JP2001358006A - Coil, and method and device for manufacturing it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for forming a litz wire before manufacturing a coil. SOLUTION: There are provided a plurality of bobbins 1 where a specified element wire is wound, a primary convergence plate 3 and a secondary convergence plate 4 for, with a plurality of holes provided to a plate-like member with specified intervals, bundling a plurality of element wires from the plurality of bobbins 1 for surface-like cross-section without entangling, and a coil core die 8 for taking up a plurality of elements bundled with the primary and secondary convergence plates 3 and 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil, a method for manufacturing a coil, and an apparatus for manufacturing a coil.

[0002]

2. Description of the Related Art A conventional coil used in, for example, a copying machine will be described with reference to FIGS. 14, 15, 16 and 17. FIG. FIG. 14A is a front view of a cylindrical single-layer coil, and FIG. 14B is a side view. FIG. 15 is a configuration diagram of a multilayer coil. As shown in FIG.
(A) shows the front of the multilayer coil, and (b) of FIG. 15 shows the side of the multilayer coil.

Incidentally, the coil shown in FIGS. 14 and 15 is formed of a winding wire composed of a litz wire in which a large number of strands are tangled. As shown in FIG. 16 (b), the litz wire is, for example, 19 strands tangled, and a winding wire is formed by further tangling the plurality of litz wires. FIG. 17 shows seven litz wires formed from 19 strands,
1 shows a cross section of a wound wire obtained by further entanglement. FIG. 16A shows a cross section of a litz wire.

[0004]

As described above, the conventional coil is formed of a winding wire in which a plurality of litz wires in which a plurality of strands are entangled are further entangled. There has been a problem that dimensions cannot be made with high accuracy. Also, since the wires are tangled,
There are also problems that the space loss is large, the space factor of the wire is low, and it is difficult to reduce the size of the coil. Further, the conventional coil has a problem that the coil resistance is large and the weight is heavy.

Further, there is another problem that it is necessary to form a litz wire before forming a coil, and that a plurality of litz wires must be entangled in advance.

The present invention has been made in consideration of the above-mentioned conventional problems, and has a high accuracy in outer diameter dimensions, a small space loss, a high space factor and a small size, and a coil having a small coil resistance value and a light weight. The purpose is to provide.

Further, the present invention relates to a method for manufacturing a coil,
An object of the present invention is to provide a coil manufacturing method and a coil manufacturing apparatus for manufacturing a coil without forming a litz wire in advance and without tying a plurality of litz wires in advance.

[0008]

Means for Solving the Problems The first invention (claim 1)
) Is a cylindrical coil formed of a winding having a predetermined thickness, wherein the winding is a bundle of a plurality of strands, each of the plurality of strands, The coil is characterized in that the coils are bundled without being entangled and with a cross-sectional surface.

A second aspect of the present invention (corresponding to claim 2) is that the element wire is coated with an insulating material.
According to the present invention.

According to a third aspect of the present invention (corresponding to claim 3), the winding wire in which a plurality of the element wires are bundled is coated with an insulating material. Coil.

According to a fourth aspect of the present invention (corresponding to claim 4), the wire is taken out from each of a plurality of bobbins around which a predetermined wire is wound, and the plurality of wires are tangled. And a coil is manufactured by winding the plurality of bundled wires with a predetermined winding core to form a coil.

A fifth aspect of the present invention (corresponding to claim 5) is that, when winding up the plurality of wires bundled by the winding core, the bobbin and the winding core of each of the plurality of wires are wound. A fourth method of manufacturing a coil according to the present invention, wherein the tension between the coils is controlled according to the distance from the center axis of the winding core.

According to a sixth aspect of the present invention (corresponding to claim 6), the outer surface of each of the strands wound on the bobbin is covered with a predetermined adhesive, and the bundle is wound with the winding core. The coil manufacturing method according to the fourth or fifth aspect of the present invention, wherein the plurality of bundled strands are fixed after the wound plurality of strands are wound up.

According to a seventh aspect of the present invention (corresponding to claim 7), the outer surface of each of the strands wound on the bobbin is not covered with an adhesive, and the bundles are bundled with the winding core. In winding up the plurality of strands, while fixing the strands at the beginning of the winding, the bundled strands to be wound thereafter are pressed while being pressed against the winding start side in the center axis direction of the winding core. A fourth aspect of the present invention is the method of manufacturing a coil according to the fourth or fifth aspect of the present invention.

According to an eighth aspect of the present invention (corresponding to claim 8), a plurality of bobbins on which predetermined wires are wound, and a plurality of the wires from each of the plurality of bobbins,
One or a plurality of convergence means having a plurality of holes provided at predetermined intervals in a plate-shaped member, for bundling without tangling and having a cross section in a planar shape; And a winding core for winding up the plurality of wires bundled together.

According to a ninth aspect of the present invention (corresponding to claim 9), the tension between the bobbin and the winding core of each of the plurality of strands wound by the winding core is determined by the winding core. An eighth aspect of the present invention is the coil manufacturing apparatus according to the eighth aspect, further comprising control means for performing control in accordance with the distance from the central axis of the coil.

A tenth aspect of the present invention (corresponding to claim 10) is:
An outer surface of each of the strands wound on the bobbin is coated with a predetermined adhesive, and is disposed between the convergence means and the winding core, for melting the adhesive. Eighth or ninth means further comprising a melting means and a heating means for heating the melted adhesive.
Is a coil manufacturing apparatus according to the present invention.

The eleventh invention (corresponding to claim 11) provides:
An outer surface of each of the strands wound in the bobbin is not covered with an adhesive, and fixing means for fixing the beginning of winding of the strand to be wound on the winding core, and the fixing means A pressing step for pressing the bundled element wire wound after the fixed element wire to the element wire on the winding start side, wherein a predetermined step is provided on the winding start side. The coil manufacturing apparatus according to the eighth or ninth aspect of the present invention, further comprising: means for moving the pressing means in a central axis direction of the winding core.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) First, a coil according to Embodiment 1 of the present invention will be described with reference to FIGS. FIG.
FIG. 1A is a front view of a cylindrical single-layer coil, and FIG.
Is a side view. FIGS. 1A and 1B are diagrams corresponding to the explanatory diagram of the conventional one-layer coil shown in FIG. 14A or 14B.

FIG. 2 is a view showing one section of a winding wire forming the coil of the first embodiment shown in FIG. As shown in FIG. 1A, the coil according to the first embodiment is a cylindrical coil formed by a winding, and the winding is a bundle of a plurality of strands. Instead of being composed of a litz wire as shown in FIGS. 16 and 17, the plurality of wires are bundled without being entangled and having a planar cross section. Furthermore, the winding forming the coil of the first embodiment is formed by bundling a large number of strands substantially in parallel.

In the conventional winding, a plurality of litz wires in which a plurality of strands are entangled are further entangled, so that a large step is formed on the outer periphery of the winding as shown in FIG. I was On the other hand, the winding of the coil according to the first embodiment is formed by bundling a large number of strands substantially in parallel without being entangled. Therefore, as shown in FIG. 1A and FIG. No large steps are formed on the outer periphery.

Therefore, when a coil is formed by windings composed of substantially the same number of strands, the coil of the first embodiment of the present invention has higher outer diameter dimensional accuracy than conventional coils, and The radial shape is flat. Also,
The space loss is small, the space factor is high, and the coil is smaller than before. Further, since the coil of the first embodiment does not use a litz wire, the coil resistance value is smaller than that of the conventional coil. Such a low resistance value can contribute to energy loss when used in, for example, a copying machine.

It is preferable that each bundled element wire is coated with an insulating material. This is because the skin effect at high frequencies is improved. Alternatively, each of the strands may not be coated with the insulating material, and the outer surface thereof may be coated with the insulating material after being bundled.

Next, a coil manufacturing apparatus for manufacturing the coil of the first embodiment described above with reference to FIGS. 1 and 2 will be described with reference to FIGS. FIG. 3 shows Embodiment 1 of the present invention.
FIG. 4 is a front view of the coil manufacturing apparatus, and FIG. 4 is a plan view of the coil manufacturing apparatus.

As shown in FIGS. 3 and 4, Embodiment 1
The coil manufacturing apparatus of the present invention includes a number of bobbins 1, rotating rollers 2a and 2b, a primary converging plate 3, a secondary converging plate 4,
Alcohol impregnating device 5, square hole converging device 6, heater 7
, A coil-wound core mold 8, a traverse slide 9, a ball screw 10, a shaft 11, and a winding machine base 1.
And 2.

The bobbin 1 has a predetermined wire wound thereon, and the outer surface of the wire is covered with an adhesive. Although only two bobbins 1 are shown in FIGS. 3 and 4 for convenience of description, there are actually many bobbins.
The rotating rollers 2a and 2b are means for guiding the wire wound on the bobbin 1 to the primary converging plate 3 side.

As shown in FIG. 5, the primary converging plate 3 is a plate provided with a large number of holes at predetermined intervals, and is a means for converging the wires from the large number of bobbins 1. is there. The wire from each bobbin 1 is connected to the primary converging plate 3
Will pass through each hole provided in the hole. Second converging plate 4
As shown in FIG. 6, is a plate provided with a large number of holes at predetermined intervals similarly to the primary converging plate 3, and is a means for further converging a large number of strands. The interval between the holes provided in the secondary converging plate 4 is smaller than the interval between the holes provided in the primary converging plate 3.

The alcohol impregnating device 5 is a device for storing alcohol, and the alcohol is used to melt the adhesive coating the outer surface of the strand. As shown in FIG. 7, the inside of the alcohol impregnating device 5 is provided with a through-hole 5a having a larger cross-sectional area than the area of the through-hole for forming the cross section of the final wound wire.
Is used to further converge a large number of wires converged by the primary converging plate 3 and the secondary converging plate 4. FIG. 7 is a diagram showing the alcohol impregnating device 5 when the alcohol impregnating device 5 is viewed from the square hole converging device 6. Further, in the first embodiment, the cross section of the through-hole 5a is assumed to be square for convenience of explanation, but the cross-sectional shape is not limited to a square.

As shown in FIGS. 3 and 8, the square hole converging device 6 has a through hole 6a having a predetermined cross-sectional area for forming a cross section of the final winding wire. This is a means for finally converging the element wire that has passed through the alcohol impregnating device 5 to form a wound wire. The heater 7
This is a means for heating the element wire which has passed through the square hole converging device 6 and in which the adhesive is melted. Note that FIG.
FIG. 4 is a diagram showing the heater 7 and the hole focusing device 6 when the hole focusing device 6 is viewed from the side.

The coil-wound core mold 8 is a means for winding a winding wire formed by bundling a large number of strands substantially parallel and passing through the rectangular hole converging device 6. As shown, a winding core 8a surrounded by a coil inner diameter mold 8b,
It is composed of a right side plate 8c and the like.

The traverse moving table 9 includes a primary converging plate 3, a secondary converging plate 4, an alcohol impregnating device 5, a square hole converging device 6,
And a table on which the heater 7 is placed. Ball screw 10
Is a means for moving the traverse movable base 9 on the winding machine base 12 in a direction substantially perpendicular to the traveling direction of the strand by applying an external rotation. The shaft 11 is a means for moving the traverse slide 9 together with the ball screw 10 in a direction substantially perpendicular to the traveling direction of the strand. The winding machine base 12 includes a traverse moving base 9, a ball screw 10,
And a table on which the shaft 11 is mounted.

Next, the operation of the coil manufacturing apparatus described above and the coil manufacturing method according to the first embodiment of the present invention will be described.

As shown in FIG. 3, first, a wire is taken out from each of a large number of bobbins 1, and each wire is
Through the corresponding holes of the primary converging plate 3 through a and 2b. Similarly, each wire passing through each hole of the primary converging plate 3 is passed through a corresponding hole of the secondary converging plate 4. At this time,
The taking-out of the wires from each bobbin 1 is controlled so that each wire is pulled and tensioned so that each wire does not become entangled with another wire.

Next, a number of strands converged by the secondary converging plate 4 are guided into the alcohol impregnating device 5 and impregnated with alcohol. Then, the adhesive covering the outer surface of each converged strand is melted with alcohol. By the way, as described above, the through-hole 5a in the alcohol impregnation device 5
Is larger than the cross-sectional area of the through-hole 6a of the square hole converging device 6, and since the adhesive has been melted but has not yet started to be solidified, it was converged in the alcohol impregnating device 5. Each strand runs independently while maintaining a substantially parallel relationship with the other strands.

Each of the converged wires passed through the alcohol impregnating device 5 is guided to a square hole converging device 6 and passed through a through-hole 6a, so that a number of wires are bundled substantially in parallel. Form a line. Then, the square hole convergence device 6
Is heated by the heater 7 to evaporate the alcohol, start to solidify the melted adhesive, and start to fix the converged strands. However, a large number of bundled wires between the square hole converging device 6 and the coil-wound core mold 8 are not completely fixed. That is, a semi-fixed state is set.

Finally, the coiled core mold 8 is used to
a is rotated to wind up a winding wire (a plurality of bundled strands). When the wound wire is wound on the coil wound core mold 8, the wire is slightly semi-fixed because there is a difference in circumference between the wire on the inner circumference side and the wire on the outer circumference side of the coil. The tension between the coil-wound core mold 8 and the bobbin 1 of each wire is controlled so that the wires are slid together, so that the wire is smoothly wound up.

When the winding wire is wound up, the winding wire 1 composed of the converged strands is rotated while the winding core 8a is rotated once.
The winding core 8 is moved so that the traverse moving base 9 is moved in the direction of the right side plate 8c from the beginning of winding of the winding wire by the width of the book.
It is necessary to synchronize the rotation of a with the rotation of the ball screw 10.

The degree of fixation of each strand by the adhesive provided on the outer surface of each strand is as follows: (1) the amount of alcohol, (2) the temperature of the heater 7, (3) The distance is determined by the distance from the coil-wound core mold 8, (4) the rotation speed of the winding core 8a, (5) the ambient temperature of a series of operations, and (6) the tension applied to each strand. ) To make a large number of wires in a semi-fixed state between the square hole converging device 6 and the coil-wound core mold 8, and to establish a substantially parallel relationship between each wire and the other wires. Not to break.

When the wound wire composed of the bundled wires is finally wound up, each wire is completely fixed with an adhesive. By doing so, the shape of the coil can be maintained.

When the coil is manufactured as described above, it is not necessary to make a litz wire in advance, and it is no longer necessary to entangle a plurality of litz wires in advance to form a winding wire.

Regarding the removal of the manufactured coil, the coil inner diameter mold 8b has a four-part structure,
Since there is a slight gap between each of them, by removing the right side plate 8c from the coil wound core mold 8, the coil inner diameter mold 8 is removed.
Since b has a small diameter, the coil can be easily removed from the coil wound core mold 8.

In the first embodiment, the primary convergence plate 3 and the secondary convergence plate 4 are used as convergence means for converging the wires from each of the plurality of bobbins 1. A large number of converging plates having the same role as the third converging plate 4 and the second converging plate 4 may be prepared to converge the strands. In short, the convergence means is not limited to the primary convergence plate 3 and the secondary convergence plate 4, and the number is not limited as long as it has the same role.

In the first embodiment, the bobbin 1 is used as an example of the control means for controlling the tension of the wire. However, the control means is not limited to the bobbin 1, but is separately provided in addition to the bobbin 1. It may be provided, or may use the bobbin 1. As an example of the control means provided other than the bobbin 1, there is a tension device as shown in FIG. 10, and the tension device is installed between the primary converging plate 3 and the secondary converging plate 4, and the pressing force of the cylinder 100a is set. By reducing the pressing force of the cylinder 100b, the tension of the wire on the upper side of the strand (the outer diameter side of the coil) can be reduced. Note that FIG.
FIG. 10A is a front view of the tension device, and FIG.
FIG. 3 is a side view of the tension device.

In the first embodiment described above, the adhesive is heated by the heater 7 provided at the outlet of the square hole converging device 6. However, the heater 7 is not provided, and hot air is blown from the outside to apply the adhesive. It may be heated.

In the first embodiment, the primary convergence plate 3 and the secondary convergence plate 4 are mounted on the traverse moving table 9. Good.

In the first embodiment described above, the winding wire section is square, but the winding wire section is not limited to a square shape. Also, the cross-sectional shape of each element wire is not limited to a circle, and may be, for example, a flat angle. Other shapes may be used. Further, the shape of the inner diameter of the coil is not limited to a circle, but may be a square or other shapes.

Further, in the above-described first embodiment, as shown in FIG. 1, a cylindrical single-layer coil has been described. However, as described above, a plurality of element wires are converged and wound substantially in parallel. By forming the wire, it is also possible to manufacture a coil such as a multilayer coil as shown in FIG. That is, a cylindrical coil formed by winding a plurality of wires, such as a multilayer coil as shown in FIG. 11, wherein each of the plurality of wires is not entangled and has a cross-section. That is, coils that are bundled so as to be planar also belong to the present invention.

(Embodiment 2) Next, the configuration of a coil manufacturing apparatus according to Embodiment 2 of the present invention will be described together with a coil manufacturing method. The structure of the coil manufactured by the coil manufacturing apparatus and the manufacturing method according to the second embodiment is the same as that according to the first embodiment.
Are the same as those described with reference to FIGS. 1 and 2, but the manufacturing apparatus and the manufacturing method are different from those of the first embodiment. The manufacturing method will be described.

FIG. 12 shows a configuration of a coil manufacturing apparatus according to the second embodiment of the present invention. As shown in FIG. 12, the coil manufacturing apparatus according to the second embodiment is different from the coil manufacturing apparatus according to the first embodiment described with reference to FIGS. 3 and 4 in that the alcohol impregnating apparatus 5 and the heater 7 are removed. This is different from the coil manufacturing apparatus of the first embodiment in that the coil-wound core mold 8 is replaced by the coil-wound core mold 13 and that the yoke 14 is provided.

In the first embodiment, the wire wound on the bobbin 1 is a wire whose outer surface is coated with an adhesive, but in the second embodiment, the outer surface is coated with an adhesive. Use an untreated strand. Thus, Embodiment 2
Since the adhesive is not provided on the outer surface of the wire used in the method described above, it is not necessary to melt or solidify the adhesive. The device 5 and the heater 7 are not provided.

Now, in the method of manufacturing the coil according to the second embodiment, a wire is taken out from each of a large number of bobbins 1, and the wire is converged using a primary converging plate 3 and a secondary converging plate 4. Until it is introduced into the square hole converging device 6, taken out of the square hole converging device 6, and guided to the coil wound core mold 13, the fact that the element wire does not pass through the alcohol impregnating device 5 and is not heated by the heater 7. Except for this, the configuration is the same as that of the first embodiment.

That is, the second embodiment is different from the first embodiment in that the coiled core mold 13 winds up a winding wire composed of bundled element wires. In the second embodiment, the wires introduced into the coil wound core mold 13 are bundled but not bonded. Therefore, it is necessary to wind up the bundled wires so as not to separate them.

FIG. 13 shows the configuration of the coil wound core mold 13. As shown in FIG. 13, the coil-wound core mold 13 includes:
A right bush 13a provided with a groove 130;
Inner diameter mold 1 provided with left bush 13c
3b, a second left bush 13d, and a tapered plate 13e.
And a taper plate fastening bolt 13f. First left bush 13c and second left bush 1
3d is a two-sided parallel C ring, but the right bush 13a
Is provided with a step having a width corresponding to one bundled element wire, that is, a winding wire from the square hole converging device 6, and a through hole at the center.

Next, the assembly of the coil wound core mold 13 will be described with reference to FIG. First, coil inner diameter mold 1
3b and the opening of the second left bush 13d together with the opening of the first left bush 13c, and
The second left bush 13d is set to 3b. Next, a tapered plate 13e is formed on the tapered portion of the coil inner diameter mold 13b.
Is attached with a taper plate fastening bolt 13f.

Then, the right bush 13a with the ball spline bearing (non-rotating mechanism) is inserted from the tapered portion side of the coil inner diameter mold 13b, and the bolt 13g is inserted.
Fix with. Thereafter, the yoke 14 is attached to the groove 130 of the right bush 13a, and the yoke 14 is also fixed to the traverse carriage 9 so that the traverse of the traverse carriage 9 and the movement of the right bush 13a are linked.

Next, the traverse moving table 9 is moved to a winding start position of the winding wire. Then, the bundled lines from the square hole convergence device 6 are bent substantially at right angles to the first left bush 13c side, and fixed to the ring cut portions of the first left bush 13c and the second left bush 13d. .
The illustration of the fixing means is omitted. Then, the first left bush 13c and the second left bush 13d are rotated to draw the bundled wire into the coil-wound core mold 13, and the traverse slide 9 is moved to the first left bush 13c.
To the right bush 13a.

Here, the movement of the right bush 13a is linked with the traverse of the traverse slide 9 by the yoke 14, and the right bush 13a is not rotated by the ball spline bearing (non-rotating mechanism). As a result, the winding wire drawn into the coil-wound core mold 13 by the rotation of the first left bush 13c and the second left bush 13d is wound up by the coil-wound core mold 13.

Further, since the right bush 13a is provided with a step, the final side surface of the winding wire lastly wound on the coil-wound core mold 13 always faces the first left bush 13c by the right bush 13a. Since the wire is pressed, the wound wire, which is a bundled wire, can be wound up without breaking.

Then, a tape is attached to the outer periphery of the coil formed by the finally wound wire, and the final wound wire after the formation of the wound wire is subjected to a springback measure with a bond (registered trademark) or the like. Secure the lead wire at the end of winding and cut the strand. Preferably, the tape is attached to the entire outer periphery of the coil. Further, the tape may be manually pasted, or may be automatically pasted after the winding wire is finally wound up by using a means for automatically pasting the tape.

Finally, the taper plate tightening bolt 13f of the coil wound core mold 13 is loosened from the right hole of the right bush 13a, and the coil inner diameter mold 13b is formed by the tapered shape of the coil inner diameter mold 13b and the gap of four divisions. , The yoke 14 and the right bush 13a are detached from the coil inner diameter mold 13b, and a coil formed of a winding having a number of strands substantially parallel to each other is taken out.

As described above, even if a wire which is not coated with an adhesive is used, it is possible to manufacture a coil in which a large number of wires are formed by winding wires having a substantially parallel relationship with each other.

[0063]

As is clear from the above description, the present invention has a high accuracy of the outer diameter, a small space loss, a high space factor, a small size, and a small coil resistance value. A lighter weight coil can be provided.

The present invention also relates to a method for manufacturing a coil,
A coil manufacturing method and a coil manufacturing apparatus for manufacturing a coil without forming a litz wire in advance and without tying a plurality of litz wires in advance can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a cylindrical single-layer coil according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a winding forming the coil according to the first embodiment of the present invention.

FIG. 3 is a front view of the coil manufacturing apparatus according to the first embodiment of the present invention.

FIG. 4 is a plan view of the coil manufacturing apparatus according to the first embodiment of the present invention.

FIG. 5 is a configuration diagram of a primary converging plate 3 of the coil manufacturing apparatus according to the first embodiment of the present invention.

FIG. 6 is a configuration diagram of a secondary converging plate 4 of the coil manufacturing apparatus according to the first embodiment of the present invention.

FIG. 7 is an explanatory diagram of an alcohol impregnating device 5 of the coil manufacturing device according to the first embodiment of the present invention.

FIG. 8 is an explanatory diagram of a heater 7 and a square hole converging device 6 of the coil manufacturing apparatus according to the first embodiment of the present invention.

FIG. 9 is an explanatory diagram of a coil wound core mold 8 of the coil manufacturing apparatus according to the first embodiment of the present invention.

FIG. 10 is a configuration diagram of a tension device that controls the tension of each strand in the first embodiment of the present invention.

FIG. 11 is a configuration diagram of a cylindrical multilayer coil according to the first embodiment of the present invention.

FIG. 12 is a plan view of the coil manufacturing apparatus according to the second embodiment of the present invention.

FIG. 13 is a configuration diagram of a wound core mold of the coil manufacturing apparatus according to the second embodiment of the present invention.

FIG. 14 is a configuration diagram of a conventional cylindrical single-layer coil.

FIG. 15 is a configuration diagram of a conventional cylindrical multilayer coil.

FIG. 16 is an explanatory diagram of a litz wire.

FIG. 17 is a cross-sectional view of a conventional coil winding.

[Explanation of symbols]

 Reference Signs List 1 bobbin 2a, 2b rotating roller 3 primary convergence plate 4 secondary convergence plate 5 alcohol impregnating device 5a through hole 6 square hole convergence device 6a through hole 7 heater 8 coil wound core mold 8a wound core 8b coil inner diameter type 8c right side plate 9 Traverse slide 10 Ball screw 11 Shaft axis 12 Winding machine base

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01F 17/02 H01F 17/02 27/32 27/32 Z 41/06 41/06 A

Claims (11)

[Claims] 1. A tubular coil formed of a winding having a predetermined thickness, wherein the winding is a bundle of a plurality of strands, and each of the plurality of strands is A coil which is bundled without being entangled and having a planar cross section. 2. The coil according to claim 1, wherein the wires are covered with an insulating material. 3. The winding wire in which a plurality of the element wires are bundled is coated with an insulating material.
Coil. 4. A wire is taken out from each of a plurality of bobbins around which predetermined wires are wound, and the wires are bundled without being entangled and having a planar cross section. A method for manufacturing a coil, comprising winding the bundled element wires with a predetermined winding core to manufacture a coil. 5. When winding up the plurality of wires bundled by the winding core, the tension between the bobbin and the winding core of each of the plurality of wires is adjusted from the central axis of the winding core. The method according to claim 4, wherein the control is performed according to the distance of the coil. 6. An outer surface of each of the strands wound in the bobbin is coated with a predetermined adhesive, and after winding the plurality of strands bundled by the winding core, The method for manufacturing a coil according to claim 4, wherein the plurality of bundled strands are fixed with the adhesive. 7. The outer surface of each of the strands wound on the bobbin is not coated with an adhesive, and when the plurality of strands bundled by the winding core are wound up, winding is started. The method according to claim 4, wherein the winding is performed while fixing the wire and pressing the bundled wire which is subsequently wound on the winding start side in the center axis direction of the winding core. 6. The method for manufacturing a coil according to 5. 8. A bobbin on which a plurality of predetermined wires are wound, and a plurality of the wires from each of the plurality of bobbins are not entangled and have a planar cross section. One or more converging means in which a plurality of holes are provided at predetermined intervals in a plate-shaped member, and winding up the plurality of strands bundled by the converging means. And a winding core for the coil. 9. A control for controlling the tension between the bobbin and the winding core of each of the plurality of wires wound by the winding core according to a distance from a center axis of the winding core. 9. The apparatus for manufacturing a coil according to claim 8, further comprising means. 10. The outer surface of each of the strands wound on the bobbin is coated with a predetermined adhesive, and the adhesive is disposed between the converging means and the winding core. The coil manufacturing apparatus according to claim 8, further comprising: a melting unit configured to melt the adhesive; and a heating unit configured to heat the melted adhesive. 11. An outer surface of each of the strands wound on the bobbin is not coated with an adhesive, and a fixing means for fixing a beginning of winding of the strand wound on the winding core; The bundled element wire wound after the element wire fixed by the fixing means is for pressing the element wire on the winding start side, and a predetermined step is provided on the winding start side. The coil manufacturing apparatus according to claim 8, further comprising: a pressing unit provided; and a moving unit configured to move the pressing unit in a direction of a center axis of the winding core.