JPH02276299A - Extension pin holding and ejecting mechanism of electronic component inserting device - Google Patents

Abstract

PURPOSE:To enable an extension pin to be held, to be moved downward, and to be ejected continuously and smoothly by a method wherein the open-close section of a pin holder is so constituted as to open or close in accordance with the up-down movement of the pin holder. CONSTITUTION:In a device, through which a lead wire 1b of an electronic component is inserted into the hole of a printed board 7 being linearly joined to an extension pin 3, pin holders 11 as many as lead wires are arranged on the upper part of a clinch unit 10. The pin holder 11 is formed of a pipe of metal spring material possessed of such an inner diameter through which the pin 3 can drop freely, and opposed slits 12 open toward the upper end are provided to the upper part of the pin holder 11, two elastically deformable holder pieces 13 are formed, and the pin holder 11 has a protrusion 14 there. Lead wire guide holes 15 are provided in parallel to the clinch unit 10, and grooves 16 and 17 are provided near the upper end and to a prescribed position at the lower part of the hole 15 respectively, where the protrusion 14 of the pin holder 11 is fitted into the groove 16 or 17. When the protrusion 17 is fitted to the groove 16 or 17, the holder piece 13 is made open to receive or make the pin drop and descends holding the pin 3 between the grooves 16 and 17.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an apparatus for inserting an electronic component with a lead wire into a printed circuit board, and in particular, an apparatus for inserting an extension pin into the lead wire in order to guide the lead wire into a hole in the printed circuit board. This invention relates to a mechanism for holding and ejecting the extension pins under the printed circuit board in an apparatus for guiding and inserting the lead wires together with the extension pins into the printed circuit board by joining them in a straight line.

[Conventional technology]

The applicant of the present invention holds the lead wire of an electronic component with an insertion guide from above the component body, and guides the tip of the lead wire to the printed circuit board. Considering that there is a limit to high-density insertion of electronic components, in a previous application (Japanese Patent Application No. 63-218426), an extension pin was connected in a straight line to the lead wire of the electronic component, and the lead wire was combined with the extension pin. We proposed a device that guides and inserts into printed circuit boards. According to this method, there is no need to prepare insertion guides of various shapes depending on the shape and dimensions of the electronic component, and it also has a lead wire that can be inserted without interfering with adjacent components, etc. even in a narrow space. A method and device for automatic insertion of electronic components was proposed.

[Problem to be solved by the invention]

As described above, the present invention is an automatic insertion device that uses an extension pin connected to a lead wire in order to guide the lead wire of an electronic component into a hole in a printed circuit board. An object of the present invention is to provide an insertion device for an electronic component with a lead wire, which can efficiently hold the extension pin and eject the extension pin after the lower end of the lead wire of the electronic component has passed through the board.

[Means to solve the problem]

In order to solve such problems, the present invention provides an apparatus that linearly joins an extension pin to a lead wire of an electronic component and inserts the lead wire into a hole in a printed circuit board while being guided by the extension pin. A pin holder is installed on the clinch unit installed on the underside of the printed circuit board so that it can be moved up and down.
An opening/closing part is provided at the top of the pin holder to grasp the lower end of the extension pin, and the opening/closing part is opened to receive the lower end of the extension pin that has passed through the board hole at the upper end stroke position of the pin holder relative to the clinch unit. An extension pin holding and ejecting mechanism for an electronic component insertion device is provided, which is controlled to close to grip the extension pin at a position and open to eject the extension pin at a lower end stroke position.

[For production]

An opening/closing section provided at the top of the pin holder opens and closes as the pin holder moves up and down. That is, when the pin holder is at the upper end stroke position, the upper end of the holder is open and can receive the lower end of the extension pin that has passed through the board hole. When the pin holder descends from this position, the opening/closing portion closes and grips the extension pin.

As a result, the extension pin descends while being held by the pin holder. When the pin holder reaches the lower end stroke position, the opening/closing section opens again to eject the extension pin downward.

〔Example〕

First, the process of inserting an electronic component with a lead wire into a printed circuit board using an extension pin will be explained with reference to FIG.

(2) A large number of electronic components 1 which are continuously held in the longitudinal direction of the tape mount IC are cut from the mount IC, and the lead wires 1b are made to have an appropriate length in advance.

(2) The first holding mechanism (first clamp) 4 holds a plurality of (two in the figure) lead wires 1b of the electronic component 1 at predetermined insertion intervals. At this time, the electronic component 1 is in a vertical position with the main body 1a at the top and the lead wire 1b at the bottom.

The extension pin 3, which has a diameter large enough to pass freely through the hole 7a of the printed circuit board 7, has a tapered lower end 3a to facilitate insertion into the hole 7a of the printed circuit board, and a hole at the upper end into which the tip of the lead wire can be inserted. 3b. The number of second holding mechanisms (second clamps) 5 is equal to the number of lead wires 1b (two in the figure).
Clamp the top of the extension pin 3 of the book). At this time, the extension pin 3 is located below the lead wire 1b of the electronic component l,
They are maintained vertically parallel to each other at intervals corresponding to the intervals between the lead wires 1b. Then, while the first clamp 4 is still clamping the lead wire 1b, the pushing mechanism (push rod) 6 and the first clamp 4 above the electronic component l are lowered to lower the lead wire 1b.
Place the tip in the hole 3b at the upper end of the extension pin 3, and
are straightly spliced to the lead wire 1b.

(2) After the splicing is completed, the first holding mechanism 4 is opened and retreated to a position where it does not interfere with the lowering of the main body 1a of the electronic component 1 and the push rod. Then, the push rod 6 is further lowered and the extension pin 3 is inserted into the board hole 7a while maintaining the state in which the lead wire 1b and the extension pin 3 are joined.

(2) On the lower surface side of the printed circuit board 7, a third holding mechanism 8 (built in a clinch portion to be described later) for receiving the lower end 3a of the extension pin 3 is waiting. Therefore, the extension pin 3 and the electronic component l are lowered until the lower end of the extension pin 3 reaches this third holding mechanism 8.

During this time, the second holding mechanism 5 also descends at the same time. When the lower end 3a of the extension pin 3 reaches the third holding mechanism 8, the second holding mechanism 5 releases the extension pin 3 and retreats to a position where it does not interfere with the lowering of the main body 1a of the electronic component and the push rod. At this time, the second holding mechanism 5 is located at a position away from the surface of the printed circuit board 7, that is, at a position on the printed circuit board 7 where it does not interfere with adjacent components 1d. At this time, the extension pin 3 is held by the third holding mechanism on the bottom surface of the printed circuit board 7, and the electronic component 1
is supported between the extension pin 3 and the push rod 6.

■While maintaining the support state of lead wire 1b and extension pin 3,
The push rod 6 is further lowered and the lead wire 1b of the electronic component 1 is inserted into the board hole 7a. During this time, the third holding mechanism 8 is also lowered at the same time as described later. The tip of lead wire 1b is in board hole 7
After passing through a, the extension pin 3 is recovered. After the lead wire 1b is inserted, the clinch part bends the lead wire on the bottom surface of the board (not shown), and then the push rod 6 rises, and the third holding mechanism 8, first clamp 4, and second clamp 5 return to their original positions. Return to position.

Next, the structure and operation of the clinch portion constituting the third holding mechanism 8 will be described in detail with reference to FIGS. 1 and 3 to 5. In addition, in the embodiment shown in FIGS. 3 to 5,
It is assumed that the electronic component has three lead wires.

In FIG. 3, the clinch section 8 is located on the lower surface side of the printed circuit board 7, and has a clinch unit 10 supported movably in the vertical direction with respect to a main body base (not shown).

At the center of the upper part of the clinch unit 10, pin holders 11 of a number equal to the number of lead wires of the electronic component (that is, three) are arranged in parallel with the lead wires at equal intervals, and are arranged above and below the clinch unit main body 10. It is supported so that it can move in the direction.

These pin holders 11 are held and driven at their lower ends by a piece 20, as will be described later.

FIG. 1 shows the operation of the pin holder 11. Although only one pin holder is shown in Figure 1, there are actually three pin holders 1
1 are provided and operate simultaneously. The pin holder 11 is made of a pipe made of, for example, a metal spring material, and has an inner diameter large enough to allow the extension pin 3 inserted from above to fall freely. Opposing slits 12 are provided, and two elastically deformable holder pieces 13 of the pipe separated by these two slits 12 are formed. The pipe has projections 14 whose outer diameter is increased at these holder pieces 13.

On the other hand, in order to guide the pin holder 11 in the vertical direction, the clinch unit 10 is provided with three guide holes 15 in parallel at intervals equal to the intervals between the lead wires of the electronic components. The protrusion 14 of the pin holder 11 is placed at a predetermined position near the upper end of the pin holder 10 and at a predetermined position at the lower end of the pin holder 11.
Grooves 16 and 17 with increased inner diameters are provided, into which the grooves 16 and 17 fit. Therefore, as shown in Figure 1, the pin holder 11
When the protrusion 14 fits into the upper groove 16, the pin holder 11 is at the upper end stroke position, and the holder pieces 13 are opened on both sides to receive the extension bottle 3. Also,■
As shown in FIG.
When fitted, the pin holder 11 is at the lower end stroke position, and the holder pieces 13 are similarly opened on both sides to open the extension pin 3.
Be prepared to drop. The protrusions are in the upper and lower grooves 16 and 17.
When the protrusion 14 is in the middle of the guide hole 15 between the guide holes 15 and 15, the protrusion 14 contacts the inner wall surface of the guide hole 15 to close the holder piece 13 and grip the extension bottle 3, and the extension bottle 3 is attached to the pin holder 1.
It is in a state of descending with 1. Incidentally, sloped portions are formed at the upper and lower ends of the protrusion 14 so that the pin holder 11 can smoothly move up and down to perform opening and closing operations.

FIG. 4 is an exploded perspective view of a piece 20 that holds the lower ends of these pin holders 11 and drives them up and down.

In FIG. 4, 21 is a joint piece, and each pin holder 1la111b, 11C passes through it and extends upward.
holes 22. Each pin holder lla, 11b11
The lower end portion of 1C is each holder piece 22a, 22b.

22c. That is, the pin holder lla is inserted into the left hole 24a provided with the slit 23 of the holder piece 22a, and is fixed by tightening the screw 25. The center hole 24b and the right hole 24C are holes through which the respective pin holders llb and llc are allowed to pass through with a certain degree of freedom. Similarly, the pin holder llb is fixed by the center hole 24b with the slit 23 of the holder piece 22b, and the pin holder 11C is fixed by the right hole 24C with the slit 23. There is a pin discharge pipe 26 having a flange 25 on the lower side of the pin holder 11C, and the joint piece 21 and each pin holder 11a%llb,ll
c and the flange 25 have a rubber cushion 2 between them.
They are fixed to each other by screws 28 with 7 in between. Cam followers 29 are attached to both sides of the joint piece 21, and the piece part 20 is driven via these cam followers 29 by a drive mechanism (not shown), and the three pin holders lla and l
lb and llc are simultaneously moved in the vertical direction. A total of four rubber cushions 27 are attached to each bottle holder lla, llb.
, llc and between these pin holders and the holder piece 21 or flange 25 without making them rigid, a certain degree of freedom is ensured so that each pin holder can smoothly move up and down the guide hole 15 of the clinch unit 100. The lower end of each of the pipe-shaped pin holders lla, llb, and IIC opens into a pin discharge pipe 26, and the extension bottle 3 that has fallen inside the bottle holder is discharged downward from the pin holder via the discharge pipe 26.

5 to 7 show a bending (bender) mechanism 30 for bending the tip of the lead wire of an electronic component after the lead wire is inserted into a hole in a printed circuit board. FIG. 5 is a view seen from the arrow ■ in FIG. 5, and FIG. 7 is a view seen from above in FIG. A lead bender driving piece 32 is fitted into a portion 31 near the upper end of the clinch unit 10 so as to be slidable up and down.

A cam follower 33 attached to a lead bender drive link 34 (FIG. 7) is engaged with the piece 32, and the piece 32 is driven up and down via the link 34 and the cam follower 33 by a driving means (not shown). On the other hand, L-shaped drive levers 3 are located on both sides of the top end of the clinch unit body 10.
5 is mounted so as to be swingable around a fulcrum shaft 35a. A cam follower 37 that contacts the upper surface of the piece 32 is rotatably attached to one end of these L-shaped drive levers 35, and a lead bender 36a for bending lead wires of electronic components is attached to the other end, that is, the tip end of the clinch unit. , 36b are attached. Therefore, when the piece 32 is moved upward by the drive means (not shown) via the link 34 and the cam follower 33, the L-shaped drive lever 35 on the near side in FIG. 6 (lower side in FIG. 7) moves counterclockwise. The lead bender 36a bends the lead wires of the electronic components inserted into the printed circuit board from the bottom side of the board. Since the L-shaped drive lever on the other side of FIG. 6 (upper side of FIG. 7) rotates clockwise in the opposite direction, its lead bender 36b bends the lead wire in the opposite direction. Note that when three lead wires are bent by the two lead benders 36a and 36b on the left and right, the negative lead bender 36a bends the two lead wires, and the other lead bender 36b bends the other lead wire. Fold. At this time, the lead vendor 36
It is convenient to move a and 36b in a direction of about 45 degrees with respect to the direction in which the lead wires are arranged and at an angle toward the printed circuit board. Further, the tip of the lead bender 36a for bending the two lead wires is formed with a stepped portion (not shown) for pressing the two lead wires.

FIGS. 8 and 9 show a sensor mechanism for detecting the moving state of the lead wire and extension pin of an electronic component.

As shown in FIG. 8, the sensor 40 that detects the lead wire 1b of the electronic component 1 is located at the tip of the clinch unit 10.
That is, the sensor 50, which is provided at a portion where the lead bender 36 moves and detects the extension pin 3, is connected to the clinch unit 1.
When the upper end of the extension pin 3, which is provided at a predetermined position of 0 and held by the pin holder 11, completely enters the guide hole 15 of the clinch unit 10, its tip (lower end) is detected.

As shown in FIG. 7, the sensor 40 is composed of an optical fiber sensor consisting of multiple pairs (3 pairs) of light emitting elements and light receiving elements arranged so as to transmit light in a direction perpendicular to the direction in which the lead wires are arranged. be able to. Sensor 50 may also have a similar structure and arrangement as sensor 40. However, since the sensor 50 detects the extension pin 3 held by the pin holder 11, the sensor 50
The pin holder 11 must be arranged so that the light passes through the slit 12 of the pin holder 11. Although FIG. 8 shows that the light from the sensor 50 is transmitted from the side for convenience, in reality it is transmitted in a direction perpendicular to the plane of the paper.

Next, the operation of the clinch unit 8 will be explained with reference to FIGS.

(2) As described above, the clinch unit 10 is supported so as to be movable in the vertical direction relative to the main body base (not shown), but in this state, the clinch unit 10 is waiting at the bottom.

■ Upon receiving a predetermined command, the clinch unit 10 rises,
It stops at a predetermined position below the printed circuit board 7. At this time,
Although the upper end of the pin holder 11 has reached a position near the upper end surface of the clinch unit 10, it is still
The pin holder 11 does not protrude upward from the upper end surface of the pin holder 11, so the upper end of the pin holder 11 is closed. On the other hand, the tip of the extension pin 3 passes through the hole in the printed circuit board 7 and comes to a position close to the upper end of the pin holder 11.

■The pin holder 11 moves up by the required stroke relative to the clinch unit 10 to reach the uppermost stroke position, and as mentioned above, the protrusion 14 (Fig. 1) of the pin holder 11 moves into the groove 1.
6 and the upper end of the pin holder 11 opens. Then, the extension pin 3 is slightly lowered to a position where its tip can be received by the upper end of the pin holder 11.

■When the pin holder 11 is lowered, the protrusion 14 is inserted into the groove 16.
Close it and grasp the extension pin 3. Thereafter, the pin holder 11 is lowered in synchronization with the push rod 6 (FIG. 2) of the electronic component, and is lowered together with the lead wire of the electronic component while gripping the extension pin 3. During this time, the lead wire of the electronic component descends while being supported by the extension pin 3 and is inserted into the hole in the printed circuit board 7.

The extension pin 3 is in the predetermined position (that is, the upper end of the extension pin 3 is completely accommodated in the guide hole 15 of the clinch unit 10).
The aforementioned sensor mechanism 40, 50 detects that the lead wire of the electronic component has been lowered to a predetermined bending position after passing through the board hole. When all three extension pins and lead wires are confirmed, a command is given to move on to the next operation, but if any one of them is not confirmed, the next operation does not proceed.

(2) After the above confirmation is performed, the lead bender 30 operates as described above to bend the lead wire of the electronic component.

■After the bending is completed, the pin holder 11 is attached to the clinch unit 1.
0 and reaches the aforementioned lowest stroke 1, the protrusion 14 (FIG. 1) of the pin holder 11 fits into the groove 17, the upper end of the pin holder 11 opens, and the extension pin 3 is released. The extension pin 3 released from the pin holder 11 falls downward within the pin discharge pipe 26, and is recovered below by suitable means (not shown). At the same time, clinch unit 10
is lowered relative to the main body (not shown) and returned to the same standby position as in ■.

〔Effect of the invention〕

As explained above, according to the present invention, the opening/closing part of the pin holder opens and closes according to the vertical movement of the pin holder, so that the extension pin can be grasped, moved downward, and ejected continuously and smoothly. can.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the operation of a pin holder according to an embodiment of the present invention in the order of steps, FIG. 2 is a schematic diagram showing the method of inserting an electronic component with a lead wire in the order of steps according to the present invention, and FIG. 3 is a diagram showing the implementation of the present invention. A schematic diagram showing the operation of the example clinch unit in the order of steps,
Figure 4 is an exploded perspective view of the pin holder piece, Figure 5 is a front view showing the structure of the lead bender, and Figure 6 is the arrow shown in Figure 5.
7 is a plan view of the lead bender, FIG. 8 is a schematic diagram of the sensor mechanism, and FIG. 9 is a diagram showing the head of the clinch unit. 7... Printed circuit board, 3rd holding mechanism (clinch part), 10... clinch unit, 11... pin holder,
12...Slit, 13...Holder piece, 14...
Protrusion, 15... Guide hole, 16, 17...
...Groove, 20...Pin holder piece, 21
...Joint piece, 22a-C...Holder piece, 23...Slit, 24a-c...
・Hole, 25...flange, 26...discharge pipe, 2
7...Rubber cushion, 28...Screw, 29...
・Cam follower. 1...Electronic parts, ■b...Lead wires,
3... Extension pin, 6... Push rod, ■ ■ ■ Working diagram of the pin holder in the example. Insertion process of electronic components with lead wires. (Unit rise) (Pin holder upper limit) Clinch operation of the embodiment Fig. 3 20... Bottle holder piece part Disassembled perspective view of the pin holder piece Fig. ■ ■ ■ Clinch operation of the embodiment Fig. 3 20...・Bin holder piece ↓ VI[ 50... Extension bottle detection sensor Plan view of lead bender Schematic diagram of sensor mechanism Fig. 8 1... Lead bond electronic component 1c... Lead wire 3... Extension bin 7... ...Printed circuit board 10...Clinch unit 11...Bin holder 66...Lead bender 40...Lead wire detection sensor 50...Extension pin detection sensor

Claims (5)

[Claims] 1. Attach the extension pin (3) to the lead wire (1b) of the electronic component (1).
) are connected in a straight line and the lead wire is guided by an extension pin and inserted into a hole in a printed circuit board.
Clinch unit (10) installed under the printed circuit board
A pin holder (11) is provided so as to be movable up and down, and an opening/closing part (12, 13) is provided at the top of the pin holder so that the lower end of the extension pin (3) can be grasped. It is controlled so that it opens to accept the lower end of the extension pin that has passed through the board hole at the position, closes to grasp the extension pin at the position on the way down, and opens to eject the extension pin at the lower end stroke position. Extension pin holding and ejecting mechanism for electronic component insertion equipment. 2. The pin holder (11) is made of a pipe having an inner diameter large enough to allow the extension pin (3) to fall smoothly, and has at least two opposing vertical slits (
12), and the opening/closing part is formed by elastically deformable holder pieces (13) of the pipe separated by these slits. 3. A protrusion (14) is provided on the outside of the holder piece (13) of the pin holder (11), and the clinch unit (10)
The vertical guide hole (1) that guides the pin holder (11)
5), and the guide hole is provided with grooves (16, 17) into which the protrusions fit at the upper and lower stroke positions of the pin holder, and when the protrusions fit into these grooves, the opening/closing part of the holder piece is opened. Claim 2, wherein the opening and closing portion is closed while the projection is in contact with the inner wall of the guide hole (15).
Mechanism described in. 4. A plurality of pin holders (11) are arranged in parallel according to the number of lead wires of the electronic component (1), and the lower end of each pin holder is connected to a piece (20) connected to a drive mechanism, so that a plurality of pin holders can be operated simultaneously. 2. A mechanism according to claim 1, which is moved up and down. 5. Each pin holder (11a, 11b, 11c) is located between the pin holders and between the structural parts (21, 25) of the bridge (20).
5. The mechanism according to claim 4, wherein the mechanism is coupled with a cushion rubber (27) interposed between the two.