JP5002182B2 - Shield conductive path - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shielded conductive path, which is composed of a pipe in which a flexible shielding member is assembled, and in which the flexible shielding member can be assembled stably in the pipe. <P>SOLUTION: The shielded conductive path 1 is provided with a metal pipe 10, a cylindrical flexible shielding member 60, connected at an end part of the pipe 10 and a cable 30 which is inserted and shielded in the pipe 10 and the flexible shielding member 60. Furthermore, there is provided a ring-shaped fixing piece 40, fixed on a circumference of the pipe to pinch the flexible shielding member 60 and the circumferential wall of the pipe, as well. The annular-shaped fixing piece 40 comprises a part which is plastic-molded to hold tight the pipe 10 and retains its shape, and a projected part 52 is formed on the internal wall face. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a shield conductive path.

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, in the configuration in which the caulking ring is simply tightened, there is a problem that the flexible shield member is easily slid along the inner wall surface of the caulking ring. Further, the flexible shield member is slidable along the outer wall surface of the pipe. As a result, there is a problem that the flexible shield member cannot be stably held between the pipe and the caulking ring.

  The present invention has been completed based on the above circumstances, and in a shield conductive path in which a flexible shield member is assembled to a pipe, the flexible shield member can be stably assembled to the pipe. It aims at providing the composition which can be performed.

As means for achieving the above object, the invention according to claim 1 provides a shield conductive path,
A metal pipe,
A cylindrical flexible shield member connected to the end of the pipe;
An electric wire shielded by being inserted through the pipe and the flexible shield member;
An annular fixture having a configuration in which the flexible shield member is sandwiched together with a peripheral wall of the pipe and is annularly fixed around the pipe, and a protrusion is formed on an inner wall surface;
It is characterized by providing.

The invention of claim 2 is the shield conductive path according to claim 1,
The annular fixture is characterized in that a shape thereof is held in a form in which the pipe is tightened by being subjected to plastic working on a part thereof.

The invention of claim 3 is the shield conductive path according to claim 2,
The annular fixture includes an annular member provided with an arcuate portion along the peripheral wall of the pipe, and a bent projecting portion that bends and projects outward from the pipe in a form of bending from both ends of the arcuate portion. Have
The arcuate portion is configured to be reduced in diameter in accordance with plastic working with respect to the bent protruding portion.

The invention of claim 4 is the shield conductive path according to claim 3,
The annular fixture has a holding member that is formed in an arc shape along the peripheral wall of the pipe and arranged in an arc shape in a form that is clamped to the annular member between the pipe and the annular member,
The protrusion is formed on the inner wall surface of the holding member.

The invention of claim 5 is the shield conductive path according to claim 4,
The holding member is arranged in a form covering the inside of the bent protrusion.

The invention according to claim 6 is the shield conductive path according to claim 4 or 5, wherein
The holding member is supported by the annular member at a joint portion where the holding member and the arcuate portion are in contact with each other, and the protruding portion is displaced along the inner wall of the pipe according to plastic processing with respect to the bent protruding portion. Is configured to
The protrusion is characterized by having said during plastic working to flexion protrusion Oite the displacement direction of the protrusion, the inclined portion inclined with respect to the peripheral wall of the pipe.

The invention of claim 7 is the shield conductive path according to any one of claims 1 to 5,
The protrusion is configured to bite into a peripheral wall of the pipe.

<Invention of Claim 1>
According to the invention of claim 1, the flexible shield member can be easily joined to the pipe by the annular fixture. Furthermore, since the protrusion is formed on the inner wall surface of the annular fixture, the flexible shield member held by the annular fixture and the pipe is configured to be less slippery with respect to the annular fixture and the pipe. Will be positioned.

<Invention of Claim 2>
According to invention of Claim 2, it becomes a structure which can fix an annular fixing tool to the circumference | surroundings of a pipe, without accompanying complicated process and without increasing a number of parts so much.

<Invention of Claim 3>
According to invention of Claim 3, the structure which clamps a flexible shield member suitably can be implement | achieved more simply, restraining the number of parts.

<Invention of Claim 4>
According to the invention of claim 4, since the flexible shield member is tightened through the arc-shaped holding member, the pressing force is generated evenly and evenly around the flexible shield member. .

<Invention of Claim 5>
According to invention of Claim 5, since the holding member is distribute | arranged in the form which covers the inner side of a bending protrusion part, it can suppress thru | or prevent that a flexible shield member enters into the bending protrusion part side. Therefore, the flexible shield member can be stably tightened without positional displacement.

<Invention of Claim 6>
According to the invention of claim 6, the holding member is supported by the annular member at the joint portion where the holding member and the arcuate portion are in contact , and the protrusion is formed on the inner wall of the pipe according to the plastic processing for the bent protrusion. Since the structure which displaces along is comprised, the holding member will be suitably clamp | tightened with respect to a pipe by performing plastic working with respect to a bending protrusion part. In addition, the protrusion has an inclined portion that is inclined with respect to the peripheral wall of the pipe on the displacement direction side of the protrusion when the bent protrusion is plastically processed . Therefore, even if the protruding portion is displaced, the flexible shield member is guided by the inclined portion and is not easily caught. Therefore, the flexible shield member is not easily displaced during tightening.

<Invention of Claim 7>
According to the seventh aspect of the present invention, since the projecting portion bites into the peripheral wall of the pipe, the flexible shield member does not slide between the projecting portion and the pipe, and the displacement of the flexible shield member is further increased. It can be effectively prevented.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to the drawings.
FIG. 1 is a side sectional view schematically illustrating a shield conductive path 1 according to the first embodiment. 2 is a cross-sectional view showing an AA cross section of FIG.
(1. Overall configuration)
A shield conductive path 1 according to the present embodiment shown in FIG. 1 is, for example, an apparatus (in this embodiment, an inverter) that constitutes a power circuit for driving a traveling motor provided in an engine room at the front of an electric vehicle. ) And a device (a battery in the present embodiment) constituting a power circuit provided in the rear part (for example, a trunk room) of the vehicle body.

  As shown in FIGS. 1 and 2, the shield conductive path 1 includes a pipe 10 made of metal (for example, a metal such as aluminum alloy, stainless steel, copper, copper alloy, etc.) having a collective shield function, and an end portion of the pipe 10. A cylindrical flexible shield member 60 connected to the three wires 30, three electric wires 30 shielded by being inserted through the pipe 10 and the flexible shield member 60, and the flexible shield member 60 of the pipe 10 And an annular fixture 40 sandwiched with the peripheral wall.

  As shown in FIGS. 1 and 2, the pipe 10 has a function of protecting the electric wires 30 in addition to the collective shielding function. The pipe 10 has a configuration in which the electric wires 30 described later are inserted therein, and has a cross-sectional shape. It is circular. The pipe 10 is routed substantially horizontally along, for example, the floor under the vehicle body (below the floorboard).

  The flexible shield member 60 is formed of a braided wire obtained by knitting metal fine wires in a mesh shape. The flexible shield member 60 is formed in a cylindrical shape and surrounds the periphery of the electric wire 30 extending to the outside of the pipe 10. In the present embodiment, a pair of flexible shield members 60 are fixed to both ends of the pipe 10 by an annular fixture 40 described later, and one flexible shield member connected to one end side of the pipe 10. 60 is bent in the engine room and connected to a shield case (not shown) of the inverter. On the other hand, the other flexible shield member 60 connected to the other end of the pipe 10 is routed in the vehicle through the floor plate and connected to a battery shield case (not shown).

  As shown in FIG. 2, the electric wire 30 is a non-shield type electric wire in which the outer periphery of a flexible core wire 31 is surrounded by an insulating coating 32, and the cross-sectional shape thereof is circular. In the present embodiment, three electric wires 30 having the same configuration as shown in FIG. 1 are composed of a flexible shield member 60 (braided wire) on one side (inverter side), a pipe 10, and the other side (battery side). ) Of the flexible shield member 60 (braided wire). These electric wires 30 are arranged in a straight line in the pipe 10 and extend outward from the pipe ends.

(2. Connection structure of flexible shield member)
Next, a configuration for connecting the flexible shield member 60 to the pipe 10 will be described.
First, the annular fixture 40 that fixes the flexible shield member 60 will be described. As shown in FIG. 2, the annular fixture 40 is shaped and held in such a manner that the pipe 10 is tightened by being subjected to plastic processing on a part thereof, and is configured to be annularly fixed around the pipe 10. I am doing. Specifically, an annular member 41 disposed on the outer side and a holding member 50 attached to the inner side of the annular member 41 and disposed along the outer wall of the pipe 10 are provided.

  The annular member 41 is configured by sheet metal processing, and is bent outward from the pipe in a form that is bent from both ends of the arc-shaped portion 43 along the peripheral wall of the pipe 10 and the arc-shaped portion 43 on the pipe side. And a bent protruding portion 42 that protrudes. The arcuate part 43 is configured to be reduced in diameter in accordance with the plastic working with respect to the bent protruding part 42. The bent protrusion 42 is formed integrally with the arcuate part 43 so as to connect both ends of the arcuate part 43. If the shape of the bent protrusion 42 is determined, the inner diameter of the arcuate part 43 is accordingly determined. Are also determined. More specifically, by performing plastic working so that the distance between the side walls 42A and 42B of the bent protrusion 42 is reduced, both ends of the arcuate part 43 are deformed so that the tightening force by the arcuate part 43 is increased. It is supposed to be. The plastic working will be described later.

  The holding member 50 is configured by sheet metal processing, and is formed in an arc shape along the peripheral wall of the pipe 10. The holding member 50 is arranged in an arc shape in a form to be fastened to the annular member 41 between the pipe 10 and the annular member 41, and is set to a curvature corresponding to the inner diameter of the annular member 41. . Three protrusions 52 are formed on the inner wall surface of the holding member 50, and in a fixed state, the protrusions 52 abut against the outer surface of the pipe 10 or bite into the peripheral wall of the pipe 10. .

  Further, the holding member 50 is arranged in a form covering the inside of the bent protrusion 42. That is, the arc-shaped portion 43 is arranged in such a manner as to straddle the end portions 43 </ b> A and 43 </ b> B on the pipe 10 side, and has a configuration that closes the space inside the bent protruding portion 42.

  Further, the holding member 50 is supported by the annular member 41 at a predetermined position. In this embodiment, a long hole 45 is formed in a part of the annular member 41 (see also FIGS. 7 and 8), and a bent portion 54 formed by bending a part of the holding member 50 is inserted into the long hole 45. In the vicinity of the long hole 45, a joint 57 is formed by spot welding or the like.

Further, as shown in FIG. 3, the protrusion 52 is displaced along the inner wall of the pipe 10 in the direction of the arrow F <b > 1 in accordance with the plastic working on the bent protrusion 42, and the protrusion 52 has a displacement direction thereof. On the side, an inclined portion 52A that is inclined with respect to the peripheral wall of the pipe 10 is formed.

  As described above, in the shield conductive path 1 according to the present embodiment, the flexible shield member 60 can be easily joined to the pipe 10 by the annular fixture 40, and the protrusion is formed on the inner wall surface of the annular fixture 40. Since 52 is formed, the flexible shield member 60 held by the annular fixture 40 and the pipe 10 is configured not to slip with respect to the annular fixture 40 and the pipe 10. Therefore, the flexible shield member 60 is not easily displaced and is stably positioned with respect to the pipe 10.

  Further, since the annular fixture 40 is configured to be held in a shape in which the pipe 10 is tightened by being subjected to plastic working on a part thereof, the number of parts is reduced without complicated processing. The annular fixture 40 can be fixed around the pipe 10 without being increased.

Further, the annular fixture 40 is bent so as to bend and protrude outward from the pipe 10 in such a manner that it is bent from both ends of the arc-shaped portion 43 along the peripheral wall of the pipe 10 on the pipe 10 side. In order to have a configuration in which the annular member 41 having the projecting portion 42 and the arcuate portion 43 is reduced in diameter in accordance with plastic processing on the bent projecting portion 42, the configuration in which the flexible shield member 60 is suitably tightened, This can be realized more easily by reducing the number of parts.

  Further, since the flexible shield member 60 is tightened via the arc-shaped holding member 50, a pressing force is generated evenly and evenly around the flexible shield member 60.

  In addition, since the holding member 50 is arranged so as to cover the inside of the bent protruding portion 42, it is possible to suppress or prevent the flexible shield member 60 from entering the bent protruding portion 42 side. Therefore, the flexible shield member 60 can be stably clamped without displacement.

In addition, the holding member 50 is supported by the annular member 41 at a predetermined position, and the protruding portion 52 is displaced along the inner wall of the pipe 10 in accordance with plastic processing with respect to the bending protruding portion 42. By performing plastic working on the portion 42, the holding member 50 is suitably fastened to the pipe 10. The protrusion 52 has an inclined portion 52A that is inclined with respect to the wall surface of the pipe 10 on the displacement direction side of the protrusion 52 when the bent protrusion 42 is plastically processed . Therefore, even if the protrusion 52 is displaced, the flexible shield member 60 is guided by the inclined portion 52A and is not easily caught. Therefore, the flexible shield member 60 is not easily displaced during tightening.

  Further, if the protrusion 52 bites into the peripheral wall of the pipe 10, the flexible shield member 60 does not slide between the protrusion 52 and the pipe 10, and the displacement of the flexible shield member 60 is more effectively prevented. Can be prevented.

(3. Manufacturing method)
Next, a method for manufacturing the shield conductive path 1 according to this embodiment will be described.
First, in manufacturing the shield conductive path 1, an annular member 41 and a holding member 50 as shown in FIGS. 6, 7, and 8 are prepared by sheet metal processing. The holding member 50 has a shape as shown in FIGS. 9 to 12, and the protrusion 52 is formed by pushing the wall surface of the holding member 50 from the outside to the inside. In the present embodiment, the inclined portion 52 </ b> A formed on the protruding portion 52 is configured by two inclined surfaces, and both of the inclined surfaces are on the displacement direction side of the protruding portion 52 during the plastic working of the bent protruding portion 42. In FIG.

  As described above, a part of the holding member 50 is inserted into the long hole 45 and the vicinity of the long hole 45 is joined by spot welding or the like. Then, the pipe 10 into which the three electric wires 30 are inserted is prepared and set as shown in FIG.

As shown in FIG. 4, the annular member 41 before plastic working has a larger diameter than the annular member 41 after plastic working (see FIG. 2), and the diameter of the holding member 50 is also large. When the respective components are arranged as shown in FIG. 4, plastic processing for the bent protrusion 42 is performed thereafter. As shown in FIG. 5, the plastic working is performed by pressing both side walls of the bent protrusion 42 so as to be sandwiched between pressing members 70 and 70 made of a highly rigid metal material. When the bent protrusion 42 is sandwiched between the pressing members 70 and 70 as shown in FIG. 5, the holding member 50 is also reduced in diameter as the annular member 41 is reduced in diameter, and finally displaced as indicated by the broken line 50 ′ in FIG. As shown in FIG. During this displacement, the holding member 50 slides along the peripheral wall of the pipe 10 in the direction of the arrow F2, but since the inclined portion 52A is formed on the sliding direction side of the protruding portion 52, the flexible shield member 60 is formed. It is hard to get caught in.
Then, by this pressing, both side walls 42A and 42B of the bent protrusion 42 are bent and pressed as shown in FIG. 2, and the both end portions 43A and 43B on the pipe 10 side of the arcuate portion 43 approach each other accordingly. Deform to That is, the arcuate portion 43 is reduced in diameter, and the holding member 50 is also reduced in diameter accordingly. In the present embodiment, since the hole 42C is formed in the bent protrusion 42, the bent protrusion 42 is easily deformed.

  Since the bent projecting portion 42 is held in a shape deformed from the state of FIG. 4 as shown in FIG. 2, the arcuate portion 43 is maintained in a state where the pipe 10 is clamped via the holding member 50, and is flexible. The shield member 60 is stably held between the holding member 50 and the pipe 10.

<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, 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 annular member and the holding member constitute an annular fixture, and the projection is provided on the holding member. However, the holding member is omitted, and the annular fixture is constituted only by the annular member. May be. In this case, it can be realized by forming a protrusion on the inner wall surface of the annular member.
(2) In the above embodiment, the number of protrusions is three, but it may be less (for example, one or two) or more (four or more).

1 is a side sectional view schematically illustrating a shield conductive path according to a first embodiment of the invention. AA sectional view of the shield conductive path of FIG. FIG. 2 is an enlarged view showing a part of FIG. Explanatory drawing explaining the state before plastic working Explanatory drawing which expands and demonstrates a part of FIG. Front view showing an annular fixture before plastic working The figure which looked at the annular fixture of Drawing 6 from the side The figure which looked at the annular fixture of FIG. 6 from the bending protrusion part side Front view of holding member before plastic working Sectional view of the holding member of FIG. BB sectional drawing of the holding member of FIG. CC sectional drawing of the holding member of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Shield conductive path 10 ... Pipe 30 ... Electric wire 40 ... Ring-shaped fixture 41 ... Ring member 42 ... Bending protrusion part 43 ... Arc-shaped part 50 ... Holding member 52 ... Projection part 52A ... Inclination part 60 ... Flexible shield member

Claims (7)

A metal pipe,
A cylindrical flexible shield member connected to the end of the pipe;
An electric wire shielded by being inserted through the pipe and the flexible shield member;
An annular fixture having a configuration in which the flexible shield member is sandwiched together with a peripheral wall of the pipe and is annularly fixed around the pipe, and a protrusion is formed on an inner wall surface;
A shield conductive path characterized by comprising: 2. The shield conductive path according to claim 1, wherein the annular fixture is held in a shape in which the pipe is tightened by being subjected to plastic processing on a part thereof. The annular fixture includes an annular member provided with an arcuate portion along the peripheral wall of the pipe, and a bent projecting portion that bends and projects outward from the pipe in a form of bending from both ends of the arcuate portion. Have
3. The shield conductive path according to claim 2, wherein the arc-shaped portion is configured to have a reduced diameter in accordance with plastic processing with respect to the bent protruding portion. The annular fixture has a holding member that is formed in an arc shape along the peripheral wall of the pipe and arranged in an arc shape in a form that is clamped to the annular member between the pipe and the annular member,
The shield conductive path according to claim 3, wherein the protrusion is formed on an inner wall surface of the holding member. The shield conductive path according to claim 4, wherein the holding member is arranged in a form covering the inside of the bent protrusion. The holding member is supported by the annular member at a joint portion where the holding member and the arcuate portion are in contact with each other, and the protruding portion is displaced along the inner wall of the pipe according to plastic processing with respect to the bent protruding portion. Is configured to
The protrusion, said during plastic working to flexion protrusion Oite the displacement direction of the protrusion, claim 4 or claim, characterized by having an inclined portion inclined with respect to the peripheral wall of the pipe Item 6. The shield conductive path according to Item 5 . The shield conductive path according to any one of claims 1 to 6, wherein the protruding portion is configured to bite into a peripheral wall of the pipe.

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