JPH07315320A - Automatic forming device, rotary table, punch for forming lead terminal of electronic parts, and forming method thereof - Google Patents

Abstract

PURPOSE:To rotate a rotary table at a high speed while preventing electronic parts from slipping out of place. CONSTITUTION:A number of recessed grooves 19 in which electronic parts can be fitted, are formed at the circumferential face of a rotary table 18 at every equal angular pitch. The electronic parts are sucked in the recessed grooves 19 by the action of negative pressure through a path 50 connected to the bottom of the recessed grooves of the rotary table. For instance, forty eight recessed grooves 19 are formed and the rotary table 18 is divided at every 7.5 deg..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention cuts electronic parts on a lead frame and supplies the cut parts to a rotary table.
While the tally table is intermittently fed while holding electronic parts, the lead terminals are molded into a predetermined shape, the defective parts are judged by judging the quality of the electronic parts, and the good parts are carrier taped. Automatic forming machine for electronic parts which is housed in a concave part and sealed with a cover tape, a rotary table for the same, a punch for forming a lead terminal of the electronic part, and a forming method. Regarding

[0002]

2. Description of the Related Art Capacitors, resistors, coils, switches,
In response to chipping of electronic parts such as variable resistors and crystal oscillators, and improvement of automatic mounting technology on printed circuit boards,
The application range of packaging using plastic embossed tape (carrier tape) is expanding.

Chip-type electronic parts (chips) are
The electronic component is mounted on the dframe and is cut from the lead frame, and the lead terminal is formed into a predetermined shape. Then, it is judged whether the product is defective or not by shape check and characteristic check to exclude defective products, only the good product is stored in the recess of the carrier tape, and the recess of the carrier tape is sealed by the cover tape. Allows electronic parts to be packaged
Have been jingled.

The cutting station for cutting the electronic component from the lead frame, the forming station for molding the lead terminal of the electronic component, the shape of the electronic component after molding, and the electrical characteristics are checked. Checking station to identify defective products and remove defective products.
The electronic component is packaged by being accommodated in the concave portion of the tape, a cover tape attached to the carrier tape, and a taping station for sealing the concave portion.

Devices corresponding to the respective stations, that is, a cutting device, a forming device, a checking device, and a taping device are provided. Therefore, an automatic processing machine called an automatic forming machine for electronic parts is constituted by the cutting device and the like.

In a conventional automatic forming machine for electronic parts, generally, the electronic parts are caused to flow in a linear conveying path,
A cutting device, a forming device, a checking device, and a taping device are sequentially arranged along a linear transport path. Then, while the electronic components are sent from one end to the other end of the transport path, a series of processes for packaging the electronic components are completed.

However, in this type of automatic forming machine in which the cutting devices and the like are arranged in a straight line, it is inevitable that the forming machine becomes long in the direction of the conveying path, and it is difficult to downsize.

Therefore, a cutting device or the like is arranged around the rotary table, and the cut electronic parts are held on the rotary table, and the rotary table is intermittently fed. There is provided a rotary table type automatic forming machine which completes the packaging during one rotation (see, for example, Japanese Patent Laid-Open No. 03-119798).

With this construction in which a cutting device and the like are arranged around the rotary table, the automatic forming machine can be made compact without lengthening in a specific direction.

[0010]

In recent years, there has been an increasing demand for an automatic forming machine for electronic parts to have a high processing speed and a large number of processed products.

Here, cutting (cutting), molding (forming), pass / fail judgment (checking), and packaging (taping).
Rotation from cutting time, forming station, checking station, and taping station from each time required for ping)
The stop time (residence time) of the table is determined. The rotational speed (intermittent feed speed) of the rotary table, that is, the processing speed of the automatic forming machine is determined from the maximum time of the cutting time, the molding time, the quality judgment time, and the packaging time. To be

Usually, it takes a maximum time for molding, and the rotational speed of the rotary table is determined from the molding time.
Therefore, the molding process is divided into two or three times, and the molding time is dispersed to shorten the molding time. However, even if the molding time is dispersed to reduce the individual molding time, it is difficult for the maximum molding time to be less than or equal to the time required for cutting, quality judgment, and packaging. -It remains a factor in determining the rotation speed of the bull and the processing speed of the automatic forming machine.

If the molding time is shortened in this way,
The rotation speed of the tally table can be increased. However, even if the rotary table is rotated at a high speed, if the electronic parts are not transported to the forming station, only the waiting time (loss time) is increased, and the rotary table is rotated.
The table is not rotated at a high speed substantially, which makes it difficult for the automatic forming machine to perform a high-speed processing.

That is, in order to rotate the rotary table at a high speed and process it at a high speed, not only the forming time is made as small as possible, but also the electronic parts are quickly conveyed to the forming station. , It is desirable to minimize the loss time to wait for the supply of electronic components ----.

Even in the conventional forming automatic machine, a considerable processing speed is obtained. However, recently, the required number of electronic components has increased, and an automatic forming machine capable of ensuring a higher processing speed is desired.

In a conventional automatic forming machine for electronic parts utilizing a rotary table, a rotary tape is used.
The bull is equipped with a suction arm (suction head). Then, the cut electronic parts are sucked up by vacuum (negative pressure).
Adsorbed to the tip of the rotary table, and as the rotary table rotates, the suction arm on the rotary table is sent in the next station (forming station) direction. .

Then, in the forming station, for example, the lead terminal forming punch of the forming device is lowered to clamp the electronic component between the punch and the bending die (die), and the suction arm is placed. The lead terminals of the electronic components are molded.

However, in the forming station,
If the electronic components are not accurately positioned with respect to the punch and the bending die, the lead terminals cannot be accurately formed.

By the way, in the horizontal plane which is orthogonal to the electronic components which are sucked by the suction arm and sandwiched in the vertical direction, the rotary
The table is rotating intermittently. In such a configuration in which the sandwiching direction of the electronic component and the rotation direction of the rotary table are orthogonal to each other, the suction arm is attracted to the suction arm by intermittent rotation of the rotary table and inertia at the time of stop. As it is, there is a possibility that the electronic component may be (laterally) displaced.

If the displacement causes the electronic component to deviate from the proper position, it becomes difficult to accurately mold the electronic component by a punch or a bending die before molding. Also,
After molding, the quality cannot be accurately determined, and it becomes difficult to store the electronic component in the concave portion of the carrier tape.

Particularly, in the checking station, the shape of the molded electronic component is checked together with the electrical characteristics, and the shape check is performed by image processing. Therefore, if the shape of the electronic component is made defective on the image due to the displacement even though it is normally molded, it is automatically excluded as a defective product.

Therefore, only in the range that does not cause a deviation,
The rotary table cannot rotate at high speed.

Further, since the suction arms are mounted on the rotary table, the number of suction arms usually corresponds to the index number of the rotary table. However, it requires a considerable amount of space to install the adsorption arm on the rotary table.
The number of adsorption arms is limited due to the requirement of space. If the number of suction arms is small, loss time is likely to occur, and from this point also, it becomes difficult to process electronic parts at high speed.

For example, in Japanese Patent Laid-Open No. 03-119798,
The indexing angle of the rotary table is set to 22.5 °, and only 16 suction arms (360 / 22.5 = 16) can be installed on the rotary table.

Further, even if 90 ° molding (right angle bending) is performed, an accurate bent shape of 90 ° cannot be obtained due to back tension. Therefore, lower the punch vertically to 90 °
After molding, it is necessary to move the punch inward and apply a molding corresponding to the return due to back tension to the lead terminal. That is, it is necessary to add two operations to the punch, which are a vertical operation and an inward moving operation, and this also limits the shortening of the molding time. In addition, the forming device is structurally complicated.

The present invention relates to an automatic forming machine for electronic parts and a rotary machine for the same, in which the rotary table can be rotated at a high speed without causing any deviation in the electronic parts.
The purpose is to provide the table.

The present invention provides an automatic forming machine for electronic parts which can eliminate the deviation of the electronic parts and enable high speed rotation of the rotary table and shorten the molding time. Has another purpose.

Another object of the present invention is to provide a punch and a molding method for molding a lead terminal of an electronic component, which can shorten the forming time.

[0029]

To achieve this object, according to the rotary table of the present invention, a large number of recessed grooves into which electronic parts can be fitted are conformally formed on the peripheral surface. Has been formed. Then, a negative pressure is applied to the concave groove via a flow path communicating with the bottom of the concave groove of the rotary table so that the electronic component can be adsorbed in the concave groove.

Further, according to the lead terminal molding punch of the present invention, the punch body is formed into a rotor shape, and the rotatable roller is projected from the end of the punch body under elastic force. In both cases, the protruding position of the roller is defined. For example, at the other end of the holder whose one end is pivotally supported by the punch body,
The roller is rotatably mounted, and elastic force is applied to the roller by a compression coil spring with a holder interposed.

[0031]

Since the electronic parts are adsorbed in the concave grooves on the peripheral surface of the rotary table, the (lateral) displacement of the electronic parts can be prevented by the side walls of the concave grooves, and the rotary table can be protected. High speed rotation is possible.

Further, electronic parts can be sucked onto the rotary table only by forming a concave groove on the peripheral surface of the rotary table, and an independent member such as a conventional suction arm can be provided. It becomes unnecessary. Since the groove can be formed innumerably on the peripheral surface of the rotary table, the index number of the rotary table can be set innumerably. Therefore, the occurrence of loss time is prevented,
From this point as well, high-speed rotation of the rotary table, that is, high-speed processing of electronic components becomes possible.

The roller protruding from the rotor-shaped punch body under elastic force clamps the lead terminal of the electronic component between the roller and the bending die, and the roller is driven to rotate. hand,
The lead terminal is molded while rotating while pressing under elastic force. Then, the roller freely projects or retracts in accordance with the shape of the bending die.

Therefore, after the roller is retracted and the lead terminal is molded at 90 °, the roller is rolled corresponding to the depression of the bending die.
If the la is projected, molding over 90 ° can be performed continuously. That is, in one operation of rotationally driving the punch body, 90 ° molding and molding corresponding to the return due to back tension can be continuously performed, and the molding time can be shortened.

[0035]

Embodiments of the present invention will now be described in detail with reference to the drawings.

An automatic forming machine 10 for electronic parts according to an embodiment of the present invention is mounted on a lead frame 12,
For example, after cutting the chip (electronic component) 14 of the tantalum capacitor (see FIGS. 2A to 2D) and molding the left and right lead terminals 15 into the predetermined shape shown in FIG. Judge,
Defective products are removed and stored in the recess of the carrier tape, and the cover tape is attached to the carrier tape to seal the recess.

The structure will be briefly described. As shown in FIG. 1, the automatic forming machine 10 is provided with a rotary table 18 which is intermittently fed by an intermittent drive feeding means 16 at a substantially central portion. Other components such as a cutting device are arranged around the rotary table so that all steps are performed while the rotary table rotates once.

In the embodiment, the indexing angle of the rotary table 14 is 7.5 ° and 48 indexing positions are formed. As shown in the figure, 6 of A, B1, B2, B3, C and D are formed. It is supposed that a predetermined process is performed in each station.

Station A is a cutting station, and the cutting device 20 is a rotary table 18.
It is arranged around. The lead frame 12 is conveyed and supplied from the component supply means 22 in a vertically standing state,
14 is cut from the lead frame 12 by a cutting device 20 at station A. Cut chips
14 is held in the rotary table 18, and the rotary table
It is transported clockwise as the bull rotates.

In the embodiment, the forming station comprises the first to third stations B1, B2 and B3, and the forming devices 26, 27 and 28 are the stations B1, B2 and B3. They are arranged around the rotary table 18, respectively.

As shown in FIG. 1, in the first forming station B1, the tip of the lead terminal 15 of the chip 14 has 90
Bending forming (right angle bending) is performed. Then, the right angle bending of the root of the lead terminal 15 is divided into the second and third forming stations B2 and 3 so as to avoid damage at the root, and the chip is bent twice at right angles. After that, it is molded into a predetermined shape.

Then, the chip 14 is sent to the checking station C, and the shape and characteristics are checked by a checking device 30 such as an image checker (industrial camera) of CCD or a contact probe. Then, the quality is judged and defective products are eliminated.

Further, the chip 14 has the following taping step.
Then, the tape is transferred from the rotary table 18 to the recess of the carrier tape by the taping device 32 and stored therein, and the recess is sealed by the cover tape. Then, the carrier tape is wound up, and all the steps are completed.

The automatic forming machine 10 is provided with a control means 36 having a built-in micro computer (microcomputer) 34, and constituent members such as the intermittent drive means 16 and the component supply means 22 are controlled. All of them are connected to the means and their operations are controlled.

The configuration and operation of the automatic forming machine 10 will be described in detail below. First, referring to the lead frame 12, as shown in FIG. 2, the lead frame is formed by mounting a plurality of, for example, eight tantalum capacitor chips (electronic parts) 14. A guide hole 37 for pitch feeding is formed in the lead frame.

Regarding the supply of the chips 14 to the cutting station A by the component supply means 22, for example, the lead frame 12 is conveyed to a predetermined position by an endless belt (not shown). For example, the endless belt is formed with a large number of long grooves that are orthogonal to the running direction on the surface, and the lead frame 12 is inserted into the long grooves of the endless belt with the guide hole 37 standing vertically downward. Be transported.

When it is conveyed to a predetermined position, the lead frame is
From the right end of FIG. 3, the frame 12 is fed between the pair of feed rollers 40, sandwiched between the feed rollers 40, and fed into the sprocket 41. For example, a lead frame
Pressurized air is applied to the left end of 12 to exert a pressing force, and suction force by the pressurized air is generated at the right end of the lead frame, so that the lead frame is fed by a roller 40.
It is automatically sent in the meantime.

Sprockets 41 and 42 of the component supplying means 20 are arranged with the cutting device 20 sandwiched between them. The sprockets 41 and 42 engage with the guide holes 37 of the lead frame to provide the lead frame. Cutting station while sending 12
At A, the tip 14 is cut from the lead frame by the cutting device 20.

The lead frame 12 from which the tip 14 has been cut is delivered from the left sprocket 42 through a pair of feed rollers (not shown). In addition, a pair of sprockets 4
1, 42 are synchronously driven by being connected to the output shaft of a motor 46 via an endless belt 44.

In the conventional structure, the suction arm (suction head) is installed on the rotary table, and the chips are sucked and conveyed by the suction arm. On the other hand, in the present invention, as shown in FIGS. 3 to 5, the rotary table 18 is used.
A concave groove 19 is formed on the peripheral surface 18a of the above, and a negative pressure (vacuum) is applied to the bottom of the concave groove to allow the chip 14 to be adsorbed in the concave groove.

That is, as can be seen clearly from FIGS. 4 and 5, a large number of concave grooves 19 are formed on the peripheral surface 18a of the rotary table 18, and the flow path 50 communicates with the bottom of the concave grooves. Formed, vacuum tube 52 is connected to the flow path. Of course, the vacuum tube 52 is connected to negative pressure means such as a vacuum pump.

In the embodiment, in consideration of the processability of the flow path 50, the rotary table 18 comprises a pair of upper and lower disks 18U and 18L. And the upper
The radial flow path 50U1 and the vertical flow path 50U2 formed on the disk 18U include the radial flow path 50L1 on the upper surface of the lower disk 18L and the vertical flow path 50L2 inside the lower disk.
The bottoms of the concave grooves 19 are communicated with the vacuum tube 52 in sequence.

In this structure, if a negative pressure is applied to the bottom of the recess 19 via the vacuum tube 52, the chip 14 can be adsorbed in the recess. The radial flow path 50L1 connecting the vertical flow paths 50U2 and 50L2 may be formed not on the upper surface of the lower disk 18L but on the lower surface of the upper disk 18U.

As described above, the concave groove 19 communicating with the flow path 50 provided in the rotary table 18 is formed on the peripheral surface of the rotary table.
The chip 14 can be adsorbed on the rotary table only by forming the adsorbent 18a, and an independent adsorbing member such as a conventional adsorbing arm (adsorption head) is unnecessary. Then, the suction means (recessed groove) is structurally extremely simplified as compared with the conventional suction arm, the installation space is also extremely small, and innumerable suction means (recessed groove 19) are formed. Can be set.

Of course, the width D (FIG. 5 (B)) of the groove 19 is slightly larger than the width d (FIG. 2 (A)) of the chip, and the (lateral) deviation of the chip 14 is the side wall of the groove. Is surely prevented by. Therefore, the rotary table can be rotated without considering the (lateral) displacement of the chip 14 in the concave groove 19, and the rotary table can be rotated.
High speed rotation of the bull becomes possible.

Further, innumerable concave grooves (suction means) 19 can be formed on the peripheral surface of the rotary table 18, and, for example, in the embodiment, 48 concave grooves 19 are formed in the rotary table. It is formed conformally on the circumference of 18 and correspondingly the rotary table 18
The indexing angle is 7.5 ° (360/48 = 7.5) (Fig. 5
(See (A)).

For example, in JP-A-03-119798, 16 suction means (suction arms) are mounted, whereas in the embodiment of the present invention, 48 times, which is three times that of the suction means, are provided. Since the suction means (concave groove 19) is mounted to prevent the occurrence of loss time, high speed processing is possible also from this point. Of course, the number of the concave grooves 19 is not limited to 48, and can be appropriately determined in consideration of the chip width and the like.

The rotary table 18 is basically the same as the conventional one except that the groove 19 is formed in the peripheral surface 18a to form the vacuum passage 50. .

The structure of the rotary table 18 is schematically shown with reference to FIG. 4. The rotary table is a cable.
The case is rotatably placed on a frame 54, and the case is fixed to a frame 56. An index table 58 having an indexing device, which is the intermittent driving means 16, is placed below the frame 56,
The rotary table 18 is intermittently fed at a pitch of 7.5 ° by driving an intermittent driving means (indexing device) 16 linked to the motor.

As shown in FIG. 6, the cutting device 20
Is composed of a pair of cutters 60 (60R, 60L) arranged with the upright lead frame 12 sandwiched between them, a pilot pin 62, and a stripper 64, and is fixed to the fixed cutter 60L. The cutter 60R protrudes intermittently and the lead frame 12
Configured to disconnect the tip 14 from the.

In the embodiment, the stripper 64 is formed in a substantially L-shape with its tip bent and is slidably (movably) arranged behind the movable cutter 60R and the pilot pin 62. Then, insert a guide hole 66 in the bent portion 64a of the stripper tip.
The a and 66b are provided to guide the cutter 60L and pilot pin 62.

The operation of the cutting device 20 will be briefly described. First, the pilot pin 62 moves forward to move the lead frame.
The lead frame 12 is positioned by being inserted into the guide hole 37 of the frame (see FIGS. 6A and 6B).

Then, the stripper 64 advances to sandwich the lead frame 12 with the side surface of the fixed cutter 60L (see FIG. 6C). Then, the movable cutter 60R advances and the tip 14 is cut from the lead frame 12 (see FIG. 6 (D)).

Here, during the operation of the cutting device 20, the negative pressure V acts on the recess 19 through the flow path 50, and the tip 14 cut from the lead frame 12 is recessed by the negative pressure V.
Immediately adsorbed in 19.

The upper end of the stripper 64 is obliquely cut off, and a negative pressure V is applied to the cutout 64a. Therefore, the upper end portion of the lead frame 12 which becomes a cut piece by cutting the tip 14 is sucked from the cutout portion 64a,
Will be eliminated.

The rotary table 18 is rotated while the chip 14 is adsorbed in the concave portion 19 on the peripheral surface and is sequentially sent to the forming stations B1, B2, B3, and the forming devices 26, 27, 28
Molded by.

The three forming devices 26, 27 and 28 are basically equal to each other. First, the forming station B1
The forming device 26, which is placed at the same position and bends the tip of the lead terminal 15 at a right angle, will be described.

As shown in FIG. 7, the forming device 26
Includes a lead terminal forming punch 66 and a corresponding bending die (die) 68. In the present invention, the punch 66
Is characterized in that a bending die (die) 68 is sandwiched and rotor-shaped punches are arranged above and below the bending die 68.

The upper and lower punches 66 are the same, and
A rotatable roller 72 provided on a punch-shaped punch body 70 is made to project from the end of the punch body under elastic force, and the protruding position of the roller is defined (limited) by a stopper.

An embodiment of the punch 66 is shown in FIGS.
First, the punch main body 70 will be described. As shown in FIG. 9, the punch main body 70 is formed in a rotor shape having a pair of disc-shaped side walls 73. And the hole (round hole) 74 is 90
Four side walls 73 are formed apart from each other, and four long holes 76 are formed on the side wall 73 between the holes 74 and separated from each other by 90 degrees. In addition, the shaft 70a of the punch body is provided between the side walls 73.
Further, four holes (round holes) 78 are formed 90 ° apart from each other.

As can be seen from FIG. 8 (B) showing the punch 66 excluding the side wall 73 on one side (front side) of the punch body 70, a large number of, for example, four holders 80 are pivotally supported at one end on the punch body 70. It is arranged so that it can swing and its free end (the other end)
A roller 72 is rotatably attached to the roller. That is, the holder 80 has a fork shape that is branched into two at the free end side, and the shaft 82a of the holder has a hole 74 in the side wall 73 of the punch body.
Is supported by. The roller shaft 72a is supported by the free end of the holder and extends to the long hole 76 of the side wall 73.

The edge of the holder is notched so as to face the hole 78 of the shaft 70a of the punch body, and the pin 80c is embedded in the notch 80b to form a spring seat. The notch 80b of the holder and the hole of the punch body.
A compression coil spring 82 is arranged between 78. The side wall 73 on one side (front side) of the punch body 70 is formed to have a smaller diameter than the side wall 73 on the other side (rear side) (FIG. 8 (A)).

Since the compression coil spring 82 is located on the free end side of the holder-80, the holder-80 is radially outwardly moved by the elastic force so that the roller 72 of the free end is projected from the holder main body. Is pressed by. Here, as described above, since the roller shaft 72a extends to the elongated hole 76 in the side wall of the punch body, the roller shaft 72a abuts the outer edge of the elongated hole, and The protruding position of 72 is restricted (limited) (Fig. 8
(See (A)).

The amount of protrusion of the roller 72 is, for example, about 1 to 3 mm from the edge of the side wall 73 of the punch body 70. In addition,
The pin 80c of the spring seat extends until it abuts the shaft 72a of the roller, and two setscrews 80d are screwed to the holder 80 so as to prevent the shaft 72a of the roller from falling. 8 (B)
reference).

In the punch 66 having such a structure, the shaft 72a of the roller abuts against the outer edge of the elongated hole 76 and the shaft 72a.
The holder 80 can be swung by the elastic force of the compression coil spring 82 between the position where 72a contacts the inner edge of the elongated hole 76. In other words, the roller 72 projects under the elastic force of the compression coil spring 82 until the shaft 72a comes into contact with the outer edge of the long hole 76, and the shaft 72a extends to the inner edge of the long hole 76. The roller can retreat to the abutting position against the elastic force.

The long hole 76 of the side wall 73 of the punch main body is
It is a guide hole for allowing the swing of 80 to guide the movement of the roller shaft 72a, and also a stopper for defining the protruding position of the roller 72. The hole 76 that serves as a guide hole and stopper is
In the embodiment, it is formed as a long hole, but it is sufficient if the shape has a gap between the inner edge thereof and the roller shaft 72a to allow the swinging of the holder 80, and is not limited to the long hole. .

In the embodiment, the compression coil spring 82 applies the elastic force to the holder 80 and the roller 72. However, a spring member that applies the elastic force in the direction of projecting the roller 72 is sufficient. , Bamboo shoot spring, tension spring, leaf spring, etc. may be used instead of the compression coil spring.

A gear 84 is disposed coaxially with the punch main body 70, and the driving force of the gear 86 is transmitted to the upper and lower gears 84 via the gears 88 and 90, so that the upper and lower punch main bodies move in opposite directions. It is configured to be simultaneously driven to rotate (see FIG. 7).

With such a structure, as will be described in detail later, as the punch body 70 is driven to rotate, the roller of the punch is rotated.
The 72 holds the lead terminal 15 of the chip 14 between it and the bending die 68, and rotates while being pressed by the elastic force along the bending die to form the lead terminal (bending). To do.

The forming device 26 is further provided with a pair of swingable holding plates 92 (92U, 92L), which hold the chip 14 between the roller 72 of the punch and the bending die 68. Terminal
Prior to the sandwiching of 15, the upper and lower root portions of the lead terminal are sandwiched with the bending die to secure the chip 14 (see FIGS. 10 to 14). The pair of pressing plates 92
U and 92L have the same shape except that they are upside down.

In FIG. 13, in order to avoid complication of the drawing,
The upper holding plate 92L is omitted and the lower holding plate 92L is shown together with the bending die 68. In FIG. 14, only the upper holding plate 92U is shown.

The pair of pressing plates 92U, 92L are fixed and supported by corresponding supporting blocks 94 by bolts 95, respectively, and the two supporting blocks 94 sandwich a block (fixing block) 96 and are mounted on a shaft 98 together with the fixing block. Installed.

Here, while the support blocks 94 of the pressing plates 92U and 92L are rotatably supported by the shaft 98, the central block 96 has a split mold shape as shown in FIG. Then, a bolt (not shown) is screwed into the tap hole 96a from the left side of FIG. 13 and fixed to the shaft 98. That is, the central block 96 is fixed to the shaft 98, and the upper and lower support blocks 94 are rotatable.

As can be seen from FIGS. 11 and 14, a pair of spring posts 100 are screwed to the left surface of the central block (fixed block) 96, and the L-shaped spring posts 102 are provided.
Are screwed to the back surfaces of the upper and lower support blocks 94, respectively, and a tension coil spring 104 is stretched between them.

The stopper pin 106 is a fixed block.
96 It is screwed on the upper surface, and the support block 94 is attached to this stopper pin.
The front 94F of the can be contacted.

In this structure, when viewed from above in FIG. 14, the support block 94 receives an elastic force that rotates the support block 94 counterclockwise with respect to the shaft 98, so that the front surface 94F of the support block 94 is fixed. It abuts against the stopper pin 106 of the fixed block and is pressed.

Therefore, when the shaft 98 is driven to rotate counterclockwise, not only the fixed block 96 fixed to the shaft 98 but also the support block 94 pressed against the fixed block follow the fixed block and integrally rotate. Then, the pressing plate 92 of the support block can sandwich the upper and lower root portions of the lead terminal 15 with the bending die 68.

Then, after the pressing plate 92 of the support block holds the lead terminal 15 of the chip 14 with the bending die 68,
When the shaft 98 is driven to rotate further, the fixed block 96 rotates integrally with the shaft 98. But support block
94 does not rotate following the fixed block 96 and stays in that position, preventing excessive rotation of the support block 94.

In this way, since the support block 94 is prevented from excessive rotation, the pressing plate 92 on the support block is bent.
It is not forcibly pressed by 68, and the pressing plate is prevented from being deformed or damaged. And, nevertheless, the pressing plate 92 can firmly hold the lead terminal 15 with the bending die 68 under the elastic force of the tension coil spring 104.

As shown in FIGS. 11 and 12, the shaft
A swing arm 108 is provided at the lower end of 98, and a cam follower 110 is rotatably attached to its free end. Further, the cam 11 is formed on the side wall of the frame 112 of the forming device 26.
4 is provided and has an L-shaped spring post 116 on the swing arm.
The cam follower 11 is provided by a tension coil spring 118 installed between the spring and a spring post (not shown) on the frame.
An elastic force for pressing 0 to the cam is applied to the swing arm 108.

In FIGS. 11 and 12, reference numeral 112a indicates a part of the frame 112, and a bearing is built in this frame part to rotatably support the shaft 98.

In this structure, the swing arm 108 swings in accordance with the rotation of the cam 114 and drives the shaft 98 to rotate, whereby the pressing plate 92 holds the lead terminal 15 therebetween. Prior to the clamping of the lead terminal of the tip 14 between the roller 72 and the bending die 68, the pressing plate 92 rotationally drives the shaft 98 so as to clamp the lead terminal between the bending die 68. Needless to say, is adjusted.

Incidentally, as shown in FIG. 10, the bending die 68 is bolted onto a block 119 extending between the side walls of the frame 112 of the forming device 26. Bending die 68
As shown in FIG. 15, the upper and lower punches 66 are formed symmetrically, and the lead terminals 15 of the chip are pressed against the upper and lower surfaces of the bending die, so that two forming operations are performed at the same time. Be seen.

A concave portion 68a is provided on the front surface of the bending die 68, and the concave portion is formed at such a height that the chip 14 adsorbed by the rotary table 18 can enter the concave portion from the side. The front surface of the bending die 68 left above and below the recess 68a.
At 68b, the lead terminal 15 of the chip 14 is pressed against the pressing plate by 92. The upper and lower surfaces of the bending mold 68 are sloped in a reverse taper shape and are recessed, and the recess 68c is used to perform bending corresponding to the back tension.

The gears 84, 88, 90 for transmitting the rotational driving force to the punch body 70 are all pivotally supported by the frame 67 of the punch, and as shown in FIG. -Extending to the side wall of the frame 112 of the frame device and being pivotally supported. Therefore, the frame 67 of the punch is the shaft 88a of the gear 88.
It is configured to be swingable around. Then, adjust the swing position of the upper and lower punch frames 67 to adjust the upper and lower frames.
The space between the frames 67, that is, the space between the rollers 72 of the upper and lower punch bodies is adjusted.

In the embodiment, as can be seen from FIG. 16, a bolt 67a is screwed to the upper wall of the frame 67 of the upper punch, and the bolt 67a is attached to the head 67b of the bolt on the upper surface of the side wall of the frame 112.
Are brought into contact with each other to adjust the swing position of the upper punch frame 67. Further, a bolt 67c is screwed to the frame 112 from the lower side to the upper side, and the bolt 67c is brought into contact with the lower wall of the frame 67 of the lower punch to swing the frame 67 of the lower punch. The moving position is adjusted.

A circular arc hole 120 centered on the shaft 88a of the gear 88
Are formed on the side wall of the frame 112 of the forming device. Then, through the arc hole 120, the bolt 122
Is screwed to the side wall of the punch frame 67 to fix the swing position of the upper and lower punch frames 67.

Re-forming of the chip 14 by the forming device 26
The molding of the terminal 15 is performed as follows.

FIG. 17A shows the state immediately after the tip 14 is attracted to the rotary table 18 and sent to the front of the bending die 68.
Shown in (B). In this state, the tip 14 partially enters the recess 68a of the bending die 68 from the side, and the punch roller 72 and the pressing plate 92 are both located away from the tip 14.

When the cam 114 rotates and the shaft 98 is driven to rotate, in FIG. 13, the pressing plate 92 swings counterclockwise, separating the tip 14 from the rotary table 18,
The lead terminal 15 of the chip 14 is pressed against the front surface 68b of the bending die 68 to sandwich the lead terminal with the bending die (see FIG. 18).

When the shaft 98 is rotationally driven, the punch body 70 is also rotationally driven at the same time, so that the roller 72 of the punch 66 approaches the tip 14. However, when the pressing plate 92 clamps the lead terminal 15 with the bending die 68, the roller 72 is still located in front of the chip 14 and the molding has not started (Fig.
18).

Further, when the punch body 70 is driven to rotate, the roller 72 protruding from the end of the punch body 70 is bent.
The lead terminal 15 of the chip 14 is sandwiched between the chip 68 and 68. Then, the roller 72 is pressed under the elastic force along the upper surface and the lower surface of the bending die 68, and is rotated by frictional force to rotate the lead terminal.
Mold 15. Forming at forming station B1
In the molding by the forming device 26, the roller 72 is connected to the lead terminal 15
Moves in a direction orthogonal to and 90 ° forming (right angle bending) is performed (see Fig. 1 and Fig. 19).

Here, the upper and lower surfaces of the bending die 68 are sloped in a reverse taper shape and are recessed (see FIG. 15B). Therefore, after the roller 72 retracts against the elastic force and bends the lead terminal 15 at a right angle, the roller protrudes by the elastic force corresponding to the recess 68c on the upper and lower surfaces of the bending mold, and the roller is rotated 90 °. Molding that exceeds the limit is continuously performed (see Fig. 19 (A)). In this way, by providing the recesses 68c on the upper and lower surfaces of the bending mold, it is possible to continuously perform 90 ° molding and molding corresponding to the return due to back tension in one operation of rotationally driving the punch body 70. That is,
Right angle bending considering back tension can be done in one operation,
Molding time can be shortened.

As a matter of course, in the forming device 26, the roller 72 is retracted to perform right-angle bending, and then the upper and lower punches have a length such that the rollers 72 protrude corresponding to the recesses 68c on the upper and lower surfaces of the bending die. The spacing of the rollers 72 is adjusted and this adjustment is made by the bolts 67b, 67c as described above.

In FIG. 19B, L1 is the closest distance between the rollers 72 of the upper and lower punches during molding, Lo is the distance between the upper and lower rollers when the roller 72 is retracted, and ΔL is The amount of protrusion of the roller 72 corresponding to the depression of the bending die is shown. Then, by adjusting the frame 67 of the upper and lower punches so that the distance between the rollers 72 of the upper and lower punches is equal to or smaller than the distance L1, the right-angle bending considering the back tension is performed. It can be done by the ming device 26.

Immediately after the lead terminals 15 are bent at a right angle in consideration of back tension by the rollers 72 of the upper and lower punches, the cam followers 110 move to the valleys of the cams 114.
The shaft 98 is driven to rotate in the opposite direction, that is, clockwise,
The pressing plate 92 is separated from the lead terminal 15, retracted, and returned to the initial position.

Here, except in the case of being located at the intermediate portion of the stations D to A in FIG. 1, the concave groove is provided at other positions.
Negative pressure is always acting on 19. Therefore, when the pressing plate 92 retracts and the chip 14 is released from being held by the pressing plate and the bending die 98, the chip is immediately adsorbed in the concave groove 19 and does not drop off.

The forming devices 27 and 28 arranged in the forming stations B2 and B3 are different from the forming station B1 except that the pressing plates are not provided and the shape of the bending die is different. The forming device 26 has the same structure.

To avoid damage to the root, lead terminal 15
The right-angled bending of the root of the is divided by the forming devices 27 and 28 into two 45 ° steps (see FIG. 1).

When the forming devices 27 and 28 are bent at 45 °, it is impossible to form the lead terminals 15 while sandwiching the roots of the lead terminals 15. Therefore, the bending molds 168 of the forming devices 27 and 28 are It is enough to press 14 from the side, as shown in Fig. 20,
It only needs to be tapered. In the embodiment, the same bending die 168 of the forming devices 27 and 28 is used, but other bending dies having different front heights may be used.

Forming by the forming devices 26, 27 and 28 is illustrated.
21 (A) to (C). As can be seen from FIGS. 21 (B) to 21 (C), in the case of bending at 45 °, the intervals L2 (for the forming device 27) and L3 (for the forming device 28) between the rollers 72 of the upper and lower punches. ) Is the closest distance between the rollers 72 of the upper and lower punches, a predetermined 45 ° bending can be performed smoothly, and thus, the frame of the upper and lower punches of the forming devices 27 and 28 can be assured.
67 are adjusted respectively.

45 degrees of 2 degrees by the forming devices 27 and 28
The root of the lead terminal 15 is bent at a right angle by the bending, and the chip 14 molded into a predetermined final shape through the two right-angled bending is attracted to the concave groove 19 of the rotary table 18. And sent to the checking station C and the taping station D.

Checking device C for checking station C, taping device for taping station D
As for 32, a generally known one can be used and is not an essential part of the present invention, so will be described briefly.

For example, the checking device 30 is a well-known device, and is a CCD image checker (industrial camera).
The shape (outer shape) of the chip 14 is checked with, and the electrical characteristics of the chip 14 are checked with a contact probe to determine the quality. Then, the chip (defective product) 14 determined to be defective is separated from the groove 19 on the circumferential surface of the rotary table by lowering the push rod from above the rotary table 18, for example. Then, it falls into the collection box and is stored.

Further, the chip 14 has the following taping step.
The tape is transferred to the recess D in the carrier tape from the groove 19 and stored in the recess of the carrier tape of the taper 32. The cover tape is used to seal the recess, and the carrier tape is wound up. Is completed.

For example, when the chip 14 is transferred from the groove 19 to the recess of the carrier tape and stored, the push rod is lowered from above to separate the chip 14 from the groove 19, and the rotary shaft is rotated.
This can be easily done by feeding the chip into the recess of the carrier tape with a slider that moves from the inner side to the outer side in the radial direction on the lower surface of the table 18. Of course, this is an example, and the chip 14 may be housed in the recess of the carrier tape by another configuration.

The above-mentioned embodiments are intended to explain the present invention, and do not limit the present invention at all, and all modifications and alterations within the technical scope of the present invention are also included in the present invention. It goes without saying that it will be done.

[0118]

As described above, since the electronic component is adsorbed in the concave groove on the peripheral surface of the rotary table, the (lateral) displacement of the electronic component can be prevented by the side wall of the concave groove, -High speed rotation of the tally table becomes possible.

Further, electronic parts can be sucked onto the rotary table only by forming a concave groove on the peripheral surface of the rotary table, and an independent member such as a conventional suction arm can be provided. It becomes unnecessary. Further, since the groove can be formed innumerably on the peripheral surface of the rotary table, the index number of the rotary table can be set innumerably and the occurrence of loss time can be prevented. , The rotary table can be rotated at high speed, that is, electronic parts can be processed at high speed.

The roller protruding from the rotor-shaped punch body under the elastic force clamps the lead terminal of the electronic component between the roller and the bending die, and the roller is free depending on the shape of the bending die. Then, the lead terminal is molded by projecting or retracting. Therefore, in one operation of rotationally driving the punch body, right-angle bending considering the back tension can be easily performed, and the molding time can be shortened.

By incorporating a punch in which the roller is protruded from the rotor-shaped punch body under elastic force into the forming device, the molding time of an automatic forming machine for electronic parts can be shortened. .

Under the elastic force, the roll of the electronic component is relieved between the roller protruding from the end of the rotor-shaped punch body and the bending die.
In a molding method in which a lead terminal is clamped and a roller is rotated along the bending die while pressing it under elastic force to form a lead terminal, right angle bending considering back tension is a series of operations. It can be done continuously and the molding time can be shortened.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an automatic forming machine for electronic parts according to the present invention.

[FIG. 2] (A) and (B) are plan views and front views of electronic components (chips) before cutting, and (C) and (D) are enlarged front views and enlarged right side views of electronic components after cutting. FIG. 6E is an enlarged front view of the electronic component after molding.

FIG. 3 is a schematic partial plan view of an automatic forming machine in the vicinity of station A.

FIG. 4 is a schematic front view of the rotary table (including an enlarged view of a break).

5A is a plan view of a rotary table, FIG. 5B is an enlarged plan view of fracture, and FIG. 5B is an enlarged front view of fracture.

6 (A) to 6 (D) are a series of operation diagrams showing movements of a pilot pin, a stripper, and a cutter of a cutting device at station A. FIG.

FIG. 7 is a schematic left side view of the forming device in which the left side wall of the frame is omitted.

FIG. 8A is a front view of a punch of the forming device,
(B) is a front view of the punch in which a side wall located in front is omitted.

9A is a top view of a rotor-shaped punch body, FIG. 9B
Is a front view.

FIG. 10 is a schematic front view of a forming device.

FIG. 11 is a schematic left side view of the forming device.

FIG. 12 is a front view of the pressing plate and its related members as seen from the front of the forming device.

FIG. 13 is a schematic perspective view showing a positional relationship between a bending die, a pressing plate, and a chip.

FIG. 14 is a schematic perspective view of a pressing plate and its related members.

15A is a plan view of a bending die, and FIG. 15B is a front view.

FIG. 16 is a schematic right side view of the forming device.

17 (A) is an operation diagram (plan view) showing the positions of the roller and the pressing plate before the start of right-angle bending near the tip, and FIG. 17 (B) is an operation diagram (front view).

FIG. 18: Roll after the start of right angle bending near the free end
It is an operation diagram showing the positions of the la and the pressure plate.

FIG. 19 (A) is an operation diagram showing the position of the roller and the pressing plate at the end of the right-angle bending near the free end, and FIG. 19 (B) is a schematic diagram showing the interval between the upper and lower rollers. .

20A is a plan view of another bending die, and FIG. 20B is a front view.

21 (A), (B), and (C) are forming stations.
It is the schematic which shows the space | interval of the upper and lower rollers at the time of shaping | molding in B1, B2, and B3, respectively.

[Explanation of Codes] 10 Automatic Forming Machine for Electronic Parts 12 Lead Frame 14 Electronic Parts (Chip) 15 Lead Terminal 16 Intermittent Driving Means 18 Rotary Table 19 Rotor Tape Concave groove (suction means) 20 on the peripheral surface of the bull 20 component supply means 26, 27, 28 forming device 30 checking device 32 taping device 34 microcomputer 36 control means 50 vacuum passage 60 (60L, 60R) Cutter 62 Pilot pin 64 Stripper 66 (For forming lead terminal) Punch 68, 168 Bending die (die) 70 Punch body 72 Roller 74 Long hole (guide hole, stopper) 80 Holder-82 Compression coil spring (Spring member) 92 Holding plate 95 Support block 96 (Fixed) block 98 Shaft 104 Extension coil spring 108 Swing arm 110 Cam 112 Cam follower

Claims (14)

[Claims] 1. A cutting device for cutting an electronic component on a supplied lead frame from the lead frame, and a plurality of recessed grooves into which the electronic component cut by the cutting means can be fitted. Is provided equiangularly in the concave groove, and a negative pressure is applied to the concave groove via a flow path communicating with the bottom of the concave groove so that electronic components can be adsorbed in the concave groove, and the rotary feed is intermittently fed. Tee
A negative pressure means for applying a negative pressure to the concave groove via a flow path communicating with the bottom of the concave groove on the peripheral surface of the rotary table to adsorb the electronic component in the concave groove. Forming device for forming a lead terminal of an electronic component sucked in the concave groove of the tally table into a predetermined shape by a punch and a corresponding bending die, and an electronic component formed into the predetermined shape Checking device that determines whether the product is good or bad and rejects defective products, and stores good electronic parts in the recess of the carrier tape, and attach the cover tape to seal the recess of the carrier tape. And a taping device, and a cutting device, a forming device, a checking device, and a taping device are arranged around the rotary table in this order. Ming automatic machine. 2. A punch of a forming device comprises a rotor-shaped punch body which is rotationally driven; one end of which is pivotally supported by the punch body and a rotatable roller which is attached to the other end of which is swingable. A holder, a spring member that presses the holder outward in the radial direction to project the roller from the edge of the punch body, and a stopper that regulates the protruding position of the roller, and is used for rotationally driving the punch body. Accordingly, the roller of the punch clamps the lead terminal of the electronic component between the roller and the bending die, and the roller of the punch rotates while being pressed by the elastic force of the spring member along the bending die. The automatic forming machine for electronic parts according to claim 1, wherein the terminal is molded. 3. A roller shaft is brought into contact with an outer edge of a guide hole formed on a side wall of the punch body and through which the shaft of the roller is inserted, under elastic force. The automatic forming machine for electronic parts according to claim 2, wherein the guide hole serves as a stopper by restricting the protruding position. 4. A punch of a forming device comprises a rotor-shaped punch body that is rotationally driven; equidistantly arranged on the punch body between left and right sidewalls, and one end of which is pivotally supported by the punch body. A plurality of swingable holders each having a rotatable roller attached to the other end; and a spring member for pressing the holders radially outward to project the rollers from the edge of the side wall of the punch body. And a guide hole through which the shaft of each roller is inserted is formed in the side wall of the punch body. The guide hole is punched when the roller shaft comes into contact with the outer edge of the guide hole under elastic force. It is formed in a shape that regulates the protruding position of the roller from the side wall of the main body and has a gap between the inner edge of the side wall of the main body and the axis of the roller to allow swinging of the holder. As it is driven, the roller of the punch clamps the lead terminal of the electronic component between it and the bending die, And rotation while being pressed under the resilient force of the spring member along the mold Li - follower of the electronic component of claim 1, wherein shaping the de Terminal - timing automatic machine. 5. The forming device is a punch roller,
Prior to sandwiching the lead terminal of the electronic component between the bending molds,
5. The electronic component according to claim 2, further comprising a pair of swingable holding plates for clamping the upper and lower root portions of the lead terminal with the bending die to fix the electronic component. Forming automatic machine. 6. Each pressing plate is supported by a supporting block, and each supporting block is rotatably attached to a shaft sandwiching a fixed block fixed to a shaft that is driven to rotate. 6. The fountain of the electronic component according to claim 5, wherein a spring member is installed between them, an elastic force for rocking the pressing plate in the bending die direction is applied to each support block, and the rocking position of the support block is restricted by the fixed block. -Ming automatic machine. 7. An electronic component on a lead frame is cut and supplied to a rotary table, and while the rotary table is intermittently fed while holding the electronic component, An electronic device in which lead terminals are molded into a predetermined shape, defective parts are excluded by judging the quality of electronic parts, defective parts are stored in the recesses of the carrier tape, and the recesses are sealed by the cover tape. In an automatic component forming machine, a large number of concave grooves that can be fitted with electronic components cut from a lead frame are conformally formed on the peripheral surface of the rotary table to form concave grooves. Negative pressure is applied to the groove through a flow path that communicates with the bottom of the machine, the electronic components after cutting are adsorbed in the groove, and the electronic components are placed in the groove on the peripheral surface of the rotary table. While adsorbed,
An automatic forming machine for electronic parts characterized by forming lead terminals and judging quality. 8. An electronic component cut from a lead frame is held and intermittently fed, and during one revolution, molding of a lead terminal, judgment of quality of electronic component and elimination of defective product, carrier In a rotary table for an automatic forming machine for electronic parts that stores electronic parts in the concave part of the tape, a large number of concave grooves into which electronic parts can be fitted are conformally formed on the circumferential surface. An automatic forming machine for electronic parts, characterized in that a negative pressure is applied to the groove through a flow path communicating with the bottom of the groove to adsorb the electronic part in the groove. Rotary table. 9. An electronic component in which a rotatable roller provided on a rotor-shaped punch body is projected from an end of the punch body under elastic force and a protruding position of the roller is defined. Punch for lead terminal molding. 10. A holder having a rotor-shaped punch body, one end of which is pivotally supported and the other end of which is provided with a rotatable roller, is swingably disposed on the punch body and is radially outward. A punch for forming a lead terminal of an electronic component, which applies an elastic force to the holder to press it so as to project the roller from the edge of the rotor and to regulate the projecting position of the roller. 11. A plurality of swingable holders, one end of which is pivotally supported on a rotor-shaped punch body and the other end of which is attached a rotatable roller, are equiangularly formed on the punch body between left and right side walls. Is arranged by a spring member to apply an elastic force to the holder to press the rollers outward in the radial direction, and a guide hole through which the shaft of each roller is inserted is formed in the side wall of the punch body. The guide hole is brought into contact with the outer edge of the roller shaft by an elastic force so as to regulate the protruding position of the roller from the side wall of the punch body, and the inner edge of the guide hole and the roller. A punch for molding a lead terminal of an electronic component, which is formed in a shape having a gap that allows the holder to swing with respect to a shaft. 12. A roller that protrudes from the end of a rotor-shaped punch body under elastic force and is revolved by rotationally driving the punch body while restricting the protruding position of the roller. A lead terminal of an electronic component is sandwiched between a roller and a bending die, and the roller is rotated along the bending die while pressing the roller under elastic force to form a lead terminal. Lead terminal molding method. 13. A punch body, which projects from the end of a rotor-shaped punch body under elastic force and is attached with a roller whose protruding position is restricted, projects from the end of the punch body. The lead terminal of the electronic component is sandwiched between the roller and the corresponding bending die, and the roller is rotated along the bending die while pressing the roller under elastic force to rotate the reel.
A method for molding a lead terminal of an electronic component for molding a lead terminal. 14. A roller-shaped punch body having a rotatable roller that projects under elastic force is driven to rotate, and a roller that projects from the end of the punch body and a corresponding bending die. A lead terminal of an electronic component is formed by sandwiching a lead terminal of an electronic component between them, and rotating the roller by frictional force while pressing the roller under elastic force along a bending die to form a lead terminal. Molding method for terminal.