JPH0269999A - Rotary head type apparatus for mounting electronic parts - Google Patents

Abstract

PURPOSE:To make it possible to satisfactorily secure time for correcting position deviation of electronic parts in the theta direction and improve mounting efficiency by providing a motor for rotating each nozzle in a plurality of transfer heads. CONSTITUTION:In a supply section 10, a transfer head 7 that picks up electronic parts P moves to an exterior observation apparatus 11 by an intermittent rotation of a rotary head 2 in the N direction, and the position off-set of parts P attracted at the lower end of a nozzle 8 in the xytheta directions are detected. The position off-set in the theta direction is corrected by driving a motor 16 provided on each nozzle to rotate the nozzle 8 in the correction area in which the transfer head 7 reaches the board 6 from the apparatus 11. Thus, theta correction can be made with affordable time and mounting efficiency is improved.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rotary head type electronic component mounting apparatus,
Multiple transfer heads equipped on the rotary head,
By providing a motor that rotates each nozzle, it is possible to prevent positional deviation in the θ direction of electronic components attracted to the nozzles.
This allows correction to be made slowly within a wide area with plenty of time.

(Prior Art) As an electronic component mounting apparatus, one equipped with a rotary head is known. The rotary head is equipped with a large number of transfer heads along its circumferential direction, and in the electronic component supply section, the electronic components are adsorbed to the lower end of the nozzle of the transfer head, and the intermittent rotation of the rotary head
This electronic component is transferred to and mounted on a board positioned on the mount section.

By the way, as described above, the electronic component attracted to the nozzle has a positional shift in the xyθ directions, and this positional shift must be corrected before mounting on the board. FIG. 4 is a plan view of a conventional rotary head, and FIG. 5 is a partial side view, in which 100 is a rotary head, 101
102 is a transfer head, 102 is a supply section for electronic components such as tape units and trays, 103 is a positioning section for the substrate 104 consisting of an XY child table, 105 is an appearance observation device, 106
is the θ correction gear, and 107 is the nozzle 1 of the transfer head 101.
This is a gear installed coaxially with 08, and its operation will be explained next.

The transfer head 101 that has picked up the electronic component P in the supply unit 102 is transported by the intermittent rotation of the rotary head 100 in the N direction. Positional deviation of part P in xyθ direction △X, Δy, △θ
is detected. The transfer head 101 further includes a positioning section 1
The transfer head 101 is transferred to the substrate 104.
By moving the xy child table 03 by ΔX, Δy before reaching , the positional deviation ΔX, Δy of the electronic component P in the xy force direction is corrected. Correction in the θ direction is performed as follows. That is, the gear 107 of the transfer head 101
When the rotary head 100 reaches a position facing the correction gear 106 and the intermittent rotation of the rotary head 100 stops, the gear 10
6 is meshed with the gear 107 and the nozzle 108 is mounted on the 104 that rotates around its axis, it may be necessary to rotate the nozzle by an arbitrary angle (for example, 180° as shown in the figure), and in this case , the gear 106 must rotate the nozzle 108 by 180°+80. To rotate the nozzle 108 by 1809+Δθ in this way,
Since the motor that drives the gear 106 has a slow start-up characteristic, it takes a considerable amount of time (for example, 0.3 seconds). Therefore, the stop time of the rotary head 100, which rotates intermittently, is required to be at least this long, and the rotational speed of the rotary head 100 has to be slowed accordingly, resulting in a problem that the mounting speed cannot be increased. Also, in an extremely short period of time as described above, the nozzle 108 can be rotated at an angle of 180°.
When the nozzle 108 is rotated by +Δθ, the electronic component P attracted to the lower end of the nozzle 108 tends to be thrown off from the nozzle 108 or become misaligned due to rotational centrifugal force.

Therefore, in the present invention, the θ of the electronic component attracted to the nozzle is
It is an object of the present invention to provide means capable of securing sufficient time for correcting positional deviation in the direction, and increasing the rotational speed of a rotary head to increase mounting efficiency.

(Means for Solving the Problems) For this purpose, the present invention provides a seed-tally head type electronic component mounting apparatus in which a plurality of transfer heads equipped on a rotary head are provided with nozzles centered on the axis line. A motor for rotating the transfer head is provided, and a positional deviation correction area in the θ direction is formed between the external appearance observation device provided on the transfer path of the transfer head and the mount section by the drive of the motor.

(Function) In the above configuration, the electronic component attracted to the nozzle in the supply section is sent to the appearance observation device by intermittent rotation of the rotary head, and its positional deviation is observed. The displacement in the θ direction is performed by driving a motor installed in the transfer head to rotate the nozzle in the θ direction. This correction in the θ direction is performed slowly in a wide correction area while the transfer head moves from the external observation device to the mount section.

(Example) Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of an electronic component mounting apparatus, in which 1 is a main body box, 2 is a rotary head rotatably attached to the bottom of the box 1, 3 is an XY child table, and 5 is a mount for electronic components. Department. 6 is a board positioned on the mount section 3, and the board 6 is an XY child table.

5 slides in the xy force directions. A large number of transfer heads 7 are arranged in parallel along the circumferential direction on the lower surface of the rotary head 2, and each transfer head 7 is provided with a nozzle 8 that projects downward.

FIG. 2 is a plan view of the rotary head 2, and 10 is a supply section for electronic components P such as a tray and tape unit arranged on the opposite side of the mount section 3. Through the intermittent rotational operation and the vertical movement of the nozzle 8, the electronic component P of the supply section 10 is attracted to the lower end of the nozzle 8, and transferred to and mounted on the substrate 6. 11 is the supply section 10
This is an external appearance observation device disposed between the mount section 3 and the mount section 3, and detects a positional shift in the xy.theta. directions of the electronic component P attracted to the lower end of the nozzle 8. The number of pitches between the appearance observation device 11 and the substrate 6 is six, and the space between them constitutes a positional deviation correction area A in the θ direction. Next, referring to Figure 3,
The detailed structure of the transfer head will be explained.

12 is a motor provided at the top of the rotary head 2;
Reference numeral 13 denotes an index, which causes the rotary head 2 to rotate intermittently around the shaft 14. 7 is the transfer head, 8 is its nozzle, and a spline 15 is erected on the top thereof. Reference numeral 16 denotes a motor, which rotates the nozzle 8 in the θ direction around the axis via a timing belt 17, boolean IJs 18 and 19, a shaft 20, a timing belt 21, and pulleys 22 and 23, and is attracted to the lower end of the nozzle 8. The positional deviation of the electronic component P in the θ direction is corrected. As shown in FIG. 2, a large number of transfer heads 7 arranged in parallel on the rotary head 2 are each equipped with a motor 16 that rotates a nozzle 8. By driving each motor 16, each nozzle 8 is rotated. can be rotated individually.

26 is a rod that is located inside the rotary head 2 and reciprocates horizontally; 27 is an arm that is driven by this rod 29 and swings around the bin 28; and 29 is pivotally attached to the tip of the arm 27. The roller 30 is a slider, and a row 29 is fitted into the groove thereof, and the slider 30 is moved up and down along a vertical shaft 31 by the reciprocating movement of the rod 26. 32 is a roller that fits into the other groove of the slider 30, 33 is a roller connected to this roller 32, 34 is a bracket, and 3536 is a shaft suspended from this bracket 34, and this shaft 35.36 and the above-mentioned The transfer head 7 is connected by a bracket 37. When the slider 30 moves up and down as described above, the shaft 35.
36 is raised and lowered, and the transfer head 7 connected thereto is also raised and lowered, and the nozzle 8 picks up the electronic component P and mounts the electronic component P onto the board 6.

This device has the above-mentioned configuration, and its operation will be explained next.

In the supply section 10, the transfer head 7 that has big-amplified the electronic component P is moved to the appearance observation device 11 by the intermittent rotation of the rotary head 2 in the N direction, and transfers the electronic component P attracted to the lower end of the nozzle 8. Positional deviation △x in xyθ direction
5 △y△θ is detected. Positional deviation in xy force direction △X△
y is corrected by moving the XY child table 5 by the same amount in the XY force direction. Further, the positional deviation Δθ in the θ direction is corrected by driving the motor 16 to rotate the nozzle 8. Here, as described above, when the electronic component P is rotated by 180 degrees in order to change the mounting direction on the board 6, the amount of rotation is 180 degrees plus Δθ.

This rotation is performed in the correction area A while the transfer head 7 reaches the substrate 6 from the appearance observation device 11. As mentioned above, the number of pitches in the positional deviation correction area A in the θ direction from the appearance observation device 11 to the substrate 6 is 6, and therefore, for example, if one pitch feeding time is 0.2 seconds, the pitch is 1°2.
There is a margin of seconds, during which the nozzle 8 can be rotated by slowly driving the motor 16 with a margin of time.

(Effects of the Invention) As explained above, the rotary head 2 electronic component mounting apparatus according to the present invention has a plurality of transfer heads equipped on the rotary head equipped with a motor that rotates the nozzles around the axis. Since the area between the external observation device and the mount section is used as a positional deviation correction area in the θ direction due to the drive of this motor, the long area during which the transfer head moves from the external observation device to the substrate is corrected in the θ direction. As the misalignment correction area, the nozzle can be rotated slowly and with time to correct the positional misalignment in the θ direction. Therefore, even with a small and low capacity motor, the θ correction can be performed with plenty of time. By increasing the intermittent rotation speed of the rotary head, electronic components can be mounted on the board at high speed.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a perspective view of a rotary head type electronic component, Fig. 2 is a plan view of the rotary head, and Fig. 3 is a sectional view of the rotary head.
4 and 5 are a plan view and a sectional view of a rotary head of a conventional device. Transfer of board to rotary mount unit Head nozzle, supply unit, external observation device, motor misalignment correction area Electronic components

Claims (1)

[Claims] A rotary head in which a plurality of transfer heads are arranged in parallel along the circumferential direction, an electronic component supply section and an electronic component mount section disposed in a transfer path of the transfer head, and the supply section and the mount section. A rotary head type electronic component mounting apparatus comprising: an external appearance observation device disposed between the plurality of transfer heads to observe a positional shift in the xyθ directions of the electronic component adsorbed to the nozzle of the transfer head; To,
A rotary head characterized in that each of the nozzles is provided with a motor that rotates the nozzle around its axis, and the space between the external appearance observation device and the mount section is a positional deviation correction area in the θ direction driven by the motor. type electronic component mounting equipment.