JP3475896B2 - Grommet and mounting method of 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 grommet and a method for mounting a grommet, and more specifically, prevents the mounting hole from coming into contact with the wiring harness when the wiring harness is inserted into the mounting hole of the vehicle body panel. The present invention relates to a grommet that can prevent water and the like from entering the panel through a hole and a method for mounting the grommet.

[0002]

2. Description of the Related Art Generally, when a grommet holding a wire harness is inserted into a mounting hole formed in a panel member for partitioning the exterior and the interior of a vehicle body, the mounting hole and the grommet are prevented from contacting each other and water A grommet is used to prevent the above components from entering the inside of the panel (room) through the gap between the mounting hole and the corrugated pipe.

A conventional grommet of this type is shown in FIGS. 3 and 4, 1
Is a grommet made of rubber or the like, and this grommet 1 has a cylindrical large-diameter portion 2 having an annular groove 2a formed in an outer peripheral portion to be fitted into a mounting hole 4a of a vehicle body panel 4, and the cylindrical large-diameter portion. It is composed of a tubular small diameter portion 3 protruding from the diameter portion 2 and through which the wire harness 5 can be inserted. Further, a tapered portion 2b is formed on the outer peripheral end of the cylindrical large diameter portion 3, and the tapered portion 2b has a function of reducing the insertion force when the cylindrical large diameter portion 2 is inserted into the mounting hole 4a. have.

The grommet 1 having such a structure is
When the tubular large-diameter portion 2 is inserted into the through hole 4a from the right side to the left side in FIG. 4A and then the annular groove 2a is fitted to the vehicle body panel 4, the flange of the tubular large-diameter portion 2 is inserted. By the portion 2c coming into contact with the vehicle body panel 4 on the periphery of the mounting hole 4a,
The mounting hole 4a is sealed.

[0005]

However, in such a grommet 1, in order to insert the cylindrical large diameter portion 2 into the insertion hole 4a with a low insertion force, the cylindrical large diameter portion 2 has a tapered portion 2b. Is provided and the annular groove 2a is located on the back side of the flange portion 2c, it is not possible to visually confirm whether or not the annular groove 2a is securely inserted into the insertion hole 4a. Since the impact cannot be obtained at the moment when the annular groove 2a is fitted into the insertion hole 4a, there is a problem that it cannot be surely confirmed whether or not the annular groove 2a is attached to the insertion hole 4a.

Therefore, an object of the present invention is to provide a grommet and a method for attaching a grommet which can be surely attached to a panel member by easily confirming that the grommet is attached to the panel member. .

[0007]

The invention according to claim 1 is
In order to solve the above-mentioned problems, a cylindrical large-diameter portion having an annular groove formed in an outer peripheral portion to be fitted into a mounting hole of a panel member, and a cylinder protruding from the cylindrical large-diameter portion, into which a wire bundle can be inserted In a grommet composed of a small-diameter portion, the tubular large-diameter portion is a tubular large-diameter portion main body forming the annular groove, and the tubular large-diameter portion main body extends outward from the tubular large-diameter portion main body to form the annular groove. Is divided into a flange portion that comes into contact with the panel member when fitted into the mounting hole, and the tubular large-diameter portion main body and the flange portion are connected via a thin-walled portion to form the tubular large-diameter portion. It is characterized in that the main body and the cylindrical small-diameter portion are connected through a thin portion.

In this case, when the tubular large-diameter portion main body is inserted into the mounting hole and the annular groove is fitted in the mounting hole, the tubular large-diameter portion main body is provided with the thin-walled portion so as to form the annular groove. It moves in the insertion direction of the tubular large-diameter portion main body with respect to the flange portion and the tubular small-diameter portion.

Therefore, it is possible to easily visually confirm that the grommet is attached to the panel member based on the amount of movement of the tubular large-diameter portion main body. As a result,
The grommet can be securely attached to the panel member.

According to a second aspect of the present invention, in order to solve the above-mentioned problems, in the attaching method of attaching the grommet according to the first aspect to the panel member, after inserting the tubular large-diameter portion main body into the attaching hole, When the annular groove is fitted into the mounting hole, the tubular large diameter portion main body is inserted in the insertion direction of the tubular large diameter portion main body with respect to the flange portion and the tubular small diameter portion so as to form the annular groove. It is characterized by moving.

In this case, it is possible to easily visually confirm that the grommet is attached to the panel member based on the amount of movement of the tubular large-diameter portion main body. As a result, the grommet can be securely attached to the panel member.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 are views showing an embodiment of the grommet according to the present invention.

First, the structure will be described. In FIGS. 1 and 2, reference numeral 11 denotes a grommet, and this grommet 11 has a cylindrical large-diameter portion 13 having an annular groove 13a formed in an outer peripheral portion to be fitted into a mounting hole 12a of a vehicle body panel (panel member) 12. A cylindrical small diameter portion 14 that projects from the cylindrical large diameter portion 13 and allows a wire harness (a wire bundle) (not shown) to be inserted therethrough.

Further, the tubular large-diameter portion 13 extends outward from the tubular large-diameter portion main body 15 and the tubular large-diameter portion main body 15, and when the annular groove 13a is fitted into the mounting hole 12a, the panel member 12 is formed. It is divided into a flange 16 that contacts the
The flange portion 16 and the flange portion 16 are connected to each other through a thin portion 17 and face each other to form an annular groove 13a. Further, the tubular large diameter portion 15 and the tubular small diameter portion 14 are connected via the thin portion 18, and the tubular large diameter portion main body 15 includes the tubular small diameter portion 14 and the flange portion.
It is movable with respect to 16.

In the grommet 11 having such a structure, when the tubular large diameter portion main body 15 is inserted into the mounting hole 12a and the annular groove 13a is fitted into the mounting hole 12a, the annular groove 13a is formed.
Thus, the tubular large-diameter portion main body 15 moves in the insertion direction of the tubular large-diameter portion main body 15 with respect to the flange portion 16 and the tubular small-diameter portion 14 via the thin-walled portions 17 and 18. At this time,
As shown in (b), the tubular large-diameter portion main body 15 is flat against the flange portion 16 and the tubular small-diameter portion 14, so that the annular groove
It can be visually confirmed from the outside that 15a is fitted into the mounting hole 12a.

As described above, since it is possible to easily visually confirm that the grommet 11 is attached to the vehicle body panel 12 based on the moving amount of the tubular large-diameter portion main body 15, the grommet 11 can be securely attached to the vehicle body panel 12. Can be installed on.

[0018]

According to the first and second aspects of the present invention, it is possible to easily visually confirm that the grommet is attached to the panel member based on the moving amount of the tubular large diameter portion main body. As a result, the grommet can be securely attached to the panel member.

[Brief description of drawings]

1A and 1B are diagrams showing an embodiment of a grommet and a method of attaching a grommet according to the present invention, wherein FIG. 1A is an external view thereof, and FIG. 1B is a vertical cross-sectional portion of the grommet.

2A is an enlarged cross-sectional view of a portion A of FIG. 1B, FIG.
FIG. 1B is an enlarged cross-sectional view showing a state where the portion A in FIG. 1B is fitted to the vehicle body panel.

FIG. 3 is an external view of a conventional grommet.

FIG. 4A is a vertical sectional view of a conventional grommet, and FIG.
[Fig. 3] is an enlarged cross-sectional view showing a state where part B of Fig. 3A is fitted to a vehicle body panel.

[Explanation of symbols]

11 Grommet 12 Body panel (panel member) 12a Mounting hole 13 Cylindrical large diameter part 13a annular groove 14 Cylindrical small diameter part 15 Tubular large diameter body 16 Flange 17, 18 Thin part

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Claims (2)

(57) [Claims] 1. A cylindrical large-diameter portion having an annular groove formed in an outer peripheral portion to be fitted into a mounting hole of a panel member, and a cylindrical small-diameter portion projecting from the cylindrical large-diameter portion and through which a wire bundle can be inserted. In a grommet configured from, the tubular large-diameter portion, the tubular large-diameter portion main body forming the annular groove, and extending outward from the tubular large-diameter portion main body, the annular groove is the mounting The tubular large-diameter portion main body and the tubular portion are connected to each other through a thin-walled portion while being divided into a flange portion that comes into contact with the panel member when fitted into the hole. Grommet characterized in that the small-diameter portion is connected through a thin portion. 2. A mounting method for mounting the grommet according to claim 1 to the panel member, wherein after inserting the tubular large-diameter portion main body into the mounting hole, when fitting the annular groove into the mounting hole, A method for mounting a grommet, wherein the tubular large-diameter portion main body moves in the insertion direction of the tubular large-diameter portion main body with respect to the flange portion and the tubular small-diameter portion so as to form an annular groove.