JPH0777307B2 - Automatic mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is to perform various operations at each work station while intermittently rotating a turntable having a plurality of suction nozzles for sucking chip-shaped electronic components on the periphery. The present invention relates to an automatic mounting apparatus for mounting the above components on a printed circuit board at a mounting station.

(B) Conventional Technology In the conventional device of this type, as disclosed in Japanese Patent Laid-Open No. 59-155199, a vacuum circuit to a suction nozzle is formed from a suction station for sucking chip-shaped electronic components to a mounting station. Therefore, if the electronic component cannot be sucked, the vacuum leaks from the suction nozzle. Therefore, the vacuum pressure of the nozzle sucking another component is lowered, and the position of this component is displaced. Further, this leak may cause the adsorption station to be unable to adsorb.

(C) Problems to be Solved by the Invention In view of the problems of the above-mentioned conventional techniques, the present invention has a problem in that the electronic component falls when the suction nozzle cannot be sucked or when the suction nozzle is mounted before mounting. In this case, the purpose is to eliminate the harmful effects of vacuum leakage.

(D) Means for Solving the Problems For this reason, the present invention is provided with a turntable that adsorbs chip-shaped electronic components and that is provided with a plurality of adsorption nozzles each having a switching valve at the periphery thereof, and the switching valve is vacuumed. The components are sucked by the nozzle at the suction station by switching so that a circuit is formed, various work is performed at each work station by the subsequent rotation of the turntable, and the vacuum circuit is switched by switching the switching valve at the mounting station. In an automatic mounting device that shuts off and mounts the component on a printed circuit board, presence / absence detection means for detecting the presence / absence of a component adsorbed by the nozzle at a work station before the mounting station, and the presence / absence detection means If it is detected that there is not, the switching valve of the adsorption nozzle is switched to shut off the vacuum circuit in front of the mounting station. It is provided with a switching means for.

(E) Operation With the above configuration, when the presence / absence detection means detects that the component is not present at the work station after the suction station, the switching means switches the switching valve of the suction nozzle to place the vacuum circuit in front of the mounting station. Cut off.

(F) Example Hereinafter, one example of the present invention will be described in detail with reference to the drawings. Figure 2,
In FIGS. 3 and 4, (1) is a base, (2) is a supply conveyor for mounting and feeding a printed circuit board, and (3) is printing on the supply conveyor (2). Board
It is a transfer device that transfers to the XY table (4). One end of the device (3) is supported by a rail (6) so as to be rotatable and moveable along the rail (6), and the printed board is conveyed by the supply conveyor (2). And the pair of feed claws (7) and (8) rotate around the rail (6) as a fulcrum and descend, and the device (3) moves to the right in FIG. Due to the movement, one nail (7) is
The printed circuit board on the XY table (4) is moved to the right and placed on the discharge conveyor (9), and at the same time, the other claw (8) is placed on the XY table (4) on the supply conveyor (2). It replaces the printed circuit board.

The printed circuit board from the transfer device (3) was placed.
The XY table (4) is lowered by the driving means (not shown) (the state shown in FIG. 21 to FIG. 22) and can be moved back and forth and right and left. Next, in FIG. 5, a turntable (10) is attached to an index unit (11) rotated by a drive motor (not shown) and is intermittently rotated. Eighteen suction heads (12) are vertically movable at equal intervals on the periphery of the table (10). (13)
Is a component supply table that can be moved along a horizontally long rail (14), and a tape (16) that stores chip components (15), which are chip-shaped electronic components, at regular intervals is wound around a reel (17) and the component arrangement is performed. A plurality of tape feeding units (feeding means) (18) arranged to feed the tape (16) for each bitch are arranged in parallel. (19) is a positioning device for positioning the chip component (15) before mounting (mounting) it on the printed circuit board. The XY table (4) is lowered to turn the turntable (10) and the positioning device (19).
It is possible to move in the X-axis direction and the Y-axis direction below the
See figure).

Next, the turntable (10) and the suction head (12) will be described in detail with reference to FIGS. 5 and 6. (20)
Is a cylindrical part (2
It is a cylindrical cam member for guiding a hollow cylindrical table which is suspended and fixed to a mount (11A) of an index unit (11) so as to surround the upper part of (1). A cam (22) is formed around the lower end of the cam member (20) over substantially the entire circumference,
A roller (24) as a sliding portion provided on the upper end of each suction head (12) by a spring (23) on the upper surface of the cam (22).
Rotate while being pressed, and the suction heads (12) rotate up and down according to the shape of the cam (22) together with the turntable (10). That is, a pair of guide rods (25) is erected on each suction head (12) so as to vertically pass through the turntable (10), and a roller (24) is provided at the upper end of the rods (25). A mounting member (26) rotatably provided is fixed. Therefore, each suction head (12) is supported by the turntable (10) so as to be vertically movable.

Next, the suction head (12) that rotates together with the turntable (10) while moving up and down respectively.
Will be described in detail. First, the cylindrical body (27) is rotatably held via a bearing (29) in the upper and lower blocks (28), and a gear having teeth formed on the peripheral side portion integrated with the cylindrical body (27). The structure (30) is rotated by meshing with a drive mechanism (not shown) from the outside. (31) is an intake passage (3 that communicates with a vacuum pump (not shown) serving as a vacuum source.
2) is formed and is a suction nozzle capable of sucking the chip component (15) at the lower end, and the nozzle (31) is guided by a ball bearing (33) so as to be vertically movable and rotatable. Further, a filter case (3) having a dust removal filter (35) which can be taken in and out through an upper surface opening (34) at the upper end of the nozzle (31) and a space (36) under the filter (35).
7) is fixed. The filter case (37) may be formed integrally with the suction nozzle (31). Reference numeral (38) is a filter housing portion detachably attached to the upper portion of the cylindrical body (27), and the inside of the filter housing portion is hollowed to provide a filter (35) and a spring (3
The storage room (40) for 9) is formed. Therefore, when replacing the filter (35), the filter housing (38) is removed from the cylindrical body (27), and the filter (3) is inserted through the top opening (34).
5) should be taken in and out. A spring receiver (41) for fixing the upper end of the spring (39) is rotatably provided at the upper end of the storage chamber (40), and the spring (39) urges the nozzle (31) downward. There is. The spring (39) acts as a damper when mounting chip parts (15) having different heights.
Further, although the filter (35) is provided above the suction nozzle (31), the present invention is not limited to this, and may be provided at any portion integrated with the suction nozzle (31), for example, below the nozzle.

The cylindrical body (27) is provided with three suction nozzles (31) as described above at predetermined angles, and the filter storage section (38) also has the storage chamber (40) as described above. Each of them is formed.

In addition, a communication chamber (43) that can communicate with a hose (42) as a connector that communicates with a vacuum pump is provided on the peripheral side of the cylindrical body (27).
Are formed in three places, and the communication chamber (43) has a communication passage (44), respectively.
Through the storage chamber (40). Therefore, 1
Only one suction nozzle (31) has a storage chamber (40) and a communication passage (4
It will be connected to the hose (42) via 4) and the communication chamber (43). Then, the other two suction nozzles (31) that do not perform the suction operation are pushed upward by pushing up the flange surface (47) by the presser lever (46) biased upward by the spring (45). Has been raised. (48) is an engaging member for pushing down the lever (46).

Next, a rotating device for rotating the suction nozzle (31) itself will be described in detail below with reference to FIG. The rotating roller (50) comes into pressure contact with the protrusion (51) formed on the entire outer peripheral surface of the suction nozzle (31) from the outside, and the rotating roller (50) is passed from the drive motor (52) through the belt (53). ) Rotates, the nozzle (31) rotates by a predetermined angle.

Next, the connection switching device (49) will be described in detail below with reference to FIGS. 8 and 9. The lever (55) swingable around the pin (54) is engaged between the teeth of the gear (30) provided on the cylindrical body (27) to prevent rotation of the cylindrical body (27). The claw (56) and the joint (57) connected to the hose (42) are integrated. (58) is a locking body,
A spring (5) is provided between the locking body (58) and the lever (55).
9) is provided, and the claw (56) is constantly biased so as to mesh with the gear (30). Then, the joint (5
The end of 7) is a reduced diameter part, and a stopper (60) is provided on the stepped part, and a ring-shaped or cylindrical shape is provided around the reduced diameter part so that the end contacts the stopper (60). A seal packing (61) as a seal member is wound. Therefore, when the pawl (56) is engaged with the gear (30) by being biased by the spring (59), the packing (6
In the state of being completely sealed by 1), the joint (57) and the communication chamber (43) communicate with each other so that a vacuum leak does not occur.

When the joint (57) communicates with another communication chamber (43), the lever (55) is rotated by a drive mechanism (not shown) so that the joint (57) and the claw (56) are cylindrical bodies. (27), separated from the gear (30), the cylindrical body (27) can rotate (see FIG. 9). Of course, the open end surface of the communication chamber (43) of the cylindrical body (27) is circular, and the peripheral edge of the opening is formed in a flat shape.

On the other hand, the structure of the other end of the hose (42) will be described with reference to Fig. 5. The other end of each hose (42) is connected to the turntable (10) and is embedded in the connection hose (62).
And the connection hose (62) communicates with a vacuum pump (not shown) through the switching valve (63), the horizontally long intake passage (64), and the central intake passage (65) of the cylindrical body (27). ing.

Next, the switching valve (63) will be described in detail with reference to FIGS. 10 and 11. The valve rod (66) is slidably attached to the bearing body (67), and the valve body (68) is attached to the tip of the valve rod (66).
Is attached. In the state shown in Fig. 10, the spring (69) causes the valve body (68) to move to the horizontally long intake passage (6) of the turntable (10).
The end opening of 4) is closed to interrupt the vacuum circuit by the vacuum pump. The valve rod (66) has a valve body (68).
An air communication passage (70) which is not penetrated by a side is opened, and a lateral hole (71) is formed in a side portion of the communication passage (70) near the valve body (68) to form a valve chamber (72) and an atmosphere. Can communicate with. That is, in the state where the valve body (68) closes the intake passage (64), the valve chamber (72) is connected to the atmosphere through the lateral hole (71) and the communication passage (70), and the valve body (68) is When the intake passage (64) is opened, the lateral hole (71) is closed by the bearing body (67) and a vacuum circuit can be formed. A collar (73) is attached to the other end of the valve rod (66), and the other end of the first lever (75) slidably supported at one end by a pin (74) and the collar. (73) can contact. The second lever (76) having a substantially V shape has a middle portion pivotally supported by a pin (77) so as to be slidable, and rotatable rollers (78) (79) at both ends thereof. Is provided. And
When the second lever (76) swings by a drive source (not shown), the one roller (78) projects into the first recess (80) and the second recess (81) of the first lever (75) (82). ) Can be engaged.

High pressure air is blown from the end of the valve rod (66) on the atmosphere side to forcibly shut off the vacuum circuit to each adsorption nozzle (31).
Furthermore, the vacuum circuit can be cleaned.

Next, the positioning device (19) will be described in detail. The turntable (10) includes work stations (A) to (R).
Orbiting, but positioning station (D) (E)
Positioning devices (83), (84) and (85) are provided in (F), respectively. Since the positioning device (83) has a conventional structure, it will be briefly described. A belt (89) is stretched over the output shaft pulley (87) of the drive motor (86) and the positioning unit (88), The positioning claw is not rotatable. The positioning devices (84) and (85) in the positioning stations (E) and (F) will be described with reference to FIGS. 12 and 13 by taking the device (84) as an example. Positioning device (8
4) has two positioning units (90) (91),
The unit (90) (91) is moved to a position directly below the suction nozzle (31) in the station (E) by a drive cylinder (92) according to a program of a control device which is previously determined according to the size of the chip component (15). The units (90) (91) are movable. The unit (9
0) and (91) are rotatably provided with respect to the frame (93), and the two pairs of guides (94) of the frame (93) slide against the guide rail (95) from the side. By doing so, it will move in a straight line.

The units (90) and (91) are arranged at the tip of the frame (93) with a space (L1), and are provided on the unit (90) (91) and the frame (93). A belt (98) is stretched around the output shaft pulley (97) of the drive motor (96), and the unit (90) (9) is rotated as the pulley (97) rotates.
1) can rotate in synchronization. In addition, the line connecting the centers of the units (90) and (91) is the guide rail (9
5) is parallel to the moving direction of the frame (93) moving along, and the moving amount of the frame (93) connected to the rod (99) of the drive cylinder (92) via the connecting member (100) is the above-mentioned distance. (L1) is the same distance as the cylinder (92) fixed to the fixed portion of the backward limit stopper (10
1) and the forward limit stopper (102).
Therefore, if the center of the suction nozzle (31) and the center of the positioning unit (90) are aligned with each other, the drive cylinder (92) is actuated to automatically replace the unit (91) with the unit (91). The center of 91) will coincide with the center of the suction nozzle (31).

Next, regarding the structure of the positioning unit (90) (91),
A description will be given based on the figure. When the pusher (103) is lifted by a cam (not shown), the pin (104) serves as a fulcrum
Since the opening / closing plate (105) rotates in the direction to open the positioning claw (106), the second opening / closing plate (107) also uses the pin (108) as a fulcrum in conjunction with the rotation of the first opening / closing plate (105). It rotates to open its claw (109). When the pusher (103) descends, both pawls (106) (109) are closed by a spring (111) whose one end is supported by a fixed part (110), and a chip part (15) sucked by a suction nozzle (31). And the parts (15) are positioned. Although there are four positioning claws per unit, the opening and closing of the other pair of claws (112) (113) has the same structure. Further, (114) is a stopper, and the opening / closing plate (10
This is to limit the closing direction of 5). The positioning claws (106) (109) (112) (113) are in the rotating direction of the chip component (15) sucked by the suction nozzle (31) during rotation of the turntable (10). That is, the drive motor (96) rotates the component (15) in a direction in which the component (15) is attached to the printed circuit board.
Then, when the suction nozzle (31) descends, positioning is performed only by the centering operation.

Further, as shown in FIG. 15 and FIG. 16, most of the chip parts (15) have a symmetrical shape, so that the chip parts (15)
If the suction nozzle (31) is rotated as described above so that the chip component (15) is rotated 180 degrees in advance, when it is mounted on the printed circuit board by rotating 180 degrees, the claws (106) (109). ) (112) (113) need not be rotated during rotation of the turntable (10).

As described above, when the chip part (15) passes through the positioning stations (D), (E), and (F), the positioning unit (88) (90) (91) (11) at any of the stations.
5) The positioning is performed by either (116), but which unit is selected depends on the size and shape of the chip component (15) and is selected according to the program of the control device.
In addition, in the stations other than the selected station, the suction nozzle (31) does not descend due to a mechanism (not shown), and the positioning unit that is not selected does not operate.

Next, FIG. 17 shows displacements of the suction nozzle (31) at the upper and lower levels. The work stations (A), (D), (E),
In (F) and (J), in order to perform each work, the cam (22) is separated and the vertical movement is performed. This can be achieved by disposing an upper and lower rail (not shown) which is connected to the cam (22) or descends at a portion where the cam (22) is interrupted.

In addition, work stations (A), (B), (C),
In (D), (E), (F), and (G), positioning units (88) and (9) for positioning the chip component (15) are used.
Photo sensor (11) as presence detecting means for detecting the presence or absence of 0), (91), (115), (116) and the component (15).
7), (118) and the photo sensor (119) as a detection means that can be swung by the drive motor (120) to detect the suction posture, are located below the suction nozzle (31), so that the parts are (15) must be transported, and in particular at the station (J), the suction nozzle (31) must be moved down to just above the printed board because of mounting the chip component (15) on the printed board.

Therefore, at the station (I), it was lowered to the Z level at once, and the next station (J) was started from the Z level. For its structure, see 18th
A detailed description will be given with reference to FIGS. 19, 19 and 20. FIG. 18 shows the states of the work stations (H) and (I) from the right side. The suction head traveling from the station (H) to the cam (22) by the rotation of the turntable (10). (3
1) The upper roller (24) is transferred onto the upper and lower rails (121) and is carried to the next station (I). The structure of the upper and lower rails (121) will be described in detail with reference to FIGS. 19 and 20. The upper and lower rails (121) can swing about the pins (122) as fulcrums, are urged by a spring (123), and are stoppers (124) protruding from the upper and lower rails (121).
The state in which the shaft is in contact with the shaft (125) is the state in the upper side in FIG. The shaft (125) is moved up and down by a cam drive mechanism (not shown) to move the vertical rail (121) up and down via the pin (122). The upper and lower rails (12
A rotatable roller (126) is attached to the end of (1), and a push-down member (127) pushes down the roller (126) to move the roller from the upper and lower rails (121) as shown in FIG. (24) leaves. That is, the cam (2) of the cylindrical cam member (20)
In 2), the part where the upper and lower rails (121) are arranged is interrupted, and since there is a significant difference in the vertical positional relationship between the one end side and the other end side of the interrupted part, the interrupted part The upper and lower rails (121) are disposed on the upper and lower parts to move up and down. Then, in the state as shown in FIG. 19, the cam (22A) on the one end side located above and the upper and lower rails (121) are at the same level, and the rear roller (24) is set to the upper and lower rails (12).
1) The upper rail (121) descends together with the shaft (125), and the upper and lower rails (121) move to the lower cam (22).
Same level as B). When the roller (24) rides on the lower cam (22B), the station (J) is set. At this time, when the pressing member (127) presses down the roller (126), as shown in FIG. The upper and lower rails (121) are rotated, and then the rails (121) are raised to move the upper cam (2).
2A) and the pressing member (127) also moves above the roller (126). Further, in the present embodiment, an example in which the upper and lower rails (121) are used for connecting from the upper side to the lower side is shown, but the present invention is not limited to this, and when connecting from the lower side to the upper side when there is a difference in the vertical positional relationship. May be used for.

In addition, in this embodiment, the chip part (15) is provided with a nail (10
6) Press with (109) (112) (113), X-axis direction, Y
Although the positioning is performed in the axial direction and the driving motor (96) is used to perform the positioning in the θ direction via the belt (98), the position of the chip component (15) is not limited to this but is optically detected. The position of the θ direction may be corrected by rotating the suction nozzle (31) and the position of the X axis direction and the Y axis direction may be corrected by the XY table (4).

The operation will be described below with the above configuration. First, when the printed circuit board is placed on the supply conveyor (2) and conveyed to reach the position below the transfer device (3), the conveyor (2) is stopped. Then, the pair of feed claws (7) and (8) are pivotally lowered with the rail (6) as a fulcrum, and the right claw (7) is located at the left end of the printed board on the XY table (4). (8) is engaged with the left end of the printed circuit board conveyed by the conveyor (2). After that, the transfer device (3) moves along the rail (6),
The substrate is transferred from the supply conveyor (2) to the XY table (4), and the substrate on the table (4) is transferred to the discharge conveyor (9) and moved to the right by the conveyor (9).

The printed circuit board is positioned on the XY table (4) by a positioning device (not shown), but the transfer device (3) raises the feed claws (7) and (8) to raise the rail (6).
Return to the original position along. The XY table (4) can be moved downward (as shown in FIG. 22) by a driving means (not shown) and moved in the front-back direction (Y-axis direction) and left-right direction (X-axis direction) (FIG. 23). See), turntable (10)
And it moves to the position below the positioning device (19). On the other hand, among a plurality of tape supply units (18) arranged side by side on the component supply table (13), an arbitrary unit (18) is supplied along the rail (14) so as to face the turntable (10). The stand (13) has already moved, and the reel (1)
The tape (16) wound around the tape (16) has its upper surface film peeled by a peeling mechanism (not shown) so that the chip component (15) is located directly below the suction nozzle (31).

Here, the index unit (11) is rotated by the motor, and the turntable (10) is intermittently rotated.

First, in the suction station (A) which is the first working station, the lower end of the suction nozzle (31) sucks and chucks the chip component (15) from the tape supply unit (18). At the station (A), the lower end of the suction nozzle (31) of the suction head (12) must be lowered to the height level of the tape (16), which is the interruption of the cam (22) of the cam member (20). This is done by placing a roller (24) at the upper end of the head (12) on a vertically movable upper and lower rail (not shown) arranged in a part and lowering the upper and lower rail. This suction is performed by the suction nozzle (31) of the suction head (12), the filter (35), and the storage chamber (4 of the cylindrical body (27).
0), communication passage (44), communication chamber (43), joint (57) communicating with the communication chamber (43) through the seal packing (61), hose (42), connection hose (62), valve chamber (7
2), horizontal intake passage (64), central intake passage (6) of cylindrical part (21)
5) and a vacuum pump (not shown) are connected to form a vacuum circuit.

Next, the suction head (12) raised from the suction level moves to the second work station (B) via the roller (24) sliding on the cam (22) of the cam member (20). In this station (B), whether or not the suction nozzle (31) is sucking the chip component (15) is detected by the photo sensor (117) and the suction nozzle (31) is set in advance by a control device (not shown). The rotating device rotates the chip component (15) while attracting it in the programmed direction. That is, as shown in FIG. 7, the rotary roller (50) is brought into pressure contact with the projection (51) of the suction nozzle (31) from the outside, and the drive motor (5
The rotation of (2) causes the rotation roller (50) to rotate by a predetermined angle via the belt (53). After this rotation, the rotating roller (50) separates from the suction nozzle (31). In this way, the chip component (15) is rotated in advance before the positioning so that it is oriented when mounted.

Next, in the work station (C), in the second work station (B), the suction nozzle (31)
When the photo sensor (117) detects that the suction head (12) is not sucked, the vacuum circuit to the suction head (12) is shut off by the switching valve (63). That is, when the roller (79) is pressed by the drive source (not shown) from the state shown in FIG. 11 to the state shown in FIG. 10, the second lever (76) swings and the second lever (75) moves to the second position. The roller (7) engaged with the recess (81)
8) goes over the protrusion (82) and engages with the first recess (80). Therefore, the first lever (75) also rotates clockwise, and the valve rod (66) moves so that the valve body (68) closes the laterally long intake passage (64) by the spring (69). As a result, the suction nozzle (31) is connected to the hose (42), the connection hose (62), the valve chamber (72), the lateral hole (71) of the valve rod (66), and the atmosphere connection passage (7).
0) to communicate with the atmosphere.

The next working station (D) (E) (F) is a positioning station for the chip component (15), whichever of the positioning stations (D) (E) (F) follows a predetermined program depending on the shape of the component (15). Which of the positioning units (88) (90) (91) (115) (116) is to be used for positioning is determined according to the position of the chip component (15) when it is sucked at the suction station (A). Has already been decided. For example, if the right positioning unit (91) is selected at the positioning station (E), the frame (93) is spaced by the drive cylinder (92) along the guide rail (95) via the rod (99). (L1) move, the position is determined by the forward limit stopper (102), and the nozzle (31) is located directly below the suction nozzle (31).
The unit (91) has already been moved before is reached. At this time, stations (D) and (F) become idle stations.

Regarding the positioning operation of this chip part (15)
A description will be given based on the figure. First, when the pusher (103) is lifted by a cam (not shown), the first and second opening / closing plates (105) (107) are respectively pushed against the spring (111) by the pins (104).
Claw (106) for positioning by rotating around (108) as a fulcrum
(109) (112) (113) opens. And the suction nozzle (3
1) is lowered by lowering a vertical rail (not shown) on which the roller (24) at the upper end of the suction head (12) is lowered,
When the pusher (103) descends, the claw (106)
It is sandwiched by (109), (112) and (113) to perform positioning from four sides, and after the pusher (103) rises again, the upper and lower rails rise and the suction nozzle (31) also rises.
After this, the turntable (10) will be intermittently rotated for one minute.

Next, in the detection station (G), it is determined whether or not the suction nozzle (31) is sucking the chip component (15) and whether it is sucking at a normal position by the photosensors (118) and (119).
Detect with. The sensor (119) can be swung by the drive motor (120) and checks the suction posture of the chip component (15), but the presence or absence and the posture of the component may be detected by one sensor.

At the ninth work station (I), the suction nozzle (31)
Is rapidly lowered to the Z level, which will be described with reference to FIGS. 19 and 20. First, in the state shown in FIG. 19, the upper cam (22A) and the upper and lower rails (121) are at the same level, the roller (24) moves onto the upper and lower rails (121), and then the upper and lower rails together with the shaft (125). (121) descends and continues at the same level as the cam (22B) below. When the roller (24) rides on the lower cam (22B), the pushing member (127) pushes down the roller (126). Then, as shown in FIG. 20, the upper and lower rails (121) rotate against the springs (123), and then the rails (121) ascend with the shaft (125) to reach the same level as the upper cam (22A). Naruto depressing member (1
27) also moves away from the roller (126).

At the mounting station (J), which is the next tenth work station, the chip component (15) is mounted on the printed circuit board on the XY table (4). Therefore, the suction nozzle (31) is lowered to the substrate by the upper and lower rails (not shown) to perform this mounting.

That is, the photo sensor (117) is the chip component (15).
Detection sensor (G), the photo sensor (118) also detects the presence of the detection sensor (G), and the photo sensor (119) determines that the suction posture is normal. 63) is actuated, the oblong intake passage (64) is closed by the valve body (68), and the valve chamber (72) is opened to the atmosphere via the atmosphere communication passageway (70) of the valve rod (66) as shown in FIG. The valve rod (66) is mounted by being blown with high-pressure air from the atmospheric side end portion of the valve rod (66). Therefore, the photo sensor (117) (118)
Does not detect the presence of the chip component (15) or the sensor (119) determines that the suction posture is abnormal, the suction nozzle (31) does not descend and is not mounted.

The next stations (K) (L) (M) are idle stations. In the discharging station (N), the photosensors (117) and (118) detect the presence of the chip component (15) by the suction nozzle (31), but the photosensor (119) determines that the suction posture is abnormal. In this case, the chip component (15) is discharged by the lower end of the suction nozzle (31). That is, as described above, the vacuum circuit is shut off and high-pressure air is blown from the end of the valve rod (66).

At this time, dust such as dust sucked from the lower end of the suction nozzle (31) is blocked by the filter (35) and accumulated in the space (36) of the filter case (37). J) and discharge station (N)
When the high pressure air is blown in, the dust is discharged from the lower end of the nozzle (31), and the filter (35) and its periphery are automatically cleaned. Therefore, when the vacuum circuit is formed next time, dust and the like will not be clogged in the circuit.

At the next station (O), which nozzle (31) of the three suction nozzles (31) of the suction head (12) is being used is detected by a sensor (not shown).

At the next nozzle selection station (P), which suction nozzle (31) (31) (31) is to be used next is selected based on the data programmed in the controller. For this selection, chip parts of the same shape and size (1
When 5) is used, the same suction nozzle (31) does not have to be used for selection, but the selection may be sequentially performed. When a small chip-shaped component is used or a large chip-shaped component is used, the suction nozzle corresponding to the small chip-shaped component can be selected.

This selection operation, that is, the operation of the connection switching device (49) will be described. When the joint (57) is connected to another communication chamber (43), the lever (55) is rotated by a drive mechanism (not shown), The joint (57) and the claw (56) are separated from the cylindrical body (27) and the gear (30), respectively, and the gear (30)
A gear (not shown) meshes with the drive mechanism (not shown) to rotate the cylindrical body (27) through the bearing (29) by the gear. At the time of this rotation, the holding lever (46) engages the engaging member (48). ), All the suction nozzles (31) (31) (31) are lowered to perform the operation. Then, after the rotation of the cylindrical body (27), the lever (55) is rotated so that the joint (57) communicates with the communication chamber (43) corresponding to the suction nozzle (31) selected. ) And gear (30) are engaged, and seal packing (6
Completely sealed by 1). In addition, the presser lever (4
6) is the flange surface (47) of the other two suction nozzles (31)
The suction nozzle (31) is raised by the spring (45). The next station (Q) (R) is an idle station.

(G) Effect of the Invention Because of the above, according to the present invention, the vacuum leaks when the suction nozzle is unable to suck or when the electronic component is dropped before mounting even if it is sucked. Therefore, it is possible to reliably prevent the occurrence of a situation in which the vacuum pressure of another suction nozzle is lowered and the position of the component is displaced, or the suction station cannot perform suction.

[Brief description of drawings]

1 to 23 are views showing an embodiment of the present invention, FIG. 1 is a plan view showing a turning device and a positioning device, FIG. 2 is a front view of an automatic mounting device, and FIG. 3 is a plan view of the same automatic mounting apparatus, FIG. 4 is a side view of the same automatic mounting apparatus, FIG. 5 is a vertical sectional view of a turntable, FIG. 6 is a vertical sectional view of a suction head, and FIG. Partial longitudinal sectional views of the suction head for showing the rotation of the nozzle, FIGS. 8 and 9 are plan views of the cylindrical body and the like for showing that the cylindrical body is rotatable, FIGS. 10 and 11. FIG. 12 is a cross-sectional plan view showing a switching valve, FIG. 12 is a plan view of a positioning device, FIG. 13 is a side view of the positioning device, FIG. 14 is a longitudinal sectional view of a main part of the positioning unit, FIG. 15 and FIG. 16 is a plan view showing the relationship between the positioning claw and the chip component, FIG. 17 is a view showing the vertical displacement of the suction nozzle, and FIG. The work station (I)
FIG. 19 is a side view showing the operation of the upper and lower rails, FIG. 21 is a side view of the automatic mounting apparatus showing a state in which the XY table is above, and FIG. Side view of the automatic mounting device showing the XY table lowered,
FIG. 23 is a side view of the automatic mounting device showing a state where the XY table is moved to the lower position of the turntable or the like. (4) …… XY table, (10) …… Turntable,
(12) …… Suction head, (15) …… Chip parts, (18)
…… Tape supply unit, (19) …… Positioning device,
(31) …… Suction nozzle, (50) …… Rotary roller, (52)
...... Drive motor, (53) …… Belt.

Claims (1)

[Claims] 1. A turntable having a plurality of suction nozzles, each of which adsorbs a chip-shaped electronic component and has a switching valve on its periphery, and which switches the switching valve so that a vacuum circuit is formed. The nozzle sucks the component, and then the turntable rotates to perform various work at each work station, and the mounting station mounts the component on the printed circuit board by shutting off the vacuum circuit by switching the switching valve. In an automatic mounting device, presence detection means for detecting the presence or absence of a component sucked by the nozzle at a work station before the mounting station, and switching of the suction nozzle when the presence detection means detects the absence of the component A switch means for switching the valve to shut off the vacuum circuit in front of the mounting station is provided. Mounting device.