JP2646696B2 - Rotary head electronic component mounting equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rotary head type electronic component mounting apparatus for mounting an electronic component on a substrate while rotating a rotary head having a plurality of transfer heads arranged side by side. is there.

(Prior Art) A device equipped with a rotary head is known as an electronic component mounting device. The rotary head is equipped with a large number of transfer heads along its circumferential direction.In the electronic component supply section, the electronic components are sucked at the lower end of the nozzle of the transfer head, and the rotary head is intermittently rotated. The electronic component is transferred to and mounted on a substrate positioned on the mount unit.

Incidentally, the electronic component sucked by the nozzle as described above has a positional shift in the xyθ direction, and it is necessary to correct the positional shift before mounting the electronic component on the substrate. FIG. 4 is a plan view of a conventional rotary head, and FIG. 5 is a partial side view, wherein 100 is a rotary head, 101 is a transfer head, and 102 is a supply unit for electronic components such as a tape unit and a tray. Reference numeral 103 denotes a positioning portion of a substrate 104 composed of an XY table, 105 denotes an appearance observation device, 106 denotes a θ correction gear, and 107 denotes a gear coaxially mounted with the nozzle 108 of the transfer head 101. explain.

The transfer head 101 that has taken up the electronic component P in the supply unit 102 is conveyed by the intermittent rotation of the rotary head 100 in the N direction.
Electronic component P sucked to the lower end of nozzle 108 by 105
Are detected in the xyθ direction. The transfer head 101 is further transferred to the positioning unit 103, but before the transfer head 101 reaches the substrate 104, the XY table 103 is moved.
Is moved by △ x, △ y, so that the xy
The positional deviation △ x, △ y in the direction is corrected. The correction in the θ direction is
This is performed as follows. That is, when the gear 107 of the transfer head 101 reaches the position facing the correction gear 106 and the intermittent rotation of the rotary head 100 is stopped, the gear 106 is engaged with the gear 107, and the nozzle 108 is moved along its axis. By rotating about the center, the positional deviation Δθ in the θ direction is corrected.

(Problems to be Solved by the Invention) By the way, when the electronic component P of the supply unit 102 is mounted on the board 104, an arbitrary angle is set in the middle (for example, as shown in FIG.
゜) In some cases, it may be necessary to rotate
The nozzle 108 must be rotated 180 ° + Δθ by 106. To rotate the nozzle 108 by 180 ° + △ θ in this manner, a considerable time (for example, 0.3 seconds) is required because the rising characteristic of the motor that drives the gear 106 is slow. Therefore, the stop time of the rotary head 100 that rotates intermittently needs to be at least longer than this time, and the rotational speed of the rotary head 100 must be reduced accordingly, and the mounting speed cannot be increased. Also, when the nozzle 108 is rotated by 180 ° + △ θ in a very short time as described above, the electronic component P sucked to the lower end of the nozzle 108 may be shaken off the nozzle 108 due to the rotational centrifugal force. Or, there is a problem that the position is easily shifted.

Therefore, the present invention provides a means capable of securing a sufficient time for correcting a displacement in the θ direction of an electronic component adsorbed on a nozzle, increasing the rotation speed of a rotary head, and improving mounting efficiency. With the goal.

(Means for Solving the Problems) The present invention provides a rotary head, a plurality of transfer heads intermittently rotating along the circumferential direction of the rotary head, and an electronic component disposed on a movement path of the transfer head. A supply unit and a mount unit for electronic components, and an appearance observation device disposed between the supply unit and the mount unit, for observing a displacement in the xyθ direction of the electronic component adsorbed to the nozzle of the transfer head. A rotary head type electronic component mounting apparatus comprising: a motor for rotating the nozzles of each of the transfer heads while performing the intermittent rotation integrally with the plurality of transfer heads to perform θ correction of the electronic component adsorbed to the nozzles Is provided for each of the plurality of transfer heads,
During the intermittent rotation operation, the nozzles of the plurality of transfer heads can be rotated around a vertical axis in an arbitrary area,
In addition, the area between the external appearance observation device and the mount section is used as the displacement correction area in the θ direction due to the driving of the motor.

(Operation) In the above configuration, the electronic component sucked by the nozzle in the supply unit is sent to the external appearance observation device by the intermittent rotation of the rotary head, and the positional shift is observed. The displacement in the θ direction is performed by driving a motor mounted on the transfer head to rotate the nozzle about a vertical axis. The correction in the θ direction is performed slowly in a wide correction area while the transfer head moves from the appearance observation device to the mount unit.

Example Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of an electronic component mounting apparatus, wherein 1 is a main body box, 2 is a rotary head rotatably mounted on the lower part of the box 1, and 3 is a mount for electronic components composed of XY tables 4 and 5. Department. Reference numeral 6 denotes a substrate positioned on the mount section 3, and the substrate 6 slides in the xy direction by sliding of the XY tables 4 and 5. Rotary head 2
A plurality of transfer heads 7 that intermittently rotate in the direction of arrow N along the circumferential direction are provided side by side on the lower surface of the, and each transfer head 7 has a nozzle 8 that protrudes downward.

FIG. 2 is a plan view of the rotary head 2. Numeral 10 denotes a supply unit of an electronic component P such as a tray or a tape unit provided on the opposite side of the mount unit 3, and the rotary head 2 in the N direction. By the intermittent rotation operation and the elevating operation of the nozzle 8, the electronic component P of the supply unit 10 is sucked to the lower end of the nozzle 8 and transferred to the substrate 6 for mounting. Reference numeral 11 denotes an appearance observation device provided between the supply unit 10 and the mount unit 3 for detecting a displacement in the xyθ direction of the electronic component P sucked to the lower end of the nozzle 8. The number of pitches between the appearance observing device 11 and the substrate 6 is 6, and the interval between the two is the position shift correction area A in the θ direction.
It has become. Next, the detailed structure of the transfer head will be described with reference to FIG.

12 is a motor provided on the upper part of the rotary head 2,
An index 13 rotates the rotary head 2 intermittently around a shaft 14. 7 is the transfer head,
Reference numeral 8 denotes the nozzle, on which a spline 15 as a vertical axis is provided upright. Reference numeral 16 denotes a motor, which rotates the nozzle 8 about the spline 15 via a timing belt 17, pulleys 18, 19, a shaft 20, a timing belt 21, and pulleys 22, 23. Is corrected in the θ direction. As shown in FIG. 2, a large number of transfer heads 7 attached to the rotary head 2 are equipped with motors 16 for rotating the nozzles 8, respectively. Intermittent rotation in the direction. By driving each motor 16, each nozzle 8 can be rotated around the spline 15.

In this case, since the motors 16 are provided for the respective transfer heads 7, the nozzles of the respective transfer heads 7 can be freely rotated in any area of the moving path during the above-mentioned rotation operation.

26 is a rod reciprocating horizontally in the rotary head 2 and 27 is a pin 28 driven by the rod 29
, A roller 29 pivotally mounted on the tip of the arm 27, and a slider 30.
29 is fitted, and the slider 26
30 moves up and down along a vertical shaft 31. 32 is slider 30
, A roller 33 connected to the roller 32, a bracket 35, a shaft suspended from the bracket 34, and a shaft 35, 36
And the transfer head 7 are connected by a bracket 37. When the slider 30 moves up and down as described above, the shaft
35 and 36 move up and down, and the transfer head 7 connected thereto also moves up and down to pick up the electronic component P by the nozzle 8 and mount the electronic component P on the substrate 6.

The present apparatus has the above configuration, and the operation will be described next.

In the supply unit 10, the transfer head 7 that picks up the electronic component P moves to the appearance observation device 11 by intermittent rotation of the rotary head 2 in the N direction, and moves in the xyθ direction of the electronic component P sucked to the lower end of the nozzle 8.位置 x, △ y, △
θ is detected. The displacement △ x, △ y in the xy direction is
The correction is made by moving the tables 4 and 5 by the same amount in the xy direction. The positional deviation Δθ in the θ direction is corrected by driving the motor 16 to rotate the nozzle 8 about the spline 15. Here, as described above, when the electronic component P is rotated by 180 ° in order to change the mounting direction on the substrate 6, the amount of rotation is 180 ° + 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 described above, the number of pitches of the position shift 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 feed time is 0.2 seconds, there is a margin of 1.2 seconds. The motor 16 can be driven slowly and with sufficient time to rotate the nozzle 8.

(Effect of the Invention) As described above, according to the present invention, while performing intermittent rotation integrally with a plurality of transfer heads, the nozzle of each transfer head is rotated to perform θ correction of the electronic component sucked by the nozzle. By providing a motor to each of the plurality of transfer heads, the nozzles of the plurality of transfer heads can be rotated around the vertical axis in any area during the intermittent rotation operation,
In addition, since the area between the appearance observation device and the mount section is a displacement correction area in the θ direction due to the driving of this motor,
A long area during which the transfer head moves from the external appearance observation device to the substrate is used as a position shift correction area in the θ direction, and the nozzle can be slowly rotated with sufficient time to correct the position shift in the θ direction. Even with a low-capacity motor, the θ correction can be performed with a margin, and the electronic components can be mounted on the board at a high speed by increasing the intermittent rotation speed of the rotary head.

[Brief description of the drawings]

1 shows an embodiment of the present invention, FIG. 1 is a perspective view of a rotary head type electronic component, FIG. 2 is a plan view of a rotary head, FIG.
4 and 5 are a plan view and a sectional view of a rotary head of a conventional device. 2 Rotary head 3 Mounting unit 6 Substrate 7 Transfer head 8 Nozzle 10 Supply unit 11 Appearance observation device 15 Spline (vertical axis) 16 Motor A Position Deviation correction area P: Electronic components

Claims (1)

(57) [Claims] 1. A rotary head, a plurality of transfer heads intermittently rotating in a circumferential direction of the rotary head, an electronic component supply unit and a mount of the electronic components disposed on a movement path of the transfer head. Part, and a rotary head type electronic component mounting device provided between the supply unit and the mounting unit, and an appearance observation device for observing a displacement in the xyθ direction of the electronic component sucked by the nozzle of the transfer head. In the apparatus, a motor that rotates the nozzles of each transfer head to perform θ correction of the electronic components adsorbed on the nozzles while performing the intermittent rotation integrally with the plurality of transfer heads is provided to the plurality of transfer heads. By providing each,
During the intermittent rotation operation, the nozzles of the plurality of transfer heads can be rotated around a vertical axis in an arbitrary area,
A rotary head type electronic component mounting apparatus, characterized in that a gap between the external appearance observation device and the mounting portion is a displacement correction area in the θ direction by driving the motor.