JPH10255572A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the work of fitting a grommet main body and a lock member together and surely prevent their separation. SOLUTION: This grommet 1 is formed by joining a circumferential wall 13 to one of the outer edges of a base 11 taking the form of a hollow disk, providing an inwardly projecting support wall 14 at the end of the circumferential wall 13, forming a fitting recess inside it, and fitting into the support wall 14 a soft grommet main body 10 which is provided with an inner peripheral lip 16 and an outer periphery lip 17 on its peripheries, a base 33 which is fitted into the fitting recess, and a hard resinous grommet 30 which has a locking piece 34 locked into a panel hole formed in the panel of a vehicle, etc. Between the inner edge of the support wall 14 and the inner peripheral lip 16, an engaging projection 18 is placed upright in a position where it does not interfere with the locking piece 24 and the panel. The projected length of the engaging projection 18 is set to be greater than the distance between the base 33 and the panel when the grommet main body 10 is fitted over the lock member 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet formed by fitting a soft grommet body and a hard resin lock member.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
A grommet disclosed in Japanese Patent No. 6186 is proposed. In FIG. 5, the grommet 50 includes a soft grommet main body 51 and a hard resin lock member 52. The grommet main body 51 is provided with a peripheral wall 54 provided around the base 53, a support wall 55 projecting inward at an end of the peripheral wall 54, and a waterproof lip 56 provided around the support wall 55. And the base 53, the peripheral wall 5
4 and the support wall 55 form a fitting recess 57 (FIG. 6). A curved annular wall 58 is coupled to the substrate 59 on the lock member 52, and a locking piece 58 is provided on the outer peripheral surface of the annular wall 58.
a is provided.

When the board 59 of the lock member 52 is fitted into the fitting recess 57 of the grommet body 51, an engaging rib 60 protruding from the board 59 and an engaging groove 61 formed in the fitting recess 57 are formed. Are engaged. Then, the wire harness 62 is inserted into the grommet 50, and the tube 63 and the wire harness 62 are wound with the tape 64. 65
Is a panel of a vehicle or the like, and 66 is a panel hole formed in the panel 65. The panel hole 66 and the locking piece 58a are engaged.

As shown in FIG. 5, when an external force F ′ acts on the wire harness 62 inserted and fixed in the grommet 50 upward, the peripheral wall 54 of the grommet main body 51 is turned up from the substrate 59 of the lock member 52. In particular, as shown in FIG.
When the wire harness 62 is bent with respect to the grommet 70, the peripheral wall 72 of the grommet main body 71 is easily turned from the lock member 73. That is, the grommet main body 71 and the lock member 73 are easily separated. Therefore, the engagement between the engagement rib (not shown) of the lock member 73 and the engagement groove (not shown) of the grommet main body 71 prevents the grommet main body 71 from being detached from the lock member 73.

However, since the lock member 52 (73) has the engagement rib 60 and the grommet body 51 (71) has the engagement groove 61, the grommet body 51 (7) is provided.
There is a problem that the work of fitting 1) to the lock member 52 (73) becomes difficult.

[0006]

SUMMARY OF THE INVENTION In view of the foregoing, the present invention provides a grommet in which the work of fitting the grommet body and the lock member is easily performed, and the separation between the two is reliably prevented. The purpose is to:

[0007]

In order to achieve the above-mentioned object, according to the present invention, a peripheral wall is continuously provided at one of the outer peripheral edges of a hollow disk-shaped base portion, and is provided at an end of the peripheral wall so as to project inward. A soft grommet main body having a support wall provided with a fitting recess formed therein, and an inner peripheral lip and an outer peripheral lip provided on the support wall, a board fitted into the fitting recess, and a panel of a vehicle or the like. In a grommet formed by fitting a hard resin lock member having a locking piece locked in a formed panel hole, the locking is performed between the inner peripheral edge and the inner peripheral lip of the support wall. A grommet having an engagement projection standing upright at a position where it does not interfere with the piece and the panel (claim 1). A grommet in which the projection length of the engagement projection is set to be larger than the distance between the substrate and the panel when the grommet body and the lock member are fitted is also effective (claim 2).

According to the first aspect, the location of the engagement projection formed on the support wall of the grommet main body is between the inner peripheral edge of the support wall and the inner peripheral lip, and the engagement piece of the lock member and Since the position does not interfere with the panel, the engagement protrusion does not contact the grommet body and the lock member when the grommet body and the lock member are fitted.

According to the second aspect, when the grommet body and the lock member are fitted to each other, the distance of the projecting length of the engagement projection is larger than the distance between the substrate and the panel of the lock member. Since the mating projections are provided, for example, even if an external force acts on the wire harness inserted and fixed to the grommet after the fitting, the engaging projections are not caught between the substrate and the panel.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of a grommet according to the present invention. Note that the same components as those in the conventional example are given the same names, and detailed descriptions thereof are omitted. In FIG. 1, the grommet 1 includes a soft grommet main body 10 and a hard resinous lock member 30.

The grommet body 10 is provided with a tube 12 for inserting the wire harness 2 (see FIG. 3) at one of the inner peripheral edges of a hollow disk-shaped base 11, and a peripheral wall 13 is coupled to the other of the outer peripheral edges of the base 11. A support wall 14 is provided at an end of the peripheral wall 13 so as to protrude inward, and the base 11, the peripheral wall 13, and the support wall 1 are provided.
4 form a fitting recess 15 (FIG. 2),
An inner peripheral lip 16 and an outer peripheral lip 17 are respectively provided around the support wall 14, and four engaging projections 18 are provided on the support wall 14.

The lock member 30 is provided with an annular wall 32 by curving the periphery of a bottom wall 31 having a hole 31a in the center, and a substrate 33 having a hole 33a (see FIG. 3) in the center.
2, a plurality of locking pieces 34 are formed by cutting and raising outward on the outer peripheral surface of the annular wall 32, and a locking step 35 is provided at the tip of the locking piece 34. The grommet 1 is fitted into the panel hole 41 by engaging a panel hole 41 (see FIG. 3) formed in a panel 40 of a vehicle or the like with the locking step portion 35. Reference numeral 36 denotes a U-shaped surrounding wall that surrounds the locking piece 34 from inside the annular wall 32.

The engagement projection 18 is provided on the inner peripheral edge 14a of the support wall 14.
And the inner peripheral lip 16, and is located at a place where it does not interfere with the locking piece 34 of the lock member 30 and the panel hole 41, and is substantially in the same direction as the inner peripheral lip 16 and the outer peripheral lip 17. It is protruding. Also, as shown in FIG.
After the grommet body 10 and the lock member 30 are fitted, the protrusion length A of the engagement protrusion 18 is larger than the distance B between the wall surface 33b of the substrate 33 of the lock member 30 and the wall surface 41b of the panel 40, that is, A > B.

[0014] As shown in FIG.
4, a triangular bottom wall (not shown), an inner peripheral side wall 18a, an outer peripheral side wall 18b, and a connecting wall 18c erected on each side of the bottom wall, and a ceiling wall opposed to the bottom wall 18d. One side of each of the three sides of the bottom wall and the ceiling wall 18d
8 ′, the lower wall and the outer peripheral side wall 18 b are formed in a curved shape having the same curvature as the inner peripheral lip 16, and the connecting wall 1 is formed.
8c is formed so as not to contact the surrounding wall 36.
Accordingly, the engagement protrusion 18 does not interfere with the substrate 33 and the surrounding wall 36, and the grommet main body 10 and the lock member 30 are fitted as in the related art.

As shown in FIG. 3, the substrate 33 of the lock member 30 is fitted into the fitting recess 15 of the grommet body 10,
When the engaging projection 18 is inserted between the annular wall 32 and the support wall 14, the grommet body 10 and the lock member 30 are fitted to form the grommet 1. The wire harness 2 is connected to the bottom wall 31 of the lock member 30 and the holes 31 of the substrate 33.
After being inserted into the tube 12 of the grommet main body 10, the wire harness 2 and the tube 12 are wound with the tape 3. By this. Wire harness 2
Is fixed to the grommet 1. When the grommet 1 is inserted into the panel hole 41 of the panel 40 and the peripheral edge 41a of the panel hole 41 is engaged with the locking step 35 of the locking piece 34, the grommet 1 is fitted into the panel hole 41. You.

After the grommet 1 is fitted into the panel hole 41, as shown in FIG.
When the external force F acts on the wire harness 2 and the wire harness 2 is pulled upward, the relationship of A> B is satisfied.
8 is sandwiched between the wall surface of the panel 40 and the wall surface of the substrate 33 of the lock member 30 and does not come out from between the annular wall 32 and the support wall 14 and functions just as a stopper. This prevents the wire harness 2 from coming out of the grommet 1.

[0017]

As described above, according to the present invention, the engagement protrusion formed on the support wall of the gutmet main body is provided between the inner peripheral edge of the support wall and the inner peripheral lip, and the engagement of the lock member. The grommet main body and the lock member are fitted by a fitting operation similar to the conventional one because the grommet main body and the lock member do not contact the grommet main body and the lock member when the grommet main body and the lock member are fitted. Are combined. Thereby, even if the engagement protrusion is formed on the support wall of the grommet main body, the fitting workability does not become troublesome.

Further, since the distance of the projection length of the engagement protrusion is set to be larger than the distance between the substrate and the panel of the lock member when the grommet body and the lock member are fitted, for example, Even if an external force acts on the wire harness inserted and fixed to the grommet after the engagement, the engaging protrusion is not caught between the substrate and the panel. Thus, the fitting state between the grommet body and the lock member is not released even when an external force acts on the wire harness. Accordingly, the fitting operation between the grommet body and the lock member is easy as in the related art, and the fitted state between the grommet body and the lock member after the fitting is more reliably maintained than before.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of the grommet main body taken along line SS in FIG.

FIG. 3 is a cross-sectional view showing a state where a wire harness is inserted and fixed to the grommet of FIG. 1;

FIG. 4 is a sectional view showing a state where an external force acts on the wire harness in FIG. 3;

FIG. 5 is a cross-sectional view showing a conventional grommet.

FIG. 6 is a sectional view showing a state where an external force acts on the wire harness in FIG. 5;

FIG. 7 is a side view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grommet 10 Grommet main body 11 Base 13 Peripheral wall 14 Support wall 15 Fitting recess 16 Inner peripheral lip 17 Outer peripheral lip 18 Engagement protrusion 30 Lock member 33 Substrate 34 Locking piece 40 Panel 41 Panel hole

Claims (2)

[Claims] 1. A peripheral wall is continuously provided on one of the outer peripheral edges of a hollow disk-shaped base portion, and a support wall projecting inward is provided at an end portion of the peripheral wall to form a fitting concave portion therein, and the supporting wall is formed. A hard grommet body having a soft grommet body surrounding a wall with an inner lip and an outer lip, a board fitted into the fitting recess, and a locking piece locked in a panel hole formed in a panel of a vehicle or the like. In the grommet formed by fitting the resin lock member of the above, an engagement projection is provided upright between the inner peripheral edge and the inner peripheral lip of the support wall at a position that does not interfere with the locking piece and the panel. A grommet characterized by that. 2. A projection length of the engagement projection is set to be larger than a distance between the substrate and the panel when the grommet body and the lock member are fitted. The grommet according to 1.