JP3252589B2 - Corrugated tube mounting jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig used for covering a bundle of electric wires with a corrugated tube when manufacturing a wire harness.

[0002]

2. Description of the Related Art A wire harness used in an engine room or the like has a structure in which a predetermined portion of a wire bundle is covered with a corrugated tube. Conventionally, when manufacturing such a wire harness, the work of covering the wire bundle with the corrugated tube has been performed manually by an operator, but the work efficiency is poor, and when working for a long time, hands are required. There was also a risk of damage.

[0003] Various jigs have been studied to make the work easy, and the applicant of the present invention has invented a jig 9 shown in FIG. The jig 9 shown in the drawing has a shape obtained by bending a single plate material into a substantially U-shape, and the upper sides of two substantially parallel side portions 92, 92 sandwiching the U-shaped bottom portion 91, are connected to the U-shaped bottom portion 91. Formed in an inclined shape with respect to
The edges of the sides are bent outward to form flange edges 93, 93.

In order to cover a wire bundle with a corrugated tube using the jig 9, first, FIG. 4B and FIG.
As shown in the figure, the wire bundle W is applied to the U-shaped bottom 91, and the flange edges 93, 93 are inserted into the tube from the slit C1 of the corrugated tube C, and the flange edges 93, 93 are inserted into the slit C1. Engage the ends C2 and C2 of the corrugated tube C on both sides.

Next, the corrugated tube C is sent out in the direction of the wire bundle W as shown by a black arrow in FIG. Then, while the corrugated tube C is guided in the direction of the wire bundle W by the engagement of the ends C2 and C2 and the flange edges 93 and 93, the slit C1 is expanded by the flange edges 93 and 93 and the wire bundle W Then, the slit C1 is closed by its own elasticity to cover the wire bundle W (FIG. 5 (b)).

Thereafter, when the corrugated tube C is continuously fed in the direction indicated by the black arrow in FIG.
Can be efficiently covered with the corrugated tube C over a predetermined length. The jig has an advantage that the structure is simple and the work of covering the wire bundle with the corrugated tube can be easily performed.

[0007]

However, the above jig is
For example, when there is not enough space between the inner diameter of the corrugated tube and the outer diameter of the wire bundle, or when the outer diameter of the wire bundle is larger than the inner diameter of the corrugated tube, the slit opens, so-called puncture It has been clarified in subsequent studies that the following problems occur when used.

That is, in the vicinity of the base end of the jig 9, both flange edges 93, 93 are, as shown in FIG.
2 and 92 are deformed to be close to each other, but near the front end of the jig 9, as shown in FIG.
The gap is greatly expanded by the. For this reason, the corrugated tube C having the above-described relationship with the wire bundle W
As shown in the figure, the slit C1 is unnecessarily widened near the tip of the jig 9 so that the end C
2, C2, as shown by the white arrow in the figure, flange edge 93,
93 easily comes off. Then, as shown in FIG. 6B, the wire bundle W is detached from the jig 9 in front of the wire bundle W.
There is a problem that it becomes impossible to cover the surface.

Even if there is a sufficient gap between the inner diameter of the corrugated tube and the outer diameter of the wire bundle, for example, swelling due to a seam or branching (splice) in the middle of the wire bundle, or a waterproof pad treatment at the splice portion. In the case where there is a bump-like bulge subjected to the above, the above-mentioned problem similarly occurs in the bulge portion. Further, the above-mentioned problem frequently occurs particularly in a small-diameter corrugated tube having an inner diameter of about 10 mmφ or less. This is because the same jig 9 is used irrespective of the diameter of the corrugated tube C, so that the smaller the diameter, the larger the flange edges 93, 93. How to open slit C1
It is considered that the cause is that the ends C2 and C2 are easily detached from the flange edges 93 and 93 as the diameter becomes larger than the diameter of the corrugated tube C.

It is conceivable to prepare a dedicated jig having a small flange edge width for a small-diameter corrugated tube. In this case, however, it is necessary for an operator to select a jig according to the diameter of the corrugated tube. There is a problem that workability is poor. The present invention has been made based on such background art, and does not cause a problem that the corrugated tube comes off the jig before the wire bundle and cannot cover the wire bundle. An object of the present invention is to provide a corrugated tube mounting jig capable of covering a corrugated tube with good workability.

[0011]

According to the first aspect of the present invention,
In order to cover the wire bundle with a corrugated tube having a slit that can be expanded in the axial direction, the plate has a shape in which one sheet material is bent into a substantially U-shape, and the U-shaped bottom portion serves as a guide portion of the wire bundle. At the same time, the upper sides of two substantially parallel sides sandwiching the bottom of the U-shape are formed so as to be inclined with respect to the bottom of the U-shape, and the edges of the two sides are bent outward to form a corrugated tube. In a corrugated tube mounting jig having a flange edge for guiding the wire bundle guided to the U-shaped bottom while expanding the slit of the flange edge,
The end of the jig on the distal end side is formed in a shape in which the flange edge is cut so as to be higher than the wire bundle guided by the U-shaped bottom.

[0012]

The jig for mounting a corrugated tube of the present invention cuts the flange edge so that the end of the flange edge on the tip side of the jig is higher than the wire bundle guided by the U-shaped bottom. Since the corrugated tube is formed in the shape described above, the corrugated tube is not greatly expanded at the distal end portion of the jig as in the related art.

[0013] Therefore, according to the corrugated tube mounting jig of the present invention, the corrugated tube is prevented from coming off from the jig in front of the wire bundle, and the corrugated tubes of various sizes can be operated with one jig. It is possible to coat the wire bundle well and reliably.

[0014]

An embodiment of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1 (a), the corrugated tube mounting jig 1 of this embodiment has a shape obtained by bending a single plate material into a substantially U-shape. A guide portion of the wire bundle W indicated by a two-dot chain line in the figure is formed, and upper sides of substantially parallel side portions 12, 12 sandwiching the U-shaped bottom portion 11 are formed to be inclined with respect to the U-shaped bottom portion 11, The two edges are bent outward to form flange edges 13.

The flange edges 13, 13 are for guiding the wire bundle W guided by the U-shaped bottom 11 so as to cover the wire bundle W guided by the U-shaped bottom 11 while expanding the slit C1 of the corrugated tube C. Side ends 13a, 13a
The jig 1 is formed in a shape in which the tip 1a side is cut so as to be higher than the wire bundle W guided by the bottom 11 of the character.

In FIG. 1, reference numeral 12a denotes a hole formed in the side portion 12. When the electric wire bundle W is covered with the corrugated tube C, an operator inserts a finger to insert the jig 1 into the hole. It is for holding. In order to cover the wire bundle W with the corrugated tube using the corrugated tube mounting jig 1 of this embodiment composed of the above-mentioned respective parts, first, as shown in FIGS. The wire bundle W is applied to the bottom 11 of the character,
13 is inserted into the tube from the slit C1 of the corrugated tube C, and the flange edges 13 and 13 are connected to the ends C2 and C of the corrugated tube C on both sides of the slit C1.
2 is engaged.

Next, the corrugated tube C is sent out in the direction of the wire bundle W as shown by a black arrow in FIG. Then, the corrugated tube C is guided in the direction of the wire bundle W by engagement of the ends C2 and C2 and the flange edges 13 and 13, and the slit C1 is expanded by the flange edges 13 and 13 so that the wire bundle W After that, the slit C1 is closed by its own elasticity to cover the wire bundle W [FIG. 2 (b)].

As described above, the flange edges 13, 13 are so positioned that the ends 13 a, 13 a on the tip 1 a side of the jig 1 are positioned higher than the wire bundle W guided by the U-shaped bottom 11. Since the end 1a of the jig 1 is cut, the corrugated tube C is covered with the wire bundle W without being greatly expanded at the end of the jig 1 as shown in FIG. For this reason, the corrugated tube C is prevented from coming off the jig 1 in front of the wire bundle W, and as a result, the corrugated tubes C of various sizes are formed.
Can be covered with a single jig 1 on the wire bundle W with good workability.

The ends 13a of the flange edges 13, 13
The position of 13a is not limited to the embodiment shown in FIG. 1 (a).
Corrugated tube C is jig 1
It can be set to any position above or below the above-mentioned position without departing from the range. In short, flange edge 1
It suffices that the ends 13a, 13a of the wires 3 and 13 are located higher than the wire bundle W guided by the U-shaped bottom portion 11.

In addition, the present invention can be variously modified within the scope of the claims without being limited to the description of the embodiments.

[0021]

In the corrugated tube mounting jig according to the present invention, the flange edge is formed between the insertion end of the corrugated tube and the front of the jig, and the front end side is cut away. This prevents the corrugated tube from coming off the jig before the wire bundle.

Therefore, according to the present invention, various sizes of corrugated tubes can be covered with a single jig with good workability and surely on the wire bundle.

[Brief description of the drawings]

FIG. 1 (a) is a perspective view showing an embodiment of a corrugated tube mounting jig of the present invention, and FIG. 1 (b) is an electric wire bundle using the corrugated tube mounting jig of the above embodiment. It is a perspective view which shows one process of the operation | work which coat | covers with a corrugated tube.

FIG. 2 (a) is a cross-sectional view of the process of FIG. 1 (b), and FIG. 2 (b) is a diagram showing a wire bundle covered with a corrugated tube using the corrugated tube mounting jig of the above embodiment. It is a perspective view which shows the next process of the operation | work which performs.

FIG. 3 is a cross-sectional view of the step of FIG. 2 (b).

FIG. 4 (a) is a perspective view showing a conventional jig, and FIG.
(b) is a perspective view showing one process of covering the electric wire bundle with the corrugated tube using the above-mentioned conventional jig.

FIG. 5 (a) is a cross-sectional view of the step of FIG. 4 (b), and FIG. 5 (b) is a view following the operation of covering a wire bundle with a corrugated tube using the conventional jig. It is a perspective view showing a process.

6 (a) is a cross-sectional view of the step of FIG. 5 (b), and FIG. 6 (b) is a problem that occurs in the above-mentioned conventional jig; FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Corrugated tube mounting jig 1a Tip 11 Bottom (guide part) 12 Side 13 Flange edge 13a End

Claims (1)

(57) [Claims] 1. A sheet material having a substantially U-shaped curved shape in order to cover a corrugated tube having a slit capable of being opened in an axial direction on a wire bundle, and a U-shaped bottom portion formed by an electric wire. The upper side of the two substantially parallel sides sandwiching the bottom of the U-shape is formed to be inclined with respect to the bottom of the U-shape, and the edges of the two sides are bent outward. In the corrugated tube mounting jig having a flange edge for guiding the wire bundle guided on the U-shaped bottom while expanding the slit of the corrugated tube, the flange edge is located at the tip side of the jig. A corrugated tube mounting jig formed by cutting the flange edge so that the end of the corrugated tube is positioned higher than the wire bundle guided by the U-shaped bottom.