JP2006254596A - Protection structure of wire harness branching section, and forming method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protection structure of a wire harness branching section capable of ensuring flexibility at a branching section and the degree of freedom in a branching direction even after fitting a protective material to the branching section. <P>SOLUTION: A long, cylindrical tube, which is made of a flexible resin and axially has a slit 14a, is used as the protective material 14. The tube 14 is cut so that it is square in the expanded state for bending while a pair of front and rear triangles projects from a base 14b. The base 14b is brought into contact with the lower-surface side of a main 12. Vertexes 14d, 14e of the front and rear triangles are brought into contact with the front and rear surfaces of a guy for winding around a tape. Both the ends of the base 14b are wound around the main 12, and the protective structure of the branching section is formed while the branching section 11 of the wire harness is surrounded by the protective material 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for forming a protection structure for a wire harness branching portion and a protection structure for a wire harness branching portion, and more specifically, the flexibility of the branching portion even in a state where a resin protective material that is covered for protection of the branching portion is mounted. It is intended to ensure the sex.

  Conventionally, there are two types of protective devices that protect the branch part that branches in a T-shape in the wire harness from the burr of the vehicle body, and those that are protected by a resin protector and those that are protected by a flexible material. is there. In particular, when it is necessary to bend the branch portion and attach it to a required portion of the vehicle body, it is suitable to protect it with a flexible sheet. As a structure protected by a sheet, a structure described in Japanese Utility Model Laid-Open No. 57-107225 (Patent Document 1) is known. As shown in FIG. 6 (A), the upper and lower sides of the branch portion 1 are sandwiched between soft resin sheets 2, and the resin sheets 2 are sewn together with sewing threads 3 along the inner corners of the trunk line Wa and the branch line Wb. Thus, the branch portion 1 is protected by the resin sheet 2.

  On the other hand, Japanese Patent Application Laid-Open No. 2001-135173 (Patent Document 2) describes a structure in which the branch portion 5 is protected by a dedicated sheet 4 for binding the branch portions as shown in FIG. Yes. The sheet 4 is folded in half with the branch portion 5 interposed therebetween, and a folded portion 4a formed by folding the corner portion of the lower surface portion of the sheet 4 inwardly at an inner corner portion between both sides of the branch line Wb and the trunk line Wa. The corner portion of the upper surface portion of the sheet 4 is folded to the back side of the lower surface portion so as to sandwich the folded portion 4a to form a pressing portion 4b, and an adhesive surface on which an adhesive material is applied to a part of the pressing portion 4b 4c. And the upper surface part of the sheet | seat 4 is adhere | attached on the back side of a lower surface part by the adhesive surface 4c, and it is made to protect in the state which wrapped the branch part 5. FIG.

Japanese Utility Model Publication No. 57-107225 JP 2001-135173 A

However, in the case shown in FIG. 6 (A), when the resin sheet 2 is attached to the branch portion 1, a sewing operation with the sewing thread 3 along the T-shaped branch portion 1 is involved. In addition, since the resin sheet 2 is in close contact along the branching direction of the branching portion 1, the flexibility of the branching portion 1 is lost and the wiring work of the wire harness in a narrow space becomes difficult. there were. In addition, in the setting where there are a plurality of branches in the branch part 1, it is more difficult to mount the protective material using the sewing thread 3.
In addition, since the sheet shown in FIG. 6B requires a dedicated sheet 4 having an adhesive surface 4c in which an adhesive material is previously applied to a specific portion, the cost is increased and both sides of the branch line Wb are connected. Since the sheet 4 is folded at the inner corner between the main line Wa and bonded by the holding part 4b, the flexibility of the branch part 5 is lost as in the case of FIG. There was a problem that the routing workability of the machine deteriorated.

  The present invention has been made in view of the above-described problems, and can use a general-purpose protective material, and can ensure the flexibility of the branch portion and the degree of freedom in the branch direction even after the protective material is attached to the branch portion. It is an object of the present invention to provide a protection structure and a forming method for a wire harness branching portion.

In order to solve the above problems, in the present invention, a method for forming a protective structure of a wire harness branching portion in which a branch line branches from a trunk line,
Using a long cylindrical tube made of a flexible resin and having a slit in the axial direction as a protective material,
Cut the tube into a square in the unfolded state,
Bending the tube with a pair of front and rear triangles protruding from the bottom,
The bottom side is brought into contact with the lower surface side of the trunk line, and the apex portions of the front and rear triangles are brought into contact with both front and rear surfaces of the branch line,
Tape the front and rear apexes to a branch line, tape both ends of the base to the trunk line, or tape the front and rear apexes to a branch line and tape one end of the base to the main line A method for forming a protective structure for a wire harness branching portion is provided, wherein the protective material surrounds the branching portion of the wire harness.

  If it does in this way, the protective material of a branch part can be prepared only by cut | disconnecting to the simple shape which uses the cylindrical tube which has a general purpose slit, and a deployment shape becomes a square. And, in a state where this tube is folded in a triangle shape, it is possible to protect the bifurcated portion so as to wrap it from both sides, and it is easy to simply tape the end portion of the bottom side and the front and rear apex portions to the trunk line and the branch line, respectively. A tube can be attached to the branch portion for protection.

  Further, in the protection structure for the wire harness branch portion formed by the above method, the inner portion between the main line and both sides of the branch line is opened without being taped in a state where the tape is attached to the branch portion. Thus, the branch line can be freely tilted to some extent without losing the flexibility of the branch line with respect to the main line, and the workability of the wiring work of the wire harness in the narrow space of the vehicle can be improved.

In the protective structure, another branch line may be extended from the hypotenuse portion of the triangle that is not wound around the tape.
If configured in this way, the hypotenuse portion of the triangle in the inner part between the main line and both sides of the branch line is in an open state. Therefore, when the branch line needs to be further branched, this open part The branch line can be extended in an arbitrary direction. Therefore, it can respond to the branch form of various branch parts with a common protective material, without requiring a special protective material.

  As is clear from the above description, according to the method for forming a protective structure for a wire harness branching portion and a protective structure for a wire harness branching portion according to the present invention, a slit can be used without using a dedicated protective material depending on the form of the branching portion. Since an enclosed cylindrical resin tube can be used, it is possible to reduce the cost of the protective structure of the branch portion. In addition, the protective material can be attached to the branch part simply and reliably by simply folding the tube expanded in a square shape into two triangles, sandwiching the branch part, and winding each apex part onto a wire harness. it can. In addition, since the protective material after installation is in a state where the hypotenuses of the triangles on both sides of the branch line are open, the branch line can be tilted to exhibit flexibility, improving the wiring workability of the wire harness can do. Further, it is possible to further extend other branch lines from the open oblique sides of the triangles on both sides of the branch line, and it is possible to cope with various branching forms.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a first embodiment of a protective structure for a wire harness branching portion. As the branching portion 11, a branch line 13 that branches from the middle of a trunk line 12 constituting a wire harness branches in a T-shape. Is attached to the main line 12 and the branch line 13 by winding the tape T at three places. As shown in FIG. 2A, the protective material 14 is made of a commonly used flexible resin material and is a long cylindrical tube having slits 14a in the axial direction. The protective material 14 is sized to have a sufficient area to cover the branching portion 11 when folded in a triangular shape with one diagonal line as the base, and has a developed shape as shown in FIG. Cutting is used to form a square.

  To attach the protective member 14 to protect the branching portion 11, as shown in FIG. 3 (A), first, a pair of front and rear triangular covering surfaces with one diagonal line of the protective member 14 serving as a base 14b. The base 14b is brought into contact with the lower surface side of the main line 12 as shown in FIG. Next, the apex portions 14 d of the upper and lower covering surfaces 14 c are brought into contact with the front and rear surfaces of the branch line 13. As a result, both the front and rear surfaces of the trunk line 12 and the branch line 13 are sandwiched between the two covering surfaces 14 c of the protective material 14 that is bent, and the branching portion 11 has triangular shapes on both outer surfaces of the trunk line 12 and both front and rear surfaces of the branch line 13. The apex portions 14d, 14e, and 14f are arranged.

  Next, as shown in FIG. 3C, the front and rear apexes 14d on the covering surface 14c are wound around the branch line 13 by the tape T, and the apexes 14e and 14f at both ends of the base 14b are similarly wound on the trunk 12 by the tape T. Wrap and fix. Thereby, the protective material 14 is fixed in the state which enclosed the branch part 11, without shifting with respect to the trunk line 12 and the branch line 13 (FIG. 1). Further, the protective material 14 is fixed to the branching portion 11 between the apex portion 14d and the apex portion 14e, and the hypotenuse portion 16 between the apex portion 14d and the apex portion 14f is closed at the edges of the upper and lower covering surfaces 14c. Thus, the openings 15a and 15b are provided.

  The wire harness branching portion protection structure of the first embodiment configured by the above forming method has openings 15a and 15b in which the end portions of the protective material 14 are not closed at the inner corners between the trunk line 12 and the branch line 13. Therefore, the branch line 13 can exhibit a certain degree of flexibility with respect to the main line 12 and can be tilted. For this reason, when the wire harness is routed to the vehicle body, when the wire harness is routed along a narrow route, the branch line 13 follows and tilts so that the workability due to the catching of the branch portion 11 is difficult. Can be reduced.

  In the above embodiment, the example in which the apex portions 14e and 14f at the both ends of the base 14b are fixed by wrapping the tape T with the tape T is shown. The location is not limited to both ends, and may be only one of the apexes 14e and 14f. Even in this case, the protective material 14 can be stably fixed to the branch portion 11 and the flexibility of the branch line 13 with respect to the trunk line 12 can be maintained.

FIG. 5 shows the second embodiment, and in addition to the T-shaped branch shape of the trunk line 22 and the branch line 23 as the branch part 21, another branch line 23 a is provided between the trunk line 22 and the branch line 23. A branched shape in four directions is formed. Even in this case, the method of forming the protective member 24 on the branch portion 21 is performed in the same procedure as in the first embodiment, and the vertex portions 24d, 24e, and 24f are wound and fixed to the trunk line 22 and the branch line 23 with the tape T. Thus, a protective structure can be formed. At this time, the added branch line 23a can be taken out in an arbitrary direction by extending outward through the opening portion 25a of the hypotenuse portion 26 of the triangle between the vertex portions 24d and 24e.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted. Moreover, in the said 2nd Embodiment, although the example which added the additional branch line 23a 1 direction was shown, two or more branch lines can also be extended outside.

(A) is a figure which shows 1st Embodiment of the protection structure of the wire harness branch part in this invention. (A) is a perspective view of a protective material, (B) is an expanded view of a protective material. (A)-(C) are figures which show the formation process of the protection structure of the wire harness branch part in 1st Embodiment. It is a figure which shows the modification of 1st Embodiment. It is a figure which shows the protection structure of the wire harness branch part of 2nd Embodiment. (A)-(C) are figures which show a prior art example.

Explanation of symbols

11, 21 Branch portion 12, 22 Trunk line 13, 23, 23a Branch line 14, 24 Protective material 14a Slit 14b Bottom side 14d, 14e, 14f, 24d, 24e, 24f Vertex portion 16, 26 Oblique side portion

Claims (3)

A method for forming a protective structure of a wire harness branching portion in which a branch line branches from a main line,
Using a long cylindrical tube made of a flexible resin and having a slit in the axial direction as a protective material,
Cut the tube into a square in the unfolded state,
Bending the tube with a pair of front and rear triangles protruding from the bottom,
The bottom side is brought into contact with the lower surface side of the trunk line, and the apex portions of the front and rear triangles are brought into contact with both front and rear surfaces of the branch line,
Tape the front and rear apexes to a branch line, tape both ends of the base to the trunk line, or tape the front and rear apexes to a branch line and tape one end of the base to the main line A method for forming a protective structure for a wire harness branching portion, wherein the protective material surrounds the branching portion of the wire harness.   The protective structure of the wire harness branch part formed by the method of Claim 1.   The protective structure of the wire harness branch part according to claim 2, wherein another branch line extends from a hypotenuse portion of the triangle that is not wound around the tape.

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