JP2015079665A - Shield electric wire and production method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield electric wire and a production method of the same capable of easily producing a shield electric wire at low costs without deterioration in quality.SOLUTION: A shield electric wire 11 comprises: a drain line 15 on which a core electric wire 13 which is coated by insulation coating and a conductor 25 are exposed; and a shield tape 17 vertically added to the core electric wire 13 and the drain line 15, on the outside of which an insulation layer is formed, which covers the core electric wire 13 and the drain line 15 so as to face their inner surfaces serving as conductor surfaces 29, and whose both ends in a longitudinal direction only are fixed to the core electric wire 13 and the drain line 15 and are twisted with the core electric wire 13 and the drain line 15.

Description

  The present invention relates to a shielded electric wire and a method for manufacturing a shielded electric wire.

As a protective measure against electromagnetic noise in existing wire harnesses, a method of shielding induced noise and induced noise with a shielding tape such as aluminum foil or copper foil is generally used (see, for example, Patent Document 1).
As shown in FIGS. 7A to 7D, the shield wire 501 with such protection measures includes a core wire 507 in which a core wire 503 is covered with an insulating resin layer 505, and a single drain wire 509. The shield tape 511 is made of a metal foil tape that is wider than the added value of the outer peripheral lengths of the core wire 507 and the drain wire 509, and the insulating resin tape 513. The core wire 507 and the drain wire 509 are twisted with the shield tape 511 interposed therebetween. A twisted shield tape 511 is wound around and covered with the outer periphery of the core wire 507 and the drain wire 509. An insulating resin tape 513 is further wound around the outer periphery of the shield tape 511 wound around the outer periphery.

The shield wire 501 is formed by the formation process shown in FIGS.
First, as shown in FIG. 8A, the core wire 507 and the drain wire 509 are disposed in parallel, and the shield tape 511 is disposed therebetween.
Next, as shown in FIG. 8B, the core wire 507, the drain wire 509, and the shield tape 511 are integrally twisted from one end in the length direction (that is, twisted) to sandwich the shield tape 511. In this state, the core wire 507 and the drain wire 509 are twisted wires. In this twisting operation, when the core wire 507 and the drain wire 509 are gripped to form a twisted wire, the shield tape 511 is wound around the core wire 507 and the drain wire 509 that become the twisted wire. Thereby, both the core wire 507 and the drain wire 509 are covered with the shield tape 511 on the entire outer peripheral surface thereof.
Finally, as shown in FIG. 8C, an insulating resin tape is applied to the outer peripheral surface of the core wire 507, the drain wire 509, and the shield tape 511 integrated by twisting, that is, the outer periphery of the shield tape 511 located on the outer peripheral surface. A shield wire 501 is formed by winding 513 in a wrinkle shape and fixing the end with an adhesive.

  Since the shield wire 501 having the above configuration is twisted with a metal foil tape sandwiched between the core wire 507 and the drain wire 509, the shield layer made of the metal foil tape has the outer peripheral surface of the core wire 507 and the drain wire 509. The outer peripheral surface can be brought into contact with each other with a large contact area and sufficient contact pressure, and the shield performance can be stabilized.

JP 2011-165631 A

  However, since the above-described conventional shield wire 501 is twisted with the shield tape 511 sandwiched between the core wire 507 and the drain wire 509, it takes time to install the shield tape 511. In addition, since the shield tape 511 that is a metal foil tape is exposed to the outside, an insulation process in which the insulating resin tape 513 is wound is indispensable when considering an in-vehicle environment, and the manufacturing cost increases. Further, even when the insulating resin tape 513 is wound, there is a risk of short-circuiting with the vehicle body due to wear of the insulating resin tape 513. Further, since the shield tape 511 is wound around the outer periphery in the shape of a figure 8, the tape width increases, and this also increases the manufacturing cost. Furthermore, if there is a difference in length between the core wire 507 and the drain wire 509, the drain wire 509 extends out of the covering shield tape 511, and the product structure may not be established. Contains.

  This invention is made | formed in view of the said condition, The objective is to provide the manufacturing method of the shielded wire and shielded wire which can be easily manufactured at low cost, without degrading quality.

The above object of the present invention is achieved by the following configuration.
(1) The insulation-coated core electric wire and the exposed drain wire, and the core electric wire and the drain wire are vertically attached to each other so that the inner surfaces that form the conductor surface with the insulating layer formed on the outside face each other. A shielded electric wire comprising: a shield tape that wraps around the core electric wire and the drain wire, and that is fixed to the core electric wire and the drain wire only at both ends in the longitudinal direction and twisted together with the core electric wire and the drain wire.

  According to the shielded electric wire having the above configuration (1), the core electric wire and the drain wire arranged in parallel are wrapped by the vertically attached shield tape, and the core electric wire, the drain wire and the shielding tape are twisted together. A shield tape twisted together is wound around the twisted core electric wire and drain wire, and the core electric wire and drain wire are covered with the shield tape. In the shield tape, the conductor surface on the inner surface is electrically connected to the drain wire from which the conductor is exposed among the twisted core electric wire and drain wire. Further, the twisted shield tape is tightened, so that no gap is generated due to lifting, and the twisted shield tape is conducted to the exposed drain wire with sufficient contact pressure. A shield layer is formed by the conductor surface of the shield tape on the outer periphery of the core wire and the drain wire, the shield layer and the drain wire are electrically connected by winding, and the drain wire is connected to the ground. A shielding effect is obtained. Further, since the insulating layer of the shield tape is disposed on the outside, the shielded wire is prevented from being deteriorated in shielding performance due to contact with the vehicle body or the like.

(2) The shielded electric wire according to (1) above, wherein the drain wire is wound around the core electric wire in advance before being twisted with the shielding tape.

  According to the shielded electric wire having the configuration of (2) above, only the drain wire of the core electric wire, the drain wire and the shield tape before being twisted together is wound around the core electric wire in advance. Therefore, for example, even if there are a plurality of core electric wires, a drain wire is wound around the outer periphery thereof. That is, the drain wire is not buried between the plurality of core electric wires. Thereby, the contact area of the drain wire twisted with the several core electric wire and the conductor surface of a shield tape does not reduce.

(3) The shielded electric wire according to (1) above, wherein the drain wire is pre-twisted with the core electric wire before being twisted with the shield tape.

  According to the shielded electric wire having the configuration (3), only the core electric wire and the drain wire before being twisted together with the shielding tape are twisted in advance. Thus, for example, even if there is a line length difference (dimension difference) between the core electric wire and the drain wire, the line length difference can be absorbed by twisting. That is, when the core tape and the drain wire are wrapped so that the inner surfaces of the shield tape face each other, the longer wire does not hang down from the shield tape. Accordingly, even when the core electric wire and the drain wire having a difference in wire length are twisted together with the shield tape, the longer wire does not jump out from between the twisted shield tape.

(4) A plurality of core wires covered with insulation and drain wires with exposed conductors, and a plurality of twisted core wires and drain wires that are vertically attached to each other, and an insulating layer is formed on the outside to form a conductor surface The plurality of core electric wires and the drain wire are wrapped so as to face each other, and only both ends in the longitudinal direction are fixed to the plurality of core electric wires and the drain wire, so that twist twisting back of the plurality of core electric wires is cancelled. And a shield tape twisted in the twist untwisting direction of the plurality of core wires together with the plurality of core wires and the drain wire.

  According to the shielded electric wire having the configuration of (4) above, the shield tape, together with the multiple core electric wires and the drain wires, is in the twist untwist direction of the multiple core electric wires until the twist return of the multiple core electric wires is canceled. By being twisted (that is, twisted in a direction opposite to the twist direction of the plurality of core electric wires), a drain wire and a shield tape are wound around the outer periphery of the twisted core electric wires. The drain wire is wound around the outer periphery of a plurality of twisted core electric wires. The shield tape is also wound around the outer periphery of the plurality of core electric wires together with the drain wire. In this structure, a plurality of pre-twisted core wires are rewound together with vertically attached drain wires and shield tapes until twist twisting of the plurality of core wires is canceled (twisted core wires And twisted in the twist untwisting direction). That is, even if there are a plurality of core electric wires, a drain wire is wound around the outer periphery thereof. The drain wire is not buried between the plurality of core electric wires. Thereby, the contact area of the drain wire twisted with the several core electric wire and the conductor surface of a shield tape does not reduce. Further, the plurality of core electric wires twisted in the twist untwisting direction together with the drain wire and the shielding tape until the twist untwisting is released are now wound up by the drain wire and the shielding tape. As a result, the space between the core electric wire and the drain wire is narrowed in the shielded electric wire, the diameter is reduced, and the adhesion between the shield tape and the drain wire is further improved.

(5) The insulated core wire and the drain wire with exposed conductor are twisted,
The core electric wire and the drain wire are vertically attached, an insulating layer is formed on the outer side, and the inner surfaces that are conductor surfaces are faced to wrap the core electric wire and the drain wire, and only the longitudinal ends are the core electric wire and A shield tape fixed to the drain wire and twisted together with the core wire and the drain wire;
A shielded electric wire comprising:

  According to the method for manufacturing a shielded electric wire having the configuration of (5) above, the twisted core electric wire and the drain wire are wrapped with the vertically attached shield tape, and the core electric wire, the drain wire, and the shield tape are further twisted together. ing. That is, only the core wire and the drain wire before being twisted together with the shield tape are twisted in advance. Therefore, even if there is a line length difference between the core electric wire and the drain wire, the line length difference can be absorbed by twisting. That is, when wrapping the core wire and the drain wire so that the inner surfaces of the shield tape face each other face each other, the longer drain wire or the core wire does not hang down from the shield tape. Thereby, even when the drain wire and the core electric wire are further twisted together with the shield tape, the longer drain wire or the core electric wire does not jump out between the twisted shield tapes.

(6) A step of attaching a drain wire having a conductor exposed to an insulation-coated core electric wire, and a step of vertically attaching a shield tape having an insulating layer formed on the outside and an inner surface as a conductor surface to the core electric wire and the drain wire, Wrapping the core wire and the drain wire so that the inner surfaces of the shield tape face each other, and fixing and twisting both ends of the shield tape in the longitudinal direction together with the core wire and the drain wire, A method for producing a shielded electric wire, comprising:

  According to the method for manufacturing a shielded electric wire having the configuration (6), a shielded electric wire covered with a shield tape is obtained. Accordingly, it is possible to easily manufacture a shielded electric wire with simple equipment without using a dedicated harness assembling apparatus including a sheet feeding unit, a conductor winding die, an insulating winding die and the like. Further, since the twisting operation and the shield forming operation of the core electric wire and the drain wire can be performed at the same time, the cycle time is shortened, and the manufacturing cost can be reduced. In addition, since it is possible to mold by fixing it with the shield tape wrapped at both ends in the longitudinal direction and twisting it, there is no need to position the core wire and drain wire and the shield tape with high precision. Work becomes easy. Since the shield tape is wrapped and wrapped so as to sandwich the core electric wire and the drain wire, the tape width is reduced compared to the conventional tape wound in the shape of figure 8, and the member cost can be reduced. Furthermore, since a shielded electric wire can be manufactured using a core electric wire and a drain wire that are automatically crimped to a terminal, post-processing can be reduced.

The shielded electric wire according to the present invention can be easily manufactured at low cost without degrading quality.
According to the method for manufacturing a shielded wire according to the present invention, a shielded wire can be manufactured if there is a twist mechanism. Therefore, facilities can be simplified, and a shielded wire can be easily manufactured at low cost without degrading quality.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

(A) is a side view of the shielded electric wire according to the first embodiment of the present invention, (b) is a side view of the shielded electric wire in which the insulating tape is wound on all outer circumferences, and (c) is a position of the shielded electric wire at the position of the insulating tape. It is sectional drawing cut | disconnected by. (A) is a front view of a parallel arrangement process of shielded wires according to the first embodiment, (b) is a side view of (a), (c) is a front view of a clamping process, and (d) is a side view of (c). (E) is a front view of a twist process with a shield tape, (f) is a side view of (e). (A) is a front view of the parallel arrangement step of shielded wires according to the second embodiment of the present invention, (b) is a side view of (a), (c) is a front view of a drain wire winding step, and (d). Is a side view of (c), (e) is a front view of the clamping process, (f) is a side view of (e), (g) is a front view of the shield tape twist process, and (h) is a side view of (g). FIG. (A) is a front view of a parallel arrangement process of shielded wires according to a third embodiment of the present invention, (b) is a side view of (a), (c) is a front view of a twist process of a plurality of core wires, ( (d) is a side view of (c), (e) is a front view of the clamping process, (f) is a side view of (e), (g) is a front view of the twisting process with the shield tape, and (h) is ( It is a side view of g). (A) is a front view of a parallel arrangement process of shielded wires according to a fourth embodiment of the present invention, (b) is a side view of (a), (c) is a front view of a twist process of a drain wire and a core wire, (D) is a side view of (c), (e) is a front view of the clamping process, (f) is a side view of (e), (g) is a front view of the twisting process with the shield tape, (h) is It is a side view of (g). (A) is a front view of the parallel arrangement | positioning process of the shield wire which concerns on a comparative example, (b) is a front view of a clamp process, (c) is a front view of a twist process with a shield tape. A conventional shield wire is shown, (A) is a perspective view, (B) is a cross-sectional view taken along line AA of (A), (C) is a cross-sectional view taken along line BB of (A), and (D) is (A) It is a CC sectional view taken on the line of FIG. (A)-(C) are explanatory drawings which show the formation process of the conventional shield wire.

Embodiments according to the present invention will be described below with reference to the drawings.
As shown in FIGS. 1A to 1C, the shielded electric wire 11 according to the first embodiment includes a core electric wire 13, a drain wire 15, and a shield tape 17 as main members. In addition to this, an insulating tape 19 wound around both ends in the longitudinal direction of the shielded electric wire 11 or the entire circumference may be used.

In the core electric wire 13, a core wire 21 in which strands made of a copper-based metal wire are combined is covered with an insulating resin layer 23. The drain wire 15 is covered with an insulating resin layer 27 only with a strand of a strand made of a copper-based metal wire as the conductor 25 or a single core wire made of a copper-based metal wire. In the drain wire 15, for example, the insulating resin layer 27 other than both ends in the longitudinal direction is removed (peeled), and the conductor 25 is exposed. An earth terminal or a connector terminal can be crimped to the conductor 25 at the end of the drain wire 15 in advance. The conductor 25 is not limited to a strand made of a copper-based metal wire, and may be a strand made of aluminum or an aluminum alloy.
The shield tape 17 is formed in a long tape shape including a conductor layer and an insulating layer laminated on the conductor layer.

  The shield tape 17 is vertically attached to the core electric wire 13 and the drain wire 15. The shield tape 17 vertically attached wraps the core electric wire 13 and the drain wire 15 so that the inner surface which becomes the conductor surface 29 faces each other with the insulating layer on the outer side, and only the both ends in the longitudinal direction are the core electric wire 13 and the drain wire 15. The core wire 13 and the drain wire 15 are twisted together.

Next, the manufacturing method of the shielded electric wire 11 which has the said structure is demonstrated.
The manufacturing method of the shielded electric wire 11 according to the present embodiment includes a step of attaching the drain wire 15 with the conductor 25 exposed to the core wire 13 with insulation coating, and a shield tape 17 in which an insulating layer is formed on the outer side and the inner surface becomes the conductive surface 29. 2 (see FIG. 2A) and a process of wrapping the core wire 13 and the drain wire 15 so that the inner surfaces of the shield tape 17 face each other (see FIG. 2C). )) And a step (see FIG. 2E) of fixing both ends of the shield tape 17 in the longitudinal direction together with the core electric wire 13 and the drain wire 15 and twisting the shield tape 17 together. That is, the shield tape 17 is wound simultaneously with the twisting operation of the core wire 13 and the drain wire 15.

More specifically, it consists of the following five steps.
In the first step, as shown in FIG. 2A, the core electric wires 13 and the drain wires 15 are arranged in parallel, and a shield tape 17 having an insulating layer formed on the outside and the inner surface serving as the conductor surface 29 is vertically attached.
In the second step, as shown in FIG. 2 (c), the shield tape 17 is fixed in a state in which the core electric wire 13 and the drain wire 15 are wrapped only at both end portions.
In the third step, as shown in FIG. 2 (e), the shield tape 17 is wound around the outer periphery simultaneously with the twisting (twisting) of the core wire 13 and the drain wire 15 by rotating one end (or both ends). .

In the fourth step, the core wire 13 and the shield tape 17 are twisted and then twisted back to prevent the core wire 13 and the shield tape 17 from being twisted back.
In the fifth step, the insulating tape 19 is wound around the terminal portion or the entire length (according to the specification) with the shield tape 17 wound around the outer periphery. The insulation tape 19 may be wound by any of vertical side winding, spiral winding, worship winding, and the like.

  According to the shielded electric wire 11 according to the first embodiment, the core electric wire 13 and the drain wire 15 arranged in parallel are wrapped by the vertically attached shield tape 17, and the core electric wire 13, the drain wire 15 and the shield tape 17 are wrapped. And are twisted together. The twisted shield tape 17 is wound around the twisted core wire 13 and drain wire 15, and the core wire 13 and drain wire 15 are covered with the shield tape 17.

  The shield tape 17 is electrically connected to the drain wire 15 where the conductor 25 is exposed out of the core wire 13 and the drain wire 15 whose inner conductor surface 29 is twisted. In addition, the twisted shield tape 17 is tightened so that no gap is generated due to lifting, and the shield tape 17 is electrically connected to the exposed drain wire 15 with sufficient contact pressure. A shield layer is formed on the outer periphery of the core electric wire 13 and the drain wire 15 by the conductor surface 29 of the shield tape 17, and the shield layer and the drain wire 15 are electrically connected by winding and the drain wire is grounded. Thus, the shielded wire 11 can obtain a shielding effect. In addition, since the insulating layer of the shield tape 17 is disposed on the outer side, the shield wire 11 is prevented from being deteriorated in shield performance due to contact with the vehicle body or the like.

  Moreover, according to the manufacturing method of the shielded electric wire 11 which concerns on this 1st Embodiment, it attaches the drain wire 15 to the core electric wire 13, wraps this with the shield tape 17, fixes the longitudinal direction both ends, and is twisted, The shielded electric wire 11 covered with the tape 17 is obtained. Thus, the shielded electric wire 11 can be easily manufactured with simple equipment without using a dedicated harness assembling apparatus including a sheet feeding unit, a conductor winding mold, an insulating winding mold, and the like. In addition, since the twisting operation and the shield forming operation of the core wire 13 and the drain wire 15 can be performed at the same time, the cycle time is shortened, and the manufacturing cost can be reduced.

  In addition, since it is possible to mold only by fixing both ends in the longitudinal direction wrapped in the shield tape 17 and twisting, it is necessary to position the positional relationship between the core wire 13 and the drain wire 15 and the shield tape 17 with high accuracy. The set work is easy. Since the shield tape 17 is wrapped so as to sandwich the core electric wire 13 and the drain wire 15, the tape width is smaller than that of the conventional shield wire 501 wound in the shape of figure 8 (see FIGS. 7A to 7D). Thus, the material cost can be reduced. Furthermore, since the shielded electric wire 11 can be manufactured by using the core electric wire 13 and the drain wire 15 that have been subjected to automatic terminal crimping, post-processing can be reduced.

Next, the shielded electric wire 31 according to the second embodiment of the present invention will be described.
In the following description of the second embodiment, members that are the same as the members of the shielded electric wire 11 of the first embodiment shown in FIGS. 1 and 2 are given the same reference numerals, and redundant descriptions are omitted.
As shown in FIG. 3C, the shielded electric wire 31 according to the second embodiment is wound around the core electric wire 13 before the drain wire 15 is twisted. Other structures and manufacturing methods are the same as those of the shielded electric wire 11 of the first embodiment described above.

  According to the shielded electric wire 31 according to the second embodiment, only the drain wire 15 out of the core electric wire 13, the drain wire 15 and the shield tape 17 before being twisted together is wound around the core electric wire 13 in advance. Therefore, for example, even if there are a plurality of core electric wires 13, the drain wire 15 is wound around the outer periphery thereof. That is, the drain wire 15 is not buried between the plurality of core electric wires 13. Thereby, the contact area between the drain wire 15 twisted together with the plurality of core electric wires 13 and the conductor surface 29 of the shield tape 17 does not decrease. Even if there is a dimensional difference between the core wire 13 and the drain wire 15, the dimensional difference can be eliminated by a process such as twisting the core wire 13 or winding the drain wire 15 first.

Next, the shielded electric wire 33 according to the third embodiment of the present invention will be described.
In the following description of the third embodiment, members that are the same as the members of the shielded electric wire 11 of the first embodiment are given the same reference numerals, and redundant descriptions are omitted.
In the shielded electric wire 33 according to the third embodiment, first, a plurality (two in the third embodiment) of the core electric wires 13 shown in FIG. 4A are twisted as shown in FIG. 4C. Thus, it is vertically attached to the drain line 15 which is not twisted.
Usually, when a plurality of twisted electric wires are released from clamping at both ends in the longitudinal direction, they are twisted back due to springback of the electric wires themselves. Therefore, it is general that the rotational return due to the springback is twisted in advance (reversely rotated), and a twistback process is performed to prevent the twisted wire from being twisted back due to the springback.
Therefore, the two core electric wires 13 shown in FIG. 4C are in a state of being twisted and not subjected to the twisting-back process, and a drain wire 15 is vertically attached thereto. Further, a shield tape 17 is further vertically attached to the core wire 13 and the drain wire 15. As shown in FIG. 4 (e), the shield tape 17 vertically attached wraps the core electric wire 13 and the drain wire 15 so that the inner surfaces that form the conductor surfaces 29 are formed on the outer side and the insulating layer is formed. Only both ends in the direction are clamped together with the core wire 13 and the drain wire 15.
Then, as shown in FIG. 4 (g), the shield tape 17 together with the two core electric wires 13 and the drain wires 15 is 2 until the twist untwisting of the two core electric wires 13 due to the untwisting process is canceled. The core wire 13 is twisted in the twist-twist back direction.

  According to the shielded electric wire 33 according to the third embodiment, the two shield tapes 17 together with the two core electric wires 13 and the drain wire 15 are used until the twist twisting of the two core electric wires 13 is canceled. By twisting in the twist unwinding direction of the core wire 13 (that is, twisting in the direction opposite to the twist direction of the two core wires 13), the drain wire is formed on the outer periphery of the two twisted core wires 13. 15 and a shield tape 17 are wound. The drain wire 15 is wound around the outer periphery of the twisted two vertically attached core electric wires 13. The shield tape 17 is also wound around the outer periphery of the core electric wire 13 together with the drain wire 15. In this structure, the two core wires 13 twisted in advance are rewinded together with the drain wires 15 and the shield tape 17 vertically attached until the twist untwisting of the two core wires 13 is canceled (twisted). The two core electric wires 13 are twisted in the twist unwinding direction). That is, even if there are two core electric wires 13, the drain wire 15 is wound around the outer periphery thereof. The drain wire 15 is not buried between the core electric wires 13. Thereby, the contact area between the drain wire 15 twisted together with the two core electric wires 13 and the conductor surface 29 of the shield tape 17 does not decrease.

  Further, the two core electric wires 13 twisted in the twist untwisting direction together with the drain wire 15 and the shield tape 17 are unwound by the drain wire 15 and the shield tape 17 until the twist untwisting is released. Thereby, the shield electric wire 33 narrows down the space between the core electric wire 13 and the drain wire 15, realizes a narrow diameter, and further improves the adhesion between the shield tape 17 and the drain wire 15.

Next, the shielded electric wire 35 according to the fourth embodiment of the present invention will be described. Moreover, in order to clarify the effect of this 4th Embodiment, the shielded electric wire 401 of a comparative example is also demonstrated.
In the following description of the fourth embodiment and the comparative example, the same members as those of the shielded electric wire 31 of the second embodiment shown in FIG.
As shown in FIG. 5C, the shielded wire 35 according to the fourth embodiment is twisted in advance with the core wire 13 before the drain wire 15 is twisted with the shield tape 17. Other structures and manufacturing methods are the same as those of the shielded electric wire 11 of the second embodiment described above.

  According to the shielded electric wire 35 according to the fourth embodiment, only the core electric wire 13 and the drain wire 15 before being twisted together with the shield tape 17 are twisted in advance. Therefore, as shown in FIG. 5A, even if the drain wire 15 is longer than the core electric wire 13 and there is a difference in the wire length between the core electric wire 13 and the drain wire 15, the wire length difference can be reduced by twisting. Can be absorbed. That is, when the core electric wire 13 and the drain wire 15 are wrapped so that the inner surfaces of the shield tape 17 that become the conductor surfaces 29 face each other, the longer drain wire 15 is connected to the shield tape 17 as shown in FIG. There will be no drooping. Thereby, even when the drain wire 15 and the core electric wire 13 are twisted together with the shield tape 17, the longer drain wire 15 does not jump out from between the twisted shield tape 17.

  On the other hand, in the shielded electric wire 401 of the comparative example, as shown in FIG. 6A, the drain wire 15 is longer than the core electric wire 13, and there is a line length difference between the core electric wire 13 and the drain wire 15. When wrapping the core electric wire 13 and the drain wire 15 so that the inner surfaces of the shield tape 17 facing the conductor surface 29 face each other, the longer drain wire 15 hangs down from the shield tape 17 as shown in FIG. There is a possibility that. Thereby, when the drain wire 15 and the core electric wire 13 are twisted together with the shield tape 17, the longer drain wire 15 jumps out from between the twisted shield tape 17 as shown in FIG. End up.

Therefore, according to the shielded electric wire 11, the shielded electric wire 31, the shielded electric wire 33, and the shielded electric wire 35 according to each embodiment described above, it can be easily manufactured at a low cost without degrading the quality.
Furthermore, according to the manufacturing method of the shielded electric wire 11, the shielded electric wire 31, and the shielded electric wire 33 according to each of the above-described embodiments, since it can be manufactured if there is a twist mechanism, the equipment can be simplified and the quality is not deteriorated. A shielded wire can be easily manufactured at low cost.
In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

DESCRIPTION OF SYMBOLS 11 ... Shield electric wire 13 ... Core electric wire 15 ... Drain wire 17 ... Shield tape 25 ... Conductor 29 ... Conductor surface

Claims (6)

A core wire with insulation coating and a drain wire with exposed conductors;
The core electric wire and the drain wire are vertically attached, an insulating layer is formed on the outer side, and the inner surfaces that are conductor surfaces are faced to wrap the core electric wire and the drain wire, and only the longitudinal ends are the core electric wire and A shield tape fixed to the drain wire and twisted together with the core wire and the drain wire;
A shielded electric wire comprising:   The shielded electric wire according to claim 1, wherein the drain wire is wound around the core electric wire in advance before being twisted with the shield tape.   The shielded electric wire according to claim 1, wherein the drain wire is twisted in advance with the core electric wire before being twisted with the shield tape. A plurality of insulated core wires and drain wires with exposed conductors;
The plurality of core electric wires and the drain wires are vertically attached to the twisted core electric wires and the drain wires, and the inner wires that are the conductor surfaces are formed with an insulating layer formed on the outer side so as to face each other. Twist twisting of the plurality of core electric wires together with the plurality of core electric wires and the drain wires until only both ends in the direction are fixed to the plurality of core electric wires and the drain wires, and twisting back of the twisting of the plurality of core electric wires is cancelled. Shield tape twisted in the return direction,
A shielded electric wire comprising: The insulated core wire and the drain wire with exposed conductor are twisted,
The core electric wire and the drain wire are vertically attached, an insulating layer is formed on the outer side, and the inner surfaces that are conductor surfaces are faced to wrap the core electric wire and the drain wire, and only the longitudinal ends are the core electric wire and A shield tape fixed to the drain wire and twisted together with the core wire and the drain wire;
A shielded electric wire comprising: Attaching a drain wire with a conductor exposed to the insulated core wire; and
A step of vertically attaching a shield tape having an insulating layer formed on the outside and an inner surface serving as a conductor surface to the core electric wire and the drain wire;
Wrapping the core wire and the drain wire so that the inner surfaces of the shield tape face each other;
Fixing and twisting both ends of the shield tape in the longitudinal direction together with the core electric wire and the drain wire; and
A method for producing a shielded electric wire, comprising:

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