JPH0532159U - Harness grommet - Google Patents

Abstract

(57) [Abstract] [Purpose] Harness grommet 1 that is fitted into the harness insertion hole 4a of the panel 4 that separates the outside from the inside and seals
So that they can be fitted by pulling from the inside. [Structure] The harness grommet 1 is fitted with a fitting groove 12 on the outer peripheral portion.
A main body 11 having a cylindrical shape, a cylindrical harness insertion portion 13 protruding outward and having a seal portion S at its tip, an introducing wall portion 14 having a tapered surface protruding inward, and further inside the introducing wall portion 14. It is configured to have a tubular harness fitting portion 15 protruding toward the side, and the harness inserting portion 13 and the harness fitting portion 1 are formed.
5 by penetrating the harness 2 and pulling the harness fitting portion 15 from the inside of the harness insertion hole 4a,
The peripheral edge of the harness insertion hole 4a is fitted into the fitting groove 12.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a harness grommet that is fitted into a harness insertion hole of a panel that separates an engine room (outside) and a vehicle interior (inside) of a vehicle, for example, to prevent water and the like from entering the inside from the outside.

[0002]

[Prior Art]

 As shown in FIG. 3, the grommet A interposed between the harness B and the harness insertion hole C ′ of the panel C has a cylindrical harness insertion portion A1 through which the harness B is inserted and supported in a central portion. In general, it is more common than before to integrally form a rubber material or the like into a structure having a fitting groove A2 fitted in the insertion hole C'on the outer peripheral portion (for example, Japanese Utility Model Publication No. 63-14 3450). See the bulletin).

[0003] First, the harness B is penetrated through the harness insertion portion A1 of the grommet A (the hole diameter of the harness insertion portion A1 is expanded by a jig to penetrate the harness), and the harness B and the outer periphery thereof are attached. A tape D is wound around the outer periphery of the harness insertion portion A1 which is in pressure contact with the tip portion to seal the portion, and the sealing portion S formed by the tape D is attached from the outside of the insertion hole C'as indicated by an arrow. By pulling, the edge of the insertion hole C'is fitted and fixed in the fitting groove A2.

[0004]

[Problems to be solved by the device]

 However, due to the shape of the body on the outside of the panel C (for example, the engine room) and the parts mounted in the vicinity thereof, it is relatively difficult to pull the seal portion S from the outside. In such a case, the grommet A is used. It is inevitable to push the outer peripheral part of the inside from the inside (inside the vehicle body), but it is extremely difficult to apply a uniform force over the entire circumference in the pushing work, and it is necessary to install it securely. There is a problem that it takes a considerable amount of work.

The present invention mainly aims to address the above-mentioned conventional problems.

[0006]

[Means for Solving the Problems]

 The present invention relates to a harness grommet, for example, as shown in FIG. 2, a main body 11 having a fitting groove 12 on an outer peripheral portion thereof, and a cylindrical harness inserting portion protruding outward from a central portion of the main body 11. 13, an introducing wall portion 14 protruding from the inner side edge of the fitting groove 12 toward the inner side in the form of a tapered surface, and an inwardly projecting portion from the inner side end portion of the introducing wall portion. The first feature is that it is integrally formed into a shape having a tubular harness fitting portion 15, and in the above, the base portion 13a of the harness inserting portion 13 is made thin so that it can be deformed in a beloose manner. The second feature is that the harness fitting portion 15 is provided with a notch 16 continuous from the vicinity of the root portion.

[0007]

[Action]

 In the first feature, by pulling the harness fitting portion 15 from the inside of the harness insertion hole 4a of the panel 4, the periphery of the harness insertion hole 4a is guided by the introduction wall portion 14 and fitted in the fitting groove 12. Therefore, it is possible to easily and surely perform the mounting from the inner side where the working space is sufficient. Further, according to the second feature, the harness insertion portion 13 or the harness fitting portion 15 is attached to the harness insertion portion 13 by the axial load applied to the harness insertion portion 13 via the harness during the mounting work or the bending of the harness near the harness grommet 1 after mounting. Such a load is absorbed by the bellows-like deformation of the root portion 13a and the easiness of deformation of the harness fitting portion 15 due to the notch 16, and the like, and the seal portion S and the fitting groove at the tip of the harness insertion portion 13 are absorbed. Almost no stress is applied to the fitting portion between the wire 12 and the periphery of the harness insertion hole 4a, and the problem of impairing the sealing property does not occur.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a harness grommet, and the harness grommet 1 has a main body 11 having a fitting groove 12 on an outer peripheral portion, and a cylindrical shape protruding from the vicinity of a central portion of the main body 11 to the outside. Harness insertion part 13, an introduction wall part 14 protruding from the fitting groove 12 part toward the inside by forming a tapered surface of the tip, and from the vicinity of the central part of the introduction wall part 14 to the inside side. The harness fitting portion 15 projecting inward is integrally formed of an elastic material such as rubber.

The harness insertion portion 13 protruding to the outside and the harness fitting portion 15 protruding to the inside are arranged on the same center line.

The harness insertion portion 13 and the root portion thereof are configured to be considerably thin with respect to the thickness of the main body 11 and the introduction wall portion 14. Particularly, the thin root portion 13 a is recessed inward from the outer surface of the main body 11. By the bellows-like deformation of the root portion 13a, the harness insertion portion 13 can be displaced with respect to the main body 11 in the axial direction to some extent within a reasonable range. The harness fitting portion 15 is provided with a notch 16 which is continuous from the vicinity of the root of the harness fitting portion 15. The notch 16 enables the diameter of the harness fitting portion 15 to be easily expanded, and also allows easy die-cutting during molding. And it is designed to improve productivity.

In the embodiment shown in FIG. 1, a plurality of cable mounting portions 17 for penetrating a cable are provided on the outer side surface of the main body 11 so as to project outward, and the harness grommet 1 also serves as a grommet for inserting a cable. However, the cable insertion portion 17 may be omitted.

A method of using the harness grommet 1 will be described below with reference to FIG.

First, using a jig (not shown), the hole diameter of the harness insertion portion 13 is expanded and the harness 2 is penetrated into the harness insertion portion 13 and the harness fitting portion 15, and the jig is removed. As a result, the hole diameter of the harness insertion portion 13 is restored, and the tip of the harness insertion portion 13 elastically contacts the outer circumference of the harness. The tape 3 is wrapped around the elastic contact part to seal the part. The tape 3 is also wound around and fixed to the contact portion between the harness fitting portion 15 and the harness 2 penetrating therethrough.

Then, as shown in FIG. 2, the harness fitting portion 15 is inserted from the outside of the harness insertion hole 4a of the panel 4 into the inner side, and the tape of the harness fitting portion 15 is wound inside as shown by an arrow. Pull to the side. Then, the introduction wall portion 14 hits the peripheral edge of the insertion hole 4a and elastically deforms, and the peripheral edge of the insertion hole 4a fits into the fitting groove 12 to complete the attachment.

When the harness fitting part 15 is pulled from the inner side, the harness fitting part 15 is displaced inward toward the main body 11 to some extent, and accordingly, the harness 2 is also displaced inward. As described above, the harness insertion portion 13 can be displaced in the axial direction without difficulty to some extent, so that the harness insertion portion 13 can be displaced inwardly without difficulty following the displacement of the harness 2 toward the inside. No great stress is applied to the seal portion S formed by the tape 3 at the tip of the insertion portion 13, and the sealing function is not impaired. Needless to say, when the harness fitting portion 15 is pulled from the inside, a substantially uniform force is applied to the entire circumference of the introduction wall portion 14, and the fitting is easily and reliably performed.

Further, when the harness 2 has to be bent in the vicinity of the harness grommet 1 with the harness grommet 1 fitted in the insertion hole 4a, the conventional grommet causes stress on the entire grommet. In addition, the sealing of the fitting portion between the fitting groove and the peripheral edge of the insertion hole of the panel may be incomplete or, if it is severe, the fitting portion may come off. Since the inside is hollow and the root portion 13a of the harness inserting portion 13 can be deformed like a bellows and the harness fitting portion 15 can also be deformed by the notch 16, stress due to bending of the harness 2 is It is absorbed by the deformation of the root part 13a of the part 13 or the harness fitting part 15, and almost no stress is applied to the fitting part with the peripheral edge of the insertion hole 4a, which deteriorates the sealing property. There is nothing that you do or lose.

An insulator may be placed in the hollow portion of the harness grommet 1 to reduce the sound transmitted from the outside to the inside.

[0019]

[Effect of the device]

 As described above, according to the present invention, the harness grommet can be pulled from the inner side (inside the vehicle compartment) and fitted into the harness insertion hole of the panel. Since the work space is rarely difficult to take due to the body shape and other parts, it is possible to improve the installation workability and ensure the installation accuracy, which can bring a great effect in practice. Is.

[Brief description of drawings]

1 shows an example of a harness grommet according to the present invention, (A) is a front view, (B) is a rear view, (C) is a side view, and (D) is a cross section taken along line XX of (A). It is a figure.

FIG. 2 is a vertical cross-sectional side view illustrating a mounting work aspect of the harness grommet shown in FIG.

FIG. 3 is a vertical sectional side view showing an example of a conventional harness grommet.

[Explanation of symbols]

 1 Harness Grommet 2 Harness 3 Tape 4 Panel 4a Harness insertion hole 11 Main body 12 Fitting groove 13 Harness insertion part 13a Base part 14 Introducing wall part 15 Harness fitting part 16 Notch

Claims (2)

[Scope of utility model registration request] 1. An integrally formed elastic material such as rubber,
A harness grommet that fits in the harness insertion hole of the panel that separates the outside from the inside to prevent dust and water from entering the inside from the outside, and a fitting groove in which the periphery of the harness insertion hole fits in the outer peripheral portion. The main body, the cylindrical harness insertion portion projecting outward from the vicinity of the central portion of the main body, and the tapered surface that is tapered from the inner edge of the fitting groove toward the inner side. A projecting introduction wall portion and a tubular harness fitting portion projecting inward from an inner side end portion of the introducing wall portion are integrally formed in a shape having a harness insertion portion and a harness fitting portion. Are configured so that their center lines substantially coincide with each other, the harness is inserted through the harness insertion portion and the harness fitting portion, and the tip end portion of the harness insertion portion that is pressed against the outer circumference of the harness serves as a seal portion. From the inside of the panel harness insertion hole Harness grommet, characterized in that the harness insertion hole peripheral edge is configured to fit in in groove fitting by being guided by the introduction wall portion by. 2. The harness grommet according to claim 1, wherein the root portion of the harness insertion portion is thin so that it can be deformed like a bellows, and the harness fitting portion is provided with a notch continuous from the vicinity of the root portion. A harness grommet, which is provided to facilitate expansion of the diameter of the harness fitting portion.