JPH033956B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a printed circuit board in which terminals to be attached to the side edges of the printed circuit board are formed with lead wires, and the lead wires are inserted and fixed into a pair of holes formed in the printed circuit board. The present invention relates to a terminal mounting device.

Conventional structure and its problems Conventionally, when printed circuit boards are fixed to each other by soldering or the like, an F-shaped pin with two protrusions extending in the radial direction is formed at the end of the printed circuit board. Insert it into a pair of holes and solder it.
A printed circuit board with terminals is used. but,
This F-shaped pin is expensive because it needs to be specially formed, and it also has the disadvantage of poor productivity due to the labor involved in inserting the pin into the hole.

OBJECT OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and is capable of reducing material costs and improving productivity by inserting lead wires into the pair of holes and then bending and fixing them. The object of the present invention is to provide a device for attaching terminals to a printed circuit board.

Structure of the Invention In order to achieve the above object, the present invention includes a table having an opening in the center and being movable in the vertical and horizontal directions in a horizontal plane;
a holding device that holds the printed circuit board at the opening position; a cutting device that is provided above the table and cuts the fed wire into a certain length; and a cutting device that is provided above the table so as to be movable up and down. a wire bending and inserting device that bends the cut wire into an inverted U-shape when descending and inserts both legs of the bent wire into a pair of holes formed in the printed circuit board; an anvil device disposed vertically movably facing the wire bending/insertion device in the lower part; and a clinch device for fixing the wire to the printed circuit board by pushing the two legs apart along the lower surface of the printed circuit board, and protruding the tip of one leg outward from the side edge of the printed circuit board. This is what I did.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a horizontal guide rail 2 is provided on the base 1 in the horizontal lateral direction (left and right direction), and a vertical guide rail 2 in the horizontal lateral direction (perpendicular to the paper surface) is provided on the base 1. Lateral moving table 4 with rails 3 on the top surface
is engaged. Furthermore, a table 5 is engaged with the vertical guide rail 3. As a result, the table 5 is movable vertically and horizontally within a horizontal plane. An opening 6 is formed in the center of the table 5.
A holding device 8 for holding the printed circuit board 7 in a horizontal direction is provided at the position.

Above the table 5 is a wire drum support 9.
A wire feeding device 11 is provided that feeds out the wire 10 attached to the wire 10 by a certain length. That is,
This wire feeding device 11 includes a slide rail 13 horizontally attached to a support frame 12 extending from a base 1, a moving part 14 movably fitted to this slide rail 13, and one end attached to this moving part 14. It has a clip 16 which is pivotally attached and whose other end is pulled by a spring 15, and a rod 17 connected to the moving part 14. axis 18
It is moved back and forth by a cam (not shown) attached to. When the moving part 14 is pushed forward (to the left in FIG. 1), the tip of the clip 16 touches the wire 10.
It bites into the wire and lets it out for a certain length, but when it is pulled backwards, the tip slides over the wire 10 and does not move the wire 10. Note that a wire 10 is connected between the wire drum support 9 and the wire feeding device 11 by a structure similar to that of the clip 16.
It is desirable to provide a wire stop device 19 to prevent rearward movement (to the right in FIG. 1) of the wire.

In front of the wire feeding device 11 and above the table 5, there is a cutting device 20 that cuts the fed wire 10 into a certain length, and a cut wire 1.
A pair of holes 21A and 21B are formed at the end of the printed circuit board 7 by bending 0 into an inverted U shape.
A wire bending and insertion device 22 is provided for insertion into the wire (see FIGS. 2 and 3).

In the bending/inserting device 22, 23 is a guide tube extending vertically and rotatably attached to the support frame 12, 24 is a slide tube that can slide on this guide tube 23 in the axial direction, and 25 is this slide tube. 2
4 is an insert plunger that can be slid in the axial direction. The guide tube 23 and the slide tube 24 are prevented from rotating relative to each other by a key 26. Further, as shown in FIGS. 2 to 4 and 6, the lower end portion 27 of the insert plunger 25 has a rectangular cross section, and this lower end portion 27 is attached to a fork fixed to the lower end of the slide tube 24. Since the sliding tube 24 and the insert plunger 25 are slidably fitted into the mixing tool 28,
They are said to be unable to rotate relative to each other. Note that the lower end portion 27
A vertical guide groove 29 that can be engaged with the cut wire 10 is formed on the inner surface of the forming tool 28 facing the side surface. Furthermore, a horizontal guide groove 30 continuous to the guide groove 29 is also formed on the lower surface of the forming tool 28 .

At the upper end of the slide tube 24, this slide tube 2
A support 31 rotatably fitted to the outside of the holder 4 is attached. Further, a universal joint 32 is attached to the upper end of the insert plunger 25 and is rotatable with respect to the insert plunger 25. Arms 33 and 34 are connected to the support 31 and the universal joint 32, respectively, and are pivoted up and down by cams (not shown) fixed to the drive shaft 18. It is configured to be movable.

As shown in FIGS. 2 to 4, a lower large-diameter portion 35 with a larger inner diameter is formed at the lower part of the guide tube 23, and a large-diameter portion 35 formed at the lower portion of the slide tube 24 is formed in the lower large-diameter portion 35. The portion 36 is configured to be fitable. The above-mentioned forming tool 28 is fixed to the lower end of the slide tube 24. The lower edge of the forming tool 28 and the cutter die 37 disposed in front of the wire feeding device 11,
The above-described cutting device 20 is configured to cut the wire 10, and when the forming tool 28 is lowered, the wire 10 is cut.

As shown in FIG. 4, inside the large diameter portion 35 at the lower end of the guide tube 23, an inside former 39 that can swing around a shaft 38 is disposed. A cam roller 40 is disposed at the upper end of the inside former 39 and comes into contact with the side peripheral outer wall of the large diameter portion 36 of the slide tube 24 . A spring 41 presses and biases the cam roller 40 together with the inside former 39. On the other hand, the lower tip 42 of the inside former 39 has a rectangular cross section, and the forming tool 2
It extends horizontally to the bottom of 8. Therefore, when the slide tube 24 descends to a predetermined position,
The cam roller 40 moves from the large diameter portion 36 to the small diameter portion 43, that is, inward, and the lower tip portion 4
2 will be moved outward from below the forming tool 28.

As shown in detail in FIG. 2, the upper part 45 of the guide tube 44 is slidably fitted into a vertical guide hole 46 provided at the bottom of the guide tube 23, and
This is a guide member urged upward by a spring 47. Reference numeral 48 denotes a stopper projecting from the guide member 44, and is configured to abut on the lower end surface 49 of the guide tube 23 and also on the lower end surface 50 of the slide tube 24. The lower tip 51 of the guide member 44 is located further below the lower tip 42 of the inside former 39, and has a guide hole 52 into which the insert plunger 25 can be inserted after passing through the forming tool 28. It is set up. A guide groove 53 that can be connected to the guide groove 29 of the forming tool 28 is also formed on the inner surface of the guide hole 52 .

As shown in FIG. 1, an anvil device 54 is provided below the table 5. This anvil device 54 includes an anvil tube 55 fixed to the base 1.
A middle cylinder 57 is fitted into the anvil cylinder 55 so as to be vertically movable, and a pinion 56 is formed on the outer periphery. A clinch device 58 is disposed at the upper end of the middle cylinder 57. It has a plunger 59 that is freely fitted inside. 60 is drive shaft 1
The free end 61 is connected to the lower end of the plunger 59. A spring 62 is fitted around the plunger 59, and the upper end of the spring 62 abuts the lower end of the middle cylinder 57, so that the middle cylinder 57 is also interlocked with the arm 60. Reference numeral 63 denotes a stopper that is engaged with the lower end of the anvil tube 55 to limit the rise of the middle tube 57 to a certain height.

The clinch device 58 will be explained in detail with reference to FIGS. 2-4. The upper end portion 64 of the middle cylinder 57 is formed to have a large diameter, and a pair of clinch tools 66 that are biased toward each other by a spring 65 are disposed inside the upper end portion 64 . This clinch tool 66 is configured to approach directly near the lower surface of the printed circuit board 7 when the middle cylinder 57 is raised to the locking position as described above. Further, at the upper end of the plunger 59, a middle cylinder 5 is provided.
7 is stopped, a wedge portion 67 that can be inserted between the clinch tools 66 is formed by the rise of only the plunger 59, so that the two clinch tools 66 can be moved apart from each other in the horizontal direction. It is composed of

As shown in FIGS. 1 and 6, the guide tube 2
A gear 68 is integrally formed on the upper outer periphery of 3. Reference numeral 69 denotes a fan-shaped gear with missing teeth that meshes with this gear 68, and is made swingable by a rod 70. That is, the wire bending and inserting device 22 can be integrally moved 90 degrees around the axis from the illustrated state to the illustrated state.
It is configured so that it can be switched to a rotated state. The above rod 70 is the L-shaped lever 7
1, and this L-shaped lever 71
An air cylinder 72 attached to the support frame 12 is connected to the support frame 12 . The L-shaped lever 71 tip roller 73 is configured to be able to come into contact with a cam 74 fixed to the drive shaft 18, but normally the air cylinder 7
The second rod 75 is in the "out" state, and the roller 73 is set to have a slight clearance from the top diamond (maximum radius part) of the cam 74. Therefore, the guide tube 23 is normally maintained in the illustrated state without rotating.

Further, as shown in FIGS. 1 and 7, a rack 77 that is reciprocated by an air cylinder 76 attached to the base 1 is engaged with the pinion 56 of the middle cylinder 57 of the anvil device 54. That is, the anvil device 54 is also configured to be rotatable 90 degrees around the axis from the illustrated state.

The operation of the above configuration will be explained below. Note that FIG. 8 is a timing chart showing the amount of rotation of the drive shaft 18 and the movement of each part.

First, the printed circuit board 7 is held by the holding device 8, and the table 5 is moved automatically or manually so that the holes 21A and 21B are directly below the bending and inserting device 22.

When the drive shaft 18 rotates and the wire feeding device 11 first feeds out only a certain length of wire 10 as shown in FIG. 2, the slide tube 24 descends and the wire 10 is cut by the cutting device 20. . The cut wire 10 is bent into an inverted U-shape by the forming tool 28 and the lower end portion 42 of the inside former 39 while being engaged with the guide groove 30 (hereinafter referred to as a U-shaped wire). 78) is engaged in the guide groove 29 as shown in FIG. 3a. As shown in FIG. 2, the wire 10 is fed out far beyond the lower end 42 of the inside former 39, and the wire 78 is bent.
The leg 79A facing the hole 21A near the side end of the printed circuit board 7 is longer than the other leg 79B.

When the forming tool 28 descends to a predetermined position, the inside former 39 retreats outward as described above. Then, the lower tip 51 of the guide member 14 is pushed by the forming tool 28, and both descend together to approach the printed circuit board 7, as shown in FIG. 3b. At the same time, the lower end 27 of the insert plunger 25 descends and the guide groove 29
The U-shaped wire 78 that was engaged with the guide member 44 is now engaged with the guide groove 53 of the lower tip 51 of the guide member 44 . Also, at this time, the anvil device 5
The middle cylinder 57 and plunger 59 of 4 have been raised, and the clinch tool 66 has come close to the bottom surface of the printed circuit board 7.

When the lower end 27 of the insert plunger 25 further descends, the U-shaped wire 78 comes into contact with the printed circuit board 7, as shown in FIG. The clinch tool 66 is projected from the lower surface of the clinch tool 7 . Thereafter, as shown in FIG. 3d, when the plunger 59 of the anvil device 54 is raised, the clinch tools 66 are moved away from each other.
The legs 79A, 79B are then pushed apart along the lower surface of the printed circuit board 7, and the U-shaped wire 78 is fixed to the printed circuit board 7. At this time, the tips of the leg portions 79A are projected outward from the side edges of the printed circuit board 7, and function as terminals. Further, while the clinch tool 66 pushes and spreads the U-shaped wire 78, the lower end portion 27 of the insert plunger 25 maintains the state in which the wire 78 is pressed.

Thereafter, the plunger 59 and the middle cylinder 57 are lowered, and the slide cylinder 24 and the insert plunger 25 are raised. Note that the wire feeding device 11
After the wire 10 is fed out forward, it may be returned to the rear by the end of one cycle.

When the above operations are completed, the table is moved again so that the other pair of holes 21A and 21B of the printed circuit board 7 are directly below the bending and inserting device 22, and the above operations are repeated.

Note that the pair of holes 21A and 21B are not formed on the left and right sides (in the direction along the plane of the paper) as shown in Fig. 2, but are formed at positions rotated 90 degrees (in the direction perpendicular to the plane of the paper in Fig. 2) If so, the air cylinder 72 is operated to bring the roller of the L-shaped lever 71 into contact with the cam 73. Then, based on the shape of the cam 73, after the wire 10 is cut, the bending and insertion device 22 is rotated 90 degrees while descending, and the U-shaped wire 78 is properly inserted into the holes 21A and 21B. will be done. In this case, the air cylinder 76 is operated at the same time as the air cylinder 72, and the anvil device 54 is also rotated 90 degrees.

When the slide tube 24 and the insert plunger 25 are subsequently raised, the bending and insertion device 22 is rotated 90 degrees in the opposite direction based on the shape of the cam 74, returns to its original position, and returns to its original position. wire 10
Prepared for cutting. Note that the anvil device 54
need only maintain the same state until the direction of the holes 21A, 21B changes again, and the other holes 21A,
There is no need to rotate the U-shaped wire 78 when inserting it into 21B.

Effects of the Invention As described above, according to the present invention, the wire that is continuously fed out can be cut and bent, and inserted into and fixed to the printed circuit board, so that the printed circuit board with terminals can not only be manufactured at low cost, but also Since the wire is automatically inserted, the conventional method of inserting an F-shaped pin can be eliminated, and productivity can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a front view showing the overall structure, FIG. 2 is an enlarged view of the main part of FIG. 1, FIGS. The figure is a side view of Fig. 2, Fig. 5 is a sectional view of Fig. 4, Fig. 6 is a sectional view of Fig. 1, Fig. 7 is a sectional view of Fig. 1, and Fig. 8 is a drive section. FIG. 4 is a timing chart showing the amount of rotation of the shaft and the movement of each part. 5... Table, 6... Opening, 7... Printed circuit board, 8... Holding device, 10... Wire, 20
... Cutting device, 21A, 21B ... Hole, 22 ...
Wire bending and insertion device, 54... Anvil device, 5
8...Clinch device, 78...U-shaped wire, 7
9A, 79B... Legs.

Claims (1)

[Claims] 1. A table having an opening in the center and being movable vertically and horizontally within a plane, a holding device for holding a printed circuit board at the opening position, and a holding device provided above the table for transport. A cutting device that cuts the supplied wire to a certain length is provided above the table so as to be movable up and down, and when it is lowered, it cuts the cut wire into an inverted U.
a wire bending and inserting device that bends the wire into a letter shape and inserts both legs of the bent wire into a pair of holes formed in the printed circuit board; an anvil device disposed to be movable up and down; and an anvil device disposed on the top of the anvil device, with both legs inserted into the printed circuit board and protruding from the bottom surface of the printed circuit board along the bottom surface of the printed circuit board. 1. An apparatus for attaching a terminal to a printed circuit board, comprising: a clinch device for fixing the wire to the printed circuit board by pushing the wires apart and protruding the tip of one of the legs to the outside of the side edge of the printed circuit board.