 31 of the printing material 30 is gripped, the stoppers 8 move down, and the printing material by the suction surface 7a is moved. 30 is released. In the transport mechanism 16 in the moving state of FIG. 6, the printing material 30 is transported from the alignment table 3 to the printing table 9 by the two supply clamps 20, and the front end 31 of the printing material 30 is The contact of the printing substrate 30 in the transport direction X is prevented, and the printing substrate 30 is held on the printing table 9 by the suction surface 10. In the printing mechanism 11, when the elevating frame 12 is lowered, the screen plate 13 comes into contact with the printing material 30 on the printing table 9, and the squeegee 14 and the doctor 15 function on the screen printing plate 13, so that the printing material 30 Printing is performed. After printing, the lifting frame 12 moves up.
[0030]
In the transport mechanism 16 in the moving state of FIG. 5, both the discharge clamps 21 are closed by the printing table 9 to grip the front end 31 of the printing material 30, each stopper 23 moves down, and 30 is released. In the transport mechanism 16 in the moving state of FIG. 6, the print substrate 30 is transported from the printing table 9 to the discharge unit 22 by the two discharge clamps 21 and discharged.
[0031]
In the matching section 1, CCD cameras 24 (matching section position detecting means) are provided on both sides in the width direction Y above the suction surface 7a of the matching table 3. In the discharge section 22, CCD cameras 25 (printing section position detecting means) are provided on both sides in the width direction Y. The two CCD cameras 25 can take a detectable position P entering the upper area A of the printing table 9 and a non-detecting position Q retracting from the upper area A to the discharge unit 22 by a reciprocating mechanism (not shown). . These CCD cameras 24 and 25 are connected to a controller 26 (alignment part position detecting means, printing part position detecting means), and the controller 26 drives the positioning mechanism 4 based on detection signals from these CCD cameras 24 and 25. Control. Note that the CCD camera 25 detects a mark printing point on the screen plate 13 and uses the detected value as a printing unit reference coordinate point (zero point) of the CCD camera 25, and the printing unit reference coordinate point of the CCD camera 24. Match as the matching part reference coordinate point (zero point).
[0032]
First, the first printing is performed as shown in FIG.
In FIG. 1A, among the printing materials 30 stacked by the supply unit 5, the printing material 30 for the first plate to be printed is at the highest position.
[0033]
In FIG. 1B, the first printing material 30 is conveyed from the supply unit 5 to the alignment table 3 of the alignment unit 1 and placed thereon, and is provisionally positioned at a preset position.
In FIG. 1 (c), the first printing substrate 30 is transported from the alignment table 3 of the alignment unit 1 to the printing table 9 of the printing unit 2 by the supply clamp 20 of the transport mechanism 16, is placed, and is positioned. Printing is performed on the one-plate printing material 30 by the printing mechanism 11 having the first screen plate 13. At this time, marks 33 are also printed on the first printing material 30 on both sides in the width direction Y near the front end 31 thereof.
[0034]
In FIG. 1D and FIG. 1E, the printed first plate printing material 30 is discharged from the printing unit 2 to the discharge unit 22 by the discharge clamp 21 of the transport mechanism 16. This completes the first printing of the first sheet 30 for the first plate.
[0035]
In FIGS. 1F and 1G, the first printing of the second and subsequent first printing substrates 30 is continuously performed in a similar process.
Next, after the first screen plate 13 is replaced with the second screen plate 13 by the printing mechanism 11, the mark position is detected before the second printing as shown in FIG.
[0036]
In FIG. 2A, the printed first printing material 30 is stacked as a second printing material 30 in the supply unit 5, and is adjusted on the uppermost second printing material 30. The printing substrate 30a is placed thereon.
[0037]
In FIG. 2B, the printing medium for adjustment 30a is conveyed from the supply unit 5 to the alignment table 3 of the alignment unit 1 and placed thereon, and is provisionally positioned at a preset position.
In FIG. 2C, the adjustment printing material 30 a is transported from the alignment table 3 of the alignment unit 1 to the printing table 9 of the printing unit 2 by the supply clamp 20 of the transport mechanism 16, and is placed thereon. The printed matter 30a is printed by the printing mechanism 11 having the second screen plate 13. At this time, marks 33 are also printed on the adjustment printing substrate 30a on both sides in the width direction Y near the front end 31 thereof.
[0038]
In FIG. 2D, the two CCD cameras 25 enter the printing unit 2 from the discharge unit 22 and detect both the marks 33 of the printing medium for adjustment 30a temporarily positioned by the matching unit 1.
In FIG. 2E, both CCD cameras 25 are retracted from the printing unit 2 to the discharge unit 22.
[0039]
In FIG. 2F, the printed adjustment target 30 a is discharged from the printing unit 2 to the discharge unit 22 by the discharge clamp 21 of the transport mechanism 16.
Next, the second printing is performed as shown in FIG.
[0040]
In FIG. 3A, the second plate printing material 30 to be printed is the highest position among the second plate printing materials 30.
In FIG. 3B, the second printing material 30 is transported from the supply unit 5 to the aligning table 3 of the aligning unit 1 and is placed thereon, and the second printing material 30 is provisionally positioned as in the first printing. Both the CCD cameras 24 detect both marks 33 of the printed matter 30. The controller 26 (comparing means) detects a reference detection value relating to the position of both the marks 33 of the printing medium for adjustment 30 a detected by the two CCD cameras 25 of the printing unit 2 and the second detection value detected by the two CCD cameras 24 of the matching unit 1. The actual detected values relating to the positions of the marks 33 of the two-plate printing substrate 30 are compared. Incidentally, the reference detection value is a coordinate value with respect to the printing unit reference coordinate point (zero point), and the actual detection value is a coordinate value with respect to the matching unit reference coordinate point (zero point). Further, the controller 26 (drive control means) drives the positioning mechanism 4 with the matching unit 1 based on the comparison result between the reference detection value and the actual detection value so that the actual detection value matches the reference detection value. To adjust the position of the alignment table 3. Accordingly, the second printing substrate 30 temporarily positioned by the alignment table 3 is adjusted in position and is finally positioned.
[0041]
In FIG. 3 (c), the second printing material 30 is transported from the alignment table 3 of the alignment unit 1 to the printing table 9 of the printing unit 2 by the supply clamp 20 of the transport mechanism 16, and is placed and positioned. The printing mechanism 11 having the second screen plate 13 performs printing on the printing material 30 for two plates.
[0042]
In FIG. 3D and FIG. 3E, the printed second plate printing material 30 is discharged from the printing unit 2 to the discharge unit 22 by the discharge clamp 21 of the transport mechanism 16. This completes the second printing of the first sheet 30 for the second plate.
[0043]
In FIGS. 3F and 3G, the second printing of the second and subsequent printing substrates 30 for the second and subsequent sheets is continuously performed in a similar process.
Incidentally, when the third and subsequent printings are performed on each of the printing materials 30 for the second version, the same processes as those described with reference to FIGS. 2 and 3 are performed.
[Brief description of the drawings]
FIGS. 1A, 1B, 1C, 1D, 1E, 1F, 1G, and 1G are operation explanatory diagrams showing a first printing in a screen printer according to an embodiment.
FIGS. 2 (a), (b), (c), (d), (e), and (f) are operation explanatory diagrams showing mark position detection performed before the second printing in the screen printing machine according to the embodiment.
FIGS. 3 (a), (b), (c), (d), (e), (f), and (g) are operation explanatory diagrams showing a second printing in the screen printing machine according to the embodiment.
FIG. 4 is a partial side view schematically showing the screen printing machine.
FIG. 5 is a partial plan view schematically showing the screen printing machine.
FIG. 6 is a partial plan view schematically showing the screen printing machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Alignment part, 2 ... Printing part, 3 ... Alignment stand, 4 ... Positioning mechanism, 9 ... Printing stand, 11 ... Printing mechanism, 13 ... Screen plate, 16 ... Transportation mechanism, 20 ... Supply clamp (substrate to be printed) , 21 ... discharge clamp (substrate to be printed), 24 ... CCD camera (matching part position detecting means), 25 ... CCD camera (printing part position detecting means), 26 ... controller (matching part position detecting means, printing part position detecting) Means, comparison means, drive control means), 30... The first and second printing materials, 30 a... The adjusting printing material, 33.

Claims (4)

A matching unit that adjusts and positions the position of the supplied printing material by a positioning mechanism, and a printing unit that positions the printing material supplied from the alignment unit by a transport mechanism and performs printing on the printing material by the printing mechanism. In a screen printing machine having juxtaposed, a matching section position detecting means for detecting the position of the printing medium supplied to the matching section, a printing section position detecting means for detecting the position of the printing medium supplied to the printing section, And a position adjusting device for a printing medium in a screen printing machine. Comparison means for comparing a reference detection value regarding the position of the printing material detected by the printing unit position detection means with an actual detection value regarding the position of the printing material detected by the matching unit position detection means,
The comparison means compares the reference detection value with the actual detection value, and based on the comparison result between the reference detection value and the actual detection value, drives the positioning mechanism of the matching section to print the print material supplied to the matching section. 2. The apparatus according to claim 1, further comprising drive control means for adjusting the position of the printing medium. The aligning unit includes an aligning table on which the printing medium is placed and positioned by the positioning mechanism, the printing unit includes a printing table on which the printing medium is mounted and positioned, and the transport mechanism includes the aligning table and the printing table. 3. The position of a printing material in a screen printing machine according to claim 1, further comprising a printing material attaching / detaching portion that reciprocates between the printing table and the printing material and conveys the printing material from the alignment table to the printing table. Adjustment device. The provisional position of the first printing material supplied in the alignment unit is positioned by a positioning mechanism, and the first printing material supplied by the transport mechanism from the alignment unit to the printing unit is positioned and the first printing plate is positioned. Printing on the printing substrate by a printing mechanism having a first screen plate,
Next, the provisional position of the adjustment printing material supplied in the alignment unit is positioned by a positioning mechanism, and the adjustment printing material supplied from the alignment unit to the printing unit by the transport mechanism is positioned to adjust the adjustment printing material. After performing printing by a printing mechanism having a second screen plate, the position of the mark printed on the printing medium for the adjustment is detected by the printing unit position detecting means,
Next, the first printing material on which the mark is printed is supplied again to the matching unit as the second printing material, and the position of the mark of the second printing material is detected by the matching unit position detecting means. ,
A reference detection value for the position of the adjustment print medium detected by the printing section position detection means is compared with an actual detection value for the position of the second printing medium detected by the matching section position detection means. Driving the positioning mechanism of the matching unit based on the comparison result between the reference detection value and the actual detection value, and adjusting the actual position of the second printing material supplied to the matching unit. For adjusting the position of a printing medium in a screen printing machine.

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