JPH117851A - Jig for mounting corrugated tube and mounting method for corrugated tube using this jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a clearance from being formed between corrugated tubes in a T-shaped branched part. SOLUTION: This jig 10 comprises a holding frame 12 having an upper opened U-shaped sectional set hole 11 extended in the axial direction, and protruding parts 11a and recessed parts 11b are alternately continuously formed on the inside surface of the set hole 11 at pitches conforming to the mountain parts 20b and valley parts 20a of a corrugated tube 20 to hold the set corrugated tube in such a manner as not to be movable. A corrugated tube to be installed onto a branch line is held by the jig 10 to hold the state where this corrugated tube is butted to a main line-side corrugated tube so as not to generate a clearance between them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for mounting a corrugated tube to be used for externally mounting a corrugated tube on a wire harness for an automobile, and a method of mounting a corrugated tube using the jig. At a portion where the harness branches in a T-shape, a corrugated tube attached to a branch line branched in the vertical direction from a trunk line side in the horizontal axis direction is attached so that no gap is generated between the corrugated tube and a corrugated tube attached to the trunk line side. .

[0002]

2. Description of the Related Art Conventionally, many wiring harnesses installed in an engine room of an automobile are provided with a corrugated tube for the purpose of protection from external members and waterproofing.
In that case, as shown in FIG.
/ H-1 and the branch line W / H-2 branches in a T-shape, the first corrugated tube 1 is connected to the main wire W-1.
FIG. 6 shows that the second corrugated tube 2 is sheathed on the branch line W-2, and the tip 2a of the second corrugated tube 2 is abutted against the first corrugated tube 1 so that the abutting portion does not come off. As shown, the tape 3 is wound by crossing.

More specifically, as shown in FIG. 7, an electric wire w is laid on a wiring jig 5 erected on a wire harness assembly drawing board 4, and a first corrugated tube 1 is connected to an electric wire W-1 on the trunk line side. Exterior. Next, the second corrugated tube 2 is sheathed on the electric wire W-2 on the branch line side, 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 connected to the electric wire W-. The second corrugated tube 2 is fixed to the electric wire W-2 by wrapping it around the tape 2 with a tape 6. Lastly, 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 lowered.
Is wound with a tape 3 to fix the first and second corrugated tubes 1 and 2.

[0004]

When the corrugated tube is sheathed on the wire harness by the above-mentioned method, the tip 2a of the second corrugated tube 2 is connected to the first corrugated tube 1.
Even if the other end 2b of the second corrugated tube 2 is fixed with the tape 6, the second corrugated tube 2 is pulled toward the other end 2b when the tape 6 is wound, and the second corrugated tube 2 In many cases, a gap is generated between the tip 2a of the second and the first corrugated tube 1.

[0005] Further, since the wiring jig 5-1 holding the wire group at the branch portion is interposed between the butting portions of the first and second corrugated tubes 1 and 2, the wiring jig 5-1 is provided. When the wiring jig 5-1 is lowered, a gap is generated in a portion where the wiring jig 5-1 was present.

[0006] As described above, if a gap is formed in the branch portion even when the corrugated tube is covered with the corrugated tube, water is flooded from the gap, and when an external member hits the gap, the electric wire is damaged. However, there is a problem that cannot be achieved, resulting in poor quality.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a jig capable of externally covering a corrugated tube at a T-shaped branch portion and a method of attaching a corrugated tube using the jig. The challenge is to do.

[0008]

In order to solve the above-mentioned problems, the present invention is characterized in that, according to the present invention, there is provided a holding frame penetrating in the axial direction a set hole having a U-shaped cross section having an open upper surface, At least on the bottom inner peripheral surface, the projections and the depressions are alternately and continuously formed at a pitch matching the peaks and valleys of the corrugated tube to be inserted and set, and the set corrugated tube is immovably held. A jig for mounting a corrugated tube having a configuration is provided.

A convex portion and a concave portion which are continuous with the bottom are also formed on the inner peripheral surfaces on both sides of the set hole, and the holding frame provided with the set hole is removably mounted on a drawing board for assembling a wire harness. It is fixed to the upper end of the rod (claim 2).

Further, the present invention provides a method for attaching a corrugated tube to a wire harness using the jig according to claim 1 or 2. That is, at the portion where the wire harness branches in a T shape,
A corrugated tube which branches off in a direction perpendicular to the wire harness in the straight direction and is provided on the wire harness which is in the direction of the vertical axis of the T-shape is inserted into a set hole of the jig. In a state where the corrugated tube is placed against the corrugated tube to be sheathed on the wire harness in the horizontal axis direction of the U-shape, the corrugated tube is immovably held in the set hole, and in this state, the side opposite to the branch side of the corrugated tube. The tip is fixed to a wire harness by tape winding, and then, at the branch side, a joint portion between the corrugated tube sheathed on the wire harness in the horizontal axis direction and the corrugated tube held by a jig is joined by tape winding. A method for mounting a corrugated tube using a jig is provided.

In the contracted state, the end of the corrugated tube held by the jig is abutted against the corrugated tube for wire harness exterior in the horizontal axis direction, and the wiring of the T-shaped branch portion of the wire harness is wired. It is preferable that when the jig is lowered, the contracted portion is extended to cover the gap between the corrugated tube joints caused by the lowering of the support portion (claim 4).

As mentioned above, claim 1 or claim 2
When the jig described in (1) is used, the peak of the corrugated tube fits into the concave portion of the set hole of the jig, and the valley portion fits into the convex portion, and is held immovably. 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 set on the jig, the other end of the set corrugated tube is wound with a tape. When fixed, the abutting state can be maintained. Therefore, it is possible to eliminate the generation of a gap in the abutting portion.

[0013] Further, as described in claim 4,
If the corrugated tube is contracted at the abutting part, when the wiring jig at the branch part is lowered, the corrugated tube is extended so as to cover the part occupied by the jig, and the generation of the gap is ensured. Can be prevented. Further, the corrugated tube can be held by the jig of claim 1 or 2 in a state where the tip on the side of the abutting portion is contracted.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a jig 10 for mounting a corrugated tube according to the present invention comprises a holding frame 1 having a U-shaped cross-section set hole 11 having an open upper surface and penetrating in the axial direction.
2 is fixed to the upper end surface of the rod 13. The set hole 11 extends from the inner surface of the bottom to the inner surface of the inner surface of both sides.
1a and the concave portion 11b are formed alternately and continuously in the penetrating direction.

The pitch between the convex portion 11a and the concave portion 11b is
Valley 20 of corrugated tube 20 to be inserted and set
a and the pitch corresponding to the peak 20b. In addition, the convex part 11a and the concave part 11b formed in the inner surface of the set hole 11 need to be provided at least on the inner surface of the bottom part, but need not be provided on the inner surface of both sides. When the corrugated tube 20 is not provided on the inner surfaces of both sides, the corrugated tube 20 can be positioned and held by the convex portion 11a and the concave portion 11b only on the bottom side of the set hole 11. In addition, it is not necessary to provide a concave portion and a convex portion over the entire length direction through which the setting hole 11 has penetrated, and it is sufficient to provide only a part of the concave portion and the convex portion. In this case, at least three convex portions and the concave portion are formed. If they are provided continuously, they can be reliably positioned and held.

As shown in FIG. 2, the size of the set hole 11 is preferably set to a size that allows a large-diameter corrugated tube 20 (shown by a solid line in the figure) to be inserted. In this case, even if a small-diameter corrugated tube 20 '(shown by a dotted line in the figure) is inserted, if the pitch between the peaks and the valleys is the same as that of the large-diameter corrugated tube, a part of the small-diameter corrugated tube 20' is removed. The positioning and holding can be performed by fitting into the convex portion 11a and the concave portion 11b of the set hole 11, and can be used commonly.

The rod 1 having the holding frame 12 fixed to the upper end
A stopper 14 protrudes from a lower portion of the rod 3, and a screw 13a is formed on the outer peripheral surface of the rod 13 below the stopper 14. Therefore, the base 15 for assembling the wire harness is provided.
The lower part of the rod 13 is inserted into the hole of
In the state where the jig 10 is locked on the base 5 and tightened with a nut (not shown) from below the base 15, the jig 10
Can easily be erected on the table 15.

The jig 10 for a corrugated tube having the above structure.
Is, as shown in FIG. 3, a table 15 for assembling the wire harness.
Above, it is attached to a position where a branch line W-2 branched in a T-shape from the main line W-1 of the wire harness is wired.

On the main line W-1 side, a Y-shaped wiring jig 16 is arranged in a straight portion, and a three-pronged wiring jig 17 is arranged at the T-shaped branch position X. doing. Similarly, the wiring jig 18 is arranged at the branch position on the branch line W-2 side.

After the electric wires are wired while being held by the wiring jigs 16 to 18, the first corrugated tube 3 is connected to the trunk line W-1.
Fit 0 outside. The first corrugated tube 30 has a slit and is attached to the wire group from the side. The branch position X has an opening 30a, and the branch line W-2 is drawn out.

Next, the second corrugated tube 20 is fitted around the branch line W-2. The second corrugated tube 20 is also attached to the wire group from the side with a slit. With the distal end 20c of the second corrugated tube 20 abutting against the first corrugated tube 30, it is inserted into the jig 10 for corrugated tube, and the valley 20
a, the peak 20b is made to coincide with the recess 10b. In this state, the second corrugated tube 20 is positioned and held by the jig for corrugated tube 10 and cannot be moved.
Therefore, the tip 20c is the first corrugated tube 30
Can be maintained.

As shown in FIG. 4, at the abutting portion, the distal end 20c of the second corrugated tube 20 is
A portion 20d in which the pitch between the valley portion 20a and the peak portion 20b is reduced is formed.

In the above state, 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. When the tape 6 is wound, the second corrugated tube 20 is connected to the other end 20.
Even if it is pulled as shown by an arrow on the side e, the second corrugated tube 20 does not move because the jig 10 is positioned and held by the corrugated tube jig 10, and the state in which the distal end 20 c abuts the first corrugated tube 30. Can be held and does not create gaps.

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 distal end 20c is extended to cover the gap generated in the portion where the shaft portion of the wiring jig 17 was present. afterwards,
The first corrugated tube 30 and the second corrugated tube 20 are wrapped and fixed with a tape 3 using a tape.

As described above, the second corrugated tube 2
Since the state in which the leading end 20c of the “0” abuts against the first corrugated tube 30 can be held by the jig 10 for corrugated tube, it is possible to prevent the occurrence of a gap 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.

At the branch position X, the wiring jig 1
7, the first corrugated tube 30 and the second corrugated tube 20 can be moved even if the wiring jig 17 is lowered.
When no gap is generated between the second corrugated tube 20 and the second corrugated tube 20, it is not necessary to provide the contracted portion 20e at the distal end 20c of the second corrugated tube 20.

[0028]

As is apparent from the above description, according to the present invention, the corrugated tube is positioned and held so as not to move when the tape is wound. Can be held. Therefore, it is possible to prevent a gap from being generated at the butted portion of the corrugated tube, and it is possible to improve the quality of the formed wire harness.

Further, the worker who attaches the corrugated tube does not need to wind the tape while checking whether 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 an attached state of a corrugated tube to a wire harness using the jig.

FIG. 4 is a schematic diagram showing a wiring state of a wire harness that covers a corrugated tube.

FIG. 5 is a schematic view showing a mounting state of a corrugated tube at a T-shaped branch position.

FIG. 6 is a partially enlarged view of FIG. 5;

FIG. 7 is a perspective view showing a method of attaching a corrugated tube to a conventional T-shaped branched wire harness.

[Explanation of symbols]

 3, 6 tape 10 jig for corrugated tube 11 set hole 11a convex portion 11b concave portion 12 holding frame 13 rod 20 (second) corrugated tube 20a valley portion 20b crest portion 20c tip end 20d contracted portion 17 wiring jig 30 first One corrugated tube

Claims (4)

[Claims] 1. A corrugated tube having a U-shaped cross section having a U-shaped cross section with an open upper surface and having a holding frame extending in an axial direction thereof. A jig for mounting a corrugated tube, characterized in that a convex portion and a concave portion are formed alternately and continuously at a pitch corresponding to the portion, and the set corrugated tube is held immovably. 2. A convex portion and a concave portion which are continuous with the bottom are also formed on the inner peripheral surfaces on both sides of the set hole, and the holding frame provided with the set hole is detachable on a wiring harness assembly drawing board. The jig for mounting a corrugated tube according to claim 1, wherein the jig is fixed to an upper end of a rod to be mounted on the corrugated tube. 3. A method for attaching a corrugated tube to a wire harness using the jig according to claim 1 or 2, wherein the wire harness is connected to a wire harness in a linear direction at a portion where the wire harness branches in a T-shape. On the other hand, a corrugated tube which is branched in a direction perpendicular to the T-shape and which is covered with a wire harness which is the longitudinal direction of the T-shape is inserted into a set hole of the jig, and the tip of the corrugated tube is inserted in the horizontal direction of the T-shape. With the corrugated tube abutting from the side direction against the corrugated tube to be packaged on the wire harness, the corrugated tube is immovably held in the set hole, and in this state, the tip of the corrugated tube opposite to the branch side is taped to the wire harness. Winding and fixing, and then, on the branch side, a corrugated tube sheathed on the wire harness in the horizontal axis direction, A method of attaching a corrugated tube using a jig in which a joint portion with a corrugated tube held by a jig is joined by tape winding. 4. A front end of the corrugated tube held by the jig is abutted against the corrugated tube for wire harness exterior in the horizontal axis direction in a contracted state, and a T-shaped branch portion of the wire harness is formed. 4. The system according to claim 3, wherein when the wiring jig is lowered, the contracted portion is extended to cover a gap between the corrugated tube joints caused by the lowering of the support portion.
A method for mounting a corrugated tube using the jig described in 1.