JPS63174399A - 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) Industrial Application Field The present invention is designed to perform various tasks at each work station while intermittently rotating a turntable that is equipped with a plurality of suction nozzles around the periphery for suctioning electronic components in the form of chips. The present invention relates to an automatic mounting device that mounts the component onto a printed circuit board at a mounting station after positioning the component at a positioning station.

(B) Conventional technology In a conventional device of this type, as disclosed in Japanese Patent Laid-Open No. 59-155199, a vacuum circuit to the suction nozzle is formed from a suction station that suctions chip-shaped electronic components to a mounting station. Therefore, if the electronic component cannot be suctioned, vacuum will leak from the suction nozzle.

Therefore, a problem arises in that the vacuum pressure of the nozzle that is suctioning another component decreases, and the position of this component shifts. Furthermore, leakage from dust may cause the suction station to be unable to suction.

(c) Problems to be Solved by the Invention In view of the problems of the prior art mentioned above, the present invention solves the problem in cases where the suction nozzle is unable to suction, or even if the suction nozzle does, the electronic component falls before it is mounted. The purpose is to eliminate the negative effects caused by vacuum leaks when

(d) Means for solving the problem To this end, the present invention provides a means for detecting the presence or absence of a component sucked by a nozzle at a work station before the positioning station, and also includes a means for detecting the presence or absence of parts sucked by the nozzle at a work station before the positioning station. A work station in front of the mounting station is provided with a detection means for detecting the presence and posture of a component that has been sucked into the nozzle, and when the presence detection means in front of the positioning station detects that there is no component, a switching valve is provided. is operated to cut off the vacuum circuit to the suction nozzle, and when the presence detection means or detection means detects an abnormality, the vacuum circuit is not cut off at the mounting stage 5.

(e) Once the operational vacuum circuit has been formed, a chip-shaped electronic component is suctioned by a suction nozzle at a suction station, and at a subsequent work station, a presence/absence detection means detects whether or not the nozzle is suctioning a component; If it detects no air, the switching valve is allowed to operate and the vacuum circuit to the suction nozzle is cut off in the next work step. If the part is suctioned, the part is positioned at a subsequent positioning station, and at a work station after the positioning station, another detection means detects whether or not the part is suctioned again, and detects the suction posture. If an abnormality is detected, the vacuum circuit is not interrupted at the mounting station.

Kube) 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). One end of the device (3) is supported by a support shaft (5), and the device (3) can be rotated and opened.
6), said supply conveyor (2)
When the printed circuit board is transported by the
7) (8) rotates about the support shaft (5) and descends, and the device (3) moves to the right in FIG. 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. 4) The printed circuit board on the supply conveyor (2) is replaced on top.

Said replacement equipment! The XY table (4) on which the printed circuit board from (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. (10) is a turntable which is attached to an index unit (11) rotated by a drive motor (not shown) and can be rotated intermittently. Further, 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 stand that is movable along a horizontally long rail (14), and a tape (16) for storing chip components (15), which are chip-shaped electronic components, at equal intervals is wound around a reel (17), and the components are distributed. a tape supply unit (supplying means) configured to feed out the tape (16) at every arrangement pitch;
8) are installed in parallel. (19) is a chip component (15
) is a positioning device for positioning the printed circuit board before it is mounted (mounted) on the printed circuit board. In addition, the XY table (4
) is lowered to lower the turntable (10).
It is possible to move in the X-axis direction and the Y-axis direction below the positioning device (19) (see FIG. 23).

Next, based on FIGS. 5 and 6, the turntable (
10) and the suction head (12) will be described in detail. (
20) is a hollow circular part for table guidance that 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). This is a cylindrical cam member. The cam member (20) has a cam (
22) is formed, and a spring <23
), the roller (24) as a sliding part provided at the upper end of each suction head (12) rotates while being pressed against it, and each suction head <12) is rotated according to the shape of the cam (22).
rotates with the turntable (10) while moving up and down. That is, each suction rod (12) has a pair of guide rods (
25) is erected vertically movably penetrating the turntable (10), and a mounting member (26) on which a roller (24) is rotatably provided is fixed to the upper end of the wire rod (25).

Therefore, each suction head (12) has a turntable (1
0) so that it can move up and down.

Next, while moving up and down relative to the turntable (10), the suction pads <1> rotate together with the turntable (10).
2) will be explained in detail. First, the cylindrical body (27) is rotatably held via a bearing (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. Also, at the upper end of the nozzle (31) is a dust removal filter (35) that can be inserted and removed from the upper opening (34).
and a space (3) below the filter (35).
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 spring (39).

Therefore, when replacing the filter (35), it is only necessary 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 a spring (39) is rotatably provided at the upper end of the storage chamber (40), and the spring (39) urges the nozzle 31 downward. . 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 predetermined angles, and the filter storage portion 38) is also provided with a storage chamber (40) as described above. Three are formed respectively.

Further, three communication chambers 43) are formed on the circumferential side of the cylindrical body (27) and can communicate with a hose (42) as a connecting body communicating with the vacuum pump. It communicates with the storage chamber (40) via a passageway (44). Therefore, only one suction nozzle (31) is connected to the storage chamber (4).
0), the other two suction nozzles (31>) which are connected to the hose 42) through the communication path (44) and the communication chamber (43) and which do not perform suction operation are connected to the spring (45). The flange surface (47) is pushed upward by the presser lever (46) which is urged upward by the presser lever (46). (48> is an engagement for pushing down the lever (46) It is a member.

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 morph (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 is swingable about the pin (54) is engaged between the teeth of a gear (30) provided on the cylindrical body (27), so that the cylindrical body (27)
7) and a claw (56) that prevents rotation of the hose (42).
) is integrated with the joint (57).

(58) is a locking body, a spring (59) is provided between the locking body (58) and the lever (55), and 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 claw 0) is provided at the step 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 pawl (56) is biased by the spring (59) and meshes with the gear (30), the packing (
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 interrupt the vacuum circuit by the vacuum pump. An atmospheric communication passage (70) that does not penetrate the valve body 68 side is provided in the valve stem (66>), and the communication passage (70)
) is provided with a side hole (71) on the side near the valve body (68), allowing communication between the valve chamber (72) and the atmosphere. In other words, the valve body (
When the valve body (68) closes the intake passage (64), the valve chamber (72) is connected to the atmosphere through the side hole (71) and the communication passage (70), and the valve body (68) closes the intake passage (64). 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 a pin (73).
The second lever (7) is pivotally supported by
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 (80) and the second recess (81) of the first louver (75) beyond the protrusion (82).

In addition, blow high pressure air 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 (10) is arranged at each work station (A) to (
R), but the positioning station (D) (E)
(F) are provided with positioning devices (83), (84), and (85), respectively. The positioning device (83) has a conventional structure, so it will be briefly explained, but a belt (89) is stretched between the output shaft pulley (87) of the drive motor (86) and the positioning unit (88). 0 positioning station (E) (F) where the positioning claw is rotatable
Regarding the positioning devices (84) and (85), the 0 positioning device (84), which will be explained based on FIGS. 12 and 13 by taking the device 84) as an example, has two positioning units (90>(91) and said unit (90) (9
1) is a drive cylinder (9) according to a control device program determined in advance according to the size of the chip component (15).
2) by the suction nozzle (
31) to the position directly below the unit (90) (91).
) is movable. The unit (90) (91
) is rotatably provided with respect to the frame (93),
The frame (93) moves in a straight line when its two pairs of guides (94) abut the guide rails (95) from the sides and slide.

The units (90) and (91) include the frame (93
) are arranged with a gap (Ll) at the tip of the unit (90) (91) and the output shaft pulley (97) of the drive motor (96) provided on the frame (93). A belt (98) is stretched, and as the pulley (97) rotates, the units (90) and (91) can rotate in synchronization with each other. 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 the inscription interval (L
a reverse limit stopper <101) fixed to the fixed part of the cylinder (92) so as to be the same distance as l);
It can be restricted by the forward limit stopper (102). Therefore, the center of the suction nozzle (31) and the positioning unit (
If the centers of the unit (90) are aligned, the drive cylinder (92) is activated and the unit (91) is automatically replaced, and 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 pushbutton (103) is raised by a cam (not shown), the first opening/closing plate (105) moves to the positioning pawl (106) using the pin (104) as a fulcrum.
Since it rotates in the opening direction, the second opening/closing plate (107) also opens the bottle (108) in conjunction with the rotation of the first opening/closing plate (105).
When the button shear (103), which rotates using the fulcrum as a fulcrum to open its pawl (109), descends, both pawls (106) (10
9) 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 of claws (112) and (113) have a similar structure for opening and closing. Further, (114) is a stopper which limits the closing direction of the opening/closing plate (105). These positioning claws (106) (109) (112) (113
) is the direction in which the chip component (15) that has been completely suctioned by the suction nozzle (31) is rotated while the turntable (10) is rotating, that is, when the component (15) is mounted on the printed circuit board. The drive motor (
96), and when the suction nozzle (31) descends, 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) by 180 degrees, 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), it is placed in the positioning units (88), (90), and (91) at any of the stations.
) (115)<116), which unit is selected depending on the size and shape of the chip component (15), according to the program of the control device. Furthermore, at stations other than the selected 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, FIG. 17 shows the vertical displacement of the suction nozzle (31), and the work stations (A), (D), and (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 lower and lower rails (not shown)
This becomes possible by arranging the .

Also, work stations (A>, (B), (C), (D
>, (E), (F), (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 photosensors (119) as detection means that are oscillated and rotated by a drive motor (120) to detect the suction posture. Since it is located below the suction nozzle (31), the component (15) must be conveyed at a high level. Especially at station H), since the chip component (15) is mounted on the printed circuit board, the component (15) must be suctioned to just above the printed circuit board. The nozzle (31) must be lowered.

Therefore, at station (ri), it is lowered to level Z, and the next station (J) is started from level 2. Regarding its structure, see the 18th
This will be explained in detail based on FIGS. 19 and 20. In Fig. 18, the status of work stations (H) and (1) is shown from the right. Due to the rotation of the turntable (10), the suction that has traveled from station (H) on the cam (22) The roller (24) at the upper end of the rad (31) is connected to the upper and lower rails (
121) Transfer to the top and be carried to the next station (!). Regarding the structure of this upper and lower rail (121), the first
This will be explained in detail based on FIGS. 9 and 20. Upper and lower rails (12
1) can be swung around the pin (122) as a fulcrum;
The upper and lower rails (121) are biased by the springs (123).
) is in contact with the shaft (125) at the top in FIG. 19. 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 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>
When the roller (126) is pushed down, 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) is interrupted at the portion where the upper and lower rails (121) are disposed, and one end side and the other end side of the interrupted portion are not in the vertical positional relationship. Since there is a significant difference, a vertical rail (121) is provided at the interrupted part to move it up and down. In the state shown in FIG. 19, the cam (22A) located 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).
1) The upper and lower rails (121) move down 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 then the rails (121) rise and the upper cams (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 in the X-axis direction and Y-axis 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, the position of the chip component (15) may be optically detected and the suction nozzle (31) rotated. 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.

First, the printed circuit board is placed on the supply conveyor (2) and transported to the reloading device! When reaching the lower position of ff1 (3), the conveyor (2) stops. Then, the pair of feed claws (7) and (8) rotate down using the spindle (5) as a fulcrum, and the right claw (7) attaches the left end of the printed circuit board on the XY table (4). The claw (8) is connected to the conveyor (2).
This engages the left end of the printed circuit board that is being transported. After that, change your clothes! (3) moves from the supply conveyor (2) along the rail (6) to the XY table (
4), and at the same time, the board on the table (4) is also transferred to the discharge conveyor (9).
Move to the right.

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). ), the turntable (10) and the positioning device (19) are moved to a lower position. On the other hand, an arbitrary unit (18
) so that it faces the turntable (10).
The supply table (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 rotated by the motor, and the turntable (10) is intermittently rotated.

First, the suction station (A
), the chip component (15) is sucked and chucked from the tape supply unit ('18) by the suction nozzle (31>) at the lower end.
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).
) is carried out by placing the roller (24) at the upper end. This adsorption is carried out by the adsorption nozzle (3) of the adsorption herad (12).
1), filter (35), and storage chamber (4) for the cylindrical body (27).
0), a communication path (44), a communication chamber (43), a joint (57) communicating with the communication chamber (43) via a seal backing (61), a hose (42), and a connection hose (62).
, valve chamber 72), horizontally elongated intake passage (64), cylindrical part (21)
This is achieved 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 stage 5 (B), a photosensor <117) detects whether or not the suction nozzle (31) is suctioning the chip component (15), and the suction nozzle (31) is preliminarily controlled by a control device (not shown). ) The chip component (15) is rotated by a rotating device while being attracted to the chip component (15) in a programmed direction. That is, as shown in FIG. 7, the rotary roller (50) is brought into pressure contact with the protrusion (51) of the suction nozzle (31) from the outside, and the drive motor (52) rotates, thereby causing the suction nozzle (31) to pass through the belt (53). The rotating roller (50) rotates by a predetermined angle. After this rotation, the rotating roller rough 50
) leaves the suction nozzle (31). In this way,
Before positioning, the chip component (15) is rotated in advance 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) also rotates clockwise, and the spring (69) causes the valve body (6
8) closes the horizontally long intake passage (64).
) moves. As a result, the suction nozzle 31) includes 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 stations (D), (E), and (F) are positioning stations for the chip component (15).
According to the shape of the positioning station (D), (E), or (F) is specified according to a predetermined program, and the positioning unit (8g) (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) (91) is selected, the drive cylinder (92) causes the lock)'(
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 (3
The unit (91) has already been moved before the nozzle (31) reaches the position directly below the blade of 1).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).
, the first and second opening/closing plates (105, 107) move against the spring (111), respectively, into the bottles (104) (
108) as a fulcrum, and the positioning claw (106)
) (109) (112) (113) open, and the suction nozzle (31) is moved by the roller (
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 pusher (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 is connected to the chip component (1
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
) is suddenly lowered to the Z level, which will be explained based on FIGS. 19 and 20. First, in the state shown in Fig. 19, the upper cam (22A) and the lower rail (121) are the same l
- Located on the bell, the roller (24) is the upper and lower rail (121)
Then, the upper and lower rails (121) descend together with the shaft (125) and are connected to the lower cam (22B) at the same level. When the roller (24) moves onto the lower cam (22B), the pressing member (127) pushes down the roller (126).Then, as shown in FIG. 20, the upper and lower rails (121) resist the spring (123). and rotate,
Thereafter, the rail (121) rises together with the shaft (125) to be at the same level as the upper cam (22A), and the push-down member (127) moves away from above the motor roller (126).

At the next tenth work station, the mounting station (J), a chip component (15) is mounted on a printed circuit board on an 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) also detects the presence at the detection station (G), but only when the photosensor (119) determines that the suction posture is normal. As shown in Fig. 10, the switching valve (63) is operated, the horizontally long intake passage (64) is closed by the valve body (68), and the valve chamber (72) is connected to the atmosphere communication passage (66) of the valve stem (66). The photosensor (117) (11g) is 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). Parts (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 station (K) (L)CM) is an idle station. At the discharge station (N), the suction nozzle (31) is detected by the photo sensor (117) (11B).
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 or large chip-like parts, the selection should be made in place of the corresponding suction nozzle. It is something that can be done.

To describe this selection operation, that is, the operation of the connection switching device (49), the joint (57) is connected to another communication chamber (43).
When connecting the joint (57) and the pawl (5), the lever (55) is rotated by a drive mechanism (not shown).
6) are separated from the cylindrical body (27) and the gear (30), a gear (not shown) meshes with the gear (30), and the bearing (2) is driven by the gear by a drive mechanism (not shown).
The cylindrical body (27) is rotated through the cylindrical body (27), and during this rotation, the presser lever (46) can be rotated downward by the engaging member (48), so that all suction nozzles (31) (
31) (31'') is lowered, and into the communication chamber (43) corresponding to the selected suction nozzle (31),
The lever (55) is connected so that the joint (57) communicates with the lever (55).
) is rotated to engage the pawl (56) and gear (30), and a complete seal is created by the seal backing (61). Further, the presser lever (46) is returned by the spring (45) so that it comes into contact with the flange surface (47) of the other suction nozzle (31), and the suction nozzle (31) ascends to the zero-order station (Q) ( R) is an idle station.

(g) Effects of the Invention As described above, the present invention prevents vacuum from leaking when the suction nozzle fails to suction, or when an electronic component falls off before being mounted even after suction. This can reliably prevent the occurrence of situations where the vacuum pressure of other suction nozzles drops and the position of the component shifts or the suction station cannot pick it up.

[Brief explanation of the drawing]

1 to 23 each show an embodiment of the present invention 1-
In the figures, Fig. 1 is a plan view showing the rotation device and positioning device, Fig. 2 is a front view of the automatic mounting device, Fig. 3 is a plan view of the automatic mounting device, and Fig. 4 is also a plan view of the automatic mounting device. A side view of the device, FIG. 5 is a vertical sectional view of the turntable, FIG. 6 is a vertical sectional view of the suction head, FIG. 7 is a partial vertical sectional view of the suction head to show rotation of the suction nozzle, and FIG. Figure and 9th
The figure is a plan view of the cylindrical body etc. to show that the cylindrical body is rotatable, FIGS. 10 and 11 are cross-sectional plan views to show the switching valve, and FIG. 12 is a plan view of the positioning device. 13th
The figure is also a side view of the positioning device, FIG. 14 is a vertical cross-sectional view of the main part of the positioning unit, FIGS. 15 and 16 are cross-sectional views showing the relationship between the positioning claw and the chi/y part parts, and FIG. 17 18 is a side view showing the movement of the suction nozzle in the upper and lower levels, FIG. 19 and 20 are views showing the movement of the upper and lower rails, and FIG. 22 is a side view of the automatic mounting device showing the XY table in the upper position, FIG. 22 is a side view of the automatic mounting device showing the XY table in the lowered state, and FIG. 23 shows the XY table in the lower position below the turntable, etc. 3A and 3B each show a side view of the automatic mounting device in a moved state. (4)...XY table, <10)...turntable, (12)...suction head, (15)...chip component, (18>...tape supply unit, (19)
...Positioning device, (31) ...Suction nozzle, (5
0)... Rotating roller, (52)... Drive motor, (
53)...Belt.

Claims (1)

[Claims] (1) Various operations are performed at each work station while intermittently rotating a turntable equipped with multiple suction nozzles on the periphery for suctioning chip-shaped electronic components, and after positioning at the positioning station, the mounting station places the components on the printed circuit board. In the automatic mounting device for mounting the above-mentioned parts,
Presence/absence detection means is provided for detecting the presence or absence of a component suctioned by the nozzle at a work station before the positioning station, and a means for detecting the presence or absence of a component suctioned by the nozzle at a work station after the positioning station and before the mounting station. A detection means for detecting presence and posture is provided, and when the presence detection means in front of the positioning station detects that the part is not present, a switching valve is operated to cut off the vacuum circuit of the suction nozzle in front of the positioning station. The automatic mounting apparatus is characterized in that the vacuum circuit is not interrupted at the mounting station when the presence/absence detection means or the detection means detects an abnormality.