JPS639680B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to integrated circuits, semiconductor elements, resistors,
This equipment is used for automatic insertion of electronic components into printed circuit boards, which automatically inserts circuit elements such as capacitors into predetermined positions on printed circuit boards, and is used to straighten bent pins of electronic components and cut off their tips. be.

Traditionally, loading electronic components onto a printed circuit board was done manually, but the work of first selecting the desired electronic component, correcting the shape and position of the pins, and inserting it into the specified position on the printed circuit board was extremely time-consuming. It was troublesome and inefficient. Therefore, there is a limit to the number of pieces that one worker can assemble in a day, and it has become impossible to meet the rapidly increasing demand. For this reason, devices for automatically inserting electronic components into printed circuit boards have been developed and put into practical use. For example, a device has been developed that uses a computer to set the address of the IC loading position on a printed circuit board and automatically inserts the IC. However, since the address of the IC insertion position on the printed circuit board is fixed in this automatic insertion machine, there is a drawback that if the position of the circuit board shifts even slightly, it will not be possible to insert the IC. Furthermore, the diameter of the IC pin insertion hole drilled in the board is somewhat increased to absorb the error, but if the insertion hole is made too large, the solder will not flow well when soldering the pin, and the connection will be difficult. It cannot be made too large as this will result in a defect, and it will not be possible to completely eliminate the inability to insert.

Other conventional automatic inserters have attempted to overcome some of the above-mentioned drawbacks by employing a profiling system, which reduces programming effort and allows changes to be accommodated quickly and easily. However, since the pins are not precisely corrected in this insertion machine, the proper insertion rate is low at 90-95%, and there is a high frequency of defective products, which is disadvantageous in that it is uneconomical. moreover
When straightening IC pins, when inserting a pin into a hole in a printed circuit board, the pin is simply gripped, narrowed, and inserted into the hole, so the pin is bent in the direction of narrowing from the beginning. There is a drawback that if the pin gets hit, or if the pin is bent laterally, it will not be able to be inserted. Furthermore, the pins are simply cut after the pins are inserted into holes in the board.

An object of the present invention is to eliminate the above-mentioned drawbacks, to correct and cut pins before inserting electronic components into a printed circuit board, and to provide an appropriately configured pin correction cutter for improving the proper insertion rate. The goal is to provide equipment.

The straightening cut device of the present invention has a plurality of V-shaped recesses that are wide at the top and narrow at the bottom on both inclined sides, and a hole passing through both inclined sides and a hole communicating this hole to the outside. A fixing block having a fixed head and a pair of side walls arranged on both sides of the fixed head, and an electronic component having a plurality of pins on both sides are pressed toward the fixed head so that the pins enter the recesses. a head, a pair of pressing blocks having a plurality of V-shaped convex portions on the distal end surface that fit into the recesses of the fixed head, and slidably supported by the side walls; and a pair of pressing blocks each slidably supported by the side walls. a pair of cutter plates, which are supported by the fixed head and are arranged opposite to each other toward each inclined side surface of the fixed head, and have triangular projections and V-shaped blades alternately formed at their tips; and the pressing block. After correcting the posture of the pin of the electronic component by pressing it against the fixed head from left and right so that the protrusion formed on the tip surface enters into the recess on the inclined side surface of the fixed head, the cutter plate is a pressing block that cuts the tip of the pin in a V-shape while positioning the pin of the electronic component with the protrusion of the cutter plate by inserting the pin from the left and right into a hole formed by penetrating the inclined side surface of the fixed head; The invention is characterized by comprising a cutter plate drive mechanism.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is an external view showing the configuration of an example of an automatic insertion device incorporating a device for correcting and cutting pins of electronic components according to the present invention, in which FIG. 1A is a front view, FIG. 1B is a side view, and FIG. 1C is a side view. is a plan view. The cassette loading section 1a is tilted downward toward the front, and 48 cassettes 2 can be loaded therein horizontally, and the cassettes 2 can be stacked in five stages as shown in the side view. Each cassette is loaded with ICs of the same type, and five cassettes 2 containing the same ICs can be stacked vertically and stored in the cassette holder. In the bottom cassette, the IC falls toward the front due to gravity. Further, the empty cassette 2 falls downward from the cassette holder and accumulates in the cassette receiver. IC selectively ejected from cassette 2
falls onto the horizontal IC transport section 1b. An endless belt 3 is disposed in the conveying section 1b as shown by the dotted line, and is constantly rotating as shown by the arrow during the insertion operation. The IC that has fallen from the cassette loading section 1a is transported to the first A by this belt 1b.
It is sent to the left in the figure and enters the correction cut section 1c. In this correction cut section 1c, as will be described later, the position, shape, etc. of the IC pin are corrected, and the tip is cut into a V-shape. The IC corrected and cut in this way is then sent to the insertion section 1d, where the pins of the IC are grasped by the insertion head, lowered toward the printed circuit board, and the pins are inserted into the holes in the printed circuit board. The printed circuit board is placed on an XY table 1e, clamped by a clamp device, and driven by an X motor and a Y motor. The amount of movement in the X and Y directions is read on a linear scale. Furthermore, operation panel 1
f is provided to perform various controls such as copying control operations. This operation panel 1f is attached to a shaft so that it can be rotated through 90 degrees as shown in Fig. 1C, so that it can be set at a position that is easy to operate. Further, a power supply, a control circuit, a drive circuit, an air pump, etc. are housed in the desk portion 1g.

The proper insertion rate when incorporating electronic components such as ICs, semiconductor elements, resistors, and capacitors into printed circuit boards is mainly determined by the position and quality of the pins of the components. Therefore, in order to improve the proper insertion rate, it is desirable to correct the pin before insertion, and as in the present invention, it is desirable to correct the pin before insertion.
Correcting the pin before insertion is essential in achieving a proper insertion rate of 99% or more. As shown in Figures 2A and 2B, there are cases where the pin 4a is bent in the longitudinal direction, and cases where it is bent in the width direction.If these bends occur at the same time, There is also. Furthermore, in the present invention, the tips of the pins are cut into a V-shape as shown in Figure 2C so that the tolerance between the pin position and the hole position can be as large as possible. Although the above-mentioned mechanisms for correcting the bending of the pin and cutting the tip can be performed separately, the correcting cut section 1c of the present invention, which will be described below, performs these correction and cutting at the same time.

FIG. 3 is a perspective view showing the configuration of an example of the device for correcting and cutting pins of electronic components according to the present invention, with a part of the fixing block cut away, and FIG. A cross-sectional view of part of the configuration,
5 and 6 are front views showing in cross section a part of the configuration of an example of the device for correcting and cutting pins of electronic components according to the present invention, and FIG. It is a perspective view showing the composition of an example of a plate.

The straightening cutting device comprises a fixing block 20, which includes a fixing head 20a, side walls 20b and 2 extending on either side of the fixing head.
0c is provided. In FIG. 3, one side wall 20
C is cut out. The fixed head 20a has a substantially trapezoidal shape, and a substantially V-shaped recess 21 is formed on the inclined side surface of the fixed head 20a.
a, 21b are formed. As shown in FIGS. 3 and 4, a hole 22 extending in the longitudinal direction is formed in the lower portion of the fixed head 20a, and holes 23a and 23b communicating with this hole 22 are formed up to the side surface.
These holes 23a and 23b are for entering a cutting blade, which will be described later, and the hole 22 is for discharging chips produced when the tip of the pin is cut. This evacuation can take place, for example, by sending an air stream. Side walls 20b and 20
A press block is provided with holes 24a and 24b that pass through in the lateral direction, and V-shaped protrusions 25a and 25b that fit into V-shaped recesses 21a and 21b formed on the side surface of the fixed block 20a. 26a and 26b are slidably inserted laterally, and cutter plates 28a and 28b having V-shaped blades 27a and 27b formed on the front surfaces as shown in FIG. 7 are also slidably inserted. As shown in FIG. 6, below the fixed block 20, there are provided a pressing block and cutter plate drive mechanism 30 for pressing the pressing blocks 26a and 26b and cutter plates 28a and 28b against the fixed head 20a. The push block and cutter plate drive mechanism are provided with integral tilting arms 30a and 30b. These arms 3
The lower end of vertical rod 30c connected to 0a and 30b is connected to piston 30d. This piston 30
d is connected to the cylinder block 30 by the O-ring 30e.
The cylinder block 30f moves airtightly in the vertical direction, and air ports 30g and 30h are provided above and below the cylinder block 30f. Vertical rod 30c and cylinder block 30f
An O-ring 30i is also provided between the two. arm 30
a and 30b are cut plates 28a and 2
The arm 30a is slidably passed through the hole drilled in the arm 30a.
When the cutter plates 28a and 28b move up and down, the cutter plates 28a and 28b move left and right. Further, the arms 30a and 30b are connected to the pressing block 2 via coil springs 31a and 31b.
6a and 26b, and as the arm moves up and down, the pressing block also moves left and right. Moreover, the pressing blocks 26a and 2
6b and the side walls 20b and 20 of the fixed block 20
Coil springs 32a and 32b are also provided between the press block and the press block to bias the pressure block outward.

As shown in FIG. 4, above the fixed block 20, a receiving plate 33 for receiving the IC 4 is connected to a pair of guide rods 34.
It is provided so as to be movable in the vertical direction along lines a and 34b. Coil springs 35a and 35b are provided between the receiving plate 33 and the guide rods 34a and 34b, respectively, to bias the receiving plate 33 upward at all times. Receiving plate 3
A push-down head 36 for pushing down the IC 4 together with the receiving plate 33 is further provided above the IC 3. This push-down head 36 is made of an elastic material such as rubber, has a rod 37 connected to its upper surface, and a piston 38 is connected to the tip of this rod 37. This piston 38
is slidably arranged inside the air cylinder 39, and by sending air into the upper part of the cylinder 39 through the air port 39a, the push-down head 36 is pushed down, and the IC
4 so that it is placed on the fixed head 20a. A coil spring 40 is also provided within the cylinder 39 to bias the push-down head 36 upward.

As shown in Fig. 5, there is an IC4 above the receiving plate 33.
A stopper 41 is provided. This stopper 41 moves the levers 41a and 41b, which can be engaged with the top pin of the IC 4 fed into the correction cut section, from the shaft 4.
Rotatably provided around 1c and 41d,
The other ends of these levers are connected to the plunger 42a of the solenoid 42 via a link mechanism 41e. The state shown in FIG. 5 is a state in which the IC 4 can be locked. If the solenoid 42 is now energized, the plunger 42a will project downward, the link mechanism 41e will also be displaced downward, and as a result, the lever 41a will move from the shaft 4
The lever 41b rotates in the direction of the hour hand about 1c, and the lever 41b rotates counterclockwise about the shaft 41d, allowing the stopper 41 to release the IC4.

Next, the operation of the above-mentioned correction cutting device will be explained.

As described above, a predetermined IC 4 selected from a predetermined cassette 2 is conveyed by the belt 3, fed into the correction cut portion 1c from the right side in FIG. 4, and placed on the receiving plate 33. Of course, in this case the stopper 41 is in the operating state shown in FIG. Next, air is sent into the cylinder 39, and the push-down head 3
6 is pushed down, and the IC 4 is pushed down together with the receiving plate 33. In this process of pressing down, the IC
The pins 4a of No. 4 enter V-shaped recesses 21a and 21b formed on both sides of the fixed head 20a, where the vertical bending shown in FIG. 2A is corrected. Moreover, since this side surface widens in the width direction as it goes downward, the pins bent inward in the width direction shown in FIG. 2B are also corrected.
After the IC4 has been pressed down, the cylinder 30f of the pressing block and cutter plate drive mechanism 30
Air flow is sent from the lower air port 30h of the piston 30d and thus the arms 30a and 30b.
push upward. These arms 30a and 30
Pressing blocks 26a and 26 as b rises.
b and the cutter plates 28a and 28b move toward each other. First, the pressure blocks 26a and 26b are pressed against the sides of the fixed head 20a. This pressure contact is made with the coil spring 31a.
and 31b, so it is elastic. At this time, the V-shaped protrusions 25a and 25b formed on the side surfaces of the pressing blocks 26a and 26b correspond to the V-shaped protrusions 25a and 25b formed on both sides of the fixed block 20a.
The pin 4a of the IC is inserted into the letter-shaped recesses 21a and 21b, and corrected by sandwiching the pin 4a between them. This correction mainly corrects the inward and outward bends in the width direction shown in FIG. 2B.

When the arms 30a and 30b are further raised, the cutter plates 28a and 2 shown in FIG.
The tip of the pin 8b comes into contact with the pin 4a, and the blades 27a and 27b cut the pin 4a to a predetermined length, and the tip is cut into a V-shape as shown in FIG. 2C. At this time, the cutter plates 28a, 2
The pin 4 is attached by the triangular protrusion 29a on the front surface of the pin 8b.
Make a V cut at the center of a. After completing the straightening cut in this way, the cylinder 30
The lower air port 30h of f is opened, air is introduced from the upper air port 30g, and the arms 30a and 3
Lower 0b. This lowering causes the cutter plates 28a and 28b to move outward and pushes the pressure blocks 26a and 26b against the coil spring 3.
It is moved outward by the action of 2a and 32b. When this movement is completed, the air pressure in the cylinder 39 is reduced, and the receiving plate 33 is raised by the spring force of the springs 35a and 35b, returning to the initial state shown in FIG. Next, the solenoid 42 shown in FIG. 5 is energized to operate the stopper 41, and the levers 41a and 41b are rotated to remove the IC 4 from the correction cut portion 1c.
From there, it is transferred to the left side as shown by the arrow in FIG. 4 to the next stage insertion section 1d. This transfer can be carried out, for example, by using an air stream and blowing it onto the IC 4.

In the above example, the head 20a with the V-shaped recesses 21a and 21b for correcting the IC pin is fixed, and the IC4 is pushed down from above. It is also possible to configure 20a to be pushed upward from below.

As is clear from the above description, the pin straightening/cutting device for electronic components according to the present invention straightens the pins of electronic components and aligns all the pins at the same angle using the fork of the insertion head. Therefore, the tips of the pins will line up exactly in two rows.
Furthermore, since the tips of the pins are cut into a V-shape, the pins can be inserted correctly into the designated holes even if there is some misalignment between the pins and the holes on the printed circuit boards, which improves the proper insertion rate of electronic components into the printed circuit boards. It has a very powerful effect.

In addition, since straightening and cutting are performed simultaneously, processing efficiency is increased, the device can be made smaller, and control is also simplified.

[Brief explanation of the drawing]

FIG. 1 is an external view showing the overall configuration of an example of an automatic insertion device incorporating a device for correcting and cutting pins of electronic components according to the present invention, in which FIG. 1A is a front view, FIG. 1B is a side view, and FIG. Figure 1C is a plan view, Figures 2A and 2B are a side view and front view showing the defective shape of the IC pin, Figure 2C is a front view showing the V-shaped pin tip, and Figure 3 is a front view showing the tip of the pin cut into a V-shape. FIG. 4 is a perspective view showing the structure of an example of the device for correcting and cutting pins of electronic components according to the present invention, with a part of the fixing block cut away. FIG. FIGS. 5 and 6 are cross-sectional views showing a part of the configuration of an example of the pin straightening/cutting device for electronic components according to the present invention, and FIG. FIG. 3 is a perspective view showing the configuration of an example of a cutter plate of the cutting device. 1a...Cassette loading section, 1b...IC transport section, 1
c...Correction cut part, 1d...insertion part, 1f...operation panel, 2...IC cassette, 4...IC, 4a...IC pin,
20...Fixed block, 20a...Fixed head, 20
b, 20c...side wall, 21a, 21b...recess, 2
2, 23a, 23b, 24a, 24b...hole, 25
a, 25b... Convex portion, 26a, 26b... Pressing block, 27a, 27b... Blade, 28a, 28b... Cutter plate, 30... Pressing block and cutter plate drive mechanism, 30a, 30b... Inclined arm,
30c...vertical rod, 30d...piston, 30e...O
Ring, 30f...Cylinder block, 30i...O
Ring, 31a, 31b, 32a, 32b...Coil spring, 33...Batch plate, 34a, 34b...Guide rod, 35a, 35b...Coil spring, 36...Pushing head, 37...Bar, 38...Piston, 39...Air cylinder , 39a...Air port, 40...Coil spring,
41...Stopper, 41a, 41b...Lever, 41
c, 41d... shaft, 41e... link mechanism, 42... solenoid, 42a... plunger.

Claims (1)

[Claims] 1. A fixed head having a plurality of V-shaped recesses wide at the top and narrow at the bottom on both inclined sides, and a hole passing through both inclined sides and a hole communicating the hole to the outside, and the fixing head. a fixing block having a pair of side walls arranged on both sides; a push-down head for pressing an electronic component having a plurality of pins on both sides toward the fixing head so that the pins enter the recess; a pair of pressing blocks each having a plurality of V-shaped protrusions on its tip face that fit into the recesses and slidably supported by the side walls; A pair of cutter plates are arranged facing each other toward each inclined side surface of the head and have triangular protrusions and V-shaped blades alternately formed at their tips, and the pressing block is formed on the tip surface thereof. After correcting the posture of the pin of the electronic component by pressing it against the fixed head from left and right so that the convex part enters into the recess on the inclined side surface of the fixed head, the cutter plate is inserted into the inclined side surface of the fixed head. A pressing block and a cutter plate driving mechanism are provided, which cut the tip of the pin into a V shape while positioning the pin of the electronic component with the protrusion of the cutter plate by inserting the pin from the left and right into a hole formed through the cutter plate. A device for straightening and cutting pins of electronic components, which is characterized by the following: