JPH0724901Y2 - Grommet - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) This invention discloses that when a wire harness or the like is inserted into a hole of a panel, water or the like enters the panel through a gap between the hole and the wire harness or the like. More specifically, the present invention relates to a grommet having a two-part structure that can be easily fitted into a hole of a panel.

(Prior Art) Conventionally, as this type of grommet, it is known that the whole is made of a rubber material, but the rubber material is deteriorated due to long-term use and is easily detached from the panel, and when mating. Has a large friction resistance, and there is a problem that the fitting property to the panel is poor.

For this reason, the grommet is divided into two parts, and the part that fits into the hole of the panel is made of hard synthetic resin so that it will not come off easily from the panel and the fitability to the panel will be improved. Have been proposed (for example,
59-155783).

FIG. 7 shows this two-part grommet.
According to this, the hard grommet body A made of a hard synthetic resin and the soft grommet B made of rubber or the like are combined.

Here, in the hard grommet body A, a peripheral wall 52 having a large radius is formed in a peripheral portion of a bottom wall 51 having an insertion hole 50, and a circular substrate 53 is fixed to an upper end of the peripheral wall 52. It is configured.

The soft grommet B connects the wire insertion tube 61 and the wire tightening portion 62 to the central portion of the upper surface of the base 60, and
A waterproof structure portion 65 composed of an outer peripheral lip 63 and an inner peripheral lip 64 is provided on the periphery of the bottom portion of 60. The ring-shaped substrate 53 of the hard grommet body A is the base portion 60 of the soft grommet B.
It is formed so as to fit into the fitting recess 66 formed on the bottom surface of the. A hole is formed in the peripheral wall 52 of the hard grommet A.
54, 54 are formed, and a locking piece 56 having a locking step 55 is formed in the hole 54, 54.

When fixing the grommet to the panel P, the cable C is inserted through the grommet in advance and the tape T is wound around, and in this state, the bottom wall 51 of the hard grommet main body A is brought into contact with the hole H of the panel P. Push it in. This allows
While the peripheral wall 52 is fitted in the hole H, the locking piece 56 is bent inward of the peripheral wall 52, and when the locking step portion 55 reaches the panel P, the locking piece 56 is restored by the restoring elastic force. Then, the locking step 55 is locked to the inner peripheral edge of the hole H.

(Problems to be solved by the invention) However, in the above grommet, in order to reduce the frictional resistance at the time of fitting so that the hard grommet main body A can be easily fitted into the hole H, the bottom wall 51 to the peripheral wall 52 are covered. Although a large radius (see FIG. 8) is formed, as shown in FIG. 9, the hard grommet main body A may slip on the edge of the hole H and may be displaced. Therefore, as shown in FIG. 10, the grommet must be vertically erected with respect to the panel P, and the grommet must be positioned and fitted so that its center is located on the center of the hole H. Therefore, there is a problem that the fitting work is troublesome.

The present invention solves the above-mentioned problems of the prior art, and an object thereof is to provide a grommet that can be easily fitted without causing a positional deviation when fitting into a hole of a panel. is there.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, a two-part configuration including a hard grommet main body fitted in the hole of the panel and a soft grommet combined with the hard grommet main body In the grommet, at the boundary position between the bottom wall and the rounded peripheral wall of the hard grommet body, while protruding from the bottom wall, its outer surface is slightly inclined inward, and at the inner peripheral edge of the hole of the panel. It is characterized in that a positioning member that abuts is provided.

(Operation) In order to fit the grommet into the hole of the panel, the bottom wall of the grommet is brought into contact with the hole of the panel and pushed in. At this time, the positioning member protruding from the bottom wall comes into contact with the inner peripheral edge of the hole. The hard grommet body is positioned with respect to the hole, and the hard grommet body fits into the hole while being guided by the positioning member.

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

1 to 3 show an example of the grommet of the present invention, in which reference numeral 1 is a hard grommet body made of hard synthetic resin, and 2 is a soft grommet made of rubber or the like.

As shown in FIG. 2, the hard grommet main body 1 has a peripheral wall 4 having a large radius, a peripheral wall 4 having a curved cross-section, and a ring-shaped substrate 7 at the upper end of the peripheral wall 4 having an insertion hole 6. It is fixedly configured, but the important thing here is that
A pair of positioning members 5, 5 are projected from the bottom wall 3 at the boundary position between the bottom wall 3 and the peripheral wall 4 and face each other.
Is provided. These positioning members 5, 5
Is formed in a tongue shape having a height of 10 mm and a width of 10 mm, for example, and its outer surface is tapered inwardly by a few degrees (see FIGS. 4 and 5).

Therefore, when the hard grommet body 1 is fitted into the hole 19 of the panel 18, first, the outer surfaces of the tips of the positioning members 5 and 5 are brought into contact with the inner peripheral edge of the hole 19, as shown in FIG. Therefore, even if the hard grommet body 1 is slightly inclined, the hard grommet body 1 is reliably positioned. Further, since the outer surfaces of the positioning members 5 and 5 are formed in a tapered shape, the contact with the inner peripheral edge of the hole 19 can be smoothly performed, and when the fitting into the hole 19 is performed subsequently, the smoothness is similarly achieved. Can be done.

The positioning members 5 and 5 are not limited to the tongue-shaped members described above, and may be formed, for example, in an annular shape or in a truncated cone shape (conical truncated cone shape). , Hole
The positioning of the hard grommet main body 1 is made easier with the positioning member 5 being more stable.
I will guide you inside.

A plurality of holes 8 are formed in the peripheral wall 4 of the hard grommet body 1 at appropriate intervals, and locking pieces 10 each having a locking step portion 9 are slightly projected from the outer peripheral surface of the peripheral wall 4 in the holes 8. However, this point is the same as the conventional one shown in FIG. 7. As shown in FIG. 3, the soft grommet 2 connects the tube 12 and the wire tightening portion 13 to the central portion of the upper surface of the base portion 11, and the outer peripheral lip 14 and the inner peripheral lip 15 on the bottom peripheral edge of the base portion 11. The waterproof structure 16 is formed to have a funnel shape as a whole, but this point is also the same as the conventional one. Further, the fitting recess 17 is formed on the bottom surface of the base portion 11 of the soft grommet 2, and the annular substrate 7 of the hard grommet body 1 is fitted in the fitting recess 17 as in the conventional case. .

When fixing the grommet to the panel 18, the tape 21 is wound around the insertion hole 6, the tube 12, and the wire tightening portion 13 through the cable 20, and the annular substrate 7 is fitted in the fitting recess 17 in advance. Then, the bottom wall 3 of the hard grommet body 1 is brought into contact with the hole 19 of the panel 18 and pushed in. At this time, first, the outer surfaces of the tips of the positioning members 5, 5 come into contact with the inner peripheral edge of the hole 19 and the hard grommet body 1 is pushed. Is positioned with respect to the hole 19 (see FIG. 6). Next, the outer surfaces of the positioning members 5 and 5 are brought into sliding contact with the inner peripheral surface of the hole 19 to guide the hard grommet main body 1, and the peripheral wall 4 is fitted in the hole 19, while the locking piece 10 is arranged on the inner peripheral surface of the hole 19. When the locking step portion 9 is pushed inward by the surface and the locking step portion 9 reaches the panel 18, the locking piece 10 is restored by the restoring elastic force, and the locking step portion 9 engages with the inner peripheral edge of the hole 19. Stop.

Therefore, even if there is a large radius from the bottom wall 3 to the peripheral wall 4 of the hard grommet body 1, there is no problem that the hard grommet body 1 slips on the edge of the hole 19, and the hard grommet body 1 is slightly tilted. Also, the hard grommet body 1 can be surely positioned and smoothly fitted into the hole 19.

The hard grommet body 1 is completely prevented from coming off the panel 18 by the locking step 9 and the inner peripheral edge of the hole 19.
Further, since the outer peripheral lip 14 and the inner peripheral lip 15 are pressed against the upper surface of the panel 18, the gap between the grommet and the hole 19 is sealed, and water is completely prevented from entering the panel 18.

The structure of the grommet is not limited to that of the above embodiment.

The grommet can be widely applied as long as it is a two-part grommet including the hard grommet main body 1 fitted in the hole 19 of the panel 18 and the soft grommet 2 combined with the hard grommet main body 1.

(Effects of the Invention) As described above, according to the present invention, at the boundary position between the bottom wall of the hard grommet body and the rounded peripheral wall, the outside surface of the hard grommet body is slightly inclined inward while protruding from the bottom wall. Since the positioning member that abuts the inner peripheral edge of the hole of the panel is provided, there is no problem that the hard grommet body slips on the edge of the hole during the fitting work into the hole of the panel, and the hard grommet body Even if is slightly inclined, it is possible to surely position and smoothly fit into the hole. Therefore, the hard grommet body can be prevented from being displaced with respect to the hole, and the fitting work can be easily performed.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention,
FIG. 1 is an overall sectional view, FIG. 2 is a sectional view of a hard grommet main body, FIG. 3 is a sectional view of a soft grommet, and FIG. 4 is a reverse view of the hard grommet main body with its bottom wall facing upward. FIG. 5 is an explanatory view showing that the outer surface of the positioning member is formed in a tapered shape, FIG. 6 is an explanatory view at the time of fitting work, and FIGS. 7 to 10 are conventional drawings. Fig. 7 shows the technique, Fig. 7 is an overall cross-sectional view, Fig. 8 is a cross-sectional view of a hard grommet body, Fig. 9 is an explanatory view for explaining a state in which the hard grommet body slides on the edge of the hole, and Fig. 10 is a hard figure. It is explanatory drawing for preventing a grommet main body from slipping on the edge of a hole. 1 ... Hard grommet body 2 ... Soft grommet 3 ... Bottom wall 5 ... Positioning member 18 ... Panel, 19 ... Hole

Claims (1)

[Scope of utility model registration request] 1. A two-part grommet comprising a hard grommet body fitted in a hole of a panel and a soft grommet combined with the hard grommet body.
A positioning member that protrudes from the bottom wall at the boundary position between the bottom wall of the hard grommet body and the rounded peripheral wall, and the outer surface of the hard grommet body inclines slightly inward and contacts the inner peripheral edge of the hole of the panel. A grommet characterized by being provided with.