JPH04311099A - Component mounting equipment - Google Patents

Abstract

PURPOSE:To enable a component mounting equipment to discriminate that a suction nozzle fails to suck a chip component or not and the chip component is fed to a suction position or not. CONSTITUTION:When the groove 34 of a rotor 35 is made to stop at a chip presence check station by making the rotor 35 pivot, it is detected by a component presence detection sensor provided just above the check station that a chip component 4 is present in the groove 34 or not. At this point, when it is detected that the chip component 4 is present in the groove 34, it is detected that a suction nozzle fails to suck the chip component 4 when the suction nozzle 4 sucks no component.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is directed to a chute in which chip components guided and aligned are pushed into a groove at a component separation position of a rotary separator provided at the outlet of the chute, and the rotary separator is rotated. The present invention relates to a component mounting device in which a component is attracted to a suction nozzle from the groove at a component suction position reached and mounted on a printed circuit board.

0002

[Prior Art] This type of component mounting device was developed in U.S. Pat.
It is disclosed in Japanese Patent No. 21671. This publication discloses a technique for detecting whether or not the suction nozzle is suctioning a chip component by providing a component presence/absence detection means in the movement path of a suction nozzle that suctions a component.

0003

[Problems to be Solved by the Invention] However, in the above-mentioned prior art, when the component presence/absence detection device detects the absence of a chip component, even though the chip component is supplied to the position where the suction nozzle should pick it up, the suction nozzle It is not possible to determine whether this was due to a suction error in which the component could not be suctioned, or whether it was a supply error in which the chip component was not supplied to the position where it should be suctioned. Therefore, even if the component presence/absence detection device detects the absence of chip components and stores them in the storage device as management data, it is not possible to tally up whether it is a suction error or a supply error, and the device The drawback was that the operating conditions could not be fully grasped.

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to distinguish between a mistake in picking up a chip component by a suction nozzle and a mistake in feeding a chip part by a component supply device.

[0005]

[Means for Solving the Problems] Therefore, in the present invention, chip components guided and aligned in a chute are pushed into a groove at a component separation position of a rotary separation body provided at the outlet of the chute, and the In a component mounting device in which a component is sucked from the groove into a suction nozzle and mounted on a printed circuit board at a component suction position reached by rotation of the body, rotation of the rotary separation body from the component separation position to the component suction position A component presence/absence detection means is provided for detecting the presence or absence of a chip component in the groove during the movement path of the groove.

[0006]

[Operation] After the chip components in the chute are pushed into the groove at the component separation position of the rotating body, until the groove moves from the component separation position to the component suction position due to rotation of the rotating body,
A component presence/absence detection means detects the presence or absence of a chip component within the groove.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, (1) is the X-axis motor (2)
and an XY table that moves in the XY direction by rotation of a Y-axis motor (3), on which a printed circuit board (5) on which a chip-shaped electronic component (4) (hereinafter referred to as a chip component or component) is mounted is placed. Ru.

Reference numeral (6) denotes a supply stand, which includes a tape feeder (7) that supplies chip components (4) sealed in a tape (not shown) and chip components (4) stored in bulk.
A large number of bulk cassette feeders (8) are disposed for supplying the cassettes. (10) is a supply table drive motor;
By rotating the ball screw (11), the supply table (6) is connected to the linear guide (1) via a nut (not shown) fitted to the ball screw (11) and fixed to the supply table (6).
2) Move under the guidance of.

(13) is a turntable that rotates intermittently, and a suction nozzle (1
4) are arranged at equal intervals in accordance with the intermittent pitch.

The suction nozzle (14) is connected to the tape feeder (7).
) or parts (4) from the bulk cassette feeder (8).
) is the stopping position of the mounting head (15) which picks up and takes out the sample.
) descends and picks up the part (4).

The position in the horizontal plane where the suction nozzle (14) suctions the component (4) is hereinafter referred to as the component suction position.

The position where the mounting head (15) stops next to the suction station due to the intermittent rotation of the turntable (13) is the component presence/absence detection station. (
14) detects the presence or absence of the component (4) to be attracted.

The next position where the mounting head (15) stops is a recognition station, and at this station, the component recognition device (17) recognizes the positional deviation of the component (4) to be attracted by the suction nozzle (14). .

The next mounting head (15
) is stopped at the angle correction station, and the suction nozzle (14) is stopped based on the recognition result by the recognition device (17).
) is rotated in the θ direction by the nozzle rotation roller (18), and the positional deviation of the rotation angle of the component (4) is corrected.

The next stop position of the angle correction station is
This is a mounting station, and the printed circuit board (5) is mounted with the component (4) that is attracted by the suction nozzle (14) of the station.

The position where the mounting head (15) stops due to the intermittent rotation of the turntable (13) one position before the suction station is the nozzle selection station, and the head (15) is rotated by the head rotation roller (19). Then, the suction nozzle (14) that is to suction the next supplied part (4) is selected.

Next, the component presence/absence detection device (16) will be explained based on FIG. 3.

Reference numeral (20) denotes a light emitting section that irradiates a light beam onto the component (4) sucked by the suction nozzle (14). (2
1) is a light receiving section provided opposite to the light emitting section (20), and receives the light beam emitted from the light emitting section (20). When the suction nozzle (14) is not suctioning the part (4), the light beam emitted by the light emitting part (20) is received by the light receiving part (21), it is detected that the part (4) is not suctioned, and the part (4) is not suctioned. When the nozzle (14) is sucking the component (4), the light emitted by the light emitting section (20) is blocked by the component and the light receiving section (21)
) is detected to be attracted to the component (4) without being received by the component (4).

Next, the bulk cassette feeder (8) will be explained based on FIGS. 1 and 5 to 13.

In FIG. 9, reference numeral (23) denotes a locate pin that is fitted into a positioning hole (not shown) in the supply table (6) to position the bulk cassette feeder (8) on the supply table (6). A bulk case (24) stores the chip components (4) in a separate state, and is detachably attached to the upper part of the bulk cassette feeder (8). The parts (4) in the bulk case (24) fall through the first chamber (25) and the second chamber (26) and enter the chute (27).
Arrange in a line inside.

(29) is a chamber compressed air supply hole provided at the bottom of the second chamber (26), and (30) is a chute compressed air supply hole provided at the inlet side of the chute (27). Both supply holes communicate with a valve (31), and when compressed air is supplied by opening and closing the valve (31), compressed air ejected from the supply hole (29) accumulates in the second chamber (26). chip parts (4)
The compressed air is blown at the entrance of the chute (27) so that it does not get clogged, and the compressed air jetted out from the supply hole (30) causes the parts (4) aligned in the chute (27) to flow into the chute (27).
act to move toward the exit side.

(32) is a part (4) in the chute (27).
) is a vacuum suction hole provided to suck the bottom surface of the holder, and vacuum suction is always achieved. Further, the compressed air supplied from the chute compressed air supply hole (30) is transferred to the component (4) to be stopped by the vacuum suction of the suction hole (32).
It has enough pressure to move the liquid to the exit side of the chute (27).

[0024] At the outlet of the chute (27), there are grooves (34) for inserting the parts (4) at 90 degree intervals as shown in Fig. 6.
A rotor (35) with a notch is provided. The groove (
The width of the rotor (35) in the rotating direction, which is the frontage of the part (34), is slightly wider than the width of the component (4). shoot(
27) The part (4) guided inside is the chute (27)
The following part (4) is pushed into the groove (34) located at the exit of the part. The component (4) is placed on the chip component placement surface (36) within the groove (34), and when the rotor (35) rotates, it slides and moves on the placement surface (36). do. Therefore, the mounting surface (36) is designed to have low friction so that the component (4) can move smoothly, and is a metal surface in this embodiment. (It may be made of plastic or the like as long as it can move smoothly.) When the part (4) is fed into the groove (34), it rotates 90 degrees clockwise in Fig. 6 and stops. The first part (4) is the chute (2
A groove (34) separated from and next to the part (4) in 7) is located at the outlet of the chute (27), and the part (4) is similarly fed into the groove (34). ing.

The valve (31) is opened and closed by the rotor (3).
This is done in synchronization with the intermittent rotation of 5), and the groove (34)
stops at the outlet of the chute (27) and then opens the valve (31).
) is opened and the part (4) is pushed out, and the rotor (35) is closed before it begins to rotate.

Next, after the chip parts (4) accumulated in the second chamber (26) are blown apart as described above,
A mechanism for applying vibration by hitting the bulk cassette feeder (8) from above so that it lines up in the chute (27) without getting stuck will be explained.

The mechanism is provided on the main body side of the component mounting apparatus constituted by this embodiment. The main body side of the component mounting apparatus herein refers to the main body of the apparatus other than the tape feeder (7) and bulk cassette feeder (8) of the apparatus described above.

In FIG. 4, (37) is a striking stick cam that is rotated by a drive source (not shown) that drives the turntable (13), and is attached to a lever (39) that swings about the support shaft (38). Supports the provided cam follower (40). A beating rod (42) is supported on a support shaft (41) provided on the lever (39), and the lever (39) is supported by a spring (41).
43). (44) is a guide that guides the vertical movement of the beating stick (42). The cam (
37) rotates once every intermittent rotation of the turntable (13), and the hitting rod (42) hits the feeder (8) when the valve (31) is opened to unclog the chip component (4). We are helping to eliminate it.

Further, as shown in FIG. 17, in the tape feeder (7), a swing arm (not shown) swings every time the feed lever (62) reciprocates, and a sprocket ( 94) intermittently feeds the tape (95) enclosing the chip component (4), and the component (4) is taken out by the suction nozzle (14). ) is covered with a cover tape (96) to prevent the parts ( ) from flying out, and the parts (
The cover tape (96) is peeled off and wound onto a peel-off reel (98) so that the tape 4) can be removed. The beating stick (4
2), as shown in FIG. 17, the cover tape (
While the cover tape (96) is being peeled off, the cover tape (96) is not wound up on the peeling reel (98) after being peeled off.
It is also used to continue pushing down a predetermined position of the reel (98) and move upward when the rotation of the reel (98) is completed to create slack in the cover tape (96). This cover tape (96)
By creating slack in the tape (95), the cover tape (96) covering the chip component (4) to be next attracted can be prevented from being peeled off when the tape (95) is next fed by the sprocket (94). The part (4) is prevented from flying out until it is sucked by the suction nozzle (14). Then, this lowered nozzle (14) is attached to the cover tape (
The cover tape (96) is wound up with the peeling reel (98) while the folded portion of the tape (96) is lightly pressed and the beating rod (42) presses the cover tape (96) as described above. The nozzle (14) attracts and takes out the chip component (4).

Next, a mechanism for rotating the rotor (35) in the bulk cassette feeder (8) will be explained.

In FIGS. 5 to 9, (46) is a rotor shaft to which the rotor (35) is attached, and is rotatably supported by a bearing (47). A pinion (48) is fitted below the rotor shaft (46) so as to be rotatable independently of the rotation of the shaft (46), and the pinion (48)
A ratchet bracket (49) that rotates together with the pinion (48) is fitted into the upper part of the pinion.

[0032] A ratchet wheel (50) that rotates together with the rotor shaft (46) is attached to the upper part of the ratchet bracket (49).
Ratchet brackets (
A ratchet (52) attached to 49) is engageable. (54) is a ratchet lock pawl;
The ratchet wheel (55) is biased by the spring (55), swings, and engages the groove (51) of the ratchet wheel (50).
0) is prevented from rotating in the opposite direction.

(56) is fitted to the pinion (48) to rotate the pinion (48), and is connected to the guide roller (56).
6A) and a guide body (56B), and is always biased toward the right in FIG. 5 by a compression spring (57). ) restricts its movement to the right. The swing arm (58) is swingable about the arm support shaft (60), and is supported by a tension spring (61).
) is biased to swing to the left in FIG. Since the biasing force of the tension spring (61) is stronger than the biasing force of the compression spring (57), the swing arm (58) and the rack (56) are biased to the left in FIG.

[0034] The swing arm (58) is connected to the tension spring (61).
As shown in FIG. 4, the feed lever (62), which is swung rightward in FIG. 5 against the urging force of The feed swing lever (65) and the tension spring ( 66), it moves in the left-right direction in FIG. The reciprocating movement of the feed lever (62) is performed when the bulk cassette feeder (8) or tape feeder (7) stops at the component suction position every time the turntable (13) rotates intermittently.

The stop position of the groove (34) where the parts (4) are fed from the chute (27) is hereinafter referred to as the "chip separation station", but at the next stop position rotated 90 degrees from the chip separation station, the groove ( 34) is checked to see if there is a component (4) therein, and this stopping position is called the "chip presence/absence detection station".

When the bulk cassette feeder (8) stops at the component suction position, a component presence/absence detection sensor (68) is installed on the main body side, as shown in FIGS. 4 and 1, directly above the chip presence/absence detection station. The sensor support arm (69) is attached to the sensor support arm (69). The sensor (6
8) uses a reflective sensor in this embodiment, and detects the presence or absence of the component (4) by reflecting different light depending on the presence or absence of the chip component (4).

The suction nozzle (14) for suctioning the component (4) of the suction station is located directly above the chip suction station of the rotor (35), and the sensor (68) is located on the rotor (35).
), and as shown in Figure 4, the sensor support arm (69) extends inward from the outside of the head (15), so the suction nozzle (
14), and even if the turntable (13) rotates, the sensor (68) and sensor support arm (69)
) does not collide with the suction nozzle (14) or the head (15). Also, the sensor (68) and sensor support arm (6
9) is provided at a position where it will not collide with the tape feeder (7) and the cassette feeder (8) even when the supply table (6) moves.

The stop position of the next groove (34) of the chip presence/absence detection station due to the rotation of the rotor (35) by 90 degrees is the point at which the suction nozzle (14) suctions the component (4) in the groove (34). "Chip adsorption station".

Before the nozzle (14) descends onto the chip component (4), the component (4) is raised by a certain amount from the chip component mounting surface (36) by the push-up rod (71) having a damper effect. The thrusting rod (71) is configured to descend and absorb the shock that the nozzle (14) hits the component (4).The vertical movement mechanism of this thrusting rod (71) will be explained.

In FIG. 10, a cylindrical push-up rod (71) whose tip has a horizontal surface so as to easily support the lower surface of the component (4) is drilled into the chip component mounting surface (36) of the chip suction station. The installed chip component (4) passes through an opening (72) large enough to prevent it from falling, but a retaining ring (74) is fixed to the push-up rod (71).
A compression spring (75) is attached below the push-up rod (74) through which the push-up rod (71) passes and provides a damper effect to the push-up rod (71).

Reference numeral (76) denotes a push-up lever, which swings in the vertical direction as the main body push-up lever (78) moves up and down with the lever support shaft (77) as a fulcrum. As shown in FIG. 11, the main body push-up lever (78) is provided on the main body side below the component suction position, and has a push-up cam (79) driven by a drive source that rotates the turntable (13) intermittently.
As the lever (78) rotates, the lever (78) rotates around the main lever support shaft (
80) in the counterclockwise direction in FIG. 11 against the spring (81), and is urged by the spring (81) to swing clockwise. The vertical movement of the main body thrusting lever (78) is performed in accordance with the suction operation every time the turntable (13) is rotated intermittently.

Furthermore, even if the lever (78) swings, if the tape feeder (7) is stopped at the component suction position, the tape feeder (7) is prevented from colliding with the lever (78). The shape of the tape feeder (7) is formed. In addition, the lever (78) is used to push up the push-up rod when the tape feeder (7), which pushes up the component (4) enclosed in the tape and takes it out with the suction nozzle (14), is in the component suction position. used for.

[0043] The push-up lever (76) is connected to the push-up bar (71).
) passes through the collar (8) and supports the compression spring (75).
2), and the push-up rod (71) is moved up and down via the compression spring (75) by the up-and-down movement of the push-up lever (76). When the collar (82) rises and the push-up rod (71) rises, the retaining ring (74) engages the retaining ring regulating surface (8).
3), the compression spring (75) is compressed by the rise of the collar (82).
) pushes up the part (4) to a predetermined height position determined by the attachment position of the retaining ring (74) to the push-up rod (71), and stops it in a state with a damper effect by the compression spring (75). .

(84) is a downward compression spring, and a retaining ring (
74) and the compression spring (75), and as the collar (82) rises, it is compressed between the collar (82) and the retaining ring regulating surface (83), and the push-up lever (76)
) descends, it pushes down the collar (82) and the compression spring (75) is uncompressed.
) The lower surface of the collar (82) engages with the ring (85) fixed at the position of the push-up bar (71) directly below the push-up bar (71), thereby pushing the push-up bar (71) below the chip component mounting surface (36). lower to.

Next, the mounting position of the push-up rod (71) in the plane direction will be explained.

When the push-up rod (71) pushes up the chip component (4), as shown in FIGS. 12 and 13, the groove (3)
The opening (72) and collar are arranged so that the center of the push-up rod (71) passes through a position a distance α apart from the center line of the groove (34) in the rotational direction of the rotor (35), which is the width direction of item 4). (82) is provided. By doing this, it is possible to always press the chip component (4) against the chip positioning reference surface (86) and suppress variations in the direction of rotation of the groove (34), and the nozzle (14) can always press the chip component (4) against the chip positioning reference surface (86). ) can be adsorbed at a certain position. If this distance α is too large, when the push-up rod (71) pushes up the chip component (4), the component (4) may be tilted too much or even rotated by 90 degrees. is suction nozzle (14)
The range is such that it is tilted to such an extent that there is no problem in attracting the part (4).

A groove (34) is formed on the right side of the groove (34) in FIG. 12 so that the chip component (4) is pushed up at a constant position not only in the width direction of the groove (34) but also in the front-back direction perpendicular to this. The push-up rod (71) may be mounted offset from the center of the chip so that the chip component (4) is pressed against the inner surface of the groove (34) on the left side of FIG.

In FIG. 6, the next stop position of the chip suction station in the groove (34) due to the rotation of the rotor (35) is the ``missed adsorption chip discharge station'', and the bottom of the groove (34) of this station is Chip ejection box (87
) is provided, and the chip parts (4) that were not picked up are
) falls and is ejected. If it is not discharged, the chute (27) or the chute (
This is because there is a risk that it may get caught in the first chip component (4) aligned in line 27).

Next, the control system of the component mounting apparatus constructed according to this embodiment will be explained based on FIG. 14.

[0050] (88) is a CPU, and a RAM (89)
Various operations related to the operation of mounting the chip component (4) on the printed circuit board (5) are controlled according to a program stored in the ROM (90) based on various data stored in the ROM (90). The interface (91) connects the CPU (88), the component presence/absence detection device (16), the component presence/absence detection sensor (68), and the like. (92) is a CRT that displays various data such as the failure to pick up the component (4).

The operation of the above configuration will be explained below.

First, before the automatic operation of the component mounting device, the operator presses the feed lever (6) of the bulk cassette feeder (8).
2) is manually pulled and fed so that the chip component (4) is stored in the groove (34) of the chip separation station and chip presence/absence detection station of the rotor (35). In addition, the chute (
27) from the second chamber (26) side to the outlet side,
Chip components (4) are arranged in succession.

[0053] When automatic operation starts, RAM (89)
The tape feeder (7) or bulk cassette feeder (8) supplies the component (4) to be sucked next to the suction nozzle (14) according to the mounting data (not shown) stored in the feed table drive motor (10). is moved along the linear guide (12) and stopped at the component suction position.

At this time, it is assumed that the third bulk cassette feeder (8) from the right in FIG. 2 stops at the component suction position.

Next, the component presence/absence detection sensor (68) detects the presence/absence of the component (4) in the chip presence/absence detection station. Detect. and RAM (89)
In this field, the detection result of the sensor (68) regarding the bulk cassette feeder (8) indicating the presence of parts is stored.

Next, when the mounting head (15) is moved to the suction station by the rotation of the turntable (13), the feed lever (62) moves to the right side in FIG. (61), the compression spring (57) moves the rack (56) along the guide roller (56A) and the guide body (56B), and the pinion (48) is rotated. . As a result, the rotation of the ratchet bracket (49) causes the ratchet (
52) rotates the ratchet wheel (50). At the position where the ratchet wheel (50) has rotated 90 degrees, the rack (56) is stopped by a stopper (not shown), the ratchet wheel (50) stops rotating, and at this position, the ratchet is biased by the spring (55). The lock pawl (54) engages with the wheel groove (51) of the ratchet wheel (50). In this way, when the rotor shaft (46) on which the ratchet wheel (50) is attached rotates 90 degrees, the rotor (3
5) is rotated 90 degrees, the groove (34) of the chip presence/absence detection station is moved to the chip suction station, and the groove (34) of the chip presence detection station is moved to the chip suction station.
The component (4) in 4) slides on the component placement surface (36) and moves to the station.

Next, when the feed lever (62) returns to the left side in FIG. 9, the swing arm (58) returns to the pinion (48).
The ratchet (52) also returns to its original position, but the ratchet wheel (50) does not rotate because it is locked by the ratchet lock pawl (54), and the rotor (35) maintains the rotated position.

Next, the operation of the rotor (35) at each stop station after the rotor (35) has stopped will be explained.

First, at the chip separation station, the chip component (4) is stored in the groove (34).

That is, the parts (4) lined up in the chute (27) are vacuum-suctioned from the vacuum suction hole (32), and the rotor (35) begins to rotate and the groove (34) reaches the chip separation station. Until it rotates more, the pressure to press the first part (4) is not working, but the rotor (
35) stops rotating, the valve (31) is opened, compressed air is discharged from the chute compressed air supply hole (30), and the chip component (4) in the chute (27) is discharged against the vacuum suction force. Push and feed the leading part (4) into the groove (34).

On the other hand, compressed air is simultaneously ejected from the chamber compressed air supply hole (29) and from the chute compressed air supply hole (30), and the chip parts (4) accumulated in the second chamber (26) are When the valve (31) is closed, the loosened parts (4) fall, and some of them enter the chute (27). The part (4) that has entered this chute (27) is
), the part (4) is missing between the chute (27) inlet and the supply hole (30).
Slide down the chute (27) by falling under its own weight and reach the chute (27).
27) and prepare for the discharge of compressed air when the rotor (35) next rotates. At this time, after the discharge of compressed air is finished, the vacuum suction hole (32) sucks the component (4) above it and is blocked, and the other component (4)
Do not inhale.

[0062] Furthermore, when the valve (31) is opened,
As the beating rod cam (37) rotates, the lever (39) is urged by the spring (43) and swings downward, and the beating rod (42) is guided by the guide (44) and lowered to the bulk cassette feeder (8). Hit near the center. This vibration facilitates unclogging of the components (4) within the chute (27) and the second chamber (26). Moreover, when the valve (31) is closed, the extrusion pressure of the part (4) in the chute (27) is eliminated.

Next, the component presence/absence detection operation performed at the chip presence/absence detection station will be explained.

When the rotor (35) stops rotating, the component presence/absence detection sensor (68) located directly above the station is activated.
) is caused by the reflection of the light beam on the top surface of the part (4), causing the groove (34) to
Detects the presence or absence of part (4) inside, but part (4)
is in the groove (34), so the presence of the component is detected.
This result is stored in RAM (89).

In the above explanation, component presence/absence detection at the chip presence/absence detection station is performed before and after the rotation of the rotor (35), but the detection operation before the rotation of the rotor (35) is as follows. After the automatic operation starts, if the detection is performed only before the first rotation of the rotor (35) for each cassette feeder (8), the detection will be performed at the time of the previous component removal and the result will be stored in the RAM (89). I won't do it because it will. Alternatively, only the detection operation before rotation of the rotor (35) may be performed.

Next, the operations performed at the chip suction station will be explained.

After the rotation of the rotor (35) has stopped, the body thrust lever (78) is rotated by the rotation of the thrust-up cam (79).
) moves upward, and the push-up lever (76) moves up against the lever support shaft (77
) as a fulcrum in the clockwise direction in FIG. 10 to push up the collar (82) against the downward compression spring (84). This pushes up the compression spring (75) that engages on the collar (82), and pushes up the retaining ring (74) to which the spring (75) is attached.

As a result, the push-up rod (71) becomes part (4).
The retaining ring (74) rises while pushing up, and the retaining ring (74) reaches the retaining ring regulating surface (8
3) Stop at the position regulated by. At this time, as shown in FIGS. 12 and 13, the push-up rod (71) pushes up the groove (34) with a shift of α from the center position in the direction of rotation, so the part (
4) is pushed up while being pressed against the chip position reference surface (86) opposite to the one where the push-up rod (71) is deviated.

In parallel with this thrusting operation, the suction nozzle (
14) is lowered by a vertical movement drive means (not shown), comes into contact with the component (4) pushed up by the push-up rod (71), and further descends. The nozzle (14) is connected to a compression spring (75).
The descending speed is reduced by the damper action of the nozzle (14), and the impact caused by the contact of the nozzle (14) is absorbed, and the part (4)
is pressed against the chip position reference surface (86) and descends until it comes into contact with the component mounting surface (36). Thereafter, the suction nozzle (14) ascends while suctioning a predetermined position of the component (4).

Note that the reason why the component (4) is lowered until it comes into contact with the component mounting surface (36) is to ensure that the component (4) can be picked up in a horizontal and stable position. If the posture is stable with only support, the component should be placed on the component placement surface (36) in order to avoid the impact when the component (4) comes into contact with the component placement surface (36), even if it is weakened. The nozzle (14) may rise before contact.

On the other hand, when the main body thrusting lever (78) descends after the component (4) is attracted, the lowering compression spring (84
), the ring (85) is pressed against the lower surface of the collar (82), and the push-up rod (71) is also forced to move against the rotor (3).
5) Lower to a position where it does not interfere with rotation.

In this way, a series of operations were performed by rotating the rotor (35) by 90 degrees.
), the mounting head (15) has a turntable (1
3) Moves to the component presence/absence detection station by intermittent rotation.

When the mounting head (15) stops at the station, the parts (4) sucked by the suction nozzle will
As shown in FIG. 3, the light emitted from the light emitting part (20) is blocked and not received by the light receiving part (21), and the part (4)
The presence of the component is detected by the component presence/absence detection device (16).

Next, the mounting head (15) is stopped at the recognition station by the intermittent rotation of the turntable (13). At this station, the component recognition device (17) recognizes the positional deviation of the component (4) to be attracted by the suction nozzle (14), and at the next stop station, the angle correction station, the nozzle rotating roller (18) removes the component. (4
) is corrected.

[0075] After that, the part (4) sucked by the suction nozzle (14) is moved to the X-axis motor (2) at the mounting station.
Then, by rotation of the Y-axis motor (3), the printed circuit board (5) on the XY table (1) is mounted on the moved XY table (1) with correction for positional deviation added.

On the other hand, when the mounting head (15) holding the first picked-up component (4) rotates to the component presence/absence detection station, the next mounting head (15) moves to the pickup station.

During this intermittent rotation, the tape feeder (7) or bulk cassette feeder (8) supplies the next component (4) to be sucked in the same manner as described above.
moves to the suction position of component (4), but 2 from the right in Figure 2
It is assumed that the bulk cassette feeder (8) stops at the suction position of the component (4).

Then, the presence or absence of the component (4) is detected at the chip presence/absence detection station, the rotor (35) is rotated, and the same operation as described above is performed at each station of the rotor (35). It will be done. In this way, the component (4) is suctioned at the suction station.
Parts (4) consecutively from the same cassette feeder (8)
When the suction is performed, the discharge of compressed air from the air supply hole (29) stops, and the blown-up chip component (4) falls inside the second chamber (26) and enters the chute (27). However, if the timing of the entry is delayed because it gets tangled with other parts (4) at the entrance of the chute (27) or enters after the posture has been corrected, the next air supply hole ( The compressed air discharged from the chute (26) may be blown back into the second chamber (26) or
27), and gradually became unable to enter the chute (27).
) decreases in number of parts (4). Even if the other tape feeder (7) or cassette feeder (8) moves to the component suction position and continuous supply is stopped, the second
The parts (4) accumulated at the bottom of the chamber (26), except those that first entered the chute (27),
7) The number of parts (4) lined up in the chute (27) does not increase because they overlap at the entrance and do not fall. Then, when the cassette feeder (8) again stops at the parts suction position and continuously supplies parts (4), the number of parts (4) in the chute (27) decreases again. When the parts (4) are aligned only on the outlet side of the chute (27) than the position of the vacuum suction hole (32), the discharge of compressed air from the air supply hole (29) stops. After that, the part (4) that flew up in the second chamber (26) is affected by suction force and falls faster than its own weight and enters the chute (27).
Even inside the air, they slide down faster than they fall under their own weight, so they line up without passing through the air supply hole (30) and being returned before the discharge of compressed air from the next air supply hole (30) begins. Therefore no more parts (4) in chute (27)
does not decrease, and the supply of component (4) is achieved.

As described above, the chip component (4) is supplied and mounted on the printed circuit board (5), but after the component presence detection sensor (68) detects the presence of the component, the next step is to The cassette feeder (8) moves to the suction position of the component (4), and the groove (34) in which the presence of the component is detected is
), the suction nozzle (14) sucks the component (4). When the head (15) rotates intermittently, the presence/absence of the component (4) suctioned by the suction nozzle (14) is detected by the component presence/absence detection device (16).

As a result, when the absence of part (4) is detected, the CPU (88) determines that there is a suction error based on the result of the presence of part (4) by the sensor (68) stored in the RAM (89). 15 in a predetermined area in the RAM (89).
Number of bulk cassette feeder (8) “R1”
, the number "M1" of the mounting head (15) and the nozzle (14)
) number "N1" and the date and time when the suction error occurred are stored for each case. The cassette feeder (8) stops at the component suction position and moves the chip component (4) that has not been sucked to the rotor (35) to feed the next component (4).
) is rotated, it falls into the chip ejection box (87) at the suction error ejection station and is ejected.

In this way, the suction errors may be stored and the apparatus may be stopped when the suction errors for the same bulk cassette feeder (8) or the same mounting head (15) number exceed a set number. In that case CR
It may also be possible to display on the screen of T(92) that the stoppage is due to a suction error. However, it is necessary to set the time point at which to start counting suction errors.

Next, one bulk cassette feeder (8) on the supply stand (6) moves to the component suction position, and the component (4) is placed in the groove (34) of the chip separation station in the chute (27). If the part (4) is not being fed due to blockage, etc., the rotor (35) rotates and fills the groove (34).
After the chip stops at the chip presence detection station, the component presence detection sensor (68) detects the absence of the component (4). Then, this result is stored in the RAM (89) as a supply error by storing the cassette number "R2", date, and time, as shown in FIG. 16, for example.

The data shown in FIG. 16 and the data shown in FIG. (92) and is used for maintenance and inspection of the equipment.

Next, as described above, the sensor (68)
When detecting the absence of the component (4), the mounting head (15) stopped at the nozzle selection station selects the suction nozzle (14) to be used next by the head rotating roller (19). Since the part (4) to be picked up next has been determined, this head (15) picks up the part (4) to be picked up. And the sensor (
68) detects the absence of part (4), the part (4) is still missing.
4) When the head (15) stopped at the nozzle selection station is rotated to the suction station, the sensor (68) picks up the part (4).
The cassette feeder (8) detecting the absence of the component is moved to the component suction position, and the feed lever (62) is operated without lowering the suction nozzle (14) to rotate the rotor (35).

In this way, the sensor (68) detects the component (
If the presence of 4) is detected, the next head (15) will be in the normal operating state, but for the head (15) that did not lower the suction nozzle (14), each subsequent head (15) up to the mounting station will be in a normal operating state. Prevent the station from operating.

In this case, when the absence of component (4) is detected again, it is stored in the RAM (89) in the same manner as in FIG. , causing the rotor (35) to rotate. Then, for the same cassette feeder (8), the third part (4
), the device stops. On the CRT (92), the number of the cassette feeder (8) and the fact that the sensor (68) has detected the absence of the component (4) are displayed as "feeding error".

Furthermore, if the same cassette feeder (8) is detected to be empty three times in a row, there is a high possibility that the component is out of stock, so the CRT (92) screen displays the out-of-parts message at the same time or only for the same cassette feeder (8). You may do so. or
Other possible causes such as clogging in the chute (27) may be listed and displayed. Further, it may be possible to set the number of times a component is detected to be stopped. Also, the start of counting of the detection of absence by the sensor (68) of the component (4) for stopping the device can be set after the same cassette feeder (8) has been stopped once, or can be set by the operator. Just do it like this. Furthermore, if the absence of a component (4) is detected and the component (4) to be picked up by the next head (15) is a component (4) supplied from the same cassette feeder (8), The nozzle (14) of the head (15) is not lowered, but only the rotor (35) is rotated, and the nozzle (14) of the next head (15) is selected for the cassette feeder (8); Parts (4
) can be taken out. As for the nozzle (14) that should pick up the component (4) in the groove (34) where the absence of the component (4) has been detected, the detection device (16) at the component presence detection station of the turntable (13) Detection operation should not be performed.

[0088] If the swing arm (58) of the bulk cassette feeder (8) is not manually fed before automatic operation, the sensor (68) will initially detect the absence of the part (4), so the above-mentioned If the rotor (35) is rotated again like this, no problem will occur, but in this case, the RAM (
89), the detection result indicating that no parts are present may not be stored as management data.

In addition, even if the swing arm (58) is not moved by hand, if the cassette feeder (8) is newly installed or replaced after parts have run out, the nozzle ( 14), rotate the turntable (13), operate only the feed lever (62) without lowering the nozzle (14), and move the swing arm of the new cassette feeder (8). (58) may be oscillated, each rotor (35) may be rotated once, and the component (4) may be sent to the chip presence/absence detection station of the rotor (35). This is valid even if the sensor (68) is not provided.

Furthermore, if the drive source for driving the feed lever (62) is provided independently rather than from the turntable (13), when the sensor (68) detects the absence of the component (4), If the feed lever (62) is driven again without rotating the turntable (13), the rotor (35) can be rotated.

Furthermore, in this embodiment, the groove (
Although the sensor (68) is provided above the chip presence/absence detection station of 34), a reflective sensor may be provided below the station in the cassette feeder (8), or a sensor (68) may be provided above the station in the cassette feeder (8). A light emitter and a light receiver may be provided at the lower part of the station and at the position of the sensor (68), and the presence or absence of the component (4) may be detected using transmitted light.

Furthermore, in this embodiment, the grooves (34) of the rotor (35) are provided at four locations every 90 degrees, and the chip presence/absence detection station is located at the rotation stop position of the rotor (35) next to the chip separation station. However, if the rotor is provided with grooves for storing parts in five or more places, or even if the parts (4) are adsorbed in four places, the position of the suction mischip chip ejection station in this embodiment is used as a chip suction station.
The presence or absence of a component may be detected at any stop position between the chip separation station and the chip suction station.

Furthermore, the presence or absence of the component (4) is detected immediately after the chip component (4) is supplied at the chip separation station, or the component (4) is detected at the chip suction station.
4) may be detected immediately before adsorption. Further, a sensor is provided at any position where the groove (34) between the chip separation station and the chip adsorption station moves,
The presence or absence of the part (4) within the groove (34) may be detected while it is moving without stopping.

In this embodiment, the vacuum suction hole (32) was arranged after the chute compressed air supply hole (30) with respect to the traveling direction of the component (4) in the chute (27). When reversed, the parts (4) that were aligned on the chamber side of the compressed air supply hole (left side in Figure 9) move to the chamber side due to the discharge of compressed air, and then the parts (4) in the chamber When the object moves due to its own weight and vacuum suction, it moves to the vacuum suction hole, but
Due to the vacuum suction, a force is applied to stop the compressed air at that point, and the compressed air suction hole is no longer aligned, which causes a problem in the supply. However, instead of performing vacuum suction all the time, if you intermittently synchronize with the discharge of compressed air and turn off the vacuum when the falling chip parts are sufficiently accelerated, the vacuum suction hole ( 32
) may come first.

Further, it is preferable that the chute compressed air supply hole (30) be closer to the second chamber (26) so that falling parts (4) are less likely to be returned.

Furthermore, in this embodiment, the vacuum suction hole (32
), the hole (32) is blocked by the part (4) and the falling part (
Although the suction force cannot be applied to the chute (27), in order to prevent the part (4) from blocking all of the suction holes (32), the suction holes ( 32) may be extended and drilled to increase the sliding speed of the component (4) that always falls from the second chamber (26).

[0097]Although the end surface of the push-up rod (71) supporting the part (4) was made into a horizontal plane, the part (4) was made into a round shape.
) may be made easier to press against the chip position reference surface (86). In this way, even if the suction nozzle (14) suctioning the part (4) becomes unstable when the part (4) is being pushed up, the push-up rod (71)
) is lowered due to the compression of the component (4), and the component (4) is placed on the component mounting surface (36
), it will be adsorbed in a stable state.

Further, when the chip component (4) is sucked by the suction nozzle (14) at the chip suction station of the rotor (35), the push-up rod (71) moves the component (4) onto the component placement surface (36). ), the impact from the suction nozzle was absorbed by the action of the compression spring (75), but when the component (4) was placed on the chip suction station, the mounting member supported by the compression spring etc. from below was It is provided separately from the mounting surface (36), and when the component (4) is moved by the rotation of the rotor (35), it is at the same height as the component mounting surface (36), and the suction nozzle (14) When it comes into contact with the component (4) and descends, the spring may contract and absorb the impact while descending.

Further, in this embodiment, the groove (34) is cut out in the entire thickness direction of the rotor (35) so that the chip component (4) falls into the chip ejection box (87) at the suction mischip ejection station. All grooves should be shaped so that parts can be placed on the rotor without notches, and if the push-up rod (71) moves upward at the suction station, a hole should be made for the rod (71) to pass through. . In this case, either the rotor is installed at an angle and the chip ejecting station that fails to pick up the chip slides on the groove and falls into the chip ejecting box (87), or the chip that is incorrectly picked up again without the ejecting station is 4) should be used.

[0100]

Effects of the Invention As described above, the present invention can determine whether or not the chip component is being supplied to the position where the suction nozzle should pick up the chip component. It is possible to identify errors in the supply of chip parts, and by aggregating this data, it is possible to accurately grasp the operating status of the device.

[Brief explanation of drawings]

FIG. 1 is a sectional view taken along the line XX in FIG. 6 showing a component presence/absence detection sensor.

FIG. 2 is a plan view of a component mounting device equipped with a bulk cassette feeder to which the present invention is applied.

FIG. 3 is a side view of the component presence/absence recognition device.

FIG. 4 is a side sectional view of the component mounting device at a component suction position.

FIG. 5 is a side view showing a rotor rotation mechanism of the bulk cassette feeder.

FIG. 6 is a plan view of the vicinity of the rotor of the bulk cassette feeder.

FIG. 7 is a plan view of the rotor rotation mechanism of the bulk cassette feeder seen from below.

FIG. 8 is a plan view of the ratchet rotation mechanism seen from below.

FIG. 9 is a side view of a bulk cassette feeder as a component supply device to which the present invention is applied.

FIG. 10 is a side sectional view showing a push-up mechanism of the push-up rod.

FIG. 11 is a diagram showing a mechanism on the component mounting device side for pushing up the push-up rod.

FIG. 12 is a plan view showing a state in which a push-up rod is pushing up a chip component at the chip suction station.

13 is a sectional view taken along the Y-Y arrow in FIG. 12, showing a state in which a push-up rod pushes up a chip component at the chip suction station; FIG.

FIG. 14 is a control block diagram of the present invention.

FIG. 15 is a diagram showing suction error data.

FIG. 16 is a diagram showing supply error data.

FIG. 17 is a diagram showing a state in which the cover tape is peeled off from the tape of the tape feeder.

[Explanation of symbols]

(4) Chip-shaped electronic components (chip components) (5)
Printed circuit board (14) Suction nozzle (27) Chute (34) Groove (35) Rotor (rotating separator)

Claims (1)

[Claims] Claim 1: The chip components guided and aligned in the chute are pushed into a groove at the component separation position of a rotary separator provided at the outlet of the chute, and the rotary separator rotates to pick up the components that have arrived. In a component mounting device in which a component is attached to a printed circuit board by being sucked from the groove by a suction nozzle at a position, the groove is attached to the groove midway through the movement path of the groove due to the rotation of the rotary separator from the component separation position to the component suction position. 1. A component mounting device comprising a component presence/absence detection means for detecting the presence or absence of a chip component in the component mounting device.