JP6229805B2 - Shield conductive path - Google Patents

Description

  The present invention relates to a shield conductive path.

  Patent Document 1 discloses a shield conductive path including a metal pipe and an electric wire inserted into the pipe. In this type of shield conductive path, a flexible tubular braided wire is fixed to both ends of the pipe. By inserting the electric wire led out from both ends of the pipe into the braided wire, the both ends of the electric wire can be bent and routed. When the shield conductive path is for high voltage in a hybrid vehicle or the like, the pipe is painted orange.

JP 2007-081158 A

  In the portion where the braided wire is fixed to the pipe, the outer periphery of the pipe is covered with the braided wire and the outer periphery of the braided wire is covered with the caulking ring. For this reason, the outer diameter increases, and the outer diameter of the exterior body increases accordingly.

  This invention is completed based on the above situations, Comprising: It aims at reducing the diameter of the adhering part of a pipe and a braided wire.

The shield conductive path of the present invention has a form in which a conductive shield layer is laminated on a non-metallic pipe body, a pipe having a shielding function, a reduced diameter part formed on the outer periphery of the pipe, and a base end part A braided wire having a shielding function arranged so as to surround the outer periphery of the reduced diameter portion, and arranged so as to surround the outer periphery of the base end portion of the braided wire so that the braided wire is connected to the reduced diameter portion. a crimping ring for fixing, and a inserted through the conduction path main body into said pipe and said braided wire, the inner diameter of the reduced diameter portion, the inner diameter of the formed portion not of the reduced diameter portion of the pipe Only the conductive path main body is inserted inside the reduced diameter portion .

  Since the fixed portion of the pipe with the braided wire is a reduced diameter portion having a reduced outer diameter, the fixed portion of the pipe and the braided wire can be reduced in diameter.

In Example 1, the external view showing the pipe and braided wire of the state which is not surrounded by the exterior body. The external view of a shield conductive path. The partial expanded side sectional view of a shield conductive path. XX sectional drawing of FIG. FIG. 6 is an external view of a shield conductive path of Example 2. The partial expanded side sectional view of a shield conductive path. FIG. 9 is a partially enlarged side sectional view of a shield conductive path of Example 3.

(A) In the shield conductive path of the present invention, an inner diameter of the reduced diameter portion may be smaller than an inner diameter of a portion of the pipe where the reduced diameter portion is not formed.
(B) The shield conductive path of the present invention may be a range in which the formation region in the axial direction of the reduced diameter portion reaches the end face of the pipe. According to this configuration, the outer diameter of the region surrounding the pipe in the braided wire is necessarily smaller than the outer diameter of the region other than the reduced diameter portion of the pipe.

  (C) In the shield conductive path of the present invention, a large-diameter portion having an outer diameter larger than that of the reduced diameter portion is formed in a region closer to the end portion of the pipe than the reduced diameter portion of the outer periphery of the pipe. It may be. According to this configuration, it is possible to perform various processes such as connecting other members to a region of the pipe that is closer to the end than the caulking.

  (D) The shield conductive path of the present invention may include an exterior body that surrounds the fixed portion of the pipe with the braided wire and the entire region of the braided wire. According to this configuration, the braided wire can be protected from foreign matter interference and the like.

  (E) In the shield conductive path of the present invention, in (d), a pair of the reduced diameter portions are formed at both ends of the pipe, and the braided wire is fixed to the pair of reduced diameter portions, respectively. The exterior body may be a single member that surrounds the entire length of the pipe and the entire length of the pair of braided wires. According to this structure, compared with the case where two braided wires are enclosed by separate exterior bodies, the number of parts can be reduced.

  (F) In the shield conductive path of the present invention, in (e), the exterior body may be a corrugated tube having a bellows shape over its entire length. According to this configuration, since an existing corrugated tube can be used as the exterior body, the cost can be reduced.

  (G) The shield conductive path of the present invention is the shield conductive path according to (e), wherein the exterior body has a constant diameter and surrounds the pipe, and a pair of bellows that surrounds the two braided wires. And may be provided. According to this configuration, after inserting the pipe into the exterior body, the constant diameter portion can be bent together with the pipe.

  (H) In the shield conductive path of the present invention, in (e) to (g), the exterior body may be orange. According to this configuration, it is possible to omit the step of painting the pipe in orange, so that the cost can be reduced.

<Example 1>
Embodiment 1 of the present invention will be described below with reference to FIGS. The shield conductive path A of the first embodiment is arranged between the battery 20 and the inverter device 21 in, for example, a hybrid vehicle or an electric vehicle. The shield conductive path A includes a single pipe 10, two braided wires 14, a caulking ring 16, a single conductive path main body 17, and an exterior body 19.

  The pipe 10 is made of a single type of metal material and has a circular cross-sectional shape. The thickness of the pipe 10 is constant over the entire area of the pipe 10. The pipe 10 exhibits a shielding function. Since the pipe 10 is routed along the lower surface of a vehicle body (not shown) of the automobile, the pipe 10 is bent in accordance with the shape of the lower surface of the vehicle body. The process of bending the pipe 10 is performed in a state where the conductive path main body 17 is inserted into the pipe 10.

  Reduced diameter portions 11 are formed at both ends of the pipe 10. In the pipe 10, almost the area where the reduced diameter portion 11 is not formed is a non-reduced diameter area 12. The cross-sectional shape of the reduced diameter portion 11 is a concentric circle with the non-reduced diameter region 12. The outer diameter and inner diameter of the reduced diameter portion 11 are smaller than the outer diameter and inner diameter of the non-reduced diameter region 12, respectively. Further, the thickness of the reduced diameter portion 11 is slightly thinner than the thickness of the non-reduced diameter region 12. The formation region of the reduced diameter portion 11 in the axial direction of the pipe 10 is a range from the end portion of the non-reduced diameter region 12 to the end surface 13 of the pipe 10.

  The braided wire 14 is formed by braiding a plurality of metal strands (not shown) into a net shape. In a state where the braided wire 14 is fixed to the pipe 10, the braided wire 14 has a cylindrical shape. The braided wire 14 has flexibility and exhibits a shielding function. The proximal end portion 15 of the braided wire 14 surrounds the braided wire 14 in contact with the outer periphery of the reduced diameter portion 11. However, the range in which the proximal end portion 15 of the braided wire 14 is surrounded is only the reduced diameter portion 11, and the non-reduced diameter region 12 is not included in the surroundings. A base end portion 15 of the braided wire 14 is fixed to the reduced diameter portion 11 so as to be conductive by a caulking ring 16 described later. Most regions of the braided wire 14 excluding the base end portion 15 are extended from the end portion of the pipe 10.

  The caulking ring 16 is made of metal and is used as a means for fixing the braided wire 14 and the pipe 10 together. In the fixed state, the caulking ring 16 is arranged so as to surround the outer periphery of the proximal end portion 15 of the braided wire 14. In other words, the base end portion 15 of the braided wire 14 is sandwiched in the radial direction between the reduced diameter portion 11 and the caulking ring 16 of the pipe 10, and the base end portion 15 of the braided wire 14 is thereby sandwiched. Is fixed to the reduced diameter portion 11. In the fixed state, the outer periphery of the caulking ring 16 has a substantially circular shape concentric with the pipe 10. Further, the outer diameter of the caulking ring 16 is slightly larger than the outer diameter of the non-reduced region 12 of the pipe 10.

  Before starting the process of fixing the braided wire 14 and the pipe 10 with the caulking ring 16, the reduced diameter portion 11 is not formed in the pipe 10, and the outer diameter of the pipe 10 is constant over the entire length. In the fixing step, the end portion of the braided wire 14 is covered with the end portion of the pipe 10, and the crimping ring 16 is set on a crimping jig (not shown) so as to surround the proximal end portion 15 of the braided wire 14. . With this caulking jig, the caulking ring 16 is reduced in diameter while undergoing a non-circular deformation process, and the outer periphery of the end portion of the pipe 10 is pressed and deformed radially inward. By the process of caulking and deforming the caulking ring 16, the reduced diameter portion 11 is formed in the pipe 10 and the braided wire 14 is fixed to the pipe 10.

  The conductive path main body 17 is configured by bundling a plurality of (three in this embodiment) covered electric wires 18 in a harness shape. Female terminal fittings (not shown) are connected to both ends of each covered electric wire 18. The conductive path body 17 to which the female terminal fitting is connected is inserted through the pipe 10 and the two braided wires 14. Female terminal fittings at both ends of the conductive path main body 17 are attached in the harness side connector 22. Moreover, the front-end | tip part (end part on the opposite side to the base end part 15) of the two braided wires 14 is fixed to the shield shell (illustration omitted) which comprises the harness side connector 22 so that conduction | electrical_connection is possible.

  The exterior body 19 is made of synthetic resin and has a cylindrical shape. The exterior body 19 is comprised from the corrugated tube which makes a bellows shape over the full length. Therefore, the exterior body 19 has flexibility and can be deformed such that its axis is curved. The minimum inner diameter of the exterior body 19 is set to be larger than the outer diameter of the caulking ring 16. The exterior body 19 has a waterproof function and surrounds the entire area of the pipe 10 and the entire area of the two braided wires 14. The step of attaching the terminal fitting to the harness-side connector 22 is performed after the pipe 10 and the braided wire 14 are inserted through the exterior body 19. Rubber grommets 23 that are separate from the exterior body 19 and function as waterproofing means are attached to both ends of the exterior body 19. The grommet 23 is externally fitted to the harness side connector 22.

  Of the shield conductive path A configured as described above, the region where the braided wire 14 surrounds the conductive path main body 17 is arranged so as to include a curved path between the pipe 10 and the battery 20 and between the pipe 10 and the inverter device 21. Searched for. One of the two harness-side connectors 22 is fitted to the device-side connector 24 of the battery 20, and the other harness-side connector 22 is fitted to the device-side connector 24 of the inverter device 21.

  The shield conductive path A of the first embodiment is arranged so that the pipe 10 having a shielding function, the reduced diameter portion 11 formed on the outer periphery of the pipe 10, and the base end portion 15 surround the outer periphery of the reduced diameter portion 11. A braided wire 14 having a shield function, a caulking ring 16 disposed so as to surround the outer periphery of the proximal end portion 15 of the braided wire 14 and fixing the braided wire 14 to the reduced diameter portion 11, and the pipe 10 and the braided And a conductive path main body 17 inserted into the wire 14.

  Since the fixed portion of the pipe 10 to the braided wire 14 is the reduced diameter portion 11 having a reduced outer diameter, the fixed portion of the pipe 10 and the braided wire 14 can be reduced in diameter. Thereby, the outer diameter of the exterior body 19 can also be made small. Moreover, the cross-sectional shape of the outer periphery of the caulking ring 16 is generally circular, and no large protrusion exists on the outer periphery of the caulking ring 16. Therefore, the outer body 19 can be reduced in diameter as compared with the case where a protrusion is present on the outer periphery of the caulking ring 16.

  Further, the formation region in the axial direction of the reduced diameter portion 11 is a range from the end of the non-reduced diameter region 12 to the end surface 13 of the pipe 10. Therefore, the outer diameter of the region (base end portion 15) surrounding the pipe 10 in the braided wire 14 is necessarily smaller than the outer diameter of the non-reduced region 12 other than the reduced diameter portion 11 in the pipe 10.

  Moreover, since the exterior body 19 which surrounds the fixed part (reduced diameter part 11) in the pipe 10 with the braided wire 14 and the whole area | region of the braided wire 14 is provided, the braided wire 14 is protected from interference of a foreign material etc. be able to. Moreover, the exterior body 19 is a corrugated tube which makes a bellows shape over the full length. Since an existing corrugated tube can be used as the exterior body 19, costs can be reduced.

  In addition, a pair of reduced diameter portions 11 are formed at both ends of the pipe 10, and a braided wire 14 is fixed to each of the pair of reduced diameter portions 11. It was set as the single member of the form which surrounds the full length of 10 and the full length of a pair of braided wire 14. FIG. According to this structure, compared with the case where the two braided wires 14 are enclosed by separate exterior bodies, the number of parts can be reduced. The exterior body 19 is a component made of a synthetic resin containing an orange pigment. According to this configuration, it is possible to omit the step of painting the pipe 10 in orange, so that the cost can be reduced.

<Example 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. In the shield conductive path B of the second embodiment, the exterior body 25 is configured differently from the first embodiment. Since the other configuration is the same as that of the first embodiment, the same reference numeral is given to the same configuration, and the description of the structure, operation, and effect is omitted.

  The exterior body 25 of the second embodiment is a single part composed of a constant diameter portion 26 and a pair of bellows portions 27. The constant diameter portion 26 has a constant outer dimension and inner diameter dimension over its entire length. The inner diameter of the constant diameter portion 26 is set to be slightly larger than the outer diameter of the caulking ring 16. The length of the constant diameter portion 26 is slightly shorter than the total length of the pipe 10 in the second embodiment, and is substantially the same as the total length of the non-reduced diameter region 12. The length of the bellows portion 27 is substantially the same as that of the braided wire 14. The minimum inner diameter of the bellows portion 27 is set to be slightly larger than the outer diameter of the caulking ring 16, similarly to the inner diameter of the constant diameter portion 26.

  The constant diameter portion 26 surrounds the non-diameter region 12 of the pipe 10, and the bellows portion 27 surrounds almost the entire region of the braided wire 14 including the base end portion 15 fixed to the reduced diameter portion 11. Yes. In the manufacturing process of the shield conductive path B, the conductive path main body 17 is inserted into the pipe 10 and the braided wire 14 and the braided wire 14 and the pipe 10 are inserted into the exterior body 25 before the pipe 10 is bent. Thereafter, the pipe 10 is bent together with the constant diameter portion 26.

<Example 3>
Next, a third embodiment of the present invention will be described with reference to FIG. In the shield conductive path C of the third embodiment, the pipe 28 is configured differently from the second embodiment. Since the other configuration is the same as that of the second embodiment, the same reference numeral is given to the same configuration, and the description of the structure, operation, and effect is omitted.

  The pipe 28 according to the third embodiment includes a non-diameter region 29, a pair of reduced diameter portions 30, and a pair of large diameter portions 31. The non-diameter region 29 occupies most of the length of the pipe 28. The formation region of the reduced diameter portion 30 in the axial direction of the pipe 28 is a range from the end of the non-reduced region 29 to a position closer to the non-reduced region 29 side than the end face 32 of the pipe 28. The large-diameter portion 31 is connected to the end of the reduced-diameter portion 30 on the side opposite to the non-reduced-diameter region 29 in both axial ends. The formation area of the large diameter portion 31 in the axial direction is a range from the end portion of the reduced diameter portion 30 to the end face 32 of the pipe 28. The outer diameter of the large diameter portion 31 is substantially the same as that of the non-reduced diameter region 29 and is larger than the outer diameter of the reduced diameter portion 30.

  The formation region in the axial direction of the reduced diameter portion 30 does not reach the end face 32 of the pipe 28, and the large diameter portion that is not surrounded by the caulking ring 16 at the end portion (end side of the reduced diameter portion 30) of the pipe 28. 31 exists. The caulking ring 16 surrounds only the reduced diameter portion 30. Therefore, in a state where the proximal end portion 15 of the braided wire 14 is fixed to the reduced diameter portion 30 by the caulking ring 16, a region on the distal end side of the proximal end portion 15 of the braided wire 14 surrounds the large diameter portion 31. The large-diameter portion 31 can be subjected to other processing such as fixing other members.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

(1) In Examples 1 to 3, the cross-sectional shape of the outer periphery of the caulking ring is circular. However, the cross-sectional shape of the caulking ring may be non-circular.
(2) In Examples 1 to 3, the fixing portion of the pipe with the braided wire and the entire region of the braided wire are surrounded by the outer package, but such an outer package may not be provided.

(3) In Examples 1 to 3, the two braided wires are surrounded by one exterior body, but the two braided wires may be surrounded by separate exterior bodies.
(4) In Examples 1 to 3, the braided wire is fixed to both ends of the pipe. However, the present invention can also be applied to a case where the braided wire is fixed to only one end of the pipe. .

  (5) In Examples 1 to 3, the reduced diameter portion was formed in the step of caulking the caulking ring, but after forming the reduced diameter portion in the pipe in advance, the braided wire was fixed to the reduced diameter portion by caulking. May be.

(6) In the first to third embodiments, the pipe is a single member made of metal, but the pipe may be a composite form in which a conductive shield layer is laminated or embedded in a non-metallic pipe body. .
(7) In Examples 1 to 3, the outer diameter of the caulking ring is larger than the outer diameter of the non-reduced area where the reduced diameter portion of the pipe is not formed. The outer diameter of the region of the pipe where the reduced diameter portion is not formed may be the same or smaller than that.

  (8) In the second embodiment, the length of the constant diameter portion of the exterior body is slightly shorter than the total length of the pipe and is substantially the same as the total length of the non-reduced diameter region. The length may be the same as the full length of the pipe, may be longer than the full length of the pipe, may be shorter than the non-reduced area, or may be longer than the non-reduced area.

(9) The exterior body of Example 3 may be a corrugated tube as in Example 1.
(10) In the first to third embodiments, the grommet is provided separately from the exterior body. However, the grommet may not be provided.

  (11) In the first to third embodiments, the exterior body surrounds the entire length of the pipe and the braided wire. However, the pipe may be surrounded by the exterior body and the braided wire may be surrounded by the grommet.

A, B, C ... shield conductive path 10, 28 ... pipe 11, 30 ... reduced diameter part 13, 32 ... pipe end face 14 ... braided wire 15 ... base end part of braided wire 16 ... caulking 17 ... conductive path body 19 , 25 ... exterior body 26 ... constant diameter part 27 ... bellows part 31 ... large diameter part

Claims (8)

A pipe having a shielding function, having a form in which a conductive shield layer is laminated on a non-metallic pipe body,
A reduced diameter portion formed on the outer periphery of the pipe;
A braided wire having a shielding function arranged so that the base end portion surrounds the outer periphery of the reduced diameter portion;
Caulking that is arranged so as to surround the outer periphery of the base end portion of the braided wire and fixes the braided wire to the reduced diameter portion;
And a inserted through the conduction path main body into said pipe and said braided wire,
An inner diameter of the reduced diameter portion is smaller than an inner diameter of a portion of the pipe where the reduced diameter portion is not formed,
Only the conductive path main body is inserted inside the reduced diameter portion . The formation region in the axial direction of the reduced diameter portion, the shield conductive path according to claim 1, characterized in that the range extending to the end face of the pipe. On the end side region of the pipe than the reduced diameter portion of the outer circumference of the pipe, to claim 1, characterized in that large large diameter portion of the outer diameter than said reduced diameter portion is formed The shield conductive path as described. The shield conductive path according to any one of claims 1 to 3 , further comprising an exterior body that surrounds a portion of the pipe that is fixed to the braided wire and the entire region of the braided wire. A pair of reduced diameter portions are formed at both ends of the pipe,
The braided wire is fixed to the pair of reduced diameter portions, respectively.
5. The shield conductive path according to claim 4 , wherein the exterior body is a single member configured to surround the entire length of the pipe and the entire length of the pair of braided wires. 6. The shield conductive path according to claim 5 , wherein the exterior body is a corrugated tube having a bellows shape over its entire length. The outer body, a diameter is constant according to claim 5, characterized in that it comprises a constant diameter part surrounding the pipe, and a pair of the bellows portion which surrounds the two said braided wire Shield conductive path. Shield conductive path according to any one of claims 4-7, wherein the outer body is orange.