JP2008177120A - Connection method and connection structure between shield pipe and braided wire - Google Patents

Abstract

Cost is reduced when a braided wire is conductively connected to a shield pipe laid on a floor of a hybrid electric vehicle (HEV).
First, a cylindrical braided wire 2 is put on and attached to the outer periphery of a shield pipe 1 (selection diagram (a)). After that, the end 1a of the shield pipe 1 is folded back 180 degrees in two steps in a trumpet shape together with the end 2a of the braided wire 2 (selection (b)). Next, the remaining part 2b of the braided wire 2 is folded back 180 degrees in a trumpet shape (in the direction of arrow B) (selection (c)). Finally, the wire bundle 3 is inserted into the shield pipe 1 and the braided wire 2 (selection diagram (d)). By the folding operation of the shield pipe 1 and the braided wire 2, the braided wire 2 is conductively connected to the shield pipe 1, and at the same time, the edge processing of the shield pipe 1 is performed. Therefore, it is not necessary to use a caulking ring and an edge processing ring, and the cost is suppressed.
[Selection] Figure 1

Description

  The present invention relates to a connection method and a connection structure between a shield pipe and a braided wire, which are suitable for application to a shield pipe laid on a floor of a hybrid electric vehicle (HEV).

  3A and 3B are diagrams illustrating a conventional method of connecting a shield pipe and a braided wire, in which FIG. 3A is a cross-sectional view including the axis of the shield pipe, and FIG. FIG.

Conventionally, when the cylindrical braided wire 2 is conductively connected to the metal shield pipe 1, the end 2a of the cylindrical braided wire 2 is addressed to the end 1a of the shield pipe 1 as shown in FIG. On the other hand, the braided wire 2 is swaged with a caulking ring 7 and fixed to the shield pipe 1 (see, for example, Patent Document 1). In addition, since the end 1a of the shield pipe 1 is normally cut, the wire bundle 3 comes into contact with the end 1a of the shield pipe 1 and is damaged when the wire bundle 3 is inserted into the shield pipe 1. In order to prevent such a situation, the edge processing of the shield pipe 1 is performed by fitting the edge processing ring 9 to the end portion of the shield pipe 1 as shown in FIG.
JP 2004-171952 A (paragraph [0021] column, FIG. 2)

  However, such conventional techniques (hereinafter referred to as known technique 1) have the following problems.

  First, the caulking ring 7 is indispensable when the braided wire 2 is conductively connected to the shield pipe 1, and the cost increases accordingly.

  Secondly, as the braided wire 2 is fixed to the shield pipe 1, edge processing by another component (edge processing ring 9) is required, and the cost increases accordingly.

  Thirdly, it is forced to perform troublesome operations such as positioning at the time of fixing the braided wire 2, remaining processing after fixing, and the like.

  In view of such circumstances, it is an object of the present invention to provide a connection method and a connection structure between a shield pipe and a braided wire that can solve such problems.

First, in the invention of the method for connecting the shield pipe and the braided wire according to claim 1, a cylindrical braided wire is provided around the shield pipe, and the end of the shield pipe is formed into a trumpet shape together with the end of the braided wire. The end of the braided wire is folded and fixed to the end of the shield pipe, and the remaining portion of the braided wire is turned over.
In the invention of the method for connecting the shield pipe and the braided wire according to claim 2, the shield pipe is folded back in a plurality of stages.
In the invention of the connection structure between the shield pipe and the braided wire according to claim 3, the shield pipe and the braided wire are connected to each other in such a manner that a cylindrical braided wire is conductively connected to the shield pipe. The end of the braided wire and the end of the braided wire are folded back in a trumpet shape and fixed to each other.

  According to the present invention, the braided wire is conductively connected to the shield pipe by the folding operation of the shield pipe and the braided wire. As a result, it is not necessary to use caulking, and costs can be suppressed by reducing caulking.

  Further, the shield pipe edge processing is performed simultaneously with the folding operation of the shield pipe and the braided wire. As a result, it is not necessary to use an edge processing ring, and the cost can be suppressed by reducing the edge processing ring.

  Further, since the end of the braided wire is wound around the end of the shield pipe by the folding operation of the shield pipe and the braided wire, positioning when fixing the braided wire, extra processing after fixing, and other troublesome operations become unnecessary. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
FIG. 1 is a cross-sectional view showing a first embodiment of a method for connecting a shielded pipe and a braided wire according to the present invention, wherein (a) is a braided wire mounting process diagram, (b) is a shielded pipe folding process diagram, (C) is a braided wire turning process diagram, and (d) is a wire insertion process diagram.

  As shown in FIG. 1 (d), the conductive path 10 has a metal shield pipe 1 formed in a cylindrical shape, and in the front of the shield pipe 1 (on the right side in FIG. 1 (d)) is a cylindrical shape. The braided wire 2 is electrically connected. Here, the end portion 1a of the shield pipe 1 and the end portion 2a of the braided wire 2 are folded back by 180 degrees in two steps outwardly toward the rear (left side in FIG. 1 (d)) and fixed to each other. ing. Further, inside the shield pipe 1 and the braided wire 2, a wire bundle 3 in which a large number of wires 5 are bundled is disposed. The shield pipe 1 is made of a material that is thin within a range capable of maintaining a predetermined strength and has a high workability (for example, soft iron having a thickness of 0.2 to 0.3 mm subjected to rust prevention treatment such as galvanization) A thickness of 0.6 that facilitates folding by forming a plurality of (for example, eight) slits in the axial direction at predetermined angular intervals (for example, 45 ° intervals) along the circumferential direction in the folded portion. ~ 0.8mm aluminum).

  Since the conductive path 10 has the above-described configuration, the following procedure is used when forming the conductive path 10.

  First, in the braided wire mounting step, as shown in FIG. 1 (a), the outer periphery of the shield pipe 1 is covered with a tubular braided wire 2 so as to be provided. At this time, the gap between the shield pipe 1 and the braided wire 2 is preferably 2 to 5 mm. This is because if the gap is smaller than 2 mm, it is difficult to cover the shield pipe 1 with the braided wire 2. Conversely, if the gap is larger than 5 mm, the winding operation of the end 2a of the braided wire 2 described later is hindered. Because there is a fear of coming.

  Thereafter, the process proceeds to a shield pipe folding step, and using a predetermined jig (not shown), the end 1a of the shield pipe 1 is rearward together with the end 2a of the braided wire 2 as shown in FIG. Turn back 180 degrees in two steps in a trumpet shape outward (in the direction of arrow A). Then, the end 2a of the braided wire 2 is fixed in a state where it is wound around the end 1a of the shield pipe 1 and conducted.

  At this time, since the end portion 1a of the shield pipe 1 is folded back in two steps, the end portion 2a of the braided wire 2 can be reliably fixed as compared with the case where the end portion 1a is folded back in one step. In addition, unlike the known technique 1 (see FIG. 3), since it is not necessary to use the caulking ring 7, the cost can be suppressed by the amount that the caulking ring 7 is reduced. Further, since the end portion 2a of the braided wire 2 is wound around the end portion 1a of the shield pipe 1 by the folding operation of the end portion 1a of the shield pipe 1, the positioning when the braided wire 2 is fixed, the remaining processing after fixing, etc. Can be saved.

  Next, the process proceeds to a braided wire turning over process, and as shown in FIG. 1 (c), the remaining part 2b of the braided wire 2 is turned 180 ° outward toward the front (in the direction of arrow B). Then, the braided wire 2 moves over to the front of the shield pipe 1 (on the right side in FIG. 1C) and is connected to the shield pipe 1 in a conductive state.

  Finally, the process proceeds to the electric wire insertion step, and the electric wire bundle 3 is inserted into the shield pipe 1 and the braided wire 2 as shown in FIG.

  At this time, since the edge processing of the shield pipe 1 is simultaneously performed by the folding operation of the end portion 1a of the shield pipe 1, the wire bundle 3 contacts the edge of the end portion 1a of the shield pipe 1 and is damaged. Can be avoided. In addition, unlike the known technique 1 (see FIG. 3), it is not necessary to use the edge processing ring 9, so that the cost can be suppressed by the amount of reduction of the edge processing ring 9.

  Here, the formation work of the conductive path 10 is completed.

<Second Embodiment>
FIG. 2 is a cross-sectional view showing an end crimping step in the second embodiment of the method for connecting the shield pipe and the braided wire according to the present invention.

  In 1st Embodiment mentioned above, the case where it transfers to a braided wire reverse process after a shield pipe return process was demonstrated. However, the process proceeds to the end crimping process after the shield pipe folding process, and the cylindrical crimping auxiliary member 12 is brought into contact with the inner peripheral surface of the shield pipe 1 as shown in FIG. You may make it crush the edge part 1a of the shield pipe 1 in the radial direction (arrow F direction) of the shield pipe 1 using a tool (not shown). If it does in this way, the edge part 1a of the shield pipe 1 and the edge part 2a of the braided wire 2 will be press-contacted mutually, and both fixing force will increase. At this time, since the crimping auxiliary member 12 is fitted inside the shield pipe 1, it is possible to prevent the diameter of the shield pipe 1 from being reduced due to the crimping.

<Other embodiments>
In 1st Embodiment mentioned above, when forming the electrically conductive path 10, although the case where the order of a braided wire installation process, a shield pipe folding back process, a braided wire reverse process, and an electric wire insertion process was followed was demonstrated, an electric wire insertion process remains You may move immediately before any of the three steps. For example, the wire insertion process can be moved between the shield pipe folding process and the braided wire turning process. In this case, as shown in FIG. 1 (b), the wire bundle 3 can be inserted while the braided wire 2 is attached to the outer periphery of the shield pipe 1. It can be easily inserted into the inside.

  In the first embodiment described above, the case where the end portion 1a of the shield pipe 1 is folded in two stages in the shield pipe folding process has been described. However, the number of folding stages is not limited to two. For example, if a fixing means for securely fixing the end 2a of the braided wire 2 to the end 1a of the shield pipe 1 is provided separately, it is sufficient to fold the end 1a of the shield pipe 1 in one step. Alternatively, the end 1a of the shield pipe 1 may be folded back in three or more stages in order to further increase the reliability of the fixed state of the end 2a of the braided wire 2.

  In the first embodiment described above, in the shield pipe folding step, the braided wire 2 is provided around the outer periphery of the shield pipe 1, the shield pipe 1 is folded back together with the braided wire 2, and then the braided wire 2 is turned outside. Explained the case. However, conversely, the braided wire 2 may be provided around the inner periphery of the shield pipe 1, the shield pipe 1 may be folded back together with the braided wire 2, and then the braided wire 2 may be reversed inside.

  The present invention can be widely applied to various industrial fields such as automobiles, airplanes, trains, manufacturing plants, electrical appliances, and OA equipment.

It is sectional drawing which shows 1st Embodiment of the connection method of the shield pipe and braided wire which concern on this invention, (a) is a braided wire installation process figure, (b) is a shield pipe folding process figure, (c). Is a braided wire turning process diagram, (d) is a wire insertion process diagram. It is sectional drawing which shows the edge part crimping | compression-bonding process in 2nd Embodiment of the connection method of the shield pipe and braided wire which concern on this invention. It is a figure which illustrates the connection method of the conventional shield pipe and a braided wire, Comprising: (a) is sectional drawing containing the axial center of a shield pipe, (b) is sectional drawing by CC line of (a). .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Shield pipe 1a ... End part 2 ... Braided wire 2a ... End part 2b ... Remaining part 3 ... Electric wire bundle 5 ... Electric wire 7 ... Caulking ring 9 ... Edge processing ring 10 ... Conduction path 12 ... Crimping auxiliary member

Claims (3)

Place a cylindrical braided wire around the shield pipe,
The end of the shield pipe is folded back in a trumpet shape together with the end of the braided wire, and the end of the braided wire is fixed to the end of the shield pipe,
A method of connecting a shield pipe and a braided wire, wherein the remaining part of the braided wire is turned over.   The method for connecting a shield pipe and a braided wire according to claim 1, wherein the shield pipe is folded in a plurality of stages. A connection structure between a shield pipe and a braided wire, in which a cylindrical braided wire is conductively connected to the shield pipe,
A connection structure between a shield pipe and a braided wire, wherein an end of the shield pipe and an end of the braided wire are folded back in a trumpet shape and fixed to each other.

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