JPH10224967A - Wire harness for automobile and dimensional tolerance absorbing method for the wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To align a clip secured to a wire harness easily with a stopping hole on the body side. SOLUTION: In a wire harness 10 for automobile where a large number of wires 11 are bundled by winding a tape 12 and a clip 13 for stopping the car body is fixed to the outer circumference of the taped and bundled part, an exposed section X not subjected to taping is provided and the wire group at the exposed section is slackened to provide a displacement absorbing part 15 so that the dimensions and the angle between the clips can follow up a car body stopping hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness for automobiles and a method of absorbing crossover of dimensions of the wire harness. If the distance between the locking holes does not match the distance between the clips, the distance between the clips can be easily adjusted to match the distance between the locking holes. The clip can be followed when the position of the locking hole changes.

[0002]

2. Description of the Related Art Conventionally, a clip for attaching to a vehicle body panel is fixed to a wire harness to be routed in a vehicle in advance by band fixing or tape winding.
However, when arranging the wire harness in an automobile, the distance between the clips attached to the wire harness and the dimensions of the locking holes formed in the panel of the automobile often do not match.

[0003] Further, if the position of the locking hole of the vehicle body panel fluctuates due to vibration or the like during driving of the automobile, the clip is overloaded, and the clip may be damaged.

[0004] In addition, the wire harness attached to the vehicle body with the clip vibrates together with the vibration of the engine and the vibration during running of the vehicle, particularly the vibration generated when traveling on a rough road. As a result, the wire harness moves up, down, left, and right, so that the positions of the locking holes in the vehicle body and the clips are different, and there is a problem that the clips are easily loaded and damaged.

In order to solve the above-mentioned problem, the present applicant has disclosed in Japanese Patent Application Laid-Open Nos. 8-24084 and 8-1
No. 63750, etc., a clip is formed separately into a vehicle body locking portion and a wire harness fixing portion, and the clip is formed on the wire harness fixing portion so that the vehicle body locking portion can be moved to adjust the size. doing.

[0006]

However, if the clip is composed of two separate members, the number of parts increases and the cost increases, and the structure of the clip becomes complicated. There is a problem of getting high.

Further, in the above-mentioned conventional clip,
There is also a problem that it takes time and effort to align the vehicle body locking portion and the wire harness fixing portion, and that rattling is more likely to occur between the vehicle body locking portion and the wire harness fixing portion than in an integrated body.

Furthermore, in the configuration of the conventional clip,
Some wire harnesses can absorb displacement in the longitudinal direction, that is, tensile displacement and compressive displacement, but can hardly absorb displacement in bending deformation. .

The present invention has been made in view of the above-mentioned problems, and improves the configuration of the wire harness itself without forming the clip from two separate members, thereby distributing the wire harness to the vehicle body. When rigging, it is easy to adjust the dimensions of the locking hole of the car body and the clip attached to the wire harness, and even after attaching the wire harness to the car body via the clip, the vibration and displacement generated when the car runs An object of the present invention is to enable a clip to easily follow a change in a vehicle body locking hole.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a first aspect of the present invention, wherein an outer periphery of a group of electric wires is tape-wrapped and bound, and a vehicle body engaging hole is formed in an outer periphery of the tape-wrapped binding portion. In an automotive wire harness having a clip to be attached to the vehicle, an exposed section where the tape is not wound is provided, and a wire group in the exposed section is slackened so that a dimension and an angle between the clips are reduced as a displacement absorbing portion. An automobile wire harness is provided, which is capable of following the locking hole of the vehicle body.

In the above configuration, since the electric wire group is slackened in the exposed section where the tape is not wound, when the tape winding portions on both sides of the exposed section are pulled in opposite directions, the electric wire in the exposed section is put on both sides. It is possible to follow the case where the length of the exposed section is extended and the distance between the locking holes of the vehicle body is large. Further, when the tape winding portions on both sides of the exposed section shrink in the approaching direction, the electric wire in the exposed section is compressed from both sides, and the dimension of the exposed section is shortened, so that the dimension between the locking holes of the vehicle body can be followed. Furthermore, when an angle change occurs between the vehicle body locking holes due to vibration and displacement during running of the vehicle, the wire group in the exposed section is bent and can follow the angle change.

Further, when the above-mentioned wire harness is routed in a flooded section such as an engine room side,
Water that has been inundated along the gap between the tape-wrapped electric wires can be drained by falling under its own weight because the gap between the wires is large in the exposed section. The displacement absorbing portion in which the electric wire group is slackened is configured such that the central portion of the electric wire wired in a straight line is expanded in the outer peripheral direction from both ends in the length direction (claim 2).

The formation of the displacement absorbing portion in the above-described embodiment is preferably performed in the following procedure.

That is, when the wires constituting the wire harness are laid on the wiring diagram board, they are laid in parallel, and the outer circumferences of the laid wires are tape-wrapped and bound. An exposed portion where the tape is not wound is provided. Next, the length of the exposed portion is shortened by twisting the wire harness about the axis. Thereafter, the length of the exposed portion is shortened and the original portion is twisted back by the amount of the twist. In the untwisting step, the exposed portion of the electric wire expands from both ends in the length direction of the exposed section in a state in which the central portion is expanded in the outer peripheral direction, thereby forming a displacement absorbing portion in which the electric wire group is bent. .

Further, the present invention is claim 3 and claim 1.
Alternatively, there is provided a method for absorbing dimensional intersections by using the automobile wire harness according to the second aspect. That is, when the interval between clips for locking the vehicle body, which is pre-attached to the wire harness, is different from the interval between the locking holes of the vehicle body panel, and when an angle change occurs between the clip position and the locking hole position. In this method, tension, compression, and bending are generated in the displacement absorbing portion, and the clip is made to follow the position of the locking hole so as to match the position.

[0016]

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

As shown in FIG. 1, a wire harness 10 for an automobile according to the present invention is wound around a tape 12 around a large number of electric wires 11 wired in substantially parallel and bound. A clip 13 for locking the vehicle body is attached to the wire harness 10 at a predetermined position at a predetermined interval. These clips 13 are the blades 1 for locking the vehicle body.
3a and a band portion 13b serving as a wire harness fixing portion are integrated with each other.
It is wound around and fastened and fixed. In addition, instead of the band type, a board-type clip in which a blade portion protrudes from a substrate and the substrate is fixed to a wire harness by tape winding is often used.

Between the clips 13 (13-1 and 13-2) adjacent to each other in the length direction attached to the wire harness 10, a section where the electric wire 11 is exposed without winding the tape 12 is provided. The wire 11 is slackened with X to form the displacement absorbing portion 15.

The displacement absorbing portion 15 relaxes a large number of electric wires 11 wired in a straight line at the tape winding portion in such a manner that the central portion of the electric wire 11 is enlarged in the outer peripheral direction from both ends in the length direction of the exposed section. Not. Therefore, at both ends in the length direction of the displacement absorbing portion 15, as shown in FIG.
The density of the wire group is the highest, and in the central part in the length direction, FIG.
As shown in (C), the density of the electric wire group is the coarsest.

The method of forming the displacement absorbing portion 15 is shown in FIG.
It is formed by the procedure shown in (A) to (D). That is, first, as shown in FIG. 3A, when a large number of electric wires 11 constituting the wire harness are laid on a wiring diagram board (not shown), they are laid in parallel, and this wiring is performed. It is wound around the outer periphery of the wire group with a tape 12 and bound. At this time, waterproof performance is provided as a half-wrap winding, and the wire group is held in a straight line. At the time of winding the tape, an exposed section X where the tape is not wound is provided at a required position.

Next, as shown in FIG. 3 (B), the left and right tape winding portions of the exposed section X of the wire harness 10 formed by tape winding are gripped, and an arrow is drawn around the axis L of the wire harness. The wire harness 10 is twisted by being rotated in the opposite direction as shown by. By this torsion, the length of the wire harness 10 including the exposed section X is shortened.

Thereafter, as shown in FIG. 3 (C), the length of the shortened exposed section X is not changed and the original portion is twisted back by the amount of the twist as indicated by an arrow. In the untwisting step, the electric wire 11 in the exposed section X expands from both ends in the longitudinal direction of the exposed section X in such a manner that the central portion thereof is enlarged in the outer peripheral direction.

Finally, the length of the exposed section X is adjusted so that the length between the clips 13 attached to the tape winding portions on both sides becomes a specified length. That is, when the length of the exposed section X in FIG. 3C is longer than the specified length L3, both sides of the exposed section X are shortened in the approaching direction to the specified length L. On the other hand, FIG.
If the length of the exposed section X in (C) is shorter than the specified length L, both sides of the exposed section X are pulled in the opposite direction to the specified length L. In this manner, the displacement absorbing portion 15 having the required specified length L can be easily formed.

The wire harness 10 assembled as described above
When arranging a clip on a car, as shown in FIG.
3 is inserted and locked into the locking hole 21 formed in the vehicle body panel 20 by inserting the blade 13a of the clip. If the pitch of the locking holes 21 on the vehicle body side does not match the pitch of the clips 13 on the wire harness 10 side, the displacement absorbing portions 15 provided on the wire harness 10 are pulled and compressed to thereby make the locking holes 21 and the clip 13 And can easily be matched.

For example, when the dimension (pitch) P1 between the clips 13-1 and 13-2 on the wire harness 10 side is longer than the dimension P2 between the locking holes 21, both sides of the displacement absorbing portion 15 The tape winding portion is compressed in the approaching direction, and the electric wire 11 of the displacement absorbing portion 15 is further bent outward, so that the pitch P1 between clips matches the pitch P2 between locking holes. Conversely, if the dimension (pitch) P1 between the clips 13-1 and 13-2 on the wire harness 10 side is shorter than the dimension P2 between the locking holes 21, the both sides tape winding of the displacement absorbing portion 15 is performed. The wire 11 of the displacement absorbing portion 15 is stretched by pulling the portions in opposite directions, and the pitch P1 between clips is set.
With the pitch P2 between the locking holes.

As described above, the pitch between the clips can be easily adjusted to the pitch between the locking holes of the vehicle body only by compressing and pulling the displacement absorbing portion 15 of the wire harness 10.

Further, even after the wire harness 10 is attached to the vehicle body, the wire harness
Vibration and displacement occur on both the zero and the vehicle body side. For example, in a wire harness that is routed from the engine to the vehicle body, the engine vibrates when the vehicle is running, and the distance between the engine-side locking hole and the vehicle-body-side locking hole increases or decreases, and the wire harness The locking hole may be located at a position bent in the axial direction.

Since the wire harness 10 is provided with the displacement absorbing portion 15 for the vibration and the displacement during the running of the automobile, the clip 13 on the wire harness side can follow the position of the locking hole of the vehicle body. it can.

For example, as shown in FIG. 4, when the pitch between the locking holes on the vehicle body side is smaller than the pitch between the clips, the displacement absorbing portion 15 is further bent so that the clip follows the position of the locking hole. Let it. When the pitch between the locking holes is larger than the pitch between the clips, the displacement absorbing portion 1
5 extends to cause the clip to follow the position of the locking hole.

As shown in FIG. 5, when the position of the locking hole 21 on the vehicle body side is displaced downward and a displacement of an angle α is generated between the locking holes, the displacement absorbing portion 15 becomes The clip 13-2 is bent downward as shown by a chain line, and
To follow.

Further, as shown in FIG. 6, when the wire harness 10 is routed from the engine room side to the room side, when the displacement absorbing portion 15 is located on the engine room side, the tape winding portion of the wire harness 10 The water that infiltrates through the gap of the electric wire through the gap of
In 5, the gap between the electric wire groups is increased,
Because it is exposed and open to the outside, it falls by its own weight and is drained. Therefore, it is possible to prevent water from entering the room.
Even if the exposed side of the displacement absorbing portion 15 is flooded through the wire harness 10 into the room, the grommet 31 is installed in the through hole of the panel 30 that separates the engine room from the room. The grommet 31 can block water from entering the room.

[0032]

As is apparent from the above description, according to the present invention, the wire harness is provided with a section in which the wire group is exposed without applying tape winding, and the wire group is bent in the exposed section. Because the displacement absorbing portion is formed, the distance between the clips for locking the vehicle body, which is attached to the wire harness in advance, is different from the distance between the locking holes of the vehicle body panel, and the position of the clip and the position of the locking hole are different. When the angle is changed, tension, compression, and bending are generated at the displacement absorbing portion, and the clip can follow the position of the locking hole so as to match the position.

Further, even when the position of the vehicle body locking hole and the clip is displaced due to the vibration and displacement generated when the automobile is running, the displacement absorbing portion is pulled, compressed, and bent, and automatically becomes a wire harness. Can follow the position of the vehicle body locking hole. Therefore, the clip is not overloaded and the clip is damaged and breaks,
It is possible to prevent the wire harness from deviating from the predetermined locking position.

As described above, the length of dimensional absorption can be freely set by the amount of deflection in the displacement absorbing portion,
The degree of freedom in design increases. Further, unlike the related art, there is no need to use a clip having a special configuration, and a general-purpose clip may be used.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of a wire harness of the present invention.

2A is a cross-sectional view taken along the line II of FIG. 1, FIG. 2B is a cross-sectional view taken along the line II-II of FIG. 1, and FIG.
It is an I line sectional view.

FIGS. 3A, 3B, 3C, and 3D are schematic views showing a procedure for forming a wire harness according to the embodiment.

FIG. 4 is a schematic diagram showing an absorption method when a pitch between clips and a pitch of a vehicle body locking hole at the time of wiring of a wire harness are different.

FIG. 5 is a schematic view showing an absorption method when an angle change occurs in a vehicle body locking hole.

FIG. 6 is a schematic view showing another operation of the wire harness of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wire harness 11 Electric wire 12 Tape 13 Clip 15 Displacement absorption part 20 Body 21 Locking hole X Exposed section

Claims (3)

[Claims] 1. An automobile wire harness, wherein an outer periphery of an electric wire group is wound around with a tape and bound, and a clip which is engaged with a vehicle body engaging hole is attached to an outer periphery of the tape-wrapped binding portion. Provide an unexposed section, loosen the wire group of the exposed section as a displacement absorption portion,
A wire harness for an automobile, wherein a dimension and an angle between the clips can follow the vehicle body locking hole. 2. The displacement absorbing portion which has slackened the wire group,
2. The automobile wire harness according to claim 1, wherein the electric wire wired in a straight line is configured such that a central portion thereof is enlarged in diameter in an outer peripheral direction from both ends in a longitudinal direction. 3. A method for absorbing dimension crossing by using the automobile wire harness according to claim 1 or 2, wherein a distance between vehicle body locking clips previously attached to the wire harness is set to be smaller than a predetermined value. When the distance between the locking holes of the vehicle body panel is different, and when an angle change occurs between the clip position and the locking hole position, tension, compression,
A method of absorbing a dimension crossing of a wire harness, wherein a clip is made to follow a position of a locking hole by causing bending to match the position.