JPH0219947Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a coil winding tool, and particularly relates to an improvement of a winding tool suitable for manufacturing a coil wound in multiple layers in a cylindrical shape.

[Conventional technology]

Conventionally, as shown in FIGS. 11 and 12,
A coil 2 is made by winding a wire 1 such as a polyurethane conductor in multiple layers into a cylindrical shape.
It is formed by rolling it forward. In addition, the numbers 3 and 4 in the figure
are the winding start part and the winding end part of the coil 2.

However, such a multilayer coil 2
It is difficult to wind the wire in multiple layers in an accurate alignment due to the wire diameter of the wire 1, the temperature during winding, variations in dimensions of each part of the winding machine, etc.

If the multilayer coil 2 is not wound in an accurate alignment, the space factor will be lowered, the magnetic force will be lowered, etc., and the performance of the electronic device using the multilayer coil 2 will be likely to deteriorate, and the appearance will also be poor.

On the other hand, in the multilayer coil 2, the course of the wire 1 is sequentially shifted to the outside when moving from the inner layer to the outer layer, so as shown in FIG. A so-called cross point P, which is a point where the wire 1 intersects diagonally, occurs, and if the wire is not wound in an aligned manner, the position of the cross point P will be irregular.

Therefore, attention has been paid to this point in the past, and efforts have been made to generate the cross points P at regular positions, but these efforts have been insufficient. Incidentally, even in the case of the best yield, the limit was about 90%.

As a result of extensive research into the method of winding the multilayer coil 2, the inventor of the present invention has discovered a means to forcibly generate the cross point P.

[Problem that the invention attempts to solve]

The present invention was developed under these circumstances, and is intended to provide a coil winding tool that facilitates accurate multilayer alignment winding and has a high manufacturing yield.

[Means for solving problems]

In order to solve these problems, this invention
A coil winding device in which first and second members, each of which is arranged so that its opposing surfaces are parallel to each other, are connected by a winding shaft, wherein the first and second members are arranged such that their opposing surfaces are parallel to each other. and a coil winding tool in which a second member is connected by a winding shaft, the wire to be wound is pushed back inward to at least one of the opposing surfaces of the first or second member. The push-back portion is configured to protrude from the opposing surface and extend from near the winding shaft toward the side surface of the winding tool.

[Effect]

According to the coil winding tool of the present invention,
When winding the wire by applying feed between the opposing surfaces of the first and second members, when the wound wire reaches the opposing surface of the first or second member, it is forcibly forced by the push-back section. The coil is bent back inward, that is, toward the other opposing surface to form a cross point, and a plurality of cross points of the wound coil are further arranged along the pushed-back portion.

〔Example〕

Examples of the present invention will be described below.

FIG. 1 is an exploded perspective view showing an embodiment of a coil winding tool according to the present invention, and this winding tool is constructed by combining a first winding tool 5 and a second winding tool 6. ing.

As shown in FIGS. 1 and 2, the first winding tool 5 includes a first winding shaft portion 7 and a holding portion 8 that holds the first winding shaft portion 7.

The cylindrical first winding shaft 7 is divided into two halves by a slit 9 formed halfway from its tip, and its base 10 is formed into a cylindrical shape with a large outer diameter. The holding part 8 has a cylindrical shape with one end side closed by a closing part 11,
The base portion 10 of the first winding shaft portion 7 has an inner shape into which the base portion 10 fits, and a first
A through hole 12 into which the winding shaft portion 7 fits is formed.

The surface of the closing portion 11, that is, the end surface 13 of the holding portion 8
A linear protrusion 14 is provided protrudingly extending from the through hole 12 to the side surface of the holding portion 8, and this protrusion 14 extends in the tangential direction of the through hole 12.

The first winding shaft portion 7 is assembled with its base portion 10 held within the holding portion 8 so as to protrude from the through hole 12.

As shown in FIGS. 1 and 3, the second winding tool 6 has a second winding shaft portion 1 in the shape of a thin and elongated strip.
5 and a holding section 16 that holds it.

The second winding shaft portion 15 has a large diameter cylindrical base portion 17 at its longitudinal end. The holding part 16 is
It has a cylindrical shape with one end side closed by a closing part 18, and has an inner shape into which the base 17 of the second winding shaft part 15 fits, and the central axis of the holding part 16 in the closing part 18 (described later). A through hole 19 similar to the through hole 12 is formed at a position corresponding to the rotation axis).

A chevron-shaped tooth 20 extending in the thickness direction is integrally provided at the tip of the second winding shaft portion 15 at a position slightly closer to the end (downward in the figure) from the center in the width direction. The distance between the top of the winding shaft 20 and the end surface of the second winding shaft 15 on both sides thereof is different (T
>t). Moreover, the interval t is smaller than the wire diameter of the wire rod 23, which will be described later, and T is selected to be approximately the wire diameter of the wire rod 23.

In the part near the base 17 of the second winding shaft part 15,
A gap is formed between the second winding shaft portion 15 and the inner wall of the through hole 19, into which the tip of the first winding shaft portion 7 fits, as will be described later.

The second winding shaft portion 15 has its base portion 17 held within the holding portion 16 so that the through hole 19
It is combined so that it protrudes from the top.

Note that in each of the first and second winding tools 5 and 6,
The cross-sectional shape of the first winding shaft 7 and the through hole 12 are designed to prevent the first winding shaft 7 and the holding part 8 and the second winding shaft 15 and the holding part 16 from rotating and shifting. shape,
It is preferable that the base portions 10, 17 of the first and second winding shaft portions 7, 15 and the holding portions 8, 16 have an elliptical shape, or that a stopper (not shown) for preventing rotation is provided.

As shown in FIG. 4, in the first winding tool 5 and the second winding tool 6, the second winding shaft section 15 is fitted into the slit 9, and the first winding shaft section 7 is fitted into the first winding shaft section 7. A winding tool having a cylindrical winding shaft 21 is constructed by inserting the tip end of the wire into the through hole 19.

Note that the depth of the slit 9 and the length of the second winding shaft portion 15 described above are such that when the tip of the first shaft portion 7 comes into contact with the base portion 17, there is a gap between the bottom portion 9a of the slit 9 and the teeth 20. The dimensions are such that a slight gap is created between the end surfaces (opposing surfaces) 13 and 22 of the first and second winding tools 5 and 6, for example, when the holding portion 16 is attached to the second winding shaft portion 15. By configuring it so that it can move forward and backward independently, the dimensions are such that the distance corresponds to the thickness S of the coil 25, which will be described later.

Next, an example of use of the coil winding tool of the present invention will be described.

First, as shown in Figures 5 and 6,
and the second winding tools 5, 6 to the second winding shaft portion 15.
They are placed opposite each other on the same rotational axis Q so that they fit into the slit 9, and a wire rod 23 stretched perpendicular to the rotational axis Q is placed between them.

The first winding tool 5 and the second winding tool 6 are supported so as to be movable back and forth so as to approach each other, and the first winding shaft portion 7 is connected to a rotational drive means 24, so that the entire winding tool is designed to be rotationally driven.

Then, the first and second winding tools 5 and 6 are moved forward relative to each other, and as shown in FIG. 6 (see FIG. 4), the second winding shaft portion 15 is fitted into the slit 9. The wire rod 23 is sandwiched between the bottom portion 9a of the winding shaft portion 15 and the tip portion of the second winding shaft portion 15.

In this case, as shown in FIG. 7, the teeth 20 of the second winding shaft part 15 are in a state of biting into the wire rod 23, and the wire rod 28 is connected to the tip surface of the second winding shaft part 15 and the bottom of the slit 9. It is held in a crushed state between 9a. That is, the bottom 9a of the slit 9 and the tip of the second winding shaft portion 15 form a clamping portion for the wire 23. Note that if the tip end surface of the second winding shaft portion 15 is roughened, the wire rod 23 can be strongly held.

Next, the wire 23 led out to the open side of the wire 23, for example, to the lower side in FIG. 6, is pulled and cut and removed.

While the remaining portion of the wire 23 is being held, as shown in FIG. The wire rod 23 is wound in alignment around the winding shaft 21 by applying reciprocating feed in the direction of the rotation axis Q with a spacing S corresponding to the distance between the end surfaces 13 and 22 of the first winding tool 5 and the second winding tool 6.

In the middle of winding the wire rod 23, when the second layer wire rod 23 reaches the end surface 13 of the first member 5, as shown in FIG. Since it contacts and is forcibly bent back inward, that is, toward the second member 6 by the protruding strip 14, a cross point occurs here and the aligned winding of the third layer begins. Similarly, when moving from the fourth layer to the fifth layer, a cross point occurs at the protrusion 14 and the coil 25 is wound.

When the winding is completed, the first and second winding tools 5 and 6 are moved backward relative to each other and the coil 25 is removed.

In the coil 25 manufactured in this way, cross points are forcibly created by the protrusions 14,
Since the plurality of cross points are arranged along the ridges 14, the finished coil 25 is wound in accurate alignment.

According to the inventor's experiments, the protruding strip 1 with a thickness of 0.1 mm
Using a first winding tool 5 and a second winding tool 6 having a diameter of 0.2 mm, a fusible polyurethane conductive wire with a wire diameter of 0.2 mm is wound around the winding shaft 21 in 210 turns and 20 layers while blowing hot air to form a coil 25. A yield of over 98% was obtained.

In the above-described embodiment, the protrusions 14 were formed only on the first winding tool 5, but if the coil 25 is thick, they may also be provided on the end surface 22 of the second winding tool 6. 14 is also not limited to a straight line, but may be formed in a curved line.

Furthermore, in the coil winding tool of the present invention, the means for forcibly creating a cross point is not limited to the protruding strip 14, but is also used on the end surface 13 of the first winding tool 5, as shown in FIGS. A protruding inclined surface 26 is formed, and the wire 23 is moved while moving this inclined surface 26.
It is also possible to form cross points.

In short, the push-back part that pushes back the wire 23 inward during winding protrudes from the opposing surface of the first or second winding tool 5, 6, that is, at least one of the opposing surfaces, and also extends from the winding shaft 21. The object of the present invention can be achieved if it is formed so as to extend from the root in the side direction of the first or second winding device 5, 6. In addition, it is preferable that the push-back portions such as the above-mentioned protrusions 14 and inclined surfaces 26 be formed so that the wire rod 23 to be wound comes into contact with the winding shaft 21 from near the side surface of the first winding tool 5. If the wire rod 23 hits the push-back section, there is a risk that the wire rod 23 will be damaged.

In addition, the first and second winding tools 5 and 6 described above are
is formed by the first winding shaft part 7 and the holding part 8, and the second winding shaft part 15 and the holding part 16, but the winding shaft part and the holding part may be integral, and the first winding shaft part and the holding part and the second
The winding shaft portion 21 may be provided on one of the winding tools 5 and 6. That is, the present invention can be arbitrarily implemented in a winding tool in which first and second members, each of which is arranged so that its opposing surfaces are parallel to each other, are connected by a winding shaft.

By the way, when winding a coil on the winding tool of the present invention, it is also possible to fix the first and second winding tools 5 and 6 and wind the wire 23 using a flyer that rotates around the winding shaft 21. It is.

[Effect of idea]

As explained above, the coil winding tool of the present invention can easily control the formation positions of a plurality of cross points and can perform accurately aligned multilayer winding, resulting in a high manufacturing yield.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a coil winding tool according to the present invention, and FIGS.
FIG. 4 is a vertical sectional view of the coil winding tool shown in FIG. 1, and FIGS.
Figure 9 is a front view showing an example of the use of the coil winding tool shown in Figure 1 (however, Figure 7 is a partial sectional view);
Figures A and B are views showing other examples of the push-back portion of the coil winding tool of the present invention, and Figures 11 and 12 are a half sectional view and a plan view showing a multilayer coil. 1,23...Wire rod, 2,25...Coil, 5...
... Winding shaft tool (first winding tool), 6 ... Winding shaft tool (second winding tool)
winding tool), 7...first winding shaft portion, 8, 16...
Holding part, 9... slit, 10, 17... base,
12, 19...Through hole, 13, 22...Opposing surface (end surface), 14...Pushing back part (convex strip), 15...Second winding shaft part, 20...Teeth, 21... Winding shaft , 26...
...Push-back part (slanted surface), P...Cross point.

Claims (1)

[Claims for Utility Model Registration] (1) A wire rod to be wound in a coil winding device in which first and second members, each of which is arranged so that their opposing surfaces are parallel, are connected by a winding shaft. A push-back portion that pushes back the wire inwardly protrudes from at least one of the opposing surfaces of the first or second member and extends from the vicinity of the winding shaft in the side direction of the winding tool. A coil winding tool characterized by being formed so as to extend into a coil. (2) The coil winding tool according to claim 1, wherein the push-back portion is a convex strip. (3) The coil winding tool according to claim 1, wherein the push-back portion is an inclined surface protruding from the opposing surface.