JP2009205982A - Conductor and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conductor in which heat radiating performance and work efficiency of terminal treatment of electric wire are improved, and to provide a manufacturing method thereof. <P>SOLUTION: The conductor 10 includes a metal pipe 11, a plurality of electric wires 12 passed through the pipe 11, and a holding member 13 which is passed through the pipe 11 and holds the electric wires 12 in the pipe 11. The holding member 13 is a separate member from the electric wires 12, is made of a synthetic resin or rubber having a thermal conductivity higher than that of air, houses the electric wires 12, and also includes a groove 16 for holding the electric wires 12 in the state that at least a part of the outer peripheral surface of the electric wires 12 is brought into contact with the inner peripheral surface of a pipe 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a conductor and a method for manufacturing the conductor.

Conventionally, a structure in which a plurality of electric wires are inserted into a metal pipe is known (see Patent Document 1). According to this structure, since the shield pipe exhibits the function of shielding the electric wire and the function of protecting the electric wire, in order to protect the electric wire and the shield member, compared to a shield conductor in which a protector is separately provided, There is an advantage that the number of parts is small.
JP 2004-171952 A

  According to said structure, the heat which generate | occur | produced from the electric wire at the time of electricity supply is confined in the space between an electric wire and a pipe, and it becomes easy to raise the temperature of an electric wire. Since the amount of heat generated from the electric wire decreases as the cross-sectional area of the electric wire increases, it is conceivable to increase the cross-sectional area of the electric wire in order to reduce the temperature rise value of the electric wire. However, this method cannot be employed because the shield conductor inevitably increases in size.

  Therefore, a configuration is conceivable in which a plurality of electric wires are molded with a synthetic resin having a thermal conductivity higher than that of air to form a so-called cabtire cable, and the cabtire cable is inserted into a pipe. According to this method, the heat generated from the electric wire during energization is transmitted to the pipe via the synthetic resin and is dissipated from the pipe to the outside. As a result, since heat does not accumulate between the electric wire and the pipe, the heat dissipation of the shield conductor can be improved.

  However, according to said structure, when performing the terminal process of an electric wire, it is necessary to peel off the synthetic resin of a cabtire cable. Since this synthetic resin is formed integrally with the electric wire by molding, it is quite difficult to separate the electric wire and the synthetic resin. For this reason, there exists a problem that the work efficiency of the terminal process of an electric wire falls.

  The present invention has been completed based on the above circumstances, and provides a conductor and a method for manufacturing a conductor that improve heat dissipation and work efficiency of terminal processing of electric wires. Objective.

  The present invention is a conductor comprising a metal pipe, a plurality of electric wires inserted through the pipe, and a holding member inserted into the pipe to hold the electric wire in the pipe. The holding member is a member separate from the electric wire, and is made of a synthetic resin or rubber having a thermal conductivity larger than that of air. The holding member accommodates the electric wire and at least a part of the outer peripheral surface of the electric wire inside the pipe. It has the groove | channel which hold | maintains the said electric wire in the state contacted with the surrounding surface.

  The present invention is also a method of manufacturing a conductor in which a plurality of electric wires are accommodated in a metal pipe, which is made of synthetic resin or rubber having a thermal conductivity higher than that of air and accommodates the plurality of electric wires. A holding step of holding the electric wire in the holding member by accommodating the electric wire in the groove of the holding member provided with the groove, and the holding member holding the electric wire in the pipe. And an insertion step of inserting in a state in which at least a part of the outer peripheral surface of the pipe is in contact with the inner peripheral surface of the pipe.

  According to the present invention, heat generated from the electric wire during energization is transmitted from the electric wire to the holding member via the inner peripheral surface of the groove, and is transmitted from the holding member to the pipe. The heat transferred to the pipe is dissipated from the outer surface of the pipe. For this reason, compared with what has an air layer between an electric wire and a pipe, the heat dissipation of a conductor improves as a whole.

  Furthermore, according to the present invention, since at least a part of the outer peripheral surface of the electric wire is in contact with the inner peripheral surface of the pipe, the heat generated from the electric wire is directly transmitted to the pipe and dissipated from the pipe to the outside. . Thereby, the heat dissipation of a conductor improves further.

  Moreover, according to this invention, when performing the terminal process of an electric wire, after removing an electric wire from a holding member first, what is necessary is just to perform a normal terminal process with respect to an electric wire. Since the electric wire and the holding member are separate members, the electric wire and the holding member can be easily separated. For this reason, compared with what is called a cabtire cable which shape-molded the electric wire with synthetic resin or rubber, the workability of the end processing of an electric wire can be improved as a whole.

The following configuration is preferable as an embodiment of the present invention.
The groove may be formed extending in the extending direction of the holding member.

  The holding step includes a step of accommodating one end portion of the electric wire in one end portion of the groove formed to extend in the extending direction of the holding member, and the electric wire of the holding member is the groove. The step of accommodating the electric wire in the groove by pushing the electric wire into the groove from one end of the groove to the other end with the end portion on the side accommodated in the groove fixed And may be included.

  According to said structure, the one end part of an electric wire is accommodated in the groove | channel on the one end part side of a holding member, and an electric wire can be easily attached by squeezing an electric wire and a holding member to the other end part side after that. It can be accommodated in the groove.

  A plurality of ribs extending along the extending direction of the holding member may be provided on the outer peripheral surface of the holding member.

  When the frictional force between the inner peripheral surface of the pipe and the outer peripheral surface of the holding member is large, there is a concern that the efficiency of the insertion operation of the holding member is reduced.

  According to said structure, the internal peripheral surface of a pipe contacts the rib formed in the outer peripheral surface of a holding member. Thereby, the contact area of a pipe and a holding member can be made small. As a result, since the frictional force between the inner peripheral surface of the pipe and the outer peripheral surface of the holding member can be reduced, the efficiency of the operation of inserting the holding member into the pipe can be improved.

  Each said electric wire may be hold | maintained with the attitude | position twisted mutually by the said holding member.

  Moreover, after performing the said insertion process, you may perform the twisting process which makes each said electric wire twisted mutually by twisting the said holding member.

  If the pipe is bent while the wires held by the holding member are not twisted, the length of the wire located on the inner circumference side of the bent part and the outer circumference side of the bent part There is a difference (so-called circumference difference) between the length of the electric wires to be performed. Specifically, it is necessary to set the length of the electric wire positioned on the outer peripheral side of the bent portion longer than that of the electric wire positioned on the inner peripheral side of the bent portion.

  According to this structure, each electric wire is hold | maintained with the attitude | position twisted mutually by the holding member. For this reason, in the portion where the pipe is bent, each electric wire is not held in a state of being fixed to either the inner peripheral side or the outer peripheral side position of the bent portion. As a result, each electric wire can absorb the inner and outer circumference difference in the bent portion of the pipe, and therefore it is possible to suppress the occurrence of the circumference difference between the electric wires.

  After performing the insertion step, after performing a fixing step of fixing either one of the ends of the pipe and the holding member exposed from the one end by a fixing means, You may perform the said twisting process by twisting the said holding member located in the other edge part of a pipe.

  According to the above method, first, in the fixing step, one of the ends of the pipe and the holding member exposed from the ends are fixed. Thereby, in a twisting process, what is necessary is just to twist the holding member located in the side by which a pipe and a holding member are not fixed by the fixing means among pipes. As a result, since it is not necessary to hold both ends of the holding member in the twisting process, work efficiency is improved. Moreover, since it is easy to control the frequency | count and grade of a holding member, the pitch of the twist about each electric wire can be controlled easily.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the heat dissipation of a conductor, the work efficiency of the terminal process of an electric wire can be improved.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. The electric conductor 10 according to the present embodiment is arranged between devices (not shown) such as a battery, an inverter, and a motor that constitute a power source for traveling in an electric vehicle, for example, and constitutes a power circuit. The conductor 10 is formed by inserting two electric wires 12 and 12 into a metal pipe 11. The electric wire 12 is held in the pipe 11 by a holding member 13 inserted into the pipe 11.

  As described above, the pipe 11 is made of metal (for example, aluminum alloy, copper alloy, stainless steel, etc.) and has a thermal conductivity higher than that of air. The pipe 11 has both a collective shielding function for the electric wires 12 and a protective function for the electric wires 12. The cross-sectional shape of the pipe 11 is substantially circular.

  The electric wire 12 includes a non-shielded electric wire 12 in which the outer periphery of a core wire 14 made of metal (for example, aluminum, aluminum alloy, copper, or copper alloy) is surrounded by an insulating coating 15 made of synthetic resin. The core wire 14 is composed of a stranded wire obtained by twisting a plurality of thin wires (not shown) in a spiral shape, or a rod-shaped single core wire 14. About the cross-sectional shape of the electric wire 12, both the core wire 14 and the insulation coating 15 are made into circular shape. Moreover, as a material of the insulating coating 15, polypropylene, polyethylene, or the like is used.

  Now, the holding member 13 is formed separately from the electric wire 12. The holding member 13 is made of a synthetic resin having a thermal conductivity higher than that of air (for example, any material such as EPDM or thermoplastic elastomer can be used as necessary), and is elongated and has a cross-sectional shape as a whole. Is generally circular. In the present embodiment, the holding member 13 is made of a flexible material. The outer diameter dimension of the holding member 13 is set to be substantially the same as the inner diameter dimension of the pipe 11. The outer peripheral surface of the holding member 13 is in contact with the inner peripheral surface of the pipe 11.

  On the surface of the holding member 13, two grooves 16, 16 extending in the extending direction of the electric wire 12 are formed to be depressed. The groove 16 is formed at a symmetrical position with respect to the central axis of the holding member 13. The shape of the groove 16 is substantially a part of an arc. The inner diameter dimension of the groove 16 is set to be the same as or slightly smaller than the outer diameter dimension of the electric wire 12. The groove 16 has an opening 17 that opens outward in the radial direction of the holding member 13.

  An electric wire 12 is accommodated in each groove 16. The outer peripheral surface of the insulating coating 15 of the electric wire 12 and the inner peripheral surface of the groove 16 are in contact with each other. The outer peripheral surface of the electric wire 12 is exposed to the outside of the holding member 13 from the opening 17 of the groove 16. A portion of the outer peripheral surface of the electric wire 12 exposed from the opening 17 of the groove 16 is in contact with the inner peripheral surface of the pipe 11.

  Next, an example of the manufacturing process of the conductor 10 will be described. First, the holding member 13 made of a synthetic resin material is formed by extrusion molding.

  Then, the holding process of the electric wire 12 is performed. That is, at one end of the groove 16 of the holding member 13, one end of the electric wire 12 is accommodated in the groove 16 from the opening 17 of each groove 16.

  Subsequently, the end of the holding member 13 on the side where the electric wire 12 is accommodated in the groove 16 is fixed. The end of the holding member 13 may be fixed by a jig (not shown), or an operator may hold the holding member 13.

  In a state where the end of the holding member 13 is fixed, the electric wire 12 is pressed inward in the radial direction of the holding member 13 from one end of the groove 16 to the other end. Push into 16. As a means for pressing the electric wire 12, an operator may squeeze it by hand, or it may be inserted through a die (not shown). Through the above process, the electric wire 12 is pressed inward in the radial direction of the holding member 13, and the groove 16 of the holding member 13 is pressed against the electric wire 12 so as to expand and deform. When the electric wire 12 is further pressed, the groove 16 of the holding member 13 is restored and deformed, and the electric wire 12 is held in a state of being accommodated in the groove 16. In this way, the electric wire 12 is accommodated in the groove 16 from one end of the holding member 13 to the other end. Since the inner diameter of the groove 16 is set to be the same as or slightly smaller than the outer diameter of the electric wire 12, the electric wire 12 is held in the groove 16.

  Next, the holding member 13 holding the electric wire 12 is inserted into the pipe 11 and an insertion process is executed. In addition, you may bend the pipe 11 in the state by which the electric wire 12 and the holding member 13 were inserted after the insertion process. Thus, the conductor 10 is completed.

  When the terminal process is performed on the conductor 10 completed as described above, for example, the following may be performed. First, the electric wire 12 and the holding member 13 are extended from the end of the pipe 11. Then, the electric wire 12 is pulled out from the groove 16 of the holding member 13. Since the holding member 13 and the electric wire 12 are separate members, the electric wire 12 and the holding member 13 can be easily separated as compared with a cabtyre cable formed by molding the outer periphery of the electric wire 12 with a synthetic resin material. After separating the electric wire 12 and the holding member 13, the operator may perform the same terminal processing as that for the normal non-shielded electric wire 12 for the electric wire 12. That is, the core wire 14 may be exposed by peeling off the insulation coating 15 of the electric wire 12.

  According to the present embodiment, heat generated from the electric wire 12 during energization is transmitted from the electric wire 12 to the holding member 13 via the inner peripheral surface of the groove 16, and is transmitted from the holding member 13 to the pipe 11. The heat transferred to the pipe 11 is dissipated from the outer surface of the pipe 11. For this reason, compared with what does not have the holding member 13, the heat dissipation of the conductor 10 improves as a whole.

  Furthermore, according to the present embodiment, since at least a part of the outer peripheral surface of the electric wire 12 is in contact with the inner peripheral surface of the pipe 11, the heat generated from the electric wire 12 is directly transmitted to the pipe 11 and from the pipe 11. Dissipated outside. Thereby, the heat dissipation of the conductor 10 is further improved.

  Moreover, according to this embodiment, when performing the terminal process of the electric wire 12, first, after removing the electric wire 12 from the holding member 13, the normal terminal process may be performed on the electric wire 12. Since the electric wire 12 and the holding member 13 are separate members, the electric wire 12 and the holding member 13 can be easily separated. For this reason, compared with what is called a cabtire cable which shape-molded the electric wire 12 with the synthetic resin, the workability | operativity of the terminal process of the electric wire 12 can be improved as a whole.

  Further, according to the present embodiment, one end of the electric wire 12 is accommodated in the groove 16 on one end side of the holding member 13, and then, for example, the operator holds the electric wire 12 and the holding member 13 on the other end. The electric wire 12 can be easily accommodated in the groove 16 by squeezing to the end side.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIGS. As shown in FIG. 3, in the conductor 10 according to the present embodiment, the holding member 13 is inserted into the pipe 11 in a twisted state. Thereby, each electric wire 12 accommodated in the inside of the groove | channel 16 formed in the extension direction of the electric wire 12 is hold | maintained in the pipe 11 with the attitude | position twisted mutually helically.

  Since the configuration other than the above is substantially the same as that of the first embodiment, the same members are denoted by the same reference numerals, and redundant description is omitted.

  The holding member 13 according to the present embodiment may twist the holding member 13 after performing an insertion process of inserting the holding member 13 into the pipe 11.

  Further, as shown in FIG. 4, after the holding step of holding the electric wire 12 on the holding member 13 is executed, the holding member 13 is twisted, and then the twisted holding member 13 is inserted into the pipe 11. Good.

  When the pipe 11 is bent in a state where the plurality of electric wires 12 held by the holding member 13 are not twisted, the length of the electric wires 12 positioned on the inner peripheral side of the bent portion of the pipe 11 and the bent portion A difference (so-called circumference difference) occurs between the length of the electric wires 12 positioned on the outer circumference side of the cable. Specifically, it is necessary to set the electric wire 12 positioned on the outer peripheral side of the bent portion longer than the electric wire 12 positioned on the inner peripheral side of the bent portion.

  According to the present embodiment, the electric wires 12 are held in a twisted manner by the holding member 13. For this reason, in the part by which the pipe 11 was bent, each electric wire 12 is not hold | maintained in the state fixed to either the inner peripheral side or the outer peripheral side position of a bending part. As a result, each electric wire 12 can absorb the inner and outer circumference difference in the bent portion of the pipe 11, and therefore, when the pipe 11 is bent, the occurrence of the circumference difference between the electric wires 12 can be suppressed.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIGS. As shown in FIG. 5, in the present embodiment, the right end portion of the pipe 11 in FIG. 5 and the holding member 13 exposed from the right end portion of the pipe 11 are, for example, a synthetic resin tape 18 (corresponding to a fixing means). ) Is wound around the pipe 11 and the holding member 13.

  Since the configuration other than the above is substantially the same as that of the first embodiment, the same members are denoted by the same reference numerals, and redundant description is omitted.

  The conductor 10 according to the present embodiment is manufactured as follows. First, after performing an insertion process, a fixing process is performed. That is, the right end of the pipe 11 is wound by winding the tape 18 between the right end of the pipe 11 and the holding member 13 between the right end of the pipe 11 and the holding member 13 exposed from the right end in FIG. The part and the holding member 13 are fixed. The pipe 11 and the holding member 13 may be fixed at any end of the pipe 11.

  Next, the twisting process is executed by twisting the holding member 13 exposed from the left end of the pipe 11. Thereby, the conductor 10 according to the present embodiment is completed.

  According to the present embodiment, first, in the fixing step, one end of the pipe 11 (the right end in FIG. 6 in the present embodiment) and the holding member 13 exposed from the right end are fixed. Thereby, in the twisting process, the holding member 13 exposed from the other end of the pipe 11 (the left end in FIG. 6 in the present embodiment) may be twisted. As a result, since it is not necessary to hold both ends of the holding member 13 in the twisting step, the working efficiency is improved. Moreover, since it is easy to control the frequency | count and grade of twisting the holding member 13, the pitch of the twist about each electric wire 12 is easily controllable.

<Embodiment 4>
Next, a fourth embodiment of the present invention will be described with reference to FIG. In the present embodiment, the holding member 13 is formed with three grooves 16, 16, 16 extending in the extending direction of the holding member 13. The three grooves 16 are formed at positions symmetrical with respect to the central axis of the holding member 13. In the present embodiment, the central axis of the grooves 16 is formed at a position that forms a substantially equilateral triangle.

  The electric wires 12 are held in the three grooves 16 formed in the holding member 13. The three electric wires 12 are held by a holding member 13 at a position where the central axis of the electric wires 12 forms a substantially equilateral triangle.

  The holding member 13 may not be twisted inside the pipe 11, or may be configured to be held in a twisted posture by being twisted inside the pipe 11.

  Since the configuration other than the above is substantially the same as that of the first embodiment, the same members are denoted by the same reference numerals, and the description of the overlapping structures, operations, and effects is omitted.

<Embodiment 5>
Next, Embodiment 5 of the present invention will be described with reference to FIG. In the present embodiment, a plurality of (three in the present embodiment) ribs 19, 19, 19 are provided on the outer peripheral surface of the holding member 13, extending along the extending direction of the holding member 13. The rib 19 is formed at a position between the adjacent openings 17 in the holding member 13. Further, these ribs 19 are formed at symmetrical positions with respect to the central axis of the holding member 13. The rib 19 is formed integrally with the holding member 13. The cross-sectional shape of the rib 19 is substantially triangular.

  Since the configuration other than the above is substantially the same as that of the first embodiment, the same members are denoted by the same reference numerals, and redundant description is omitted.

  When the holding member 13 is inserted into the pipe 11, if the frictional force between the pipe 11 and the holding member 13 is large, there is a concern that the efficiency of the insertion operation of the holding member 13 is reduced.

  According to the present embodiment, the inner peripheral surface of the pipe 11 is in contact with the rib 19 formed on the outer peripheral surface of the holding member 13. Thereby, the contact area of the pipe 11 and the holding member 13 can be reduced. As a result, since the frictional force between the inner peripheral surface of the pipe 11 and the outer peripheral surface of the holding member 13 can be reduced, the efficiency of the operation of inserting the holding member 13 into the pipe 11 can be improved.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The surface of the holding member 13 may be coated with a synthetic resin having a smaller coefficient of friction with the pipe 11 than the synthetic resin or rubber constituting the holding member 13, for example, with a thickness of about 20 μm. Thereby, the holding member 13 can be easily inserted into the pipe 11 in the insertion step. The synthetic resin to be coated may be Teflon (registered trademark) or may be a fluororesin having a smaller environmental impact than Teflon, and any synthetic resin can be used as necessary.
(2) In the present embodiment, the electric wire 12 is the covered electric wire 12 in which the core wire 14 is surrounded by the insulating coating 15. However, the electric wire 12 is not limited to this, and the holding member 13 has insulation and the inner peripheral surface of the pipe 11. The bare wire 12 may be used as the wire 12 when the insulation treatment is performed.
(3) In the present embodiment, the groove 16 is formed so as to extend in the extending direction of the holding member 13. However, the present invention is not limited to this, and the groove 16 includes a plurality of spiral grooves on the outer peripheral surface of the holding member 13. 16 may be formed. By accommodating the electric wire 12 in the spiral groove 16, the twisting step can be omitted.
(4) The holding member 13 may not have flexibility when used for the linear pipe 11. Moreover, when using the covered electric wire 12, it does not need to have insulation.
(5) In the fifth embodiment, the rib 19 is formed integrally with the holding member 13. However, the rib 19 has a coefficient of friction with the pipe 11 rather than the synthetic resin or rubber constituting the holding member 13. It may be formed by two-color molding with a small synthetic resin. Thereby, the work efficiency of an insertion process can be improved further.
(6) In this embodiment, the electric wire 12 is held by the holding member 13 and then inserted into the pipe 11. However, the present invention is not limited to this, and the electric wire 12 is inserted after the holding member 13 is inserted into the pipe 11. 12 may be inserted through the holding member 13.
(7) In the fifth embodiment, the cross-sectional shape of the rib 19 is substantially triangular. However, the shape is not limited to this, and may be any shape such as a substantially rectangular shape or a substantially semicircular shape.
(8) In the fifth embodiment, the holding member 13 has the three ribs 19 formed. However, the present invention is not limited to this, and two or four or more ribs 19 may be formed.
(9) In this embodiment, the holding member 13 is configured to hold two or three electric wires 12, but the electric wires 12 held by the holding member 13 may be four or more.
(10) In the present embodiment, the cross-sectional shape of the pipe 11 is a circular shape, but is not limited to this, and the cross-sectional shape of the pipe 11 may be an arbitrary shape such as an oval shape or a square shape as necessary. sell.
(11) In the present embodiment, the cross-sectional shape of the electric wire 12 is a substantially circular shape, but is not limited thereto, and may be an arbitrary shape such as an oval shape or a rectangular shape as necessary.

1 is a cross-sectional view of a conductor according to Embodiment 1 of the present invention. The principal part expansion perspective view which shows the edge part of a conductor The principal part expansion perspective view which shows the edge part of the conductor which concerns on Embodiment 2. FIG. The principal part expansion perspective view which shows an example of the manufacturing process of a conductor Partially cutaway side view showing a conductor according to Embodiment 3 Partially cutaway side view showing manufacturing process of conductor Cross-sectional view showing a conductor according to Embodiment 4 Cross-sectional view showing a conductor according to Embodiment 5

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Conductor 11 ... Pipe 12 ... Electric wire 13 ... Holding member 16 ... Groove 19 ... Rib 18 ... Tape (fixing means)

Claims (8)

A conductor comprising a metal pipe, a plurality of electric wires inserted through the pipe, and a holding member inserted into the pipe to hold the electric wire in the pipe,
The holding member is a member separate from the electric wire, and is made of a synthetic resin or rubber having a thermal conductivity larger than that of air. The holding member accommodates the electric wire and at least part of the outer peripheral surface of the electric wire is an inner periphery of the pipe. A conductor having a groove for holding the electric wire in contact with a surface. The conductor according to claim 1, wherein the groove is formed to extend in an extending direction of the holding member. The conductor according to claim 1, wherein a plurality of ribs extending along an extending direction of the holding member are provided on an outer peripheral surface of the holding member. The conductor according to any one of claims 1 to 3, wherein the electric wires are held in a twisted posture by the holding member. A method of manufacturing a conductor comprising a plurality of electric wires housed in a metal pipe,
Holding that holds the electric wire in the holding member by housing the electric wire in the groove of the holding member made of a synthetic resin or rubber having a thermal conductivity higher than that of air and having a groove for receiving the plurality of electric wires. Performing a step and an insertion step of inserting the holding member holding the electric wire into the pipe in a state where at least a part of the outer peripheral surface of the electric wire is in contact with the inner peripheral surface of the pipe. A method for producing a conductor characterized by the above. The holding step includes a step of accommodating one end portion of the electric wire at one end portion of the groove formed to extend in the extending direction of the holding member, and the electric wire of the holding member is accommodated in the groove. A step of accommodating the electric wire in the groove by pushing the electric wire into the groove from one end portion of the groove to the other end portion in a state where the end portion on the side made is fixed; The method of manufacturing a conductor according to claim 5, comprising: The method of manufacturing a conductor according to claim 6, wherein after the insertion step is performed, a twisting step is performed in which the electric wires are twisted to each other by twisting the holding member. After performing the insertion step, after performing a fixing step of fixing either one of the ends of the pipe and the holding member exposed from the one end by a fixing means, The method of manufacturing a conductor according to claim 7, wherein the twisting step is performed by twisting the holding member located at the other end of the pipe.

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