JP2006310065A - Shield conduction line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shield conduction line with a branched metal pipe. <P>SOLUTION: An electric line outlet 11 is formed in a main shaft pipe 10, and three electric wires Wd are passed through the main shaft pipe 10 over the overall length of the main shaft pipe 10 while their ends are pulled out by a predetermined length from the electric wire outlet 11. In a branch pipe 20, respective branch pipe holding parts 31 of two mounting members 30 are welded, and respective main shaft pipe holding parts 32 of the mounting members 30 are swaged around the outer circumference of the main shaft pipe 10. Around the main shaft pipe 10, a metallic tape 40 such as an aluminum tape with an adhesive is wound with the mounting members 30. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shield conductive path in which an electric wire is shielded by a metal pipe.

In Patent Document 1, a metal pipe having an electric wire protection function and a flexible shield member are connected, and a plurality of non-shielded electric wires are inserted into the pipe and the flexible shield member at once. A shield conductive path for shielding is disclosed. Such a shield conductive path can be used as a power circuit of an electric vehicle or a hybrid vehicle. In this case, a pipe is used as a shield means in the routing route along the floor of the vehicle body, and the space is bent with no room. A flexible shield member is used as a shield means in a portion routed along the path.
JP 2004-171952 A

  By the way, in an electric vehicle or the like, as a power circuit, there is not only a power circuit for a traveling motor but also a power circuit for an air conditioner for a passenger compartment, for example. Since each of these power circuits is partially different in routing route, it is originally necessary to shield using separate metal pipes. However, the use of many metal pipes for each power circuit increases the weight and increases the man-hours for installing the pipes.

  Therefore, a configuration is considered in which a metal pipe is shared at least in the part where the routing route is common, an opening is provided in the middle part of the metal pipe, and another branch pipe is welded here to use a branched metal pipe. It is done.

  However, when a branched metal pipe is manufactured by welding as described above, if an electric wire is inserted into the metal pipe prior to welding, the electric wire inserted inside may be damaged by the welding operation. However, even if it is attempted to pass the electric wire through the branched metal pipe after the branch pipe is welded, there is a problem that the electric wire cannot be passed through the deep branch portion.

  The present invention has been completed based on the above-described circumstances, and an object thereof is to provide a shielded conductive path with a branch that can be shielded by a metal pipe with respect to a conductive path whose wiring path is partially common. To do.

  As means for achieving the above-mentioned object, the invention of claim 1 is characterized in that a plurality of wires are formed in a middle part of a metal main pipe into which a plurality of electric wires are inserted and a peripheral wall of the main pipe. A wire lead-out port through which a part of the wires in the wire group can be pulled out of the main pipe, a branch pipe through which the wire drawn through the wire lead-out port is inserted, and an electrical connection to the branch pipe A branch pipe holding portion fixed in a state, and a main pipe holding portion fixed in an electrically connected state to the peripheral wall of the basic pipe integrally connected thereto, thereby branching the branch pipe from the basic pipe It has the characteristic in the structure provided with the metal attachment members hold | maintained to.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the attachment members are provided in pairs so as to be located on both sides along the axial direction of the main pipe with the branch pipe interposed therebetween. Have

  According to a third aspect of the present invention, in the first or second aspect of the present invention, an end portion of the branch pipe on the main pipe side is formed with a rim portion obtained by rounding an opening edge portion, and the rim portion is the electric wire. It is characterized in that it is located inside the pipe from the opening edge of the drawer opening.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a conductive tape is wound around the main pipe so as to cover the excess opening around the wire outlet. It has a characteristic where it exists.

  The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, the attachment member is integrally provided with a closing portion that covers an excess opening of the wire outlet. Have.

<Invention of Claim 1>
The main pipe and the branch pipe are held in a branched state by an attachment member integrally having the main pipe holding part and the branch pipe holding part. Each holding part can be fixed to the main pipe and branch pipe by welding, caulking, etc., and it can be fixed easily compared to the case where both pipes are directly welded to each other. Damage to a certain electric wire can be suppressed. For this reason, it is only necessary to insert necessary wires into the main pipe and the branch pipe in advance, and to assemble both pipes in a branched shape by combining them and using an attachment member.

<Invention of Claim 2>
The branch pipe is supported by the main pipe on both sides of the outer peripheral portion, and the branch state of the metal pipe can be stably maintained.

<Invention of Claim 3>
Since the end portion of the branch pipe is rounded, even if the electric wire inserted through both the branch pipe and the main pipe contacts the opening edge portion of the branch pipe, it is difficult to damage the wire jacket.

<Invention of Claim 4>
In order to connect the branch pipe, an electric wire outlet must be formed on the peripheral wall of the main pipe, and since the peripheral wall has a cylindrical surface shape, an excessive opening tends to occur at the connection portion with the branch pipe. There is a circumstance. Therefore, if the surplus opening is covered with a metal tape as in the present invention, noise leakage from the wire outlet is suppressed, and the shielding performance is improved.

<Invention of Claim 5>
Since the closing part that covers the excess opening of the wire outlet is integrally provided on the mounting member, simply connecting the main pipe and the branch pipe using the mounting member covers the excess opening and improves the shielding performance. be able to.

<Embodiment>
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to FIGS. In the present embodiment, for example, in a hybrid vehicle using both an internal combustion engine and an electric motor as drive sources, two systems of three-phase AC outputs are output from an inverter device provided in the engine room of the rear wheel drive motor and the indoor air conditioner. An example will be described in which the present invention is applied to a shield conductive path for supplying to a drive motor of a shoner.

  The whole image of the branched shield conductive path is shown in FIG. This includes a main pipe 10 made of a metal pipe such as aluminum, for example, and a branch pipe 20 having a smaller diameter. Although the relationship with the automobile is not shown in detail, the branch pipe 20 is attached by the mounting member 30 so as to branch at an angle of about 90 degrees from the position near the end of the main pipe 10 located in the engine room of the automobile. The remaining portion of the main pipe 10 extends downward from, for example, the engine room, is fixed along the bottom of the vehicle body floor, and reaches a travel motor for the rear wheels. Then, three unshielded electric wires Wd are inserted into the main pipe 10 to connect the inverter device and the traveling motor. Also, from the main pipe 10 to the branch pipe 20, three unshielded electric wires Wa (thin diameter is smaller because the transmission power is smaller than the electric wires Wd) are inserted, and the inverter device and the air conditioner are connected. Connect the drive motor. Accordingly, in the main pipe 10, a total of six electric wire groups consisting of the electric wires Wd and Wa are located in the front (inverter side) from the portion where the branch pipe 20 branches, and behind the branch portion (rear) Three electric wires Wd are located in the main pipe 10 on the side of the traveling motor for the wheel, and three electric wires Wa are located in the branch pipe 20.

  Now, the pipe branch structure will be described in detail below. An electric wire outlet 11 is formed in the peripheral wall portion of the main pipe 10 with a diameter larger than the outer diameter of the branch pipe 20. On the other hand, the branch pipe 20 is formed with a rim portion 21 that is rounded so that its end portion is turned outward, and the rim portion 21 is inside the pipe from the opening edge portion of the wire outlet 11 of the main pipe 10. It is in the form of entering and deeply entering (see FIG. 3).

  A pair of attachment members 30 are provided at the ends of the branch pipe 20 so as to be sandwiched from positions on both sides along the axial direction of the main pipe 10. This mounting member 30 is also manufactured by bending a metal plate such as aluminum, and has a T-shape before bending, and a portion corresponding to the lower half of the T-shaped vertical bar is a branch pipe. A branch pipe holding portion 31 is formed by being bent in an arc shape along the outer peripheral surface of the pipe 20, and a portion corresponding to a T-shaped horizontal bar is bent in an arc shape of half or more along the outer peripheral surface of the main pipe 10. Thus, a main pipe holding portion 32 is formed. The branch pipe holding part 31 is fixed to the branch pipe 20 by, for example, welding, and the main pipe holding part 32 is fixed to the main pipe 10 by, for example, caulking, and both are in an electrically connected state.

  The manufacturing process of this branched shielded conductive path is as follows. An electric wire outlet 11 is formed in the main pipe 10 in a necessary position in advance, and the electric wire Wd is inserted through the entire length of the main pipe 10 and the electric wire Wa is inserted through the electric wire outlet 11 by a predetermined length ( Further, the whole is bent into a necessary shape.

  On the other hand, the branch pipe holding portions 31 of the two attachment members 30 are welded to the branch pipe 20 at symmetrical positions of about 180 degrees (see FIG. 6). In this welding, since the electric wire Wa is not inserted into the branch pipe 20, there is no possibility that the electric wire Wa is damaged. At this stage, the main pipe holding portion 32 of each attachment member 30 is U-shaped as shown in the figure.

  Then, the three electric wires Wa drawn from the electric wire outlet 11 are inserted into the branch pipe 20, and each main pipe holding portion 32 of the attachment member 30 is directed to the outer periphery of the main pipe 10 to each main pipe holding portion 32. Crimp from the outside. As a result, the main pipe holding portion 32 is bent from a U-shape into an annular shape having a half or more circumference and is fixed to the main pipe 10. During this operation, the electric wires Wd and Wa are inserted into the main pipe 10, but since the caulking operation does not cause a high temperature, there is no fear of electric wire damage. Thereafter, if necessary, a metal tape 40 as a conductive tape with an adhesive such as an aluminum tape is wound around the main pipe 10 together with the mounting member 30, and an electric wire outlet located around the branch pipe 20. If the 11 extra openings are covered, the operation is completed (see the two-dot chain line in FIG. 2).

  Thus, according to this embodiment, since the main pipe 10 and the branch pipe 20 are held in a branched state by the mounting member 30, the two pipes 10 and 20 can be kept in a branched state with high strength. . In particular, in the present embodiment, since the pair of attachment members 30 are arranged on both sides along the axial direction of the main pipe 10, the branch pipe 20 is supported by the main pipe 10 on both sides, and the metal pipe Can be stably maintained.

  Further, the branch pipe holding portion 31 of the mounting member 30 is welded to the branch pipe 20 in a state where the electric wire Wa is not inserted, and the main pipe holding portion 32 is caulked to the main pipe 10 through which the electric wires Wd and Wa are inserted. Therefore, there is no fear that any of the electric wires Wd, Wa will be damaged by heat. Furthermore, since the rim portion 21 is formed at the end of the branch pipe 20, damage is less likely to occur even when the electric wire Wa contacts the opening edge of the branch pipe 20. It is effective in use. In addition, in the present embodiment, since the excess opening of the wire outlet 11 is covered with the metal tape 40, the peripheral wall of the branch pipe 10 has a cylindrical surface shape. Even if there is a situation that excessive openings are likely to occur, noise leakage from the wire outlet 11 can be suppressed and the shielding performance can be improved.

<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-described embodiment, the attachment member 30 has a T-shape as a whole, but the shape is not limited to this, and the branch pipe holding portion fixed to the branch pipe 20 is necessary. What is necessary is just to form with the metal material so that it may have 31 and the main pipe holding part 32 fixed to the main pipe 10 integrally.

  (2) Moreover, what is necessary is just to block the excess opening of the electric wire drawer | drawing-out port 11 as needed, such as the required shield performance, and the excess opening may remain open depending on a specification. Further, even when the surplus opening is covered, the metal tape 40 is not necessarily wound, but the closing portion 33 of the surplus opening can be formed integrally with the attachment member 30 as shown in FIG.

  (3) In the above embodiment, the attachment member 30 is fixed to the main pipe 10 by caulking. However, the present invention is not limited to this, and may be fixed by welding. Since the work of welding the main pipe holding part 32 to the main pipe 10 can use, for example, so-called pit welding, welding using a torch is required when the branch pipe is directly welded to the main pipe. Compared with, welding work can be completed in a short time, so that damage to the internal electric wires can be prevented.

  (4) Further, for example, a resin cover may be attached to the branch portion to which the attachment member 30 is fixed to reinforce or waterproof.

  (5) The number of branches may not be two as in this embodiment, but may be three or more, and the number of electric wires inserted into each pipe is not limited to three.

  (6) Although the case where a part of the shield conductive path is routed outside the vehicle body has been described in the above embodiment, the present invention can also be applied to a shield conductive path where a pipe is routed inside the vehicle body.

The side view which shows the shield conductive path with a branch of embodiment The perspective view which shows the branch part of a shield conductive path Sectional view showing the branching part of the shield conductive path Sectional view taken along line IV-IV in FIG. Perspective view showing branch pipe and mounting member The perspective view which shows the fixing process of an attachment member The perspective view which shows different embodiment of this invention

Explanation of symbols

Wd, Wa ... Electric wire 10 ... Main pipe 20 ... Branch pipe 21 ... Rim part 30 ... Mounting member 31 ... Branch pipe holding part 32 ... Main pipe holding part 33 ... Closure part 40 ... Metal tape

Claims (5)

A metal main pipe into which a plurality of electric wires are inserted, and
An electric wire outlet that is formed in the middle part of the peripheral wall of the main pipe and is capable of pulling out a part of the electric wires out of the main pipe;
A branch pipe through which the electric wire drawn out through the electric wire outlet is inserted;
A branch pipe holding part fixed in an electrically connected state to the branch pipe and a subjective pipe holding part fixed in an electrically connected state to the peripheral wall of the basic pipe connected to the branch pipe holding part. A shielded conductive path with a branch, comprising a metal mounting member that is held in a branched state from the main pipe. 2. The branched shielded conductive path according to claim 1, wherein the attachment members are provided in pairs so as to be positioned on both sides along the axial direction of the main pipe with the branch pipe interposed therebetween. A rim portion obtained by rounding an opening edge is formed at an end of the branch pipe on the main pipe side, and the rim portion is located on the inner side of the pipe with respect to the opening edge of the wire outlet. 3. The shielded conductive path with branches according to claim 1, wherein the shielded conductive path is branched. 4. The branched shield conductor according to claim 1, wherein a conductive tape is wound around the main pipe so as to cover a surplus opening around the wire outlet. 5. Road. 5. The branched shielded conductive path according to claim 1, wherein the attachment member is integrally provided with a closing portion that covers a surplus opening of the wire outlet. 6.

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