JPH1189054A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grommet, which enables distribution in different directions by bending a wire cylinder in which a wire harness is inserted, within a space formed by the internal side panel for loading a grommet and an external side panel providing a narrow internal panel against this internal panel. SOLUTION: This grommet 1 holds, within an internal panel, a plurality of wire harnesses provided through a through-hole formed in the internal panel by branching such wire harnesses into a plurality of wire cylinders 4 and also forms a support section 3 having a flat surface 11, on which a plurality wire cylinders 4 are erected straight. Moreover, a circular groove 14 which is flexibly supports the support section 3 for a grommet body 2 is formed at the external circumference of a support section 3.

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 connecting electrical devices mounted on a vehicle body or the like, which protects the wire harness and seals the through hole when the wire harness is inserted into the through hole of the body panel. And a rubber-integrated grommet.

[0002]

2. Description of the Related Art Conventionally, a wire harness for connecting an electric device mounted on a vehicle body such as an automobile and an electric device on a door panel side is wired in a relatively narrow space in the vehicle body and has a through hole on the body panel side. After being pulled out from the door panel, it is wired into the door panel through the through hole on the door panel side. As the wire harness, a rubber-integrated grommet that protects an exposed portion of the wire harness and seals both through holes of the body panel and the door panel is widely used.

A conventional rubber-integrated grommet 30 shown in FIGS. 4 and 5 is described in Japanese Utility Model Publication No. 57-58664, and is a wire tube portion 32 having a grommet body 31 and a tape winding margin 33. It is composed of An annular groove 34 is formed on the outer periphery of the grommet body 31, and a base end 35 of the electric wire tube 32 is integrally formed on one side of the inner periphery. A peripheral edge 41 of the through hole 37 of the door panel 36 is fitted into the annular groove 34, and the peripheral edge 41 and outer edges of the groove walls 38 and 39 on the annular groove 34 side are in contact with each other. Note that the wire tube portion 32 is configured such that the base end 35 of the intermediate portion 40 can be bent in the axial direction of the grommet main body 31.

In the grommet 30 having the above-described configuration, the bent intermediate portion 40 is inserted by inserting the wire harness 43 into the wire tube portion 32 and pulling the tip 42 before fitting the grommet 30 into the through hole 37 of the door panel 36. In a stretched state (see FIG. 4), a long winding allowance is provided, and the tape 44 is wound over the wire harness 43 from the winding allowance 33. Then, after the winding, the pulling of the distal end 42 is released, so that the proximal end 35 of the intermediate portion 40 returns to the bent normal state. Therefore, the work of winding the tape around the electric wire tube portion 32 can be performed easily and quickly, and the wiring state of the wire harness 43 in a place where the distance from the other panel 45 is small can be stabilized.

However, in the grommet 30,
Further, it cannot cope with a wire harness which is inevitably increased when a large number of electric devices are mounted. A conventional grommet 50 of another configuration shown in FIG.
26, which can cope with a case where the number of wire harnesses increases in proportion to an increase in the mounting amount of electric equipment. The grommet 50 has a large-diameter mounting portion 51 and a small-diameter electric wire insertion tube portion 52. The mounting portion 51 has an elliptical outer peripheral shape, and an annular mounting groove 53 is formed around the entire middle portion. I have. On one side of the annular mounting groove 53, a deformation allowable flange portion 55 having a tapered fitting guide surface 54 is formed,
An abutment collar 56 is formed on the other side. A reinforcing support part 57 is integrally provided inside the elliptical mounting part 51 in the minor diameter direction.

In order to attach the grommet 50 having the above-described configuration to the through hole 61 of the panel 60, a wire harness 63 is branched and inserted into the electric wire insertion tube 52, and the mounting portion 51 is provided.
When the tapered fitting guide surface 54 of the deformable flange 55 is pressed against the through-hole 61 and pressed into the through-hole 61 while deforming the deformable flange 55, the annular mounting groove 53 is formed.
Can be engaged with the peripheral edge of the through hole 61 of the panel 60. The grommet 50 facilitates the mounting operation to the panel through hole 61 by providing the reinforcing support portion 57 in the short diameter direction in the mounting portion 51, and prevents the abutment flange portion 56 from being narrowed at the time of mounting. The mounting state can be stabilized.

[0007]

However, when the grommet 50 having the above structure is provided with another panel 64 at a position close to the distal end side of the electric wire insertion tube 52, the grommet 50 has the same structure. Are bent in appropriate directions, and it is difficult to arrange the wire harness rationally and economically. In addition, the grommets 30 and 50 having the above-described configuration have a problem that they cannot sufficiently cope with a case in which many electric devices are mounted and a large number of wire harnesses for connecting the electric devices are incorporated.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a wire tube part in which a wire harness is inserted into a space between an inner panel on which a grommet is mounted and an outer panel having a small gap with the inner panel. It is an object of the present invention to provide a grommet that can be bent and arranged in different directions and that is easy to manufacture.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wire harness which is inserted through a through hole formed in an inner panel and is branched into a plurality of wire tube portions and held on the inner panel. In the grommet, a supporting portion having a flat surface on which the plurality of electric wire tube portions stand upright is formed, and an annular groove for flexibly supporting the supporting portion with respect to the grommet body is formed on an outer peripheral edge of the supporting portion. The problem can be solved by a grommet characterized by being formed.

[0010] According to the grommet having the above structure, the support portion having the flat surface on which the plurality of wire tube portions stand upright is formed, and the annular groove for flexibly supporting the support portion with respect to the grommet body is formed. Since the wire harness is formed on the outer peripheral edge of the support portion, it is possible to protect and seal a large amount of the wire harness, and it is possible to bend the wire tube portion through which the wire harness is inserted in a narrow place. Therefore, it is possible to arrange a plurality of electric wire tube portions in different directions, and it is possible to simplify the grommet structure to facilitate the production of the grommet.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the grommet according to the present invention will be described below in detail with reference to FIGS.
FIG. 1 is a perspective view of a grommet showing one embodiment of the present invention, FIG. 2 is a cross-sectional view in FIG. 1, and FIG. 3 is an operation explanatory view of a grommet showing one embodiment of the present invention.

As shown in FIGS. 1 and 2, a grommet 1 according to the present embodiment includes a grommet body 2 and a support portion 3 supported by the grommet body and having a plurality of wire tube portions 4 erected. It is composed of In the outer peripheral portion of the grommet main body 2, the grommet main body is inserted into the through hole 6 of the inner panel 5.
Annular groove 7 which clamps the peripheral edge of the through hole when fitted in
Are formed. In addition, the annular groove 7 of the grommet body 2
A fixed flange 8 is formed on the outside, and a through hole 6 is formed on the inside.
An engagement collar portion 9 that can be elastically reduced when passing through the inside is formed. Also, on the inner peripheral side of the grommet body 2,
A hollow portion 10 through which a wire harness can be inserted is formed.

On the flat surface 11 of the support portion 3, there are provided three wire tube portions 4 standing at appropriate intervals from adjacent ones and having different lengths and tube diameters. It is possible to select and use the wire tube portion 4 having an optimum length and a tube diameter according to the specifications of the wire harness. Further, a plurality of restraining walls 12 for restraining the outer peripheral portion of the wire harness are provided at appropriate intervals in the opening portion and the hollow portion of the electric wire tube portion 4. The hollow portion of the wire tube portion 4 communicates with the hollow portion 10 on the grommet body 2 side, and an annular protrusion 13 for winding a tape is formed on the outer peripheral portion of the open end of the wire tube portion 4. ing.

Further, an annular groove 14 is formed on the outer peripheral edge of the support portion 3.
Is provided. The annular groove is formed by a bent flexible connecting portion 15 and is flexibly supported by the grommet body 2 via the connecting portion.

In the grommet 1 of the present embodiment having the above-described structure, the grommet main body 2 penetrates the inner panel 5 in a state where the wire harness is branched and inserted into the hollow portion 10 and the three electric wire tube portions 4. The peripheral edge of the through hole is engaged with the annular groove 7 by being fitted into the hole 6. Next, as shown in FIG. 3, the wire harness inserted into the electric wire tube portion 4 is bent together with the electric wire tube portion 4 in the direction in which the electric devices are arranged within a narrow range blocked by the outer panel 17. At this time, the entire wire tube portion 4 bends so as to be inclined in a desired direction together with the support portion 3 around the base of the wire tube portion 4 by the annular groove 14 provided on the outer peripheral side of the support portion 3. Therefore, the wire harness can be easily bent in a desired direction even in a narrow panel space together with the wire tube portion 4.

That is, the wire harness 16 disposed in the hollow portion 10 of the grommet body 2 below the support portion 3 that is not directly held by the wire tube portion 4 is configured such that the wire harness 16 above the support portion 3 is a wire harness. While the wire harness 16 is not restrained, the wire harness 16 itself is not subjected to an unreasonable restraining force. Accordingly, since the wire harness 16 in the hollow portion 10 is not substantially distorted since the wire harness 16 is extruded substantially linearly in the direction opposite to the upward bending direction.

As described above, the grommet 1 according to the present embodiment has the support portion 3 having the flat surface 11 on which the three wire tube portions 4 are erected, and the grommet body 3 An annular groove 14 that flexibly supports the support 2 is formed on the outer peripheral edge of the support portion 3. Therefore, since the support portion 3 itself can be bent by the annular groove 14 formed on the outer peripheral edge, the bendability of the electric wire tube portion 4 is further enhanced, and the wire harness in the tube portion is moved in the direction of the electric device. It can be easily folded to tilt. Therefore, the degree of freedom of wiring of the wire harness is increased, and the work of winding the tape around the wire harness at the end of the electric wire tube portion 4 is facilitated, so that the workability can be improved. In addition, since the structure of the support portion 3 can be relatively simplified, the grommet including the manufacturing mold and the like can be easily manufactured, and the manufacturing cost can be reduced.

[0018]

As described above, the grommet of the present invention forms a supporting portion having a flat surface on which a plurality of wire tube portions stand upright, and flexibly supports the supporting portion with respect to the grommet body. An annular groove is formed on the outer peripheral edge of the support portion. Accordingly, since the support portion itself can be bent, the bendability of the wire tube provided on the support portion is further enhanced. Therefore, each of the wire harnesses can be easily and easily bent in the direction of the electric device, and the degree of freedom in arranging the wire harnesses can be increased.

Further, the work of winding the tape around the wire harness in the electric wire tube portion becomes easy, and the workability around the grommet can be improved. In addition, since the wire tube portion is formed on the flat surface of the support portion, the structure of the grommet can be simplified, and the manufacturing cost can be reduced by easily manufacturing the grommet including the manufacturing mold. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a grommet of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is an operation explanatory view of the grommet of the present invention.

FIG. 4 is a sectional view of a conventional grommet.

FIG. 5 is an operation explanatory view in FIG. 4;

FIG. 6 is a sectional view of a conventional grommet having another configuration.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grommet 2 Grommet main body 3 Support part 4 Electric wire tube part 5 Inner panel 6 Through hole 11 Flat surface 14 Annular groove 15 Connecting part 16 Wire harness 17 Outer panel

Claims (1)

[Claims] 1. A grommet for branching a plurality of wire harnesses passing through through holes formed in an inner panel into a plurality of wire tube portions and holding the wire harness on the inner panel, wherein the plurality of wire tube portions are upright. A grommet, comprising: a support portion having a flat surface which is formed; and an annular groove for flexibly supporting the support portion with respect to the grommet body is formed on an outer peripheral edge of the support portion.