JP2889693B2 - Screen printing machine screen plate cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention is a cleaning operation in which the lower surface of a screen plate for applying an application agent to a printed circuit board is cleaned by a cleaning paper supplied by being wound around a supply roll and supplied. The present invention relates to a screen plate cleaning device of a screen printing machine that winds the paper around a take-up roll every time.

(B) Conventional technology In a screen plate cleaning device of this type of screen printing machine, the cleaning paper used for cleaning is wound up by a winding roll for each cleaning operation, and the cleaning paper of a supply roll gradually decreases. .

(C) Problems to be Solved by the Invention However, in the above-mentioned conventional technology, there is a disadvantage that when the cleaning paper of the supply roll runs out, cleaning cannot be performed even if the cleaning operation of the screen plate is performed.

Therefore, an object of the present invention is to prevent the cleaning operation of the cleaning plate from being performed in a state where the cleaning paper has run out.

(D) Means for Solving the Problems To this end, the present invention provides a method of cleaning the lower surface of a screen plate for applying an application agent to a printed circuit board by using a cleaning paper supplied by being wound around a supply roll and supplying the cleaning agent for each cleaning operation. In a screen plate cleaning device of a screen printing machine that winds the paper around a take-up roll, there is provided a paper-out notice detecting unit that performs a notice of a paper-out notice and outputs a paper-out notice signal by detecting a material shortage of the cleaning paper of the supply roll; Further, a notifying unit is provided for notifying the operator of the notice of the running out of the material of the cleaning paper when the paper out notice signal is output.

Further, the present invention also provides a paper-out notice detecting means for performing a notice-of-paper-out notice signal for performing the notice detection of the material-out of the cleaning paper of the supply roll, and the number of cleaning operations after the paper-out notice signal is outputted from the detecting means. It is provided with a counter for counting and a judging means for judging that the cleaning paper has run out of material when the counter has counted a predetermined number of times.

(E) Operation According to the configuration of claim 1, when the paper-out warning signal is output by the paper-out warning detection means detecting the material-out of the cleaning paper of the supply roll, the notification means operates. Notification of the running out of material on the cleaning paper.

According to the second aspect of the present invention, when the paper-out notice detecting means detects the material exhaustion of the cleaning paper of the supply roll and outputs the paper-out notice signal, the counter counts the number of cleaning operations. Is started, and when the counter counts a predetermined number of times, it is determined that the cleaning paper is out of material.

(F) Example An example of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, (1) is a screen printing machine, (2) is a supply conveyor section for supplying a printed circuit board (20) to be described later from an upstream device, and (4) is a supply conveyor section. It is a chuck position determining unit for positioning the chuck (5) for fixing (20).

(6) paste solder (17) to be described later on the substrate (20).
8) is a printing unit for printing, and (8) is a discharge conveyor unit having the same structure as the supply conveyor unit (2) for discharging the substrate (20) from the printing unit (6). (9) is a chuck (5)
When a new chuck (5) is to be replaced, a chuck supply unit on which a new chuck (5) is placed is provided, and (10) is a replaced chuck (5).
Is a chuck discharge table from which is discharged.

(11) is a recognition camera driving unit that drives the recognition camera (12). (14) is the cleaning unit, (15) is the operation unit,
(16) is a tower light, and (17) is a safety door. (1
8) is a door opening / closing sensor that detects the opening / closing of the safety door (17).

 Next, the chuck (5) will be described.

4 to 6, reference numeral (20) denotes a printed board, which is gripped and fixed by a chuck rail (23) provided on a movable wall (21) and a fixed wall (22). Fixed wall (22)
Is fixed to the chuck base (24) and the movable wall (21)
Is the guide rail (2) provided on the chuck base (24).
It is possible to move along the 5) while keeping parallel to the fixed wall (22), and the distance from the fixed wall (22) can be changed. A guide rod (26) extending parallel to the guide rail (25) from the fixed wall (22) passes through the movable wall (21), and a screw (27) fixes the movable wall (21) to the guide rod (26). By doing so, it is fixed to the chuck base (24).

A pulley (28) is provided on the fixed wall (22) and the movable wall (21), and a chuck belt (30) is stretched over each. A supply gear (31) is axially mounted on the pulley (28) at the end of the supply conveyor unit (2), and a discharge gear (32) is attached to the pulley (28) at the end of the printing unit (6). Is mounted on the shaft.
The chuck rail (23) is attached to a chuck roller (36) fitted in a roller groove (35) formed in a slide plate (34) that slides along a slide plate guide (33). The slide plate (34) is attached to the chuck cylinder (3
8) The chuck guide (3
Move along 9). The chuck rail (23) is provided with a chuck type identification hole (40) for identifying the type of the chuck (5) by the recognition camera (12). The holes (40) are also used to identify the chuck rail spacing.

A plurality of backup pins (41) are erected on the backup pin plate (42). The substrate (20) is represented by a solid line in FIG. 4 when the backup pin plate (42) is moved up and down by a cylinder (not shown). The upper surface of the substrate (20), which is indicated by a two-dot chain line, is moved up and down between a position supported by the chuck belt (30) and a position where the upper surface is substantially the same as the upper surface of the chuck rail (23). Reference numeral (43) denotes a chuck detection hole for detecting whether the chuck (5) is located at a correct position on the chuck supply unit (9), and is formed in the chuck base (24). Reference numeral (44) denotes a chuck-side connector for electrically discriminating the chuck type and for supplying power to various sensors and loads in the chuck (5) from the main body side. The central portion of the chuck base (24) is hollowed out, and a base inner wall (46) is formed.

There are various types of chucks (5), and those described with reference to FIGS. 4 to 6 are of a mechanical clamp lateral holding type, and a substrate (20) supported by backup pins (41) is attached to chuck rails (23). ), The vacuum suction table (47) as shown in FIG. 7, for example.
There is a method called a vacuum suction method in which a substrate (20) supported by vacuum suction is gripped and fixed laterally by a chuck rail (23) having a similar drive structure.

 Next, the supply conveyor section (2) will be described.

In FIGS. 8 and 9, reference numeral (49) denotes a supply side motor for rotating the drive pulley (50). A transmission belt (52) is stretched between the pulley (50) and the transmission pulley (51), and a belt drive pulley (5) is
3) is mounted on the shaft. The belt drive pulley (53) is supported by a pulley shaft (54). Belt drive pulley (53)
A supply belt (57) is wound around a pulley (56) disposed on the support wall (55), and the supply belt (57) disposed on the support wall (55) is driven by a supply-side motor (49). 57) rotates and carries the printed circuit board (20).

(58) is a movable support wall, which is movable along the guide shaft (59) and the pulley shaft (54). Movable support wall (58)
The belt drive pulley (53) is also supported on the pulley shaft (54) on the side, and the supply belt (57) is stretched between the pulley shaft (54) and the pulley (56). Among the pulleys (56) around which the belt (57) is stretched, the gear drive pulley (6) closest to the chuck positioning unit (4)
A drive gear (62) is axially mounted on the support gear (0) via a support wall (55) or a movable support wall (58).
Is engaged with the transmission gear (63).

The transmission gear (63) is mounted on a swinging plate (64) that can swing about the rotation axis of the drive gear (62), and (65) shows the swinging plate (64) in FIG. A spring for biasing to rotate in the counterclockwise direction, and (66) a stopper for restricting the swing plate (64) rotating in the same direction. The transmission gear (62) can engage with the supply side gear (31) of the chuck (5) fixed to the chuck positioning part (4), and the supply belt (5
The supply side gear (31) is rotated by the rotation of 7).

The discharge conveyor section (8) is also provided with a mechanism for driving the discharge gear (32) of the chuck (5).

 Next, the chuck supply table (9) will be described.

In FIGS. 2 and 10 to 16, reference numeral (68) denotes a chuck supply table on which the chuck (5) is mounted for replacement, and the inside of the chuck (5) on the table (68). Pressing piece (6
9) Alternatively, the sheet is pressed by the outer pressing piece (70) and moved to the chuck positioning section (4) along the supply table guide (71). (72) is a rodless cylinder for reciprocating the pressing pieces (69) (70), and the slider (74) slides along the cylinder (73). A moving body (75) is mounted on the slide (74). An inner pressing piece (69) is provided at the front end of a pressing piece mounting plate (75) mounted on the moving body (75), and a rear end is provided. An outer pressing piece (70) is attached to the pressing piece support shafts (76) and (77) so as to be swingable. A stopper rocking plate (79) is further mounted on the pressing piece mounting plate (75).

The pressing pieces (69) and (70) are urged by springs (not shown) to swing in the counterclockwise direction in FIG.

A stopper (83) that can swing around a support shaft (82) is supported on the chuck positioning unit (4) side of the chuck supply table (68) so that the stopper always swings counterclockwise in FIG. It is urged by a spring (not shown). (84) is the stopper (83)
12 is a chuck engagement roller provided at the right end of FIG.
As shown in Fig. 12, chuck (5) on chuck supply table (68)
To regulate the movement. Reference numeral (85) denotes a stopper swinging roller. When the stopper swinging plate (75) moves rightward in FIG. 12 by the operation of the rodless cylinder (72),
The rider rides on the swinging plate (75) along the tapered portion at the tip thereof, and swings the stopper (83) clockwise to release the regulation of the chuck (5).

Reference numeral (86) denotes a chuck detection sensor, which outputs a chuck position abnormality signal when the chuck (5) is not placed so that the chuck detection hole (43) is located on the sensor (86).

 Next, the chuck positioning unit (4) will be described.

In FIGS. 10 and 12 to 22, (87) denotes an XY-θ table on which the chuck (5) extruded from the chuck supply unit (9) is placed. The table (87)
Is composed of an X table (88), a Y table (89), and a θ table (90).

The X table (88) is a pair of X tables provided on the base (91).
When the X screw shaft (95) is rotated by the driving of the X motor (94) along the guide rail (93), it moves in the X direction via the X nut body (96). The X guide rail (93) covers the range from the chuck positioning unit (4) to the printing unit (6) with XY-
The θ table (87) is movably provided.

The Y table (89) is driven by a Y motor (97) to rotate a Y screw shaft (98), and a pair of Y guide rails (10) provided on the X table (88) via a Y nut body (99).
It moves in the Y direction along (0).

θ ball screw shaft (102) driven by θ motor (101)
The nut body (1) having a roller (103) at one end by the rotation of
04) moves along the screw shaft (102), but the roller (103) is fitted into the notch (105) of the θ table (90), and the θ support is moved by the movement of the roller (103). The θ table (90) rotates in the θ direction about the axis (106) as a fulcrum.

The θ table (90) is provided with a guide (108) for guiding the movement of the chuck (5), but two guides (108) on the right side in FIG.
0) swingable around the lock lever support shaft (109),
A lock lever (110) for fixing the chuck base (24) is provided. The lock lever (110) swings counterclockwise as shown in FIG. 16 when the cylinder (112) provided on the θ table (90) comes into contact with and is pressed against the cam follower (111) provided below. To lock the chuck base (24). The lock lever (110) is urged to swing clockwise in FIG. 17 by a spring (not shown).

(114) is a connector block attached to the rod (116) of the connector connecting cylinder (115) provided on the θ table, to which the main body side connector (117) is attached. When the rod (116) is retracted by the operation of the connector connecting cylinder (115), as shown in FIG.
17) is connected to the chuck-side connector (44).

In FIG. 22, (118) is an XY-θ table (87)
Is a table standby position detection sensor that detects a standby position on the side of the supply conveyor section (2). The sensor (118) may detect the origin in the X direction.

Next, the chuck discharge table (10) will be described with reference to FIGS. 1, 10, and 12 to 16. FIG.

The chuck discharge table (10) is also provided on both sides with discharge table guides (119) for guiding the movement of the chuck (5) pushed and moved from the θ table (90). The chuck discharge base (10) is further provided with an engagement claw (123) that can swing around the support shaft (121) and is constantly urged in the counterclockwise direction in FIG. 12 by a spring (122). The engaging claw (123) is engaged with the base inner wall of the chuck (5) placed on the discharge table (10), and the chuck (5) is moved in the direction of the chuck positioning part (4). ) Is prevented from returning. The chuck discharge table (10) is provided at a position for detecting the chuck base (24), and is provided with a chuck detection sensor (124) for detecting the presence or absence of the chuck (5).

 Next, the recognition camera driving section (11) will be described.

In FIG. 2, FIG. 3, FIG. 23 and FIG.
Numeral 6) denotes an X movable body, and a nut (1) is rotated by rotation of an X camera screw shaft (128) driven by an X camera drive motor (127).
It moves in the X direction along the X camera guide (129) via (29). A Y camera screw shaft (132), which is driven by a Y camera drive motor (131) and rotates, is attached to the X moving body (126), and a Y nut body (133) fitted to the screw shaft (132). The recognition camera (12) attached to the Y-axis moves along the Y camera guide (134) provided on the X movable body (126) in the Y direction by the rotation of the screw shaft (132). 40), the position of the substrate (20), and the position of the screen plate (144) described later are recognized.

A stopper cylinder (136) is further attached to the Y nut body (133) so as to extend and retract the rod (137) in the vertical direction, and a chuck positioning part (4) is provided via a stopper pin holder (138). A stopper pin (139) for regulating the printed circuit board (20) is connected at the tip of the rod (137). The stopper pin (139) is connected to the cylinder (13
By the operation of 6), it moves up and down while being guided through the inside of the Y nut body (133). A board sensor (140) for detecting the board (20) is attached to the stopper pin holder (138).

 Next, the printing section (6) will be described.

25 to 31, reference numeral (142) denotes a screen base on which a screen plate (144) is swingably mounted around a screen support shaft (143) provided on the base (142). The screen mounting base (145) to be mounted is mounted.
The screen base (142) has a screen positioning pin (1
The pin (146) is inserted between a pair of positioning rollers (147) provided on the screen mounting base (145) provided with the screen mounting base (145) so that the screen mounting base (145) is placed on the screen base (142). Positioned and fixed.

Reference numeral (149) denotes a squeegee mount that can swing around the screen support shaft (143). The squeegee mount is stacked on the screen mount (145), and is connected to the screen mount (145) by the connecting plate (150). You. The squeegee mount (149) is provided with a stopper (151) and a stopper (152). The stopper (151) comes into contact with a stopper bolt (153) provided on the screen base (142), and the stopper (152). ) Is the stopper bolt (15) provided on the screen mount (145).
4), and the vertical position of the screen mount (145) and the squeegee mount (149) with respect to the screen base (142) is regulated.

The connecting plate (150) is swingably mounted on the squeegee mounting base (149) by a connecting cylinder (157) provided on the squeegee mounting base (149) with a support bolt (156) as a fulcrum. An engagement groove (158) is cut out in the connection plate (150), and the connection plate (15) is operated by the operation of the cylinder (157).
0) oscillates and the engagement groove (158) fits into the screen mount (14).
The screen mounting base (145) and the squeegee mounting base (149) are connected by fitting the engaging bolts (159) provided in 5) as shown in FIG.

A support (161) is erected on the screen base (142), and a support (162) above the support (161) and a support (163) provided on the squeegee mount (149) are provided. A screen vertical cylinder (164) is rotatably mounted around each support shaft (162) (163), and the cylinder (164)
The squeegee mount (149) swings around the screen support shaft (143) by the operation of. When the squeegee mount (149) and the screen mount (145) are connected by the connecting plate (150), the screen mount (145) is integrated with the squeegee mount (149) by the operation of the cylinder (164). Rocks.

The squeegee mounting table (149) is further provided with a squeegee table guide (166), and the squeegee table (167) is movable along the guide (166) in the X direction. The rotation of the print motor (168) is reduced by the speed reducer (169) and transmitted to the drive pulley (170), which is rotated, and the drive pulley (1
When the squeegee belt (172) suspended between the driven pulley (171) and the driven pulley (171) rotates, the squeegee table (167) attached to the belt (172) moves. The squeegee table (167) is provided with a light shielding plate (173).
3) is detected by the origin detection sensor (174), whereby the origin position of the squeegee table (167) is detected.

The squeegee table (167) has two opposing squeegees (17
5) is guided by a squeegee vertical guide (176), and is mounted to be vertically movable by the operation of a squeegee vertical cylinder (177). When the squeegee moves down and moves as shown in FIGS. 32 to 39, the paste solder (178) passes through the pattern hole formed in the center of the screen plate (144) and the XY-θ table ( 87) Printed on the printed circuit board (20).

The base (91) is provided with four ball screw shafts (179) for supporting and moving the screen base (142) up and down to move the screen board (144) and the printed circuit board (20) toward and away from each other. The screen vertical drive pulley (181) is rotated by the drive of the screen vertical motor (180) to rotate the belt (18).
2) and the screen vertical rotation shaft (184) is rotated via the screen vertical driven pulley (183). The rotating shaft (18
4) is provided with a worm (185), which engages with the worm wheel (186) provided on the screw shaft (179), and the ball screw shaft (179) is rotated by the rotation of the rotation shaft (184). I do. A bevel gear (187) is provided on the rotating shaft (184), and a bevel gear (188) mounted on a rotating shaft (not shown) provided orthogonal to the rotating shaft (184). The engagement and the rotation of the rotation shaft (184) are transmitted to the ball screw shaft (179) on the opposite side in FIG. 26 by a similar structure.

The nuts (189) provided on the screen base (142) fit into the four ball screw shafts (179) rotating in this manner, and the screen base (142) is connected to the screen provided on the base (91). It moves up and down along the up and down guide (190).
The screen vertical motor (180) is connected to the paste solder (1
When the screen plate (144) is separated from the printed circuit board (20) after the application of (78), the screen plate (144)
A servo motor or a pulse motor is used to raise the screen plate (144) at a low speed so that the paste solder (178) does not remain on the end surface of the pattern hole.

 Next, the cleaning unit (14) will be described.

In FIGS. 40 to 46, reference numeral (192) denotes a cleaning unit which is guided by the X guide rail (93) and can move below the screen plate (144) in the X direction. 194). The belt (194) is stretched between a driving pulley (196) driven by a cleaning unit motor (195) and a driven pulley (197), and the rotation of the motor (195) causes the cleaning unit (192) to rotate. Moving. Reference numeral (198) denotes a cleaning origin detection sensor that detects the origin of the movement of the cleaning unit (192) in the X direction.

The cleaning unit (192) is provided with a paper supply roll (200) for winding the cleaning paper (199) with its end fixed, and the cleaning paper (199) supplied from the roll (200) feeds the paper. It is wound on the detection roll (201), and then wound along the surface of the cleaning roller (202) and wound on the winding roll (203).

(205) is a take-up motor, which is a torque limiter (20
The take-up drive pulley (207) is rotated via 6), and the take-up roll (203) is rotated via the take-up belt (208) and the take-up driven pulley (209). Cleaning paper (199)
Is supplied until the end, and the material runs out and the take-up roll (203)
When the torque limiter (206) stops rotating and a predetermined load is applied to the torque limiter (206), the torque limiter (206) is turned off and only the motor (205) runs idle.

Numeral (211) denotes a disk pivotally mounted on the paper feed detection roll (201), and slits (212) are provided at equal intervals around the periphery thereof. When the cleaning paper (199) is wound by the rotation of the winding motor (205), the roll (2
01) is rotated and the disk (211) is rotated by the same feed amount.
The feed amount of the cleaning paper (199) is detected by detecting the slit (212) through which the feed amount detection sensor (213) passes. The supply roll (200) is sandwiched between the brake spring (214) with a predetermined force, and the rotation of the supply roll (200) by the winding motor (205) is braked to stop the winding motor (205). If the supply roll (20
0) is also stopped at the same time, and the paper (199) is always stretched. The spring (214) sandwiches the supply roll (200) with a force that does not cut the torque limiter (206).

The cleaning roller (202) is provided at the tip of an arm (217) that can swing around a support shaft (216), and the tip of a rod (219) that moves up and down by the operation of a roller vertical cylinder (218). Is connected to the arm (217) via the spring (220), so that the cleaning roller (202) moves up and down by the operation of the cylinder (218). With the roller (202) raised and the paper (199) in contact with the lower surface of the screen plate (144), the cleaning unit (192) moves to automatically clean the lower surface of the screen plate (144). Done.

Numeral (222) is an actuator which can swing around the support shaft (223), and is urged in a counterclockwise direction in FIG. 46 by a spring (225) hooked on a spring hook (224) to supply the roll (200). Cleaning paper wound around (199)
And its position is determined by its winding diameter.
Reference numeral (226) denotes an out-of-paper notice switch, which is turned on by the actuator (222) when the winding diameter of the cleaning paper (199) reaches a predetermined amount, and outputs an out-of-paper notice signal.

 Next, the control system will be described.

47 and 48, reference numeral (229) denotes a CPU which performs various operations related to the printing operation of the printed circuit board (20) of the screen printing machine (1) based on information stored in the RAM (230).
This is performed according to the program stored in the ROM (231).

Reference numeral (232) denotes an interface for connecting the operation unit (15), the recognition camera (12), the CRT (233), various sensors, and the like, and a signal line (235) disposed on the main body side connector (117). , The signal 2 line (236), the signal 3 line (237) and the common line (238). The potential of the common line (238) is set to a low potential "L". The lines (235), (236), (237), and (238) correspond to the detection 1 pin (235A), the detection 2 pin (236A), the detection 3 pin (237A), and the common supply pin (23) provided on the connector (117), respectively.
8A). (239) is a drive circuit.

The RAM (230) has a printing counter (240) for counting the printing operation of the substrate (20) for each sheet, a cleaning counter (241) for counting the number of times of automatic cleaning, and a set number of times after the paper out notice signal is output. A paper-out notice counter (242) for decrementing every automatic cleaning is provided, as well as NC data, conduction data in FIG.
After the identification hole data and the paper out notice signal shown in FIG. 50 are output, the number of automatic cleanings set in the paper out notice counter (242) is set and stored. (twenty four
3) is a print counter for manual cleaning. 49 and 50, "chuck 1" corresponds to chuck type "1", and "chuck 2" corresponds to chuck type "2".

The chuck connector (44) has a signal 1 pin (244)
A signal 2 pin (245), a signal 3 pin (246), and a common pin (247) are provided. When connecting to the main body side connector (117), a detection 1 pin (235A) and a detection 2 pin (236) are respectively provided.
A), detection 3 pin (237A) and common supply pin (238A)
Connected to The chuck connector (44) in FIG. 47 is of the chuck type “1”, and the common pin (247) and the signal 2
Pin (245) is shorted. The chuck connector (44) in FIG. 48 is of chuck type "2", and the common pin (247) and the signal 3 pin (246) are short-circuited.

 Next, the operation unit (15) will be described.

The numeric keypad (24
9), cursor key (250), SET key (251) used to select the screen of CRT (233), teaching key (252) to enter NC data setting mode, manual operation such as home return Manual key for setting mode (253), Automatic key for setting automatic operation mode (254), Start key for starting operation (255), Operation key for starting setup change operation etc. (256) , A stop key (257) for stopping the operation is provided.

 Next, the setting operation of the NC data will be described.

First, when the teach key (252) is pressed, an NC DATA INFORMATION screen as shown in FIG. 51 appears on the screen of the CRT (233). Next, when the cursor key (250) is operated and the cursor (258) is set to "PCB-002" which is the type of the board to be set and the SET key (251) is pressed, the screen of the CRT (233) sets each data. OPERATION DATA EDIT screen.

Next, the operator operates the numeric keypad (249) or the like to input data as shown in the screen of FIG.

 Each data in FIG. 52 will be described.

“EDITING” indicates the type of board currently being set. "PCB SIZ
"E" indicates the size of the substrate (20) in the X and Y directions as "mm".
Data in units of "PRINTING (SINGLE / DOUBL
“E) SELECT” designates whether the printing operation is a reciprocating operation or a one-way operation, and “1” indicates a reciprocating operation.
"CHUCK TYPE" indicates the type of chuck according to the difference in the method of fixing the substrate (20) of the chuck (5), "1" is the chuck type of the mechanical clamp horizontal holding system described above, and "2" is the vacuum suction system. Indicates the type of chuck.

“SQUEEGEE PRINT AREA” is data indicating the range of the paste solder (178) to be printed in the X direction by the squeegee (175), and “L ₁ ” is the distance from the center of the screen plate (144) to the squeegee origin. `` M
Set in units of m "to" L ₂ "are set in units of" mm "the distance from the center to the opposite direction of the squeegee origin as the end position of the printing screen plate (144). This makes it possible to cope with printing of only a part of the printed circuit board (20).

"SQUEEGEE STROKE OFFSET 1" changes the squeegee (17) depending on the angle of the squeegee (175) with respect to the screen plate (144).
Since the reference position of the movement in the X direction of 5) and the position of the rear end portion of the squeegee (175) which is the contact point to the screen plate (144) are changed, the distance set to completely print the print range. It is data and is a unit of “mm”. "SQUEEGEE S
TROKE OFFSET 2 has a pair of squeegees (175). When one-way printing operation is completed and proceeds in the opposite direction, the squeegee (175) facing the squeegee (175) that has been performing the printing operation is pasted with paste solder ( 178) is distance data for moving to the position where it is shifted, and is set in units of “mm”. "SQUEEGEE SPEED" is paste solder (17
8) Data indicating the moving speed of the squeegee (175) during printing, and is set in units of "mm / sec".

"SCREEN SEPARATE SPEED" is a screen plate (144) that is rotated by the screen up / down motor (180).
Is the data that indicates the speed at which you move up to get away from
/ sec ". This data can be set at a slower speed than the ascending speed of the cylinder by using a servo motor, and the screen plate (144)
The speed can be arbitrarily set according to the size, shape, or viscosity of the paste solder of the pattern hole.
It can be set in the range of 1.4mm / sec from 5mm / sec.

“CLEANING AREA” is data for setting the cleaning range of the lower surface of the screen plate (144) by the cleaning roller (202), and “L ₁ ” and “L ₂ ” are set to “SQUEEGEE PRI”.
NT AREA ”. "CLEANING ROLLER SPE
"ED" is data indicating the moving speed of the cleaning roller (202) during the cleaning operation, and is set in units of "mm / sec". “PAPER FEED QUANTITY” is data specifying the paper feed amount when the paper (202) is wound by the winding roll (203) each time one cleaning operation of the cleaning paper (202) is completed. Is set in units of

“AUTOMATIC CLEANING IN TERVAL” is data that specifies the timing of the automatic cleaning operation of the lower surface of the screen plate (144) depending on how many substrates (20) are printed.
The number of times of printing on the substrate (20) is set.

"AUTOMATIC CLEANING COUNT" is data for specifying the timing of manual cleaning of the lower surface of the screen plate (144), and the number of times of the automatic cleaning operation is set. When “0” is set, the timing of manual cleaning is not specified according to the number of times of the automatic cleaning operation.

“PCB PRINTING COUNT” is data for designating the timing of manual cleaning of the lower surface of the screen plate (144), and the number of times of printing of the substrate (20) (that is, the number of printed substrates) is set. When "0" is set, the timing of manual cleaning is not specified according to the number of times of printing on the substrate (20). The number of movements of the squeegee (175) is set, and the squeegee (17
The count may be performed for each movement of 5).

The setting of the NC data of "PCB-003" is performed in the same manner and set as shown in FIG.

 The operation of the above configuration will be described below.

First, the PCB type “PCB-002” that will be used for printing
The operation of the setup change to cope with the above will be described. When the teaching key (252) is pressed, the CRT screen displays the screen shown in Fig. 51, and the current state of the screen printer (1) corresponds to the board type "PCB-001" as shown in CURRENT. It turns out that it becomes.

First, the operator operates the screen plate (144) of the printing unit (6).
To the one corresponding to "PCB-002". Then, the screw (27) of the movable wall (21) of the chuck (5) is loosened and the movable wall (21) is moved along the guide rail (25) and the guide rod (26) and stored in the NCDATA of the PCB-002. PCB in Y direction
Set the spacing between the chuck rails (23) to match the size of “70mm”. Thereafter, the operator places the chuck (5) on the chuck supply table (68).

At this time, the chuck (5) is a position where the chuck base (24) is restricted by the supply table guide (71), and a position where the end face of the chuck base (24) can abut on the outer pressing piece (70). Placed on At this time, the chuck detection sensor (86) is detecting the chuck detection hole (43).

Next, with the screen of FIG. 51 displayed on the CRT (233), move the cursor (258) to the PC with the cursor key (250).
Move to "2" indicating B-002 and press the operation key (256) to start the following setup change operation.

First, the replacement operation of the chuck (5) will be described as a part of the setup change operation.

First, the cylinder (112) operates and the lock lever (11
17), the lock of the chuck (5) with respect to the θ table (90) is released, and the connector connecting cylinder (115) is operated to operate the chuck-side connector of the chuck (5). The main body side connector (117) of the table (90) is separated from the main body (44) as shown in FIGS. 20 and 21. Then, the XY-θ table (87) moves a predetermined distance in the Y direction as shown in FIG.

Next, when the rodless cylinder (72) operates, the outer pressing piece (70) moves to the right in FIG.
In order to engage and press on 4), the chuck (5) moves along the guide (71). At this time, when the stopper rocking plate (79) moves rightward, the taper at the tip engages the stopper rocking roller (85), and the stopper (83) moves around the support shaft (82). Rotating clockwise in FIG. 13 releases the engagement with the chuck (5). And X-
The chuck base of the chuck (5) pressed by the outer pressing piece (70) on the chuck base (24) of the chuck (5) of the chuck type "2" placed on the Y-θ table (87). (24) is abutted and pressed, and the chuck (5) of chuck type "2" moves along the guide (108) to the position shown in FIG.

Next, the outer pressing piece (70) and the inner pressing piece (69) return to the left by the operation of the cylinder (72) in the reverse direction. At this time, when the taper of the inner pressing piece (69) comes into contact with the chuck base (24) and swings downward and escapes, and is released from the engagement of the base (24) when it returns to its original position, a spring (not shown) is used. As a result, the base (24) can be pressed upward as shown in FIG. Even when the rodless cylinder (72) is completely returned and the stopper rocking plate (79) is not engaged with the stopper rocking roller (85), the chuck (5) presses the chuck engaging roller (84). Stopper (8
3) keeps swinging downward.

Then, when the cylinder (72) is actuated again in the right direction in FIG. 14, the inner pressing piece (69) engages with the base (24) to press the chuck (5) and move to the position shown in FIG. Move. At this time, the chuck (5) of the chuck type “2” previously on the XY-θ table (87) is pushed by the chuck (5) on the XY-θ table (87) and It is discharged to (10). When the chuck (5) moves on the chuck discharge table (10), the engaging claw (123) is pressed by the base (24) by the taper and swings downward. When the ejection of () is completed, the engagement of the base (24) is released and the spring (122) is in a state of swinging upward by the bias of the spring (122) as shown in FIG. Even if it attempts to move to the XY-θ table (87) side, the engaging claw (123) engages with the base inner wall (46) to restrict the movement of the chuck (5).

Thereafter, the XY-θ table (87) moves toward the chuck supply table (68) as shown in FIG. 16 and stops at a position where the printed circuit board (20) can be received from the supply conveyor section (2). .

Next, the cylinder (112) and the connector connecting cylinder (1
15) operates to connect the chuck-side connector (44) and the main-body-side connector (117) from the state of FIGS. 20 and 21 to the state of FIG. 19, and the lock lever (110) to the state of FIG. To the state shown in FIG. 17, and the chuck (5) is
It is fixed to the Y-θ table (87). The chuck (5) always stops at a predetermined position by the operation of the rodless cylinder (72).

Next, as a setup change operation, chuck side connector (44)
A check operation is performed to check whether the type of the chuck (5) according to the state of the potential of each pin matches the one specified in the NC DATA of the PCB-002. This operation will be described.

Main unit side connector (117) and chuck side connector (44)
Is connected, the signal 1 line (235), the signal 2 line (236), and the signal 3 line (23) of the main body side connector (117) are connected.
7) and common line (238) are pins (235A) (236
A) (237A) (238A) chuck side connector (4
4) signal 1 pin (244), signal 2 pin (245), signal 3
Pin (246) and common pin (247). The chuck type of the chuck (5) is "1", and the common pin (247) and the signal 2 pin (245) are short-circuited as shown in FIG.

Since the common line (238) is at the “L” potential, the potential of the signal 2 pin (245) is also at the “L” level, but the signal 1 pin (244) and the signal 3 pin (246) are open. It has become. Therefore, the signal 1 line (235) and the signal 3 line (237) are also at the potential “H” in the open state,
The PU (229) receives a signal 1 line (235), a signal 2 line (236), and a signal 3 line (23) via the interface (232).
The signals of "1", "0", and "1" are detected in the order of 7). C
The PU (229) compares this result with the conduction data of the chuck type “1” in the RAM (230) and agrees with each other. Therefore, the PU (229) determines that the correct chuck (5) has been replaced, and determines that the chuck (5) has been replaced. 5) Energize the sensor, load, etc. through the connector to initialize.

Next, a setup change operation for checking the type of the exchanged chuck (5) and the width between the chuck rails (23) using the recognition camera (12) is performed. The operation will be described.

First, the rotation of the X camera driving motor (127) moves the X moving body (126) in the X direction via the X camera screw shaft (128) and the nut (129), and the Y camera driving motor (131).
Camera screw shaft (132) and Y nut body (1
The movement through 33) moves the recognition camera (12) in the XY direction and stops on the chuck type identification hole (40) of the chuck rail (23) of the fixed wall (22).

Then, the recognition camera (12) captures an image of the identification hole (40), and the diameter of the identification hole (40) and the recognition camera driving unit (11).
The position within is recognized. The chuck (5) is of chuck type “1” and the diameter of the identification hole (40) is “0.7 mm”. When it is recognized that the chuck hole is “0.7 mm”, the “PCB” specified by the NC data is recognized. Since the chuck type of “−002” is “1”, it is confirmed from the identification hole data stored in the RAM (230) that the diameter of the identification hole (40) is “0.7 mm”, so that they match. . When it is determined that the exchanged chuck (5) is as specified, the recognition camera (12) moves to above the identification hole (40) on the chuck rail (23) of the movable wall (21). Then, an image of the identification hole (40) is taken, and its position in the recognition camera driving section (11) is recognized.

Then, the distance between the two identification holes (40) is calculated by the CPU (229) from the recognized positions of the two identification holes (40), and the width between the two chuck rails (23) is calculated. The NC data of the PCB-002 is compared with the board width “70 mm” in the Y direction, and if it is within an allowable range, the check on the chuck (5) by the recognition camera (12) ends.

Next, the position of the replaced screen plate (144) is checked by the recognition camera (12).

First, the screen vertical cylinder (164) operates in the contracting direction, and only the screen mount (145) is placed on the screen base (142), but the squeegee mount (167) is supported by the support shaft (167). 143) swinging around the fulcrum and rising
As shown in Fig. 28, the recognition camera (1
2) XY movement is performed to recognize the position of a recognition mark (not shown) attached to the screen plate (144). At this time,
The mounting angle of the squeegee (175) is also adjusted to an appropriate angle.

When the recognition operation is completed, the screen vertical cylinder (164) operates in the extending direction, the squeegee mounting base (149) swings downward, and the stopper (151) and the stopper (152) are moved to the stopper bolt (153) and the stopper bolt, respectively. Contact (154). Then, the connecting cylinder (157) is operated, the connecting plate (150) swings from the state of FIG. 31 to the state of FIG. 30, and the engaging bolt (159) is fitted into the engaging groove (158). The squeegee mount (149) is formed integrally with the screen mount (145). In parallel with these operations, the supply conveyor (2)
And the conveyor width of the discharge conveyor section (8) is automatically changed in accordance with the Y-direction size "70mm" stored in the NC data of the board (20) of the board type "PCB-002" to be conveyed. .

 Thus, the setup change operation ends.

Next, paste solder (178) to the printed circuit board (20)
Will be described.

As described above, when the setup change to “PCB-002” is completed, the operator presses the automatic key (254) and starts the key (255).
When the is pressed, the X motor (94) rotates, the XY-θ table (87) moves to the left side in FIGS. 2 and 3, and the supply gear (31) of the chuck (5) moves to the supply conveyor section. The transmission gear (63) of (2) is engaged as shown in FIGS.

Then, the supply side motor (49) rotates, and the supply belt (57) rotates via the drive pulley (50), the transmission belt (52), the transmission pulley (51), and the belt drive pulley (53),
The printed circuit board (20) is transported. The rotation of the supply belt (57) rotates the gear drive pulley (60), rotates the drive gear (62), and drives the supply gear (31) via the transmission gear (63). As a result, the pulley (28) pivotally attached to the gear (31) is rotated, the chuck belt (30) is rotated, and the substrate (20) transported to the supply belt (57) is transported.

When the supply and transfer operation of this substrate (20) is started, the RAM
The X camera drive motor (127) and the Y camera drive motor (131) are rotated from the X data "100" of the PCB SIZE in the NC data in (230) to rotate the chuck (5) at the center position in the X direction of the chuck (5). Move the stopper pin (139) to the position where the center of 20) stops. That is, the stopper pin (139) is moved to a position 50 mm away from the center of the chuck (5) in the X direction toward the printing section (6). And the stopper cylinder (13
6) Operate to lower the stopper pin (139).

When the printed circuit board (20) is conveyed to the chuck belt (30) in this manner, the printed circuit board (20) comes into contact with the stopper pins (139) and is stopped, and the board sensor (1) is stopped.
40) detects the board (20), and the CPU (2)
29) stops the supply motor (49) and stops the rotation of the chuck belt (30).

Next, a fixing operation by the chuck (5) of the printed board (20) stopped on the chuck belt (30) in contact with the stopper pin (139) is performed. This operation will be described.

First, a backup pin plate (4) in which a large number of backup pins (41) are arranged by vertical movement means (not shown).
2) is lifted to support the substrate (20) on the chuck belt (30) and raised to a position above the chuck rail (23) indicated by a two-dot chain line in FIG. Next, the chuck cylinder (38) is operated, and the slide plate (3) is moved by moving the slide plate (34) rightward along the guide (33).
4) Roller groove (35) according to the movement of roller groove (35) inside
The roller (36) inside moves to the inside of the chuck (5), and the chuck rail (23) to which the roller (36) is fixed moves the chuck rail (23) along the guide rake (25) in the direction of narrowing the gap. , And hold and fix the printed circuit board (20). When the fixing operation of the board (20) is completed, the XY-θ table (87) moves in a direction to separate from the supply conveyor unit (2) by the rotation of the X motor (94).

Next, the position of the board (20) is recognized by the recognition camera (12).

That is, the rotation of the X camera drive motor (127) and the Y camera drive motor (131) causes the recognition camera (12) to move the substrate (2).
The board (20) moves to the positioning mark (not shown)
Is recognized. Based on this recognition result and the above-mentioned recognition result of the position of the screen plate (144), the XY position is set so that the substrate (20) is positioned at the center of the screen plate (144) relative to the screen plate (144). −θ table (8
7) is moved along the X guide rail (93) in the X direction by the rotation of the X motor (94) and along the Y guide rail (100) in the Y direction by the rotation of the Y motor (97). 144) Stop at the bottom.

Then, the θ table (9) is rotated by the rotation of the θ motor (101).
0) rotates in the θ direction around the θ support shaft (106), and the substrate (2
0) is positioned at a position to be positioned with respect to the screen plate (144).

The reason why the paste solder is applied at the center of the screen plate (144) is to further increase the accuracy with respect to printing misregistration. Chuck (5) as described above
It is possible to position the substrate (20) in the center of the screen plate (144) even if the substrate (20) is not fixed at the center of the chuck, but the small substrate (20) is held at the end of the chuck (5). When fixed, the end of the chuck (5) comes into contact with the mounting base (145) of the screen plate (144), so that the substrate (20) is fixed to the center of the chuck (5).

Next, the screen vertical motor (180) rotates, and the screen vertical rotation shaft (184) rotates via the screen vertical drive pulley (181), the belt (182), and the screen vertical driven pulley (183). The worm wheel (186) meshing with the worm (185) provided on the shaft (184) rotates, and the ball screw shaft (179) rotates. Then, a rotating shaft provided with a bevel gear (188) meshing with a bevel gear (187) provided on the rotating shaft (184) is rotated, and a ball screw having a similar structure (not shown) is rotated. As a result, the screen base (142) descends from the state shown in FIG. 26 to the position shown in FIG. 27 along the screen vertical guide (190).

Thereafter, the printing operation of the paste solder (178) on the substrate (20) by the movement of the squeegee (175) is performed. This printing operation will be described.

When the "PRINTING (SINGLE / DOUBLE) SELECT" of the NC data is "1", the reciprocating printing mode is selected. The print motor (168) rotates, and the drive pulley (170)
The squeegee table (167) moves at a higher speed than the origin position via the driven pulley (171) and the squeegee belt (172), and is located immediately before the substrate (20) indicated by a solid line in FIG. Stop at the position indicated by the solid line. The stop position is such that the midpoint position between the left and right squeegees (175) (hereinafter referred to as the squeegee reference position) is displayed on the "SQUEEGEE PRINT AREA L ₁ " from the center position of the screen plate (144).
OFFSET 1 ”is added and“ SQUEEGEE STROKE OFFSET 2 ”is subtracted, that is, the 60 mm squeegee origin side (right side in Fig. 32)
This is a position where the vehicle stops at a position far away from the vehicle.

Next, as shown in FIG. 33, when the right squeegee (144) is lowered by the operation of the cylinder (177), the printing motor (16
8), the squeegee table (167) moves and the squeegee (175) moves up to the position shown by the solid line in FIG. 34 to the speed specified by the NC data "SQUEEGEESPEED""60mm /
Move while printing paste solder (178) on board (20) in "sec". Squeegee (175) indicated by the solid line in FIG.
The stop position of the squeegee is the screen plate (14
4) From the center of "SQUEEGEE PRINT AREA L ₂ " to "SQUEEGE
ESTROKE OFFSET 1 ”, that is, the position where the robot stops at a position 90 mm away from the squeegee origin.

Printed circuit board (20) of paste solder (178)
Printing in the reciprocating direction to is completed.

Next, the descending right squeegee (175) rises as shown in Fig. 35, and the squeegee stand (167) moves to "SQUEEGEE STRO".
It moves at a high speed toward the "30 mm" squeegee origin indicated by "KE OFFSET 2" and stops at the position indicated by the solid line in FIG. 36, which is the position immediately before the gathered paste solder (178).
Then, the left squeegee (175) is lowered by the operation of the cylinder (177) as shown by the solid line in FIG.

At this time, the operations of raising the right squeegee (175), lowering the left squeegee (175), and moving the squeegee table (167) at high speed may be performed in parallel.

Next, the rotation of the print motor (168) moves the squeegee reference position from the center of the screen plate (144) toward the squeegee origin to "SQUEEGEE PRINT AREA L ₁ " and "SQUEEGEE STROKEOFF".
The squeegee (175) moves at the speed specified by NC data “SQUEEGEE SPEED” at “60 mm / sec” to the distance obtained by adding “SET 1”, that is, the position shown by the solid line in FIG. , Paste solder to printed circuit board (20) (178)
Is completed, and the printing operation of the paste solder (178) on the substrate (20) is completed.

At this time, the print counter (240) counts “1”. Thereafter, the squeegee (175) rises as shown in FIG.

Next, the screen vertical motor (180)
CREEN SEPARATE SPEED ", the screen base (142) rises, and the screen plate (144)
FIG. 26 shows that the paste solder (178) of the screen plate (144) does not remain on the end face of the pattern hole formed in the screen plate (144) due to friction at the speed of “0.7 mm / sec” indicated by the data. Rise to the position of and leave. At this time, after rising completely, the distance may be increased at a high speed.

Next, the XY-θ table (87) on which the printed circuit board (20) is placed is set at a position where the substrate (20) can be discharged by the movement in the Y direction and the rotation in the θ direction, and the X motor (94) Is moved to the discharge conveyor section (8) by the rotation of the discharge gear (3).
2) is engaged with a gear (not shown) of the discharge conveyor section (8) in the same manner as in the case of the supply conveyor section (2).

Then, the chuck rail (23) is opened by the operation of the cylinder (38), the substrate (20) is released, the backup pin (41) moves down, and the substrate (20) is placed on the chuck belt (30). You. Thereafter, when the discharge conveyor section (8) starts to rotate, the chuck belt (30) conveys the substrate (20) and transfers the substrate (20) to the discharge conveyor section (8), whereupon the discharge conveyor section (8).
Discharges the substrate (20) to a downstream device.

Next, the XY-θ table (87) is moved to the supply conveyor unit (2) side by the rotation of the X motor (94), and the supply gear (31) is moved to the supply conveyor unit (2) as described above. Of the transmission gear (63). Then, the supply-side motor (49) rotates, and the supply belt (57) conveys the next substrate (20) and transfers the substrate (20) to the chuck belt (30).

Then, in the same manner as described above, the substrate (20) is fixed and positioned below the screen plate (144). Then, the screen plate (144) is lowered to print the paste solder (178) by the squeegee (175). By this time, the squeegee (175) is moved from the position shown in FIG.
The movement to the position shown in the figure has been completed, the right squeegee (175) immediately descends, and thereafter printing is performed in the same manner as described above, and the print counter (240) advances to "2".

Thereafter, the substrate (20) is discharged, and the same operation as described above is performed for printing the next substrate (20).

Thus, the number of times the substrate (20) has been printed is
"AUTOMATIC CLEANING INTERV"
After "10" set in "AL", when the substrate (20) is discharged by the discharge conveyor section (8), an automatic cleaning operation of the lower surface of the screen plate (144) is performed. When the print counter (240) reaches the set value, it is cleared and becomes "0". The automatic cleaning operation will be described.

When the printed substrate (20) is discharged as described above, the XY-θ table (87) moves to the supply conveyor unit (2) side by the rotation of the X motor (94), and moves to the table standby position. It stops at the position detected by the detection sensor (118). This position is also a position where the transmission gear (63) of the supply conveyor section (2) and the supply gear (31) are engaged. After the detection sensor (118) detects the XY-θ table (87), the XY detected by the cleaning origin detection sensor (198) below the discharge conveyor section (8) as shown in FIG. The cleaning unit (192), which has been waiting at a position where it does not collide when the substrate (20) is transferred to the discharge conveyor unit (8) by the θ table (87), is rotated by the cleaning unit motor (195). X by rotation of (194)
It moves to below the screen plate (144) along the guide rail (93). The cleaning unit (192) does not move in the X direction unless the table standby position detection sensor (118) detects the XY-θ table (87), and the cleaning origin detection sensor (118) XY if the cleaning unit (192) is not detected
The -θ table (87) is configured not to move in the X direction.

Next, the roller vertical cylinder (218) operates and the arm (2
17) swings upward with the support shaft (216) as a fulcrum, and the roller (202) around which the cleaning paper (199) is wound is pressed against the lower surface of the screen plate (144) by a spring (220).
Abut as shown in Figure 55. "CLEANING AREA" in discharge conveyor portion than the center of the screen plate (144) because it is specified as "L ₁ = 65" (8) side to a distance "65mm" of the contact position is NC data for the roller (202) It is far away. With the roller (202) moving upward and the cleaning paper (199) in contact with the screen plate (144), the cleaning unit motor (195) rotates and the NC data "CLEANING ROLLER S"
Roller (202) at speed "50mm / sec" set by "PEED"
The cleaning paper (199) runs on the screen plate (1
Wipe the bottom surface of 44). The roller (202) is N from the center of the screen plate (144) toward the supply conveyor (2).
Distance specified by "CLEANING AREA L ₂ " of C data "65m
After traveling from the center of the screen plate (144) to "m", the motor (195) stops.

Here, the cleaning paper (199) wound around the roller (202) is wound around a winding roll (203) by rotation of a winding motor (205). The cleaning paper (199) is supplied from the supply roll (200), and the paper feed detection roll (2
01) is wound on the take-up roll (203) via the roller (202) while rotating without slipping. The slit of the disk (211) attached to the end of the paper feed detection roll (201) (212) is detected by the sensor (213), and the feed amount “15mm” set in “PAPER FEED QUANTITY” of the NC data
When it is detected that the sheet has been sent, the rotation of the winding motor (205) is stopped.

Next, the cleaning unit motor (195) is rotated, and the cleaning unit (192) is moved toward the discharge conveyor unit (8) by the cleaning paper (199) on the screen plate (144).
It moves while wiping the lower surface, and the roller (202) moves a distance “6” from the center of the screen plate (144) to the discharge conveyor (8) side.
Stop when it reaches the 5mm position. Then, the roller up / down cylinder (218) operates, the arm (217) swings downward, and the roller (202) moves away from the lower surface of the screen plate (144) and descends.

Next, in the same manner as described above, the cleaning paper (199)
Is wound on the take-up roll (203), the cleaning unit (192) moves to a position detected by the cleaning origin detection sensor (198) on the discharge conveyor (8) side. Thus, when the automatic cleaning operation is completed, the cleaning counter (241) counts the number of times of automatic cleaning “1”.

While the cleaning operation is being performed, the next substrate (20) is supplied from the supply conveyor section (2) onto the chuck belt (30), and is held and fixed by the chuck rail (23) in the same manner as described above. However, the automatic cleaning operation has been completed and the cleaning origin detection sensor (19
8) If the cleaning unit (192) is detected,
The XY-θ table (87) moves below the screen plate (144) along the X guide rail (93) to position the substrate (20), and paste solder (178) as described above.
Is printed.

When the above operation is repeated and the cleaning counter (241) reaches "12" set in the "AUTOMATIC CLEANING COUNT" of the NC data, an operation for performing manual cleaning is performed.

That is, when the cleaning counter (241) becomes “12” and the cleaning unit (192) moves and is detected by the cleaning origin detection sensor (198), the connecting plate (15)
0) is engaged with the engagement bolt (159) and the squeegee mounting base (14
The screen vertical cylinder (164) is operated with the 9) and the screen mounting base (145) integrally connected, and the space between the screen plate (144) and the screen base (142) is opened as shown in Fig. 29, and the cleaning counter is opened. (241) is cleared. Thereafter, the power is turned on but all the motors and cylinders are not driven, and the current position is maintained. In this case, it is assumed that the next substrate (20) is fixed to the chuck (5) and recognition of the substrate (20) by the recognition camera (12) has been completed. Then, the yellow lamp of the tower light (16) blinks to notify the operator that it is necessary to manually clean the lower surface of the screen plate (144). At this time, a manual screen board (14
A message indicating that the cleaning standby state of 4) is displayed.

Next, when a worker comes and opens the safety door (17), the door opening / closing detection sensor (18) detects and turns off the yellow lamp of the tower light (16), but the power remains on. The CPU (229) does not issue a command to drive the motor and the cylinder, but the rotational position of each motor and the state of each cylinder are stored in the RAM (230). The operation of the operation unit (15) does not accept any operation other than checking the CRT screen or turning off the power.
In such a state, the operator manually wipes and cleans the lower surface of the screen plate (144).

When the cleaning is completed, the operator closes the safety door (17) and presses the start key (255). Start key (255) after sensor (18) detects that safety door (17) is closed
Is pressed, the CPU (229) operates the screen vertical cylinder (164) to close the screen plate (144) against the screen base (142) to bring it to the state shown in FIG. However,
There is no substrate (20). Then, the XY-θ table (87) moves below the screen plate (144), and the positioning is performed as described above and the printing operation is performed.

The above operation is repeated, but when printing of the board (20) of “PCB-002” is completed, the screen printing machine (1) is stopped. When stopped, all drive sources such as the print motor (168) return to the origin position.

Next, the printing operation of the substrate (20) of “PCB-003” is to be performed, but first the setup is changed. The operator presses the teaching key (252) and replaces the screen plate (144) with that of "PCB-003" as described above.
After placing the chuck (5) with the chuck rail width of "200mm" for "3" on the chuck supply table (68) in the same manner as above, use the screen of the CRT (233) in Fig. 56 as above. "PC
Move the cursor (258) to "3" indicating "B-003" and press the operation key (256). Then, the same setup change operation as in the case of “PCB-002” is performed.

In this case, first, the connector connecting cylinder (115) is operated, and the chuck side connector (44) is moved to the main body side connector (11).
7) When connected to the chuck side connector (4
4) As shown in Fig. 48, the common pin (247) and signal pin (24
5) is short-circuited and the other pins are open, so that the signal 1 line (235), the signal 2 line (236) and the signal 3 line (237) are "1", "1" and "0", "PCB-
Since the data coincides with the data shown in FIG. 49 of the chuck type “2” indicated by the NC data of “003”, the sensor, load, etc. of the chuck (5) are energized through the connector and initialized.

Then, a camera (12) that recognizes the chuck type identification hole (40)
Recognizes that the hole diameter is "1.0mm"
No. 50 of chuck type "2" indicated by NC data of "-003"
Confirm that it matches the data shown in the figure. After that, the setup change operation is continued as in the case of “PCB-002”.

Then, press the automatic key (254), and then press the start key (2
When 55) is pressed, the printing operation of the paste solder (178) on the substrate (20) is started in the same manner as described above.

The substrate (20) of “PCB-003” is shown by a two-dot chain line in FIGS. 32 to 39, and “SQUEEGEE PRINT AREA” of the NC data of the RAM (230) is “L ₁ = 150”; "L ₂ = 150"
Therefore, the squeegee (175), which is rotated at a high speed by rotating the print motor (168), stops at the position shown by the two-dot chain line in FIG. Next, as shown by the two-dot chain line in FIG. 33, the squeegee (175) descends and “L ₂ = 150”, so that the NC data “SQ” reaches the position shown by the two-dot chain line in FIG.
Move while pressing the screen plate (144) at the speed indicated by “UEEGEE SPEED” and “80 mm / sec”, and paste solder (1
78) is printed on the substrate (20) indicated by the two-dot chain line.

Next, the descending right squeegee (195) moves upward as shown in Fig. 35, and the NC data "SQUEEGEE STROKE OFFSET"
Move at a high speed at a distance of "30mm" indicated by "2" and
Stop at the position indicated by the dashed line.

Thereafter, the squeegee (175) on the left side shown by the two-dot chain line as shown in FIG. 37 descends and “SQUEEGEE PRINT AREA” is “L ₁ = 150”. The speed indicated by “SQUEEGEE SPEED” up to the indicated position “80 mm / s
ec "and the printing of the paste solder (178) in the backward direction is completed. Then, the squeegee “175” rises as shown by the two-dot chain line in FIG.

Then, as in the case of the above-mentioned “PCB-002”, the screen plate (144) rises away from the substrate (20) and separates therefrom.
0) is discharged by the discharge conveyor section (8).

Next, paste solder (178) is printed on the next substrate (20) in the same manner as described above.
The squeegee (175) has been moved from the position indicated by the two-dot chain line in FIG. 39 to the position indicated by the two-dot chain line in FIG. 32 until the position (0) is positioned below the screen plate (144).

After that, “AUTOMATIC CLEA” of NC data of “PCB-003”
When the paste solder (178) printing operation is completed for the tenth board (20), which is the number of printed boards set in “NING INTERVAL”, the data “L ₁ = 16” in “CLEANING AREA”
5 ”and“ L ₂ = 165 ”to“ CLEANING ROLLER ”
At the speed “70mm / sec” indicated by the SPEED data,
Automatic cleaning is performed in the same manner as in the case of "002".

The counter (243) counts “50” because the PCB PRINTING COUNT is set to “50”, and the printing of the paste solder (178) is completed for the 50th board (20). When the discharge according to 8) is completed,
Screen board (144) as in the case of “PCB-002”
The screen vertical cylinder (164) operates to lift the screen plate (144) to clean the lower surface manually. Next, the cleaning is performed by the operator, and the printing operation is continued by pressing the start key (255).

The above operation is repeated, but every time the automatic cleaning operation is performed, the cleaning paper (199)
Is wound on a winding roll (203), and the diameter of the paper (199) wound on the supply roll (200) gradually decreases. When the winding diameter of the paper (199) of the supply roll (200) decreases, the actuator (22) is urged by the bias of the spring (225).
2) rotates about the support shaft (223) as a fulcrum, and turns on the notice switch (226) at the position indicated by the two-dot chain line shown in FIG.
Outputs a paper out notice signal.

The CPU (229) turns on the yellow lamp of the tower light (16) in response to the paper out notice signal, and displays a paper out notice on the screen of the CRT (233). Then, the number of times that automatic cleaning can be performed is set to “5” in the paper-out notice counter (242).
Is set. Thereafter, if the paper is not replaced, the counter (242) is decremented for each automatic cleaning. At this time, the possible number stored in the counter (242) is
It may be displayed on the screen of the RT (233). The automatic cleaning is performed five times after the paper out notice is made, and when the counter (242) becomes "0", the yellow lamp of the tower light (16) flashes and the printing operation stops. At the same time, an out-of-paper display is displayed on the screen of the CRT (233). At this time, the cleaning unit (192) may stand by at a position where replacement is easy.

Next, the operator opens the safety door (17), replaces the cleaning paper (199) with a new one, and then opens the safety door (17).
Close. When the door open / close detection sensor (18) detects that the safety door has been opened, the excitation of each motor is shut off and the rotation position of each motor is lost, so the home position return operation of each motor and cylinder is started before starting automatic operation. Do.

For this purpose, first, the manual key (253) is pressed and the MAN shown in FIG. 57 is pressed.
Move the cursor (258) on the UAL SELECTION screen and RETU
When the operation key (256) is pressed according to the RN OPERATION, the home position return operation of each motor and cylinder is performed. Thereafter, when the automatic key (254) is pressed and the start key (255) is pressed, the printed circuit board (20) is moved to the supply conveyor section (2).
And the printing operation described above is performed.

Further, when the cleaning paper (199) is replaced while the paper out notice is displayed, the operator presses the stop key (257) to stop the printing operation. At this time, the board that is currently performing the printing operation (20)
Is discharged to the discharge conveyor section (8), the screen printing machine (1) stops. Then, the cleaning paper (199) is replaced in the same manner as after the safety door (17) is opened and the paper-out display is performed, and the automatic operation of the printing operation is restarted.

In addition, the detection of the paper exhaustion is performed by the cleaning paper (19
9) is wound up to the end, and the end is a supply roll (200)
When it is pulled because it is fixed to the motor, the torque limiter (20
6) receives a predetermined load and the winding motor (205) runs idle, but the disk (211) does not rotate and the sensor (213) does not detect the feed amount of the cleaning paper (199). It can be done.

If the cleaning paper (199) is cut at any position without the torque limiter (206), the paper feed detection roll (201) does not rotate, and therefore the feed amount detection sensor (213) is Is not detected, but the winding motor (205) is rotating. Alternatively, when the end of the cleaning paper (199) is not fixed to the supply roll (200), the cleaning of the paper (1) is performed.
When 99) has been supplied to the end, the feed amount detection sensor (213) does not detect that the paper is being fed, but the winding motor (205) is rotating. Therefore, the feed amount detection sensor (213) is provided without providing the torque limiter (206).
Winding motor without detecting that paper is being fed (205)
When is rotated, the CPU (229) may determine that the cleaning paper (199) is out of material.

In addition, a preset paper cleaning count (242) stores a preset number of times that automatic cleaning can be performed, and the counter is set for each automatic cleaning operation after a paper running warning signal is output when the warning switch (226) is turned ON. Alternatively, the counter (242) may be subtracted, or the counter (242) may be set to “0”, and the counter (242) may be incremented every automatic cleaning operation after the advance notice signal, and the stored automatic cleaning may be performed. When the number of times is reached, the paper may be exhausted.

In addition, the number of times that automatic cleaning is possible after the notice of paper exhaustion is set to “PAPER FEED QUANTITY” by storing the remaining distance of the cleaning paper (199) when the advance switch (226) is turned “ON”. It may be calculated from the paper feed amount.

When the chuck (5) is replaced, the data of "CHUCK TYPE" is "1" in the "PCB-002" and the chuck (5) of the chuck type "1" is to be replaced. Is mistaken for chuck of chuck type "2" (5)
Is placed on the chuck supply table (68) and the operation key (256) is pressed as described above, and the chuck (5)
After being transferred onto the Y-θ table (87), it is locked by the lock lever (110) and the chuck side connector (44) and the main body side connector (117) are connected. Then, since the signal 3 pin (246) is "L" and the signal 1 pin (244) and the signal 2 pin (245) are open, the signal 1 line (2
35), signals "1", "1", and "0" are detected from the signal 2 line (236) and the signal 3 line (237), respectively. Since this signal is different from that of chuck type “1”, CRT
On the screen of (233), the fact that the chuck type of the chuck (5) is different is displayed, the red lamp of the tower light (16) is turned on to notify the operator, and the cylinder (112) and the cylinder (115) are connected. Activate and release the lock of the lock lever (110), and detach the chuck side connector (44) and the main body side connector (117). The operator has a chuck discharge table (10)
If the chuck (5) of the chuck type "1" is removed again, the chuck (5) of the chuck type "1" is mounted on the chuck supply table (68) and the above-described operation for setup change is performed, the correct chuck (5) is obtained. Can be replaced. If there is no function to check the chuck (5) based on the electrical conduction state of the connector, the chuck type (2) is replaced with the chuck type (2) where the chuck type "1" should be replaced as described above. Even if you replace the camera, the recognition camera (1
When 2) recognizes the chuck type identification hole (40) of the chuck (5), the diameter is "1.0 mm" and is not "0.7 mm" of the chuck type "1" to be replaced. Release, disconnection of the connector, and notification to the operator.
Also, when the chuck rail interval due to the recognition hole (4) does not match the substrate size of the NC data, the same operation is performed as when the chuck type is different.

Furthermore, when replacing the chuck (5), the operator does not place the chuck (5) at the correct position on the chuck supply table (68), and the chuck detection sensor (86) operates the chuck detection hole (43) of the chuck (5). Even if the operation key (256) is pressed as described above in a state where no detection is made, the chuck position abnormal signal is output, the rodless cylinder (72) does not operate, and the replacement operation of the chuck (5) is not started. It has been made to. Also, when trying to replace the chuck (5),
When the chuck (5) is still mounted on the chuck discharge table (10) and the chuck (5) is detected by the chuck detection sensor (124), the operation key (256) is exchanged as described above for replacement. ) Is pressed, the rodless cylinder (7
2) does not operate, and the exchange operation of the chuck (5) is not started.

Further, in this embodiment, of the signal 1 pin (244) to the signal 3 pin (246) of the chuck side connector (44), the pins not connected to the common pin (247) are built in the chuck (5) during automatic operation. Output signals from the various sensors are output to the CPU (229) via the interface (232). Immediately after the replacement of the chuck (5), the sensors and the like are not energized and follow the open state. Although these pins (244) to (246) are not shared with the pins for transmitting signals, the pins other than the pins that are short-circuited with the common pin (247) may always be left open.

Furthermore, in this embodiment, when the chuck (5) is replaced, the chuck (5) is pushed out and replaced by the inner pressing piece (69) and the outer pressing piece (70) by driving the rodless cylinder (72). Without using a drive source such as a rodless cylinder (72), first unlock the lock lever (110) and connect the main body side connector (114) to the chuck side connector (4).
4) After removing the chuck, manually pull out the chuck (5) on the XY-θ table (87) to the chuck supply table (68) or the chuck discharge table (10) side, and the chuck supply table (68) A new chuck (5) is placed on the X-Y-θ table (87) by pushing it by hand, sliding it along the supply table guide (71) and the guide (108), and then placing it on the XY-θ table (87). Locking by (110) allows replacement of the chuck (5). However, in this case, it is necessary to provide a stopper for positioning the chuck (5) when pushing the chuck (5) by hand.

(G) Effect of the Invention As described above, the present invention can detect the running out of the material of the cleaning paper, so that the cleaning operation of the screen plate without the cleaning paper can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a screen printing machine to which the present invention is applied.
2 is a plan view of the printing press with the safety door removed, FIG. 3 is a front view of the printing press with the safety door removed, FIGS. 4 and 7 are side views of the chuck, and FIG. , FIG. 6 is a plan view of the chuck, FIG. 8 is a front view of the supply conveyor unit and the chuck, FIG. 9 is a plan view of the supply conveyor unit and the chuck, and FIG. 10 is the chuck and printing in FIG. 11 is a front view of the chuck supply unit, and FIG.
FIG. 16 to FIG. 16 are side views showing the operation of chuck replacement, and FIG.
Figures 19 and 19 are front views of the chuck positioning unit, FIG. 18 is a front view showing a case where the lock lever is released, FIG. 20 is a front view showing a situation where the main body side connector is separated from the chuck side connector, FIG. FIG. 21 is a plan view showing a scene where the main body side connector is separated from the chuck side connector, FIG. 22 is a plan view showing the XY-θ table, FIG. 23 is a plan view of the recognition camera driving unit, and FIG. FIG. 25 is a front view of the recognition camera driving unit, FIG. 25 is a plan view of the printing unit, FIGS. 26 to 29 are front views of the printing unit, and FIG.
FIGS. 31 and 32 are side views of the printing section, FIGS. 32 to 39 are front views showing the printing operation, FIG. 40 is a front view showing the cleaning section, and FIGS. 41 and 45 show the cleaning section. FIG. 42 is a front view in which the cleaning unit is cut away, FIG. 43 is a side view in which the supply roll and the paper feed detection roll in FIG. 41 are removed, FIG. 44 is a plan view of the cleaning unit, and FIG. FIG. 47 is a front view of a cleaning unit for explaining the operation of the paper-out notice, FIG. 47 is a control block diagram of the present invention, FIG. 48 is a diagram showing a chuck-side connector of chuck type “2”, and FIG. FIG. 50 shows data, FIG. 50 shows identification hole data, FIG. 51 to FIG. 53, FIG. 56 and FIG. 57 show CRT screens, FIG. 54 and FIG. It is a front view of a (theta) table and a cleaning part. (20) ... Printed circuit board, (144) ... Screen board, (17
5) Squeegee, (178) Paste solder (coating agent),
(199) ... cleaning paper, (200) ... paper supply roll (supply roll), (203) ... take-up roll, (222) ...
Actuator (means for detecting paper out notice), (226)
... paper out notice switch (paper out notice detection means), (16) ... tower light (notification means), (229) ... CPU
(Determining means), (242) ... paper out notice counter (counter).

────────────────────────────────────────────────── (5) References JP-A-63-158255 (JP, A) JP-A-1-255540 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H05K 3 / 12,3 / 34 B41F 31/00-35/06

Claims (2)

(57) [Claims] 1. A screen printing machine which cleans a lower surface of a screen plate for applying a coating material onto a printed circuit board by a cleaning paper wound around a supply roll and supplied, and winds the paper around a take-up roll for each cleaning operation. In the screen plate cleaning device of the item (1), an out-of-paper notice detecting means for detecting an out-of-material notice of the material of the cleaning paper of the supply roll and outputting an out-of-paper notice signal, and an operator when the out-of-paper notice signal is output from the detecting means. A screen plate cleaning device for a screen printing machine, further comprising a notifying unit for notifying a notice of running out of material of the cleaning paper. 2. A screen printing machine which cleans a lower surface of a screen plate for applying a coating agent onto a printed board by a cleaning paper wound around a supply roll and supplied, and winds the paper around a take-up roll for each cleaning operation. In the screen plate cleaning apparatus of the above, the paper-out notice detecting means for performing the notice detection of the material exhaustion of the cleaning paper of the supply roll and outputting the paper-out notice signal, and the cleaning operation after the paper-out notice signal is output from the detecting means. A screen plate cleaning device for a screen printing machine, comprising: a counter for counting the number of times; and a determination unit for determining that the cleaning paper has run out of material when the counter has counted a predetermined number of times.