JP2000299913A - Wire harness fixing structure - Google Patents

Abstract

(57) [Problem] To provide a wire harness fixing structure capable of reducing the insertion force of a clip into a flange and thereby ensuring good operability. SOLUTION: This is a fixing structure of a wire harness for fixing the electric wire 10 by engaging a clip 20 having a U-shaped cross section holding the electric wire 10 with a flange 30 protruding from a fixed side, the clip 20 comprising: The lock claw 2 is attached to the tip of at least one pair of the holding pieces 23 that sandwich the flange 30.
6 project from each other, and the flange 30 is provided with a locking surface 3 for locking each locking claw 26 of the clip 20.
2 and a sliding surface 33 that guides the lock claw 26 in sliding contact when the clip 20 is inserted, and the sliding surface 33 is formed to have fine irregularities by graining.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness fixing structure for fixing a clip holding an electric wire to a flange by engaging the clip with the flange, and more particularly, to a wire harness capable of reducing the insertion force of the clip into the flange. Related to fixed structure.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional wire harness fixing structure is such that an electric wire 40 is held on a fastener 42 by a tape 41 or the like, and the fastener 42 is engaged with a flange member 43 and fixed. There is something to do. Fastener 4
2 is engaged with the flange member 43 such that the flange member 43 is sandwiched between a pair of opposed arm portions 44. At this time, the engaging projection 45 formed at the tip of one arm portion 44 of the fastener 42 is engaged with the locking portion 4 of the flange member 43.
6 locked. This prevents the fastener 42 from falling off the flange member 43.

[0003]

However, in the above-described conventional wire harness fixing structure, the engagement of the fastener 42 with the flange member 43 is performed by the inner surface of the arm portion 44 of the fastener 42 being the flange member. 43, and is inserted while sliding on the outer surface of the base member 43 in surface contact or line contact. For this reason, the frictional resistance when inserting the fastener 42 becomes large, and there is a problem that a large insertion force is required to engage with the flange member 43.

[0004] The present invention has been made in view of such a conventional problem, and a wire harness fixing structure capable of reducing the insertion force of a clip into a flange and thereby ensuring good operability. It is intended to provide.

[0005]

According to a first aspect of the present invention, there is provided a wire harness fixing structure in which a clip holding an electric wire is engaged with a flange protruding from a fixed side. In the wire harness fixing structure for fixing the electric wire by making the electric wires fixed, a sliding surface having minute unevenness is formed at a portion where the clips are slid in contact with each other when the clip is inserted into the flange.

In this wire harness fixing structure, when the clip is engaged with the flange, a sliding surface having minute irregularities is formed at a portion where the clip and the flange are in sliding contact with each other. The contact state with the clip becomes substantially a point contact state, and the frictional resistance when the clip is inserted into the flange can be reduced. This improves the workability of attaching the clip.

According to a second aspect of the present invention, there is provided a wire harness fixing structure for fixing an electric wire by engaging a U-shaped clip holding the electric wire with a flange protruding from the fixed side. In the above structure, the clip is provided with a locking claw protruding from a distal end portion of at least a pair of holding pieces sandwiching the flange, respectively, and the flange has a locking surface for locking each locking claw of the clip. And a sliding surface that guides the lock claw by sliding the guide when the clip is inserted, wherein the sliding surface is formed with minute irregularities.

With this wire harness fixing structure, when the clip is engaged with the flange, each lock claw of the clip is guided in sliding contact with the sliding surface of the flange, and is finally locked on the locking surface. . At this time, since the sliding surface of the flange is formed on a surface having minute irregularities, the contact state between each lock claw of the clip and the sliding surface becomes substantially a point contact state, frictional resistance is greatly reduced, and clip Can be reduced when inserting the flange into the flange. This improves the workability of attaching the clip.

According to a third aspect of the present invention, the sliding surface is formed by embossing.

In this wire harness fixing structure, a fine uneven surface can be easily formed by graining.

According to a fourth aspect of the present invention, in the wire harness fixing structure, the sliding surface is formed as a tapered surface forming a predetermined angle with respect to a direction in which the clip is engaged with the flange.

In this wire harness fixing structure, the sliding surface is formed as a tapered surface that forms a predetermined angle with respect to the direction of engagement of the clip with the flange, thereby reducing frictional resistance when inserting the clip. Therefore, the force for engaging the clip can be further reduced.

According to a fifth aspect of the present invention, there is provided the wire harness fixing structure, wherein the clip is provided with a through hole penetrating in the direction of projection of the holding piece.

[0014] In this wire harness fixing structure, the die structure for producing the clip can be a simple up-down punching structure, and the manufacturing process can be performed while reducing the cost in a small number of steps without complicating the manufacturing process. A possible clip structure can be provided.

According to a sixth aspect of the present invention, there is provided a wire harness fixing structure, wherein a punched hole is formed at a base of the flange so as to penetrate in a projection direction of the flange corresponding to the locking surface. .

In this wire harness fixing structure, the die structure for producing the flange can be a simple up-down punching structure, and the manufacturing process can be performed with a reduced number of man-hours without complicating the manufacturing process. Possible flange constructions are possible.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wire harness fixing structure according to the present invention will be described below in detail with reference to the drawings. FIG.
1 is an exploded perspective view showing a fixing structure of a wire harness according to a first embodiment of the present invention, and FIG. 2 is a view showing a cross section of a side surface and a flange of a clip shown in FIG.

Referring to FIG. 1, in the wire harness fixing structure of the present embodiment, an electric wire 10 is
0 and insert the clip into the flange 30 formed on the vehicle body side, for example, in the direction A (the direction of the arrow A in FIG. 1).
To fix the electric wire 10 to the flange 30. The clip 20 has a pair of holding pieces 23 for accommodating the flange 30 on the other side of engagement, which are arranged on one side of an electric wire holding portion 21 formed in a flat shape so as to face each other. Is done.

The wire holding portion 21 holds the wire 1 in its longitudinal direction.
The electric wire 10 is held by fixing it with a tape or the like 24 in a state where it is aligned with 0. Each of the holding pieces 23 has flexibility, and when the clip 20 engages with the flange 30, the inclined surface 23 a at the tip of the holding piece 23 is brought into contact with the claw guide surface 33 which is the sliding surface of the flange 30. The flange 30 is bent while sliding, and the flange 30 is inserted into the flange accommodating portion 22 from the tip of the holding piece 23. As described above, each of the holding pieces 23 is engaged so as to sandwich the flange 30 from both sides in a state where the claw guide surface 33 of the flange 30 is in contact with the inner surface 22a on the flange accommodating portion 22 side.

A lock claw 26 is provided at the tip of each holding piece 23 so as to project toward the inside of the flange accommodating portion 22. On the other hand, the concave portion 3
When the clip 20 is inserted into the flange 30, each lock claw 26 of the clip 20 slides on the claw guide surface 33 of the flange 30, and finally comes into contact with the engagement surface 32 of each recess 31. Locked.

The claw guide surface 33 is formed on a side surface from the upper end of the flange 30 to the concave portion 31, and at least one side surface has a predetermined angle θ with respect to the insertion direction A of the clip 20.
(For example, 2 to 3 degrees). The surface of the claw guide surface 33 is subjected to surface processing for forming minute irregularities, and in this embodiment, grain processing for forming a mountain-shaped projection pattern which is partially enlarged in FIG. 1 is performed. This textured surface is formed at the same time when the flange 30 is integrally formed of resin or the like, and the inner surface 37a of the molding die (upper die) 37 of the flange 30 shown in FIG. Can be easily obtained by a known method of roughening.

The clip 20 is formed with a through hole 28 penetrating from the flange accommodating portion 22 in the direction in which the holding piece 23 projects (upward as shown in FIG. 1). This hole 28
Are the flange accommodating portion 22 of the clip 20 and the lock claw 2
The mold for molding 6 is intended to be a mold having a simple so-called upper and lower punching structure, whereby the clip 20 can be easily molded and cost can be reduced.

Then, as shown in FIG.
A pair of punched holes 34 are also formed through the recesses 31 in the direction in which the grooves are drilled (downward in FIG. 2). Each of the side holes 34 is for forming a mold for forming each recess 31 of the flange 30 into a so-called upper and lower punching mold structure, thereby facilitating the formation of the flange 30 and reducing costs. Can be achieved.

Next, the operation of the wire harness fixing structure according to the present embodiment will be described. When the clip 20 is inserted into the flange 30 along the arrow A as shown in FIG.
Each holding piece 23 of the clip 20 is a lock claw 2 shown in FIG.
The sixth inclined surface 23 a is bent outward while slidingly contacting the claw guide surface 33 of the flange 30, and sandwiches the flange 30. Then, the clip 20 is fixed to the flange 30 by locking the lock claw 26 to the locking surface 32 of the flange 30.

When the inclined surface 23a formed on the lock claw 26 of the clip 20 is brought into sliding contact with the claw guide surface 33 of the flange 30, the surface of the claw guide surface 33 forms fine irregularities (texture processing). Is performed, the contact state between the inclined surface 23a of the lock claw 26 and the claw guide surface 33 of the flange 30 becomes substantially a point contact state. Therefore, the friction between the inclined surface 23a of the lock claw 26 and the claw guide surface 33 of the flange 30 is suppressed low, and the clip 20 can be engaged with the flange 30 with a small insertion force with a single touch. Thus, the workability of attaching the wire harness can be greatly improved.

Next, a second embodiment of the wire harness fixing structure according to the present invention will be described. FIG. 4 is an exploded perspective view showing the fixing structure of the wire harness of the present embodiment. In the present embodiment, the clip described in Japanese Patent Application Laid-Open No. 7-99719 is engaged with a flange that has been subjected to surface processing on which minute irregularities are formed.

The clip 50 according to the present embodiment includes a narrowing portion 51 having a U-shaped cross section in which two pieces are opposed to each other, and a flat wire holding portion supported on the outer surface of one of the two pieces. 5
Two. The narrow attachment portion 51 is made of resin, and a metal spring member 53 having a U-shaped cross section is provided on the inner surface thereof similarly to the narrow attachment portion 51. The open end of the narrow attachment portion 51 is formed in a U-shape inward, and the open end of the spring member 53 is locked in the U-shaped portion. A lock claw 54 is formed at the open end of the clip 50 by being cut and raised into the clip 50. The lock claws 54 are arranged one on each of the left and right sides of one piece of the clip 50, and one is installed at the center of the other piece. The clip 50 is elastically deformable in the opening and closing directions.

When the clip 50 is inserted into the flange 40 along the arrow B, the locking claws 54 engage with the clip 40 so as to bite the surface of the flange 40, thereby preventing the clip 50 from being detached from the flange 40. The open ends of the clips 50 are connected by a pair of connecting pieces 55. The connecting piece 55 is formed at the left and right ends of the open end, and a thin fragile portion is formed at the center of the connecting piece 55.

Next, the operation of the wire harness fixing structure according to the present embodiment will be described. When the clip 50 is inserted into the flange 40 along the arrow B as shown in FIG.
The clip 50 is pressed by engaging the connecting portion 55 with the tip of the flange 40, and is bent inward at the weak portion of the connecting portion 55. As a result, the clip 50 inserts the flange 40 inward, and each locking claw 54 of the clip 50
0 so as to be engaged with the surface 56.

As described above, when the clip 50 is engaged with the flange 40 inward, the surface of the flange 40 is subjected to a crimping process for forming minute irregularities, so that the clip 50 and the flange 40 are connected to each other. The contact state is substantially a point contact state. Therefore, the friction between the clip 50 and the flange 40 can be kept low, whereby the clip 50 can be engaged with the flange 40 with a low insertion force.

As described in detail above, according to each of the above embodiments, the claw guide surface 33 of the flange 30 (first embodiment) or the portion 56 of the surface of the flange 40 which comes into sliding contact with the clip 50 (second embodiment). By applying surface processing (texture processing) on the sliding surface that is
The contact between the clips 20, 50 and the flanges 30, 40 can be changed from a surface contact or a line contact with a large frictional resistance to a substantially point contact with a small frictional resistance. 50 can be greatly reduced. Thereby, good operability can be ensured.

In the first embodiment, the lock claw 26 of each holding piece 23 of the clip 20 is slidably brought into contact with the claw guide surface 33 of the flange 30 and is locked to the locking surface 32 (first embodiment). In the second embodiment, the clip 5
Although the structure in which the lock claw 54 of the zero spring member 53 is engaged so as to bite the surface 56 of the flange 40 has been described, any structure may be used as long as the clip is slidably engaged with the flange surface. It is also applicable to clips and flanges.

The surface processing (texture processing) is performed by a molding die at the time of resin molding of the flange, but other forming methods include etching and electric discharge processing. In addition, the concavo-convex pattern by surface processing (texture processing)
The present invention is not limited to the mountain-shaped projection pattern shown in an enlarged manner in FIG. 4, and various patterns can be applied.

[0034]

According to the present invention, a contact surface between a clip and a flange is formed by forming a sliding surface having minute unevenness at a portion where the clip is slid on each other when the clip is engaged with the flange. A point contact state is established, and the frictional resistance when the clip is inserted into the flange can be reduced.
Thereby, the insertion force of the clip can be kept low, and the workability of attaching the clip can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a first embodiment of a wire harness fixing structure according to the present invention.

FIG. 2 is a view showing a side surface of the clip of FIG. 1 and a cross section of a flange.

FIG. 3 is a sectional view of a main part showing a mold used for forming a flange.

FIG. 4 is an exploded perspective view showing a configuration of a second embodiment of the wire harness fixing structure according to the present invention.

FIG. 5 is a perspective view showing a conventional wire harness fixing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electric wire 20 Clip 23 Clamping piece 23a Inclined surface 26 Lock claw 30 Flange 31 Depression 33 Claw guide surface 37 Mold A Insertion direction of clip into flange θ Angle formed by tapered claw guide surface with respect to insertion direction A

Claims (5)

[Claims] 1. A wire harness fixing structure for fixing an electric wire by engaging a clip holding an electric wire with a flange protruding from a fixed side, wherein the clips slide in contact with each other when the clips are inserted into the flange. A fixing structure for a wire harness, wherein a sliding surface having minute irregularities is formed in a portion to be formed. 2. A wire harness fixing structure for fixing an electric wire by engaging a U-shaped clip holding an electric wire with a flange protruding from a fixed side, wherein the clip sandwiches the flange. Lock claws are protruded from the ends of at least one pair of holding pieces so as to face each other, and the flange is formed with a locking surface for locking each lock claw of the clip, and the flange is inserted. And a sliding surface for occasionally sliding and guiding the lock claw, and wherein the sliding surface is formed with minute irregularities. 3. The fixing structure according to claim 1, wherein the sliding surface is formed by embossing. 4. The sliding surface according to claim 1, wherein the sliding surface is formed as a tapered surface that forms a predetermined angle with respect to a direction in which the clip is engaged with the flange. The fixing structure of the wire harness according to the item. 5. The clip according to claim 2, wherein a hole is provided in the clip so as to penetrate the clip in a projection direction.
The wire harness fixing structure according to claim 1. 5. The base according to claim 2, wherein a hole is provided at a base of the flange so as to penetrate in a projection direction of the flange corresponding to the locking surface. Wire harness fixing structure.