JPH0262927B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing toroidal coils, specifically aligned single-wound coils and random-wound coils, using a winding machine.

[Conventional technology]

A winding machine for making a toroidal coil by winding a winding machine around an annular core includes a core holding device that rotates the core around its axis, and a core holding device that rotates the core by intersecting with the core and being introduced into the core and rotating. It is equipped with a shuttle which is freely supported to store the winding material and then wind it around the core while unwinding it, a core holding device and a synchronous drive device for the shuttle.

The core holding device consists of three rubber rollers 1, 1A, 1B, and 1C each having a flange plate 2 made of hard resin, as shown in a perspective view of the main part in FIG.

The rollers 1A and 1B have their lower ends pivoted on the other end of a base plate 3 that can rotate horizontally as shown by arrows around one end, and are driven by a drive mechanism built into the base plate 3. This is a drive roller coaxially fitted and mounted on the upper end of the upright shaft 4.

The roller 1C is a driven roller fitted into the upper end of an upright shaft 6 which is rotatably supported at the lower end of the base plate 5. The base plate 5 can move linearly as shown by the arrow along the perpendicular bisector of the line segment connecting the rotational center point of the base plate 3, and has built-in biasing means in the direction of the outlined arrow. .

The annular core 7 is placed on the collar plate 2 by adjusting the movement of the rollers 1A, 1B, and 1C using a handle (not shown), and the roller 1 is pressed against the outer periphery of the core 7 from three sides to hold the core 7. A shuttle 8 (parts indicated by chain lines) is introduced into the center hole of the core 7 from its inlet and crosses, and the inner periphery of the shuttle 8 is rotatably supported by an internal roller. For example, the wire is rotated in a direction passing through the core from bottom to top) to store a required length of winding material in its outer circumferential wire storage groove. Next, after holding the winding start end in the locking part, the shuttle 8 is rotated in the opposite direction to the wire storage direction (the shuttle 8 passes through the core from top to bottom), and at the same time, the core 7 is rotated in synchronization with the rotation of the shuttle 8. The winding material is wound around the core 7 between the rollers 1A and 1B, and the winding material is wound in an aligned manner or in a random manner up to about 90% of the circumference of the core 7. I was making a rotating toroidal coil.

[Problem that the invention seeks to solve]

Conventionally, since the core 7 was brought into direct contact with the roller 1 of the core holding device, there was a problem that the winding pitch of the winding material changed every time the winding material wound around the core 7 reached the stage of contacting the roller 1. It was hot. FIG. 5 shows the stage of contact between the roller 1A and the winding material. At the beginning of winding, the roller 1C and the core 7, which are located at the position shown by the dashed line, are displaced as shown by the solid line, that is, the center of rotation of the core 7 moves, and the relative relationship with the axis of the shuttle 8 changes. Therefore, the winding pitch of the winding material changes, and in the case of aligned winding, the winding is uneven and the appearance of the coil is poor.

[Means for solving problems]

The present invention provides a method for manufacturing a toroidal coil using a winding machine equipped with a core holding device and a shuttle so that a roller is pressed against the outer periphery of an annular core to hold the core and rotate the core around its axis. A core assembly in which a flexible plate having a required thickness is wound around the outer periphery of the core is held by a core holding device, and the winding material is wound around the core while removing the flexible plate from one end. do.

〔Example〕

An embodiment of the present invention will be described in the case of aligned winding with reference to FIGS. 1 to 3. In the figure, the same parts as in FIG. 4 are given the same reference numerals.

FIG. 1 shows the state in which the core assembly 10 is held by rollers 1. As shown in FIG. The core combination body 10 is
A plate 9 made of a flexible material such as rubber and having a thickness that is approximately the same as the diameter of the winding material is wound approximately once around the outer circumference of the annular core 7 (with a length that slightly overlaps in the figure). The starting end of 9 is roller 1A, 1
It is held by the roller 1 so as to be located in the middle of B (a position facing the shuttle 8). The plate 9 from the roller 1B to the end is peeled off from the core 7, and the U of the guide member 11 provided between the roller 1B and the shuttle 8 is removed.
It is inserted into the shaped groove and passed through.

A shuttle 8 is introduced into the core 7 in the state shown in FIG. 1, and after the wire is stored, the winding material is wound.

The shuttle 8 rotates in a direction passing through the core 7 from above to below, and the core assembly 10 moves between the drive rollers 1A,
FIG. 2 shows a state in which the wire is rotated by 1B in the direction shown by the arrow and the winding material is wound around the core 7 once. Rotating the core assembly 10 while removing the plate 9 from the core 7 after passing through the roller 1B,
The core 7 from which the plate 9 has been removed is advanced to a position facing the shuttle 8 and winding of the winding material is performed. The plate 9 is guided by a guide member 11 so as not to interfere with the rotation of the shuttle 8.

FIG. 3 shows a state in which the winding material is in progress and comes into contact with the roller 1A. The center of rotation of core assembly 10 is the same as in FIG. It will be understood without further explanation that the center of rotation of the core 7 similarly remains at the same point at the stage when the winding material contacts the rollers 1C and 1B. In this manner, the core 7 rotates without shifting its center throughout the entire winding period of the winding material, so that the winding pitch of the winding material can be maintained constant. Therefore, in the case of aligned winding, there is no disturbance and the winding can be performed neatly.

〔Effect of the invention〕

Although the case of aligned winding has been described as an example, when thin wire is randomly wound and the winding becomes thicker than the wire diameter on the outer surface of the core, the same effect can be obtained by using the plate 9 with a thickness corresponding to the winding thickening. The winding pitch can be kept constant.

According to the present invention, since the winding pitch of the winding material is constant, the tension acting on the winding material is also approximately constant, and a high-quality toroidal coil with uniform winding can be obtained.

[Brief explanation of the drawing]

1 to 3 are plan views showing rollers of a core holding device for explaining one embodiment of the present invention;
The figure is a perspective view showing a main part of a core holding device of a toroidal winding machine, and FIG. 5 is a plan view of a roller portion of the core holding device showing a conventional core holding state. 1... Rubber roller, 1A, 1B... Drive roller, 1C... Followed roller, 2... Flange plate, 3, 5
... Base plate, 4, 6 ... Shaft, 7 ... Annular core, 8
... shuttle, 9 ... flexible plate, 10 ... core assembly, 11 ... guide member.

Claims (1)

[Claims] 1. Toroidal coil production using a winding machine equipped with a shuttle and a core holding device that holds a plurality of rollers in contact with the outer periphery of an annular core and rotates the core around its axis. The method for manufacturing a toroidal coil is characterized in that a core assembly in which a flexible plate is wound around the outer periphery of the core is held by the holding device, and a winding material is wound around the core while removing the flexible plate from one end. Production method.