JP2007012515A - Shield conductor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shield conductor aiming at reduction of the number of parts. <P>SOLUTION: A firm fixing part 11 of a shape bent and folded toward an outer periphery is formed at an end part of a shield pipe 10, and a flexible shield member 20 and shield pipe are kept in connected state by pinching an end part of the flexible shield member 20 between outer periphery of the shield pipe 10 and a firm fixing part 11 in a state of being folded so as to reverse inward. Since the firm fixing part 11 formed at the end of the shield pipe 10 is used as a means to connect the flexible shield member 20 with the shield pipe 10, the other separate parts are not necessary. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shield conductor.

In Patent Document 1, a shield pipe made of metal having a wire protection function and a flexible shield member made of a braided wire obtained by braiding metal strands are connected, and a plurality of non-shielded wires are shielded. There is disclosed a shield conductive path that collectively shields by being inserted through a pipe and a flexible shield member. Such a shield conductive path can be used as a power circuit of an electric vehicle. In this case, a high-strength shield pipe is used as a shield means in the routing route along the under floor of the vehicle body, and there is no space to bend. A flexible shield member is used as the shield means in the vehicle routed along the route.
JP 2004-171952 A

As a means for connecting the shield pipe and the flexible shield member, cover the end of the flexible shield member over the end of the shield pipe, fit the caulking ring from above, and reduce the diameter of the caulking ring. A method of sandwiching between the outer periphery of the shield pipe and the inner surface of the caulking ring by plastic deformation is conceivable.
However, this connection method requires dedicated caulking, which increases the number of parts.
The present invention has been completed based on the above-described circumstances, and an object thereof is to reduce the number of parts.

  As means for achieving the above-mentioned object, the invention of claim 1 includes a metal shield pipe, a cylindrical flexible shield member connected to an end of the shield pipe, the shield pipe, and the shield pipe. An electric wire that is shielded by being inserted through the flexible shield member, and an end portion of the shield pipe is formed with a fixed portion that is bent back to the outer peripheral side. The flexible shield member and the shield pipe are in a connected state by being sandwiched between the outer periphery of the shield pipe and the fixing portion in a state in which the end portion of the shield member is folded back so as to be reversed inward. It is characterized by being held in

  The invention of claim 2 is characterized in that, in the invention of claim 1, the fixing portion has a substantially arcuate folded surface smoothly connected to the inner peripheral surface of the shield pipe.

<Invention of Claim 1>
As a means for connecting the flexible shield member to the shield pipe, since a fixing portion formed at the end of the shield pipe is used, a separate part is unnecessary.

<Invention of Claim 2>
When inserting the wire into the shield pipe, even if the tip of the wire comes into contact with the open end of the shield pipe, the open end has a substantially arcuate folded surface that is smoothly connected to the inner peripheral surface of the shield pipe. Therefore, there is no possibility that the electric wire is damaged by contact with the shield pipe.

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. The shield conductor A of the present embodiment includes a shield pipe 10 having a collective shield function and a wire protection function, a flexible shield member 20 having a collective shield function, and a plurality (three in the present embodiment) of non-shields. And a type of electric wire 30.
The shield pipe 10 is made of an aluminum alloy, and its cross-sectional shape is a perfect circle. The flexible shield member 20 is formed of a tubular braided wire made of a copper alloy wire (not shown) knitted in a mesh shape, and can be freely bent and deformed. The rear end portion (the right end portion in FIG. 1) of the flexible shield member 20 is connected to the front end portion of the shield pipe 10 so as to be conductive by a fixing portion 11 described later.
The electric wire 30 has a known form in which the outer periphery of a conductor (not shown) made of an aluminum alloy single core wire, a copper stranded wire, or the like is surrounded by a synthetic resin insulating coating. Is also flexible, the electric wire 30 can be bent and deformed. The plurality of electric wires 30 are inserted into the shield pipe 10 and the flexible shield member 20, and are shielded collectively by the shield pipe 10 and the flexible shield member 20.

  Next, a connection structure between the shield pipe 10 and the flexible shield member 20 will be described. As the connecting means, the cylindrical fixing portion 11 is integrated with the shield pipe 10 by bending the front end portion of the shield pipe 10 into a bent shape so as to be continuously folded over the entire circumference. Is formed. The front end portion of the fixing portion 11 is a bent portion 12 having a substantially semicircular arc shape, and a region behind the bent portion 12 in the fixing portion 11 has a substantially constant diameter and a cylindrical shape concentric with the shield pipe 10. The presser part 13 is formed. Further, the outer surface of the bent portion 12 is a folded surface 14 having a substantially semicircular arc shape that is smoothly (tangentially) continuous with the inner peripheral surface of the shield pipe 10. In the state where the flexible shield member 20 is connected, the outer diameter of the bent portion 12 is larger than the outer diameter of the presser portion 13.

  Next, a procedure for connecting the shield pipe 10 and the flexible shield member 20 will be described. At the time of connection, first, as shown in FIG. 2, the flexible shield member 20 is put on the shield pipe 10. At this time, the flexible shield member 20 faces the rear end in the connected state facing forward. deep. Next, the fixing portion 11 is formed on the shield pipe 10. At this time, as shown in FIG. 3, the outer diameter of the bent portion 12 and the outer diameter of the holding portion 13 are made substantially the same size, and the inner circumference of the holding portion 13 is set. And a gap between the outer periphery of the shield pipe 10 and the outer periphery of the shield pipe 10 so as to allow the flexible shield member 20 to be inserted. Next, as shown in FIG. 4, the end portion located on the front side of the flexible shield member 20 is inserted into the gap between the outer periphery of the shield pipe 10 and the inner periphery of the presser portion 13 from the rear, and the presser portion from this state is inserted. It crimps so that 13 may be diameter-reduced. Then, as shown in FIGS. 5 and 6, the end portion of the flexible shield member 20 is firmly sandwiched between the presser portion 13 and the shield pipe 10, and is fixed in a state in which separation is restricted. After that, if the flexible shield member 20 is turned over so as to be folded back to the outer peripheral side, the flexible shield member 20 turns the rear end portion inward as shown in FIG. In this folded state, it is sandwiched between the outer periphery of the shield pipe 10 and the fixing portion 11 and is held in a state of being connected to the shield pipe 10 so as to be conductive.

As described above, in the present embodiment, as the means for connecting the flexible shield member 20 to the shield pipe 10, the fixing portion 11 formed at the end of the shield pipe 10 is used. No body connection parts are required.
Moreover, the adhering portion 11 has a substantially arcuate folded surface 14 that is smoothly connected to the inner peripheral surface of the shield pipe 10. Thereby, when the electric wire 30 is inserted into the shield pipe 10, even if the tip of the electric wire 30 comes into contact with the open end of the shield pipe 10, the contact portion (open end) has an inner periphery of the shield pipe 10. Since the substantially arcuate folded surface 14 that is smoothly connected to the surface exists, there is no possibility that the electric wire 30 is damaged by contact with the shield pipe 10.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIG. The shield conductor B according to the second embodiment has a configuration in which the fixing portion 15 is different from that of the first embodiment. Since other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals, and descriptions of structures, operations, and effects are omitted.
The fixing portion 15 of the present embodiment has a shape that is curled into a substantially C shape, and the tip edge of the fixing portion 15 faces the outer peripheral surface of the shield pipe 10. Then, the end portion of the flexible shield member 20 is sandwiched between the tip edge of the fixing portion 15 and the outer periphery of the shield pipe 10 so as to be conductive and fixed in a detachment restricted state. Further, a folding surface 16 that is smoothly connected to the inner peripheral surface of the shield pipe 10 is formed in the fixing portion 15.

<Other embodiments>
The present invention is not limited to the embodiment 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, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) In the above embodiment, the shape of the shield pipe is circular. However, according to the present invention, the cross-sectional shape of the shield pipe may be non-circular (elliptical, oval, etc.). In this case, the holding member also has a cylindrical shape similar to the shield pipe.
(2) In the said embodiment, although the adhering part was formed continuously over the perimeter, according to this invention, you may form an adhering part in the multiple places spaced apart in the circumferential direction.
(3) In the above-described embodiment, the substantially arc-shaped folded surface smoothly connected to the inner peripheral surface of the shield pipe is formed on the fixed portion. However, according to the present invention, the outer surface of the fixed portion is bent and the inner periphery of the shield pipe. The boundary with the surface may be an edge-shaped corner.
(4) In the above embodiment, the flexible shield member is a braided wire. However, according to the present invention, the flexible shield member may be a member other than the braided wire, such as a metal sheet material. Good.
(5) In the above embodiment, the shield pipe is made of an aluminum alloy. However, according to the present invention, the shield pipe may be made of another metal material such as a stainless alloy or a copper alloy.
(6) In the above embodiment, the material of the flexible shield member is made of copper alloy, but according to the present invention, other material such as aluminum alloy may be used.
(7) In the above embodiment, three wires are inserted into one shield pipe. However, according to the present invention, the number of wires inserted into one shield pipe may be two or less or four or more. Good.

Plan view of Embodiment 1 Plan view showing a state where the shield pipe is covered with a flexible shield member Partial enlarged sectional view showing a state in which a fixing part is formed on a shield pipe Partial enlarged sectional view showing a state in which the end portion of the flexible shield member is inserted into the gap of the fixing portion Partial enlarged sectional view showing a state in which the flexible shield member is fixed to the fixing portion. A plan view showing a state where the flexible shield member is fixed to the fixing portion. Partial enlarged sectional view showing the connection form between the fixing portion and the flexible shield member The partial expanded sectional view showing the connection form of the adhering part and flexible shield member in Embodiment 2

Explanation of symbols

A ... Shield conductor 10 ... Shield pipe 20 ... Flexible shield member 30 ... Wire 11 ... Fixed part 14 ... Folded surface B ... Shield conductor 15 ... Fixed part 16 ... Folded surface

Claims (2)

Metal shield pipe,
A cylindrical flexible shield member connected to an end of the shield pipe;
An electric wire shielded by being inserted through the shield pipe and the flexible shield member;
At the end of the shield pipe, a fixed portion is formed that is bent back to the outer peripheral side,
The flexible shield member and the shield are sandwiched between the outer periphery of the shield pipe and the fixed portion in a state where the end portion of the flexible shield member is folded back so as to be reversed inward. A shield conductor, wherein the pipe is held in a connected state. The shield conductor according to claim 1, wherein the fixing portion has a substantially arc-shaped folded surface smoothly connected to an inner peripheral surface of the shield pipe.

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