JPH09245930A - Wire material moulding and inserting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire material moulding and inserting device in which a resin bobbin is not damaged, and in which installation property to a board or the like is excellent in forming a lead terminal on the bobbin for an electronic part. SOLUTION: A wire material 1 is moulding-worked by a primary moulding punch 4 to be held, it is then moulding-worked by a secondary moulding punch 13 at a position of 90deg., rotated from above, and the wire material 1 is then fitted into an insertion hole in a bobbin 2 by the secondary moulding punch 13. The bobbin 2 is horizontally moved to cut a moulding-worked part of the wire material 1 by shearing force by a wire material guide 25 and a plate 26, thereby a high-quality lead terminal is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rod forming and inserting apparatus for forming a lead terminal by forming and inserting a wire rod into a bobbin for coil parts.

[0002]

2. Description of the Related Art Generally, when forming a lead terminal by inserting a wire into a bobbin for coil parts, etc., after press-fitting a wire that has been subjected to surface pressing processing into a bobbin to prevent it from coming off,
A guide of the wire rod is slid in a direction perpendicular to the wire rod to cut the wire rod to form a lead terminal.

A conventional wire forming / inserting device will be described below with reference to the drawings. 5 (a) and 5 (b) are partial cross-sectional views of the main part of the conventional wire rod forming and inserting device, and FIG. 6 is a cross-sectional view of the main part of the same wire rod cut.

Reference numeral 51 is a wire rod made of a metal material, 52 is a bobbin made of a resin material having a prescribed number of insertion holes 58 for the wire rods 51 at one end surface thereof, and 53 and 54 are molding press-fitting blocks which are pressed against the surface of the molding press-fitting block. By moving in the direction of arrow B, the wire 5 is inserted into the insertion hole 58 of the bobbin 52 through the hole of the guide 56.
1 is press-fitted.

At this time, the bobbin 52 is pressed and abutted against the fixed guide 55 by the backup 57. After press-fitting the wire rod 51 into the insertion hole 58 of the bobbin 52, the guide 56 moves the wire rod 5
Wire rod 5 by sliding in the direction of arrow B with respect to 1
1 is cut to form a lead terminal 59.

The bobbin 52 with the lead terminals 59 is completed by press-fitting the wire rod 51 into the bobbin 52 and cutting it into a predetermined length by using the wire rod forming / inserting device having the above-mentioned structure.

[0007]

In the above-mentioned conventional configuration,
As shown in FIG. 6, the cut surface 60 of the wire 51 cut is flat and is accompanied by burrs 61. Therefore, the tip of the wire rod 51 having such a cut surface 60 is attached to the bobbin 52.
When press-fitting into the insertion hole 58 of the bobbin 52,
8 is difficult to enter, and the bobbin 52 is easily cracked or broken.

It is an object of the present invention to solve the above-mentioned problems and to provide a wire rod forming and inserting apparatus which is free from cracks or cracks on a bobbin and which is excellent in mountability on a substrate or the like. .

[0009]

In order to solve the above-mentioned problems, the present invention is a primary process for forming a V-shaped groove by sandwiching a wire rod at a specified position in a direction perpendicular to the longitudinal direction of the wire rod. The forming punch and the primary forming punch are rotated by 90 degrees in a direction perpendicular to the longitudinal direction of the forming wire at a position separated from the position of the primary forming punch along the wire by an integral multiple of the length of the wire to be press-fitted. V by pinching at the position
A secondary forming punch that is capable of forming a groove in a groove and moving in the longitudinal direction along the wire by the length of the wire to be press-fitted,
A wire rod guide that has a hole slightly larger than the wire diameter of the wire rod that is inserted therethrough and a positioning jig that holds a fixed distance from the wire rod guide and holds the bobbin fixedly are used. This is a wire rod forming and inserting device that inserts the wire rod guide into the bobbin insertion hole in the positioning jig while the next forming punch holds the wire rod. Cracks are less likely to occur, and mounting on a substrate or the like becomes extremely good.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION According to the first aspect of the present invention, a V-shaped groove is formed in a wire rod by holding the wire rod at a predetermined position in a direction perpendicular to the longitudinal direction of the wire rod. The primary forming punch and the primary forming punch at a position spaced apart from the position of the primary forming punch along the wire by an integer multiple of the length of the wire to be press-fitted are in a direction perpendicular to the longitudinal direction of the wire and the primary forming punch. V by pinching at the rotated position
A secondary forming punch that is capable of forming a groove in a groove and moving in the longitudinal direction along the wire by the length of the wire to be press-fitted,
A wire rod guide that has a hole slightly larger than the wire diameter of the wire rod that is inserted therethrough and a positioning jig that holds a fixed distance from the wire rod guide and holds the bobbin fixedly are used. This is a wire rod forming and inserting device that inserts the wire rod guide into the bobbin insertion hole in the positioning jig while the wire rod is clamped by the next forming punch.The wire rod can be smoothly pressed into the bobbin at regular intervals. Has the effect of.

According to the second aspect of the present invention, the positioning jig for fixing and holding the primary forming punch, the secondary forming punch, the wire rod guide, and the bobbin relatively moves in the direction perpendicular to the wire rod, and is press-fitted. The wire rod forming / inserting device according to claim 1, wherein the formed wire rod is cut at a position where the wire rod is formed, and the shearing force is concentrated on the formed portion of the wire rod to cut this portion. Have.

The invention according to claim 3 of the present invention is the wire rod forming and inserting device according to claim 1, wherein a cutter for cutting the wire rod is provided at the outlet of the wire rod guide. Has the effect of cutting into specified dimensions.

The invention according to claim 4 of the present invention is provided with a surface pressing mechanism for thickening the wire diameter by sandwiching the wire rod for preventing the wire rod from pulling out in the primary molding punch or the secondary molding punch. According to the first aspect of the present invention, there is provided a wire rod forming / inserting device, which has an effect of making it difficult for a wire rod to be pulled out after press fitting.

The invention according to claim 5 of the present invention is provided with a surface pressing punch for thickening the wire diameter by sandwiching the wire material in the wire material before or after the primary molding for preventing the wire material from coming off. According to the first aspect of the present invention, there is provided a wire rod forming / inserting device, which has an effect of making it difficult for a wire rod to be pulled out after press fitting.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a main part of a wire rod forming / inserting device according to an embodiment of the present invention, FIG. 2 is a partial side view of a positioning jig that holds the bobbin, and FIG. 3 is a schematic explanatory view of the same operating process. 4 is a perspective view of the forming punch and the forming wire rod.

Reference numeral 1 denotes a wire rod, which is a circular cross-section structure and is made of a copper alloy or an iron material having a plated surface, and 2 is a bobbin made of an insulating resin material. A specified number of insertion holes 39 having substantially the same diameter are provided. 3
Is a surface-pressing punch that performs surface-press forming at a prescribed location of the pair of wire rods 1, and is fixed to the lower inside of the pair of primary-forming punches 4 that form a V-shaped groove at the prescribed location of the wire rod 1. .

The pair of primary molding punches 4 are fixed to one end of a pair of levers 5, and the pair of levers 5 are rotatably held by a block 9 at a central portion via a fulcrum pin 6.
The rotation of the cam 8 causes the primary forming punch 4 to sandwich the wire rod 1 in a direction perpendicular to the longitudinal direction of the wire rod 1 via a pair of cam followers 7. The cam 8 is rotated by a certain angle by an air cylinder 11 via a shaft 27 penetrating the inside of the block 9 and a lever 10.

A spring 1 mounted between a pair of levers 5.
2, the cam follower 7 attached to the lever 5 is pressed against the outer peripheral surface of the cam 8 to be brought into contact therewith. A pair of secondary molding punches 13 is fixed to the tip of the pair of levers 14 similarly to the pair of primary molding punches 4, and has a fulcrum pin 15, a pair of cam followers 17, and a cam 16 provided at the center. ,
The block 18, the shaft 19, the lever 20, and the air cylinder 22 hold the wire 1.

At this time, the pair of secondary forming punches 13 are clamped at a position rotated by 90 degrees with the primary forming punch 4 and perpendicularly to the longitudinal direction of the wire 1 to form a V-shaped groove. It has become.

Reference numeral 21 denotes a bracket, which fixes one end of the air cylinder 22 to one end of the block 18. The block 18 is fixed to the movable part of the slide rail unit 23, and the wire rod 1 is driven by the air cylinder 24.
It is possible to move the wire 1 in parallel with
Insertion hole 39 of bobbin 2 while being sandwiched by the next forming punch 13.
It is possible to press the tip of the wire rod 1 into the insertion hole 39 of the bobbin 2 by moving the wire rod 1 in the depth direction.

Reference numeral 25 is a wire rod guide, which guides the wire rod 1 in the press-fitting direction by inserting the wire rod 1 and prevents the wire rod 1 from buckling at the molding points formed by the primary molding punch 4 and the secondary molding punch 13. .

Reference numeral 26 denotes a plate, which is provided with holes at the same pitch and at the same position as the bobbin 2 and is fixed to one end of the frame 30. The bobbin 2 is pressed against the plate 26 by an air cylinder 28 attached to a frame 30 via a backup 33 movable by a slide rail unit 29.

The frame 30 is fixed by a bracket 31 to an XY table 32 which is movable in the X or Y direction. Plate 26 and XY table 32
Is set so as to be parallel to the wire rod guide 25, the bobbin 2 is driven by driving the XY table 32.
The positioning jig 34, which is a unit that holds the wire, can linearly move in a direction perpendicular to the longitudinal direction of the wire rod 1.

Therefore, by intermittently moving the position of the insertion hole 39 of the bobbin 2 to the tip position of the wire rod 1,
Each wire rod 1 can be press-fitted, and a plurality of lead terminals 3
8 is formed, and the thickness of the plate 26 is formed so that the constricted part of the shape of the wire rod 1 that has been press-fitted and formed by abutting the vertices of two cones is substantially in the center of the gap between the wire rod guide 25 and the plate 26. Is set,
By driving the XY table 32, the positioning jig 34 holding the bobbin 2 is moved in a straight line direction perpendicular to the longitudinal direction of the wire rod 1, whereby a shearing force is applied to the wire rod 1 in the gap. As a result, the constricted portion of the wire rod 1 is sheared in the direction perpendicular to the longitudinal direction of the wire rod 1 and can be cut.

Next, the operation will be described. FIG. 3 is a partially simplified plan view of this wire rod forming and inserting device, which is actually installed at a position rotated by 90 degrees from each other. The forming punch 13 is shown so as to sandwich the wire rod 1 in the same direction.

FIG. 3A shows a state in which the tip of the wire rod 1 is press-fitted into the insertion hole 39 of the bobbin 2. At this time, the primary molding punch 4 is in an open state and the secondary molding punch 13 is in the wire rod 1. Is clamped, molded, and held. Next Figure 3
(B) shows a state in which the bobbin 2 has moved to the position of the next insertion hole 39 together with the positioning jig 34 with the primary molding punch 4 and the secondary molding punch 13 in the same state as described above.
The tip of the wire 1 is cut by sliding the wire guide 25 and the plate 26 to form the lead terminal 41.

Next, FIG. 3 (c) shows a state in which the primary forming punch 4 holds the wire rod 1 for forming, and then the secondary forming punch 13 is opened. Next, FIG. 3D shows a state in which the opened secondary forming punch 13 has moved to the side of the primary forming punch 4 by the length of the wire rod 1 into which the press-fitting is performed. The next figure 3 (e) is 2
The primary forming punch 4 is in an open state after the wire rod 1 is sandwiched by the secondary forming punch 13, and at this time, the portion of the wire rod 1 formed by the primary forming punch 4 is formed by the secondary forming punch 13. By processing, the wire rod 1 becomes a shape having a constriction 35 as shown in FIG. In addition, 36 is a surface pressing part and 37 is a cutting part.

After that, the secondary forming punch 13 moves in the direction of the arrow while holding the wire rod 1 and presses the wire rod 1 into the next insertion hole 39 of the bobbin 2 to return to the state of FIG. 3 (a).

By repeating the above series of operations, the tip of the wire 1 can be press-fitted into the insertion hole 39 of the bobbin 2 to form a plurality of lead terminals 38.

Although the air cylinder is used as a driving force for forming and press-fitting the wire rod 1, a motor drive and a cam mechanism may be used for higher speed.

Further, as the forming process of the wire rod 1, the shape in which the vertices of two cones are abutted with each other has been described. It is not particularly limited as long as it has good sex. At this time, in some cases, the primary molding is not necessary, and it is possible to perform the secondary molding only and press-fit. In this case, the mechanism can be made simpler.

Also, the method of press-fitting the wire 1 has been described, but simple insertion is also effective, and
In the present invention, the wire rod 1 is moved obliquely upward from the bottom to be press-fitted. However, this is such that dust and the like enter the bobbin 2 and the plating scraps and the like of the wire rod 1 drop onto the press-fitting mechanism and adhere. This is for preventing the above, and the direction is not particularly limited as long as the effects of the present invention can be obtained.

[0033]

As described above, according to the present invention, since the wire rod has a shape close to a cone, it can be easily inserted into the insertion hole of the bobbin when press-fitted into the insertion hole of the bobbin, and the bobbin is not cracked or broken. It gets harder.

Further, even when the bobbin having the lead terminals is mounted on a substrate or the like, the effect of having extremely good mountability can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a wire rod forming and inserting apparatus according to an embodiment of the present invention.

FIG. 2 is a partial side view of a positioning jig that holds the bobbin.

3A to 3E are schematic explanatory views of the same operation process.

FIG. 4 is a perspective view of the molding punch and the molded wire rod.

5A and 5B are partial cross-sectional views of a main part of a conventional wire rod forming and inserting device.

FIG. 6 is a sectional view of the main part of the same wire cut

[Explanation of symbols]

 1 Wire Rod 2 Bobbin 3 Face Push Punch 4 Primary Forming Punch 5 Lever 6 Support Point Pin 7 Cam Follower 8 Cam 9 Block 10 Lever 11 Air Cylinder 12 Spring 13 Secondary Forming Punch 14 Lever 15 Support Point Pin 16 Cam 17 Cam Follower 18 Block 19 Shaft 20 Lever 21 Bracket 22 Air cylinder 23 Slide rail unit 24 Air cylinder 25 Wire rod guide 26 Plate 27 Shaft 28 Air cylinder 29 Slide rail unit 30 Frame 31 Bracket 32 XY table 33 Backup 34 Positioning jig 35 Constriction 36 Face pushing part 37 cutting part 38 lead terminal 39 insertion hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihisa Maebata 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A primary forming punch for forming a V-shaped groove in a wire rod by sandwiching the wire rod at a predetermined position in a direction perpendicular to the longitudinal direction of the wire rod, and the first forming punch along the wire rod.
V-shaped by sandwiching at a position separated from the position of the next forming punch by an integer multiple of the length of the wire to be press-fitted in a direction perpendicular to the longitudinal direction of the wire and at a position rotated by 90 degrees with the primary forming punch. A secondary forming punch capable of forming a groove and moving in the longitudinal direction along the wire by the length of the wire to be press-fitted, a wire guide having a hole slightly larger than the wire diameter of the wire through which the wire is inserted, and the wire. It is composed of a guide and a positioning jig that holds the bobbin at a fixed interval and holds the bobbin fixedly. The wire rod guide is inserted into the positioning jig while the secondary molding punch holds the wire rod. Wire rod forming and inserting device press-fitted into the bobbin insertion hole. 2. A primary molding punch, a secondary molding punch, a wire rod guide, and a positioning jig that holds the bobbin fixedly move relatively to the wire rod in a direction perpendicular to the wire rod to a position where the wire rod press-fitted is formed. The wire rod forming / inserting device according to claim 1, which is cut by cutting. 3. The wire rod forming / inserting device according to claim 1, wherein a cutter for cutting the wire rod is provided at an outlet of the wire rod guide. 4. The wire rod forming insert according to claim 1, further comprising a surface pressing mechanism for thickening the wire diameter by sandwiching the wire rod for preventing the wire rod from coming off in the primary molding punch or the secondary molding punch. apparatus. 5. The wire rod insert according to claim 1, further comprising a surface-pushing punch for increasing the diameter of the wire rod by sandwiching the wire rod between the wire rods before or after the primary molding for preventing the wire rod from coming off. apparatus.