JP4691972B2 - Shielded wire and manufacturing method thereof - Google Patents

Description

  The present invention relates to a shielded wire for a vehicle used for an automobile device and a method for manufacturing the same.

  Shielded electric wires for vehicles used for automobile equipment and the like are required to flow a large current at a high voltage due to the popularization of hybrid vehicles and the electrification of equipment. Further, there is a demand for an electric wire that can save space when handling the wiring material.

  As shown in FIGS. 22 to 24, the shielded electric wire 70 includes an electric wire body 11 and a shield member 71.

  The electric wire body 11 includes a conductor 13 and an insulator 14 that covers the conductor 13. Connection terminals 22 are provided at both ends of the conductor 13, and the connection terminals 22 are crimped to the conductor 13. Reference numeral 72 denotes a crimp mark.

  The shield member 71 formed on the outer peripheral surface of the insulator 14 includes a braided shield 17 and an insulating shielded electric wire covering 25 that protects the braided shield 17. For the braided shield 17, a copper wire or tin-plated copper wire having a wire diameter of several tens to several hundreds of μm is used. A shield connector 23 is provided at the end of the shield member 71, and the shield connector 23 is grounded.

  As another member, a crimping ring 24 is provided on the outer periphery of the braided shield 17, and the end of the braided shield 17 that is folded back by the shield connector 23 is crimped.

  The shielded electric wire 70 is used for supplying electric power from a current transformation means (inverter) to a power transmission means (transmission) in, for example, automobile equipment. In that case, the electric wire main body 11 supplies electric power, and the shield member 71 exhibits a shielding effect that prevents malfunction due to electromagnetic waves or the like.

JP 2002-208456 A

  However, the shielded electric wire 70 has a problem such that muddy water, gravel, etc. flies and collides depending on the place where the shielded electric wire 70 is installed in an automobile or the like, and the shielded electric wire covering 25 may be damaged.

  Furthermore, when the shielded electric wire 70 is attached to a location close to the engine of the automobile, the shielded electric wire 70 is exposed to high temperatures and vibrations, so that there is a possibility that the shielded electric wire coating 25 may be cracked because it exceeds the limit of high temperature heat resistance. is there. Therefore, there has been a problem that moisture or the like enters the inside of the electric wire from the cracks, and the braided shield 17 is corroded to lower the shielding effect.

  Moreover, in the shielded electric wire 70 used for connection with a transmission, it is necessary to flow a large current through the electric wire body 11, and at this time, a current also flows through the braided shield 17 used as a shield member. For this reason, the braided shield 17 generates heat, and the resistance value of the braided shield 17 becomes high at the connection portion between the braided shield 17 and the shield connector 24. When the braided shield 17 generates heat, the temperature of the insulator 14 also rises, causing a problem that the insulator 14 is cracked.

  The shielded electric wire 70 is hard because it uses a heat-resistant material for the insulator 14, and is difficult to bend because the electric wire body 11 is directly wound with a braided wire. For this reason, it is difficult to handle when attaching to an automobile or the like, and the shielded electric wire 10 is made into a shape that has been bent in advance, or the shielded electric wire 10 is inserted into a plastic mold molded for wiring before wiring. There is a need to.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a shielded electric wire that can solve the above-described problems, has high durability against vibration and high temperature, and can be easily attached, and a method for manufacturing the same.

In order to achieve the above object, the invention of claim 1 is directed to an electric wire body composed of a conductor made of a single wire or a stranded wire and an insulator covering the conductor, and a shield member provided on the outer periphery of the electric wire body. in the shielded wire with bets, the shield member is, around the first sleeve, sequentially, a cylindrical body provided with a braided shield and the second sleeve, a metal pipe that is provided is connected to the tubular body A shielded electric wire in which the braided shield is fused and joined to the metal pipe and the second sleeve at the connecting portion, and the cylindrical body and the metal pipe are electrically connected.

  The invention according to claim 2 is the shielded electric wire according to claim 1, wherein the shield member is formed by abutting one end of the metal pipe between the second sleeve and the braided shield.

The invention of claim 3 is a shielded electric wire comprising an electric wire body composed of a conductor made of a single wire or a stranded wire and an insulator covering the conductor, and a shield member provided on the outer periphery of the electric wire body. The shield member includes a braided shield, a metal pipe, and a connection member, and the connection member includes a first sleeve, a second sleeve provided on an outer periphery of the first sleeve, and the first sleeve. and a connecting portion for connecting the second sleeve, one end side of the connecting member, the gap between the first sleeve and the second sleeve is inserted one end of the braided shield, the braid the shield melted joined to the second sleeve, and fusion bonded to the other end side of the second sleeve of the metal pipe and the connecting member, electrically the connecting member and the metal pipe A shielded wire connected.

  According to a fourth aspect of the present invention, the first sleeve and the second sleeve are connected to each other in the middle in the longitudinal direction, and the gap between the first sleeve and the second sleeve on the other end side of the connection member is formed. The shielded electric wire according to claim 3, wherein one end of the metal pipe is inserted.

  A fifth aspect of the present invention is the shielded electric wire according to any one of the first to fourth aspects, wherein the metal pipe is made of aluminum or an aluminum alloy.

  A sixth aspect of the present invention is the shielded electric wire according to any one of the first to fifth aspects, wherein the braided shield is formed of aluminum or an aluminum alloy.

  A seventh aspect of the present invention is the shielded electric wire according to any one of the first to sixth aspects, wherein a hollow portion is formed between the shield member and the electric wire body.

  The invention according to claim 8 is the shielded electric wire according to any one of claims 1 to 7, wherein the first sleeve, the braided shield, and the second sleeve are crimped.

  A ninth aspect of the present invention is the shielded electric wire according to any one of the first to eighth aspects, wherein the metal pipe is bent and formed in a state where the electric wire main body is inserted therein.

The invention of claim 10, the braided shield is covered to the outside of the first sleeve, the outside of the braided shield is covered with a second sleeve, said first sleeve, consisting of the braided shield and the second sleeve forming a tubular body, the first sleeve is pressed from the outside and the inside of the cylindrical body, a step of mechanically connecting the braided shield and the second sleeve, the interior of the metal pipe, single wire material or a conductor made of twisted wire, a step of inserting the electric wire body composed of an insulator covering the periphery of the conductor, and the braided shield and the said second sleeve and the metal pipe by fusion bonding, respectively above A method of manufacturing a shielded electric wire including a step of electrically connecting a cylindrical body and the metal pipe to form a shield member.

  The invention of claim 11 is the method for producing a shielded electric wire according to claim 10, wherein the braided shield and the second sleeve are joined to the metal pipe in a state where the braided shield is expanded to the outside of the metal pipe.

The invention of claim 12 includes the steps of forming a first second sleeves one connecting member is formed integrally via the connecting portion of the outer periphery of the sleeve, braid at one end of the gap of the connecting members A step of inserting one end of the shield, a step of mechanically joining the first sleeve, the braided shield, and the second sleeve; and a melt joining of the braided shield and the second sleeve. A step of inserting an electric wire body composed of a step, a conductor made of a single wire or a stranded wire, and an insulator covering the outer periphery of the conductor into the inside of the metal pipe, and the other end side of the connection member Inserting the metal pipe into the gap, and forming a shield member by electrically connecting the metal pipe and the connecting member by fusion-bonding the metal pipe with the second sleeve. Including sea It is a manufacturing method of de wire.

  The invention according to claim 13 includes the step of electrically connecting the first sleeve, the second sleeve and the braided shield immediately before the step of inserting the electric wire body into the metal pipe. It is a manufacturing method of an electric wire.

  According to the present invention, excellent effects such as high durability against vibration and high temperature and easy attachment are exhibited.

  Hereinafter, a preferred first embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  1 to 4 are a plan view and a sectional view showing a preferred embodiment of a shielded electric wire according to the present invention.

  The shielded electric wire 10 according to the present embodiment includes an electric wire body 11 and a shield member 12.

  The electric wire body 11 includes a conductor 13 and an insulator 14 that covers the conductor 13. The conductor 13 is formed of a single wire material or a stranded wire material obtained by twisting a plurality of single wires.

In the present embodiment, as the conductor 13, a stranded wire material in which 19 stranded wires of a tin-plated copper wire having a diameter of 0.32 mm are further twisted is used. The insulator 14 was formed using Freon Rex. Thereby, the cross-sectional area of the electric wire main body 11 was set to 30 mm ² .

  Connection terminals 22 are provided at both ends of the electric wire body 11. The connection terminal 22 is directly attached to the conductor 13 of the electric wire body 11 subjected to terminal processing. 38-S6 (inner diameter 9.4 mm, outer diameter 13.3 mm, length 14 mm) was used for the connection terminal 22.

  The shield member 12, which is a feature of the shielded electric wire 10 of the present embodiment, includes a metal cylinder 15 and a metal pipe 19 provided so as to face the cylinder 15. The cylinder 15 and the metal pipe 19 are Electrically connected.

  The cylindrical body 15 is configured such that a braided shield 17 is provided on the outer periphery of a cylindrical first sleeve (inner sleeve) 16, and a second sleeve (outer sleeve) 18 is provided on the outer periphery of the braided shield 17. . The inner sleeve 16 and the outer sleeve 18 are formed shorter than the braided shield 17 and are members for joining the braided shield 17 and the metal pipe 19.

  The shield member 12 is provided at a distance from the electric wire body 11, and a hollow portion 21 is formed between the electric wire body 11 and the shield member 12.

  The outer periphery of the braided shield 17 that is not joined to the metal pipe 19 (left side in FIG. 1) is covered with the shielded electric wire coating 25. The end of the braided shield 17 is folded back by a shield connector 23, and the end thereof is crimped together with a shielded electric wire covering 25 by a crimping ring 24. The shield connector 23 includes a grounding terminal, and the braided shield 17 is grounded through the terminal.

  The other end 28 of the metal pipe 19 has a larger diameter than other portions of the shield member 12. This is because the shielded electric wire 10 is matched to the shape of the equipment to which it is connected.

Moreover, the side (right side in FIG. 1) joined to the metal pipe 19 of the cylindrical body 15 is formed in a cylindrical shape, and the connection terminal side (left side in FIG. 1) is crimped into a substantially regular hexagonal section (press Processed). Since the side of the cylindrical body 15 to be joined with the metal pipe is melt-joined with the cylindrical metal pipe 19, the cross section is formed in a circular shape in accordance with the shape of the metal pipe 19. On the connection terminal side, since the insulating shield wire coating 25 is in contact with the braided shield 17, the cylinder 15 may be crimped into a polygonal cross section. By crimping, the minute gap in the braided shield 17 is reduced, and the mechanical strength of the cylinder 15 and the contact area between the braided shield 17, the inner sleeve 16 and the outer sleeve 18 are increased.

  FIG. 5 is an enlarged cross-sectional view of the vicinity of the joint between the metal pipe 19 and the cylindrical body 15, and details thereof will be described.

  As shown in FIG. 5, in the cylindrical body 15, the inner sleeve 16 and the braided shield 17 are protruded from the distal end of the outer sleeve 18, and the braided shield 17 is expanded outward. The metal pipe 19 is abutted between the inner sleeve 16 and the braided shield 17. That is, the metal pipe 19 is directly joined to the inner sleeve 16 and the braided shield 17, and is joined to the outer sleeve 18 via the braided shield 17. Further, a portion where the braided shield 17, the outer sleeve 18 and the metal pipe 19 are in contact with each other is melt-bonded to form a melt-bonded portion 20. The fusion bonding is performed over the entire circumference of the shield member 12.

  The shield member 12 only needs to be electrically connected (conductively coupled) to the cylindrical body 15 and the metal pipe 19. For example, as shown in FIG. 6A, the end of the braided shield 17 may be folded back to the outside of the outer sleeve 18. Further, as shown in FIG. 6B, the metal pipe 19 may be directly joined to the braided shield 17 and the outer sleeve 18 without bending the braided shield 17, and as shown in FIG. The pipe 19 may be joined only with the outer sleeve 18. It is desirable that the shield member 12 has a connection structure as shown in FIG.

  The metal pipe 19 is preferably formed of aluminum or an aluminum alloy. In the present embodiment, an aluminum alloy A6063 (JIS standard) (Al—Si—Mg alloy) having an inner diameter of 10 mm and a wall thickness of 1 mm is used as the metal pipe. This aluminum alloy is excellent in corrosion resistance and brazing.

  The braided shield 17 is preferably formed of aluminum or an aluminum alloy. In the present embodiment, the braided shield 17 is formed of a braid made of an aluminum alloy of Al—Fe—Zr (diameter 0.18 mm). The aluminum alloy is excellent in heat resistance and bending resistance.

  The inner sleeve 16 is preferably made of stainless steel.

  In the present embodiment, stainless steel SUS304 (JIS standard) is used as the inner sleeve 16. As the outer sleeve 18, an aluminum alloy A6063 (JIS standard) (Al-Si-Mg alloy) was used.

  The shielded electric wire 10 according to the present embodiment includes a shield member 12 in which a main part is formed of a metal pipe 19 and a cylindrical body 15 is joined thereto. Therefore, even when exposed to high temperatures, the metal pipe 19 generates heat. Conduction and heat dissipation to the outside can prevent damage due to high heat. Furthermore, since the space between the shield member 12 and the electric wire body 11 is hollow, the effect can be further enhanced.

  In addition, since the main part of the shield member 12 is constituted by the metal pipe 19, the coating of the shield member 12 is not damaged by vibration or gravel flying from the outside, and a high shielding effect is maintained. Can do.

  When a shielded wire is used to connect a transmission of an automobile device to an inverter, the shield member 12 does not include the cylindrical body 15 and is formed of only the metal pipe 19. concentrate. In the present embodiment, the cylindrical body 15 is joined to the metal pipe 19 to have a flexible structure, so that the side (left side in FIG. 1) where the shield member 12 is configured by the cylindrical body 15 is connected to the inverter side. By connecting the side formed by the metal pipe 19 to the transmission side, it is possible to avoid the concentration of impact due to vibration. Furthermore, since the transmission side is exposed to a high temperature, it is possible to prevent breakage due to heat generation by using the metal pipe 19 formed of a metal with high heat dissipation.

  Moreover, since the main part of the shield member 12 is comprised by the metal pipe 19, and between the shield member 12 and the electric wire main body 11 is made into the hollow 21, the shielded electric wire 10 is easy to bend. Therefore, when the shielded electric wire 10 is attached to the vehicle body or the like, the handling can be facilitated.

  By using aluminum or an aluminum alloy as a material for forming the metal pipe 19, it is possible to protect the electric wire body 11 from external heat radiation and to efficiently dissipate heat generated by the braided shield 17.

  By forming the braided shield 17 together with the metal pipe 19 from aluminum or an aluminum alloy, the metal pipe 19 and the braided shield 17 are joined between the same type of metals. When different types of metals are bonded, moisture may adhere to the bonded portion and cause corrosion of the metal. Therefore, by using the same type of metal-to-metal bonding, metal corrosion at the bonded portion can be prevented.

  Since stainless steel is less likely to bend than aluminum or the like, after the cylinder 15 including the inner sleeve 16 is crimped, the processed shape can be maintained. Further, when the inner sleeve 16 and the metal pipe 19 are melt-bonded, the inner wire body 11 can be melt-bonded without giving a thermal effect.

  When the shielded electric wire 10 is used, a large current flows through the braided shield 17. Therefore, when the fusion bonding is not performed, a gap is generated in the bonding portion 10 and the resistance at the bonding portion is increased. When the resistance at the joint becomes high, heat is generated in the braided shield 17 and the shield member may break at the joint. Therefore, by melt-bonding the metal pipe 19 and the cylindrical body 15, the gap in the shield member 12 can be eliminated, and corrosion and heat generation at the bonded portion can be suppressed.

  Next, the manufacturing method of the shielded electric wire of this Embodiment is demonstrated.

  First, as shown in FIGS. 7 (a) and 7 (b), the braided shield 17 and the second sleeve (outer sleeve) are arranged in order, with the cylindrical first sleeve (inner sleeve) 16 being the innermost side. ) 18 and the cylinder 15 are formed. At this time, the tips of the members 16 to 18 are arranged in the order of the inner sleeve 16, the braided shield 17, and the outer sleeve 18.

  As shown in FIG. 8, about half of the longitudinal direction of the outer sleeve 18 is placed in a compression die 31 having a hexagonal shape in the hole, the compression die 31 is tightened, and the outer sleeve 18 is pressed from the outside. Further, after the outer sleeve 18 is pressed, a prismatic compression die 32 is inserted into the inner sleeve 16 and the cylinder 15 is pressed from the outside and inside thereof, so that the inner sleeve 16, the braided shield 17 and The outer sleeve 18 is pressed and mechanically joined. Thereby, as shown to Fig.9 (a) and FIG.9 (b), as for the cylinder 15, the one end side is formed in a cross-sectional circular shape, and the other end side is formed in a cross-sectional hexagonal shape.

  On the other hand, the electric wire body 11 is inserted into the metal pipe 19 as shown in FIG. At this time, the metal pipe 19 may be bent and formed while the electric wire body 11 is inserted.

  As shown in FIG. 10, the electric wire body 11 is also inserted into the cylindrical body 15. At this time, the circular cross section of the cylindrical body 15 is positioned on the metal pipe 19 side.

  As shown in FIG. 11, the cylindrical body 15 and the metal pipe 19 are abutted. At this time, the braided shield 17 to be joined is spread outward, and one end of the metal pipe 19 is abutted between the braided shield 17 and the inner sleeve 16. The braided shield 17 is sandwiched between the metal pipe 19 and the outer sleeve 18 at the joint, and the contact area between the metal pipe 19 and the outer sleeve 18 and the braided shield 17 increases.

  As shown in FIG. 12, the cylindrical body 15 and the metal pipe 19 are melt-bonded to form a melt-bonded portion 20. Specifically, the laser welding machine head 35 of the laser welding machine 34 is applied to a place (joining portion 20) where the end face of the outer sleeve 18 and the end face of the metal pipe 19 are in contact with each other via the braided shield 17, and the shield member 12 is touched. Weld all around. In the present embodiment, welding is performed using laser welding (YAG laser welding). Finally, a wire terminal member such as a connection terminal is provided and completed.

  According to the shielded wire manufacturing method of the present embodiment, the shielded wire 10 can be obtained.

  In the present embodiment, the cylindrical body 15 and the metal pipe 19 are melt-bonded by laser welding, but other welding methods may be used. For example, electron beam welding, TIG welding, MIG welding, etc. are mentioned.

  Since electron beam welding is performed in a vacuum chamber, the generation of oxides can be suppressed, and heat effects other than the melted portion can be reduced. TIG welding has the advantages of preventing oxidation with a shielding gas and allowing the apparatus to be installed simply and inexpensively. MIG welding prevents oxidation with a shield gas and can be welded while supplying a weld metal, so that a braided shield formed of a braided wire can be pressed with molten metal.

  When the cylindrical body 15 and the metal pipe 19 are brought into contact with each other, as shown in FIG. 13 (a), the braided shield 17 is folded back to the outside of the outer sleeve 18, and then the cylindrical body 15 and the cylindrical body 15 as shown in FIG. The metal pipe 19 may be joined (see the enlarged sectional view 6 (a)).

  Further, as shown in FIG. 14A, after the braided shield 17 is put inside the metal pipe 19, the cylindrical body 15 and the metal pipe 19 may be joined as shown in FIG. 14B (enlarged). (See cross-sectional view 6 (b)). As shown in FIG. 15A, the metal pipe has a large inner diameter so that the outer sleeve 18 and the braided shield 17 are located in the pipe of the metal pipe 19, that is, the outer sleeve 18 is in contact with the inner wall of the metal pipe 19. Then, as shown in FIG. 15B, the cylinder 15 and the metal pipe 19 may be joined (see an enlarged cross-sectional view 6C).

  The metal pipe 19 is bent with the wire body 11 inserted therein and then welded to the cylinder 15. However, the metal pipe 19 may be bent after welding to the cylinder 15.

  Next, a shielded electric wire according to a preferred second embodiment of the present invention will be described.

  The basic components are substantially the same as those of the shielded electric wire 10 of FIG. 1 described above, and the same components are denoted by the same reference numerals as in FIG. Instead of connecting the pipe 19, a connection member for connecting the braided shield 17 and the metal pipe 19 is provided.

  As shown in FIG. 16, the shield member 51, which is a feature of the shielded electric wire 50 of the present embodiment, includes the braided shield 17, the metal pipe 19, and the connection member 52. The connection member 52 includes a first cylindrical sleeve (inner sleeve) 53 and a second cylindrical sleeve (outer sleeve) 54 provided on the outer periphery of the first sleeve 53 connected by a connecting portion 55. Has been formed.

  In the present embodiment, a ring-shaped connecting portion 55 is formed at the longitudinal intermediate portion between the first sleeve 53 and the second sleeve 54 to form the connecting member 52 that connects the inner sleeve 53 and the outer sleeve 54.

  A gap between the inner sleeve 53 and the outer sleeve 54 is separated into two gaps 56 and 57 by a connecting portion 55. One end of the braided shield 17 is inserted into one gap 56, and one end of the metal pipe 19 is inserted into the other gap 57. Since the connection member 52 is made of metal, the braided shield 17 and the metal pipe 19 are electrically connected via the connection member 52.

  Since the braided shield 17 and the connection member 52 are pressure-bonded to the shielded electric wire 50, the contact area between the braided shield 17 and the connection member 52 is large. Further, the braided shield 17 and the connection member 52 are melt-bonded to form a first melt-bonded portion 58.

  Since the metal pipe 19 and the connecting member 52 are also MIG melt bonded to the entire circumference of the shield member 51 to form the second melt bonded portion 59, they are strongly mechanically and electrically bonded.

  The shielded electric wire 50 according to the present embodiment has the same effects as the shielded electric wire 10 described above. Further, the connecting member 52 is formed by connecting the inner sleeve 53 and the outer sleeve 54 integrally, and the braided shield 17 and the metal pipe 19 are inserted into the gaps 56 and 57 and welded, respectively. The connection between the shield 17 and the metal pipe 19 becomes stronger and the durability is improved.

  The connecting member 52 may have a structure in which the braided shield 17 is sandwiched between the inner sleeve 53 and the outer sleeve 54 and the metal pipe 19 is electrically connected to at least one of the sleeves 53 and 54.

  For example, as shown in FIG. 21, the connecting member 61 may be formed by connecting an inner sleeve 62 and an outer sleeve 63 near the end face. In this case, the braided shield 17 is inserted into the gap of the connecting member 61, and the metal pipe 19 is welded to the connecting portion 64 side of the outer sleeve 63 to form the shield member 65.

  Next, the manufacturing method of the shielded electric wire 50 of this Embodiment is demonstrated.

  As shown in FIG. 17, first, the connection member 52 is formed by casting or the like, and then the braided shield 17 is inserted into one gap 56.

  As shown in FIG. 18, a cylindrical jig 60 is arranged in the tube of the inner sleeve 53, and the connecting member 52 is pressed from the outside of the outer sleeve 54 and from the side where the braided shield 17 is inserted. 53, the braided shield 17 and the outer sleeve 54 are pressure-bonded. Accordingly, the contact area between the braided shield 17 and the connection member 52 is increased, and the braided shield 17 is mechanically firmly fixed to the connection member 52.

  Next, as shown in FIG. 19, a part of the outer sleeve 54 and the braided shield 17 may be partially melt-bonded to form a first melt-bonded portion 58. At this time, fusion bonding is performed all around the outer sleeve 54. Examples of the joining method include resistance welding, TIG welding, MIG welding, electron beam welding, and laser welding. When a part of the connection member 52 and the braided shield 17 are welded so as to form the first fusion joint 58, the braided shield 17 and the connection member 52 are in good electrical connection (ohmic contact). In addition to fusion bonding, solid phase diffusion bonding, such as ultrasonic bonding, friction diffusion bonding (FSW), clinching, or the like may be performed.

  On the other hand, the electric wire body 11 is inserted into the metal pipe 19. At this time, the metal pipe 19 may be bent and formed while the electric wire body 11 is inserted.

  As shown in FIG. 20, the metal pipe 19 is inserted into the other gap 57 between the inner sleeve 53 and the outer sleeve 54. At this time, the electric wire body 11 is inserted into the joined body of the connecting member 52 and the braided shield 17.

  Next, the metal pipe 19 and the end of the outer sleeve 54 are melt-bonded to form a second melt-bonded portion 59. The melt bonding in this step may be performed by the same welding method as when the first melt bonding portion 58 is formed. In the present embodiment, the melt bonding is performed by the MIG welding method. Further, the fusion bonding is performed on the entire circumference of the shield member 51.

  After welding, the metal pipe 19 and the braided shield 17 are covered with an insulating member. For example, the outer periphery of the metal pipe 19 and the braided shield 17 is covered with a heat shrink tube, and the heat shrink tube is heated by hot blow or the like. The heated heat-shrinkable tube contracts and adheres to the metal pipe 19 and the braided shield 17.

  Finally, members other than the electric wire body 11 and the shield member 51 can be provided to obtain the shielded electric wire 50 described above.

It is a top view which shows the shielded electric wire of suitable 1st Embodiment which concerns on this invention. It is the 2A-2A sectional view taken on the line of FIG. It is the 3A-3A sectional view taken on the line of FIG. It is the 4A-4A sectional view taken on the line of FIG. FIG. 2 is an enlarged cross-sectional view in the vicinity of a joint portion in FIG. 1. FIG. 6A to FIG. 6C are enlarged cross-sectional views showing modifications of the joint portion of FIG. It is a figure explaining the manufacturing method of the shielded electric wire of FIG. 1, Fig.7 (a) is a top view of the cylinder before a crimping process, FIG.7 (b) is the 7B-7B line | wire of Fig.7 (a). It is sectional drawing. It is sectional drawing explaining the crimping | compression-bonding process of the cylinder of the manufacturing method of the shielded electric wire of FIG. It is a figure explaining the manufacturing method of the shielded electric wire of FIG. 1, Fig.9 (a) is a top view of the cylinder after a crimping process, FIG.9 (b) is the 9B-9B line | wire of FIG.9 (a). It is sectional drawing. It is a top view explaining the insertion process of the electric wire main body to the cylinder of the manufacturing method of the shielded electric wire of FIG. It is a top view explaining the joining process of the manufacturing method of the shielded electric wire of FIG. It is a top view explaining the fusion | melting joining process of the manufacturing method of the shield wire of FIG. FIG. 13A and FIG. 13B are plan views for explaining a modification of the joining step of the shielded wire manufacturing method. FIG. 14A and FIG. 14B are plan views for explaining a modification of the joining step of the shielded wire manufacturing method. Fig.15 (a) and FIG.15 (b) are top views explaining the modification of the joining process of the manufacturing method of a shielded electric wire. It is a top view which shows the shielded electric wire of suitable 2nd Embodiment which concerns on this invention. It is sectional drawing explaining the process of joining the connection member and braided shield of the manufacturing method of the shielded electric wire of FIG. It is sectional drawing explaining the crimping | compression-bonding process of the shield member of the manufacturing method of the shielded electric wire of FIG. It is sectional drawing explaining the fusion | melting connection process of the connection member of the manufacturing method of the shielded electric wire of FIG. 16, and a braided shield. It is sectional drawing explaining the fusion | melting connection process of the connection member of the manufacturing method of the shielded electric wire of FIG. 16, and a metal pipe. It is sectional drawing which shows the modification of the shield wire of FIG. It is a side view which shows the conventional shielded electric wire. It is a 23A-23A sectional view taken on the line of FIG. It is the 24A-24A sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Shielded electric wire 11 Electric wire main body 12 Shield member 13 Conductor 14 Insulator 15 Cylindrical body 16 First sleeve 17 Braided shield 18 Second sleeve 19 Metal pipe

Claims (13)

In a shielded electric wire comprising a wire body composed of a conductor made of a single wire or a stranded wire and an insulator covering the conductor, and a shield member provided on the outer periphery of the wire body,
The shield member, around the first sleeve, sequentially, is constituted by a cylindrical body provided with a braided shield and the second sleeve, a metallic pipe provided connected to the tubular body, in the connecting portion A shielded electric wire, wherein the braided shield is melt-bonded to the metal pipe and the second sleeve, and the cylindrical body and the metal pipe are electrically connected. The shielded wire according to claim 1, wherein the shield member is formed by abutting one end of a metal pipe between the second sleeve and the braided shield. In a shielded electric wire comprising a wire body composed of a conductor made of a single wire or a stranded wire and an insulator covering the conductor, and a shield member provided on the outer periphery of the wire body,
The shield member includes a braided shield, a metal pipe, and a connection member, and the connection member includes a first sleeve, a second sleeve provided on an outer periphery of the first sleeve, and the first sleeve. and a connecting portion for connecting the second sleeve, one end side of the connecting member, the gap between the first sleeve and the second sleeve is inserted one end of the braided shield, the braid The shield is melt-bonded to the second sleeve, the metal pipe and the second sleeve on the other end side of the connection member are melt-bonded, and the connection member and the metal pipe are electrically connected. Shielded electric wire characterized by The first sleeve and the second sleeve are connected at their longitudinal intermediate portions, and one end of a metal pipe is inserted into the gap between the first sleeve and the second sleeve on the other end side of the connecting member. The shielded electric wire according to claim 3. The shielded electric wire according to any one of claims 1 to 4, wherein the metal pipe is formed of aluminum or an aluminum alloy. The shielded wire according to any one of claims 1 to 5, wherein the braided shield is formed of aluminum or an aluminum alloy. The shielded electric wire according to any one of claims 1 to 6, wherein a hollow portion is formed between the shield member and the electric wire main body. The shielded electric wire according to any one of claims 1 to 7, wherein the first sleeve, the braided shield, and the second sleeve are crimped. The shielded electric wire according to any one of claims 1 to 8, wherein the metal pipe is bent and formed with the electric wire main body inserted therein. The braided shield is covered to the outside of the first sleeve, the steps of the outside of the braided shield is covered with the second sleeve, forming the first sleeve, the cylindrical body consisting of the braided shield and the second sleeve the presses from the outside and the inside of the cylindrical body first sleeve, the step of mechanically connecting the braided shield and the second sleeve, the interior of the metal pipe, conductor made of a single wire material or twisted wire And a step of inserting an electric wire body composed of an insulator covering the periphery of the conductor, and the braided shield, the second sleeve, and the metal pipe are melt- bonded to each other , and the cylindrical body and the metal pipe And a step of forming a shield member. The manufacturing method of the shielded electric wire according to claim 10, wherein the braided shield and the second sleeve are joined to the metal pipe in a state where the braided shield is expanded to the outside of the metal pipe. Forming a connecting member integrally formed with the second sleeves through one of the connecting portion to the outer periphery of the first sleeve,
Inserting one end of the braided shield into the gap on one end side of the connecting member;
Mechanically joining the first sleeve, the braided shield, and the second sleeve;
A step of fusion bonding the above braided shield and the second sleeve, a conductor made of a single wire material or twisted wire, the electric wire body composed of an insulator covering the outer periphery of the conductor, internal metallic pipe A process of passing through,
Inserting the metal pipe into the gap on the other end side of the connecting member;
Forming a shield member by electrically connecting the metal pipe and the connecting member by melt-bonding the metal pipe to the second sleeve. . The manufacturing method of the shielded electric wire according to claim 12, further comprising a step of electrically connecting the first sleeve, the second sleeve and the braided shield immediately before the step of inserting the electric wire main body into the metal pipe.

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