JP2575619Y2 - Waterproof grommet - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure in which a rigid cover for preventing detachment of a rigid inner member fitted into an elastic grommet body is improved.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional waterproof grommet described in Japanese Utility Model Publication No. Hei 3-10577. The waterproof grommet 25 includes an elastic grommet main body 26 made of synthetic rubber, a rigid inner member 27 made of synthetic resin fitted in the grommet main body 26, and a ring for tightening the grommet main body 26 toward the inner member 27. 28.

The grommet main body 26 is formed by connecting an annular flange portion 32 that is in close contact with a panel 31 to a cylindrical portion 30 through which a wire harness 29 is inserted and in close contact, and the inner member 27 is provided inside the flange portion 32. A cup-shaped part 36 having a wire harness insertion hole 34 and a panel locking claw 35 is coupled to an annular flange plate 33 fitted to the grommet, and the locking claw 35 is locked in the panel hole 38 to form a grommet. Body 2
6, the lip 37 of the flange hem 32a is brought into close contact with the panel surface 31 to achieve waterproofing.

However, in the above-described conventional structure, when a strong pulling force is applied to the wire harness 29 in the direction of arrow A, the ring 28 may be deformed. Hem 3
There was a concern that rainwater would enter the grommet 25 due to the roll-up of 2a. Further, there is another problem that the mounting of the ring 28 is troublesome and the assembling workability is poor.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a waterproof grommet which not only prevents the flange hem of a grommet body from being rolled up but also provides good assembling workability. Aim.

[0006]

According to the present invention, a rigid inner member for locking a panel hole is fitted inside a panel contact flange portion of an elastic grommet body through which a wire harness is inserted. A waterproof grommet in which a rigid cover for fixing is slidably fitted to the outside of the flange portion, wherein a sliding contact projection having a small contact area with the inner surface of the rigid cover or the surface of the flange portion with respect to the inner surface. Is provided.

[0007]

The whole flange is fixed by attaching the rigid cover to the entire flange of the grommet body.
Rolling up is prevented. Further, when the rigid cover is slidably mounted, the protrusion having a small contact area comes into contact with the mating surface, so that the sliding resistance is reduced and the mountability is improved.

[0008]

FIG. 1 is an exploded perspective view showing an embodiment of a waterproof grommet according to the present invention, FIG. 2 is a perspective view showing an assembled state of the waterproof grommet, and FIG. 3 is a sectional view taken along line AA of FIG. . In the figure, 1
Is a rubber elastic grommet main body, 2 is a synthetic resin rigid inner member fitted inside the grommet main body 1,
Reference numerals 3 and 4 denote a pair of left and right rigid covers made of synthetic resin, which are fitted to the grommet body 1 so as to face each other in a sliding manner.

The grommet body 1 includes a wire harness 5
A rectangular box-shaped intermediate bulging portion 7 is coupled to the base end of the tubular portion 6 through which the upper surface 8a, the side surface 8b and the panel-contacting bottom surface 8c are orthogonal to each other. ) Are formed in the horizontal direction so as to protrude and connect, and ridges 9 and 9 are provided on both sides of the bulging portion 7 to form a flange upper surface 8.
The cover insertion grooves 10 and 10 are formed between the inside of the flange portion 8 and an inner insertion groove 11 (FIG. 3) is provided around the inside of the flange portion 8.

The inner member 2 is provided with a wire harness insertion hole 13 and a panel locking claw 1
The flange plate 12 is fitted in the fitting groove 11, and the locking claw 14 is locked in the panel hole 16. Then, with the inner member 2 attached to the grommet main body 1, a pair of rigid covers 3, 4 are slidingly fitted to the flange portion 8 from right and left so as to face each other, and the flange portion 8 is fixed to prevent the flange portion 8 from rolling up. .

The pair of rigid covers 3 and 4 are formed in a split U-shape, and the upper plate 17 (FIG. 1) and the flange side surface 8 with respect to the flange upper surface 8a of the grommet body 1.
b, and a locking piece 19 having a locking projection 19a on the outer edge of one side plate, and an engaging frame portion 20 for the locking piece 19 on the outer edge of the other side plate. And a plurality of sliding contact ribs 21 as projections having a small contact area are provided on the inner surfaces of the upper plate portion 17 and the side plate portion 18.

As shown in FIG. 4 (a cross-sectional view taken along the line BB in FIG. 1), the rib 21 has an R-shaped tip surface 21a with respect to the upper surface 8a of the flange portion. A plurality of juxtapositions are provided in the transverse direction from the upper plate portion 17 to the side plate portion 18.

As shown in FIG. 5, the sliding contact rib 21 may be formed parallel to the upper plate 17 'and the side plate 18' in the sliding direction of the rigid cover 3 '. Also, rib 2
1 may be provided on the flange portion upper surface 8a of the grommet main body 1 instead of the covers 3 and 4. Further, a plurality of radius tip projections (not shown) may be provided instead of the ribs 21.
The grommet body 1 and the covers 3 and 4 may be formed in an annular shape instead of a rectangular shape.

[0014]

As described above, according to the present invention, not only the entire flange portion is fixed by the rigid cover to improve the waterproofness, but also the rigid cover can be slid by the sliding contact projection when the rigid cover is mounted. The sliding resistance is reduced, and the assembling workability is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a waterproof grommet according to the present invention.

FIG. 2 is a perspective view showing an assembled state.

FIG. 3 is a sectional view corresponding to AA in FIG. 2;

FIG. 4 is a sectional view corresponding to BB in FIG. 1 showing a rigid cover.

FIG. 5 is a perspective view showing a modification of the rigid cover.

FIG. 6 is a longitudinal sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grommet main body 2 Inner member 3, 3 ', 4 Cover 5 Wire harness 8 Flange part 21 Rib for sliding contact

Claims (1)

(57) [Scope of request for utility model registration] A rigid inner member for locking a panel hole is fitted inside a panel contact flange portion of an elastic grommet main body through which a wire harness is inserted, and a rigid cover for fixing is slid outside the flange portion. A waterproof grommet to be fitted in a manner, wherein a sliding contact projection having a small contact area is provided on an inner surface of the rigid cover or on a surface of the flange portion with respect to the inner surface.