JPH04199766A - Screen printing machine - Google Patents

Abstract

PURPOSE:To enable a coating agent to be coated on a printed board positively by performing coating on the printed board with some spacing board so that no coating agent remains on a screen plate. CONSTITUTION:A screen up/down motor 180 is rotated according SCREEN SEPARATE SPEED of NC data, a screen substrate 142 rises, and a screen plate 144 rises and is released while a paste solder of the screen plate 144 does not remain on an end face of a pattern hole which is provided at the screen plate 144 due to friction by a speed which is slower than a substrate 20. In this manner, after coating onto a printed board with a squeegee, a relative moving drive means separates the screen plate and the printed board at a low speed so that no coating agent remains on the printed board, thus enabling the coating agent to be coated on the printed board positively.

Description

DETAILED DESCRIPTION OF THE INVENTION B) Industrial Application Field The present invention relates to a screen printing machine that applies a coating agent on a screen plate to a printed circuit board through the screen plate by moving a squeegee.

(b) Prior Art In this type of screen printing machine, a cylinder is conventionally driven to separate the screen plate from the printed circuit board after the movement of the squeegee.

(c) Problems to be Solved by the Invention However, in the above-mentioned prior art, the speed at which the screen plate is raised is high, especially at the initial stage, and the coating agent that is perforated in the screen plate passes through in order to cope with fine-pitch printing. When the pattern holes become narrower, the viscosity of the coating agent causes the coating agent to remain on the end face of the pattern hole due to friction, resulting in a disadvantage that the coating agent cannot be applied reliably.

Therefore, an object of the present invention is to reliably apply a coating agent to a printed circuit board, regardless of the condition of the pattern holes of the screen plate or the viscosity of the coating agent.

(d) Means for Solving the Problems Therefore, the present invention provides a screen printing machine that applies a coating agent on a screen plate to a printed circuit board through the screen plate by moving a squeegee. a relative movement drive means for relatively moving the screen plate so as to be able to approach and separate the screen plate and the screen plate after coating the printed circuit board with the squeegee so that no coating agent remains on the screen plate when the screen plate and the printed circuit board are separated; and a control means for controlling the relative movement driving means so that the relative movement driving means is kept at a relatively low speed.

(e) After coating the printed circuit board with the action squeegee, the relative movement driving means separates the screen plate and the printed circuit board at a low speed such that the coating agent is applied to the printed circuit board so that no coating agent remains on the screen plate.

Kube) Example An embodiment 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 unit that supplies a printed circuit board (20), which will be described later, from an upstream device, and (4) is a supply conveyor section for supplying a printed circuit board (20), which will be described later, from an upstream device. This is a chi A/vine positioning part that positions the chuck (5) that fixes the chuck (20).

, (6) is a paste solder (described later) on the substrate (20).
178), and (8) is the printing section (6).
This is a discharge conveyor section having a similar structure to the supply conveyor section (2) that discharges the substrate (20) from ). (9) is a chuck supply unit on which a new chuck (5) is placed when replacing the chuck (5), and (10) is a chuck discharge table from which the replaced chuck (5) is discharged.

(11) is a recognition camera drive unit that drives the recognition camera (12). (14) is a cleaning section, (15) is an operation section, (16) is a tower light, and (17) is a safety door. (18) is a door opening/closing sensor that detects opening/closing of the safety door (17).

Next, the chuck (5) will be explained.

In FIGS. 4 to 6, (2o) is a printed circuit board, which is gripped and fixed by a chuck rail (23) provided on a movable wall (21> and a fixed wall (22). 22) is fixed to the chuck base (24), and the movable wall (21) runs parallel to the fixed wall (22) along a guide rail (25) provided on the chuck base (24). The movable wall ( 21), and the screw (27) fixes the movable wall (21) to the guide rod (26).
It is fixed to the chuck base (24).

Pulleys (28) are installed on the fixed wall (22) and the movable wall (21).
are arranged, and a chuck belt (3o) is wrapped around each of them. The pulley (28) at the end of the supply conveyor section (2)
) has a supply side gear (31) pivoted on it, and a pulley (28) at the end on the printing section (6) side has a discharge side gear (32> pivoted on it.The chuck rail (23) It is attached to a chuck roller (36>) fitted in a roller groove (35) bored in a slide plate (34) that slides along a slide plate guide (33).
) is moved along the chuck guide (39) by movement of the chuck cylinder (38>).

The chuck rail (23) is provided with a chuck type identification hole (40) for identifying the type of chuck (5) using a recognition camera (12). The hole (4o) is also used to recognize the chuck rail spacing.

(41) is a plurality of backup bins set up on a backup pin plate (42), and as the backup pin plate (42) is raised and lowered by a cylinder (not shown), the board (2o) is moved up and down as shown by the solid line in FIG. The position where the support is placed on the chuck rail (30) and the upper surface of the board (2o) shown by the two-dot chain line are on the chuck rail (2o).
3) Move up and down between positions that are approximately at the same height as the top surface. (4
3) is a chuck detection hole for detecting whether the chuck (5) is located at the correct position on the chuck supply section (9), and is bored in the chuck base (24). (
Reference numeral 44) is a chuck side connector for electrically determining the chuck type and for energizing various sensors and loads in the chuck (5) from the main body side. Chuck base (
24) is hollowed out in the center, and the inner wall of the base (46)
The formation is deceptive.

There are various types of chucks (5), and the ones explained in Figs. 4 to 6 are of the mechanical clamp horizontal holding type, and are used to hold the substrate (20) supported by the backup bin (41).
is gripped laterally by a chuck rail (23). For example, as shown in Fig. 7, a vacuum suction table (
There is a method called a vacuum suction method in which a substrate (20) supported by vacuum suction (47) is laterally gripped and fixed by a chuck rail (23) having a similar drive structure.

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

In FIGS. 8 and 9, reference numeral (49) is a supply side motor that allows rotation of the drive pulley (50). The pulley (50
) and the transmission pulley (51) is a transmission belt (52).
The belt drive pulley (53) is completely attached to the transmission pulley (51). Belt driven pulley (
53) is pivotally supported by a bobbin shaft (54). A supply belt (57) is allowed to be wrapped around the belt drive pulley (53) and a pulley (56) disposed on the support wall (55), and is driven by the supply side motor (49) to the support wall (55). The fully placed supply belt (57) rotates and the printed circuit board (20
).

58) is a movable support wall, which is movable along the guide shaft (59> and the bobbin shaft (54).The movable support wall (
The belt drive pulley (53) is also attached to the pulley shaft on the 58) side.
4) and the shaft-supported pulley (56).
7) is passed. Among the pulleys (56) on which the belt grip 57) is stretched, the gear drive pulley (60) closest to the chuck positioning part (4>) is driven by a support wall (55) or a movable support wall (58). A gear (62) is pivotally mounted, and a transmission gear (63) meshes with the drive gear (62).

The transmission gear (63) is attached to a swing plate (64) that can swing around the rotation axis of the drive gear (62).
5) is a spring that urges the rocking plate (64) to rotate in the counterclockwise direction in FIG. 8, and (66) restricts the rocking plate (64) from rotating in the same direction. It is a stopper. The transmission gear (62) can mesh with the supply side gear (31) of the chuck (5) that is fixed to the chuck positioning part (4), and the rotation of the supply belt (57) causes the supply side gear (31) to be engaged with the supply side gear (31).
> is rotated.

The discharge conveyor section (8) is also equipped with a mechanism that similarly drives the discharge side gear (32) of the chuck (5).

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

In Fig. 2 and Figs. 10 to 16, (68> is a chuck supply table on which the chuck (5) is placed for exchanging it, and the chuck (5) is pressed inside the chuck (5) on the rigging (68). It is pressed by the piece (69) or the outer pressing piece (70) and transferred to the chuck positioning part (4) side along the supply table guide (71). It is a rodless cylinder for reciprocating movement, and a slider (74) slides along the cylinder (73).A moving body (75) is attached to the slider (74), and the moving body (75) is attached to the slider (74). Pressure piece mounting plate (75) attached to
An inner pressing piece (69) is attached to the tip end of the pressing piece 5), and an outer pressing piece (70) is attached to the rear end thereof so as to be swingable around the pressing piece support shafts (76) and (77), respectively. A stopper rocking plate (79) is further attached to the pressing piece mounting plate (75).

Further, the pressing pieces (69) and (70) are each biased by a spring (not shown) so as to swing counterclockwise in FIG. 12.

A stopper (83) that can swing around a support shaft (82) is provided on the chuck positioning unit (4) side of the chuck supply table (68).
is supported by a shaft and always urged by a spring (not shown) to swing counterclockwise in FIG. (84) is a stopper (
83) is a tilt engaging roller provided at the right end in FIG. 12, and as shown in FIG. 12, it engages with the chuck (5) on the chuck supply table (68) to restrict movement. (85
) is the stopper swing roller, and the rodless cylinder (
When the stopper swing plate (75) moves to the right in FIG. 12 due to the operation of the stopper swing plate (72), the stopper swing plate (75) rides on the swing plate (75) along the tapered portion at its tip and moves the stopper (83) clockwise. Swing the chuck (5) to release the restriction.

(86) is 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 above the sensor (86).

Next, the chuck positioning section (4) will be explained.

In Figures 10 and 12 to 22, (87)
is the chuck (
5) is an X-Y-θ table on which it is placed. The table (87) includes an X table (88) and a Y table (89).
and a θ table (90).

The X table (88) rotates the X nut body (9) by rotating the X screw shaft (95) driven by the X motor (94) along a pair of X guide rails (93) provided on the base (91).
6) in the X direction. X guide rail (93
) is provided with an X-Y-θ table (87) movable in the range from the chuck positioning section (4) to the printing section (6).

The X table (89) is driven by the Y motor (97).
As the screw shaft (98) rotates, it moves in the X direction along a pair of X guide rails (100) provided on the X table (88) via the Y nut body (99).

The θ ball screw shaft (10) is driven by the θ motor (101).
2), the nut body (104) having the roller (103) at one end moves along the screw shaft (102), but the roller (103) is connected to the notch (105) of the θ table (90). The movement of the roller (103) causes the θ table (90
) rotates in the θ direction.

The θ table (90) is provided with a guide (108) that guides the movement of the chuck (5), but the guide (108) on the right side in Fig. 10 is cut out at two places and the θ table (90) is A lock lever (110) for fixing the chuck base (24) is provided so as to be able to swing around the lock lever spindle (109).
0) swings counterclockwise as shown in Fig. 16 when the cylinder (112) provided on the θ table (90) contacts and presses the cam follower (111) provided at the bottom of the cam follower (111) provided at the bottom of the cam follower (111). Lock the base (24). The lock lever (110) is urged by a spring (not shown) to swing clockwise in FIG. 17.

(114) is a connector block attached to a rod (116) of a connector connection cylinder (115) provided on the θ table, and a main body side connector (117) is attached thereto. When the rod (116) is retracted by the operation of the connector connecting cylinder (115), the main body side connector (117) connects to the chuck side connector (44) as shown in Fig. 19.
connected to.

In Figure 22, (118) is the X-Y-θ table -]
1- (87) A table standby position detection sensor that detects the standby position on the supply conveyor section (2) side. This sensor (
11g) may detect the origin in the X direction.

Next, the chuck ejection table (10) will be explained based on FIGS. 2, 10, and 12 to 16.

The chuck discharging table (10) is also provided with discharging table guides (119) on both sides for guiding the movement of the chuck (5) that has been completely pushed out from the θ table (90>).

The chuck ejecting table (10) is further provided with an engaging pawl (123) that is swingable around a support shaft (121) and is always biased counterclockwise in FIG. 12 by a spring (122). The engagement claw (123) is connected to the ejection table (10).
) engages with the inner wall of the base of the chuck (5) transferred onto the
This prevents the chuck (5) from returning in the direction of the chuck positioning section (4). Further, a chuck detection sensor (1) is provided on the chuck ejection table (10) at a position to detect the chuck base (24), and detects the presence or absence of the chuck (5).
24) is provided.

Next, the recognition camera drive section (11) will be explained.

In Figures 2, 3, 23, and 24, (1
26) is the X moving body, and the X camera drive morph (127
) is driven to rotate the X camera screw shaft (128) to move in the X direction along the X camera guide (129) via the nut (129). A Y camera screw shaft (132) which is driven and rotated by a Y camera drive motor (131) is attached to the X moving body (126).
The recognition camera (12) attached to the Y nut body (133) that fits into the screw shaft (132) moves along the Y camera guide (134) also provided on the
32) moves in the X direction to recognize the chuck type identification hole (40), the position of the substrate (20>), and the position of the screen plate (144) to be described later.

A stopper cylinder (136) is further attached to the Y-nut body (133) so as to expand and contract the rod (137) in the vertical direction, and a stopper cylinder (136) is attached to the stopper cylinder holder (138).
) of the chuck positioning unit (4).
The stopper pin (139) that regulates the rod (13
7) are connected at the tip. The stopper pin (13
9) is a Y nut body (1) due to the operation of the cylinder (136).
33> and moves up and down while being guided. A substrate sensor (140) for detecting the substrate (20) is attached to the stopper pin holder (138).

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

In FIGS. 25 to 31, (142) is a screen base, and the screen plate (142) is swingable around a screen support shaft (143) provided on the base (142).
A screen mount (145) is attached to which the screen mount (144) is attached. A screen positioning pin (146) is provided on the screen base (142), and a pair of positioning rollers (147) provided on the screen mount (145).
), the screen mount (145) is positioned and fixed on the screen base (142).

(149) is a squeegee mounting base that can swing around the screen support shaft (143);
5) and is connected to the screen mount (145) by a connecting plate (150). Squeegee mounting stand (1
49) has a stopper (151) and a stopper (152).
is provided, and the stopper (1, 51> is a stopper bolt (153) provided on the screen base (142)
The stopper (152) is in contact with the screen mounting base (1
45), and the screen mounting base (145) and the squeegee mounting base (1
49) with respect to the screen base (142) in the vertical direction is regulated.

The connecting plate (150) is attached to the squeegee mount (149) using the support bolt (156) as a fulcrum.
It is swingably attached by a connecting cylinder (157) provided at 49). An engagement groove (158) is cut out in the connection plate (150), and when the cylinder (157) is operated, the connection plate (150) swings to open the engagement groove (158).
) is fitted to the engagement bolt (159) provided on the screen mount (145) as shown in Figure 30, thereby connecting the screen mount (145) and the squeegee mount (149).
connected to.

A support (161) is erected on the screen base (142), and there is a support shaft (162) at the top of the support (161) and a support shaft (163) provided on the squeegee mount (149). A screen upper and lower cylinder (164) is rotatably mounted around each support shaft (162) (163), and the operation of the cylinder <164) causes the squeegee mount (149) to rotate around the screen support shaft (143). sway around. The connecting plate (150) connects the squeegee mounting base (14).
9) and the screen mount (145) are connected, the screen mount (145) also swings together with the squeegee mount (149) by the operation of the cylinder (164).

The squeegee mounting base (149) is further provided with a squeegee base guide (166), and the squeegee base (167) is movable in the X direction along the guide (166). Decelerator (169) for rotation of printing motor (16g)
The deceleration is transmitted to the driving pulley (17, 0), causing it to rotate, and the squeegee belt (172), which is stretched between the driving pulley (170> and the driven pulley (171)), rotates. The squeegee stand (167) attached to (172) moves.The squeegee stand (167) is provided with a light shielding plate (173), and the origin detection sensor (174) detects the light shielding plate (173). Squeegee stand (
167) is detected.

The squeegee stand (167) has two opposing wooden squeegees (1
75) is guided by a squeegee up and down guide (176) and is mounted to be movable up and down by the operation of a squeegee up and down cylinder (177). As the squeegee descends and moves as shown in FIGS. 32 to 39, paste solder (17
8) is printed on the printed circuit board (20) on the X-Y-θ table (87) through a pattern hole drilled in the center of the screen plate (144).

The base (91) supports the screen base (142) and moves it up and down to attach the screen plate (144) and the printed circuit board (2o).
) are provided with four ball screw shafts (179) for bringing them into contact with each other and separating them from each other. The screen up and down drive pulley (181) is rotated by the drive of the screen up and down motor (180), and the screen up and down driven pulley (bell) (182) and the screen up and down driven pulley (
183) to rotate the screen vertical movement shaft (184). A worm (185) is attached to the rotation shaft (184).
is provided, which engages with the worm wheel (186) provided on the screw shaft (179) and rotates the rotation shaft (18).
4) rotates the pole screw shaft (179).

A bevel gear (187) is provided on the rotating shaft (184), and a bevel gear (188) is attached to a rotating shaft (not shown) provided orthogonally to the rotating shaft (184). The rotation of the rotation shaft (184) is transmitted to the ball screw shaft (179) on the opposite side in FIG. 26 by a similar structure.

The nut (189) provided on the screen base (142) is fitted onto the rotating four-wood ball screw shaft (179), 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 up and down motor (180) moves the screen plate (180) after the paste solder (178) is applied.
144) from the printed circuit board (20),
A servo motor or a pulse motor is used to raise the screen plate (144) at a low speed that prevents paste solder (178) from remaining on the end face of the pattern holes of the screen plate (144).

Next, the cleaning section (4) will be explained.

In FIGS. 40 to 46, (192) is guided by the X guide rail (93) and the screen plate (1
It is a leaning unit that can move below the belt (194) by the belt joint (193).
is joined to. The belt (194) is connected to a drive pulley (196) driven by a cleaning section motor (195).
and a driven pulley (197), and the rotation of the motor (195) causes the cleaning unit (192
) moves. (19g> is the cleaning unit (1
92) is a cleaning origin detection sensor that detects the origin of movement in the X direction.

The cleaning unit (192) is provided with a vapor supply roll (200) that winds the cleaning vapor (199) with its end fixed.
) The cleaning paper (199) supplied from
3) is wound up.

(205) is a winding motor, and a torque limiter (205) is a winding motor.
06) to rotate the take-up drive pulley (207),
A take-up roll (203) is rotated via a take-up belt (208) and a take-up driven pulley (209). When the cleaning paper (199) is completely supplied and the material runs out, the take-up roll (203) stops rotating and a predetermined load is applied to the torque limiter (206). It is designed so that it spins idly.

(211) is a disk that is pivotally attached to the paper feed detection roll (201), and slits (212) are provided at equal intervals on its periphery. When the cleaning paper (199) is wound up by the rotation of the winding motor (205), the roll (201) is rotated by the amount of feed, and the disk (211) is rotated by the amount of feed. The amount of feed of the cleaning paper (199) is detected by detecting the slit (212) through which the cleaning paper (213) passes. The supply roll (200) is clamped by a brake spring (214) with a predetermined force, and brakes the rotation of the supply roll (200) by the take-up motor (205).
05) stops, the supply roll (200) and the cleaning roller (202) are provided at the tip of an arm (217) that can swing around a support shaft (216), and the roller upper and lower cylinders ( The tip of the rod (219), which moves up and down by the operation of the cylinder (218), is connected to the arm (217) via the spring (220), so the cleaning roller (202) moves up and down by the operation of the cylinder (218).
moves up and down. With the roller (202) raised and the vapor (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). It is done.

(222) is an actuator that can swing around a support shaft (223), and is biased counterclockwise in FIG. The cleaning paper (199) that is wound on the
is determined. (226) is a vapor-out warning switch, which activates the actuator (222) when the winding diameter of the cleaning paper (199) reaches a predetermined amount.
ON J Outputs a vapor out warning signal.

Next, the control system will be explained.

In FIG. 47 and FIG. 48, (229) is a CPU that performs various operations related to the printing operation of the printed circuit board (20) of the screen printing machine (1) based on the information stored in the RAM (230). This is done according to the program stored in (231).

(232) is an interface and an operation unit (15);
In addition to connecting the recognition camera (12), CRT (233), various sensors, etc., the signal line 1 (235) and signal line 2 (2
36〉, signal line 3 (237) and common line (2
38). The potential of the common line (238) is set to a low potential "L". The line (235) (23
6) (237) and (23B) are the detection 1 pin (235A) and the detection 2 bin (23
6A), detection pin 3 (237A) and common supply pin <
238A). (239) is a drive circuit.

The RAM (230) has one print operation for the board (20).
A printing counter (240) that counts each sheet, and a cleaning carantuff 241 that counts the number of automatic cleanings.
> and a paper-out notice counter (242) that is subtracted from the set number of times for each automatic cleaning after the paper-out notice signal is output.
After the continuity data in Figure 9, the identification hole data in Figure 50, and the paper out warning signal are output, the paper out warning counter (
242) is set and stored. (243) is a print counter for manual cleaning. "Chuck 1" in FIGS. 49 and 50 corresponds to chuck type "1", and "chuck 2" corresponds to chuck type "2".

Chuck side connector (44) has 1 signal pin (244)
, a signal 2 pin (245), a signal 3 pin (246) and a common bin (247) are provided, and the main unit side connector (11
7) For connection with each detection pin 1 (235A)
, detection 2 bin < 236A), detection 3 pin (237A) and common supply pin (238A). The chuck connector (44) in Figure 47 is of chuck type 1□, and the common bin (247) and signal 2 bin (245) are short-circuited.The chuck connector (44) in Figure 48
is of chuck species “2” and is a common bin (247)
and signal pin 3 (246) are short-circuited.

Next, the operation section (15) will be explained.

The operation unit (15) has a numeric keypad (249) for inputting data.
), cursor keys (250), SET key (251) used to select the CRT (233) screen, etc.
, Teach key (25) to switch to NC data setting mode.
2), a manual key (253) for entering manual operation mode such as home return, automatic key (254) for entering automatic operation mode, and a start key (25) for starting operation.
5), operation key (25) for starting setup change operations, etc.
6) A stop key (257) is provided for stopping the operation.

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

First, when you press the teach key (252), the CRT (233)
The screen displays NCDATAI as shown in Figure 51.
The NFORMAT I ON screen appears. Next, operate the cursor key (250) to set the cursor (258) to 'PCB-002', which is the type of board you want to set, and press the SET key (251).The screen of the CRT (233) will display various data settings. 0PERATION DA
The TA EDIT screen will appear.

Next, the worker operates the numeric keypad (249) etc. to
Enter each data as shown in the screen shown in the figure.

Each data in FIG. 52 will be explained.

'E D I T I N G J indicates the board type currently being set. 'PCB 5IZEJ is data that indicates the size of the board (20) in the X direction and Yi direction in units of "■Y".
E/I) OU B L E ) S E L E CT
J specifies whether the printing operation is a round-trip or one-way operation, and ``IJ indicates a reciprocating operation.'CHUC
K TYPE indicates the chuck type depending on the method of fixing the substrate (20) of the chuck (5), rl indicates the chuck type of the above-mentioned mechanical clamp horizontal holding type, and r2. indicates the type of vacuum suction type chuck.

rSQUEEGEE PRINT AREA is data indicating the printing range of paste solder (178) by squeegee (175) in the Set the position in units of “■,” and select “Lth
In J, the distance from the center of the screen plate (144) to the opposite direction of the squeegee origin is set as the printing end position.
Set in units of J. This makes it possible to print only a portion of the printed circuit board (20).

“5QUEEGEE 5TROKE 0FFSET
IJ is the reference position of the movement of the squeegee (175) in the X direction and the screen plate (144) of the squeegee (175) depending on the angle of the squeegee (175) with respect to the screen plate (144).
) changes the position of the rear end, which is the contact point to ), so this distance data is set to completely print the range to be printed, and is in the unit of "rTfn". “5QUEEGEE 5
TROKE 0FFSET 2J is a squeegee (175
), and when the printing operation in one direction is finished and the printing operation is proceeding in the opposite direction, the squeegee (17
5) Place the squeegee (175) opposite the paste solder (1
78) is distance data for moving to the gathered position, and is set in units of "■". '5QUEE
"GEE 5PEED" is data indicating the moving speed of the squeegee (175) when printing the paste solder (178), and can be set in the unit of 111m/seQ.

'5CREEN 5EPARATE 5PEED'
is data indicating the speed at which the screen plate (144) rises due to the rotation of the screen up/down motor (180) to separate from the board (20), and is 'mm/SQ(!
” unit. By using a servo motor, this data can be set at a slower speed than the rising speed of the cylinder, and the speed can be set arbitrarily depending on the size and shape of the pattern hole of the screen plate (144) or the viscosity of the solder paste. In this example, it can be set to 0.
, 511 m/sec to 1.4 illm/see.

"CLEANING AREA" is data that sets the cleaning range of the lower surface of the screen plate (144) by the cleaning roller (202), and the settings of "Ll" and "L6." are '5QUEEGEE PRINTA RE A.
J (') 8 Gotodo'4M Teal. 'CLEA
NrNG ROLLER5PEED is data indicating the moving speed of the cleaning roller (202) during the cleaning operation, and is set in the unit of 'mm/s@cJ. ' PAPERFEED QUANTITY: Each time the cleaning paper (202) finishes one cleaning operation, the paper (202) is transferred to the take-up roll (2).
03) is data that specifies the timing of the cleaning operation, which specifies the amount of paper feed during winding, based on how many substrates (20) have been printed, and the number of times the substrate (20) has been printed is set.

rAUTOMATIc CLEANING C0UNT
, is data specifying the timing of manual cleaning of the lower surface of the screen plate (144), and the number of automatic cleaning operations is set. If "0." is set, the timing of manual cleaning is not specified based on the number of automatic cleaning operations.

'PCB PRINTING C0UNTJ is data that specifies the timing of manual cleaning of the lower surface of the screen board (144), and the number of times the board (20) is printed (that is, the number of printed boards) is set. "
If "0" is set, the timing of manual cleaning is not specified based on the number of times the board (20) is printed.

Note that the number of times the squeegee (175) is moved may be set and counted by the printing counter (243) every time the squeegee (175) is moved.

The NC data of r PCB-003 is set in the same manner as shown in FIG.

The operation of the above configuration will be explained below.

First, select the board type "PCB 0" on which you will be printing.
The operation of setup change to cope with 02J will be explained. When the teach key (252) is pressed, the CRT screen displays the screen shown in Figure 51, and the current status of the screen printing machine (1) is indicated by the board type 'PCB' as shown in CURRENT.
-001''.

First, the worker presses the screen board (144) of the printing department (6).
Replace with one compatible with 'PCB-002. Then, loosen the screw (27) of the movable wall (21) of the chuck (5) and move the movable wall (21> along the guide rail (25) and guide rod (26) to remove the NCDA of PCB-002.
Store in TA;/', ::Y direction (7) PCB 5
Set the distance between the chuck rails (23) to match IZE "70m". After that, the operator places the chuck (5) on the chuck supply table (68).

At this time, the chuck (5) is in a position where the chuck base (24) is regulated by the supply table guide (71), and the end surface of the chuck base (24) can come into contact with the outer pressing piece (70). will be placed on. At this time, the chuck detection hole (43
) is detected by the chuck detection sensor (86).

Next, while the screen shown in FIG. 51 is displayed on the CRT (233), use the cursor keys (250) to move the cursor (258) to "2" indicating PCB-002 and press the operation key (256). When pressed, the following setup change operation is started.

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

First, the cylinder (112) operates and the lock lever (1
10) as shown in Fig. 17 to Fig. 18 to release the lock of the chuck (5) from the θ table (90), and the connector connecting cylinder (115) is operated to connect the chuck side connector of the chuck (5). (44) and the main body side connector (117) of the table (90) are separated as shown in FIGS. 20 and 21. Then, the X-Y-θ table 87) moves a predetermined distance in the Y direction as shown in FIG.

Next, when the rodless cylinder (72) is actuated, the outer pressing piece (70) moves to the right in FIG. 71). At this time, as the stopper swing plate (79) moves to the right, the taper at its tip engages with the stopper swing roller (83l-5), and the stopper (83) moves toward the support shaft (82). The chuck 5) of chuck type r* is rotated clockwise in FIG. 13 and pressed against the chuck (5), and then the outer pressing piece ( 70) and the inner pressing piece (69) returns to the left side.

At this time, the taber of the inner pressing piece (69) is attached to the chuck base (
24), it swings downward and escapes, and when it returns completely and is released from the engagement of the base (24), it swings upward by a spring (not shown), and the base moves away as shown in Fig. 14. (24) becomes ready to be pressed. Also, the rodless cylinder (72) has returned completely and the stopper swing plate (79)
Even when the chuck (5) is not engaged with the stopper swinging roller (85), the stopper (83) remains swinging downward because the chuck (5) presses the chuck engagement roller (84).

Then, when the cylinder (72) operates again in the right direction in FIG. 14, the inner suppressing piece (69) engages with the base (24) and presses the chuck (5) to the position shown in FIG. move it. At this time, the chuck (5) of "chuck type 12" that was previously on the X-Y-θ table (87) is
- It is pushed by the chuck (5) on the θ table (87) and is discharged to the chuck discharge table (10).

When the chuck (5>) moves on the chuck ejection table (10), the engaging claw (123) has its taber aligned with the base (24).
), but when the ejection of the chuck (5) is completed, it is disengaged from the base (24) and swings upward as shown in Fig. 15 due to the bias of the spring (122). Even if the ejected chuck (5) tries to move toward the X-Y-θ table (87), the engaging claw (123) engages with the base inner wall (46) and the chuck (5) Restrict the movement of people.

After that, the X-Y-θ table (87) moves toward the chuck supply table (68) as shown in Fig. 16 and stops at a position where it can receive the printed circuit board (20) from the supply conveyor section (2). .

Next, the cylinder (112) and the connector connecting cylinder <
115) operates to connect the chuck side connector (44) and the main body side connector (117) from the state shown in FIGS. 20 and 21 to the state shown in FIG. 19, and the lock lever (11
0) from the state shown in Fig. 18 to the state shown in Fig. 17,
Fix the chuck (5) to the X-Y-θ table (87). The chuck (5) is always stopped at a predetermined position by the operation of the rodless cylinder (72).

Next, as a setup change operation, the chuck side connector (44)
A check operation is performed to determine whether the type of chuck (5) according to the potential state of each bin matches that specified in NCDATA of PCB-002. This operation will be explained below.

Main body side connector (117) and chuck side connector (44)
) is connected, signal 1 of the main unit side connector (117)
The line (235>, signal 2 line (236), signal 3 line (237) and common line (238) are connected to the connector (44>) via the bins (235A) (236A) (237A) (238A), respectively. signal 1 bin (2
44), signal 2 pin (245), signal 3 bin (246)
and a common bin (247).

The chuck type of the chuck (5) is “1.
As shown in the figure, common bin (247) and signal 2 pin (245)
) is shorted.

Since the common line (238) is at "L" potential, the potential of signal 2 pin (245) is also "L", but signal 1 pin (244) and signal 3 pin (246) are in an open state. It becomes. For this reason, one signal line (235
) and the signal line 3 (237) are also at the potential "Hl" in the open state.
, and the CPU (229) is connected to the interface (2
32), the signal 1 line (235), the signal 2 line (236), and the signal 3 line (237) in this order.
, r O,.

detect the signal of rl. The CPU (229) compares this result with the continuity data of the chuck type "1" in the RAM (230) and, since they match, determines that the correct chuck (5) has been replaced. Chuck (5)
Initialize the sensor, load, etc. by energizing it through the connector.

Next, a setup change operation is performed in which the type of replaced chuck (5) and the width between the chuck rails (23) are checked using the recognition camera (12), and this operation will be explained.

First, due to the rotation of the X camera drive motor (127), the X
The recognition camera (12) moves in the X and Y directions due to the movement of the moving body (126) in the X direction and the rotation of the Y camera drive motor (131) via the Y camera screw shaft (132) and Y nut body (133). and stops above the chuck type identification hole (40) of the chuck rail (23) of the fixed wall (22>).

Then, the recognition camera (12) images the identification hole (40) and determines the diameter of the identification hole (40) and the recognition camera drive unit (1).
1) The position within is recognized. This chuck (5) is chuck type r1" and the diameter of the identification hole (40) is "0.7
PCB-00 specified by the NC data.
Since the chuck type of 2 is "1", RAM (
The identification hole (40) is determined based on the identification hole data stored in the identification hole (230).
) is 0.7 mm, so confirm that they match = 36-. When it is determined that the replaced 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, the identification hole (40) is imaged and its position within the recognition camera drive section (11) is recognized.

Then, from the position of the recognized re-identification hole (40),
If it is within an acceptable range, the recognition camera (12
) ends the check regarding chuck (5).

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

First, the screen upper and lower cylinders (164) are operating in the retracting direction, and only the screen mount (145) is placed on the screen base (142), but the squeegee mount (167) is The recognition camera (12) is in the state shown in FIG.
) is recognized as the position of the recognition mark (not shown) attached. At this time, the mounting angle of the squeegee (175) has also been adjusted to an appropriate angle.

When the recognition operation is completed, the screen upper and lower cylinders <1
64> is operated in the direction in which it extends, and the squeegee mounting base <149)
swings downward and stops the stopper (151) and the stopper (15
2) come into contact with the stopper bolt (153) and the stopper bolt (154), respectively. Then, the connecting cylinder (15
7) is activated, the connecting plate (150) swings from the state shown in FIG. 31 to the state shown in FIG. 149) Integrated with the H screen mounting base (145). In parallel with these operations, the board type "PCB-0" is conveyed along the conveyor width of the supply conveyor section (2) and the discharge conveyor section (8).
02J board (Y stored in the NC data of 20)
Directional size '79 lllTl: Automatically changed to match J.

In this way, the setup change operation is completed.

Next, paste solder (178) to the printed circuit board (20).
) printing operation will be explained.

As mentioned above, when the setup change to 'PCB 002J is completed, when the operator presses the automatic key (254) and presses the start key (255), the X motor (94) rotates and the X-
The Y-θ table (87) moves to the left side in FIGS. 2 and 3, and the supply side gear (31) of the check 5) is transferred to the transmission gear (63) of the supply conveyor section (2) as shown in FIGS. 8 and 3. Engage as shown in FIG.

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

When the feeding and conveying operation of this substrate (20) is started, the RA
M (230) (7) NC data +7) PCB
5IZE's X Data '100. Then rotate the X camera drive motor (127) and the X camera drive motor (131) to place the substrate (20) in the center position of the chuck (5) in the X direction.
Move the stopper bin (139) to a position where the center of the bottle is stopped. That is, the stopper bin (1) is placed at a position 50 inches away from the center of the chuck (5) in the
39) can move. and stopper cylinder (136
) to lower the stopper bin (139).

In this way, when the printed circuit board (20) is conveyed to the chuck belt (30), the circuit board (20) comes into contact with the stopper bin (139) and is stopped, and the circuit board sensor (140) detects the circuit board ( 20), and based on this detection signal, the CPU (229) stops the supply side motor (49), and the rotation of the chuck belt (30) is stopped.

Next, the printed circuit board (20) which is in contact with the stopper bin (139) and stopped on the chuck belt (30) is fixed by the chuck (5), and this operation will be explained.

First, the backup bin (
Pack-up pin plate (41) is equipped with a large number of
2) rises and the substrate (20) on the chuck belt (30>
) and raise it to the upper position of the chuck rail (23) shown by the two-dot chain line in FIG.

Next, the chuck cylinder (38) is actuated and the roller groove (35) is moved according to the movement of the roller groove (35) in the slide plate (34) by moving the slide plate (34) to the right along the guide (33). The roller (36) inside the chuck (35) moves inside the chuck (5), and the chuck rail (23) to which the roller (36) is fixed moves to the guide rail (2).
5) in the direction of narrowing the chuck rail (23) interval, and grips and fixes the printed circuit board (20). When the fixing operation of the board (20) is completed, the X motor (94)
Due to the rotation, the X-Y-θ table (87) moves in a direction away from the supply conveyor section (2>).

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 X camera drive motor (131) moves the recognition camera (12) onto a positioning mark (not shown) on the board (20), and the position of the board (20) is recognized. . Based on this recognition result and the above-mentioned recognition result of the position of the screen plate (144>), the board (20) is positioned at the center of the screen plate (144) with respect to the screen plate (144).
The Y-θ table (87) is moved along the X guide rail (93) in the X direction by the rotation of the X motor (94).
The Y guide rail (100) moves in the Y direction by rotating the Y guide rail (100).
It moves along the screen plate (144) and stops at the bottom of the screen plate (144).

After that, the rotation of the θ motor (101) causes the θ table (
90) rotates in the θ direction about the θ support shaft (106), and the substrate (20) is completely positioned at the desired position relative to the screen plate (144>).

The reason why the paste solder is applied at the center of the screen plate (144) is to improve the accuracy against printing misalignment.As mentioned above, the chuck (5)
Although it is possible to position the substrate (20) at the center of the screen plate (144) even if the substrate (20) is not fixed at the center of the chuck (5), When fixed, the end of chunk (5) will be
The board (20) is fixed to the center of the chuck (5) because it will hit the mounting base (145) of the screen plate (144).

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

Thereafter, a printing operation of paste solder (178) onto the substrate (20) is performed by moving the squeegee (175), and this printing operation will be explained.

NC data rPRINTING (SINGLE/
D OU B L E ) S E L E CT J
is "1", indicating that the reciprocating printing mode is selected.

-43= The printing motor (168) rotates and the drive pulley (17 (1)
), driven pulley (171), squeegee belt (172)
The squeegee stand (167) moves from the origin position at high speed through the board (20) shown by the solid line in Figure 32 to be printed.
It stops at the position shown by the solid line in FIG. 32, which is the position immediately before. This stopping position is such that the midpoint position between the left and right squeegees (175) (hereinafter referred to as the squeegee reference position) is from the center position of the screen plate (144).
“5QUEEG” to PRINT A REA LIJ
EE 5TROKE 0FFSET Add IJ, ' 5QUEEGEE 5TROKE 0FFSET
This is the stop position at a distance obtained by subtracting 2J, that is, 60111 [11] away from the squeegee origin side (right side in FIG. 32).

Next, as shown in FIG. 33, when the right squeegee (144) is lowered by the operation of the cylinder (177), the printing motor (168) rotates and the squeegee stand (167) moves, causing the squeegee (175) to move down. NC data r 5QUEEGEESPEE up to the position shown by the solid line in Fig. 34
Speed specified by DJ' 50 rrtm/Be~
44-C", move while imprinting the paste solder (17 g) onto the board (20). The squeegee (shown by the solid line in Figure 34)
175), the squeegee reference position is rsQUEEGEE PRI from the center of the screen plate (144).
NT AREA La, t rSQUEEGEEST
This is the distance obtained by adding ROKE 0FFSET t, that is, the position where the squeegee stops on the opposite side of the squeegee origin.

In this way, paste solder (178) is applied to the printed circuit board (20).
) is completed in the forward direction.

Next, the descending right squeegee (175)
The squeegee stand (167) will rise as shown in the figure, and the squeegee stand (167) will
'3QIIIm' indicated by 'EGEE 5TROKE 0FFSET2', the squeegee moves at high speed to the origin side and stops at the position shown by the solid line in Fig. 36, which is the position immediately in front of the gathered solder paste (178). and,
The left squeegee (175) is lowered as shown by the solid line in FIG. 37 by the operation of the cylinder (177).

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

Next, the rotation of the print motor (16B) moves the squeegee reference position from the center of the screen plate (144) to the squeegee origin side.
J4='5QUEEGEE 5TROKEFSET
The squeegee (175) moves N to the position indicated by the solid line in Fig.
It moves at a speed of '5 Q mm/secC' specified by C data (7) rSQUEEGEESPEEDJ, completes the printing of paste solder (178) on the printed circuit board (20) in the backward direction, and prints the paste solder (178) on the printed circuit board (20). Paste solder (
The printing operation 178) is completed.

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

Next, the screen up and down motor (180)
The screen base (142) is raised,
The screen plate (144) transfers the paste solder (1
78) rises to the position shown in FIG. 26 and leaves without remaining on the end face of the pattern hole bored in the screen plate (144) due to friction. At this time, after rising a distance that completely separates the object, the movement may be made to rise at a high speed.

Next, the X-Y-θ table (87) on which the printed circuit board (20) is placed is moved in the Y direction and rotated in the θ direction to a position where the board (20) can be ejected, and the X motor (94)
The rotation moves toward the discharge conveyor section (8), and the discharge side gear (32) 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), releasing the substrate (zO), the backup pin (41> is moved down, and the substrate (20) is placed on the chuck belt (30). After this, the discharge conveyor section (8
) begins to rotate, the chuck belt (30) moves the substrate (
20> and transferred to a discharge conveyor section (8), and the discharge conveyor section (8) discharges the substrate (20) to a downstream device.

Next, due to the rotation of the X motor (94), the x-y-θ table (87> is moved toward the supply conveyor section (2), and the supply side gear (31) is moved toward the supply conveyor section (2) in the same manner as described above. transmission gear (63) of the supply side motor (4).
9) rotates and the supply bell l-(57) feeds the next substrate (20
) and transfer the substrate (20) onto the chuck belt (30).

Then, in the same manner as described above, the board (20) is fixed and positioned below the screen board (144), completing the movement from the position shown in Figure 39 to the position shown in Figure 32.
Immediately, the right squeegee (175) descends, and thereafter printing is performed in the same manner as described above, and the print counter (240)
is incremented to "2".

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

In this way, the number of times the substrate (20) is printed is counted by the print counter (1).
44) Automatic cleaning operation of the lower surface is performed. When the print counter (240) reaches the set value, it is cleared and becomes "0". This automatic cleaning operation will be explained.

When the printed substrate (2o) is discharged as described above, the X-Y-θ table (87) is moved toward the supply conveyor section (2) by the rotation of the X motor (94), and is moved to the table standby position. It stops at the position detected by the detection sensor (118). This position is also the position where the transmission gear (63) of the supply conveyor section (2) and the supply side gear (31>) engage.The detection sensor (118) is located on the X-Y-θ table (
87), the cleaning origin detection sensor (198) located below the discharge conveyor section (8) as shown in FIG.
The X-Y-θ table (87) detected by
2) The rotation of the belt (194) caused by the rotation of the rotating unit motor (195) moves the belt (194) along the X guide rail (93) to below the screen plate (144). If the table standby position detection sensor (118) does not detect the X-Y-θ table (87), the cleaning unit (1
92) is configured not to move in the X direction, and the X-Y-θ table (87) is configured not to move in the X direction unless the cleaning origin detection sensor (118) detects the cleaning unit (192). has been made.

Next, the roller upper and lower cylinders (218') operate, and the arm <217) swings upward about the support shaft (216), causing the roller (202') around which the cleaning paper (199) is wound to move.
) comes into contact with the lower surface of the screen plate (144) as shown in FIG. 55 while being biased by the spring (220). The contact position of this roller (202) is rCLEAN of NC data.
Since 'L,=65J' is specified in 'ING AREA', the position is a distance '55+nm from the center of the screen plate (144) to the discharge conveyor section (8) side.

With the roller (202) moving upward and the cleaning paper (199) in contact with the screen plate (144>), the cleaning part motor (1, 95) rotates, and the cleaning part motor (1, 95) rotates as set in the NC data "CLEANING ROLLER5PEED". Speed of '5011m/see Roller (2
02) runs and wipes the lower surface of the cleaning paper (199) and the cleaning plate (144). The roller (
202) is the NC data (7) rcLEANING from the center of the screen plate (144) to the supply conveyor section (2) side.
The distance specified in “A REA Lg” is “65iIITl”.
, the motor (195) stops after traveling from the center of the screen plate (144) until .

Here, the cleaning paper (199) wound around the roller (202) is wound onto the take-up roll (203) by rotation of the take-up motor (205). The cleaning paper (199) is supplied from the supply roll (200) and is wound onto the take-up roll (203) via the roller (202) while rotating the paper feed detection roll (201) without slipping. The sensor (213) detects the slit (212) of the disk (211) attached to the end of the paper feed detection roll (201), and the NC data rPAPERFE is detected.
5l- Feed amount r15 set in ED QUANTITYJ
When it is detected that I+IIIJ has been fed, the rotation of the take-up motor (205) is stopped.

Next, the cleaning unit motor (195) rotates, and the cleaning unit (192) moves the cleaning paper (199) to the screen plate (
144) Move while wiping the bottom surface and remove the roller (202).
is the discharge conveyor section (8) from the center of the screen plate (144).
) side when it reaches a position of distance "65mm". Then, the roller upper and lower cylinders (218) are actuated, the arm (217) swings downward, and the roller (202) moves away from the lower surface of the screen plate (144) and descends.

Next, apply cleaning paper (199) in the same manner as above.
After being wound up on the take-up roll (203), the cleaning unit (192) moves to a position where it can be detected by the cleaning origin detection sensor (198) on the discharge conveyor section (8) side. In this way, when the automatic cleaning operation is completed, the cleaning counter (241) counts the number of times rl of automatic cleaning.

While the above cleaning operation is being performed, the next substrate (20) is transferred from the supply conveyor section (2) to the chuck belt (
30) and is gripped and fixed by the chuck rail (23) in the same manner as described above, but after the automatic cleaning operation is completed, the cleaning origin detection sensor (1
98) detects the cleaning unit (192), the X-Y-θ table (87)
93) below the screen plate (144),
The substrate (2o) is positioned, and paste solder (178) is printed in the same manner as described above.

The above operation is repeated and the cleaning counter (2
41) CANC data (7)'AUTOMATI CC
When LEANING C0UNTJ reaches "12", an operation for manual cleaning is performed.

That is, when the cleaning counter (241) reaches "12" and the cleaning unit (192) moves and is detected by the cleaning origin detection sensor (198), the connecting plate (150) engages with the engagement bolt (159). With the squeegee mount (149) and screen mount (145) connected to the -154~ body, install the screen upper and lower cylinders (164).
operates, and the screen plate (144) and screen base (
142) opens as shown in FIG. 29, and the cleaning counter (241) is cleared. After this, although the power is on, all motors and cylinders are not driven and their current positions are maintained. In this case, the next board (20) is fixed to the chuck (5) and the recognition camera (20) of the board (20)
12) has been completed. and,
The yellow lamp of the tower light (16) flashes to notify the operator that it is necessary to manually clean the lower surface of the screen board (144). At this time, CRT <
233) also displays that the screen board (144) is ready for manual cleaning.

Next, when a worker comes and opens the safety door (17), the door open/close detection sensor (18) detects this and turns off the yellow lamp of the tower light (16), but the power remains on. CPU
(229) does not issue a command to drive the motors and cylinders, but the rotational position of each motor and the state of each cylinder are stored in RAM (230).

Further, the operation unit (15) does not accept any operations other than checking the CRT screen or turning off the power. In this state, the operator manually wipes and cleans the lower surface of the screen plate (144).

When the cleaning is finished, the operator closes the safety door (17) and presses the start key (255'). After the sensor (18) detected that the safety door (17) was closed, the start key (255) was pressed, so the CPU (229) activated the screen upper and lower cylinders (164) to close the screen plate (144). is closed against the screen base <142) to the state shown in FIG. However, it is assumed that there is no substrate (20>). Then, the X-Y-θ table (87) is moved below the screen plate (144), the positioning as described above is performed, and the printing operation is performed.

Although the above operation is repeated, ' PCB-002
When the printing of the substrate (20) is completed, the screen printing machine (1) is stopped. Print motor (168
) and all other drive sources have returned to their original positions.

Next, the printing operation for the PCB 003J board (20) is to be performed, but first a setup change is performed.The operator presses the teach key (252) and presses the screen board (144) as described above. was replaced with that of 'PCB-003', and the chuck (5) with chuck rail width adjusted to '2t) □mm for 'PCB-003.' was placed on the chuck supply stand (68) in the same manner as described above. After that, on the CRT (233) screen in Figure 56, rPCB-
Place the cursor (258) on "3°" indicating 003J and press the activation key (256). Then, 'PCB-0
The same setup change operation as in case 02 can be executed.

In this case, first the connector connecting cylinder (115) operates and the chuck side connector (44) connects the main body side connector (1
17), the chuck side connector in this case (
44), the common pin (247) and the signal bin (245) are short-circuited as shown in Figure 48, and the other pins are in the open state, so the signal 1 line (235) and the signal 2 line (
236) and signal line 3 (237) are "1""1."
0" and matches the data shown in Figure 49 of chuck type "2" in the NC data of PCB 003J -56=, so the sensor, load, etc. of chuck (5) are not energized through the connector. stomach .

Be initialized.

Then, the chuck type identification hole (40) is recognized by the camera (12).
) recognizes that the hole diameter is 1.0I11'IIJ, and confirms that it matches the data shown in Figure 50 for chuck type "2" shown in the NC data of PCB 003J. . Thereafter, the setup change operation continues in the same manner as in the case of 'PCB-002'.

Then, press the automatic key (254>) and then press the start key (
255), the printing operation of the paste solder (178) onto the board (20) is started in the same manner as described above.

'The board (20) of PCB-003 is shown in Figures 32 to 3.
This is shown by the two-dot chain line in Figure 9, and is RAM (230
) NC data rSQUEEGEE PRINT
AREA, is 'L+=150,,'L,=150
'', the printing motor (168) rotates and the squeegee (175) moves at high speed and 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 to 'LQ=15
0J, the NC data "5QUEEGEE 5PEED,
4' Move while pressing the screen plate (144) at a speed of 80nwn/5ecJ to print paste solder (17g>) on the substrate (20) shown by the two-dot chain line.

Next, the descending right squeegee (195)
'5QUEEGEE of NC data by moving upward as shown in the figure.
The distance indicated by ``5TROKE 0FFSET 2''
30m1Tl'' at high speed and stops at the position shown by the two-dot chain line in FIG.

After this, as shown in Fig. 37, the left squeegee (175) indicated by the two-dot chain line descends and the '5QUEEGE E
PRINT A REA'J' L+= 15
o J, it moves at a speed of 80 an/see J to the position indicated by the two-dot chain line in FIG. 38, and the printing of the paste solder (178) in the backward direction is completed. and,
As shown by the two-dot chain line in Figure 39, the squeegee (175
〉 will rise.

Then, as in the case of 'PCB 002J' described above, the screen plate (144>) rises and separates from the substrate (20), and the substrate (20) is discharged by the discharge conveyor section (8).

Next, paste solder <178> is printed on the next board (20) in the same manner as described above.
20) is completely positioned below the screen plate (144), 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.

After that, 'AUT of NC data of PCB-003
OMATIC CLEANING INTERVAL The 10th board (20
) When the printing operation of paste solder (178) is completed, 'CLEANING AREA, data' L+
=165J, the range indicated by ``lt='165'' is '
CLEANING ROLLER5PEED, speed '70s/sec shown in data, 1PCB-OO
Automatic cleaning is performed in the same manner as in case 2.

・And PCB PRINTING COUNT
Since "50." is set in the counter (243).
) PCB-0
In order to manually clean the lower surface of the screen plate (144) in the same manner as in case 02, the screen upper and lower cylinders (164) are operated to lift the screen plate (144). Next, cleaning is performed by the operator, and the printing operation is continued by pressing the start key (255).

The above operation can be repeated, but the cleaning paper (199) is removed each time the automatic cleaning operation is performed.
is wound up on the take-up roll (203), and is wound on the supply roll (20
The winding diameter of the paper (199) wound on the paper (199) gradually decreases. Paper (199) on supply roll (200)
) becomes smaller, the actuator (222) rotates around the support shaft <223> due to the bias of the spring (225), and reaches the position indicated by the two-dot chain line in Fig. 46 at =60.
= Turn the notice switch (226) ON, L, and output a paper-out notice signal.

The CPU (229) turns on the yellow lamp of the tower light (16) based on the paper-out warning signal, and also turns on the CRT.
A paper out warning is displayed on the screen of (233). Then, the number of times automatic cleaning is possible is set to "5" in the paper-out notice counter (242>).After that, if the paper is not replaced, the counter (242) is set for each automatic cleaning.
Subtract and proceed. At this time, the possible number of times stored in the counter (242) may be displayed on the screen of the CRT (233). Automatic cleaning is performed five times after the paper out warning is issued, and when the counter (242) reaches 0, the yellow lamp of the tower light (16) blinks and the printing operation stops.At the same time, the CRT (233) screen An indication that the paper is out is displayed.At this time, the cleaning unit (192) may be placed on standby at a position where it can be easily replaced.

Next, the worker 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 opening/closing detection sensor (18) detects that the safety door has been opened, the excitation of each motor is cut off, making it impossible to know the rotational position of each motor. Let's do it.

For this purpose, first press the manual key (253') and move the cursor (25g) on the MANUAL 5ELECTION screen in Figure 57 to select RETURN 0PERAT.
When the operation key (256) is pressed in accordance with ION, each motor and cylinder return to their origin. After this, press the automatic key (254) and press the start key (255).
When pressed, the printed circuit board (20) is conveyed to the supply conveyor section (2) and the above-described printing operation is performed.

Further, if the cleaning paper (199) is replaced while the paper out warning is being displayed, the operator presses the stop key (257) to stop the printing operation. At this time, the board (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 full door (17) is opened and the paper out display is displayed, and the automatic printing operation is restarted.

In addition, to detect paper out, use cleaning paper (199
) is wound up to the end, and then the end is fed to the supply roll (200
), the torque limiter attached to the output shaft of the take-up motor (205)
(206) receives a predetermined load and cuts out.
5) idles, but this can also be done by not rotating the disc (211) and causing the sensor (213) to not detect the amount of feed of the cleaning paper (199).

Furthermore, if the torque limiter (206) is not provided and the cleaning paper (199) is cut at any position, the paper feed detection roll (201) will not rotate and therefore the feed amount detection sensor (213) will not rotate. Although it is not detected that the paper is being fed, the take-up motor (205) is rotating. Or cleaning paper (199)
If the end of the paper (199) is not fixed to the supply roll (200) and the paper (199) is fed to the end, the feed amount detection sensor (213) will not detect that the paper is being fed, but the paper will continue to roll. The take-up motor (205) is rotating. Therefore, if the torque limiter (206) is not provided and the feed amount detection sensor (213) does not detect that the paper is being fed and the take-up motor (205) is rotating, C
P U (229) may determine that the cleaning paper (199) is out of material.

In addition, a preset number of times automatic cleaning is possible is stored in a paper-out notice counter (242), and the counter is stored for each automatic cleaning operation after a paper-out notice signal is output by turning the notice switch (226) ON. (242) may be subtracted, or alternatively, the counter (242) may be set to 0 and the counter (242) may be incremented each time an automatic cleaning operation is performed after the warning signal is received. You may run out of paper when you reach the maximum number of times.

Furthermore, the number of times that automatic leaning is possible after the paper run-out notice is given is determined by memorizing the remaining distance of the cleaning paper (199) when the notice switch (226) is turned "ON".
ITYJ may be calculated from the set paper feed amount.

Also, when replacing the chuck (5), 'PCB-002'
In 'CHUCK TYPE, data is rl'
The chuck (5) of chuck type ``1'' was supposed to be replaced with the chuck (5) of chuck type ``1'' at When the activation key (256) is pressed as described above, the chuck (5) is transferred onto the X-Y-θ table (87), and then locked by the lock lever (110) and connected to the chuck side connector (44). and the main body side connector (117) are connected. Then, the signal pin 3 (246) is r L , and the signal pin 1 (244) and the signal pin 2 (245)
Since the lines are open, the signals "J r " J r 'OJ are detected from the signal 1 line (235), the signal 2 line (236), and the signal 3 line (237), respectively. Since this signal is different from that of chuck type 11, it is displayed on the CRT (233) screen that the chuck type of chuck (5) is different, and the red lamp of the tower light (16) is lit to notify the operator. At the same time, the cylinder (112) and the cylinder (115) are activated to unlock the lock lever (110) and disconnect the chuck side connector (44) and the main body side connector (117). The operator removes the chuck (5) from the chuck discharge table (1o), places the chuck (5) of the chuck type "IJ" again on the chuck supply table (68), and performs the setup layering described above. You can replace the chuck (5) with the correct chuck (5) by performing the following operations.If there is no function to check the chuck (5) based on the electrical continuity state of this connector, the chuck type r1 as described above Even if you replace the chuck (5) of chuck type R2. when it should have been replaced, when the recognition camera (12) recognizes the chuck type identification hole (40) of the chuck (5), the diameter '1.
'Omn' and 'Q' of chuck type '1' to be replaced,
Since it is not 71TImJ, unlock it in the same way,
Disconnect the connector and notify the operator. Further, even when the chuck rail spacing determined by the identification holes (40) does not match the substrate size of the NC data, the same operation as when the chuck types are different is performed.

Furthermore, when replacing the chuck (5), the operator must
5) is not placed in the correct position on the chuck supply table (68) and the chuck detection sensor (86) is not detecting the chuck detection hole (43) of the chuck (5). ) is pressed, a chuck position abnormality signal is output, the rodless cylinder (72) does not operate, and the chuck (5) replacement operation is not started. In addition, when trying to replace the chuck (5), the chuck (5) is still on the chuck ejection table (10).
) and the chuck (5) is detected by the chuck detection sensor (124), even if the actuation key (256) is pressed down as described above for replacement, the rodless cylinder (72) It does not operate, and the chuck (5) replacement operation does not start.

Furthermore, in this embodiment, among the signal pin 1 (244) to signal pin 3 (246) of the chuck side connector (44), the pins that are not connected to the roller 7-mon bin (247) are connected to the chuck (5) during automatic operation. ) is sent to the CPU via an interface <232).
(229), but immediately after the chuck (5) is replaced, these sensors are not energized and are in an open state, but these pins (244)
) to (246) may be kept open at all times except for the pins that are not shared with the signal transmitting pins and are short-circuited to the common pin (247).

Furthermore, in this embodiment, when replacing the chuck (5), the inner suppressing piece (
69) and the outer pressing piece (70) to push out the chuck (5) and replace it, but without using a drive source such as a rodless cylinder <72), first unlock the lock lever (110>) and remove the main body side connector. (114) from the chuck side connector (44), then manually remove the X-Y-
Pull out the chuck 5) on the θ table (87) to the chuck supply table (68) or chuck discharge table (10> side, place a new chuck (5) on the chuck supply table (68), and push it by hand. Guide (71) and guide (10
8) and slide it along the X-Y-θ table (87).
The chuck (5) can be replaced by placing it on top and locking it with the lock lever (110). However, in this case, it is necessary to install a stopper for positioning the chuck (5) when pushing it in by hand.

(G) Effects of the Invention As described above, according to the present invention, since the coating agent can be applied to the printed circuit board without leaving any coating agent on the screen plate, the coating agent can be reliably applied to the printed circuit board.

[Brief explanation of the drawing]

FIG. 1 is a front view of a screen printing machine to which the present invention is applied;
Figure 2 is a plan view of the printing machine with the safety door removed, Figure 3 is a front view of the printing machine with the safety door removed, Figures 4 and 7 are side views of the chuck, and Figure 5 is the chuck. , FIG. 6 is a plan view of the chuck, FIG. 8 is a front view of the supply conveyor section and chuck, FIG. 9 is a plan view of the supply conveyor section and chuck, and FIG. 10 is a plan view of the chuck and printing in FIG. 2. FIG. 11 is a front view of the chuck supply section,
12 to 16 are side views showing the chuck exchange operation, FIGS. 17 and 19 are front views of the chuck positioning section, and FIG. 18 is a front view showing the situation where the lock lever is released.
Fig. 20 is a front view showing the main body side connector separated from the chuck side connector, Fig. 21 is a plan view showing the main body side connector separated from the chuck side connector, and Fig. 22
23 is a plan view of the recognition camera drive section, FIG. 24 is a front view of the recognition camera drive section, FIG. 25 is a plan view of the printing section, and FIG. 26 is a plan view showing the X-Y-θ table. Figures 29 to 29 are front views of the printing section, Figures 30 and 31 are side views of the printing unit, Figures 32 to 39 are front views showing printing operations, and Figure 40 is a front view showing the cleaning unit. Figure, No. 41
45 and 45 are side views showing the cleaning section, and FIG.
The figure is a cutaway front view of the cleaning section, and Figure 43 is the fourth section.
FIG. 1 is a side view with the supply roll and paper feed detection roll removed; FIG. 44 is a plan view of the cleaning section; FIG. 46 is a front view of the cleaning section for explaining the paper-out notice operation; FIG. 47 is a side view of FIG. is a control block diagram of the present invention, FIG. 48 is a diagram showing the chuck side connector of chuck type R2, FIG. 49 is a diagram showing continuity data, FIG. 50 is a diagram showing identification hole data, and FIGS. Figures 53, 56 and 57
The figure shows the CRT screen, and Figures 54 and 55 show the X-
It is a front view of a Y-theta table and a cleaning part. (20)...Printed circuit board, (144)...Screen board, (175)...Squeegee, (178)
... Paste solder (coating agent), (180) ... Screen up and down motor (relative movement drive means), (229
)...CPU (control means).

Claims (1)

[Claims] (1) In a screen printing machine that applies a coating agent on a screen plate to a printed circuit board via the screen plate by moving a squeegee, a relative movement drive that relatively moves the screen plate and the printed circuit board so that they can come into contact with each other. and a control means for controlling the relative movement driving means so that when the screen plate and the printed circuit board are separated after coating the printed circuit board by the squeegee, the relative movement driving means is kept at such a low speed that no coating agent remains on the screen plate. A screen printing machine characterized by being equipped with.