Branch section protection structure and branch section protection method

Abstract

To provide a branch portion protection structure capable of protecting a branch portion with a simple structure.SOLUTION: In a wire harness 10 inserted inside a main tubular protection member 20 and a branch tubular protection member 50, a branch portion protection structure 1 for protecting a branch portion 13 at which a branch line 12 is branched from a main trunk line 11 includes a main tubular protection member 20 into which the main trunk line 11 is inserted, and a branch tubular protection member 50 into which the branch line 12 is inserted. The main tubular protection member 20 includes a first side main tubular protection member 30 arranged on a base end side Lb from the branch portion 13, and a second side main tubular protection member 40 arranged on a distal side Lf from the branch portion 13. The branch tubular protection member 50 is arranged on the distal side Lf from the branch portion 13. An end portion on the branch portion 13 side of the first side main tubular protection member 30 is a double inclined portion 32 along an inclined direction intersecting both a longitudinal direction L1 and an orthogonal direction W1. The end portions on the branch portion 13 side of the first side main tubular protection member 30, the second side main tubular protection member 40, and the branch tubular protection member 50 face one another.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a branch portion protection structure and a branch portion protection method for protecting, for example, a branch portion where a branch line is branched off from a main line. [Background technology]

[0002] The long wire harnesses that electrically connect the electrical devices installed in automobiles are routed in two-dimensional or three-dimensional complex routing paths that combine straight and curved sections to fit the uneven shape of the vehicle.

[0003] This wire harness is flexible and may be protected by being inserted into an exterior body such as a hollow corrugated tube (hereinafter, referred to as a corrugated tube) having a long shape. However, at a branching portion where a branch wire branches off from a main wire of the wire harness, the branch wire interferes with the corrugated tube, and therefore the branching portion cannot be inserted into the corrugated tube.

[0004] For this reason, a cylindrical hard protector that branches out along the direction in which the main trunk line and the branch line extend has been attached to the branch point between the main trunk line and the branch line, and the branch point has been protected by surrounding it with the protector (see Patent Document 1).

[0005] However, the branching direction of the branch line and the outer diameter of the corrugated exterior of the main line vary depending on the installation location, and the shapes of the branching parts are diverse. Therefore, it was necessary to prepare a hard protector that was suitable for each branching part. Therefore, a branching part protection structure that could protect the branching part with a simpler structure was required. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 10-084611 Summary of the Invention [Problem to be solved by the invention]

[0007] In view of the above-mentioned problems, an object of the present invention is to provide a branch portion protecting structure and a branch portion protecting method that can protect a branch portion with a simple structure. [Means for solving the problem]

[0008] The present invention relates to a branch portion protection structure for protecting a branch portion at which a branch wire is branched off from a main trunk line in which a plurality of bundled electric wires are inserted into a flexible tubular protection member, the branch portion protection structure being provided with a tubular main tubular protection member through which the main trunk line is inserted, and a tubular branch tubular protection member through which the branch wire is inserted, the main tubular protection member including a first side main tubular protection member disposed on a first side of the branch portion in the axial direction, and a second side main tubular protection member disposed on the first side of the branch portion in the axial direction. and a second-side main tubular protective member disposed on a second side of the branch portion in the axial direction, the branch pipe protective member being disposed on the second side of the branch portion, the first-side main tubular protective member, the second-side main tubular protective member, and the branch pipe protective member forming a bifurcated branch, and any of the ends of the first-side main tubular protective member, the second-side main tubular protective member, and the branch pipe protective member on the branch portion side is an inclined end portion extending along an inclined direction intersecting both a longitudinal direction and an orthogonal direction perpendicular to the longitudinal direction, The first-side main tubular protective member, the second-side main tubular protective member, and the branch tubular protective member have end portions on the branching portion side opposed to each other, and the end portion of the first-side main tubular protective member has two inclined end portions that protrude in a tapered manner toward the second side so as to face the end portions of the second-side main tubular protective member and the branch tubular protective member that are arranged so as to be spaced apart as they move away from the branching portion along the axial direction. It is characterized by:

[0009] The present invention also provides a branch portion protection method for protecting a branch portion at which a branch wire branches off from a main trunk line in which a plurality of bundled electric wires are inserted inside a flexible tubular protective member, the branch portion protection method including: a tubular main tubular protective member through which the main trunk line is inserted; and a tubular branch tubular protective member through which the branch wire is inserted; the main tubular protective member is composed of a first side main tubular protective member disposed on a first side in the axial direction from the branch portion; and a second side main tubular protective member disposed on a second side in the axial direction from the branch portion; any of the end portions of the first side main tubular protective member, the second side main tubular protective member, and the branch tubular protective member on the branch portion side is an inclined end portion extending along an inclined direction that intersects both a longitudinal direction and an orthogonal direction perpendicular to the longitudinal direction; end portions of the first-side main tubular protective member, the second-side main tubular protective member, and the branch tubular protective member on the branching portion side face each other, and the end portion of the first-side main tubular protective member has two inclined end portions that protrude in a tapered manner toward the second side so as to face the end portions of the second-side main tubular protective member and the branch tubular protective member that are arranged so as to be spaced apart as the end portion moves away from the branching portion along the axial direction, The method is characterized in that it includes a first main trunk insertion process of inserting the main trunk arranged on a first side in the axial direction into the first side main tubular protective member, a second main trunk insertion process of inserting the main trunk arranged on a second side in the axial direction into the second side main tubular protective member, a branch trunk insertion process of inserting the branch trunk arranged on the second side of the branch portion into the branch pipe protective member, and a fixing process of fixing the first side main tubular protective member and the branch portion with tape and fixing the first side main tubular protective member, the second side main tubular protective member, and the branch pipe protective member, which have a bifurcated branch, with tape.

[0010] The main line and the branch line are names for convenience, and one of the electric wires branched into two at a branching portion is the main line and the other is the branch line, regardless of, for example, the diameter of the electric wire or the connection destination. The axial direction refers to a direction along one side of the main trunk line relative to the branching portion, in other words, a direction along one side of the main trunk line disposed on the first side or the second side relative to the branching portion.

[0011] The tubular protective member includes, for example, a corrugated member having a repeated concave and convex shape along the longitudinal direction, a flexible cylindrical tube, etc. The tubular protective member also includes a member having a circular or polygonal cross section perpendicular to the axial direction.

[0012] The first main tubular protective member and the second main tubular protective member may be integral with each other or may be separate from each other. The inclined end portion includes a double-sided inclined shape tapering from both sides in the width direction toward the inside in the width direction as it approaches the branching portion, when viewed from the inclination direction of the inclined end portion relative to the longitudinal direction and from a direction perpendicular to the longitudinal direction, and a single-sided inclined shape tapering from one side in the width direction toward the other side in the width direction as it approaches the branching portion.

[0013] According to this invention, it is possible to reduce gaps formed between the first-side main tubular protective member, the second-side main tubular protective member, and the branch tubular protective member assembled at the branching section where the branch line branching off from the main line is inclined with respect to the axial direction of the main line, thereby making it possible to cover the branching section where the branch line is inclined with respect to the axial direction with the first-side main tubular protective member, the second-side main tubular protective member, and the branch tubular protective member.

[0014] In this way, with a simple structure in which any of the ends of the first side main tubular protective member, the second side main tubular protective member, and the branch tubular protective member on the branch side are made inclined ends, it is possible to easily protect the branch portion where the branch line is inclined relative to the main line.

[0015] Also, The first side main tubular protective member, the second side main tubular protective member, and the branch tubular protective member have their ends on the branching portion side opposed to each other. There are. This means: By abutting the branch portion side ends of the first side main tubular protective member, the second side main tubular protective member, and the branch tubular protective member, the branch portion protective structure can be made compact.

[0016] And again The end of the first side main tubular protective member is a pair of inclined end portions that protrude tapered toward the second side so as to face the end of the second side main tubular protective member and the end of the branch tubular protective member that are arranged so as to be spaced apart as they move away from the branch portion along the axial direction. be. The two inclined end portions may have the same or different inclination angles toward the second side.

[0017] This means: By adjusting the inclination angle of both tapered end portions, it is possible to accommodate branch lines that branch off in various directions from the main line, making it easier to protect the branching portion where the branch lines branch off in various directions from the main line.

[0018] In addition, by making the end of the first side main tubular protective member on the branching portion side into two tapered inclined end portions, it becomes easier to position the two inclined end portions in the gap formed between the second side main tubular protective member and the branch tubular protective member, thereby more reliably reducing the gap formed between the first side main tubular protective member, the second side main tubular protective member, and the branch tubular protective member.

[0019] In another aspect of the present invention, the ends of the second side main tubular protective member and the branch tubular protective member, which are arranged to move apart as they move away from the branching portion along the axial direction, may be configured with the inclined end portion so as to face the end portion of the first side main tubular protective member.

[0020] According to this invention, by adjusting the inclination angle of each of the inclined end portions of the second main tubular protective member and the branch tubular protective member, it is possible to accommodate branch lines that branch in various directions at various angles relative to the trunk line, thereby providing better protection for the branched portion.

[0021] Furthermore, when the end portions of the first-side main tubular protective member, the second-side main tubular protective member, and the branch tubular protective member on the branching portion side are each inclined end portions, the branching portion can be covered by the tip portions of the inclined end portions of each tubular protective member, which makes it possible to make each tubular protective member more compact than when the end portion of at least one of the first-side main tubular protective member, the second-side main tubular protective member, and the branch tubular protective member on the branching portion side is not inclined.

[0022] In another aspect of the present invention, the first side main tubular protective member and the second side main tubular protective member may be formed separately, and at least the first side main tubular protective member and the second side main tubular protective member may have the same diameter. According to this invention, the first side main tubular protective member and the second side main tubular protective member can be easily assembled without any gaps, and the main tubular protective member can be made compact along the longitudinal direction of the main trunk line.

[0023] As another aspect of the present invention, the end portion of the first side main tubular protective member on the branch portion side may be the inclined end portion, and at least the first side main tubular protective member and the branch tubular protective member may have the same diameter. According to this invention, the end of the branch pipe protective member on the branching portion side can be easily formed to coincide with the inclined end of the first-side main tubular protective member on the branching portion side. This makes it possible to reduce at least the gap between the first-side main tubular protective member and the branch pipe protective member. Therefore, the branch pipe protective member can be easily assembled to the first-side main tubular protective member, and the branching portion can be reliably protected.

[0024] In another aspect of the present invention, any one or two of the first side main tubular protective member, the second side main tubular protective member, and the branch tubular protective member may be fixed to the branching portion with tape, and the tubular protective member fixed to the branching portion with tape and a tubular protective member that is not fixed to the branching portion may be fixed to the branching portion with tape.

[0025] According to this invention, one or two of the first side main tubular protective member, the second side main tubular protective member, and the branch tubular protective member can be securely fixed to the branching portion and positioned, and then the tubular protective members among the first side main tubular protective member, the second side main tubular protective member, and the branch tubular protective member that are not fixed to the branching portion with tape can be abutted and fixed against the tubular protective members that are fixed with tape, thereby more reliably protecting the branching portion.

[0026] As a further aspect of the present invention, the tubular protective member may be provided with the inclined end portion, and the inclined end portion may be fixed to the branch portion by tape. According to this invention, the inclined end portion arranged to cover the branching portion can be fixed to the branching portion with tape, so that the tubular protective member and the branching portion can be fixed to each other more firmly and reliably with tape. Therefore, the tubular protective member can be firmly fixed in position relative to the branching portion, and the branching portion can also be protected with tape. In addition, since the tubular protective member is arranged so that the inclined end portion covers the branching portion, it is easy to fix the tubular protective member and the branching portion with tape. Effect of the Invention

[0027] According to the present invention, it is possible to provide a branch portion protecting structure and a branch portion protecting method capable of protecting a branch portion with a simple structure. [Brief description of the drawings]

[0028] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] 4A and 4B are plan and side views of a first main tubular protective member. [Figure 4] 4A and 4B are plan and side views of a second main tubular protective member. [Diagram 5] 6 is a flowchart of a method for assembling a first main tubular protective member, a second main tubular protective member, and a branch tubular protective member to a branch portion. [Figure 6] 13 is a plan view illustrating a method of assembling a first main tubular protective member, a second main tubular protective member, and a branch tubular protective member to a branch portion. FIG. [Figure 7] 13 is a plan view illustrating a method of assembling a first main tubular protective member, a second main tubular protective member, and a branch tubular protective member to a branch portion. FIG. [Figure 8] FIG. 11 is a plan view illustrating a tubular protective member according to another embodiment. [Figure 9] FIG. 11 is a plan view illustrating a tubular protective member according to another embodiment. [Figure 10]FIG. 11 is a plan view illustrating a tubular protective member according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] An embodiment of the present invention will now be described with reference to FIGS. Fig. 1 shows a schematic perspective view of the bifurcation section protective structure 1, Fig. 2 shows a schematic exploded perspective view of the bifurcation section protective structure 1, Fig. 3 shows a plan view and a side view of the first side main tubular protective member 30, and Fig. 4 shows a plan view and a side view of the second side main tubular protective member 40. Fig. 5 shows a flowchart of a method for assembling the main tubular protective member 20 and the branch tubular protective member 50 to the bifurcation section 13. Figs. 6 and 7 show plan views explaining a method for assembling the main tubular protective member 20 and the branch tubular protective member 50 to the bifurcation section 13.

[0030] 3, 4, 6 and 7 will be described in detail. Figure 3(a) shows a plan view of the first side main tubular protective member 30, Figure 3(b) shows a side view of the first side main tubular protective member 30, Figure 4(a) shows a plan view of the second side main tubular protective member 40, and Figure 4(b) shows a side view of the second side main tubular protective member 40.

[0031] Fig. 6(a) shows a plan view of the first-side main tubular protective member 30, the second-side main tubular protective member 40, and the branch tubular protective member 50 inserted into the main trunk line 11 and the branch line 12, and Fig. 6(b) shows a plan view of the first-side main tubular protective member 30 fixed to the branch section 13. Fig. 7(a) shows a plan view of the second-side main tubular protective member 40 and the branch tubular protective member 50 assembled to the first-side main tubular protective member 30, and Fig. 7(b) shows a plan view of the second-side main tubular protective member 40 and the branch tubular protective member 50 fixed to the first-side main tubular protective member 30.

[0032] In order to make the overall structure easier to understand, the illustration of the raised portions (convex shape) and the groove portions (concave shape) of the corrugated wire, which has a repeated uneven shape with raised portions and groove portions, is omitted except in Figures 3 and 4. In addition, in Figures 1, 2, 6, and 7, the wire harness 10 (main wire 11 or branch wire 12) inserted into the first side main tubular protective member 30, the second side main tubular protective member 40, and the branch tubular protective member 50 is shown by dotted lines to clarify the shape. In addition, in order to clarify the configuration, the tape T is omitted in Figures 1, 8 to 10.

[0033] 1 is defined as a first direction L1, the longitudinal direction of the second main tubular protective member 40 is defined as a second direction L2, and the longitudinal direction of the branch tubular protective member 50 is defined as a branching direction B. The branched portion 13 side of the first main tubular protective member 30 along the first direction L1 is defined as a distal side Lf, and the opposite side of the branched portion 13 of the first main tubular protective member 30 along the first direction L1 is defined as a proximal side Lb. The upper and lower sides in FIG. 1 are defined as upper and lower.

[0034] That is, the direction in which the main trunk 11 extends from the base end side (axial direction) is the first direction L1, and the direction in which the branch wires 12 branch off from the main trunk 11 is the branching direction B. These directions are the same in FIGS.

[0035] 1 and 2, the branch portion protective structure 1 is a structure for protecting a branch portion 13 in a wire harness 10 where branch wires 12 branch off from a main trunk wire 11 formed by bundling a plurality of electric wires toward a branching direction B intersecting a first direction L1 of the main trunk wire 11. The branch portion protective structure 1 includes a tubular main tubular protective member 20 through which the main trunk wire 11 passes, and a tubular branch tubular protective member 50 through which the branch wires 12 pass.

[0036] The wire harness 10 is configured by bundling a plurality of electric wires that electrically connect electrical devices mounted on a vehicle. The main trunk 11 constituting the wire harness 10 is a bundle of insulated electric wires in which conductors are covered with an insulating coating, and electrically connects generally installed electric devices such as batteries to each other.

[0037] The branch wire 12 is a covered electric wire drawn from the main trunk 11 in a branching direction B, and is connected to, for example, electronic devices that are installed as options in the vehicle. The branched portion where the branch wire 12 is drawn from the main trunk 11 is referred to as a branch section 13.

[0038] The main trunk wire 11 is curved so as to move away from the branch wires 12 as it moves from the branch portion 13 toward Lf in the first direction L1. That is, the wire harness 10 is bifurcated at the branch portion 13 so as to have a Y shape in a plan view.

[0039] The main tubular protective member 20, through which the main trunk line 11 is inserted, is composed of a first side main tubular protective member 30 that protects the base end side Lb of the branching portion 13 in the main trunk line 11, and a second side main tubular protective member 40 that protects the tip side Lf of the branching portion 13 in the main trunk line 11.

[0040] The first-side main tubular protective member 30 is a cylindrical resin corrugated member into which the main trunk line 11 is inserted, on the base end side Lb of the branching section 13. As shown in Fig. 3, the first-side main tubular protective member 30 has a flexible bellows structure in which first main ridges 30a and first main grooves 30b are alternately arranged along the first direction L1.

[0041] As shown in Figures 2, 3(a), and 3(b), the first side main tubular protective member 30 is composed of a cylindrical first tubular body 31 and two inclined portions 32, 32 protruding in a tapered shape from the first tubular body 31 toward the tip side Lf. The first cylindrical body 31 is provided with one linear slit (not shown) extending along the first direction L1 from the end on the base end side Lb to the end on the tip end side Lf.

[0042] As shown in Figures 3(a) and 3(b), both inclined portions 32, 32 are configured in two inclined shapes that intersect both the first direction L1 and the perpendicular direction W1 perpendicular to the first direction L1 in a plan view. In detail, both inclined portions 32, 32 are formed by cutting both sides of the first cylindrical body 31 obliquely so as to move inward in the orthogonal direction W1 from the base end side Lb to the tip end side Lf of the first cylindrical body 31 in a plan view. In other words, both inclined portions 32, 32 are configured in a tapered shape that tapers inward in the orthogonal direction W1 as it moves toward the tip end side Lf above and below the first cylindrical body 31.

[0043] In both of the inclined portions 32, 32 thus formed, the first main cut surfaces 321, 321 are formed so as to face outward in the perpendicular direction W1. As shown in Fig. 3(b) , the first main cut surfaces 321, 321 are configured in a substantially semicircular arc shape of a substantially ellipse whose minor axis is along the radial direction and whose major axis is along the first direction L1 in a side view.

[0044] The second-side main tubular protective member 40 is a cylindrical resin corrugated member into which the main trunk line 11 is inserted at the tip side Lf of the branching portion 13. The second-side main tubular protective member 40 has the same diameter as the first-side main tubular protective member 30, and is configured with a flexible bellows structure in which second main ridges 40a and second main grooves 40b are alternately arranged along the second direction L2, as shown in Fig. 4 .

[0045] As shown in Figures 2, 4(a), and 4(b), the second side main tubular protective member 40 is composed of a second cylindrical body 41 and a second main inclined portion 42 that protrudes in a tapered shape from the end of the second cylindrical body 41 on the branching portion 13 side toward the branching portion 13. The second cylindrical body 41, like the first cylindrical body 31, is provided with one linear slit (not shown) extending from one end to the other end along the second direction L2.

[0046] As shown in Figures 4(a) and 4(b), the second main inclined portion 42 is configured in a one-sided inclined shape that intersects both the second direction L2 and the perpendicular direction W2 perpendicular to the second direction L2 when viewed in a plane. In detail, the second main inclined portion 42 is formed by cutting the end portion of the second cylindrical body 41 on the branching portion 13 side in a plan view obliquely from the side surface on which the branch pipe-shaped protective member 50 is arranged with respect to the branching portion 13 toward the other side surface. In other words, the second main inclined portion 42 is configured to have a tapered shape toward the branching portion 13 at the end portion of the second cylindrical body 41 on the branching portion 13 side.

[0047] In the second main inclined portion 42 thus formed, the second main cut surface 421 is formed to face the side where the branch pipe-shaped protective member 50 is disposed with respect to the branch portion 13. As shown in Fig. 4(b) , the second main cut surface 421 is configured in a substantially elliptical shape with its minor axis along the radial direction and its major axis along the second direction L2.

[0048] The branch tubular protective member 50 is a cylindrical resin corrugated member into which the branch wire 12 is inserted, and is configured similarly to the second-side main tubular protective member 40. That is, the branch tubular protective member 50 has the same diameter as the first-side main tubular protective member 30, and is configured with a flexible bellows structure in which projections and recesses are alternately arranged along the branching direction B (not shown).

[0049] The branch tubular protective member 50 is composed of a branch tubular main body 51 configured in a cylindrical shape, and a branch inclined portion 52 that protrudes in a tapered shape from the end of the branch tubular main body 51 on the branch portion 13 side (see Figure 2). The branched tubular body 51, like the first tubular body 31, is provided with one linear slit extending along the branching direction B from one end to the other end in the branching direction B (not shown).

[0050] Similar to the second main inclined portion 42, the branch inclined portion 52 is configured in a one-sided inclined shape that intersects both the branching direction B and the orthogonal direction W3 that is orthogonal to the branching direction B in a plan view. In detail, the branch inclined portion 52 is formed by cutting the end portion of the branch tubular body 51 on the branch portion 13 side obliquely from the side surface on the side where the second-side main tubular protective member 40 is arranged relative to the branch portion 13 to the other side surface. In other words, the branch inclined portion 52 is configured to have a tapered shape toward the branch portion 13 at the end portion of the branch tubular body 51 on the branch portion 13 side.

[0051] In the branch inclined portion 52 thus formed, a branch cut surface 521 is formed to face the side where the second side main tubular protective member 40 is disposed with respect to the branching portion 13. Like the second main cut surface 421, this branch cut surface 521 is configured to be a substantially elliptical shape with its minor axis along the radial direction and its major axis along the branching direction B.

[0052] Next, a method for assembling and fixing the main tubular protective member 20 and the branch tubular protective member 50 thus constructed to the branching portion 13 will be briefly described with reference to Figs. As shown in FIG. 5, the method of assembling and fixing the main tubular protective member 20 and the branch tubular protective member 50 to the branching portion 13 includes a first main trunk insertion step s1 of inserting the main trunk 11 extending to the tip side Lf into the first side main tubular protective member 30, a second main trunk insertion step s2 of inserting the main trunk 11 extending to the base end side Lb into the second side main tubular protective member 40, a branch trunk insertion step s3 of inserting the branch tubular protective member 50 into the branch trunk 12 extending in the branching direction B, and a fixing step s4 of fixing the first side main tubular protective member 30 to the branching portion 13 and fixing the second side main tubular protective member 40 and the branch tubular protective member 50 to the first side main tubular protective member 30, thereby assembling and fixing the main tubular protective member 20 and the branch tubular protective member 50 to the branching portion 13 and protecting the branching portion 13.

[0053] The details will be explained below. First, as shown in Figure 6(a), the main trunk line 11 extending from the slit in the first side main tubular protective member 30 to the tip side Lf of the branching portion 13 is inserted into the first side main tubular protective member 30 so that both inclined portions 32 are arranged in the vertical direction and face the branching portion 13 (first main trunk line insertion process s1).

[0054] The main trunk 11 extending from the slit of the second side main tubular protective member 40 to the base end side Lb of the branching portion 13 is inserted into the second side main tubular protective member 40 so that the second main inclined portion 42 faces the branching portion 13 (second main trunk insertion step s2). Similarly, the branch tubular protective member 50 is inserted into the branch wire 12 extending in the branching direction B of the branching portion 13 so that the branch inclined portion 52 faces the branching portion 13 side (branch wire insertion step s3).

[0055] In this manner, with the first side main tubular protective member 30 and the second side main tubular protective member 40 inserted into the main trunk line 11 and the branch tubular protective member 50 inserted into the branch line 12, the first side main tubular protective member 30 is moved along the first direction L1 so that both inclined portions 32 cover the branch portion 13. Then, as shown in FIG. 6(b), a tape T is wound around the tip side Lf side (both inclined portions 32) of the first side main tubular protective member 30 and the branch portion 13, and fixed with the tape. This allows the position of the first side main tubular protective member 30 with respect to the branch portion 13 and the first main cut surface 321 to be fixed so as to face a predetermined direction.

[0056] Then, the second side main tubular protective member 40 is moved along the main trunk line 11 toward the first side main tubular protective member 30 so that the second main cutting surface 421 faces one side of the first main cutting surface 321, and one side of the first main cutting surface 321 is abutted against the second main cutting surface 421 (see Figure 7(a)).

[0057] Furthermore, the branch tubular protective member 50 is moved along the branch line 12 toward the branching section 13 so that the branch cut surface 521 faces the other side of the first main cut surface 321, and the other side of the first main cut surface 321 is abutted against the branch cut surface 521 (see Figure 7(a)).

[0058] In this manner, with the second main inclined portion 42 of the second side main tubular protective member 40 and the branch inclined portion 52 of the branch tubular protective member 50 abutting against both inclined portions 32 of the first side main tubular protective member 30, the first side main tubular protective member 30, the second side main tubular protective member 40 and the branch portion 13 side of the branch tubular protective member 50 are wrapped with tape T to fix the first side main tubular protective member 30, the second side main tubular protective member 40 and the branch tubular protective member 50 with the tape (see Figure 7(b)).

[0059] This makes it possible to create a branch portion protection structure 1 in which the bifurcated branch portion 13 is covered by both inclined portions 32, the second main inclined portion 42, and the branch inclined portion 52, thereby making it possible to easily and reliably protect the branch portion 13. More specifically, the branch section protective structure 1 includes a first side main tubular protective member 30 through which the base end side Lb of the main trunk line 11 is inserted, a second side main tubular protective member 40 through which the tip end side Lf of the main trunk line 11 is inserted, and a branch tubular protective member 50 through which the branch line 12 branched off from the main trunk line 11 in the branching direction B at the branch section 13 is inserted. The first side main tubular protective member 30, the second side main tubular protective member 40, and the branch tubular protective member 50 are made of corrugated steel of the same diameter.

[0060] The second-side main tubular protective member 40 and the branch tubular protective member 50 are disposed so as to be spaced apart from each other as they move from the branch portion 13 toward the tip side Lf in the first direction L1 in correspondence with the main trunk line 11 and the branch line 12 on the tip side Lf of the branch portion 13. A second main inclined portion 42 and a branch inclined portion 52 that face the end of the tip side Lf of the first-side main tubular protective member 30 are provided at the ends of the second-side main tubular protective member 40 and the branch tubular protective member 50 on the branch portion 13 side.

[0061] In addition, at the end portion on the branching portion 13 side of the first side main tubular protective member 30, both inclined portions 32, 32 inclined on both the second side main tubular protective member 40 side and the branch tubular protective member 50 side protrude in a tapered shape toward the tip side Lf so as to face the end portions on the branching portion 13 side of the second side main tubular protective member 40 and the branch tubular protective member 50 (second main inclined portion 42 and branch inclined portion 52).

[0062] That is, the second main cut surface 421, which is the end portion of the second side main tubular protective member 40 on the branching portion 13 side, and the branch cut surface 521, which is the end portion of the branch tubular protective member 50 on the branching portion 13 side, are opposed to the first main cut surfaces 321, 321 in both inclined portions 32, 32.

[0063] The first side main tubular protective member 30, the second side main tubular protective member 40, and the branch tubular protective member 50 configured in this manner can cover the branch portion 13 with both inclined portions 32, the second main inclined portion 42, and the branch inclined portion 52, as shown in Fig. 7(b), thereby protecting the branch portion 13. Furthermore, by fixing the first side main tubular protective member 30, the second side main tubular protective member 40, and the branch tubular protective member 50 with tape T, movement of each of them relative to the branch portion 13 can be prevented, and the branch portion 13 can be protected more reliably.

[0064] In addition, by appropriately changing the cutting angles of the ends of the branch portion 13 side of both inclined portions 32, 32, the second main inclined portion 42, and the branch inclined portion 52, it is possible to appropriately change the inclination angles of the first cylindrical body 31, the second cylindrical body 41, and the branch cylindrical body 51. Therefore, various branch portions 13 can be easily protected.

[0065] Furthermore, since both inclined portions 32, 32 are inclined inward in the orthogonal direction W1 toward the tip side Lf in a plan view, the bifurcated portion of the branch portion 13 can be covered with both inclined portions 32, 32. In addition, the portion where the main trunk line 11 extends from the branching portion 13 toward the second direction L2 can be covered by the second main inclined portion 42, and the portion where the branch line 12 extends from the branching portion 13 toward the branching direction B can be covered by the branch inclined portion 52.

[0066] This makes it possible to reduce the diameter of the orthogonal cross section perpendicular to the first direction L1 of the first side main tubular protective member 30 (i.e., the length in the orthogonal direction W1) compared to when the first cylindrical body 31 covers the bifurcated portion of the branching section 13. In other words, the first side main tubular protective member 30 can be made compact.

[0067] In this way, the branch portion protection structure 1 can protect the branch portion 13 in a wire harness 10 in which a plurality of bundled electric wires are inserted into a flexible main tubular protection member 20 and a branch tubular protection member 50, where the branch wires 12 branch off from the main trunk 11 in which a plurality of electric wires are bundled, toward a branch direction B that intersects with the first direction L1 of the main trunk 11.

[0068] In detail, the branch section protection structure 1 includes a tubular main tubular protection member 20 through which the main trunk line 11 is inserted, and a tubular branch tubular protection member 50 through which the branch line 12 is inserted. The main tubular protection member 20 has a first side main tubular protection member 30 disposed on the base end side Lb in the first direction L1 from the branch section 13, and a second side main tubular protection member 40 disposed on the tip side Lf in the first direction L1 from the branch section 13. The branch tubular protection member 50 is disposed on the tip side Lf from the branch section 13, and a bifurcated branch is formed by the first side main tubular protection member 30, the second side main tubular protection member 40, and the branch tubular protection member 50. The ends of the first side main tubular protective member 30, the second side main tubular protective member 40, and the branch tubular protective member 50 on the branch section 13 side are two inclined portions 32, a second main inclined portion 42, and a branch inclined portion 52 that extend along inclined directions that intersect both the longitudinal directions (first direction L1, second direction L2, branch direction B) and the orthogonal directions W1, W2, W3 perpendicular to the longitudinal directions, and the ends of the first side main tubular protective member 30, the second side main tubular protective member 40, and the branch tubular protective member 50 on the branch section 13 side face each other.

[0069] This makes it possible to reduce gaps formed between the first-side main tubular protective member 30, the second-side main tubular protective member 40, and the branch tubular protective member 50 at the branching portion 13 where the branch line 12 branching off from the main line 11 is inclined with respect to the first direction L1 of the main line 11. Therefore, the branching portion 13 where the branch line 12 is inclined with respect to the first direction L1 can be covered with the first-side main tubular protective member 30, the second-side main tubular protective member 40, and the branch tubular protective member 50.

[0070] In this way, with a simple structure in which the ends of the first side main tubular protective member 30, the second side main tubular protective member 40, and the branch tubular protective member 50 on the branch section 13 side are inclined to form two inclined portions 32, a second main inclined portion 42, and a branch inclined portion 52, the branch section 13, which is branched so that the branch line 12 is inclined relative to the main trunk line 11, can be easily protected.

[0071] In addition, the ends of the first side main tubular protective member 30 are two inclined portions 32, 32 that protrude tapered toward the tip side Lf so as to face the respective ends of the second side main tubular protective member 40 and the branch tubular protective member 50, which are arranged so as to separate as they move away from the branch portion 13 along the first direction L1.

[0072] Thus, by adjusting the inclination angle of both inclined portions 32, 32 protruding in a tapered shape, it is possible to accommodate branch lines 12 branching off in various branching directions B from the main trunk line 11. Therefore, it is possible to more easily protect branching portions 13 where branch lines 12 branch off in various branching directions B from the main trunk line 11.

[0073] Furthermore, by forming the end of the first-side main tubular protective member 30 on the branch portion 13 side into two tapered inclined portions 32, 32, it is possible to easily arrange the two inclined portions 32, 32 in the gap formed between the second-side main tubular protective member 40 and the branch tubular protective member 50. This makes it possible to more reliably reduce the gap formed between the first-side main tubular protective member 30, the second-side main tubular protective member 40, and the branch tubular protective member 50.

[0074] Furthermore, by making the end portion on the branching portion 13 side of the first side main tubular protective member 30 into two inclined portions 32, 32, the ends on the branching portion 13 side of the second side main tubular protective member 40 and the branch tubular protective member 50 that face the two inclined portions 32, 32 can be formed so as to reduce the gap formed between the two inclined portions 32, 32.

[0075] For example, if the first-side main tubular protective member 30 does not have both inclined portions 32, and the ends of the second-side main tubular protective member 40 and the branch tubular protective member 50 on the branch section 13 side are the second main inclined portion 42 and the branch inclined portion 52, the end face on the branch section 13 side of the first-side main tubular protective member 30 will have a different shape and size from the second main cut surface 421 and the branch cut surface 521. Therefore, even if the ends of the first-side main tubular protective member 30 on the branch section 13 side are opposed to the second main inclined portion 42 and the branch inclined portion 52, gaps will be generated between the second main inclined portion 42 and the branch inclined portion 52 and the first-side main tubular protective member 30.

[0076] In contrast, if the end of the first-side main tubular protective member 30 on the branch portion 13 side is formed as both inclined portions 32, 32, the first main cut surfaces 321, 321 can be made to substantially match the shapes and sizes of the second main cut surfaces 421 and the branch cut surfaces 521. In this way, since it is easy to form both inclined portions 32, 32 to match the second main inclined portion 42 and the branch inclined portion 52, the branch portion 13 can be protected more reliably while improving the efficiency of the work of assembling the first-side main tubular protective member 30, the second-side main tubular protective member 40, and the branch tubular protective member 50.

[0077] In addition, the respective ends of the second side main tubular protective member 40 and the branch tubular protective member 50, which are arranged so as to separate as they move away from the branch portion 13 in the first direction L1, are configured with both inclined portions 32, a second main inclined portion 42 and a branch inclined portion 52 so as to face the end portion of the first side main tubular protective member 30.

[0078] As a result, by adjusting the inclination angles of the second main inclined portion 42 and the branch inclined portion 52 of the second side main tubular protective member 40 and the branch tubular protective member 50, respectively, it is possible to protect the branch portion 13 in response to the branch lines 12 branching out in branching directions B at various angles relative to the trunk line.

[0079] Furthermore, because the end portions of the first-side main tubular protective member 30, the second-side main tubular protective member 40, and the branch tubular protective member 50 on the branch section 13 side are inclined, the branch section 13 can be covered by the tip portions of both inclined portions 32, 32 and the second main inclined portion 42 and the branch inclined portion 52. This makes it possible to make each of the main tubular protective members 20 and the branch tubular protective members 50 more compact than when at least one end portion of the first-side main tubular protective member 30, the second-side main tubular protective member 40, and the branch tubular protective member 50 on the branch section 13 side is not inclined.

[0080] In addition, the first side main tubular protective member 30 and the second side main tubular protective member 40 are constructed separately, and by making at least the first side main tubular protective member 30 and the second side main tubular protective member 40 have the same diameter, the first side main tubular protective member 30 and the second side main tubular protective member 40 can be easily assembled without any gaps, and the main tubular protective member 20 can be made compact along the longitudinal direction of the main trunk line 11.

[0081] Furthermore, by making the end portion of the first side main tubular protective member 30 on the branching portion 13 side into two inclined portions 32, 32 and making the first side main tubular protective member 30 and the branch tubular protective member 50 the same diameter, it is possible to easily form the branch inclined portion 52, which is the end portion of the branch tubular protective member 50 on the branching portion 13 side, so that it matches the two inclined portions 32, 32 on the branching portion 13 side of the first side main tubular protective member 30.

[0082] Therefore, the gap between the first side main tubular protective member 30 and the branch tubular protective member 50 can be reduced, the branch tubular protective member 50 can be easily assembled to the first side main tubular protective member 30, and the branch section 13 can be reliably protected.

[0083] Furthermore, among the first-side main tubular protective member 30, the second-side main tubular protective member 40, and the branch tubular protective member 50, the first-side main tubular protective member 30 is fixed with tape to the branching portion 13, and is also fixed with tape to the second-side main tubular protective member 40 and the branch tubular protective member 50. Therefore, the first-side main tubular protective member 30 can be reliably fixed to the branching portion 13 and, with the first-side main tubular protective member 30 positioned, abutted against and fixed to the second-side main tubular protective member 40 and the branch tubular protective member 50, so that the branching portion 13 can be protected more reliably.

[0084] Moreover, the first-side main tubular protective member 30, which is fixed to the branching portion 13 with tape, is provided with both inclined portions 32, and both inclined portions 32 are fixed to the branching portion 13 with tape. This allows both inclined portions 32, which are arranged to cover the branching portion 13, to be fixed to the branching portion 13 with tape, so that the first-side main tubular protective member 30 and the branching portion 13 can be fixed to each other with tape more firmly and reliably.

[0085] Therefore, the first side main tubular protective member 30 can be firmly fixed in position relative to the branching portion 13, and the branching portion 13 can also be protected by the tape T. Furthermore, since the first side main tubular protective member 30 is positioned so that both inclined portions 32 cover the branching portion 13, it is easy to fix the tubular protective member and the branching portion 13 with tape.

[0086] In this embodiment, the first-side main tubular protective member 30 is fixed to the branching portion 13 with tape, but not limited to the first-side main tubular protective member 30, the second-side main tubular protective member 40 or the branch tubular protective member 50 may be fixed to the branching portion 13 with tape. Furthermore, any two of the first-side main tubular protective member 30, the second-side main tubular protective member 40, and the branch tubular protective member 50 may be fixed to the branching portion 13 with tape, and the remaining tubular protective member may be fixed to the tubular protective member fixed to the branching portion 13 with tape.

[0087] In the configuration of the present invention and the correspondence with the above-mentioned embodiment, The tubular protective members correspond to a main tubular protective member 20 and a branch tubular protective member 50, The wire harness is compatible with Wire Harness 10. The main line corresponds to main line 11, The axial direction corresponds to the first direction L1. The branching direction corresponds to branching direction B, The branch line corresponds to branch line 12, The branch corresponds to branch 13, The branch protection structure corresponds to the branch protection structure 1, The main tubular protective member corresponds to the main tubular protective member 20, The branch tubular protective member corresponds to the branch tubular protective member 50, The first side corresponds to the base end side Lb, The first main tubular protective member corresponds to the first main tubular protective member 30, The second side corresponds to the tip side Lf, The second main tubular protective member corresponds to the second main tubular protective member 40, The inclined end portion corresponds to both inclined portions 32, the second main inclined portion 42, and the branch inclined portion 52, The two inclined ends correspond to the two inclined portions 32, The first main trunk line insertion process corresponds to the first main trunk line insertion process s1, The second main trunk line insertion process corresponds to the second main trunk line insertion process s2, The branch trunk line insertion process corresponds to the branch line insertion process s3, The fixing step corresponds to the fixing step s4, The present invention is not limited to the configurations of the above-described embodiments, and many other embodiments can be obtained.

[0088] For example, in this embodiment, the branch section protective structure 1 electrically connects commonly installed electric devices to each other and protects a branch section 13 of a branch line 12 connected to a main line 11 and electronic devices installed as options on a vehicle. However, the present invention is not limited to this embodiment, and can be used without any particular limitation as long as it is a location where an electric wire branches, such as a branch section where a branch line connected to an optional device branches off from another branch line, or a branch section where a main line branches off from a main line connecting commonly installed electric devices. In other words, the branch section protective structure 1 can be used to protect various branch sections without being limited to the names of main lines or branch lines.

[0089] Furthermore, in this embodiment, after performing the first main trunk insertion step s1, the second main trunk insertion step s2, and the branch trunk insertion step s3, the first side main tubular protective member 30 is fixed to the branching section 13 with tape, and the second side main tubular protective member 40 and the branch trunk protective member 50 are fixed to the first side main tubular protective member 30 with tape. However, for example, after the first main trunk insertion step s1, the first side main tubular protective member 30 may be fixed to the branching section 13 with tape, and then the second main trunk insertion step s2 and the branch trunk insertion step s3 may be performed, and the second side main tubular protective member 40 and the branch trunk protective member 50 may be fixed to the first side main tubular protective member 30 with tape. Note that the names of the main trunk 11 and the branch wire 12 are for convenience, and one of the electric wires that branch into two at the branch section 13 is called the main trunk 11 and the other is called the branch wire 12, regardless of, for example, the diameter of the electric wire or the connection destination.

[0090] For example, in this embodiment, both inclined portions 32, the second main inclined portion 42, and the branch inclined portion 52 are tapered, but all of them do not necessarily have to be tapered. For example, as shown in the plan view of Fig. 8, the second side main tubular protective member 40 can be made of only the second cylindrical body 41 without the second main inclined portion 42, and the branch tubular protective member 50 can be made of only the branch cylindrical body 51 without the branch inclined portion 52 (see Fig. 8(a)).

[0091] Even in this case, by widening the inclination angle of both inclined portions 32, the branching portion 13 can be covered by both inclined portions 32 while the end faces of the base end side Lb of the second tubular body 41 and the branch tubular body 51 abut against the first main cutting surfaces 321, 321, thereby reliably protecting the branching portion 13 (see Figure 8 (b)).

[0092] 9, the first-side main tubular protective member 30 may be only the first cylindrical body 31 without both inclined portions 32, the second-side main tubular protective member 40 may be provided with the second main inclined portion 42, and the branch tubular protective member 50 may be provided with the branch inclined portion 52 (see FIG. 9(a)). This allows the branch portion 13 to be covered by the tip-side Lf end of the first cylindrical body 31, while the main trunk line 11 and the branch line 12 extending from the branch portion 13 to the tip-side Lf are protected by the second-side main tubular protective member 40 and the branch tubular protective member 50 (see FIG. 9(b)).

[0093] Furthermore, as shown in Figure 9 (c), the second main inclined portion 42 in the second side main tubular protective member 40 and the branch inclined portion 52 in the branch tubular protective member 50 may be configured as second main inclined portions 42x and branch inclined portions 52x that are inclined on both sides so that the diameter narrows radially inward as they approach the branch portion 13 in a planar view.

[0094] The second main cut surfaces 421, 421 of the second inclined portion 42x are formed on the outer side of the orthogonal direction W2. The branch cut surfaces 521, 521 of the branch inclined portion 52x are formed on the outer side of the orthogonal direction W3. One of the second main cut surface 421 and the branch cut surface 521 faces the end of the first cylindrical body 31 on the branch portion 13 side, and the other of the second main cut surface 421 faces the other of the branch cut surface 521.

[0095] This allows the branch portion 13 to be covered by the second main inclined portions 42x and the branch inclined portions 52x, thereby protecting the branch portion 13. In this case, the second main inclined portions 42x and the branch inclined portions 52x can be brought closer together compared to the second main inclined portions 42 and the branch inclined portions 52, which are inclined on one side, so that the cross-sectional area of ​​the first cylindrical body 31 can be made smaller, and the cross-sectional areas of the second cylindrical body 41 and the branch cylindrical body 51 can also be made smaller.

[0096] Furthermore, in this embodiment, the main tubular protective member 20 is composed of the first-side main tubular protective member 30 and the second-side main tubular protective member 40, but the first-side main tubular protective member 30 and the second-side main tubular protective member 40 may be integrally formed as shown in the plan view of Fig. 10. That is, as shown in Fig. 10(a), a branch tubular protective member 50 may be attached to a main tubular protective member 20y in which the first-side main tubular protective member 30 and the second-side main tubular protective member 40 in the main tubular protective member 20 are integrally formed.

[0097] Simply put, the main tubular protective member 20y is curved along the main trunk 11, and has an opening 21y cut out perpendicular to the branching direction B in a plan view at a location corresponding to the branching portion 13 (see FIG. 10(a)). Then, the branching portion 13 can be protected by abutting a branch tubular protective member 50y, which does not have a branch inclined portion 52 of the branch tubular protective member 50, against the opening 21y (see FIG. 10(b)).

[0098] 10(c), the main tubular protective member 20z may have an opening 21z cut open at an acute angle to the branching direction B in a plan view, and the branch inclined portion 52 in the branch tubular protective member 50 may have branch inclined portions 52z inclined on both sides in a plan view. This makes it possible to reduce the cross-sectional area of ​​the branch tubular protective member 50z while protecting the branch portion 13 with the main tubular protective member 20z and the branch tubular protective member 50z.

[0099] In this embodiment, the first-side main tubular protective member 30, the second-side main tubular protective member 40, and the branch tubular protective member 50 are corrugated with repeated concave and convex shapes along the longitudinal direction, but are not limited thereto and may be flexible cylindrical tubes, etc. In this case, at least one of the first-side main tubular protective member 30, the second-side main tubular protective member 40, and the branch tubular protective member 50 may be a different type from the others, for example, only the first-side main tubular protective member 30 may be corrugated and the second-side main tubular protective member 40 and the branch tubular protective member 50 may be tubes.

[0100] Furthermore, the first-side main tubular protective member 30, the second-side main tubular protective member 40, the branch tubular protective member 50, etc. may have a cross section perpendicular to the first direction L1 that is not circular but may be polygonal. In this embodiment, the inclination angles of both inclined portions 32, 32 inclined toward the tip side Lf are the same, but they do not necessarily have to be the same and may be different inclination angles.

[0101] Furthermore, in this embodiment, the first main tubular protective member 30, the second main tubular protective member 40, and the branch tubular protective member 50 have the same diameter, but they may have different outer diameters. [Explanation of symbols]

[0102] 1 Branch protection structure 10. Wire Harness 11 Main Line 12 Branch Line 13 Branch 20 Main tubular protective member 30 First side main tubular protective member 32 Both inclined sections 40 Second side main tubular protective member 42 2nd main slope 42x 2nd main ramp 50 Branch tubular protective member 52 Branch slope 52x, 52z branch slope B Branch direction s1 First main line insertion process s2 Second main line insertion process s3 Branch Line Insertion Process s4 Fixing Process L1 First Direction Lb Base End Side Lf Tip End Side

Claims

1. A branch portion protection structure for protecting a branch portion at which a branch wire is branched from a main trunk line in which the plurality of electric wires are bundled, toward a branching direction intersecting an axial direction of the main trunk line, in a wire harness in which a plurality of bundled electric wires are inserted into a tubular protective member having flexibility, A tubular main tubular protective member through which the main trunk line is inserted; a tubular branch protection member through which the branch wire is inserted; The main tubular protective member is a first main tubular protective member disposed on a first side in the axial direction from the branch portion; a second main tubular protective member disposed on a second side in the axial direction from the branch portion, the branch pipe-shaped protective member is disposed on the second side from the branch portion, a bifurcated branch is formed by the first main tubular protective member, the second main tubular protective member, and the branch tubular protective member; Any one of the first side main tubular protective member, the second side main tubular protective member, and the end portion of the branch portion side of the branch tubular protective member is An inclined end portion along an inclined direction intersecting both the longitudinal direction and an orthogonal direction perpendicular to the longitudinal direction, end portions of the first-side main tubular protective member, the second-side main tubular protective member, and the branch tubular protective member on the branch portion side face each other, The end of the first main tubular protective member is The inclined end portions protrude in a tapered manner toward the second side so as to face the respective ends of the second-side main tubular protective member and the branch tubular protective member, which are arranged so as to be spaced apart as the distance from the branch portion increases along the axial direction. Branch section protective structure.

2. The end portions of the second-side main tubular protective member and the branch tubular protective member, which are arranged to be spaced apart as they move away from the branch portion along the axial direction, are configured with the inclined end portions so as to face the end portion of the first-side main tubular protective member. The branch portion protection structure according to claim 1 .

3. The first side main tubular protective member and the second side main tubular protective member are formed separately, and at least the first side main tubular protective member and the second side main tubular protective member have the same diameter. The branch portion protection structure according to claim 1 or 2.

4. The end portion of the first-side main tubular protective member on the branch portion side is the inclined end portion, and at least the first-side main tubular protective member and the branch tubular protective member have the same diameter. The branch portion protection structure according to any one of claims 1 to 3.

5. Any one or two of the first side main tubular protective member, the second side main tubular protective member, and the branch tubular protective member are fixed to the branch portion by tape, The tubular protective member fixed to the branching portion with tape and a tubular protective member not fixed to the branching portion with tape are fixed to each other. The branch portion protection structure according to any one of claims 1 to 4.

6. The tubular protective member is provided with the inclined end portion and is fixed to the branch portion by tape, The inclined end is taped to the branch. The branch portion protection structure according to claim 5 .

7. A branch portion protection method for protecting a branch portion at which a branch wire is branched from a main trunk line in which a plurality of bundled electric wires are inserted into a flexible tubular protective member, the branch portion protection method comprising the steps of: A tubular main tubular protective member through which the main trunk line is inserted; a tubular branch protection member through which the branch wire is inserted, The main tubular protective member is a first main tubular protective member disposed on a first side in the axial direction from the branch portion; a second main tubular protective member disposed on a second side in the axial direction from the branch portion, Any one of the first side main tubular protective member, the second side main tubular protective member, and the end portion of the branch portion side of the branch tubular protective member is An inclined end portion along an inclined direction intersecting both the longitudinal direction and an orthogonal direction perpendicular to the longitudinal direction, end portions of the first-side main tubular protective member, the second-side main tubular protective member, and the branch tubular protective member on the branch portion side face each other, The end of the first main tubular protective member is the first end portion and the second end portion are inclined end portions protruding in a tapered shape toward the second side so as to face the respective ends of the second-side main tubular protective member and the branch tubular protective member, the two inclined end portions being arranged so as to be spaced apart as the distance from the branch portion increases along the axial direction; a first main trunk line insertion step of inserting the main trunk line disposed on a first side in the axial direction into the first side main tubular protective member; a second main trunk line insertion step of inserting the main trunk line disposed on a second side in the axial direction into the second side main tubular protective member; a branch wire insertion step of inserting the branch wire disposed on the second side from the branch portion into the branch pipe-shaped protective member; A fixing step is performed in which the first main tubular protective member and the branched portion are fixed with tape, and the first main tubular protective member, the second main tubular protective member, and the branch tubular protective member, which are formed with a bifurcated branch, are fixed with tape. Branch protection method.

Images