JP2002325328A - Shield processing structure and shielding treatment method of multi-conductor shielding wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide shield processing structure and method of shielding a multi- conductor shielded wire, which can surely prevent short circuiting between a grounding wire and a conductor or the conductors, improve the insulation performance and an electrical performance by surely obtaining electrical contact between the grounding wire and a shielding and a covering member. SOLUTION: A shield processing structure is provided with the multi-conductor shielded wire 1 having a plurality of the shielded conductors 4, an aluminum foil covering member 6 for covering outer circumferences of the shielded conductors 4 and an insulation jacket 7 for covering the outer circumference of the aluminum foil covering member 6, and a pair of resin members 10, 11 having recesses 10b, 11b which correspond to an outer cross-sectional shape of the multi-conductor shielded wire 1. The multi-conductor shielded wire 1 is put between a pair of the resin members 10, 11 and disposed in the recesses 10b, 11b. One end of the grounding wire 13 is interposed between the multi-conductor shielded wire 1 and the resin member 10. Ultrasonic vibration is applied between a pair of the resin members 10, 11 in this interposed state; a contacting part between a conductor 13a and the aluminum foil covering member 6 is formed; and the inner space of the insulation jacket 7 is filled with a heat resistance insulation material 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielded structure of a multi-core shielded wire for connecting a shield coating member of a multi-core shielded wire and a ground wire, and a shield processing method thereof.

[0002]

2. Description of the Related Art As a structure and method for shielding a multi-core shielded electric wire, the present applicant uses an ultrasonic horn as a conductive wire of a ground wire using a pair of resin members as a shield covering member of the multi-core shielded electric wire. And an electrical connection. Hereinafter, the shield processing structure and method will be described.

[0003] As shown in FIG.
0 denotes a plurality of shield core wires 100c in which the core wire 100a is covered with the insulating inner skin 100b, a drain wire 100d, the drain wire 100d and the plurality of shield core wires 100c.
Of the shield covering member 100e, and an insulating sheath 100f covering the outer periphery of the shield covering member 100e. A pair of resin members 10
Depressions 101b, 102b in which holes corresponding to the outer cross-sectional shape of the multi-core shielded wire 100 are formed in a state where the joining surfaces 101a, 102a abut each other.
Respectively. The ultrasonic horn 105 includes a lower support 105a and an ultrasonic horn body 15b disposed right above the lower support 105a.

Next, a shield processing procedure will be described. The lower resin member 102 is attached to the lower support 1 of the ultrasonic horn 105.
The multi-core shielded wire 100 is placed from above, one end side of the ground wire 103 is placed thereon, and an upper resin member 101 is put on from above. In this manner, each recess 101b of the pair of resin members 101, 102,
The multi-core shielded electric wire 100 is arranged in 102b, and
One end of the ground wire 103 is interposed between the multi-core shielded wire 100 and the upper resin member 101.

In this state, a pair of resin members 101, 102
The ultrasonic horn 105 vibrates while applying a compressive force therebetween. Then, the insulation sheath 100 of the multi-core shielded wire 100
f and the insulating sheath 103b of the ground wire 103 are melted and scattered by the heat generated by the vibration energy, and the conductive wire (not shown) of the ground wire 103 and the shield covering member 100e of the multi-core shielded wire 100 are electrically contacted. Also, each contact portion between the joining surfaces 101a and 102a of the pair of resin members 101 and 102, and the concave portion 10 of the pair of resin members 101 and 102.
The contact portion between the inner peripheral surfaces of the inner conductors 1b and 102b and the insulating sheath 100f of the multi-core shielded wire 100 and the contact portion between the insulating resin 103b of the ground wire 103 and the pair of resin members 101 and 102 are melted by heat generated by vibration energy. The melted portion is solidified after the completion of the ultrasonic vibration, whereby the pair of resin members 101 and 102, the multi-core shielded wire 100 and the ground wire 103 are fixed to each other.

According to this shield processing structure and method,
Multi-core shielded wire 100 and insulation sheath 10 of ground wire 103
There is no need to peel the skins 0f and 103b, and the lower resin member 102, the multi-core shielded wire 100, the ground wire 103,
Since the ultrasonic vibration may be performed by assembling the resin members 101 in the order of the upper part, the number of processes is small, there is no complicated manual operation, and therefore, automation is possible.

[0007]

However, in the multi-core shielded wire 100, a plurality of shield core wires 100c are not accommodated in the inner space 110 of the shield covering member 100e without any gap, but are accommodated with a certain margin. ing. Therefore, the positional relationship between the plurality of shield core wires 100c is uncertain due to the pressurization between the pair of resin members 101 and 102 and the ultrasonic vibration during the ultrasonic welding, and the positional relationship varies, and the shield core wire 100c transmits large vibration energy. In the case where the positional relationship is such that the shield core wire 100c is received, the insulating endothelium 100b of the shield core wire 100c may be broken or cut. Then, there is a problem that a short circuit between the ground wire 103 or the shield covering member 100e and the core wire 100a and a short circuit between the core wires 100a occur.

Further, for the same reason as described above, the position of the shield covering member 100c is also unstable and uneven due to the pressure between the pair of resin members 101 and 102 and the ultrasonic vibration during the ultrasonic welding. There is a problem that a contact with the ground line 103 cannot be obtained reliably.

Therefore, the present invention has been made to solve the above-mentioned problems, and an object is to improve insulation performance by reliably preventing a short circuit between a ground wire and a core wire or between core wires. It is an object of the present invention to provide a shield processing structure of a multi-core shielded wire and a shield processing method thereof, which can improve electrical performance by reliably obtaining electrical contact between a ground wire and a shield covering member. I do.

[0010]

According to the first aspect of the present invention, there are provided a plurality of shielded core wires whose core wires are covered with an insulating inner sheath, a shield coating member made of a conductor covering the outer circumference of the plurality of shield core wires, and a shield coating member made of the conductor. Further, a multi-core shielded wire having an insulating sheath covering the outer periphery, and a pair of recesses each having a recess in which a hole substantially corresponding to the outer cross-sectional shape of the multi-core shielded wire is formed in a state where the joint surfaces are abutted with each other. A resin member and a grounding wire, the multi-core shielded wire interposed between the pair of resin members, the multi-core shielded wire arranged in each of the recesses, and the multi-core shielded wire and the resin member And one end of the ground wire is interposed between the
In this state, ultrasonic vibration is applied while applying a compressive force between the pair of resin members, and at least the insulating sheath is melted and scattered to form a contact portion between the conductive wire of the ground wire and the shield covering member. A shield processing structure for a multi-core shielded electric wire, wherein a heat-resistant insulating material is filled in an inner space of the shield covering member in which a plurality of the shield core wires are arranged. It is.

In the shielded structure of the multi-core shielded electric wire, the plurality of shielded core wires are almost immovable due to the insulating material filled in the shield covering member. There is no positional variation due to pressurization and ultrasonic vibration between them, and the outer circumference of the shield core is covered with a heat-resistant insulating material. It does not break, and the position of the shield coating member is also stabilized by the insulating material filled inside, so that the pressure between the pair of resin members and ultrasonic vibration during ultrasonic welding are also There is no variation in the position of the shield covering member.

According to a second aspect of the present invention, a plurality of shield cores whose cores are covered with an insulating inner sheath, a shield covering member made of a conductor covering the outer periphery of the plurality of shield cores, and an insulation covering the outer periphery of the shield covering member further A multi-core shielded wire having an outer sheath, and a pair of resin members each having a concave portion in which a receiving hole substantially corresponding to the outer cross-sectional shape of the multi-core shielded wire is formed in a state where the joining surfaces are abutted with each other,
A ground wire, sandwiching the multi-core shielded wire between the pair of resin members, disposing the multi-core shielded wire in each of the recesses, and between the multi-core shielded wire and the resin member. One end of the ground wire is interposed, and in this state, ultrasonic vibration is applied between the pair of resin members, and at least the insulating sheath is melted and scattered to electrically connect the conductive wire of the ground wire and the shield covering member. A method of shielding a multi-core shielded wire to be contacted, wherein the shielded wire uses a heat-resistant insulating material filled in an inner space of the shield covering member in which a plurality of the shield core wires are arranged. A method for shielding a multi-core shielded electric wire.

In this method of shielding a multi-core shielded wire, the plurality of shield core wires are almost immovable due to the insulating material filled inside the shield covering member. There is no positional variation due to pressurization and ultrasonic vibration between them, and the outer circumference of the shield core is covered with a heat-resistant insulating material. It does not break, and the position of the shield coating member is also stabilized by the insulating material filled inside, so that the pressure between the pair of resin members and ultrasonic vibration during ultrasonic welding are also There is no variation in the position of the shield covering member.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show an embodiment of the present invention.
1 is a cross-sectional view of the multi-core shielded electric wire 1, FIG. 2 is a perspective view of a pair of resin members 10 and 11, FIG. 3 is a diagram showing an arrangement relationship of each member at the time of ultrasonic vibration, and FIG. FIG. 5 is a view showing a shield processing structure obtained by ultrasonic vibration, and FIG. 6 is a perspective view of a multi-core shielded electric wire 1 to which a shield processing structure is added. .

The shield processing structure is a multi-core shielded electric wire 1
The aluminum foil covering member 6 is electrically connected to the conductive wire 13a of the ground wire 13 using a pair of resin members 10 and 11 using an ultrasonic horn 15, which will be described in detail below.

As shown in FIG. 1, a multi-core shielded electric wire 1
Is an aluminum foil coating which is a shield coating member made of a conductor covering two shield core wires 4 in which the core wire 2 is covered with the insulating inner skin 3, a drain wire 5, and outer circumferences of the two shield core wires 4 and the drain wire 5. It is composed of a member 6, an insulating outer skin 7 covering the outer periphery of the aluminum foil covering member 6, and a heat-resistant insulating material 8 filled in the inner space of the aluminum foil covering member 6. The insulating inner skin 3 and the insulating outer skin 7 are formed of an insulator made of a synthetic resin, and the core wire 2 and the drain wire 5 are formed of a conductor like the aluminum foil member 6. The insulating material 8 is formed of a resin of the same material as the insulating endothelium 3 or a heat-resistant resin such as polyethylene.

As shown in FIG. 2, a pair of resin members 10,
Numerals 11 are synthetic resin blocks having the same shape, and concave portions 10b, 11b in which holes which substantially correspond to the outer cross-sectional shape of the multi-core shielded electric wire 1 are formed in a state where the joining surfaces 10a, 11a abut each other. Are formed respectively. The concave portions 10b and 11b are, in detail, semicircular grooves having a radius equal to the outer radius of the multi-core shielded electric wire 1.
Further, the resin members 10 and 11 have convex portions 10c and 10c on the left and right sides of the concave portions 10b and 11b and continuously along the periphery thereof.
11c are provided. Each of the projections 10c and 11c of the pair of resin members 10 and 11 is
0a and 1a are provided at positions facing each other.

The physical properties of the resin members 10 and 11 are as follows.
It is harder to melt than insulating sheath 7 etc., acrylic resin, AB
S (acrylonitrile-butadiene-styrene copolymer) resin, PC (polycarbonate) resin, PE
(Polyethylene) resin, PEI (polyetherimide) resin, PBT (polybutylene terephthalate) resin, and the like, which are harder than vinyl chloride and the like generally used for the insulating sheath 7 and the like. From the viewpoint of conductivity and conductivity safety, practicality is required for all the resins listed above,
If the appearance and insulation properties are judged, especially PE
I (polyetherimide) resin and PBT (polybutylene terephthalate) resin are suitable.

As shown in FIG. 3, the ground line 13 is composed of a conductive line 13a and an insulating sheath 13b covering the outer periphery of the conductive line 13a.

As shown in FIG. 3, the ultrasonic horn 15
A lower support 15a capable of positioning the resin member 11 disposed therebelow; and an ultrasonic horn body 15b disposed directly above the lower support 15a and capable of applying ultrasonic vibration while applying a downward pressing force. It is composed of

Next, the shield processing procedure will be described. FIG.
As shown in the figure, the lower resin member 11 is connected to the ultrasonic horn 15
Is placed on the lower support 15a, and the vicinity of the end of the multi-core shielded wire 1 is placed from above, one end of the ground wire 13 is placed thereon, and the resin member 10 Put on. In this way, the multi-core shielded electric wire 1 is disposed in the recesses 10b, 11b of the pair of resin members 10, 11, and the ground wire 13 is provided between the multi-core shielded electric wire 1 and the upper resin member 11. One end side is interposed.

Next, as shown in FIG. 4, the ultrasonic horn 15 is vibrated while lowering the ultrasonic horn main body 15b to apply a compressive force between the pair of resin members 10 and 11. Then, the insulating sheath 7 of the multi-core shielded wire 1 and the insulating sheath 13b of the ground wire 13 are melted and scattered by the internal heat of the vibration energy, and the conductive wire 13a of the ground wire 13 and the aluminum foil covering member 6 of the multi-core shielded wire 1 Are electrically contacted (see FIG. 5). Also, the joining surface 10 of the pair of resin members 10 and 11
a, 11a, and a pair of resin members 10, 11
Contact portions between the inner peripheral surfaces of the concave portions 10b and 11b and the insulating sheath 7 of the multi-core shielded wire 1 and the insulating resin 13 of the ground wire 13
b and a contact portion between the pair of resin members 10 and 11 are melted by internal heat generation of vibration energy, and the melted portion is solidified after the end of the ultrasonic vibration, so that the pair of resin members 10 and 11 are multi-core. Shielded wire 1 and ground wire 13
Are fixed to each other (see FIGS. 5 and 6).

According to this shield processing structure, it is not necessary to peel the insulating sheaths 7 and 13b of the multi-core shielded wire 1 and the grounding wire 13, and the resin member 11, the multi-core shielded wire 1, and the grounding wire 13 underneath. Since the ultrasonic vibration may be performed by assembling the resin members 10 in the order of the upper part, the number of steps is small, and there is no complicated manual operation, and automation is possible.

In the above operation process, the two shield core wires 4 are almost immovable due to the insulating material 8 filled in the aluminum foil covering member 6, so that a pair of wires when ultrasonic welding is performed is used. No positional variation occurs due to the pressure between the resin members 10 and 11 and the ultrasonic vibration, and the outer circumference of the upper shield core wire 4 is covered with the heat-resistant insulating material 8. Since the insulation endothelium 3 of the shield core wire 4 is not torn or cut, short-circuiting between the ground wire 13 and the core wire 2 or between the core wires 2 can be reliably prevented to improve insulation performance. it can. or,
The aluminum foil covering member 6 includes an insulating material 8 filled therein.
As a result, the position does not vary due to the pressurization between the pair of resin members 10 and 11 and the ultrasonic vibration during the ultrasonic welding, so that the insulating outer sheaths 7 and 13b are fused to ground. Electrical contact between the wire 13 and the aluminum foil covering member 6 can be reliably obtained, and electrical performance can be improved.

In the above operation process, before the ultrasonic vibration is performed, the pair of resin members 10 and 11 are
c and 11c, and when the ultrasonic vibration is started in this state, the vibration energy is changed to the convex portions 10c and 11c.
11c, the pair of resin members 10, 11 are sufficiently melted and firmly adhered in the vicinity of the joint surfaces 10a, 11a of each other.
The vibration energy to the ground wire 13 and the multi-core shielded electric wire 1 is suppressed low by the concentration of the vibration energy to the convex portions 10 c and 11 c of the multi-core shielded electric wire 1. Vibration energy is transmitted only to the extent that the insulating sheath 13b is melted and the ground wire 13 and the aluminum foil covering member 6 are electrically connected. Therefore, the insulation endothelium 3 of the multi-core shielded electric wire 1 is not broken or cut by melting due to excessive transmission of vibration energy. As described above, the pair of resin members 10 and 11
The connection between them can be strengthened, and the short circuit and the strength deterioration of the multi-core shielded electric wire 1 due to the contact of the ground wire 13 and the aluminum foil covering member 6 with the core wire 2 can be prevented.

In the above embodiment, each of the resin members 10,
The convex portions 10c, 11c provided on the
11b, the vibration energy is concentrated on the protrusions 10c, 11c at any position in the axial direction of the multi-core shielded electric wire 1, so that the multi-core shielded electric wire Vibration energy to the multi-core shielded electric wire 1 can be reduced uniformly in one axial direction.

In the above embodiment, the projections 10c, 11
Since c is provided on both of the pair of resin members 10 and 11 and at the position where the joining surfaces 10a and 11a face each other, the pair of resin members 10 and 11 can be formed in the same shape. There are advantages such as a reduction in manufacturing costs of the resin members 10 and 111 and an easy handling of the resin members 10 and 11.

In the above embodiment, if a low-melting metal plated wire such as a tin-plated electric wire is used as the conductive wire 13a of the ground wire 13, the low-melting metal plated wire is partially melted by vibration energy, and the aluminum foil is formed. The contact with the covering member 6 improves the reliability of the contact point between the aluminum foil covering member 6 of the multi-core shielded electric wire 1 and the conductive wire 13a of the ground wire 13.

According to the above-described embodiment, the protrusions 10 are formed on both the joining surfaces 10a, 11a of the pair of resin members 10, 11.
c, 11c, one of the resin members 10,
11 may be provided only on the joint surfaces 10a and 11a.

According to the above-described embodiment, when the ground wire 13 is arranged between the resin member 10 and the multi-core shielded electric wire 1, the insulation sheath 13b is arranged without being stripped.
What peeled off the insulating outer skin 13b may be arranged.

According to the above-described embodiment, the shield covering member is constituted by the aluminum foil covering member 6, but may be constituted by a conductive metal foil other than aluminum.
Further, it may be constituted by a braided conductor.

Although the multi-core shielded electric wire 1 is provided with the drain wire 5 according to the embodiment, the multi-core shielded electric wire 1 may not be provided with the drain wire 5. However, if the drain line 5 is provided as in the above-described embodiment, the drain line 5 can be shielded by connecting it to the ground, so that there is an advantage that the number of variations in the shield measures increases accordingly.

According to the above-described embodiment, the multi-core shielded electric wire 1 has been described as having two shield cores 4. However, the present invention is similarly applied to a cable having three or more shield cores 4. Of course you can.

[0035]

As described above, according to the first aspect of the present invention, there is provided a multi-core shielded electric wire having a plurality of shield cores, a shield covering member covering the outer periphery thereof, and an insulating sheath covering the outer periphery thereof. A pair of resin members each having a concave portion in which a hole substantially corresponding to the outer cross-sectional shape of the multi-core shielded wire is provided; the multi-core shielded wire is sandwiched between the pair of resin members; And one end of the ground wire is interposed between the multi-core shielded electric wire and the resin member. In this state, ultrasonic vibration is applied while applying a compressive force between the pair of resin members, and at least the insulating outer cover is formed. The shield processing structure of a multi-core shielded wire in which the contact portion between the conductive wire of the ground wire and the shield coating member is formed by melting and scattering, and the inner space of the shield coating member is filled with a heat resistant insulating material. In this multi-core shielded wire shield processing structure, since a plurality of shield core wires are almost immovable due to the insulating material filled in the shield covering member, the shield core wire is placed between a pair of resin members when ultrasonic welding is performed. The position of the shield core is not affected by the pressure and ultrasonic vibration, and the outer periphery of the shield core is covered with a heat-resistant insulating material. It does not break,
Since the position of the shield covering member is also stabilized by the insulating material filled therein, the position of the shield covering member varies due to the pressure between the pair of resin members and ultrasonic vibration during ultrasonic welding. Not even. Therefore,
The short circuit between the ground wire and the core wire or between the core wires can be reliably prevented to improve the insulation performance, and the electrical contact between the ground wire and the shield covering member can be surely obtained. The performance can be improved.

According to the second aspect of the present invention, a multi-core shielded wire having a plurality of shielded core wires, a shield covering member covering the outer periphery thereof, and an insulating sheath covering the outer periphery thereof, and an outer cross-sectional shape of the multi-core shielded wire A pair of resin members each having a recess in which a receiving hole substantially corresponding to is formed, sandwiching the multi-core shielded wire between the pair of resin members, disposing the multi-core shielded wire in each recess, and One end of the ground wire is interposed between the multi-core shielded wire and the resin member. In this state, ultrasonic vibration is applied between the pair of resin members, and at least the insulating sheath is melted and scattered to shield the conductive wire of the ground wire and the shield. This is a method for shielding a multi-core shielded electric wire in which a shield member is electrically contacted with a sheathing member. The shielded wire uses a heat-resistant insulating material filled in an inner space of the shield sheathing member. In the shield processing method of the core shielded electric wire, since the plurality of shield core wires are almost immovable due to the insulating material filled inside the shield covering member, the pressure between the pair of resin members when ultrasonic welding is performed and Positional variation does not occur even with ultrasonic vibration, and since the outer circumference of the shield core wire is covered with a heat-resistant insulating material, the insulation inner sheath of the shield core wire is broken or cut by heat generated by ultrasonic vibration. In addition, the position of the shield covering member is also stabilized by the pressure between the pair of resin members and ultrasonic vibration during ultrasonic welding because the position of the shield covering member is stabilized by the insulating material filled therein. There is no variation in Therefore, it is possible to reliably prevent a short circuit between the ground wire and the core wire or between the core wires, to improve the insulation performance, and to reliably obtain the electrical contact between the ground wire and the shield covering member. As a result, the electric performance can be improved.

[Brief description of the drawings]

FIG. 1 shows one embodiment of the present invention, and is a cross-sectional view of a multi-core shielded electric wire.

FIG. 2 shows one embodiment of the present invention, and is a perspective view of a pair of resin members.

FIG. 3 is a view showing an embodiment of the present invention and showing an arrangement relationship of respective members at the time of ultrasonic vibration.

FIG. 4 is a view showing an embodiment of the present invention and showing a set state of each member immediately before ultrasonic vibration is applied.

FIG. 5 is a view showing one embodiment of the present invention and showing a shield processing structure obtained by ultrasonic vibration.

FIG. 6 shows one embodiment of the present invention, and is a perspective view of a multi-core shielded electric wire to which a shield processing structure is added.

FIG. 7 is a sectional view of a conventional shield processing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multi-core shielded electric wire 2 Core wire 3 Insulation inner sheath 4 Shield core wire 5 Drain wire 6 Aluminum foil covering member (Shield covering member) 7 Insulating sheath 8 Insulating material 10, 11 Resin member 10a, 11a Joining surface 10b, 11b Concave portion 10c, 11c Convex Part 13 Ground wire 13a Conductive wire 13b Insulated skin 15 Ultrasonic horn

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5G313 AA10 AB09 AC04 AD08 AE10 5G355 AA05 BA04 CA02 CA23 5G375 AA09 BA26 BB46 CA03 CA12

Claims (2)

[Claims] 1. A multi-layer cable comprising a plurality of shielded core wires whose core wires are covered with an insulating inner sheath, a conductive shield covering member for covering the outer periphery of the plurality of shield core wires, and an insulating sheath covering the outer periphery of the shield covering member. A core shielded electric wire, a pair of resin members each having a recess in which a hole substantially corresponding to the outer cross-sectional shape of the multi-core shielded electric wire is formed in a state where the joint surfaces of the core shielded electric wires are abutted with each other, and a ground wire; Sandwiching the multi-core shielded wire between a pair of resin members,
Placing the multi-core shielded wire in each of the recesses, and
One end side of the ground wire is interposed between the multi-core shielded wire and the resin member, and in this state, ultrasonic vibration is applied while applying a compressive force between the pair of resin members to melt at least the insulating sheath. A shield processing structure for a multi-core shielded electric wire in which a contact portion between a conductive wire of the ground wire and the shield covering member is formed, wherein the shield covering member includes a plurality of the shield core wires. A shield processing structure for multi-core shielded wires, characterized by filling the space with a heat-resistant insulating material. 2. A multi-layer cable comprising: a plurality of shield cores whose cores are covered with an insulating inner sheath; a shield covering member made of a conductor covering the outer periphery of the plurality of shield cores; and an insulating sheath covering the outer periphery of the shield covering member. A core shielded electric wire, a pair of resin members each having a recess in which a hole substantially corresponding to the outer cross-sectional shape of the multi-core shielded electric wire is formed in a state where the joint surfaces of the core shielded electric wires are abutted with each other, and a ground wire; Sandwiching the multi-core shielded wire between a pair of resin members,
Placing the multi-core shielded wire in each of the recesses, and
One end of the ground wire is interposed between the multi-core shielded wire and the resin member. In this state, ultrasonic vibration is applied between the pair of resin members, and at least the insulating sheath is melted and scattered to form the ground wire. A method of shielding a multi-core shielded wire for electrically contacting the conductive wire with the shield covering member, wherein the shielded wire is disposed in an inner space of the shield covering member where a plurality of the shield core wires are arranged. A method for shielding a multi-core shielded wire, characterized by using a material filled with a heat-resistant insulating material.