JPH0527688Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a cap-combined grommet. Regarding a grommet that can be used with a cap for installation.

(Prior art) Conventional grommets are shown in FIGS. 6 and 7, for example.
Like the synthetic resin grommet 1 for attaching a side spoiler shown in the figure, screw holes 5 and 6 are provided in the central part and side wall 4 of the plate-like base 3 of the base 2, respectively.
Further, there is one in which a leg portion 7 is protruded from the back side of the base 3 in a bifurcated shape centered on the axis of the screw hole 5.

And such a grommet 1 has its legs 7
into the mounting hole 9 of the body panel 8, and
After screwing in the screw 10 with a larger diameter and elastically expanding the leg portion 7 to prevent it from coming out, the spoiler 11 is screwed in using the screw hole 6.
was screwed on.

(Problem to be Solved by the Invention) However, when the grommet 1 described above is used, when the leg portion 7 is press-fitted into the mounting hole 9, the coating film 12 formed on the body panel 8 is attached to the periphery of the mounting hole 9. There was a problem in that the body panel 8 rubbed against the part 7 and peeled off, causing the body panel 8 to rust.

By the way, in order to solve the above-mentioned problem, a protrusion is made to protrude from the leg part 7 of the grommet 1, and a cap for protecting the mounting hole that can be inserted onto the leg part 7 by means of the protrusion (for example, see Japanese Utility Model Publication No. 62-34018). ) can be considered as a countermeasure to prevent peeling of the coating film 12 by press-fitting the leg portion 7 into the mounting hole 9 in a state in which the leg portion 7 is temporarily attached.

In this case, considering the moldability of the protrusion, the ease of assembling with the cap, and the support strength for the temporarily attached cap, etc., it is considered that By setting up
It is desirable that the aforementioned projection protrudes from this connecting portion along the center line of the grommet 1. However, with this configuration, when the screw 10 is inserted through the screw hole 5, the bifurcated leg portion 7 cannot be fully expanded because it is connected by the connecting portion. Grommet 1 from panel 8
This results in a new problem in that the detachment load of the spoiler 11 becomes smaller and the attached spoiler 11 becomes more likely to fall off.

Therefore, the present invention is a grommet for securing automotive parts that is equipped with bifurcated legs for fitting into mounting holes in body panels, and is supported by a connecting portion that connects the tips of the bifurcated legs. The technical problem to be solved is to provide a protrusion for temporarily attaching a cap and to prevent the connecting part from interfering with the expansion of the bifurcated leg part.

(Means for solving the problem) The technical means for solving the above problem is to insert a bifurcated structure into the mounting hole of the body panel from the back side of the base to which the automotive decorative parts are fixed. A grommet with protruding legs and a screw inserted through a screw hole provided in the base to expand the bifurcated legs, the grommet connecting the tips of the bifurcated legs. At least one of the connection parts between the connection part and the tip of the leg part is provided with a notch part that is easy to cut when the leg part is expanded, and from the connection part, the attachment part A protrusion is protruded for attaching the protective cap of the hole to the bifurcated leg at a temporary attaching position.

(Function) A cap is first attached to the protrusion of the grommet, an automotive decorative part is fixed to the base of the grommet, and then the leg is inserted into the mounting hole of the body panel.
At this time, the paint film on the body panel is protected by the cap and does not peel off.

Next, a screw is inserted through the screw hole in the base, and the bifurcated legs are elastically expanded to prevent it from coming off. At this time, since the connecting portion connecting the tips of the bifurcated legs is cut at the connecting portion, it does not interfere with the expansion of the legs.

(Example) Next, an example of the present invention will be described based on FIGS. 1 to 4.

Grommet 13 for attaching the side spoiler is an integrally molded product made of synthetic resin. This grommet 13
In the plate-shaped base 15 of the base 14, a vertically oriented screw hole 16 is provided in the center. Further, a side wall 17 is provided upright along the peripheral edge of the base 15, and a horizontal screw hole 18 is provided in the thick wall portion on the rear side (the back left side in FIG. 1) of the side wall 17.

On the back side of the base 15, a bifurcated leg portion 20 is formed by a pair of legs 19 that protrude symmetrically with respect to the axis of the screw hole 16 at a predetermined distance from each other. ing. Each of the legs 19 is provided with a bulge 21 on the outside to prevent it from coming off, and can be elastically expanded outward by applying an external force.

The distal ends of the pair of legs 19 are integrally connected by a supporting connecting part 22 formed like a bridge between these distal ends, and the connecting part 22 and one leg 19 are connected together. The connecting portion is made thin by providing a notch 23.

From the connecting part 22, the center line of the grommet 13,
That is, a rod-shaped projection 24 is projected along the axis of the vertically oriented screw hole 16. A flange 25 with a relatively large diameter and a flange 26 with a relatively small diameter are formed in two stages at the tip of the projection 24.

This embodiment is constructed as described above and is used as follows.

That is, as shown in FIG. 2, first, a grommet mounting screw 27 having a larger diameter than the vertically oriented screw hole 16 is temporarily attached in a slightly screwed state. Next, sealing material 28 made of a suitable material
is attached to the back surface of the base 15 with its insertion hole 29 (see FIG. 1) fitted into the leg 20.

Next, the first layer is made of a slightly soft synthetic resin material.
As shown in the figure, a bag-shaped cap 31 having a flange 30 at its opening is first attached to a temporary attachment position as shown in FIG. This step is carried out by fitting a temporary attachment hole 32 provided at the center of the bottom of the cap 31 into a portion of the protrusion 24 between the two flanges 25 and 26. Note that the protrusion 24 is connected to the grommet 1.
3, and the hole 32 is also provided at the center of the bottom of the cap 31, so that the two can be easily aligned and temporarily attached quickly.

Next, grommet 13 is the body panel 3 of the car.
3. In this step, as shown in FIG. 2, after the flange 30 of the temporarily attached cap 31 is locked into the mounting hole 34 provided in the body panel, the leg portion 20 is pushed into the inside of the cap 31. As shown in FIG. 3, it is inserted to the back side of the body panel 33. At this time, since the cap 31 is fixed in the attachment hole 34, the inserted leg portion 20 does not rub against the peripheral edge of the attachment hole 34, so the coating film 35 in this area does not peel off.

After the legs 20 are inserted in this manner, when the grommet mounting screw 27 is screwed into the screw hole 16, the pair of legs 19 are elastically expanded outward by the screws 27, and the bulging portion 21 is expanded. It is locked into the mounting hole 34 from the back side. This prevents the leg portion 20 from coming off from the body panel 33.

Moreover, since the notch portion 23 is cut when the screw 27 is inserted, the connecting portion 22 does not interfere with the expansion of the leg 19. Therefore, since the legs 19 can be expanded sufficiently, the bulging portion 21 is deeply engaged in the mounting hole 34, and the load for separating the grommet 13 from the body panel 33 becomes large.

After going through the above steps, the hollow part 37 of the spoiler 36 is finally fitted into the grommet 13 as shown in FIG. By screwing in the spoiler 38, the installation of the spoiler 36 is completed.

In this embodiment, the notch 23 may be of any direction or depth as long as it is formed so that it can be easily cut when the grommet mounting screw 27 is screwed in. In addition, notches 2 are provided at both of the two connecting portions between the connecting portion 22 and the pair of legs 19.
3 may be provided.

Furthermore, when the grommet 13 is for attaching the molding 39 as shown in FIG. 5, instead of using the screw 38 for fixing the spoiler,
4 may be provided with protrusions 41 that can engage the flanges 40 at both ends of the molding 39, respectively.

(Effects of the invention) The present invention can prevent rusting of the body panel due to peeling of the paint film at the mounting hole of the body panel by attaching the cap first at the temporary attachment position.
In addition, by preventing the connection part with a protrusion required for attaching the cap from interfering with the expansion of the leg part, the load for separating the grommet from the body panel is kept large, thereby reducing the weight of the automotive decorative parts. Falling off can be effectively prevented.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure shows the state in which the cap is attached first (the body panel is shown in cross section), Figure 3 is a cross-sectional view showing the state in which the legs are inserted into the body panel, and Figure 4 shows the state in which the spoiler is attached to the body panel. Cross-sectional view shown, No. 5
The figure is a front view showing another embodiment of the present invention, FIG. 6 is a perspective view of a conventional example, and FIG. 7 is a sectional view showing its usage. 13...grommet, 14...base, 16...
Screw hole, 20... Leg portion, 22... Connection portion, 23...
...Notch, 24...Protrusion, 31...Cap.

Claims (1)

[Claims for Utility Model Registration] A bifurcated leg protruding from the back side of a base to which a decorative part for an automobile is attached, for engaging in a mounting hole of a body panel, and a screw hole provided in the base. A grommet whose bifurcated leg portions are expanded by a screw that is screwed in, the tips of the bifurcated leg portions being integrally connected by a connecting portion, and the connecting portion and the leg portions being integrally connected. At least one of the connecting parts with the tip is provided with a notch that can be easily cut when the leg part is expanded, and from the connecting part, the protective cap of the mounting hole is attached to the bifurcated leg part. A grommet that can be used with a cap, characterized by a protruding protrusion for pre-attachment at the temporary attachment position.