JP3718960B2 - Corrugated tube mounting jig and corrugated tube mounting method using the jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a corrugated tube mounting jig used when a corrugated tube is mounted on an automotive wire harness, and a corrugated tube mounting method using the jig, and in particular, the wire harness branches in a T-shape. In this portion, the corrugated tube attached to the branch line branched in the vertical axis direction from the main line side in the horizontal axis direction is attached so that no gap is generated between the corrugated tube attached to the main line side.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, many wire harnesses arranged in an engine room of an automobile have a corrugated tube externally mounted for the purpose of protection from external members or waterproofing. In that case, as shown in FIG. 5, in the part where the branch line W-2 branches from the trunk line W-1 of the wire harness to the T shape, the first corrugated tube 1 is sheathed on the trunk line electric wire W-1. As shown in FIG. 6, the second corrugated tube 2 is sheathed on the branch line W-2, the tip 2a of the second corrugated tube 2 is abutted against the first corrugated tube 1, and the abutting portion is not detached. Tape 3 is wrapped around with a stick.
[0003]
In detail, as shown in FIG. 7, the electric wire w is wired to the wiring jig 5 erected on the wire harness assembly drawing board, and the first corrugated tube 1 is sheathed on the electric wire W-1 on the main line side. Then, the second corrugated tube 2 is sheathed on the branch-side electric wire W-2, the tip 2a of the second corrugated tube 2 is held so as to abut against the first corrugated tube 1, and the other end 2b is held on the electric wire W-. 2 is wound with a tape 6 to fix the second corrugated tube 2 to the electric wire W-2. Finally, the wiring jig 5-1 at the T-shaped branch portion is lowered, and the joint X between the first and second corrugated tubes 1 and 2 is wound with the tape 3, and the first and second corrugated tubes 1 and 2 are fixed.
[0004]
[Problems to be solved by the invention]
When the corrugated tube is externally mounted on the wire harness by the above method, the other end 2b of the second corrugated tube 2 is fixed with the tape 6 with the tip 2a of the second corrugated tube 2 abutted against the first corrugated tube 1. In many cases, the second corrugated tube 2 is pulled toward the other end 2 b when the tape 6 is wound, and a gap is generated between the tip 2 a of the second corrugated tube 2 and the first corrugated tube 1.
[0005]
Moreover, since the wiring jig 5-1 holding the electric wire group at the branch portion is interposed in the abutting portion of the first and second corrugated tubes 1 and 2, the wiring jig 5-1 is lowered. Then, a gap is generated in the portion where the wiring jig 5-1 was present.
[0006]
As described above, even if the corrugated tube is used, if a gap is generated at the branch portion, water is submerged from the gap, and if an outer member hits the gap, the wire is damaged, and thus reliable protection cannot be achieved. There is a problem, resulting in poor quality.
[0007]
The present invention has been made in view of the above problems, and provides a jig in which a corrugated tube can be packaged without a gap at a T-shaped branch portion, and a corrugated tube mounting method using the jig. It is an issue.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a holding frame that penetrates a set hole having a U-shaped cross section having an open top surface in the axial direction, and is inserted into at least the bottom inner peripheral surface of the set hole. The corrugated tube has a configuration in which convex portions and concave portions are alternately and continuously formed at a pitch that matches the peak and valley portions of the corrugated tube to be set, and the set corrugated tube is held immovably. Jigs for tube mounting are provided.
[0009]
The upper end of a rod that has a convex portion and a concave portion that are continuous with the bottom portion on both inner peripheral surfaces of the set hole, and that attaches the holding frame having the set hole to the wire harness assembly drawing board in a detachable manner. (Claim 2).
[0010]
Moreover, this invention provides the method of attaching a corrugated tube to a wire harness using the jig | tool of Claim 1 or Claim 2 in Claim 3. That is, in the portion where the wire harness branches in a T-shape, the corrugated tube that branches in a direction orthogonal to the wire harness in the linear direction and is sheathed on the wire harness that is in the vertical direction of the T-shape is set in the jig. Insert the hole into the hole and hold the corrugated tube immovably in the set hole with the tip of the corrugated tube abutting from the side against the corrugated tube that covers the T-shaped wire harness in the horizontal axis direction. In this state, the tip of the corrugated tube opposite to the branch side is taped and fixed to the wire harness, and then, on the branch side, the corrugated tube sheathed on the wire harness in the horizontal axis direction and the corrug held by a jig mounting of the corrugated tube that the junction between the tube using a jig attached in-out tape winding It has to offer.
[0011]
With the tip of the corrugated tube held by the jig contracted against the corrugated tube for the exterior of the wire harness in the horizontal axis direction, the wiring jig for the T-shaped branch portion of the wire harness is When lowered, it is preferable to extend the contracted portion to cover the gap of the corrugated tube joint formed by the lowering of the wiring jig (claim 4).
[0012]
As described above, when the jig described in claim 1 or 2 is used, the crest portion of the corrugated tube fits into the concave portion of the set hole of the jig, and the trough portion fits into the convex portion, thereby making the movement impossible. Retained. Therefore, when the tip of the corrugated tube on the branch side (vertical axis side) is abutted against the corrugated tube on the main line side (horizontal axis side) and is set on the jig, the other end of the corrugated tube is wound on the tape. When fixed, the abutting state can be maintained. Therefore, it is possible to eliminate the occurrence of a gap in the abutting portion.
[0013]
Further, as described in claim 4, when the corrugated tube is contracted at the abutting portion, the portion occupied by the jig is covered when the wiring jig at the branch portion is lowered. Thus, the corrugated tube can be extended to reliably prevent the generation of a gap. Further, the corrugated tube can be held by the jig according to claim 1 or 2 with the tip on the abutting portion side being contracted.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
As shown in FIG. 1, a corrugated tube mounting jig 10 according to the present invention fixes a holding frame 12 passing through a set hole 11 having a U-shaped cross section with an open top surface in the axial direction to the upper end surface of a rod 13. are doing. The set hole 11 is formed with convex portions 11a and concave portions 11b alternately and continuously in the penetrating direction from the inner surface of the bottom portion to the inner peripheral surface of both side portions.
[0016]
The pitch of the convex part 11a and the concave part 11b is set to a pitch that coincides with the valley part 20a and the peak part 20b of the corrugated tube 20 to be inserted and set. In addition, although it is necessary to provide the convex part 11a and the recessed part 11b formed in the inner surface of the set hole 11 at least on the inner surface of the bottom surface part, it does not need to be provided on the inner surface of both side parts. When the corrugated tube 20 is not provided on the inner surfaces of both side portions, the corrugated tube 20 can be positioned and held only by the convex portion 11a and the concave portion 11b on the bottom side of the set hole 11. Moreover, it is not necessary to provide a recessed part and a convex part over the whole length direction which the set hole 11 penetrated, and what is necessary is to provide only in one part. In that case, at least 3 convex part and a recessed part are provided. If they are provided continuously, positioning can be reliably maintained.
[0017]
Moreover, it is preferable that the size of the set hole 11 is set so that a large-diameter corrugated tube 20 (shown by a solid line in the figure) can be inserted as shown in FIG. In this case, even if a small-diameter corrugated tube 20 ′ (shown by a dotted line in the drawing) is inserted, if the pitch between the peak and the valley is the same as that of the large-diameter corrugated tube, a part of the small-diameter corrugated tube 20 ′ is used. It can be positioned and held by fitting into the convex portion 11a and the concave portion 11b of the set hole 11, and can be used in common.
[0018]
A stopper 14 protrudes from the lower portion of the rod 13 with the holding frame 12 fixed to the upper end, and a screw 13 a is formed on the outer peripheral surface of the rod 13 below the stopper 14. Therefore, when the lower portion of the rod 13 is inserted into the hole of the base 15 for assembling the wire harness and the stopper 14 is locked on the base 15, the corrugated tube is tightened with a nut (not shown) from below the base 15. The jig 10 can be easily erected on the table 15.
[0019]
As shown in FIG. 3, the corrugated tube jig 10 having the above-described configuration is provided with a branch line W- 2 that branches in a T shape from the trunk line W- 1 of the wire harness on the base 15 for assembling the wire harness. Attach to position.
[0020]
On the main line W-1 side, a Y-shaped wiring jig 16 is arranged at the straight line portion, and a three-furnace-shaped wiring jig 17 is arranged at the T-shaped branch position X. . Similarly, the wiring jig 18 is also arranged at the branch position on the branch line W-2 side.
[0021]
The first corrugated tube 30 is externally fitted to the trunk line W-1 after the wires are wired by being held by the wiring jigs 16 to 18. The first corrugated tube 30 has a slit and is attached to the electric wire group from the side. Further, the branch position X has an opening 30a, and the branch line W-2 is drawn out.
[0022]
Next, the second corrugated tube 20 is externally fitted to the branch line W-2. The second corrugated tube 20 is also attached to the electric wire group from the side with a slit. With the tip 20c of the second corrugated tube 20 abutting against the first corrugated tube 30, the corrugated tube is inserted into the jig 10 for corrugated tube, and the valley 20a coincides with the convex portion 10a, and the peak portion 20b coincides with the concave portion 10b. Let In this state, the second corrugated tube 20 is positioned and held by the corrugated tube jig 10 so that the second corrugated tube 20 cannot move. Therefore, the state in which the tip 20c abuts against the first corrugated tube 30 can be maintained.
[0023]
And as shown in FIG. 4, in the abutting part, the part 20d which reduced the pitch of the trough part 20a and the peak part 20b in the front-end | tip 20c of the 2nd corrugated tube 20 is formed.
[0024]
In the state described above, the tape 6 is wound around the other end 20e of the second corrugated tube 20, and the second corrugated tube 20 and the branch line W-2 are fixed. Even when the second corrugated tube 20 is pulled as indicated by an arrow toward the other end 20e when the tape 6 is wound, the second corrugated tube 20 does not move because the corrugated tube jig 10 is positioned and held. The tip 20c can be held in contact with the first corrugated tube 30, and no gap is generated.
[0025]
Next, the wiring jig 17 at the T-shaped branch position X is lowered through the mounting hole of the base 15. Next, on the second corrugated tube 20 side, the contracted portion 20d provided at the tip 20c is extended to cover the gap generated in the portion where the shaft portion of the wiring jig 17 was present. Then, the 1st corrugated tube 30 and the 2nd corrugated tube 20 are wound around the tape 3 and fixed.
[0026]
As described above, since the state where the tip 20c of the second corrugated tube 20 is abutted against the first corrugated tube 30 can be held by the corrugated tube jig 10, it is possible to prevent a gap from being generated at the branch position. In addition, it is possible to eliminate a gap generated when the wiring jig 17 at the branch position is lowered.
[0027]
In the branch position X, when the wiring jig 17 is lowered due to the structure of the wiring jig 17, no gap is generated between the first corrugated tube 30 and the second corrugated tube 20. Need not be provided with a contracted portion 20 e at the tip 20 c of the second corrugated tube 20.
[0028]
【The invention's effect】
As is clear from the above description, according to the present invention, the corrugated tube is positioned and held so that it does not move when winding the tape. Therefore, the corrugated tube can be held in the butted state at the T-shaped branch position. Therefore, it can prevent that a clearance gap generate | occur | produces in the butt | matching part of this corrugated tube, and can improve the quality of the formed wire harness.
[0029]
In addition, the operator who installs the corrugated tube does not need to wind the tape while checking whether or not the butted state can be maintained, and the workability can be improved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a jig according to an embodiment of the present invention.
FIG. 2 is a schematic view showing the size of a jig.
FIG. 3 is a perspective view showing a state in which the corrugated tube is attached to the wire harness using the jig.
FIG. 4 is a schematic view showing a wiring state of a wire harness that covers a corrugated tube.
FIG. 5 is a schematic view showing a mounting state of the corrugated tube at a T-shaped branch position.
6 is a partially enlarged view of FIG. 5;
FIG. 7 is a perspective view showing a conventional method for attaching a corrugated tube to a wire harness branched in a T shape.
[Explanation of symbols]
3, 6 Tape 10 Corrugated tube jig 11 Set hole 11a Convex part 11b Concave part 12 Holding frame 13 Rod 20 (Second) Corrugated tube 20a Valley part 20b Peak part 20c Tip part 20d Shrinked part 17 Wiring jig 30 One corrugated tube

Claims (4)

  A holding frame penetrating in the axial direction through a set hole having a U-shaped cross section with an open top surface, and a pitch matching the peak and valley of the corrugated tube to be inserted and set on at least the bottom inner peripheral surface of the set hole A jig for attaching a corrugated tube, wherein convex portions and concave portions are alternately and continuously formed and the set corrugated tube is held unmovable.   The upper end of the rod which forms the convex part and recessed part which continued with the bottom part also on the inner peripheral surface of the both sides of the said set hole, and attaches the said holding frame provided with this set hole on the wire harness assembly drawing board removably The jig | tool for corrugated tube attachment of Claim 1 currently fixed to. A method for attaching a corrugated tube to a wire harness using the jig according to claim 1 or 2,
At the part where the wire harness branches in a T shape, the corrugated tube that branches in a direction perpendicular to the wire harness in the straight direction and is mounted on the wire harness that becomes the longitudinal direction of the T shape is used as the set hole of the jig. Inserting the tip of the corrugated tube against the corrugated tube sheathed on the wire harness in the T-shaped horizontal axis direction from the side, holding the corrugated tube immovably in the set hole, In this state, the tip of the corrugated tube opposite to the branch side is taped and fixed to the wire harness, and then, on the branch side, the corrugated tube sheathed on the horizontal wire harness and the corrugated tube held by the jig mounting of the corrugated tube using the jig attached in-out tape winding joining portion. With the tip of the corrugated tube held by the jig contracted against the corrugated tube for the exterior of the wire harness in the horizontal axis direction, the wiring jig for the T-shaped branch portion of the wire harness is The method for attaching a corrugated tube using the jig according to claim 3, wherein, when lowered, the contracted portion is stretched to cover a gap in the corrugated tube joining portion generated by the lowering of the wiring jig .

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