JPS63174398A - Automatic mounter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to an automatic mounting device for electronic components that automatically mounts chip-shaped electronic components to predetermined locations on a printed circuit board.

(B) Conventional technology A conventional device of this type is disclosed in Japanese Patent Application Laid-Open No. 113699/1982, but it is possible to select any one of a plurality of suction nozzles depending on the shape of the chip-shaped electronic component. This disclosure discloses a technique for performing suction and attachment using the nozzle.

However, when communicating with another suction nozzle instead of the suction nozzle that communicates with the vacuum source, an air intake that can be communicated with the intake passage A is connected to the arm in which the intake passage A that communicates with the vacuum source is formed. This is achieved by allowing rotation of the mounting shaft having path B. For this reason, the sliding portion may be worn out due to the rotation, which poses a problem in terms of sealing performance.

Also, Japanese Patent Application No. 1983-74057 (issued by the applicant)
As shown in the specifications, etc., if the structure is such that the vacuum hose comes out directly from the suction nozzle, the hose will become twisted and cannot rotate continuously in one direction, and the hose will be twisted repeatedly. However, there was a problem that the life of the hose was short.

(C) Problems to be Solved by the Invention In view of the problems of the prior art described above, the present invention aims to improve the sealing performance and extend the life of the vacuum circuit connection between the suction head and the turntable. That is.

(d) Means for Solving the Problems To this end, the present invention provides a turntable that has an inlet passage connected to a vacuum source and is rotated intermittently, and a turntable that has one end connected to the inlet passage of the table. A connecting body provided with a sealing member on the end side, and a plurality of types of suction nozzles that are vertically movably supported by the table and for suctioning various electronic components, and communication paths are formed respectively corresponding to the nozzles. The suction head is made up of a suction head, and a connection switching device that allows the other end of the connecting body to be brought into contact with and separated from the head, and the other end of the connecting body can be communicated with any of the communication paths.

(E) When replacing the suction nozzle with another suction nozzle due to the difference in the shape of the electronic component in the form of a working chip, use a connection switching device to connect the other end of the connecting body, which connects one end to the intake path of the turntable, from the suction head. After separation, the suction head is rotated. After refusing, the switching device is returned to its original position, and the end of the connecting body is communicated with the corresponding communication path of the suction head.

(f) Example An embodiment of the present invention will be described in detail below with reference to the drawings.

(1) is a base, (2) is a supply conveyor for placing and transporting printed circuit boards, and (3) is the supply conveyor (
2) This is a reloading device that reloads the printed circuit board on the XY table (4). The equipment (3) is rotatable with one end supported by a support shaft (5) and movable along a rail (6), and is connected to the supply conveyor (2).
), when the printed circuit board is conveyed, the pair of feed claws (7) and (8) rotate around the spindle (5) and descend, causing the device (3) to move to the right in Fig. 3. Moving. As a result of this movement, one claw (7) moves the printed circuit board on the XY table (4) to the right and places it on the discharge conveyor (9), and at the same time, the other claw (8) moves the printed circuit board on the XY table (4) to the right. ) on which the printed circuit board on the supply conveyor (2) is placed.

The XY table (4) on which the printed circuit board from the reloading device (3) is placed is lowered by a drive means (not shown) to the state shown in FIGS. 21 and 22. ), it can move forward, backward, left and right. A turntable (10) is attached to an index unit (11) rotated by a drive motor (not shown) and rotated intermittently. Furthermore, 18 suction heads (12) are provided at equal intervals around the periphery of the table (10) so as to be movable up and down. (13
) is a component supply table that can be moved along a horizontally long rail (14), and a tape (16) for storing chip parts (15), which are chip-shaped electronic components, at equal intervals is wound around a reel (17). A tape supply unit (supply means) (1) configured to feed out the tape (16) at each arrangement pitch.
8) are installed in parallel. (19) is a chip part (15)
This is a positioning device for positioning before mounting (mounting) the printed circuit board on the printed circuit board. In addition, the XY table (4)
By descending, it becomes possible to move in the X-axis direction and the Y-axis direction below the turntable (10) and the positioning device (19) (see FIG. 23).

Next, based on FIGS. 5 and 1, the turntable (
10) and the suction head (12) will be described in detail. (
20) is a hollow cylindrical table guide which is suspended and fixed to the mounting base (IIA) of the index unit (11) so as to surround the upper part of the cylindrical part (21) formed on the upper part of the turntable (10). It is a cylindrical cam member.The cam member (20>
2) is formed, and a spring (23) is formed on the top surface of the cam (22).
The roller (24) serving as a sliding part provided at the upper end of each suction head (12) rotates while being pressed.
Each suction rod (12) rotates together with the turntable (10) while moving up and down according to the shape of the cam (22).

That is, each suction head (12) has a pair of guide rods 2.
5) is erected vertically movably penetrating the turntable (10), and a mounting member (26) on which a roller (24) is rotatably mounted is fixed to the upper end of the wire rod (25). Therefore, each suction spatula (12) has a turntable (1
0) so that it can move up and down.

Next, the suction head (1) rotates together with the turntable (10) while moving up and down with respect to the turntable (10).
2) will be explained in detail. First, the cylindrical body (27) is rotatably held via bearings (29) in the upper and lower blocks (28), and a gear (27) with teeth formed on the circumferential side integrated with the cylindrical body (27) is attached. 30) is rotated by meshing with an external drive mechanism (not shown). (31
) is formed with an intake passage (32) communicating with a vacuum pump (not shown) as a vacuum source, and has a chip component (15) at its lower end.
), and the nozzle (31) is guided by a ball bearing (33) so that it can move up and down and rotate.The upper end of the nozzle (31) has a top opening (34). Dust removal filter that can be taken in and out (35)
and a space (3) below the filter (35).
A filter case (37>) having a filter case (6) is fixed.

This filter case (37) may be integrally formed with the suction nozzle (31), (3g) is the cylindrical body 27).
This is a filter storage section that is removably attached to the upper part of the filter, and the inside is hollow to form a storage chamber (40) for the filter (35) and the spring (39).

Therefore, when replacing the filter (35), it is sufficient to remove the filter storage part (38) from the cylindrical body (27) and insert/remove the filter (35) from the top opening (34).

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 components (15) of different heights. Further, although the filter (35) is provided above the suction nozzle (31), it is not limited thereto, and may be provided anywhere as long as it is integrated with the suction nozzle (31>, for example, it may be provided at the bottom inside the nozzle.

The cylindrical body (27) is provided with three suction nozzles (31) as described above at each predetermined angle, and the filter storage portion (38) is also provided with a storage chamber (40) as described above. Three are formed respectively.

Further, in the circumferential side of the cylindrical body (27), there is a communication chamber (
43) are formed at three locations, and each of the communication chambers (43) communicates with the storage chamber (40) via a communication path (44). Therefore, only one suction nozzle (31) is connected to the storage chamber (4).
0), the other two suction nozzles (31) that are connected to the hose (42) via the communication path (44) and the communication chamber (43) and that do not perform suction operation are connected to the spring (45). ), the flange surface (47) is pushed upward by the presser lever (46). (4B> is an engagement member for pushing down the lever (46).

Next, a rotation device for rotating the suction nozzle <31) itself will be described. A rotating roller (50) is brought into pressure contact with a protrusion (51) formed on the cylindrical side of the suction nozzle (31) from the outside, and the rotating roller (50) is moved from the drive motor (52) via a belt (53). By rotating the nozzle (3
1) will be rotated by a predetermined angle.

Next, based on Figures 8 and 9, the connection switching device (49)
This will be explained in detail below. A lever (55) that can swing about the pin (54) is engaged between the teeth of the gear 30 provided on the cylindrical body (27>), and the cylindrical body 2
7) and a claw (S6) that prevents rotation of the hose (42).
) is integrated with the joint (57).

(5B) is a locking body; a spring (59) is provided between the locking body (58) and the lever (55);
56) is constantly biased so that it meshes with the gear 30).

The end of the joint <57> is a reduced diameter part, and a stopper (60) is provided at the stepped part,
A seal backing (61) serving as a ring-shaped or cylindrical sealing member is wrapped around the reduced diameter portion so that its end abuts against the stopper (60).

Therefore, when the spring (59) is no longer biased and the pawl (56) is engaged with the gear (30), the backing (
61), the joint (57) and the communication chamber (43) communicate with each other so that no vacuum leak occurs.

In addition, when making the joint (57) communicate with another communication chamber (43), the lever (55) is rotated by a drive mechanism (not shown) to connect the joint (57) and the claw (56).
) are separated from the cylindrical body (27) and the gear (30), respectively, and the cylindrical body (27) becomes able to rotate (see Fig. 9).Of course, the opening of the communication chamber (43) of the cylindrical body (27) The end face has a circular shape, and the opening periphery thereof is formed into a planar shape.

On the other hand, to explain the structure of the other end of the hose (42), the other end of each hose (42) is connected to the turntable (
10), and the connecting hose (62) is connected to the switching valve (63), the horizontally elongated intake passage (64), and the central intake passage (65) of the cylindrical body 27).
> to a vacuum pump (not shown).

Next, based on FIGS. 10 and 11, the switching valve (63
) will be explained in detail. The valve stem (66) is slidably attached to a bearing body (67), and a valve body 68) is attached to the tip of the valve stem (66). In the state shown in Fig. 10, the valve body (68) is moved by the spring (69) to the turntable (
The end opening of the horizontally elongated intake passage (64) of 10) is closed to cut off the vacuum circuit by the vacuum pump. The valve stem (66) is provided with an atmospheric communication passage (70) that does not pass through the valve body (68) side, and the communication passage 70
) is provided with a side hole (71) in the side near the valve body (68), allowing communication between the valve chamber (72) and the atmosphere. That is, when the valve body (68) closes the intake passage (64), the valve chamber (72) is connected to the atmosphere via the side hole (71) and the communication passage (70), and the valve body (68) closes the intake passage (64). When the intake passage (64) is opened, the side 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 stem (66), and one end is attached to the bottle (73).
4), which is pivotally supported by the lever (7) and is swingable.
5) The other end side and the collar (73) can be in contact with each other. The approximately U-shaped second lever (76) is pivotally supported by a pin (77) at its middle portion and is swingable, and has rotatable rollers (78) (79) at both ends. is provided. When the second lever (76) is swung by a drive source (not shown), one of the rollers (78
) can be engaged with the first recess (8o) and the second recess (81) of the first louver (75) beyond the protrusion (82).

In addition, high pressure air is blown from the atmosphere side end of the valve stem <66).
It is also possible to forcibly cut off the vacuum circuit to each suction nozzle (31), or even to clean the vacuum circuit.

Next, the positioning device (19) will be explained in detail. The turntable (work 0) is located at each work station (A) to (
R), but the positioning stage 5 (D) (E)
The positioning device t (83) in which the positioning devices 83, 84, and 85 are arranged in (F) has a conventional structure, so it will be briefly explained, but the drive motor (86)
A belt (89) is stretched between the output shaft pulley (87) and the positioning unit (88), and a positioning claw (not shown) is rotatable at the zero positioning station (E) (F).
) The positioning device (84), which will be explained based on FIGS. 12 and 13 using the device (84) as an example, has two positioning units (90) and (91). and the unit (90) (
91) is a drive cylinder (
92) to the position directly below the suction nozzle (3) at station (E).
1) is movable. The unit (90) (9
1) is rotatably provided with respect to a frame (93), and the frame (93) is moved by sliding its two pairs of guides (94) in contact with the guide rails (95) from the sides. , it will move in a straight line.

The units (90) and (91) include the frame (93
) are arranged at a distance (Ll) at the tips of the units (90), (91) and the output shaft pulley (97) of the drive motor (96) provided on the frame (93). A belt (98) is stretched, and the units (90) and (91) can rotate in synchronization with the rotation of the pulley (97). Further, a line connecting the centers of the units (90) and (91) is parallel to the moving direction of the frame (93) moving along the guide rail (95), and is connected to the rod (99) of the drive cylinder (92). The amount of movement of the frame (93) connected via the member (100) is equal to the distance (L).
a reverse limit stopper (101) fixed to a fixed part of the cylinder (92) so as to be at the same distance as l);
It is regulated by a forward limit stopper (102). Therefore, the center of the suction nozzle (31) and the positioning unit (
If the centers of the units (90) and 90) are aligned, the drive cylinder (92) can be operated, and if the unit (91) is automatically replaced, the center of the unit (91) is aligned with the suction nozzle (31).
It will coincide with the center of

Next, the structure of the positioning units (90) and (91)' will be explained based on FIG. 14. When the pusher (103) is raised by a cam (not shown), the bottle (104)
The first opening/closing plate (105) connects the positioning claw (10
6) is rotated in the opening (direction), so the first opening/closing plate (105
), the second opening/closing plate (107) also opens the bottle (10
g) as a fulcrum to open its pawl (109). When the button shear (103) descends, one end touches the fixed part (110).
) by the spring (111) supported by both claws (106) (
109) is closed to sandwich the chip component (15) sucked by the suction nozzle (31) and position the component (15).Although there are four positioning claws per unit, the other pair The opening/closing of the claws (112) and (113) has a similar structure. Further, (114) is a stopper which limits the closing direction of the opening/closing plate (105).

This positioning claw (106) (109) (112) (1
13) is the direction in which the chip component (15) sucked by the suction nozzle (31) is rotated while the turntable (10) is rotating, that is, the component (15) is attached to the printed circuit board. When the suction nozzle (31) is rotated by the drive motor (96) in a direction corresponding to the actual orientation, and the suction nozzle (31) is lowered, positioning is performed only by centering operation.

Furthermore, as shown in FIGS. 15 and 16, since most of the chip components (15) have a symmetrical shape, when the chip components (15) are rotated 180 degrees and mounted on the printed circuit board, If the suction nozzle (31) is rotated as described above so as to rotate the chip component (15) 180 degrees in advance, the claws (106) (109) (112)
(113) does not need to be rotated while the turntable (10) is rotating.

In this way, when the chip component (15) passes through the positioning stations (D), (E), and (F), the chip component (15) is placed in the positioning unit (88) (90>(91) at any of the stations.
) (115) (116>), but which unit is selected depending on the size and shape of the chip component (15) according to the program of the control device. At the station, the suction nozzle (31) does not descend due to a mechanism not shown, and furthermore, the positioning units that are not selected do not operate.

Next, the 17th @ shows the vertical displacement of the suction nozzle (31), and the work stations (A), (D), (E
), (F), and (J), in order to perform each work, the above-mentioned cam (22) is left behind and moved up and down. 22
) and upper and lower rails that connect or descend (not shown)
This becomes possible by arranging the .

Also, work stations (A), (B), (C), (D
), (E), (F), and (G), chip parts (
15), positioning units (88) and (9
0), (91), (115), (116) and the above parts (
Photo sensors (117) and (118) as presence/absence detection means for detecting the presence or absence of 15) and 7 Otosensors (H9) as detection means that can be swung by a drive motor (120) to detect the adsorption posture are adsorbed. Since the nozzle is located below the nozzle (31), it is necessary to transport the component (15) at a high level.Especially at the station (J), since the chip component (15) is mounted on the printed circuit board, the suction is carried out right above the printed circuit board. The nozzle (31) must be lowered.

Therefore, at station (I), -ki is lowered to level 2, and the next station (J) is started from level 2. Regarding its structure, see the first
This will be explained in detail based on FIG. 8, FIG. 19, and FIG. 20. 18th
In the figure, the state of work stations (H) and (1) is shown from the right, and the suction head (31 ) The upper end roller (24) transfers onto the upper and lower rails (121) and is carried to the next station (1). The structure of this upper and lower rail (121) will be explained in detail based on FIGS. 19 and 20. Upper and lower rails (1
21) can swing around the bin (122), and is biased by a spring (123) to move the vertical rail (12).
1) The stopper (124) protrudingly installed on the shaft <125)
The state in which it is in contact with is the state in which it is above in FIG. The shaft <125) is a cam drive mechanism (not shown)
The vertical rail (121) is moved up and down via the bin (122).

Further, a rotatable roller (126) is attached to the end of the upper and lower rails (121), and a push-down member (127)
By pushing down the roller (126), the roller (24) is separated from the upper and lower rails (121) as shown in FIG.

That is, the cam (22) of the cylindrical cam member (20>) has a break at the part where the upper and lower rails (121) are arranged, and one end and the other end of the cut part are not in the vertical positional relationship. Since there is a significant difference, a vertical rail (<121) is provided at the interrupted portion to move it up and down. In the state shown in FIG. 19, the cam (22A) at one end located above and the upper and lower rails (121) are at the same level, and then the roller (24) is moved to the upper and lower rails (121).
21) The upper and lower rails (121) descend together with the shaft (125), and the upper and lower rails (121) become at the same level as the lower cam (22B).

Then, when the roller (24) moves onto the lower cam (22B), it enters the station (J) state, but at this time, when the pressing member (127) presses down the roller (126),
As shown in Fig. 20, the upper and lower rails (121) are rotated, and the return rail (121) rises to the upper cam (22A).
), and the pressing member (127) also moves above the roller (126). Furthermore, in this embodiment, an example is shown in which the upper and lower rails (121) are used for transferring from above to below, but this is not limited to this, and when there is a difference in the vertical positional relationship, when transferring from below to above. May be used for.

In this embodiment, the chip component (15) is held by the claws (15) from all sides.
Press with 06) (109) (112) (113),
Position the X-axis direction and Y@ direction, and drive the drive motor (96
), the positioning in the θ direction is performed via the belt (98), but the present invention is not limited to this; for example, by optically detecting the position of the chip component (15) and rotating the suction nozzle (31). The positions in the X-axis direction and the Y-axis direction may be determined, and the position in the θ direction may be determined using the XY table (4).

The operation of the above configuration will be explained below.

The printed circuit board is placed on the V supply conveyor (2) and transferred to the reloading device! When reaching the lower position of (3), the funbena (2) stops. And the spindle (5)
The pair of feed claws (7) and (8) rotate and descend with (2), it engages with the left end of the transported printed circuit board. Thereafter, the transfer device (3) moves along the rails (6) to transfer the substrate from the supply conveyor (2) to the XY table (4), and also transfers the substrate on the table (4) to the discharge conveyor. 9) and moved to the right by the conveyor (9).

Then, the printed circuit board is positioned on the XY table (4) by a positioning device (not shown), and the reloading device (3) raises the feed claws (7) and (8) to
) to return to the original position. In addition, the XY table (4) is lowered by a drive means (not shown) as shown in Fig. 22, and can be moved in the front-rear direction (Y-axis direction) and left-right direction (X-axis direction) (see Fig. 23). (see), move the turntable (10) and the positioning electric device (19) to the lower position. - Select any unit (18) among the plurality of tape supply units (18) arranged in parallel on the actual parts supply stand (13).
) so that it faces the turntable (10).
The supply stage 13) has already moved along the tape (16) wound on the reel (17).
The film on its upper surface is peeled off by a peeling mechanism (not shown), and the chip component (15) is located directly below the suction nozzle (31).

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

First, the suction station (A
), the lower end of the suction nozzle (31) chucks the chip component (15) from the tape supply unit (18).In the station (A), the suction head (12)
The lower end of the suction nozzle (31) must be lowered to the height level of the tape (16), which means that the cam member <20
) The head (12) is mounted on a vertical rail (not shown) that is movable up and down and is disposed at the interrupted part of the cam (22) of the head (12).
) The upper end roller (24>) is placed on the suction nozzle (3) of the suction head (12).
1), filter (35), and storage chamber (4) for the cylindrical body (27).
0), communication passage 44), communication chamber (43), joint (57) communicating with the communication chamber (43) via seal backing (61), hose (42), connection hose (62)
, valve chamber (72), horizontally elongated intake passage (64), cylindrical part (21)
This is done by connecting the central air intake passage (65) of the 1000 and a vacuum pump (not shown) to form a vacuum circuit.

Next, the suction head (12) that has risen from the suction level moves to the roller (2) that slides on the cam (22) of the cam member (20).
4) to the second working station (B).

In this station (B), a photosensor <117) detects whether or not the suction nozzle (31) is suctioning the chip component (15), and the suction nozzle (31) is previously controlled by a control device I (not shown). The chip component (15) is rotated by a rotary device while being sucked in the direction programmed by the rotation device.That is, as shown in FIG. (50) are in pressure contact and the drive motor (52) rotates, thereby rotating the rotary roller (50) by a predetermined angle via the belt (53).After this rotation, the rotary roller (50)
0) leaves the suction nozzle (31). In this way, the chip component (15) is rotated in advance before positioning so as to be oriented in the mounting direction.

Next, at the work station (C), at the second work station (B), the suction nozzle (31)
If the photosensor (117) detects that the suction head (15) is not suctioned, 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 a drive source (not shown) so that the state shown in FIG. 11 becomes the state shown in FIG. 10, the second lever (76)
swings, and the roller (78) that was engaged with the second recess (81) of the first louver (75) crosses over the protrusion (82) and engages with the first recess (80). Therefore, the 7th ruber (7
5) is also rotated clockwise, and the valve body 6 is rotated by the spring (69).
8) closes the horizontally long intake passage (64).
) moves. As a result, the suction nozzle (31) is connected to the hose (42), the connecting hose (62), the valve chamber (72), and the valve stem (
It communicates with the atmosphere through the side hole (71) of 66) and the atmosphere connection passage (70).

The next work station (D) (E) (F) is a stage 5 for positioning the chip component (15).
According to the shape of the positioning station (D) (E) (F) according to a predetermined program, the positioning unit (88) (90) (91) (115) (
116) is already determined according to the chip component (15) when it is picked up at the suction station (A>). For example, the right positioning unit at the positioning station (E) If (91) is selected, the drive cylinder (92) will lock the cylinder? (
99) along the guide rail (95).
93) moves by the distance (Ll), the position is determined by the forward limit stopper (101), and the suction nozzle (31
) The unit (91) has already been moved before the nozzle (31) reaches the position directly below the nozzle (31). At this time, stations (D) and (F) become idle stations.

The positioning operation of this chip component (15) will be explained below. First, the pusher (103) is connected to the cam (not shown).
When the pins (104) (
108) as a fulcrum, and the positioning claw (106)
) (109) (112) (113) open, and the suction nozzle (31>
24) on which the upper and lower rails (not shown) are lowered, and when the button shear (103) is lowered, the claws (106), (109), (112), and (113) are lowered.
), positioning is performed from all sides, and after the bushing (103) rises again, the upper and lower rails rise, and the suction nozzle (31) also rises. After this, the turntable (10) will rotate intermittently for one division.

Next is the detection station (G), where the suction nozzle (31)
A photosensor (118) detects whether the chip component (15) is being attracted and whether it is being attracted in the normal position.
(119). The sensor (119> can be swung by a drive motor (120), and the chip component (119)
Although the suction posture in step 5) is checked, the presence or absence and posture of the component may be detected by one sensor.

At the ninth work station (1), the suction nozzle (31
) will be rapidly lowered at level 2, which will be explained based on FIGS. 19 and 20. First, in the state shown in FIG. 19, the upper cam (22A) and the upper and lower rails (121) are on the same level, and the roller (24) moves onto the upper and lower rails (121), and then moves onto the upper and lower rails together with the shaft (125). (
121) descends and is connected to the lower cam (22B) at the same level. Then, the roller (24) is moved to the lower cam (
22B>, the pressing member (127) moves to the roller (
126). Then, as shown in Fig. 20, the upper and lower rails (121) rotate against the spring (123), and then the rails (121) rise together with the shaft (125) to be at the same level as the upper cam (22A). At the same time, the pressing member (127) also moves away from above the roller (126).

At the next 10th work station, the mounting station (J), the chip component (15) is mounted on a printed wooden board on the XY table 4). For this reason, the suction nozzle (31) descends to the substrate via vertical rails (not shown) and mounts the substrate.

That is, the aforementioned photosensor (117) is connected to the chip component (1
5), and the photosensor <118) at the detection station (G) also detects the presence, but only when the photosensor (119) determines that the suction posture is normal. The switching valve (63) is operated as shown in FIG. The photosensors (117) and (118) are mounted as described above by communicating with the atmosphere through the valve stem (66) and blowing high-pressure air from the atmosphere side end of the valve stem (66). 15
), or if the sensor (119) determines that the suction posture is abnormal, the suction nozzle (31) does not descend and does not mount.

The next stage 5 (K) (L) (M) is an idle station. At the discharge station (N), the suction nozzle (31) is
detects the presence of the chip component (15), but when the photosensor (119) determines that the suction posture is abnormal, the chip component (15) is ejected by the lower end of the suction nozzle (31). That is, as mentioned above, the vacuum circuit is cut off and high pressure air is blown into the end of the valve stem (66).

At this time, dirt such as dust sucked in from the lower end of the suction nozzle (31) is blocked by the filter (35) and remains in the space (36) of the filter case (37), so the mounting station described above (J) and discharge station (N), the dust is discharged from the lower end of the nozzle (31) and filtered (35).
) and the surrounding area will be automatically cleaned.

Therefore, the next time a vacuum circuit is formed, the circuit will not be clogged with dust or the like.

At the next station (0), 3 of the suction head (12)
Which nozzle (31) of the book suction nozzles (31) is being used is detected by a sensor (not shown).

At the next nozzle selection station (P), which suction nozzle (
31) Select whether to use (31) (31);
Regarding this selection, when using chip parts (15) of the same shape and size, the same suction nozzle (31
), but it is possible to change them sequentially. Also, when using small chip-like parts or large chip-like parts, it is necessary to replace them with the corresponding suction nozzle. It is something you can choose.

Describing this selection operation, that is, the operation of the connection switching device (49), the joint <57) is connected to the other communication chamber (43).
If the lever (55) is rotated by a drive mechanism (not shown), the joint (57) and the pawl (5
6) are separated from the cylindrical body (27) and the gear (30), a gear (not shown) meshes with the gear (30), and the gear is driven by the drive mechanism (not shown) to drive the bearing (2
The cylindrical body (27) is rotated through the cylindrical body (27) through the cylindrical body (27). During this rotation, the presser lever (46) is rotated downward by the engaging member (4th), so that all the suction nozzles (31) (
31) (31") is allowed to descend, and into the communication chamber (43) corresponding to the selected suction nozzle (31),
Move the lever (5) so that the join 1- (57) is in communication.
Rotate 5) to engage the claw (56) and gear (30),
It is completely sealed by the seal backing (61). In addition, the suction nozzle (31) is returned by the spring (45) so that the presser lever <46) comes into contact with the flange surface (47) of the other suction nozzle (31), and the suction nozzle (31) rises to the zero-order stay (Q) ( R) is an idle station.

(G) Effects of the Invention Because of the above-described features, the present invention provides a method for selecting and switching an arbitrary nozzle from among multiple types of suction nozzles depending on the shape of a chip-shaped electronic component, etc. In addition to being able to reliably seal the vacuum circuit connection with the
Moreover, it is possible to extend the life of the members related to this connection.

[Brief explanation of the drawing]

1 to 23 are views showing one embodiment of the present invention, in which FIG. 1 is a plan view showing a rotation device and a positioning device, FIG. 2 is a front view of an automatic mounting device, and FIG. Figure 3 is a plan view of the automatic loading device, Figure 4 is a side view of the automatic loading device, Figure 5 is a vertical cross-sectional view of the turntable, Figure 6 is a vertical cross-sectional view of the suction head, and Figure 7 is a suction head. FIGS. 8 and 9 are partial longitudinal cross-sectional views of the suction head to show the rotation of the nozzle; FIGS. 10 and 11 are plan views of the cylindrical body, etc. to show that the cylindrical body can rotate; 12 is a plan view of the positioning device, FIG. 13 is a side view of the positioning device, FIG. 14 is a vertical sectional view of the main part of the positioning unit, FIG. FIG. 16 is a plan view showing the relationship between the positioning claw and the chip component, FIG. 17 is a diagram showing the vertical displacement of the suction nozzle, and FIG. 18 is a diagram showing the operation at work stations (I) and (J). The side view, FIGS. 19 and 20 are diagrams showing the operation of the upper and lower rails,
Fig. 21 is a side view of the automatic mounting device showing the state where the XY table is above, Fig. 22 is a side view of the automatic mounting device showing the state where the XY table is lowered, and Fig. 23 is a side view of the automatic mounting device showing the state where the XY table is placed above the 3A and 3B each show a side view of the automatic mounting device shown moved to a lower position. (4)...XY table, (10>...turntable, (12)...suction head, (15>...chip parts, (18>...tape supply unit, (19)
...Positioning device, (31) ...Suction nozzle, (5
0)... Rotating roller, (52)... Drive motor, (
53)...Belt.

Claims (1)

[Claims] (1) An automatic electronic component mounting device that automatically mounts chip-shaped electronic components to predetermined locations on a printed circuit board, which includes a turntable that has an inlet passage connected to a vacuum source and is rotated intermittently. , a connecting body having one end connected to the air intake passage of the table and having a sealing member at the other end, and a plurality of types of suction nozzles supported vertically movably on the table and for suctioning various electronic components. a suction head in which a communication path is formed corresponding to the nozzle, and a connection that allows the other end of the connecting body to be brought into contact with and separated from the head so that the other end of the connecting body can communicate with any of the communication paths; An automatic mounting device consisting of a switching device.