JP2023007365A - Square cross section multicore insulated wire, and its manufacturing method - Google Patents

Abstract

To provide a square cross section multicore insulated wire of construction having a constitution excellent in insulation property, capable of applying to a coil in a non-contact charger, and combining flexibility and shape stability.SOLUTION: A square cross section multicore insulated wire 1 has a cluster of wires 2 in which an insulating layer 2b is formed on an outer periphery of a conductor 2a, and has a composite twist structure formed of a first stranded wire 21, a second stranded wire 22, a third stranded wire 23 and a fourth stranded wire 24, an insulating fiber thread 3 is wound around an outer periphery, and the cross section is formed into a rectangular shape, and a winding direction of the fiber thread 3 is the opposite direction of the twist direction of the outermost twisted wire in the cluster of wires 2.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a square cross-section multicore insulated wire and a manufacturing method thereof.

Conventionally, there has been proposed a configuration in which an assembly of strands is compression-molded into a square and provided with an insulating layer (Patent Document 1: Japanese Patent Application Laid-Open No. 59-096605). Further, a structure has been proposed in which a litz wire is compression molded into a rectangular shape, a glass thread is wound around the periphery, and the strands are bound with a synthetic resin (Patent Document 2: Japanese Utility Model Publication No. 63-006815). A method has been proposed in which a plurality of strands are twisted together and drawn into a rectangular shape to form an insulation layer by extrusion coating (Patent Document 3: Japanese Patent Application Laid-Open No. 2009-245658).

Japanese Patent Application Laid-Open No. 59-096605 Japanese Utility Model Publication No. 63-006815 JP 2009-245658 A

When an insulated wire is applied to a coil in a non-contact charging device such as an electric device, an electric motor, or an automobile, flexibility (suppleness) that can follow when it is bent into a desired shape is required. However, in the prior art, the insulation layer extruded and the binding resin intervening make the whole hard, and it is difficult to bend it into a desired shape. On the other hand, since an assembly of a large number of strands is likely to fray, it is difficult to maintain its shape unless a binding resin or the like is used.

The present invention has been made in view of the above circumstances, and has a square cross-section multi-core structure having both flexibility and shape stability that is excellent in insulation performance and can be applied to a coil in a non-contact charging device. The purpose is to provide an insulated wire.

In one embodiment, the solution disclosed below solves the above problems.

A square cross-section multicore insulated wire according to the present invention has an assembly of strands in which an insulating layer is formed on the outer periphery of a conductor, and the assembly of strands is a first strand obtained by twisting the strands. It is a composite twisted structure having a wire, a second twisted wire obtained by twisting the first twisted wire, and a third twisted wire obtained by twisting the second twisted wire, and an insulating fiber yarn is wound around the outer circumference. , the cross section is formed in a rectangular shape, and the winding direction of the fiber yarn is opposite to the twisting direction of the outermost twisted wire in the assembly of the strands.

According to this configuration, flexibility (suppleness) capable of following bending can be obtained by the composite twisted structure having the first, second, and third twisted wires. In addition, since the winding direction of the fiber thread is opposite to the twisting direction of the outermost twisted wire in the assembly of strands, the fiber thread can be covered without biting into between the strands. Furthermore, the fiber thread receives the external force during the rectangular shape molding, thereby protecting the internal assembly of the wire strands and preventing the assembly of the wire strands from fraying.

As an example, the number of first strands constituting the first twisted wire among the number of strands is equal to or greater than the number of second strands constituting the second twisted wire among the number of strands. and the number of said second strands constituting said second twisted wire out of said number of strands is equal to or greater than the number of said third strands constituting said third twisted wire out of said number of strands It is a configuration that According to this configuration, even higher flexibility (suppleness) can be obtained. As an example, the number of first strands constituting the first twisted wire among the number of strands is larger than the number of second strands constituting the second twisted wire among the number of strands. , the number of said second strands constituting said second twisted wire out of said number of strands is larger than the number of said third strands constituting said third strand out of said number of strands be. As an example, the twist pitch is such that the first pitch of the first twisted wire is smaller than the second pitch of the second twisted wire, and the second pitch of the second twisted wire is smaller than the third pitch of the third twisted wire. is. With this configuration, fraying can be prevented, so that the rectangular shape of the assembly can be easily maintained.

As an example, the conductor is made of copper or a copper alloy, and the insulating layer is made of polyurethane. As a result, a structure having high conductivity and excellent solderability can be obtained. As an example, the fiber thread is made of polyester. This makes it easier to spread the insulating resin when applying it to the coil and impregnating it with the insulating resin, so that high adhesiveness can be obtained. As an example, the number of strands is 2000 or more. As a result, even higher flexibility can be obtained, and a structure having excellent current-carrying characteristics in a high frequency band can be obtained. As an example, the number of strands is 4000 or less. As a result, it is possible to ensure the necessary bending strength when applying to a coil while increasing the space factor of the conductor.

As an example, the assembly of the strands has a composite twist structure including the first twisted wire, the second twisted wire, the third twisted wire, and the fourth twisted wire. The twist directions of the two strands, the third strand and the fourth strand are all in the first direction, and the winding direction of the fiber yarn is opposite to the first direction. As an example, the square cross-section multicore insulated wire has an assembly of strands in which an insulating layer is formed on the outer periphery of a conductor, and the assembly includes a first twisted wire obtained by twisting the strands and the A composite twisted structure composed of a second twisted wire obtained by twisting the first twisted wire, a third twisted wire obtained by twisting the second twisted wire, and a fourth twisted wire obtained by twisting the third twisted wire, and is insulated A fiber yarn of the same type is wound around the outer circumference, and the cross section is formed into a rectangular shape, and the twisting directions of the first strand, the second strand, the third strand, and the fourth strand are Both are in the first direction, and the winding direction of the fiber thread is opposite to the first direction. This configuration provides even greater flexibility.

As an example, the assembly of the strands has a composite twist structure including the first twisted wire, the second twisted wire, the third twisted wire, and the fourth twisted wire. The twisting directions of the two twisted wires and the third twisted wire are both the second direction, the twisting direction of the fourth twisted wire is the opposite direction of the second direction, and the winding direction of the fiber yarn is the second direction. is the direction. As an example, the square cross-section multicore insulated wire has an assembly of strands in which an insulating layer is formed on the outer periphery of a conductor, and the assembly includes a first twisted wire obtained by twisting the strands and the A composite twisted structure composed of a second twisted wire obtained by twisting the first twisted wire, a third twisted wire obtained by twisting the second twisted wire, and a fourth twisted wire obtained by twisting the third twisted wire, and is insulated A flexible fiber thread is wound around the outer circumference, the cross section is formed into a rectangular shape, and the twisting directions of the first twisted wire, the second twisted wire, and the third twisted wire are all in the second direction. A twisting direction of the fourth twisted wire is opposite to the second direction, and a winding direction of the fiber thread is the second direction. This configuration provides even higher shape stability.

A method for manufacturing a square cross-section multicore insulated wire according to the present invention uses a strand having an insulating layer formed on the outer periphery of a conductor, and a first strand made by twisting the strand and the first strand. a second twisted wire and a third twisted wire obtained by twisting the second twisted wire; first, in the direction opposite to the twisting direction of the outermost twisted wire in the assembly of the strands, and then the cross section is formed into a rectangular shape. The method for manufacturing the square cross-section multicore insulated wire includes twisting strands having an insulating layer formed on the outer periphery of a conductor to form a first strand in a first direction, and twisting the first strand in the first direction. Twisting to form a second stranded wire, twisting the second stranded wire in the first direction to form a third stranded wire, and twisting the third stranded wire in the first direction to form a fourth stranded wire is a composite twist An insulative fiber thread is wound around the outer circumference of the assembly in the direction opposite to the first direction, and then the cross section is formed into a rectangular shape.

According to this configuration, it is possible to obtain flexibility (suppleness) that can follow bending when applied to a coil. Moreover, the fiber thread can be covered without biting into between the filaments. Furthermore, it is possible to protect the assembly of the wires inside from the external force when forming into a rectangular shape and prevent the assembly of the wires from fraying.

According to the present invention, it is possible to realize a rectangular cross-section multi-core insulated wire that has excellent insulation performance, is applicable to a coil in a non-contact charging device, and has both flexibility and shape stability. .

FIG. 1 is a structural diagram schematically showing the structure of a multi-core insulated wire having a square cross section according to an embodiment of the present invention. 2A is a diagram schematically showing strands in the example of the square cross-section multicore insulated wire shown in FIG. 1, and FIG. 2B is a diagram showing a state in which the strands in FIG. 2A are twisted to form a first stranded wire. FIG. 2C is a diagram showing a state in which the first stranded wire in FIG. 2B is twisted to form a second stranded wire. 3A is a diagram showing a state in which the second strand in FIG. 2C is twisted to form a third strand, and FIG. 3B shows a state in which the third strand in FIG. 3A is twisted to form a fourth strand. FIG. 3C is a diagram showing a state in which the fourth twisted wire in FIG. 3B is covered with fiber threads; 4A is a diagram schematically showing strands in another example of the square cross-section multicore insulated wire shown in FIG. 1, and FIG. 4B shows a state in which the strands in FIG. 4A are twisted to form a first stranded wire. FIG. 4C is a diagram showing a state in which the first stranded wire in FIG. 4B is twisted to form a second stranded wire. 5A is a diagram showing a state in which the second strand in FIG. 4C is twisted to form a third strand, and FIG. 5B shows a state in which the third strand in FIG. 5A is twisted to form a fourth strand. FIG. 5C is a diagram showing a state in which the fourth twisted wire in FIG. 5B is covered with fiber threads; FIG. 6 is a diagram showing a coiled state of the multi-core insulated wire of square cross section shown in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The square cross-section multi-core insulated wire 1 of the present embodiment is applied, as an example, to a coil in a non-contact charging device such as an electric device, an electric motor, or an automobile. In addition, in all drawings for describing the embodiments, members having the same functions are denoted by the same reference numerals, and repeated description thereof may be omitted.

As shown in FIG. 1, a square cross-section multicore insulated wire 1 has an assembly of strands 2 in which an insulating layer 2b is formed on the outer periphery of a conductor 2a. , a third twisted wire 23 and a fourth twisted wire 24, and an insulating fiber yarn 3 is wound around the outer circumference, and the cross section is formed into a rectangular shape, and the fiber yarn 3 The winding direction is opposite to the twisting direction of the outermost twisted wire in the assembly of the strands 2 .

The conductor 2a forming the wire 2 is a solderable conductive conductor, and is made of, for example, copper or a copper alloy. The insulating layer 2b is an insulating film that has excellent insulating properties and does not interfere with soldering, and is made of, for example, polyurethane or polyester. An enameled wire can be applied to the wire 2 . The insulating fiber thread 3 is a covering thread and is selected from polyester thread, acrylic thread, polypropylene thread and polyurethane thread, for example. The material of the fiber thread 3 can be appropriately set according to the application.

A square cross-section multicore insulated wire 1 has an assembly of strands 2 covered with fiber yarns 3 to protect and insulate from the outside. As shown in FIG. 1, the assembly of wires 2 has a rectangular cross section. In the example of FIG. 1, the twisting direction of the fourth twisted wire 24 is the first direction v1, and the winding direction of the fiber thread 3 is the second direction v2 opposite to the twisting direction. Here, the first direction v1 and the second direction v2 indicate a relative relationship. It may be the second direction v2 opposite to the direction. For example, the twisting direction is right-hand twist or S-twist, and the winding direction of the fiber thread 3 is left-hand. Further, for example, the twist direction is left-hand twist or Z-twist, and the winding direction of the fiber yarn 3 is right-hand twist. As an example, the apparatus for manufacturing the square cross-section multicore insulated wire 1 is installed in the order of a twisting apparatus, a forming apparatus, and a winding apparatus from the upstream side.

Next, a first example of the square cross-section multicore insulated wire 1 and its manufacturing procedure will be described below.

[First example]
As shown in FIG. 2A, a strand 2 comprising a conductor 2a made of copper or copper alloy and an insulating layer 2b made of polyurethane or polyester is used. Then, as shown in FIG. 2B, 7 or more and 21 or less strands 2 are twisted in the first direction v1 to form a first twisted wire 21 . The length in the longitudinal direction that the first wire of the strands 2 makes one round is the first pitch P1. Next, as shown in FIG. 2C, three or more and nine or less first stranded wires 21 are twisted in the first direction v1 to form a second stranded wire 22 . The length of the first wire of the first twisted wire 21 in the longitudinal direction is the second pitch P2. Next, as shown in FIG. 3A, three or more and seven or less second stranded wires 22 are twisted in the first direction v1 to form a third stranded wire 23 . The length in the longitudinal direction of the first wire of the second twisted wire 22 is the third pitch P3. Next, as shown in FIG. 3B, three or more and seven or less third twisted wires 23 are twisted in the first direction v1 to form a fourth twisted wire 24 . The length of the first wire of the fourth twisted wire 24 in the longitudinal direction is the fourth pitch P4. Then, as shown in FIG. 3C, the insulating fiber thread 3 is wound around the outer circumference of the fourth twisted wire 24 in a second direction v2 opposite to the first direction v1. After that, the multicore insulated wire 1 with a square cross section is formed by sandwiching it between rollers of a forming device and forming the cross section into a rectangular shape. Then, the molded rectangular cross-section multicore insulated wire 1 is wound on a drum.

Next, a second example of the square cross-section multicore insulated wire 1 and its manufacturing procedure will be described below.

[Second example]
As shown in FIG. 4A, a strand 2 comprising a conductor 2a made of copper or copper alloy and an insulating layer 2b made of polyurethane or polyester is used. Then, as shown in FIG. 4B , 7 or more and 21 or less strands 2 are twisted in the second direction v2 to form a first twisted wire 21 . Next, as shown in FIG. 4C , three or more and nine or less first stranded wires 21 are twisted in the second direction v2 to form a second stranded wire 22 . Next, as shown in FIG. 5A , three or more and seven or less second twisted wires 22 are twisted in the second direction v2 to form a third twisted wire 23 . Next, as shown in FIG. 5B, three or more and seven or less third twisted wires 23 are twisted in the first direction v1 to form a fourth twisted wire 24 . Then, as shown in FIG. 5C, the insulating fiber thread 3 is wound around the outer periphery of the fourth twisted wire 24 in a second direction v2 opposite to the first direction v1. After that, the multicore insulated wire 1 with a square cross section is formed by sandwiching it between rollers of a forming device and forming the cross section into a rectangular shape. Then, the molded rectangular cross-section multicore insulated wire 1 is wound on a drum.

The first example above is co-directional laying and the second example is rope laying. In the first and second examples, the twisting direction of the fourth twisted wire 24 is the first direction v1, and the winding direction of the fiber thread 3 is the second direction v2. Here, the first direction v1 and the second direction v2 indicate a relative relationship. It may be the second direction v2 opposite to the direction.

Table 1 below shows each example of the square cross-section multicore insulated wire 1 .

Next, examples of the square cross-section multicore insulated wire 1 according to the present embodiment will be described below.

The manufacturing method of the square cross-section multicore insulated wire 1 is as described above. The wire 2 is composed of a conductor 2a and an insulating layer 2b. The conductor 2a is made of copper wire or copper alloy wire with a diameter of 0.1 mm. The insulating layer 2b is made of polyurethane or polyester with a thickness of 9 μm on one side in the radial direction. The textile yarn 3 consists of 6 polyester yarns of 110 decitex. Fourteen wires 2 are twisted in the first direction v1 at a first pitch P1 of 25 mm to form a first twisted wire 21. - 特許庁Next, the six first twisted wires 21 are twisted in the first direction v1 at a second pitch of 45 mm to form a second twisted wire 22 . Next, five second twisted wires 22 are twisted in the first direction v1 at a third pitch of 85 mm to form a third twisted wire 23 . Next, five third twisted wires 23 are twisted in the first direction v1 at a fourth pitch of 115 mm to form a fourth twisted wire 24 . Then, the fiber yarn 3 is wound around the outer circumference of the fourth twisted wire 24 in the second direction v2. After that, it is clamped between rollers of a forming device and shaped into a rectangular cross-section to form a square cross-section multicore insulated wire 1 . A plurality of rollers are provided.

As an example, the square cross-section multicore insulated wire 1 is used by being bent into a coil shape as shown in FIG. Also, if necessary, it is cut to a desired length, and terminal processing such as soldering, fusing, or terminal attachment is performed. According to the present embodiment described above, it is possible to achieve both flexibility (suppleness) capable of following bending and shape stability. Moreover, the fiber thread can be covered without biting into between the filaments. Furthermore, it is possible to protect the assembly of the wires inside from the external force when forming into a rectangular shape and prevent the assembly of the wires from fraying.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the present invention.

1 square cross-section multicore insulated wire 2 element wire 2a conductor 2b insulating layer 3 fiber thread 21 first twisted wire 22 second twisted wire 23 third twisted wire 24 fourth twisted wire v1 first direction v2 second direction

Claims (6)

An assembly of wires in which an insulating layer is formed on an outer periphery of a conductor, and the assembly of wires includes a first twisted wire obtained by twisting the wires and a second twisted wire obtained by twisting the first twisted wires. It has a composite twisted structure having two twisted wires and a third twisted wire obtained by twisting the second twisted wire, an insulating fiber thread is wound around the outer periphery, and the cross section is formed into a rectangular shape, A square cross-section multicore insulated wire, wherein the winding direction of the fiber thread is opposite to the twisting direction of the outermost twisted wire in the assembly of the strands. The assembly of the strands has a composite twist structure composed of the first twisted wire, the second twisted wire, the third twisted wire, and the fourth twisted wire, and the first twisted wire and the second twisted wire 2. The twisting direction of the third twisted wire and the fourth twisted wire are both the first direction, and the winding direction of the fiber yarn is opposite to the first direction. square cross-section multi-core insulated wire. The assembly of the strands has a composite twist structure composed of the first twisted wire, the second twisted wire, the third twisted wire, and the fourth twisted wire, and the first twisted wire and the second twisted wire , the twisting direction of the third twisted wire is the second direction, the twisting direction of the fourth twisted wire is opposite to the second direction, and the winding direction of the fiber yarn is the second direction. 2. The multi-core insulated wire having a rectangular cross section according to claim 1, characterized in that: The number of first strands constituting the first twisted wire among the number of strands is equal to or greater than the number of second strands constituting the second strand among the number of strands, and The number of said second strands constituting said second twisted wire out of the number of strands is equal to or greater than the number of third strands constituting said third twisted wire out of said number of strands. The rectangular cross-section multicore insulated wire according to any one of claims 1 to 3. 5. The conductor according to any one of claims 1 to 4, wherein the conductor is made of copper or a copper alloy, the insulating layer is made of polyurethane, the fiber thread is made of polyester, and the number of strands is 2000 or more. The square cross-section multi-core insulated wire according to item 1. Using a strand having an insulating layer formed on the outer circumference of a conductor, a first strand made by twisting the strands, a second strand made by twisting the first strand, and the second strand are twisted. and a third twisted wire having a composite twist structure, and an insulating fiber yarn is twisted around the outer periphery of the assembly of the strands. A method for manufacturing a square cross-section multicore insulated wire, characterized by winding the wire in the opposite direction, and then forming the cross section into a rectangular shape.

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