JP6641575B2 - Structure for preventing misalignment between conductive path and shield member, and wire harness - Google Patents

Description

  The present invention relates to a structure for preventing a deviation between a conductive path and a shield member. Further, the present invention relates to a wire harness employing this structure.

  For example, a wire harness is used to electrically connect high-voltage devices mounted on a hybrid vehicle or an electric vehicle. The wire harness includes a conductive path, a shield member that covers the conductive path, and an exterior member. Since the wire harness has a high voltage as described above, the shield member effectively functions to prevent peripheral devices from malfunctioning due to noise radiated from the conductive path.

  The shield member 26 disclosed in this document will be described with reference to drawings (FIGS. 1 and 2) and reference numerals in Patent Document 1 below. And a holding member 28 used after worship winding. The sheet-like member 27 is a member in which, when the two high-voltage electric wires 25 which are conductive paths are wrapped around, the two high-voltage electric wires 25 are surrounded in a “buzzy” state to form a tubular portion 29. . In addition, the sheet-like member 27 is a member on which both ends in the width direction are overlapped to form the overlapped portion 30. The overlapping portion 30 is folded down and made to follow the tubular portion 29. Then, the state of the alignment is held by the holding member 28. The holding member 28 is a tape, and is wound at such an interval that the high-voltage wires 25 do not protrude from the overlapping portion 30.

JP 2012-29385 A (Page 6-7, FIG. 1-2)

  By the way, in the above-mentioned prior art, the cylindrical portion 29 is formed by surrounding the two high-voltage electric wires 25 that are the conductive paths in a “buzzy” state. Therefore, since the shield member 26 having such a tubular portion 29 is employed, there is a concern that the shield member 26 may be displaced from the high-voltage wire 25.

  Further, in the above-described conventional technology, since the wire harness 21 has a structure in which the two high-voltage electric wires 25 covered by the shield member 26 are protected by the exterior member 24, the connection between the shield member 26 and the exterior member 24 is prevented. The gap is also a concern.

  The present invention has been made in view of the above circumstances, and has an object to provide a structure capable of preventing a deviation between a conductive path and a shield member, that is, a structure for preventing a deviation between a conductive path and a shield member. I do. It is another object of the present invention to provide a wire harness that employs such a displacement prevention structure and can also prevent displacement between a shield member and an exterior member.

According to a first aspect of the present invention, there is provided a structure for preventing misalignment between a conductive path and a shield member, comprising: a conductive path; and a shield member that covers the conductive path. the position, the and the intermediate member for regulating the interposed and misalignment between the conductive path and the shield member, a fixing member for adding force toward the conductive path from the outer side of said shield member, said fixing member and said A damage prevention portion interposed between the shield members to prevent damage to the shield member is provided.

  According to a second aspect of the present invention, in the structure for preventing displacement between the conductive path and the shield member according to the first aspect, the intervening member has elasticity.

  According to a third aspect of the present invention, in the structure for preventing misalignment between the conductive path and the shield member according to the first or second aspect, the shield member has elasticity or extra length corresponding to the bending of the conductive path. It is characterized by

  According to a fourth aspect of the present invention, there is provided a wire harness including: a conductive path; a shield member that covers the conductive path; and the conductive path covered by the shield member. In a wire harness including a tube-shaped exterior member to be protected, at least at a position of a portion derived from an end of the exterior member, an intervening member interposed between the conductive path and the shield member and restricting displacement. And a fixing member that applies a force from the outside of the shield member toward the conductive path, further interposed between the shield member and the fixing member over the end portion and the lead-out portion. A second fixing member for fixing the end portion and the lead-out portion in a state is provided.

  According to a fifth aspect of the present invention, in the wire harness according to the fourth aspect, the fixing by the second fixing member is a tape winding.

  According to the first aspect of the present invention, an interposition member for regulating displacement is interposed between the conductive path and the shield member, and a force is applied from the outside of the shield member to the conductive path using the fixing member. Since the structure is added, it is possible to prevent a deviation between the conductive path and the shield member.

  According to the second aspect of the present invention, since the intervening member has elasticity, when a force is applied from the outside of the shield member toward the conductive path by the fixing member, the intervening member is elastically deformed. Can be. A force for restoring is generated in the elastically deformed intervening member, and the force continues to act so as to intersect in the shift direction, so that the gap between the conductive path and the shield member can be maintained. Therefore, there is an effect that it is possible to contribute to prevention of displacement between the conductive path and the shield member.

  According to the third aspect of the present invention, the following effects are further exhibited in addition to the effects of the first or second aspect. That is, by providing the shield member with elasticity or extra length while having a structure in which displacement is prevented, there is an effect that it is possible to cope with bending of the conductive path (bending of the wire harness).

  According to the present invention as set forth in claim 4, an interposition member for regulating displacement is interposed between the conductive path and the shield member, and a force is applied from the outside of the shield member to the conductive path using the fixing member. It is a structure to be added, and a structure in which an end of the exterior member and a portion derived from the end are fixed by the second fixing member in a state interposed between the shield member and the fixing member. Accordingly, an effect is obtained in which a deviation between the conductive path, the shield member, and the exterior member in the wire harness can be prevented.

  According to the fifth aspect of the present invention, the following effect is further obtained in addition to the effect of the fourth aspect. That is, there is an effect that the deviation between the end of the exterior member and the portion derived from the end can be regulated by winding the tape.

It is an enlarged view showing the composition of the wire harness which adopted the shift prevention structure of the present invention. FIG. 2 is a perspective view showing a displacement prevention structure in FIG. 1. FIG. 2 is a cross-sectional view illustrating a displacement prevention structure in the exterior member of FIG. 1.

  The wire harness includes a conductive path, a shield member that covers the conductive path, and a tubular exterior member that inserts and protects the conductive path covered with the shield member. In the wire harness having such a configuration, an intervening member, a fixing member, and a second fixing member are disposed at a position of a portion derived from an end of the exterior member. The intervening member has a function of interposing between the conductive path and the shield member to regulate a deviation therebetween. Further, the fixing member has a function of applying a force from the outside of the shield member toward the conductive path. The second fixing member has a function of fixing the end portion of the exterior member and the lead-out portion. The interposition member and the fixing member are effective as a structure for preventing a deviation between the conductive path and the shield member. Further, the second fixing member is effective as a structure for preventing a displacement between the shield member and the exterior member.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is an enlarged view showing a configuration of a wire harness adopting the displacement prevention structure of the present invention. FIG. 2 is a perspective view showing the displacement prevention structure of FIG. 1, and FIG. 3 is a cross-sectional view showing the displacement prevention structure in the exterior member of FIG.

<About wire harness 1>
In FIG. 1, a wire harness 1 includes two electric wires 2 (conductive paths), a shield connector 3 provided at an end of the two electric wires 2, and a shield member 4 that collectively covers the two electric wires 2. And an exterior member 5 for inserting and protecting the electric wire 2 covered by the shield member 4. The wire harness 1 having such a configuration employs the displacement prevention structures 6 and 7 according to the present invention. Hereinafter, each configuration will be described.

<About wire 2>
1 and 2, the electric wire 2 includes a conductive conductor 8 and an insulating insulator 9 that covers the conductor 8. The conductor 8 is formed in a circular cross section from copper, a copper alloy, aluminum, or an aluminum alloy. The conductor 8 has a conductor structure formed by twisting element wires, or a rod-shaped conductor structure having a rectangular or circular (round) cross section (for example, a conductor structure having a single rectangular core or a single round core. , The electric wire itself also becomes rod-shaped). An insulator 9 made of an insulating resin material is extrusion-molded on the outer surface of the conductor 8 as described above.

  The insulator 9 is extruded on the outer peripheral surface of the conductor 8 using a thermoplastic resin material. The insulator 9 is formed as a coating having a circular cross section. The insulator 9 is formed having a predetermined thickness. As the thermoplastic resin, various known types can be used. For example, the thermoplastic resin is appropriately selected from polymer materials such as polyvinyl chloride resin, polyethylene resin, and polypropylene resin.

  The conductive path described in the claims is not limited to the high-voltage or low-voltage electric wire 2, but may be, for example, a bus bar coated with an insulator. The number of the electric wires 2 is an example. That is, for example, when used as a motor cable, three cables may be used. It may be one or four or more.

<About shield connector 3>
In FIG. 1, a shield connector 3 includes a terminal fitting (not shown) provided at an end of the electric wire 2, a connector housing (not shown) that accommodates the terminal fitting, a conductive shield shell 10 provided outside the connector housing, A crimping ring 11 for fixing one end of the shield member 4 to a part of the shield shell 10 is provided.

<About shield member 4>
1 and 2, a shield member 4 is a member for electromagnetic shielding (a shield member for preventing electromagnetic waves) that covers the two electric wires 2 collectively, and is formed by knitting a large number of strands into a tubular shape. A known braid is employed. The shield member 4 is formed to have substantially the same length as the entire length of the two electric wires 2. This end of the shield member 4 is fixed to the shield connector 3, and is connected to a shield case or the like of a device (not shown) via the shield connector 3.

  Since the shield member 4 is a braid as described above, it has flexibility and elasticity. By having flexibility and elasticity, the shield member 4 can be expanded and contracted in accordance with, for example, bending of the electric wire 2. In addition, since the stitches 12 are formed in the braid, the frictional resistance increases on both the front and back sides. Therefore, it is effective in preventing a deviation from a member in contact with the shield member 4.

  As the shield member 4, for example, a metal foil having conductivity or a member including the metal foil may be adopted as long as measures against electromagnetic waves can be taken. In this case, since the elasticity as in the braid may not be obtained in some cases, it is effective to provide a surplus length, for example, as a portion for following the bending of the electric wire 2.

  The shield member 4 is formed in a cylindrical shape having an internal space that comes into contact with the two electric wires 2. In other words, it is formed in a cylindrical shape having an internal space that does not make it "blur" as in the conventional example.

<About exterior member 5>
In FIGS. 1 and 2, the exterior member 5 is formed into one straight tubular body by resin molding (there is a straight tube before use). The exterior member 5 is formed in a bellows tube shape (this is an example). Specifically, it has a bellows concave portion 13 and a bellows convex portion 14 in the circumferential direction, and is formed such that the bellows concave portion 13 and the bellows convex portion 14 are alternately continuous in the tube axis direction. The exterior member 5 is formed into a shape that can be bent at a desired angle when the wire harness 1 is packed, transported, or routed to a vehicle. The exterior member 5 is flat in this embodiment, but is not limited to this, and may be round or the like.

  The exterior member 5 is formed shorter than the entire length of the electric wire 2 covered by the shield member 4. Thereby, when the electric wire 2 covered by the shield member 4 is inserted into the exterior member 5 (to be stored and protected), two electric wires 2 covered by the shield member 4 are led out from the opening at the end 15 of the exterior member 5. (This is referred to as a derived portion 16). It is assumed that the shield connector 3 is assembled after the lead-out portion 16 is led out.

<About the derivation part 16>
In FIGS. 1 and 2, the length of the lead-out portion 16 is set to a length that facilitates an electrical connection operation via the shield connector 3. The lead-out portion 16 is shown in an exposed state in this embodiment, but is not limited to this. That is, it may be covered with rubber or elastomer boots. If a boot is used, it is of course possible to prevent moisture from entering the inside of the wire harness 1. Regarding the boot, it is also possible to use it as a second fixing member instead of the tape winding 19 described later.

<About displacement prevention structure 6>
In FIGS. 1 and 2, the displacement prevention structure 6 prevents displacement between the two electric wires 2 and the shield member 4 and displacement between the end 15 of the exterior member 5 and the lead-out portion 16 (shield member 4). And is adopted at the position of the lead-out portion 16. In the present embodiment, the displacement prevention structure 6 is realized by including an elastic intervening member 17 (intervening member), a binding band 18 (fixing member), and a tape winding 19 (second fixing member). When the boot 16 made of rubber or elastomer is used to cover the lead-out portion 16, the boot functions as a second fixing member instead of the tape winding 19. That is, when the boot is used, the tape winding 19 is not used. Is also good).

<About the elastic intervening member 17 (intervening member)>
1 and 2, an elastic intervening member 17 is a member interposed between the two electric wires 2 and the shield member 4, for example, a sheet-shaped or band-shaped main body made of EPDM rubber foam, and the main body. And an adhesive portion provided on one surface of the substrate. The main body has elasticity and a desired frictional force, and its thickness is appropriately set. This setting is arbitrary for the adhesive portion. The elastic intervening member 17 is formed in such a size that it can be wound around the two electric wires 2 arranged side by side and fixed thereto.

<About the binding band 18 (fixing member)>
In FIGS. 1 and 2, the fixing member is a member that can apply a force from the outside of the shield member 4 to the two electric wires 2. In this embodiment, a binding band 18 is employed. The binding band 18 is used after a tape winding 19 is interposed between the binding band 18 and the shield member 4 in the case of the displacement prevention structure 6. It should be noted that the fixing member may be replaced with a tape wound tightly (wound tightly), a string, the use of a holding member, or the like.

<About the tape winding 19 (second fixing member)>
In FIGS. 1 and 2, the tape winding 19 is formed by applying the tape T from the end portion 15 to the lead-out portion 16 so as to unwind the tape. When the tape winding 19 is formed, deviation between the end portion 15 and the lead-out portion 16 (the shield member 4) is regulated. As will be described below, since the binding band 18 is wound from above the tape winding 19, the deviation is further restricted (when the boot is used instead of the tape winding 19, the The binding band 18 is wound from above, so that the deviation between the end portion 15 and the lead-out portion 16 (shield member 4) is restricted).

  By forming the tape winding 19 (by assembling the boot), the shield member 4 is not damaged even if the binding band 18 is wound from the outside. That is, the tape winding 19 functions as a portion for preventing the shield member 4 from being damaged.

<About displacement prevention structure 7>
In FIG. 3 (in FIGS. 1 to 3), the displacement prevention structure 7 is adopted for a portion accommodated in the exterior member 5 unlike the above-described displacement prevention structure 6. The displacement prevention structure 7 is employed as a structure for preventing the displacement between the two electric wires 2 and the shield member 4 in the exterior member 5. The displacement prevention structure 7 is realized by including an elastic intervening member 17 (intervening member) and a binding band 18 (fixing member) (more preferably, further includes a tape winding 19 as shown in FIG. 3). By including the tape winding 19, it is of course possible to function as a portion for preventing the shield member 4 from being damaged).

<About the manufacturing method of the wire harness 1>
In the above configuration and structure, the wire harness 1 is manufactured as follows (the description here is an example).

  First, in the first step, an operation of forming the harness main body 20 by inserting the two electric wires 2 covered with the shield member 4 from one end to the other end of the exterior member 5 is performed. It should be noted that the displacement prevention structure 7 is formed before insertion into the exterior member 5. The displacement prevention structure 7 is configured such that the elastic intervening member 17 is wound around the two wires 2 at a desired position to fix them, and after this fixing, the elastic intervening member 17 is covered with the shield member 4. At the position where the tape winding 19 is formed, and finally, at the position where the tape winding 19 is formed and the position where the elastic interposed member 17 is wound, the two electric wires 2 are attached to the two electric wires 2 while attaching the binding band 18 from the outside of the shield member 4. It is formed by the operation of applying a force toward.

  Next, in the second step, an operation for forming the displacement prevention structure 6 is performed. The gap prevention structure 6 winds up the shield member 4 with respect to the lead-out portion 16 led out from the end portion 15 of the exterior member 5, and winds the elastic interposition member 17 around the two wires 2 side by side to fix them. Then, after this fixing, the wound up shield member 4 is returned to the original state, and the tape T is rolled down from the end 15 of the exterior member 5 to the lead-out portion 16 to form a tape winding 19. Finally, an operation of applying a force to the two electric wires 2 while attaching the binding band 18 from the outside of the shield member 4 at the position where the elastic interposition member 17 is wound and with the tape winding 19 interposed therebetween. Is formed.

  Subsequently, in a third step, an operation of providing the shield connectors 3 at both ends of the harness main body 20 is performed. Note that the third step and the second step may be interchanged. Thus, the manufacture of the wire harness 1 is completed.

<After manufacturing the wire harness 1>
After being manufactured as described above, the exterior member 5 is bent so as to be folded at a predetermined position. When the packing of the wire harness 1 is completed, the packed wire harness 1 is transported to the vehicle assembly site in a compact state. At the vehicle assembling site, first, the work of breaking the packing state is performed, and then, the work of attaching the wire harness 1 to the vehicle is performed. When a series of operations related to the attachment is completed, the wire harness 1 is in a state of being routed along a desired route.

<Summary and effect of the present invention>
As described above with reference to FIGS. 1 to 3, the wire harness 1 includes the two electric wires 2, the shield member 4 that covers the two electric wires 2, and the two wires that are covered with the shield member 4. And an exterior member 5 for inserting and protecting the electric wire 2. In the wire harness 1 having such a configuration, an elastic intervening member 17, a binding band 18, and a tape winding 19 are disposed at a position of a lead-out portion 16 from the end 15 of the exterior member 5. Further, an elastic intervening member 17 and a binding band 18 are provided at positions accommodated in the exterior member 5.

  The elastic intervening member 17 has a function of interposing between the two electric wires 2 and the shield member 4 to regulate a deviation therebetween. In addition, the binding band 18 has a function of applying a force from the outside of the shield member 4 to the two electric wires 2. The tape winding 19 has a function of fixing the end portion 15 of the exterior member 5 and the lead-out portion 16.

  The elastic interposition member 17 and the binding band 18 are effective as a structure for preventing the two electric wires 2 from being displaced from the shield member 4 (displacement prevention structures 6, 7). Further, the tape winding 19 is effective as a structure for preventing a displacement between the shield member 4 and the exterior member 5 (a displacement prevention structure 6). Therefore, according to the present invention, there is an effect that the displacement can be prevented.

  In addition, according to the present invention, since the elastic interposition member 17 is provided with elasticity, when a force is applied from the outside of the shield member 4 to the two electric wires 2 by the binding band 18, the elastic interposition member 17 Can be elastically deformed. A force to be restored is generated in the elastically deformed elastic intervening member 17, and the force continues to act so as to intersect in the deviation direction. Therefore, the deviation between the two electric wires 2 and the shield member 4 is maintained. can do. Further, according to the present invention, since the shield member 4 has elasticity, it is possible to cope with bending of the wire harness 1 (bending of the electric wire 2).

  Of course, the present invention can be variously modified and implemented without departing from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... wire harness, 2 ... electric wire (conductive path), 3 ... shield connector, 4 ... shield member, 5 ... exterior member, 6, 7 ... displacement prevention structure, 8 ... conductor, 9 ... insulator, 10 ... shield shell, 11: caulking ring, 12: stitch, 13: bellows recess, 14: bellows convex, 15: end, 16 ... lead-out part, 17: elastic interposed member (interposed member), 18: binding band (fixed member), 19: Tape winding (second fixing member), 20: Harness body, T: Tape

Claims (5)

A conductive path, and a shield member that covers the conductive path, at least at a predetermined position in the full length direction, an intervening member that is interposed between the conductive path and the shield member and restricts displacement; A fixing member for applying a force toward the conductive path , and a damage prevention portion interposed between the fixing member and the shield member to prevent damage to the shield member. Structure to prevent the conductive path and the shield member from shifting. The structure for preventing displacement between the conductive path and the shield member according to claim 1,
A structure for preventing misalignment between a conductive path and a shield member, wherein the intervening member has elasticity. In the structure for preventing displacement between the conductive path and the shield member according to claim 1 or 2,
A structure for preventing a gap between a conductive path and a shield member, wherein the shield member has elasticity or extra length corresponding to bending of the conductive path. In a wire harness including a conductive path, a shield member that covers the conductive path, and a tubular exterior member that inserts and protects the conductive path covered by the shield member,
An intervening member interposed between the conductive path and the shield member and restricting displacement is provided at least at a position of a portion derived from the end of the exterior member, and a force is applied to the conductive path from outside the shield member. A second fixing member is provided to fix the end portion and the lead-out portion in a state interposed between the shield member and the fixing member over the end portion and the lead-out portion. A wire harness comprising a fixing member. The wire harness according to claim 4,
A wire harness, wherein the fixing by the second fixing member is a tape winding.

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