JPH0116619B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a lead frame receiving device.

(Prior Art and Problems) A lead frame having a synthetic resin molded part with an electronic element built in between the legs of an IC chip is stored in a cassette after burrs or flashes are removed by a blasting device. As a receiving device for this lead frame, the present patent applicant first developed
In JP-A No. 59-115532, we proposed a method for receiving processed lead frames from a conveyor and stacking them in a cassette on an index from below.
Although this means is excellent as a mechanism, there is a problem in that it is difficult to make adjustments due to dimensional changes in the lead frame.

In addition, the lead frames stacked on the pallet above the index are grabbed by an air-operated chuck.
A method has been proposed in which lead frames are transferred by moving an arm to which a chuck is attached back and forth and up and down. In this method, since the chuck is moved up and down and back and forth using an air cylinder, the time required for the chuck to move is long, making it difficult to shorten the working time.

Therefore, an object of the present invention is to provide a device that can reliably store a lead frame in a cassette in one motion.

[Structure of the invention]

(Means for Solving the Problems) A lead frame receiving device according to the present invention includes a pair of beams 1 and 1' installed at an interval.
The spacing between both beams 1, 1' can be adjusted, and guide protrusions 5, 5 for guiding the lead frame B' are provided at the lower end facing each other, and guide protrusions 5, 5 on the forward side are provided. Cut out the lower part including the cutout part 17,1
A pair of frame holding plates 4, 4' provided with 7 and guide protrusions 27, 27 that receive and support the lead frame B' from the guide protrusions 5, 5 are arranged on an extension line of the guide protrusions 5, 5. The cutout portion 17,1 provided in
Frame guide rods 18, 18, which are rotatably attached to the frame holding plates 4, 4' at positions 7 and 18, sandwich the top and bottom of the lead frame B' provided at the top and bottom of the introduction side of the frame holding plates 4, 4'. An endless upper round belt 52 and an endless lower round belt 5 that are moved by
5, 55', a push rod 61 that engages with the end face of lead frame B' and moves reciprocally to advance lead frame B', and a push rod 61 that moves up and down and moves up and down located between the pair of frame guide rods 18 and 18. a pressing member 28 that presses down the pressing member 28;
A pair of racks 26, 26 that rise and fall as the
and pinions 23, 24 which mesh with the racks 26, 26 and rotate the frame guide rods 18, 18.
It consists of.

(Embodiment) An embodiment of the present invention will be described in detail with reference to the drawings. A pair of beams 1 and 1' are fixed in opposition to support plates 2 and 2 (see FIG. 3) provided at both ends. Support plates 2, 2 are fixed to the floor surface with legs 3, 3. A pair of frame holding plates 4, 4' are positioned between the beams 1, 1'. The frame holding plates 4, 4' have guide protrusions 5, 5 protruding from the inside of the lower end, respectively, and linear bearings 6, 5 are provided at the blast device A side end and the anti-blast device A side end, respectively.
6, 7, 7 are fitted and fixed, and support shafts 8, 9 supported by beams 1, 1' are connected to the linear bearings 6, 7,
6, 7, 7, frame retaining plates 4, 4'
It is designed so that it can be opened and closed smoothly. Further, in the longitudinal center of the frame holding plates 4, 4', a second
As shown in FIG. 4, the movable members 11, 11 having female screw holes 10 are fitted and fixed. Then, the opposite male screw parts 13, 13 provided on the spacing adjustment rod 12 are screwed into the moving members 11, 11, one end of the spacing adjustment rod 12 is passed through one of the beams 1, and the end of the spacing adjustment rod 12 is passed through one of the beams 1. It is connected to a fixed drive motor 15 via several support rods 14, 14, . The other end of the spacing adjustment rod 12 is connected to an encoder 16 fixed to the outside of the other beam 1. By rotating the spacing adjustment rod 12, the frame holding plates 4, 4' are adjusted to a spacing corresponding to the width of the lead frame B' having the molded portion B.

Also, the interval adjustment rod 12 of the frame holding plates 4, 4'
A notch 17 (see Fig. 5) is formed by cutting out the lower end of the anti-blast device A from the side where the anti-blast device A is positioned, and a cutout 17 (see Fig. 5) is formed in the cutout portions 17, 17, respectively. Guide rod 18,1
8 is installed. That is, a support plate 19 is fixed to the outside of each of the notches 17 on the side of the blasting device A, a part of this support plate 17 is bent inward into an L shape, a support plate 20 is provided, and one end of the support rod 18 is provided. is pivoted,
On the anti-blast device A side, both frame holding plates 4, 4'
A support block 21 is fixed to the outside of each of the support blocks 21, and a substantially L-shaped support member 22 is fixed to the lower surface of the support block 21, and the other end of the frame guide rod 18 is inserted through and supported by the support member 22. This support member 2
A pinion 23 is attached to the end of the support rod 18 through which the pinion 2 is inserted.
is attached to the shaft. Further, a pinion 24 that meshes with this pinion 23 is supported by a shaft 25 on the support member 22. Then, the rack 26 that meshes with the pinion 24
is inserted vertically into the support block 21, and as the rack 26 rises and falls, the support rod 18 is rotated via pinions 23 and 24. These support rods 18, 18 have frame retaining plates 4, 4' inside, respectively.
A guide protrusion 27 located on the same horizontal plane as the guide protrusion 5 is protruded to receive the lead frame B' from the guide protrusion 5, and the lead frame B' is supported on the upper surface of the guide protrusion 27. The side surface of the mold part B is guided between both guide protrusions 27, and the rotation of the support rod 18 causes the lead frame B' to fall downward.

Further, an inverted Z-shaped pressing member 28 (see FIG. 5) is positioned between the supporting rods 18, 18 on both sides. A mounting hole 30 is provided in the center of the horizontal pressing part 29 located below the pressing member 28, into which the large diameter head 32 of the cylinder rod 31 is fitted. A cylinder 34 installed on a horizontal support plate 33 fixed on the top surface
It is installed on. Further, guide rods 35, 35 are vertically fixed to both sides of the cylinder rod 31 of the pressing part 29, and both guide rods 35, 35 penetrate the horizontal support plate 33 to guide the pressing part 29 horizontally. do. In addition, a locking nut 3 is attached to a part of the cylinder rod 31.
6 is provided to stop a spring 37 wound around the cylinder rod 31, so that the spring 37 always presses the pressing portion 29 downward. In addition, the horizontal holding part 38 located above the pressing member 28 has two
The book shafts 39, 39 are inserted and fixed at intervals in the horizontal direction. Both shafts 39, 39 are movably inserted through guide members 40, 40 located on both sides, respectively. The guide members 40, 40 are provided with a stepped portion 41 excluding the teeth of the racks 26, 26,
The small-diameter tips 42, 42 are inserted into the upper part, and spring stops 44, 44 for stopping the springs 43, 43 are provided above the small-diameter tips 42, 42, so that the springs 43, 43 can easily grip the lower surfaces of the guide members 40, 40. , 26 to press against the guide member 40,
The racks 26, 26 are raised and lowered as the rack 40 is raised and lowered.

Also, on the blasting device A side of beams 1 and 1',
A pulley support plate 46 is horizontally fixed to the inside of one beam 1' (on the opposite side in FIG. 2) via a mounting block 45. And the pulley support plate 46
An upper pulley 47 is installed at the top of the blasting device A side end.
(See FIG. 3), and a lower pulley 48 is rotatably supported at a lower portion of the pulley support plate 46 on the anti-blasting device A side than the upper pulley 47. Further, a drive motor 49 is fixed to the outside of the blasting device A side of the other beam 1, and its shaft 5
0 is located inside, the upper pulley 51 is rotatably mounted, and one round belt 52 is tied around both upper pulleys 51 and 47 to hold down the upper surface of the molded part B of the lead frame B' and move it. I'm starting to let them do it. In addition, a lower pulley 53 is located at a location slightly closer to the blasting device A than the interval adjustment rod 12, and is configured to be driven by a drive motor 54 installed on the beam 1' side, so that both lower pulleys 48, 5
Two round belts 55, 55' are tied around 3 to support the lower surface of the molded part B of the lead frame B',
The upper round belt 52 and the lead frame
It is designed to move while holding B′ from above and below. Note that the drive motor 54 is mounted on a bracket 57 supported by legs 56.

Also, a spacing adjustment rod 12 is installed from the introduction side end slightly above the guide protrusion 5 between both frame holding plates 4, 4'.
A lifting prevention plate 58 of the lead frame B is positioned slightly over the anti-blast device A, and is fixedly supported on the beam 1 by fixing rods 59, 59' through one frame holding plate 4'.

Further, a push rod drive device 60 is installed on the outside of one beam 1' in parallel with the beam 1'. The push rod drive device 60 is constructed as follows. That is, the lead frame is engaged with the end surface of the molded portion B of the lead frame B'.
A push rod 61, which moves at the same speed as B', is a rectangular cube and is located vertically, and its upper end is connected to a rod moving rod 62. This rod moving rod 62 is
From the blasting device A side end (solid line position in Figure 2) to the vicinity of the horizontal holding plate 33 (Figure 2 chain line position),
It is designed to be able to move horizontally within a guide groove 63 (see FIG. 4) provided horizontally on one frame holding plate 4'. The central part of the rod moving rod 62 on the side opposite to the push rod is connected to the bracket 6 provided on the moving table 64.
5 by a pin 66, and the end thereof is attached to a cylinder 67 installed on a moving table 64 to raise and lower the lower end of the push rod 61. The moving table 64 has legs 68, 68' at both ends.
Insert the two guide rods 70, 70' inserted into the support plates 69, 69' fixed above, and
The push rod 61 is screwed into a screw rod 71 supported at the center of the screw rod 9, 69', and is rotated in forward and reverse directions by a drive motor 72 that drives the screw rod 71, thereby reciprocating the push rod 61 via a moving table 64. There is.

Furthermore, a cassette 73 is installed below the pressing member 28, as shown in FIG. A base 74 is installed in front of the cassette 73, and two guide rods 75, 75' are installed on the top surface of the base 74.
Two receiving plates 78 are attached to a lifting platform 77 which protrudes upward and rotatably supports a screw rod 76 in the center, which is screwed onto the screw rod 76 and through which both guide rods 75 and 75' are inserted. , 78' project horizontally, and both receiving plates 78, 78' are positioned within the cassette 73. A pulley 79 is mounted on the lower end of the threaded rod 76, a belt 82 is hung between it and a pulley 81 driven by a motor 80, and the threaded rod 76 is rotated by the drive of the motor 80 to raise and lower the lifting platform 77. It's becoming like that.

(Function) This embodiment is constructed as described above, and the interval adjustment rod 12 is rotated by driving the drive motor 15 to adjust the interval between the frame holding plates 4 and 4' via the moving members 11 and 11. The distance between the guide protrusions 5, 5 is set to a size that loosely matches the width of the molded portion B of the lead frame B' and allows the lead frame B' to freely pass through.

Lead frame processed by blasting device A
B' is the lower round belt 55 from the blasting device A,
It is sent between the round belts 52 on the upper side of the belts 55'. Then, the round belts 52 and 52 are driven by the drive motors 49 and 54, respectively.
55, 55' are moved at the same speed, and the lead frame B held between the round belt 52 and the round belts 55, 55' is placed on the upper surface of both guiding protrusions 5, 5.
B' is placed on top of the mold part B, and the mold part B is positioned between the side faces and moved forward without shifting the position of the side faces. From the position away from the upper pulley 51, the lower round belt 55,
The lead frame B' moves forward only with the support of the lead frame B', but at this time, the lifting prevention plate 58 prevents the lead frame B from lifting up from the round belts 55, 55'.

In the above state, lead frame B' moves forward, but
At this time, the push rod 61 is in a standby state in which it is raised by the cylinder 67 via the rod moving rod 62 at the position shown by the solid line in FIG. After the lead frame B' passes through the push rod 61, it is lowered by the cylinder 67 via the rod moving rod 62. At the same time, the screw rod 71 is rotated by the drive motor 72, and the moving table 64
Connect the rod moving rod 62 through the lead frame.
By moving the lead frame B' at the same speed as the moving speed of lead frame B', the push rod 61 pushes the end face of the molded part B, and the lead frame B' is reliably advanced.

The lead frame B' includes guide protrusions 27 of the frame support rods 18, 18 provided below the frame holding plates 4, 4' at a position away from the lower pulley 54;
Both ends of the lead frame B' are mounted on the upper surface of the lead frame 27, and the molded portion B is located between the guide protrusions 27, 27. As the push rod 61 moves, the lead frame B' moves forward, and the entire lead frame B' is supported by the guide protrusions 27, 27. After that, Pussyrod 61
moves in the opposite direction and waits for the next lead frame B' to be sent.

Next, by driving the cylinder 34 and lowering the pressing member 28, the lead frame B' is pressed by the pressing portion 29. At the same time, the horizontal holding part 38 of the pressing member 28 also descends, and both guide members 40, 40
The racks 26, 26 are lowered through the racks 26, 26. As the racks 26, 26 descend, the pinions 24 and 23 rotate, respectively, and the frame support rods 18, 1
8 to open the guide protrusions 27, 27 downward as shown by chain lines in FIG. 7, and drop the lead frame B'. Thereafter, the cylinder 34 is driven in the opposite direction to raise the pressing member 28. Along with this rise, the racks 26, 26 are raised by the springs 43, 43, and the pinions 23, 24 are rotated in opposite directions, so that the frame guide rods 18, 1
8 with the guide protrusions 27, 27 in a horizontal state and wait for the next lead frame B' to arrive.

On the other hand, as shown in FIG. 1, the fallen lead frame B'
8, 78', and driven by the motor 80,
The elevating table 77 is sequentially lowered by the thickness of one lead frame B', and the lead frame B' is stored in the cassette 73.

〔Effect of the invention〕

The present invention has the above-described structure and operation, and can reliably receive the processed lead frame B' without damaging or deforming it.

Further, since the lead frame B' can be stored in the cassette in one motion, the work can be done in a short time.

Furthermore, the interval between the frame holding plates that guide the lead frame can be adjusted depending on the width of the lead frame.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing the arrangement of an embodiment of a lead frame receiving device according to the present invention, Fig. 2 is a plan view, Fig. 3 is a front view, and Fig. 4 is a frame holding device. 5 is a partially cutaway front view showing the relationship between the frame holding rod and the pressing member; FIG. 6 is a sectional view illustrating the open/closed state of the frame supporting rod; FIG. Each figure shows a side view of only the frame support rods. 1, 1'... Beam, 4, 4'... Frame holding plate, 5, 5... Guiding protrusion, 17... Notch, 1
8... Frame support rod, 23, 24... Pinion, 26... Rack, 27... Guide protrusion, 28
...Press member, 52, 55, 55'...Round belt,
61... Push rod, B'... Lead frame.

Claims (1)

[Claims] 1 A pair of beams 1, 1' spaced apart
The spacing between both beams 1, 1' can be adjusted, and guide protrusions 5, 5 for guiding the lead frame B' are provided at the lower end facing each other, and guide protrusions 5, 5 on the forward side are provided. Cut out the lower part including the cutout part 17,1
A pair of frame holding plates 4, 4' provided with 7 and guide protrusions 27, 27 that receive and support the lead frame B' from the guide protrusions 5, 5 are arranged on an extension line of the guide protrusions 5, 5. The cutout portion 17,1 provided in
Frame guide rods 18, 18, which are rotatably attached to the frame holding plates 4, 4' at positions 7 and 18, sandwich the top and bottom of the lead frame B' provided at the top and bottom of the introduction side of the frame holding plates 4, 4'. An endless upper round belt 52 and an endless lower round belt 5 that are moved by
5, 55', a push rod 61 that engages with the end face of lead frame B' and moves reciprocally to advance lead frame B', and a push rod 61 that moves up and down and moves up and down located between the pair of frame guide rods 18 and 18. a pressing member 28 that presses down the pressing member 28;
A pair of racks 26, 26 that rise and fall as the
and pinions 23, 24 which engage the racks 26, 26 and rotate the frame guide rods 18, 18.
A lead frame receiving device consisting of.