JPH0750716B2 - Pellet mounting device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pellet mounting device for mounting pellets such as IC and LSI at a pellet mounting position of a lead frame.

[Prior Art] As a conventional pellet mounting device, for example, a single actuating member and the above-mentioned actuating member are disposed, and reciprocate between a pellet feeding position and a pellet adjusting position to sequentially move to the pellet feeding position. A first transfer unit that holds the supplied pellets and can transfer the pellets to a pellet adjusting position, and the moving member is disposed on the operating body and reciprocates between the pellet adjusting position and the lead frame.
A second transfer unit is provided, which holds the pellets adjusted in a predetermined angle state at the pellet adjustment position, transfers the pellets to a pellet mounting position of a lead frame conveyed by a conveyor, and makes them mountable. There is something. That is,
In this device, each pellet mounting position of the lead frame is
The lead frame is pitch-moved so as to be sequentially positioned by the second transfer unit that holds the pellets. As a result, it becomes possible to sequentially mount the pellets in the adjusted state at the respective pellet mounting positions of the lead frame that is pitch-moved.

Further, there is a dual lead frame in which two pellet mounting positions are arranged side by side in one area of the lead frame which has been recently pitch-shifted. In a lead frame of this type, pellets are mounted at respective pellet mounting positions arranged in parallel by a pellet mounting device described in Japanese Patent Publication No. 59-35177. That is, in this device, the lead frame is pitch-moved by the carrier, and one of the two pellet mounting positions arranged in parallel in the lead frame is correspondingly positioned with respect to the second transfer portion. When the pellets are mounted at one of the pellet mounting positions positioned by the second transfer unit, the pellets are mounted at the other pellet mounting position that is arranged next next. The mounting is performed by moving the carrier that holds the lead frame so that the other pellet mounting position arranged in parallel with the second transfer portion is positioned correspondingly.
As a result, it is possible to sequentially load the pellets in the adjusted state at each of the two pellet mounting positions arranged in parallel.

[Problems to be Solved by the Invention] However, in each of the above-mentioned conventional pellet mounting apparatuses, the entire lead frame having a long length is pitch-moved by the carrier, whereby each pellet is moved to the second transfer unit. The mounting position was positioned correspondingly. Therefore, a highly accurate feed amount is required for the carrier for the positioning, and a complicated feed control mechanism is required for the device.

Further, in a pellet mounting apparatus for mounting pellets on a dual lead frame, a relatively large weight is required so that each of the two pellet mounting positions arranged in parallel in one area and the second transfer unit are positioned correspondingly. The entire carrier must be moved, and there are limits to the moving speed and positioning accuracy of the carrier. Therefore, it is considered to hinder the improvement of productivity and quality.

On the other hand, a pellet loading device is conceivable in which the second transfer portion can be positioned corresponding to each of the two pellet loading positions by driving the actuating body in the XY directions by driving the XY table. According to this method, since the actuating body, which is lighter than the conveying body, is driven with respect to the lead frame, it is possible to position the second transfer portion with high accuracy corresponding to each pellet mounting position.

However, according to this method, when the second transfer section is moved toward one pellet mounting position, the first transfer section is also moved with respect to the pellet adjusting position together with this. Therefore, during this period, the first transfer unit cannot supply the pellets to the pellet adjusting position, which impedes the efficient operation of the apparatus and the improvement in productivity.

The present invention has a simple configuration to securely mount pellets at respective pellet mounting positions on a lead frame, and to improve productivity and quality of electronic components formed by mounting the pellets on the lead frame. To aim.

[Means for Solving the Problems] The present invention is a pellet mounting apparatus capable of mounting pellets at a plurality of pellet mounting positions arranged on a lead frame to be conveyed, and has a single constant track and a constant stroke. A single actuating member that reciprocates only, and is disposed on the actuating member. The reciprocating motion of the actuating member causes the actuator to reciprocate between the pellet feeding position and the pellet adjusting position, and sequentially to the pellet feeding position. A first transfer portion that holds the supplied pellets and can transfer the pellets to a pellet adjustment position, and a first transfer section that is disposed on the operating member and moves between the pellet adjustment position and the lead frame by the reciprocating motion of the operating member. And a second transfer unit that holds the pellets adjusted to a predetermined angle state at the pellet adjustment position and can transfer the pellets onto the lead frame, and a second transfer unit that is provided in the operating body. To keep A drive that moves the second transfer portion with respect to the operating body prior to pellet mounting and adjusts the movement amount so that the held pellets correspond to a plurality of pellet mounting positions arranged on the lead frame. And a mounting position adjusting unit having a power source.

[Operation] Despite the use of an inexpensive actuator that reciprocates with a single constant orbit and only a constant stroke without using an expensive XY table, on the other hand, between the pellet feeding position and the pellet adjusting position, Pellet transfer, on the other hand, can be carried out simultaneously between a pellet alignment position and a plurality of pellet loading positions on the leadframe.

EXAMPLES Examples of the present invention will be described below with reference to the drawings.

1 is a plan view showing a pellet mounting device according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG.

The pellet mounting device 10 picks up the aligned pellets 12 one by one on the XY table 11. Further, the pellets 12 to be extracted can be mounted at the pellet mounting position 15 of the lead frame 14 sequentially transported by the transport body 13.

The carrier 13 that can carry the lead frame 14 is arranged in the X direction, and the lead frame 14 can be carried at a pitch in the A direction indicated by the arrow. The lead frame 14 conveyed is a dual lead frame in which two pellet mounting positions 15 are arranged side by side in the width direction (Y direction), and the interval between the pellet mounting positions 15 continuous in the X direction is a predetermined pitch. P. As a result, the carrier 13 is arranged such that the pellet mounting positions 15 in the X direction are sequentially set at predetermined frame stop positions.
The lead frame 14 can be intermittently conveyed at the pitch P so that the lead frame 14 is retained at 16.

A single actuating body 17 that is swingable in the direction of the arrow B is disposed above the carrying body 13, and the actuating body 17 includes a first arm.
18 and a second arm 19 are arranged. First of all the arms 18 and 19, a first adsorption nozzle 20 as a first transfer portion is provided at the tip of the first arm 18, and a second transfer nozzle is provided at the tip of the second arm 19. A second suction nozzle 21 as a part is provided.

The first suction nozzle 20 is fixedly arranged at the tip of the first arm 18. On the other hand, the second suction nozzle 21 is slidably supported on the second arm 19 in the arrow C direction. That is, the second suction nozzle 21 is supported by the slide body 22, and the slide body 22 is slidable in the arrow C direction with respect to the actuating body 17. The slide body 22 is the second arm.
19 is supported and fixed to a main body portion 24 of a cylinder device 23 disposed on the tip end side of the cylinder device 19, while a piston rod 25 of the cylinder device 23 is provided.
Is a support frame 26 fixed to the tip of the second arm 19.
It is connected to. The support frame 26 has a U-shaped cross section as shown in FIG. 2, and the piston rod 25 is connected to one side 27A of the support portions 27A, 27B forming a pair of the support frame 26. Further, two guide shafts 28 are arranged between the support portions 27A and 27B, and the slide body 22 is slidable in the direction of arrow C while being guided by the guide shafts 28.
Of the supporting portions 27A and 27B, the main adjusting screw 29A is screwed into the supporting portion 27A. On the other hand, the auxiliary adjustment screw 29B is screwed into the support portion 27B.

The main adjusting screw 29A is capable of colliding with the slide body 22 which is slid in the direction of the arrow C, and the movable end on one side of the slide body 22 can be set in the colliding state. Also, the main adjustment screw
The screw 29A can adjust the moving end position on one side of the slide body 22 by adjusting the screw of the screw 29A. Second suction nozzle
21 is positioned and stopped at the main stop position 30A when the slide body 22 abuts the main adjusting screw 29A.

On the other hand, the sub-adjustment screw 29B is capable of abutting against the slide body 22 slid in the direction of the arrow C, and the other end of the slide body 22 can be set in the abutting state. In addition, the sub-adjustment screw 29B can be adjusted by adjusting the screw movement of the screw 29B.
22 The moving end position on the other side can be adjusted. The second suction nozzle 21 is stopped and positioned at the sub-stop position 30B when the slide body 22 abuts the sub-adjustment screw 29B.

The second suction nozzle 21 and the first suction nozzle 20 positioned at the main stop position 30A are separated by θ1 degree (45 degrees) about the fulcrum 0 of the actuating body 17, and each nozzle 20, 21 has a fulcrum 0.
It is in a state of being arranged on the same circumference centered on.

The actuating body 17 is reciprocally rocked in the range of an angle of 45 degrees in the direction of arrow B (reciprocating motion with only a single constant track and constant stroke).
First, the lower part of the swing end of the first suction nozzle 20 in the direction of the arrow D is the pellet supply position 31 of the XY table 11. On the other hand, the second suction nozzle 21 positioned at the main stop position 30A
Below the swinging end in the direction of arrow E, the frame stop position 16 of the carrier 13 is set. That is, the angle between the pellet supply position 31 and the frame stop position 16 is about the fulcrum 0.
The intermediate angle position between the pellet supply position 31 and the frame stopping position 16 is set to the pellet adjusting position 33 of the pellet adjusting device 32, which are separated by 90 degrees.

As a result, the swinging of the actuating body 17 causes the first adsorption nozzle 20 serving as the first transfer portion on the one hand to be located between the pellet supply position 31 and the pellet adjusting position 33, and on the other hand to act as the second transfer portion. It is possible to simultaneously move the two suction nozzles 21 back and forth between the pellet adjusting position 33 and the frame stopping position 16.

Of the suction nozzles 20 and 21 arranged in the actuation body 17, the first suction nozzle 20 adsorbs the pellet 12 supplied to the pellet supply position 31 at the swinging end of the actuation body 17 in the direction of the arrow D. And hold. When the pellet 12 at the pellet supply position 31 is picked up in the suction state, the XY table 11 is driven in the XY direction, and the pellet 12 next picked at the pellet supply position 31.
Will be positioned. The pellets 12 adsorbed and held by the first adsorption nozzle 20 are transferred through the swing of the actuation body 17 in the arrow E direction, and the swing end in the arrow E direction, that is, the pellet adjusting position. Adsorbed and released at 33.

The pellets 12 released to the pellet adjusting position 33 are adjusted by driving a plurality of pellet adjusting claws 34 of the pellet adjusting device 32. The pellet adjusting claws 34 are respectively driven in the arrow F direction so that the pellets 12 at the pellet adjusting position 33 can be adjusted to a predetermined adjusting angle state. The first suction nozzle 20 that has released the pellets 12 to the pellet adjustment position 33 is positioned at the pellet supply position 31 by swinging the operating body 17 again, and sucks and holds the newly supplied pellets 12. ing. In this way, the first adsorption nozzle 20 can sequentially transfer the pellets 12 supplied to the pellet supply position 31 to the pellet adjustment position 33.

On the other hand, the second suction nozzle 2 positioned at the main stop position 30A
The reference numeral 1 indicates that at the swinging end of the actuating body 17 in the direction of the arrow D, the pellets 12 that have been adjusted and aligned at the pellet adjustment positions 33 are adsorbed and held. The pellets 12 adsorbed and held by the second adsorption nozzle 21 are transferred through the swinging motion of the actuating body 17 in the E direction indicated by the arrow, and the swing end in the E direction indicated by the arrow, that is, the frame stop position. Positioned above 16.

At this time, as shown in FIGS. 1 and 2, the main stop position 30
The second suction nozzle 21 positioned at A can be positioned corresponding to one side of the two pellet mounting positions 15 arranged in parallel in the Y direction shown by the arrow in the vertical direction. In this state, the second suction nozzle 21 is driven downward by the vertical drive means (not shown). Next, the pellets 12 held by the second suction nozzle 21 are mounted at the pellet mounting position 15 to which the adhesive is applied in advance,
The pellet 12 held by the second suction nozzle 21 is sucked and released at the position 15. In this way, when the pellets 12 are mounted at the pellet mounting position 15 on one side, the second suction nozzle 21 positioned at the main stop position 30A is again raised by the vertical driving means, and then the pellet adjustment position 33. Rocked to. The second suction nozzle 21, which is swung to the pellet adjusting position 33, adjusts to the position 33 and can hold the positioned pellet 12 by suction. The second suction nozzle 21 that suction-holds the pellets 12 is swung again in the E direction indicated by the arrow by driving the operating body 17. The second suction nozzle 21 was positioned at the main stop position 30A while the second suction nozzle 21 was swung in the E direction.
The suction nozzle 21 is stopped and positioned at the sub-stop position 30B by driving the cylinder device 23. The pellet 12 held by the second suction nozzle 21 is positioned again above the frame stationary position 16 at the swinging end in the arrow E direction.

At this time, the second suction nozzle 21 positioned at the sub-stop position 30B is positioned vertically corresponding to the other side of the two pellet mounting positions 15 arranged in the Y direction shown by the arrow. Therefore, the second suction nozzle 21 at the frame stop position 16 is preliminarily positioned so as to correspond to the pellet mounting position 15 on one side at the main stop position 30A and the pellet mounting position 15 on the other side at the sub stop position 30B. Adjustment screw 29
A and 29B are adjusted by screwing. The second suction nozzle 21 positioned at the pellet mounting position 15 on the other side is moved down by a vertical drive means (not shown), so that the pellets 12 held by the suction nozzle 21 are mounted at the pellet mounting position 15. Becomes

In this way, the two pellet mounting positions 15 arranged side by side
When the pellets 12 are sequentially mounted on the second suction nozzle 21, the second suction nozzle 21 at the frame stop position 16 is swung again in the direction D. During this time, the second suction nozzle 2 stopped at the sub-stop position 30B
1 is positioned at the main stop position 30A by driving the cylinder device 23. As a result, the second suction nozzle 21 is moved to the arrow D
Is positioned at the pellet adjustment position 33 at the swing end in the direction,
At the position 33, the pellet 12 to be mounted next is sucked and held.

On the other hand, the carrier 13 pitch-carries the lead frame 14 in the direction of the arrow A, and the two pellet mounting positions 15 for the next mounting work are positioned at the frame stop position 16. Positioned two pellet mounting positions 15
The pellets 12 that have been adjusted in order are mounted on the shaft 12 by swinging the actuating body 17 and driving the cylinder device 23.

Next, the operation of the above embodiment will be described.

According to the pellet mounting apparatus 10 according to the first embodiment described above, although an inexpensive XY table is used and the actuator 17 that reciprocates only at a constant single orbit and constant sloak is used, on the other hand, Pellets can be transferred between the pellet supply position 31 and the pellet adjusting position 32, and simultaneously, between the pellet adjusting position 32 and a plurality of pellet mounting positions 15 on the lead frame. Then, by the drive adjustment of the cylinder device 23 as the mounting position adjusting unit, the relatively lightweight second suction nozzle 21 that holds the pellets 12 is moved between the main stop position 30A and the sub stop position 30B, and the frame stop position is obtained. It is possible to position corresponding to each of the two pellet mounting positions 15 retained at 16. As a result, by setting the transfer speed of the second suction nozzle 21 as the second transfer unit to be high, the productivity of electronic components manufactured by mounting the pellets 12 on the lead frame 14 is improved. . Furthermore, by moving only the second suction nozzle 21 corresponding to each pellet mounting position 15 quickly and with high accuracy, the pellet 12 can be mounted accurately, and the quality of the manufactured electronic component is improved. Become. Thus, with a simple configuration, the pellets 12 are surely attached to the pellet device positions 15 of the lead frame 14 and the pellets 12 are attached to the lead frame 14.
It is possible to improve the productivity and the quality of electronic components formed by mounting.

FIG. 3 is a plan view showing a pellet mounting device according to a second embodiment of the present invention, and FIG. 4 is a sectional view taken along the line IV-IV in FIG.

This pellet mounting apparatus 40 relates to the modification of the first embodiment, and conveys lead frames 14 in the direction of arrow G with a pitch by a carrier 13 arranged in the X direction, and also conveys the lead frames 14. The pellets 12 can be sequentially mounted at the pellet mounting positions 15. This pellet loading device 40
The second suction nozzle 21 is supported by the slide body 41, and the slide body 41 is slidable in the direction (H direction) along the longitudinal direction of the second arm 19. This is different from the slide body 22 in the first embodiment, which is slid in the direction (F direction) intersecting the longitudinal direction of the second arm 19. The slide body 41 is slidable along a rail 42 arranged in the arrow H direction of the second arm 19, and the slide of the slide body 41 is a drive adjustment of a control motor 43 fixed to the second arm 19. Performed by. That is, the driving gear 44 is attached to the drive shaft 44 of the control motor 43,
A driven gear 46 is meshed with the driving gear 45. The driven gear 46 is attached to a screw shaft 47, and the screw shaft 47 is supported by a support body 48. Further, the screw portion 49 of the screw shaft 47 is screwed into the screw hole 50 of the slide body 41. As a result, the slide body 41
Can be slid in the direction of arrow H through the rotation of the screw shaft 47 driven by the control motor 43. The slide of the slide body 41 is controlled by the control motor 43 so that the second suction nozzle 21 positioned above the frame stop position 16 is vertically positioned at the corresponding pellet mounting position 15.
Is performed by adjusting the drive amount of. The drive amount adjustment means 51 adjusts the drive amount of the control motor 43. The drive amount adjusting means 51 is a disc attached to the drive shaft 44 of the control motor 43.
The rotation amount of 52 can be sequentially detected by the encoder 53, and the control motor 43 is rotated by a predetermined amount. As a result, the main stop position 30A and the sub stop position 30B of the second suction nozzle 21 are previously adjusted by the adjusting means so that any one of the pellet mounting positions 15 arranged in parallel with the second suction nozzle 21 is positioned. It is set according to 51.
In this way, the second stop positions 30A and 30B are stopped.
The suction nozzle 21 makes it possible to mount the pellet 12 at the corresponding pellet mounting position 15. According to the pellet mounting apparatus 40 according to the present embodiment, the driving amount adjusting means 51 stores the predetermined stop positioning position of the second suction nozzle 21 in advance, so that the pellets 12 can be sequentially arranged in parallel at the pellet mounting position 15.
Can be attached. Further, when the lead frame 14 conveyed by the pitch has three or more pellet mounting positions in the Y direction shown by the arrow, the drive amount adjusting means 51 sequentially positions the second suction nozzles 21 at the respective mounting positions.
It becomes possible to mount the pellets 12 on each. Other configurations and operations are similar to those of the first embodiment.

In the second embodiment, by controlling the drive of the control motor 43 so as to alternately rotate in the forward and reverse rotation directions, it is possible to apply a scrub to the pellet 12 when the pellet 12 is mounted. .

FIG. 5 is a plan view showing a pellet mounting device according to the third embodiment of the present invention.

The pellet mounting device 60 includes a carrier 61 arranged in the Y direction shown by the arrow, and the carrier 61 is a lead frame 62 arranged in the J direction shown by the arrow.
Can be transported. The lead frame 62 carried by the carrier 61 is a dual lead frame in which two pellet mounting positions 63A and 63B are continuous along the carrying direction (J direction). The structure of this pellet mounting device 60 is
The construction is substantially the same as that of the pellet mounting device 40 according to the second embodiment, and the slide body 41 is slidable in the H direction shown by the arrow. The carrier 61 is pitch-conveyed so that one of two continuous pellet mounting positions 63A and 63B of the lead frame 62 is sequentially positioned at the frame stop position 16. The second suction nozzle 21 is first positioned at the frame stop position 16 while being positioned at the main stop position 30A.
It swings to one pellet mounting position 63A, and the pellet 12 is mounted to this position. Subsequently, the pellet 12 is mounted on another continuous pellet mounting position 63B by sliding the second suction nozzle 21 swung to the frame stop position 16 to the sub-stop position 30B by the drive amount adjusting means 51. ing. Other configurations and operations are similar to those of the second embodiment.

In each of the above embodiments, the pellets 12 are mounted on the dual lead frame having two pellet mounting positions in the transportation direction or the direction intersecting the transportation direction. However, the above pellet mounting devices
10, 40 and 60 can also be used for an ordinary lead frame in which a plurality of pellet mounting positions are continuous in one direction. In this case, the lead frame to be conveyed may be fixed and the second suction nozzle 21 may be moved correspondingly to each continuous pellet mounting position.

[Effects of the Invention] As described above, according to the present invention, an electronic device formed by securely mounting a pellet at each pellet mounting position on a lead frame and mounting the pellet on the lead frame with a simple configuration. There is an effect that productivity and quality of parts can be improved.

[Brief description of drawings]

1 is a plan view showing a pellet mounting device according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1,
FIG. 3 is a plan view showing a pellet mounting device according to a second embodiment of the present invention, FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is a third embodiment of the present invention. It is a top view which shows the pellet mounting apparatus which concerns on. 10, 40, 60 …… Pellet loading device, 12 …… Pellet, 14
...... Lead frame, 15, 63A, 63B …… Pellet mounting position, 17 …… Actuator, 20 …… First suction nozzle (first transfer section), 21 …… Second suction nozzle (second transfer section), 31 …… Pellet supply position, 32 …… Pellet adjusting device, 33 …… Pellet adjusting position, 23 …… Cylinder device (mounting position adjusting part), 43 …… Control motor (mounting position adjusting part).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-126842 (JP, A) JP-A-56-180040 (JP-A-58-85340) A microfilm (JP, U) of which the contents of the specification and the drawings attached to the application for the Japanese Patent Application No. 57-117543 (the number of which is 59-24281 of the actual application) was photographed. A microfilm (JP, U) of the contents and drawings attached to the application for Japanese Patent Application No. 58-157988 (No. 60-67824, Shokai).

Claims (1)

[Claims] 1. A pellet mounting device capable of mounting pellets at a plurality of pellet mounting positions arranged on a lead frame to be conveyed, wherein the pellet mounting device reciprocates with a single constant track and a constant stroke. Of the operating body and the operating body, and reciprocates the operating body to reciprocate between the pellet feeding position and the pellet adjusting position to hold the pellets sequentially fed to the pellet feeding position. A first transfer portion that can be transferred to a pellet adjusting position and the operating member, and the reciprocating motion of the operating member reciprocates between the pellet adjusting position and the lead frame to adjust the pellet adjusting position. Hold the pellets that have been adjusted to a predetermined angle at the position,
A second transfer unit that can transfer the pellets onto the lead frame, and a pellet that is provided on the actuation body and that is held by the second transfer unit corresponds to a plurality of pellet mounting positions arranged on the lead frame. And a mounting position adjusting section having a drive source for moving the second transfer section with respect to the actuation body prior to pellet mounting and adjusting the movement amount.