JPS5918667A - Cut end bender for lead frame - Google Patents

Abstract

PURPOSE:To perform cut bending with good accuracy by a method wherein claws are provided at cutting regions, and then the positional slippage of lead frames is corrected by operating a correcting claw every time at the reset time of a feed claw. CONSTITUTION:The claws 27a and 27b fixed on a sliding block 32 move to right by the half turn of a cam 39, and a lead frame is placed from a supplier by stepwise differences 29a and 29b, thus carried out over the stepwise difference 26 of carriage bases 21 and 24. During this time, a roller 43 and levers 42a, 42b fixed on the block 32 strike on the plates 52a, 52b, rollers 62a, 62b of a correcting claw moving mechanism 55, thus moves claws 68a and 68b to right and raise them. The claws 27 move to left by the following half turn of the cam 39, and then the frame is replaced to the stepwise difference 26 and rides between guide rails 25. Meantime, the levers 42a and 42b come off from the rollers 62a and 62b, thus the claws 68a and 68b lower, the hook top ends come between the rails 25, draw near the frame 69 to the stepwise difference 26 and then set at the cutting part P1. The frame is fed to the bending part P2 via the rails 25 without hindrance by the next half turn of the cam, and the next frame is set at the cutting part P1 at the time of reset of the block 32. The yield and the operating efficiency are improved by accurate setting.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lead frame conversion device.

[Technical background of the invention]

As is well known, in the production of resin-sealed semiconductor devices,
a cutting step of continuously supplying lead frames having a plurality of resin-sealed semiconductor elements one by one from a stocker and cutting the lead reinforcing material of the lead frames;
A pending process is performed in which the leads after cutting are bent and the hanging sheaves connected to the outer frame are cut to separate the individual semiconductor elements.

By the way, the cut-end bending device used in the above-mentioned process has conventionally been used as shown in Fig. 1 (phantom).

The structure shown in (b) is known. That is, reference numeral 1 in the figure is a conveyance table on which a plurality of mutually parallel guide rails 2 are formed on the surface by groove machining, and this conveyance table I
is fixed on table 3. Said guide rail 2
A step 4 is formed perpendicularly to the longitudinal direction of the conveyor table 1 including the conveyor table 1. The rear end side of the lead frame comes into contact with this step 4 when the feed pawl, which will be described later, is retracted, thereby positioning the lead frame in the mold area of the conveyor table 1 on the right side of the step 4. be. A pair of feed pawls 5*r5b are attached to the conveyor table I so that the guide tray of the conveyor table I) I'2.2M K ? f) is arranged so that it can move forward and backward. Step portions 7a, r, 7b for hooking the lead frames in the stocker 6 set upright on the upper surface of the guide rail 2 of the transport platform I are formed on these feed claws S a l 5b, respectively. There is. These step portions 7m and 7b are located at the third position in the direction of movement from the step 4 of the guide rail 2 of the conveyance platform I when the feed claws 5m and 5b advance to a predetermined position and stop. It is formed to do so. Furthermore, a punching die 8 is disposed in a portion of the conveyance table 1 on the conveyance direction side of the step 4, corresponding to the semiconductor element of the lead frame, and the punching die 8 has a plurality of square holes 9 passing through it vertically.・ is provided. These square holes 9 act as escape holes for a punch (not shown) for cutting the reinforcing material of the lead frame, and
It has the function of discharging the scraps of reinforcement material downward. These square holes 9... have through holes ro for discharging the tea scraps at the lower ends to the outside.

Next, the operation of the cut-end bend device described above will be explained. First, when the pair of feed claws 5a and 5b are advanced in the direction of arrow A, the lead frame II at the bottom of the stocker 6 set on the upper surface of the rail 2 of the transport platform I is moved by the feed claws 5 m +
5b, and is transported while being placed on the guide rails 2 of the transport platform 1. Then, the feed claws 5a, 5b move further to the point shown in FIG. 1(a).
As shown in (b), when the lead frame II is stopped with the stepped portions 7a and 7b exceeding the stepped portion 4 of the guide rails 2 of the conveyance platform 1, the lead frame II is moved to the stepped portion 7a.

7b and rides on the advancing side feeding claws 6a and 5b. Subsequently, when the feed claws 5a and 5bf are moved back and returned to the initial position, the end of the subsequent stage of the lead frame 1z is pulled back to the step 4 of the guide rail 2 of the transport platform 1,
When the feed claws 5 a r 5 b are completely removed from the lead frame 11, they fall downward due to the suction force of the square holes 9 of the slotted die 8, which are connected to the vacuum pump that has been activated in advance, resulting in the state shown in FIG. , the left end of the outer frame of the tab series lead frame 11 is set in the cutting area P1 of the guide rail 2 of the conveyance table 1 with the left end part of the outer frame in contact with the step 4 of the guide rail 2 of the conveyance table I. . When the setting of the lead frame II in the cutting area P1 is completed in this way, the lead frame II is cut by a mold having a cutting part and a bending part. At this time, the scraps generated from the lead frame 11 are removed from the square holes 9 of the carrier I.
It is discharged to the outside through the through hole IO.

Next, by operating the feed claws 5c and 6b in the same manner, the lead frame 11 that has already been cut is pushed by the tips of the feed claws 5h and 5b and sent to the bending area P2, and a new lead is transferred from the stocker 6. Frame II is set in cutting area P1 of conveyance platform I.

Thereafter, by operating the mold in the same manner, the lead frame II in the cutting area Pi is cut, and the lead of the lead frame 11' in the bending area P2, which has already been cut, is bent. By repeating the above operations, the series lead frame is cut/doped/doped.

[Problems with background technology]

However, in the cut-end bend device described above, the lead frame 1 d to the cutting area Pl
Send the setting') Claw 5-.

Since the lead frame 11 is pulled back to the initial position of the lead frame 5b during the retreating operation, and the lead frame 11 falls naturally due to the suction force of the vacuum, when the lead frame 11 is not pulled back sufficiently or a lead frame with a deformed outer frame is used. The times are set offset as shown in FIG. As a result, during cutting with a mold, the punch or punching die may be damaged, the lead frame may be deformed, and product defects such as chipping or cracking of the sealing resin may occur, reducing productivity.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a lead frame cut end pendant device which has a uniform structure and can correct positional deviations in the cutting area of a lead frame and set the lead frame with high precision.

[Summary of the invention]

The present invention provides a claw for correcting the misalignment of the lead frame in the cutting area of the conveyance platform, and sets the lead frame in a predetermined position by operating the correcting claw every time at the timing when the feeding claw returns to the initial position. The main objective is to prevent damage to punches and punching dies due to misalignment, deformation of lead frames, and even chipping and cracking of the sealing resin, thereby improving operating rates and yields. .

[Embodiments of the invention]

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 4(a) and 4(b).

2Z in the figure is a first conveyance platform in which a plurality of first guide rails 22 parallel to each other are formed in the longitudinal direction on the upper surface by groove processing, and this first conveyance platform 21 is a base. It is fixed on 23. A second conveyance table 24, which is lower than the conveyance table 21, is arranged on the right side wall of the first conveyance table 21, and the second conveyance table 24 is fixed on the base 23. Said second
A plurality of second guide rails 25 parallel to each other are formed on the upper surface of the conveyance table 24 by groove machining.
..., and between the bottom surface of the groove between the first guide rail 22... of the first transport platform 2I and the second guide rail 25... of the second transport platform 24. It is on the same level as the groove bottom. These lead frames are conveyed onto the guide rails 22, 25, and so on with their sealing resin inserted between the guide rails. In addition, the above-mentioned No. 1. A step 26 is formed at the boundary between the second conveyance tables 22 and 24, and falls toward the second conveyance table 24 side. The claw 9, this step 26 is the guide rail 22...
. , 25 . . . A punching goug and a square hole (both not shown) formed in the punching goug are provided in the area of the second conveyance table 24 (cutting area PI) near the step 26.

In addition, 27m and 27b in the figure correspond to the above-mentioned collection 1. The first and second guide trays /L' 2 of the second transport platform 21.24
2..., 24... are a pair of feed pawls arranged in advance and retreat along the interval. These feed claws 27a.

27b is the first guide rail 22 of the first conveyance table 21.
. . . A stepped portion 29a for hooking the lead frame in the stocker 28 installed above.

29b is formed. In addition, these step portions: 19t
h, 29b when the feed claws 27h, 27b advance to a predetermined position and stop. Second transport platform 21.24
It is formed so as to be located 1 to 3 spaces in the traveling direction from the step z6 between them. The feeding claws 27m and 27b on the right side of the step portions 29a and 29b are set higher than the second g-id rail 25 of the second conveyance table 24. The feed claws 27a, 27b are a sliding block 32 consisting of a block body 30 and cylindrical bearing parts 311L, 31b integrally attached to both ends of this body 300 in parallel with each other.
The bearing is fixed to the upper surface of the portion 31a r31b with a screw or the like. The sliding block 32 has its bearing portion 31
Axes 33h, 3 parallel to each other via a, 31b
3b, and these shafts 33 a r
33b are supported at both ends by L-shaped supports 34 fixed on the base 23. An elongated hole 35 is provided at the center bottom of the block body 3o of the sliding block 32, and a rotating body 37 supported at the other end of an arm 36 that reciprocates with one end as a fulcrum is installed in this elongated hole 35. It is inserted. This arm 36 has a link 38
A cam 39 is connected through the cam 39, and a rotating shaft 4I of a motor 40 is pivotally attached to the cam 39.

By rotating the rotary shaft 4I of the motor 40 clockwise, the cam 39 rotates, and the arm 36 connected via the link 38 reciprocates with one end as a fulcrum. The sliding block 32 having an elongated hole 35 into which the rotating body 37 at the other end is fitted is the shaft 33a,
It is designed to be able to reciprocate along 33b. Also,
Bearing portion 31 m + 3 l of the sliding block 32
Lever 42g, 42b for vertically moving the vertically movable block described later is fixed to the inner side surface of b with screws or the like, and the tips of these levers 42a, 42b are tapered. Further, a roller 43 for regulating the sliding of the slide shaft (described later) is attached to the side surface of the tip end of one bearing portion 31fL of the sliding block 32 via a support plate 44.

A slide shaft 46 rotatably supported by two slide bearings 45a and 45b is disposed below the outer side of the one shaft 33m.
It is arranged parallel to h. In addition, the slide bearing 45
a and 45b are fixed on the base 23. The slide shaft 4 protrudes from the left slide bearing 45m.
A number of stoppers 47 are provided at the left end of the slide shaft 46 to restrict the movement distance of the slide shaft 46 in the right direction. Further, a support ring 49 is attached to the right side surface of the left slide bearing 45m via a ring 48. An annular bearing plate 5 is attached to the slide shaft 46 near the left slide bearing 46g.
A coil spring 51 is attached to the slide shaft 46 between the plate 5o and the support ring body 49, and the coil spring 51 biases the slide shaft 46 to the right through the plate 50. It is wrapped. In addition, when the sliding block 32 is in the initial position in the right direction, the bearing plate 50 is in the bearing portion 31m.
The coil spring 5 is in contact with a roller 43 attached to the coil spring 5.
This has the effect of restricting the slide shaft 46 from moving rightward against the urging force of 1.

Furthermore, two contact plates 52g and 52b are vertically mounted at a predetermined distance from each other on the slide shaft 46 near the right slide bearing 45b. These plates 52m, 52b
A sliding roller 253 is disposed between them so as to be movable up and down, and the sliding roller 53 is attached to one end of an L-shaped connecting plate 54. The other end of the connecting plate 54 extending in the vertical direction is fixed to a slide plate of a correction claw, which will be described later.

Further, a correction claw moving mechanism 55 for moving the correction claw up and down and forward and backward is disposed in the hollowed out portion of the first conveyance platform 21. This moving mechanism 55 is disposed between the shafts 33m and 33b, and moves up and down along two guide shafts 56g and 56b that are arranged in a direction perpendicular to the guide rails 22, 25, . A vertical movement block 57 is provided.

Note that the guide shafts 56m and 56b are fixed on the base 23. Disc-shaped stopper portions 58a and 58b are attached to the upper ends of the guide shafts 56a and 56b, respectively, and each stopper portion between these stopper portions 58h and 58b and the upper surface of a slide bearing (not shown) of the vertical movement block 57 Coil springs 59h and 59b are provided on the guide shafts 56g and 56b, respectively, for urging the vertical movement block 57 downward.
is wrapped. Said shaft 3 J a e J J b
On both sides of the vertical movement block 670 on the side, there are two V-groove rollers 60a that guide the sliding plate of the correction claw, which will be described later.
60tt, 60b, 60b are rotatably attached by screws 61... In addition, the shafts 33g and 33b
A pair of rollers 62 a e 62 b are rotatably provided on both side walls of the vertically movable block 57 . These rollers 62m and 62b are connected to the sliding block 3.
2 moves to the right, the bearing portion 31 of the block 32
h, the tip of the lever 42am 42b attached to 31b? iJ? When the wide levers 42m and 42b are brought into contact with each other from the cheek part, the vertical movement block 57 is moved by the coil springs 59 of the guide shafts 56m and 56b.
a.

It has the effect of pushing upward against the urging force of 59b. A notch 63 is formed on the left side of the vertically movable block 57 so that the other end of the connecting plate 54 can be moved. Note that 64 in the figure is a stopper bar that restricts the downward movement of the vertically movable block 57, and this stopper bar 64 is fixed on the base 23.

Then, the ■groove roller 60a+ of the vertical movement block 57
A slide plate 65 is slidably arranged between 60m and 60b, and the V-groove roller 60m is formed on both side walls of the slide &65.

60g, 60b, 60b are fitted with Te/e processing. One end of the slide plate 65 is connected to the abutting plate 52a on the left end bottom surface (rear end bottom surface).

The other end of the above-mentioned connecting plate 54 attached to the sliding roller 53 between 52b is fixed with a screw or the like. Further, on the upper right end surface of the slide plate 65, a fixing plate 66 having a concave cross section is erected from two opposing sides of the first conveyance table 2I. A correction nail support block 67 placed on the first guide rail 22 of the first conveyance table 21 is fixed to the upper end of the fixing plate 66 with screws or the like.

A pair of correction claws 68IL168b are attached to the upper surface of the block 67 and arranged vertically and parallel to each other at a predetermined distance. Note that these correction claws 688, 68b are
The correcting claws 68m and 611b are disposed parallel to and between the first guide rails 22 of the transport platform 2I, and have key-shaped tips.

Next, the operation of the cut-end pend device of the present invention will be described in FIGS. 4(a), (b) and 5(a), (
This will be explained with reference to b)'.

First, a desired number of lead frames 69 each having a plurality of resin-sealed semiconductor elements are stored in the stocker 28 . Next, rotate the motor 4ze clockwise,
When the cam 39 attached to the rotating shaft 41 is rotated by half a rotation, the arm 36 connected to the cam 39 via the link 38 rotates to the right using the other end as a fulcrum, and the rotating body 37 at one end of the arm 36 is inserted. Sliding block 3 that opens the elongated hole 35
2 is on the right side along the two axes 33g and 33b (Fig.
a), (b) move in the direction of the arrow in the middle). When the sliding block 32 moves to the right in this way, the feeder claws 27h and 27b fixed to the upper surface of the bearing portion 31 & 31b
are moved in the same direction along the first guide rails 22 of the first conveyance table 2Z, and the lead frame 69 at the lowermost end of the stocker 28 moves between the feed claws 27g, 27b (D step portion 29a).

29b, and is transported while being placed on the first guide rails 22 of the first transport platform 21.

The feed claws 27h and 27b further advance as shown in FIG. 5 (IL).

As shown in (b), the tip side is the second g of the second conveyance table 24.
Idle rail 25...enters between the steps and the stepped portion 29h
, 29b is the first. Step 26 between the second transport platform 21 and 24
When the feed claw 27a is stopped after crossing the step, the feed claw 27a on the right side with the stepped portions 29a and 29b as the boundary.

27b portion is the second guide rail 25 of the second conveyance table 24.
...Because it is set higher, the lead frame 69
is placed on the feed claws 27m and 27b.

Also, in the process of sliding the sliding block 32 to the right, the roller 43 attached to the bearing JZa of the block 32 moves to the right so that the bearing of the slide shaft 46 separates from the plate 50, and 1, the movement of the plate 50 is released and the coil spring 5 is held by the roller 43.
1 moves the plate 50 to the right, and the slide shaft 46, which is attached to the plate 50, similarly moves to the right.

However, since several stoppers 47 are provided at the left end of the slide shaft 46, the slide shaft 46 is stopped after moving a certain distance. When the slide shaft 46 moves a certain distance to the right in this way, the two shafts mounted on the right side of the slide shaft 46
The sliding roller 53 between the contact plates 52a and 52b similarly moves to the right, and the L-shaped connecting plate 54 whose one end is fixed to the roller 53 similarly moves.

However, the slide plate 65 fixed to the other end of the Q connecting plate 54 is connected to the V-groove roller 60 a + of the vertical movement block 57.
617 m and 60b, the support block 67 moved to the right along between 60b and connected to the slide plate 65 via the fixing plate 66 is guided by the first guide rail 22 of the first conveyance table 21. to move to the right. The result is shown in Figure 5(a).

As shown in (b), a pair of correction claws 68a and 68b supported by the support block 67 move rightward along between the second guide rails 25 of the second conveyance table 24. Tsumashi,
It moves away from the lead frame 69 on the feed claws 27 a p 27 b.

Furthermore, when the sliding block 32 slides to the right, the levers 42a and 4'2b attached to the two bearing parts 31h and 31b of the block 32 move to the right, and the tip of the levers 42a and 4'2b move to the right. A roller 62a on the side wall of the vertical movement block 57 of the correction claw moving mechanism 55.

62b comes into contact with the lower surface and is pushed upward, and as a result, the lower moving block 57 contacts the upper surface of the block 57 and the stopper portions 58h, 58b at the upper ends of the two guide shafts 56a, 56b.
The guide shaft 56a between.

It moves upward along the guide shafts 56g, 56b against the urging force of the coil nozzle 59th, 59b wound around the coil nozzle 56b. In this way, when the vertically movable block 57 moves upward, the V-groove rolls 60B and 60m provided on both upper surfaces of the block.

The slide plate 65-1tZ, which is sandwiched between ), (b) The block 6 as shown in K
The two correction claws 68a and r68b fixed to 7 are raised. In addition, the said Reno-42a.

42b is a pair of rollers 62IL that are involved in the upward movement of the tip of the tapered part and the vertical movement block 57 in the state of FIGS. 4(a) and 4(b) (the state in which the sliding block 32 is in the initial position) Distance from 62b to feed claw: 17
Since the stroke from the initial position of a and 27b to the stop of movement in the right direction is sufficiently short, the tips of the feed claws 27a and 27b are located near the tips of the correction claws 6B a e 68b of the second conveyance table 24. The correction claws 68h and 68b rise before moving between the two guide rails 25. Therefore, when the arm 36 is moved from the state shown in FIG. 4(,), (b) to the state shown in FIG. During the movement of the feed claws 27m and 27b, the rightward movement restriction of the slide shaft 46 by the roller 43 of the slide block 32 is released, and the slide rows 253,
The correction claws 68a, 68b are moved to the right by the sliding plate 65 connected to the connecting plate 54, and the levers 42m, 42b of the sliding block 32 push up the rows 262m, 6, 2b of the vertical movement block 57, and move them up and down. V-groove rollers 60a, 60th and 60b of block 57.

By raising the slide plate 65 between 60b, etc., the correction claw 6R
h, 68b rises, and the feed claw 27a.

When the lead frame 69 is moved to a predetermined position of the feed claw 27b and stopped, the lead frame 69 is placed on the feed claws 27a and zvb.

On the other hand, when the motor 40 is rotated again and the cam 39 is turned half a turn clockwise, the sliding block 32 moves to the left (in the direction of arrow B in FIG. The claws 27m and 27b also move to the left, and along with this, the feed claw 27g on the right side with the stepped portions 29h and 29b as boundaries.
, 27b, the lead frame 69 rests on the 1st.
The second conveyor table 21, 24 is pulled back in the direction of the step 26 at the boundary, the feed claws 27a, 27b are completely removed from the lead frame 69, and the second g-id rail 25 of the second conveyor table 24...
・Get in between. In the process of moving the feed claws 27a and 27b to the left, they are fixed to the sliding block 32 and the tapered portions at the tips of Z-42a+42b are separated from the lower surface of the rollers 62m and 62b on both side walls of the vertical movement block 57, and the guide shaft Coil springs 59h, 59 wound around 56a, 56b
The vertical movement block 57 moves toward the guide shaft 56 due to the biasing force b.
m, 56b, and along with this, the V-groove roller 6 (7a + 6
(Slide plate 65 sandwiched between 7a, 60b, and 60b)
moves downward, and two correction claws 68a are connected via the slide plate 65, fixed plate 66, and support block 67,
68b is lowered and its key-shaped tip is placed on the second conveyor table 24.
Guide rail 25...Inserts between. Then, just before the feed claws 27m and 27b (sliding block 32) return to their initial positions, the roller 43 fixed to one bearing portion 3111 of the sliding block 32 is moved to the plate 50, which is pivoted to the slide shaft 46. Since the plate 50 moves to the left against the biasing force of the coil spring 49 wound around the slide shaft 46, the slide shaft 46 moves to the left, and the abutting plate of the slide shaft 46 moves to the left. The sliding roller 53 between 521L and 52b similarly moves to the left, and as a result, the sliding plate 65 connected to the roller 53 via the connecting plate 54 moves to the V-groove rollers 60a and 60h on the upper surface of the vertically moving block 57. and 60b,
Move to the left along between 60b and fix plates 66m, 66
b.

Correction claws 68g and 68b connected to the slide plate 65 via the support block 67 move to the left. the result,
The correction claw 68 that has already passed through the feed claw 27 a r Z 7 b and moves the right side of the lead frame 69 on the second guide rail 25 of the second conveyance platform 24 to the left
m, the second guide rail 25 of 68b... is moved to the left (in the direction of the step 26 between the first and second conveyance tables 21° and 24) by coming into contact with the key-shaped tip inserted between them, Figure 4 (
a).

As shown in (b), the lead frame is set in a predetermined cutting area P. Lead frame 6 like this
After setting the lead frame 69 in the entire cutting area P1, the lead frame 69 is cut by a mold having a cutting part and a bending part. At this time, the scraps generated from the lead frame 69 are discharged to the outside through a vacuumed square hole and a through hole (none of which are shown) provided in the second transfer table 24.

Next, motor 40. Sliding Glock 32 etc. feed claw 2
When 7a and 27b are similarly moved to the right, the feed claw 27
Before the tips of a and 27b reach the vicinity of the correction claws 68a and 68b, the correction claws 6BIL and 68b have already completed their rightward and upward movement, so the cutting has been done. - The reverse movement of the irregularity 9 is not restricted by the correction claws 68m and 68b, and the feed 9 claws 27a and 27
The tip of the lead frame 69 is sent to the bending area P2 of the second conveyance table 2'4, and the sliding block 32 is returned to the initial position, and a new lead frame 69 is transferred from the stocker 28 to the bending area P2 of the second conveyance table 2'4.
+112 It is accurately set in the cutting area P1 of the feed table 24. After this, when the mold is operated in the same way, the lead frame 69 in the cutting area P1 is cut, and the cutting has already been done.
The leads of the lead frame 69' in the cutting area P2 are bent. By repeating the above two operations, the lead frame is cut and bent.

According to the cut end pend device of the present invention,
In addition to the feed claw, a correction claw is provided, and by making the correction claw move up and down, forward and backward, taking into account the timing of the feed claw's operation, the lead frame can be placed in a predetermined cutting area on the conveyor table with high precision and reproducibility. Since it can be set well, damage to punches and punching dies due to misalignment in the cutting area of the lead frame, as well as cracks in the lead frame's sealing resin, can be eliminated, improving operating rates and yields. can be achieved.

Note that the drive member for the feed pawl and the drive member for the correction pawl t&-1 constituting the positioning mechanism according to the present invention are not limited to the above embodiments, and of course can be freely modified in design within the range that achieves the operation. be.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to provide a cut end pendant device that can set a lead frame in a cutting area with high precision and good reproducibility, thereby achieving an improvement in operation rate and yield. .

[Brief explanation of the drawing]

Fig. 1 (,) is a schematic plan view showing a conventional lead frame cut-end pend device, Fig. 1 (b) is a schematic front view of the device shown in Fig. 2 (,), and Figs. 2 and 3 are respectively conventional Fig. 2 shows a schematic front view when the lead frame is set correctly, and Fig. 3 shows a schematic front view when the lead frame is set misaligned. It is a diagram. Figures 4(a), (b) and 5(a), (b)
) shows a lead frame cutting end pendant device according to an embodiment of the present invention, FIG. ) is a schematic front view of the same figure (, ),
FIG. 5 (-) is a schematic plan view of the same apparatus showing the beam being conveyed in the middle of conveyance, and FIG. 5 (b) is a schematic front view of the same figure (-).・First guide V-ru,
23... Base, 24... Second transport platform, 25... Second f idle rail, 26... Step, 27a * 27b
... Feed claw, 28... Stocker, 29g, 29b.
...Step part, 32...Sliding block, 36...Arm, 39...Cam, 40...Motor, 4:la, 4
2b... Lever, 43-o-ra, (5a, 45
b-Slide bearing, mistake = knowledge 46...Slide shaft, 51, 59a, '59 b-Coil spring, 55...Correction claw moving mechanism, 56h, 56b.
... Guide shaft, 57 ... Vertical movement block, 60 a
+ '60 b...V groove roller, 62a, 62b...
・Roller, 65...Slide plate, 67・Support block, 6B&, 68b...Correction claw, 69, 69'...Lead frame.

Claims (1)

[Claims] It consists of a transport mechanism that continuously supplies a lead frame having a plurality of resin-sealed semiconductor elements, a cutting section that cuts the lead reinforcing material of the lead frame, and a bending section that bends the leads of the lead frame after cutting. Cut end pend with mold if
A lead frame cut-end bending apparatus, characterized in that a positioning mechanism is provided for positioning the lead frame supplied from the transport mechanism at a predetermined position of the cutting section of the mold.