JPS59222670A - Grommet - Google Patents

Abstract

PURPOSE:To make plural draft holes stoppable with a single grommet, by installing a ribbed part consisting of plural members of ribs in position around the grommet. CONSTITUTION:A head part 5 at the push-in side is made to be thick, while a ribbed part 6 is installed in a shaft part 7 beneath the head part at specified intervals. With this constitution, even if a bore diameter and plate thickness differ in size, the ribbed part 6 can extensively meet requirements. That is to say, plural draft holes can be stopped up with a single grommet.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an improvement in a grommet used in a penetrating portion of a vehicle body, etc., to close holes for draining water, electrodeposition paint, etc.

[Prior art]

FIG. 1 shows an example of a conventional grommet. The grommet 1 is made of molded rubber or soft resin, and has a groove 9t to be inserted into a mounting hole provided in a plate 2 of a vehicle body to which it is attached. Lip portions 3 and 4 are provided on the outer periphery.

The diameter of the grommet mounting hole (aX2) is determined according to the amount of water and electrocoated paint that is to be removed through the grommet! '1. All 1.
It varies depending on the situation, and when targeting a car, it is about 1 o.
There are several hole diameters, and the total number of holes used is approximately 6 per vehicle.
The number ranges from 0 to 70.

When the grommet described above is made of molded rubber, it is a mechanical seal that uses elastic deformation due to the tension force of the rubber, so one grommet can accommodate only one type of hole diameter. For this reason, it is necessary to prepare as many grommets as there are holes, depending on the diameter and thickness of the installer, and when fitting the grommets into the holes, the operator must push them in with their fingertips. However, if the hole is large, the number of man-hours required increases.

In response to the increasing variety of holes, conventional methods have been used to cover several types of holes with adhesive sheets, but this method requires reliable crimping during installation, resulting in poor implementation reliability and However, due to problems with the durability and reliability of the adhesive, it was inconvenient that it could only be used in extremely limited areas.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a grommet that can close a plurality of holes with a single grommet and eliminates the above-described drawbacks of the conventional grommet.

[Structure of the invention]

-7 The present invention provides a folded portion having a plurality of umbrella-shaped flanges at predetermined intervals around the grommet.

It is designed to be able to be installed in a wide range of holes with different hole diameters and plate thicknesses, and furthermore, a sealant is interposed during installation.

[Embodiments of the invention]

FIGS. 2(a) and 2(b) show an embodiment of the present invention, in which the head on the push-in side is made thick and pleats 6 are provided at predetermined intervals in the lower part thereof. The fold portion 6 is constructed by arranging a plurality of umbrella-shaped pleats (three in this embodiment) on the shaft portion 7 at predetermined intervals.

In the above configuration, when installing the grommet, insert it into the cutout hole provided in the vehicle body from the side where the umbrella-shaped folds 6 are provided, and push it in until the lower surface of the head 5 contacts the plate material 2. The state shown in FIG. 3 is reached, and the pleats 8 located at a position exceeding the thickness of the plate material 2 insert and grip the plate material 2 between it and the head 5.

In addition, even when installing between boards with different thicknesses as shown in Figure MfJ4, the pleats 8 have a step between each board 2.
’ is pressed and fixed. In the case of holes having different diameters, it is possible to accommodate a wide range of holes from the inner diameter of the pleats 6 to holes smaller than the outer diameter.

Furthermore, as shown in FIG.
It can also improve flexibility. Note that if the head 5 is provided with a groove 11 and the sealant lO is interposed in this groove, positioning when applying the sealant can be facilitated and the amount of application can be quantified.

In addition, in the above example, an example of a grommet that is inserted into a hole for draining water or electrodeposited paint is shown, but it can also be used as a grommet for penetrating wire harnesses, tubes, hoses, cables, etc. The present invention can also be applied. In this case, it is necessary to provide a through hole in the center of the head 5 of each of the above embodiments.

〔Effect of the invention〕

As is clear from the above, according to the present invention, by providing the pleats having connection pleats t on the outer periphery of the grommet, 4! This can be achieved by attaching one grommet to a hole having a size of r types and a plate thickness within a predetermined thickness range.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a conventional grommet, FIGS. 2(a) and (b) are a sectional view and bottom view showing a first embodiment of the present invention, and FIG. 3 is an implementation of the method shown in FIG. FIG. 4 is a sectional view showing an example in which the embodiment shown in FIG. 2 is installed in a place with a different plate thickness. FIG. It is. 5...Head, 6...Folds, 7...Shaft, 8...
・Folds, lO...Sealant, 11...Groove. Agent Tatsuyuki Unuma (and 1 other person) Figure 1 Figure 2 (a) Figure 3 Figure 2 (b) Figure 4 Figure 5

Claims (2)

[Claims] (1) In a grommet that closes a hole provided in a plate material or is provided in a hole and allows a member to pass through the inside,
A head portion formed to have a predetermined shape and thickness, and a flap portion integrally formed on one side of the head portion with a plurality of folds having a predetermined outer shape arranged in cascade at predetermined intervals. A grommet characterized by: (2) A grommet that closes a hole provided in a plate material or is provided in a hole and allows a member to pass through the inside, with a head formed in a predetermined shape and thickness, and a predetermined outer shape at predetermined intervals. The present invention is characterized by comprising: a pleat portion integrally formed on one of the head parts with a plurality of folds arranged in series, and a sealant applied between the head head and the plate material. grommet.