JPH03295290A - Adhesive applicator - Google Patents

Abstract

PURPOSE:To enable an applying head to cope with component parts different in size and mounting space without being replaced with another applying head different in nozzle space when adhesive agent is applied onto the component parts concerned by a method wherein an applying nozzle is moved relative to other applying nozzles and fixed. CONSTITUTION:When machine screws 36 and 36 are loosened, the upsides of slide blocks 33 and 33 are separated from the underside of a guide groove 38, and the slide blocks 33 and 33 are movable sliding along the guide groove 38. The machine screws 36 and 36 are made to move along long holes 35 and 35, and when applying nozzles 15 and 15 become separate from each other by a required distance, the machine screws 36 and 36 are tightened. As mentioned above, the space between applying nozzles 15 and 15 is adjusted. Then, a distance between stopper pins 43 and 43 provided to a applying head 9 and the applying nozzles 15 and 15 is so adjusted as to enable the stopper pins 43 and 43 not to bear against adhesive agent applied onto a printed board or adhesive agent discharged from the applying nozzles 15 and 15.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a coating device for coating a printed circuit board with adhesive contained in a syringe through a plurality of coating nozzles provided in a coating head.

(b) Prior Art A coating device of this type is disclosed in Japanese Patent Publication No. 56638/1983. According to the prior art, two coating nozzles are provided in the coating head, and the adhesive is applied to two points on the printed circuit board at the same time. However, in the above-mentioned conventional technology, the positions of the two application nozzles are fixed, and if you want to change the distance between the two positions of the adhesive applied simultaneously according to the parts to be mounted by the component mounting device, you can change the position of the application head. The disadvantage is that it must be replaced.

(c) Problems to be Solved by the Invention Therefore, the present invention aims to eliminate the need to change application heads with different nozzle spacings when applying adhesive to parts of various sizes. purpose.

(d) Means for Solving the Problems Therefore, the present invention provides a coating device that applies adhesive in a syringe to a printed circuit board through a plurality of coating nozzles provided in a coating head. at least 1
The book is made movable and is provided with a fixing means for fixing it at an arbitrary position relative to other nozzles.

(9) After at least one coating nozzle is moved relative to the other coating nozzles, the fixing means fixes the nozzle at an arbitrary position relative to the other nozzles.

(f) Example An embodiment of the present invention will be described below based on the drawings.

In Figures 5 and 7, (1) is a printed circuit board (2
) is placed on it, moves in the X direction by the rotation of the X-axis motor (4), and moves in the X direction by the rotation of the Y-axis motor (6). (7) is the XY child table 1)
This is a dispenser unit having an application head (9) for applying an adhesive (8) to a printed circuit board (2) placed thereon.

(10) is a supply conveyor that transports and supplies the printed circuit board (2), and (11) is a discharge conveyor that transports and discharges the board (2). (12) is a printed circuit board (2
) is used to transfer the substrate (2> on the supply conveyor (10) onto the XY child table 1),
The board (2) on the XY child table 1) is transferred to the discharge conveyor (1).
1) Place it on top. On the printed circuit board (2), rectangular chip components such as resistors and capacitors of various sizes (not shown) are mounted by a downstream component mounting device (not shown) in accordance with the positions of the fully applied adhesive (8). That will happen.

Hereinafter, the dispenser unit (7) will be described in detail based on FIG. 7.

A syringe (14) filled with adhesive (8) is provided at the top of the application head (9), and the application head (9) is provided with a syringe (14) filled with adhesive (8).
) The adhesive (8) is discharged from two application nozzles (15) (15) provided at the bottom of the syringe (14) and communicating with the syringe (14). An air hose (16) is attached to the syringe (14) for feeding compressed air in order to discharge the adhesive (8) from the nozzles (15) (15). (17)
is a vertically moving lever rotatably supported by a support member (19) via a support shaft (18), and a roller (2o) at one end
is fitted between seven pairs of locking parts (21) (21") provided on the upper part of the coating head (9), and is fitted between the roller (22") at the other end.
) is urged by a spring (23) so as to come into pressure contact with the drive cam (24). The cam (24) is rotated by a vertical motor (26).

Further, the application head (9) is fitted into a gear (27) and meshed with a gear (3o) rotated by a rotary gear motor (29). Rotating gear motor (29) and gear (3o
) is fixed to the printed circuit board (2) without moving up and down, and the gear (27) meshes with and rotates while moving up and down with the gear (3o).

The coating head (9) will be described in detail based on FIGS. 1 to 4.

(32) is a nozzle body attached to the lower part of the syringe (14). (33) is a slide block to which a coating nozzle (15) is attached at the bottom. The nozzle body (32
) has a slotted hole (3) in the flange (34).
The screw (36) inserted from above the flange (34) through the screw (36) is completely screwed into the screw hole drilled on the top surface of the block (33), so that the block (33)
is a guide groove (
38) is fixed within. A pair of the elongated holes (35) are provided at both ends of the flange (34), and the pair of blocks (33) (33) are attached to the nozzle body (32), and the longitudinal direction of the elongated holes (35) is The block (33) is parallel to the longitudinal direction of the guide groove (38), and when the screw (36) is loosened, the block (33) is movable along the guide groove (38), and the screw (36) can be moved at any position. ) Can be fixed by tightening.

The discharge port (39) of the nozzle (15) passes through the upper surface of the block (33), and the lower surface of the guide groove (38), which the upper surface of the block (33) abuts, has the respective blocks (33). Openings (40) (40) are provided with a size that allows communication with the discharge port (39), respectively, within the movement range of. Further, the upper surface of the block (33) is fixed in close contact with the lower surface of the guide groove (38), and is notched to prevent the adhesive (8) from leaking. Furthermore, a gasket or the like may be used to increase adhesion. The guide groove (38) is connected to the nozzle body (32).
) is carved across the center of the lower surface (the center approximately coincides with the center of rotation of the coating blade (9)), and the distance between the pair of coating nozzles (15) (15) is set at a predetermined distance. It can be made variable within a range.

In this embodiment, as shown in FIGS. 1 to 3, the opening (40)
The opening (40) is larger than the outlet (39) of the nozzle (15), but if it is open so that it communicates with the opening (40).
) and the discharge port (39) may be in any size relationship, however, if the opening (4o) is made smaller and the discharge port (39)
) The movable range of the slide block (33) is expanded by increasing the size of the slide block (33) side.

(42) is a coating nozzle (15) that comes into contact with the printed circuit board (2) when applying the adhesive (8) to the printed circuit board (2).
〉 is a bottle slide block provided with a stopper pin (43) at the bottom thereof to regulate the position so that it maintains a constant distance from the top surface of the substrate (2). The lower surface of the nozzle body (32) is further carved with a pin guide groove (44) that is perpendicular to the guide groove (38) and crosses approximately the center of the lower surface, and the pin slide block (42) is connected to the slide block (33). ) is movably fixed in the guide groove (38) using a screw (45) in the guide groove (44) through the long hole (46) whose long direction is parallel to the groove (44). It is fixed movably along the groove (44). In this way, the distance between the stopper pins (43>(43)) is also variable, and the distance to the coating nozzles (15) (15) is variable.

The operation of the above configuration will be explained below.

Parts (not shown) are placed on the printed circuit board (2) using the coating head (
The adhesive (8) is applied to two points using the two application nozzles (15) (15) installed in 9), and the distance between these two application positions can be adjusted depending on the part. In order to obtain a
5) It is necessary to set the spacing between the parts according to the parts. In addition, a stopper pin (4) provided on the application head (9)
3) The distance between the stopper pins (43) and the application nozzles (15) (15) is also such that the stopper pins (43) (43) have already applied the adhesive (8) to the printed circuit board (2). 15) It is necessary to position the adhesive (15) so that it does not come into contact with the adhesive (8) being discharged.

First, adjustment of the interval between the coating nozzles (15) (15) will be explained. When the screws (36 bars 36) are loosened, the top surface of the slide blocks (33) (33) aligns with the guide groove (38).
) away from the bottom surface of the slide block (33) (33)
can be slid along the guide groove (38). While moving the screw (36) (36) along the long holes (35) (35), slide both slide blocks (33) (33) until the distance between the nozzles (15) (15) is the desired one. If it does, tighten the screws (36) (36).

In this way, adjustment of the interval between the coating nozzles (Is) (15) is completed.

Next, adjustment of the distance between the stopper pins (43) (43) will be explained.

When the screws (45) (45>) are loosened, the top surface of the pin slide blocks (42) (42) will be separated from the bottom surface of the pin guide groove (44), and the pin slide blocks (42) (42) will move away from the pin guide groove (44). While moving the screws (45) (45) along the long lengths (46) (46), both pins and slide blocks (42) (4
2) and when the desired distance between the stopper pins (43) and (43) is reached, tighten the screws (45) and (45).

After this, the operation of applying the adhesive (8>) to the printed circuit board (2) is performed.First, the printed circuit board (2) is conveyed to the supply conveyor (10), and the transfer unit (
12), it is transferred to and placed on the XY child table 1). Then, the X-axis motor (4) and the Y-axis motor (6)
is rotated and the XY child table 1) is moved so that the application head (9) is located at the desired position on the printed circuit board (2), and the rotation gear motor (29) is rotated to position the coating head (9) at the desired position on the printed circuit board (2).
The application head (9) is rotated to a desired angular position via the gear (30).

Next, the drive cam (2) is rotated by the vertical movement motor (26).
4) is rotated and moved up and down via the roller (22), and the bar (17) is rotated counterclockwise in FIG. 3 around the spindle (18) by the biasing force of the spring (23). Laura (20)
The coating head (9) is connected to the gear (
27) descends while sliding on the gear <30). At this time, the adhesive (8) in the syringe (11) is already applied to the nozzle body (32) by compressed air via the air hose (16).
) openings (40) (40) and discharge ports (39) (39)
When the stopper pins (43) (43) come into contact with the printed circuit board (2), a certain amount of adhesive (8) is discharged through the application nozzle (15). (15) Coated on the substrate (2) at intervals of (15).

Then, when the vertical movement motor (26) further rotates, the vertical movement lever (17) rotates clockwise, and the application head (
9) rises and the coating operation ends.

The above coating operation is performed on the specified position of the printed circuit board (2), but the stopper pins (43) (43)
The distance between the stopper pins (43) (43) and the application nozzles (15) (15) is adjusted to a predetermined distance so that the distance between the stopper pins (43) (43) and the application nozzles (15) (15) is appropriate. 43) (43) will not come into contact with each other, and the adhesive (8) discharged by the application nozzle (15) (15) will not touch the stopper pin (43) (43).
There is no chance of it coming into contact with.

In the first embodiment described above, the stopper pin (43) is provided on the pin slide block (42) and the bottle (43) (4
Although the structure described in 3) can be made variable, a second embodiment in which the spacing between the stopper pins can be made variable using another structure will be described below.

In Figures 8 and 9, (60) is a notch (61)
are a pair of mounting pieces provided in the middle part and facing the lower part of the nozzle body (62), and the respective stopper pins (63) inserted into the respective notches (61) are sandwiched from both sides. The mounting piece (60) and the stopper pin (63)
It is fixed by a bolt (64) and a nut (65) passing through it. At this time, the mounting pieces (60) on both sides flex to fix the stopper pin (63). Mounting piece (60
) and the stopper pin (63) come into contact with each other in flat surfaces, so that they are securely fixed.

Then, when the bolt (64) and nut (65) are loosened, the stopper pin (63) can swing along the notch (61) with the bolt <64) as a support shaft, and any swinging motion is possible. The rotation part is fixed in position. The notches (61) (61
) are opposed to each other with respect to the center of the lower surface of the nozzle body (62), and the respective stopper pins (63) (63) are spherical in shape and swing in the vertical plane between the paths. The distance between the tips of the two pins (63) is variable.

In the case of the second embodiment, if the stopper pin (63) is allowed to swing, the pin (
The height position of the tip of bolt (63) changes, but the height position of the tip of bolt (64) changes.
Mounting piece (60) or stopper pin (6
By increasing the size of the through hole in 3), it is possible to adjust the height to the same height.

Alternatively, as shown in Figures 10 and 11, bolts (6
If the through hole (66) of the penetrating mounting piece <60) in 4) is made a horizontally long hole, the stopper pin (63) can be moved horizontally without swinging, and the stopper pin (63) There is no need to change the height position relative to the tip of the coating nozzle (15).

In this case, the mounting piece (60) of Pol 1-(70)
The fitting part (71) that passes through the through hole (66) is not round but square as shown in Figures 11 and 12, and the part where the bolt (70) passes through the stopper pin (72>) By making both the bolt (70) and the bottle (72) square, it is possible to prevent them from swinging.

Alternatively, the swinging direction may be regulated by a screw-type regulating stopper (not shown) in the upper portion of the stopper pin (63).

Furthermore, a third embodiment in which the distance between the stopper pins is variable will be described below with reference to FIGS. 13 and 14. The stopper pins (80) (80) are erected eccentrically from the center of the upper surface of the cylindrical bases (81) (81) having a diameter larger than that of the stopper pins (80).

The pair of pedestals (81) (81) are fitted into a pair of pedestal holes (83) (83) of a shape into which the pedestals (81) (81) are fitted, which are provided at the lower part of the nozzle body (82). , is fixed laterally with screws (84) (84). The pair of pedestal holes (83) (83) are arranged in a nozzle body (where a straight line connecting the centers thereof should be the midpoint of the pair of application nozzles (15) (15).
The nozzle body (82) is provided substantially symmetrically with respect to the center of the nozzle body (82). By doing this, the pedestals (81) (81) can be rotated within the pedestal holes (83) (83), and fixed at the desired rotation position with the screws (84) (84), so that the stopper pin ( 80) (80)
The interval between the two can be set to a desired distance.

Also, only one of the two coating nozzles (15) or stopper pins (43), (63) is movable as in the above embodiment,
The other one may be fixed. In this case, the width of the bin guide groove (44) in the first embodiment is increased so that the pin slide block (42) can move within a certain range in any direction within the lower surface of the nozzle body (32). By doing so, the distance between the nozzle (15) and the stopper pin (43) can be adjusted to the farthest distance.

Also, when fixing the slide block (33) or pin slide block (42) with screws, the slide block (33) and pin slide block (42)
) and a stopper bottle (43) large enough to cover the entire nozzle body (32).
63) Attach the holding plate that escapes the movable part, and attach the nozzle J.
Blocks (33) and (42) may be pressed and fixed to the lower part of the shield body (32).

Furthermore, when one nozzle is fixed and only the other is movable, a flange portion large enough to cover the nozzle body is provided on the bottom surface of the slide block to which the movable application nozzle is attached. The flange portion and the nozzle body may be fixed with screws at two or more locations with the pins removed.

Furthermore, even if the coating head (9) has one or three or more stopper pins, the position relative to the coating nozzle (15) (15) can be changed as described above.

Furthermore, the position of the coating nozzle has been moved and the midpoint between the two coating nozzles no longer coincides with the center of rotation of 7 degrees to coating, so the coating head must be rotated to perform the coating operation. In this case, the amount of deviation may be stored in the storage means and corrected by controlling the X-axis motor and the Y-axis motor to move the XY child table.

(G) Effects of the Invention As described above, the present invention allows the position of at least one coating nozzle to be moved and fixed relative to other coating nozzles, so coating can be performed in accordance with parts of various sizes. Adhesive can be applied without replacing the head.

[Brief Description of the Drawings] Fig. 1 is a bottom view of the coating head, Fig. 2 is a sectional view of the coating head taken along the line AA' in Fig. 1, and Fig. 3 is a sectional view taken along the line BB' in Fig. 2. A sectional view taken in the direction of arrows, Fig. 4 is c in Fig. 1.
-c' arrow sectional view, FIG. 5 is a plan view of a coating device to which the present invention is applied, FIG. 6 is a perspective view of essential parts of the coating device, FIG. 7 is a side view of the dispenser unit, and FIG. 8 is a bottom view of the coating head of the second embodiment, FIG. 9 is a side view of the coating head, FIG. 10 is an enlarged side view of the coating head, and FIG. 11 shows the bolt inserted into the stopper pin. 12 is a perspective view showing the state before the bolt is inserted into the striker pin, FIG. 13 is a bottom view of the applicator head of the third embodiment, and FIG. 14 is the D in FIG. 13. -D'
It is an arrow view. (2)...Printed circuit board, (8)...Adhesive,
(9)...Applying head, (15)...Applying nozzle, (32)...Nozzle body, (33)...Slide block, 35)...Elongated hole, (36)...
·Screw.

Claims (1)

[Claims] (1) In a coating device that applies adhesive in a syringe to a printed circuit board through a plurality of coating nozzles provided in a coating head, at least one of the nozzles is movable, and A coating device characterized in that it is provided with a fixing means for fixing it at an arbitrary position.