GB2098521A

GB2098521A - Lead wire winding device

Info

Publication number: GB2098521A
Application number: GB8209397A
Authority: GB
Original assignee: Toko Inc
Current assignee: Toko Inc
Priority date: 1981-04-02
Filing date: 1982-03-31
Publication date: 1982-11-24
Also published as: KR880001387B1; KR830009603A; JPS57164513A; GB2098521B; HK82085A; JPH0355965B2

Abstract

A device for winding the lead wires 6 of circuit elements such as capacitors 5 around the base plates 2 of electronic components such as intermediate-frequency transformers or pulse transformers 1 has a rotatable holder 9 for one of the electric components having terminal pins 3 on its base plates, a lead wire moving mechanism movable 12 upwardly and downwardly around the electric component on the holder, with a 13 clip gripping one of the lead wires, and a clip operating mechanism for closing and opening the clip, whereby efficient and automatic winding operation becomes possible by interrelated movement of the mechanism 12 and holder 9. <IMAGE>

Description

SPECIFICATION Lead wire winding device BACKGROUND OF THE INVENTION This invention relates to a device for winding the lead wires of an electrical circuit element such as a capacitor on the base plate, having terminal pins, of an electronic component such as an inter mediate-frequency transformer or a pulse transformer.

Each of such transformers normally has a rectangular base with a plurality of terminal pins embedded in its upper surface and a bobbin fixed to its lower surface and supporting fine conductor wire wound there-around. The base plate has a recess for receiving a circuit element such as a capacitor in the upper surface. To the two ends of the capacitor in the shape of a small cylinder are connected two lead wires to be wound on the root portions of two different terminal pins, respectively. The lead wires are once led, through holes formed in the base plate, toward the lower surface to which the bobbin case is fixed and then are turned back toward the terminal pins along the side face of the base to be wound on the root portions of the terminal pins.

After the lead wires are wound on the terminal pins, the loose end portions of the lead wires left without being wound thereon are cut off.

Such a series of winding operation steps are conventionally performed by hand, using tweezers or small pincers. Accordingly, special skill for winding the lead wire around the base plate is required. Furthermore, it is difficult to produce hand-made products such as transformers with uniform quality.

SUMMARY OF THE INVENTION According to this invention there is provided a device for winding the lead wires of circuit elements which device can automatically and rapidly wind lead wires around the base plates of electronic components such as intermediatefrequency transformers and pulse transformers.

According to this invention, more specifically, there is provided a device for winding the lead wires of a circuit element around the base plate of an electronic component comprising: a rotatable holder (9) for holding an electronic component (1) having a base plate (2) on which terminal pins (3) are embedded; a lead wire moving mechanism (12) movable upwardly and downwardly between lower and upper positions around the electric component (1) and having a clip (13) for releasably gripping one of the lead wires (6,6) during a winding operation, which clip (13) is biased by at least an elastic member and can move to and away from the electric component (1) during the winding operation; and a clip operating mechanism (14) for closing and opening the clip (13) in response to the movement of the lead wire moving mechanism (12), the holder (9) and lead wire moving mechanism (12) being operated interrelatedly with each other.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings: FIG. 3 is a perspective view showing an intermediate-frequency transformer, including a capacitor to be fixed thereto; FIG. 2 is a plan view showing the transformer with the capacitor fixed thereto and two lead wires of the capacitor wound around the base plate of the transformer; FIG. 3 is a perspective view showing essential parts of one example of the winding device according to this invention for winding the lead wires of a circuit element to be fixed to an electronic component with a lead wire moving mechanism in lowered state; FIG. 4 through 11 are fragmentary perspective views showing the positional relation between a clip and a holder according to progressive steps in the winding operation of the device of the present invention, FIG. 4 showing a state in which the clip is in a lower position.FIG. 5 showing a state in which the clip is in a horizontal position, FIG. 6 showing a state in which the holder is rotated in the direction of an arrow A with the clip gripping the lead wire in the horizontal position, FIG. 7 showing a state in which the clip is in an upper position, FIG. 8 indicating a state in which the holder is turned in the direction of an arrow B with the clip gripping the lead wire in its upper position, FIG. 9 showing a state in which the clip is returned to the horizontal position while gripping the lead wire, FIG. 10 showing a state in which the holder is turned in the direction of the arrow A opposite to that of FIG. 8 with the clip gripping the lead wire, and FIG. 11 showing a state in which the clip is lowered to the original position, while releasing the lead wire;; FIG. 12 is a partial perspective view of the winding device of the present invention with the clip placed in the horizontal position just before it releases the lead wire in cooperation with a clip operating mechanism; FIG. 13 (a) is a diagrammatic view showing the operation of the clip operating mechanism when the clip is lowered; and FIG. 13 (b) is a diagrammatic view showing the operation of the clip operating mechanism when the clip is raised.

DETAILED DESCRIPTION OF THE INVENTION Referring first to FIGS. 1 and 2, an intermediate frequency transformer 1 as an electronic component for television or other electrical circuits has a base plate 2 with a plurality of terminal pins 3 on its upper surface and a bobbin fixed to its lower surface on which a coil (not shown) is wound. In the upper surface of the base plate 2 is formed a recess 2a for receiving a capacitors 5 having two lead wires 6,6 at its two ends. Two holes 2b, 2b are formed in the base plate 2 to extend from the bottom of the recess 2a toward the lower surface of the base plate 2, through which holes the two lead wires pass downwardly when the capacitor 5 is accommodated in the recess 2a.

In three side faces except that on the side of the recess 2a are formed a number of guide grooves 2c, 2c .... 2c for guiding the lead wires 6,6 and other lead wires (not shown) of the coil on the bobbin 4. The lead wires 6,6 extending downwardly through the holes 2b, 2b are respectively led along and in the grooves 2c to the root portions of two terminal pins 3,3 disposed diagonally as shown in FIG. 2. After the lead wires 6 are led to their respective pin root portions, they are wound therearound by a winding apparatus which is not directly related to this invention.

A device for winding the lead wires according to this invention functions to lead the wires 6,6 from the lower surface of the base plate 2 to the terminal pins on its upper surface along the grooves 2c in the side faces thereof.

In FIG. 3, the device M of this invention comprises an index table 7 rotating intermittently in steps of a specific angle each in a horizontal plane and having a plurality of arms 8 projecting radially from its circumference at appropriate intervals, a rotating holder 9 supported rotatably at the outer end of each arm 8 and detachably holding the transformer 2, a holder driving mechanism 10 for rotating the holder 9 via a clutch means 11, a lead wire moving mechanism 12, having a clip 13, for moving the lead wire 6 vertically with the clip 13 gripping the end thereof hung from the base plate 2 of the transformer 1, and a clip operating mechanism 14 for closing and opening the clip 13 for gripping and releasing action, only a part of which is shown in FIG. 3 and the remaining part of which is shown in FIG. 14.

At the upper end of the holder 9 is provided a separator 15 having a pair of separating grooves 1 5a, 1 5a which are formed at its side facing radially outward in order to guide the lead wires 6,6 downwardly and outwardly so that the end of one of the lead wires 6,6 can be placed in a position where the clip 13 can grip it. A chuck means (not shown) is provided on the upper surface of the separator 15 for detachably fixing the bobbin 4 of the transformer 1.

At the lower end of the holder 9 is provided a female engaging member 1 6, as a part of the clutch means 11, which cooperates with a male engaging member 17 on the upper end of a driving shaft 18 which is movable vertically and rotated by a pulse motor 19 fixed to a fastening plate 22.

In the middle part of the driving shaft 18 is formed a stopping flange 20 abutting against the upper end of a compressed coil spring 21 provided around the lower part of the driving shaft 18 and urging the driving shaft 18 upward. The driving shaft 18 is actuated in vertical direction by an actuating lever 23 pivotably supported by a supporting pillar 24. A small wheel 25 rotatably supported at the distal end of the actuating lever is disposed between the male engaging member 17 and the stopping flange 20.

The lead wire moving mechanism 12 has an Lshaped lever 26 having a horizontal part 26a and a crank-arm part 26b and fixed at the proximal end of its crank-arm part 26b to the front end of a horizontal rotating shaft 27 which is connected to and driven by a driving source (not shown) through a gear means (also not shown). A pair of mutually spaced-apart and parallel guide rods 29, 29 are fixed at their ends on one side (upper ends as viewed in FIG. 3) by respective nuts 30, 30 to the horizontal part 26a of the lever 26 and at their other ends (lower ends) to a connecting plate 31.

The guide rods 29, 29 at their intermediate parts are passed through and slidably support a supporting plate 28, which, at a corner thereof confronting the above described separator 15, supports a clip 13 for gripping the free end of a lead wire 6.

The supporting plate 28 is therefore slidable along the guide rods 29 and is urged toward the connecting plate 31 by a pair of compressed coil springs 32, 32 provided around the guide rods 29, 29, respectively, between the horizontal part 26a and the supporting plate 28. A pin 33 fixed at its upper end to the lower face of the supporting plate extends downwardly and loosely through a hole in the center of the connecting plate 31, and its lower free end confronts a pusher 34 fixed to the upper end of a piston rod 35 when the lead wire moving mechanism 12 is in a lower position as shown in FIG. 3. The piston rod 35 is moved approximately vertically by an air cylinder 36 fixed by a fastening plate 37.When the air cylinder 36 is operated to thrust the piston rod 35 outward, the pusher 34 on the piston rod 35 abuts against and pushes the pin 33 to cause the supporting plate 28 to be raised away from the connecting plate 31 against the force of the springs 32, 32.

FIG. 3 shows this state.

The clip 13 is orientated perpendicularly to the supporting plate 28 and comprises a fixed gripping bar 38, two spaced-apart and parallel supporting projections 39, 39 integral with the fixed bar 38, a swinging bar 40 disposed between and pivotally supported on the two supporting projections 39, 39, and a coil spring 41 provided between the rear end of the swinging bar 40 and the base portion of the fixed bar 38 to urge the swinging bar 40 to swing in the direction to cause the clip 13 to be closed.

At the rear end of the swinging bar 40 is provided a small cam follower 42 in the shape of a wheel, which follows and is actuated by a cam 43 rotatably mounted on the supporting plate 28 and having a radially outwardly projecting rod 44. As shown in FIGS. 3a and 3b, the cam 43 has two adjoining recesses 43a, 43b on its circumferential surface, either of which can engage the cam follower 42. The first recess 43a is formed more deeply toward the center of the cam 43 than the second recess 43b as clearly shown in FIGS. 12 and 1 3. That is, when the cam follower 42 engages with the first recess 43a, the rear end of the swinging bar 40 is moved away from the base portion of the fixed bar 38 by the coil spring 41 to cause the clip 13 to be closed. On the other hand, when the cam follower 42 engages with the second recess 43b, the rear end of the swinging bar 40 is pushed toward the base portion of the fixed bar 38 to cause the clip 13 to be opened.

The cam 43 is operated by a clip closing means 45 as shown in FIG. 3 and a clip opening means 46 which form the clip operating mechanism 14 mentioned hereinbefore. The clip closing means 45 has an L-shaped lever 47 pivotably supported by a fastening plate 48. One arm 47a of the lever 47 is disposed near the rod 44 of the cam 43 when the lead wire moving mechanism 12 is in the lower position, and the other arm 47b is connected to the piston rod 49 of an air cylinder 50 fastened by a fastening plate 51.

As shown in FIGS. 12, 1 3a, and 13b, the clip opening means 46 has a vertical supporting plate 52 for supporting an L-shaped operating lever 53 which is mounted rotatably in one direction on the plate 52 by a pin 54. Around the pin 54 is provided a torsion coil spring 55 urging the pin 54 to rotate in the direction of the arrow C to cause the operating lever 53 to be rotated in the same direction. A stop 56 extends toward the index table 7 so as to stop a pin 57 provided on the back surface of the operating lever 53 whereby the lever 53 is prevented from rotating in the direction of the arrow C. The horizontal surface 53a of the lever 53 is so positioned that its front end engages the rod 44 of the cam 43.

The operation of the device of the above described construction according to this invention is as follows.

When the lead wire moving mechanism 12 is in lower position as shown in FIG. 3, the arm 8 of the index table 7 moves the holder 9 holding the transformer 1 with the capacitor 5 in the recess 2a to a position confronting the mechanism 12. Then, the male engaging member 17 is engaged with the female engaging member 1 6 by the actuating lever 23 whereby the clutch 11 is engaged. At this time, the air cylinder 36 is operated to raise the supporting plate 28 away from the connecting plate 31 with the clip 13 opened so as to receive the end of the lead wire 6 hanging along the separating groove 15a between the swinging bar 40 and the fixed bar 38. When the mechanism 12 is in the lower position, the clip 13 is opened by the cam follower 42 engaging the second recess 43b of the cam 43 as more clearly described hereinafter.Then, the air cylinder 50 is operated so that the lever 47 can rotate the cam 43 via the rod 44 whereby the cam follower 42 is moved into the first recess 43a to close the clip 13. After the clip 13 grips the end of the lead wire 6, the air cylinder 36 is shrunk operated to retract its piston rod 35 thereby to release the supporting plate 28, and accordingly the plate 28 is urged downwardly under the repulsive force of the coil springs 32 with the clip 13 holding the stretched lead wire 6 as shown in FIG. 4. Then, the lead wire moving mechanism 12 is turned to a horizontal position as shown in FIG. At this time the rod 44 of the cam 43 engages against the operating lever 53.

However, the lever 53 is permitted to rotate clockwise and accordingly the cam 43 passes upwardly without its rotation as shown in FIG.

13 (b). In this state, the holder 9 is rotated 180 degrees in the direction of the arrow A so that the root portion of the lead wire 6 to be disposed is placed just under one of the guide grooves 2c on the side faces of the transformer 1. Thereafter, the lead wire moving mechanism 12 is moved to an upper position with the clip 13 holding the lead wire 6 to lead it into the guide groove 2c as shown in FIG. 7, and then the holder 9 is turned back 90 degrees in the direction of the arrow B with the lead wire 6 held in the guide groove 2c as shown in FIG. 8.

Thereafter, the lead wire moving mechanism 12 is turned back to the horizontal position with the clip 13 holding the stretched wire 6 under the repulsive force of the coil springs 32 so that the root portion of the lead wire 6 passes inside of the terminal pin 3 along the upper surface of the transformer 1 as shown in FIG. 9.

Furthermore, the holder 9 is turned 90 degrees in the same direction as that in FIG. 6 with the lead wire 6 led around the root portion of the terminal pin 3. When the lead wire moving mechanism 1 2 is moved downwardly over the horizontal position, the rod 44 of the cam 43 engages against the horizontal surface of the operating lever 53 thereby to rotate the cam 43 counter-clockwise. Accordingly, the cam follower 42 is moved into the second recess 43b from the first recess 43a to open the clip 13 as shown in FIGS. 12 and 13 (a). After the clip 13 is opened to release the lead wire 6, the holder 9 is rotated 180 degrees in the direction of the arrow A from the state as shown in FIG. 10 while the mechanism 12 is moved toward the lower position as shown in FIG. 11.At this time, the lead wire 6, having been thus disposed, extends toward the index table 7, and another lead wire 6 not yet disposed is brought to confront the mechanism 12.

The clutch 11 is then opened by the operation of the operating bar 23; and thereafter the index table 7 is rotated a specific angle to transfer the transformer 1 with one of the lead wires 6, which has already been disposed, to a similar mechanism (not shown) for disposing the remaining lead wire 6. Thus, the mechanism 12 is ready for disposing a new one of the lead wires transferred by the rotation of the index table 7.

According to this invention of the above described construction, the winding operation of the lead wires can be carried out automatically and successively thereby to remarkably increase the efficiency of production. Furthermore, if the movements of the lead wire mechanism 12 and the holder 9 with the transformer 1 are properly combined with each other, this device M can be easily applied to various transformers having terminal pins provided in different positions.

While the invention has been described above with respect to a specific embodiment in which the lead wires of a capacitor are wound around the base of an intermediate-frequency transformer, this invention should not be defined by only this embodiment, this invention being applicable to other operations in which lead wires of other circuit elements are wound around the bases of other electrical components.

Furthermore, the clip 13 and the clutch 11 can be modified in various ways, and also solenoids or cams can be used instead of the air cylinders 36, 50. In addition, the combination of a conventional motor and cam can be substituted for the pulse motor 19. In this embodiment of the invention, the lead wire moving mechanism 12 disposes of only one of two wires. If the mechanism 12 is adapted to be moved in the lateral direction in response to the length between two lead wires 6, 6 of the capacitor 5, it can dispose of two lead wires 6, 6 without rotation of the index table 7.

Claims

1. A device for winding the lead wires of a circuit element around the base plate of an electronic component comprising: a rotatable holder (9) for holding an electronic component (1) having a base plate (2) on which terminal pins (3) are embedded; a lead wire moving mechanism (12) movable upwardly and downwardly between lower and upper positions around the electric component (1) and having a clip (13) for releasably gripping one of the lead wires (6,6) during a winding operation, which clip (13) is biased by at least an elastic member and can move to and away from the electric component (1) during the winding operation; and a clip operating mechanism (14) for closing and opening the clip (13) in response to the movement of the lead wire moving mechanism (12), the holder (9) and lead wire moving mechanism (12) being operated interrelatedly with each other.

2. A device according to claim 1 in which said rotatable holder (9) is connected to a driving source (19) via a clutch (11) and is supported by one of the arms (8, 8 ....8) 8) of an intermittently rotatable index table (7).

3. A device according to claim 1 in which said rotatable holder (9) has a separator 15 at its upper end, which separately guides toward the mechanism (12) the lead wires (6,6) of the circuit-element hanging from the lower surface of the base plate.

4. A device according to claim 1 in which said lead wire moving mechanism (12) comprises a rotating shaft (27), a lever (26) fixed to the rotating shaft (27), at least one guide rod (29) fixed to the lever (26), and a supporting plate (28) slidable along the guide rod (29), said clip (13) being fixed to the supporting plate (28), said supporting plate (28) being downwardly biased by one or more springs (32) provided around the guide rod 29.

5. A device according to claim 4 in which said supporting plate (28) is slightly raised by a raising means (33, 34, 35, 36).

6. A device according to claim 1 in which said clip operating mechanism (14) comprises a clip closing means (45) for closing the clip (13) to grip the lower end of the lead wire (6) when the lead wire moving mechanism (12) is in the lower position, and a clip opening means (46) for opening the clip (13) via a cam means (42, 43, 44,) during the descending movement of the lead wire moving mechanism (12).

7. A device according to claim 6 in which said clip opening means (46) has an operating lever (53) rotatable in only one direction, a cam 43 of the cam means (42, 43, 44) being rotated by the lever (53) only during the descending movement of the lead wire moving mechanism (12).