JP2001327049A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grommet that can simplify wiring works. SOLUTION: The grommet 10 comprises a conical, cylindrical body 20, a groove portion 21 that is formed on the outer periphery of the body 20 and can be fit onto a mounting hole 12 formed in a body panel 11, and an annular acoustic insulating portion 22 that is formed on the periphery of the body 20 and can be brought into tight contact with the surface of a soundproofing material 14. The acoustic insulating portion 22 is positioned between the groove portion 21 and the smaller-diameter end potion of the body 20, and can be deformed, toward the groove portion 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a grommet,
For example, the present invention relates to a grommet for penetrating and holding a long member such as a wire harness on a mounting plate such as a vehicle body panel on which a soundproofing material is laminated.

[0002]

2. Description of the Related Art Conventionally, a grommet for arranging a wire harness so as to penetrate a vehicle body panel defining an engine room and a vehicle compartment of an automobile has a cylindrical main body for gripping the wire harness. A groove provided on the outer surface of the main body is fitted into a through hole provided in the vehicle body panel. Furthermore, the present applicant has proposed a grommet in which a main body is formed in a substantially conical cylindrical shape and a flange-shaped lip is provided at a large diameter end of the main body in order to improve quietness in a vehicle cabin. (See Japanese Patent Application Laid-Open No. 11-150837: Conventional Example). According to this conventional example, at the same time that the groove of the main body fits into the through hole, the edge of the lip can be in close contact with the soundproof material laminated on the vehicle body panel, so that the quietness in the interior of the vehicle can be drastically improved. This is an extremely excellent effect.

[0003]

In the prior art described above, for the purpose of wiring, after the wire harness is gripped on the main body, the large-diameter end of the main body is pushed from the engine room into the vehicle compartment. Thus, the small-diameter end of the main body is placed in the vehicle interior, and then the wire harness is pulled from the engine room, whereby the small-diameter end is drawn back into the through hole, and the conical surface of the main body is slid into contact with the opening edge of the through hole. While fitting the groove to the opening edge of the through hole, the lip is brought into close contact with the surface of the soundproofing material.

[0004] That is, in the above-mentioned conventional example, when the wire harness is routed, the push-in operation and the pull-in operation need to be performed in order, so that the operation becomes complicated, and there is a need for improvement. The present invention has been made to satisfy the above-mentioned demands, and an object of the present invention is to provide a grommet that can simplify a wiring operation.

[0005]

In order to achieve the above-mentioned object, according to the present invention, as described in claim 1, a mounting hole formed in a mounting plate and a soundproof material laminated on the mounting plate are provided. In order to hold the long member through the through hole,
A conical cylindrical main body, a groove provided on the outer peripheral surface of the main body and capable of fitting to the opening edge of the mounting hole, and an annular shape provided on the outer peripheral surface of the main body and capable of closely adhering to the surface of the soundproofing material A grommet comprising:
It is provided on the small-diameter end side of the main body with respect to the groove, and is deformable toward the groove.

In the grommet constructed as described above, the soundproof portion provided on the small-diameter end of the main body can be deformed toward the groove, so that after the wire harness is gripped on the main body, the small-diameter of the main body is reduced. If the end is pushed into the mounting hole from the engine room to the cabin, the soundproofing portion is deformed toward the groove by the opening edge of the mounting hole, and the soundproofing portion is fitted when the groove is fitted to the opening edge of the mounting hole. Will return to the initial shape and come into close contact with the surface of the soundproofing material. In other words, in such a grommet, since the wiring work is completed only by pushing the small-diameter end of the main body from the engine room toward the vehicle compartment, it is necessary to perform the conventional pushing work and the drawing work in order. Can be eliminated, thereby achieving the above-mentioned object.

Further, according to the present invention, a concave storage portion capable of storing the soundproof portion is provided between the groove portion on the outer peripheral surface of the main body and a base portion of the soundproof portion. It is characterized by having. In such a grommet, since the soundproof part is stored in the storage part, if the shape, dimensions, etc. of the storage part are appropriately selected in advance,
On the peripheral surface of the main body which is slidably contacted with the opening edge of the mounting hole, the deformed soundproof portion does not hinder the sliding contact, and the pushing work of the main body can be performed smoothly.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, a grommet 10 according to an embodiment of the present invention includes a wire harness provided in a mounting hole 12 provided in a vehicle body panel 11 in order to dispose the wire harness so as to penetrate a vehicle body panel 11. Can be fitted in a state where is inserted and held. The mounting hole 12 has a circular shape, and a flange 13 having a predetermined height is formed along the opening edge.

The body panel 11 is provided with a soundproofing material 14 along a side surface of the vehicle compartment (right side in FIG. 1) in order to cut off noise and the like in an engine room (left side in FIG. 1). Soundproofing material
Reference numeral 14 denotes glass wool having a predetermined thickness, for example, and a through hole 15 coaxial with the mounting hole 12 is formed along the thickness direction. The through-hole 15 is a tapered hole that expands toward the vehicle body panel 11, and the small-diameter dimension corresponds to the mounting hole 12.

The grommet 10 includes a main body 20 having a conical cylindrical shape,
A groove 21 provided on the outer peripheral surface of the main body 20 and capable of fitting to the opening edge of the mounting hole 12; and a soundproofing material 14 provided on the outer peripheral surface of the main body 20.
And a soundproof part 22 which can be in close contact with the surface of the sound source. The main body 20 includes a stepped cylindrical first gripping portion 23 coaxially connected to the small diameter end of the main body 20 and a stepped cylindrical second gripping portion 24 provided inside the main body 20. It has.

The first gripping portion 23 is provided with a large number of annular ribs 23A along the inner peripheral surface. On the other hand, the second gripper 24
Are coaxially connected via a large diameter portion 24A and a conical portion 24B via a small diameter portion 24C, and are provided with a large number of annular ribs 24D along the inner peripheral surface of the small diameter portion 24C. The large-diameter end of the conical portion 24B is the main body of the second gripping portion 24.
The small diameter portion 24C is connected to the small diameter end of the conical portion 24B. Therefore, the second gripping portion 24 can be extended and contracted in the axial direction while reversing the conical portion 24B, and the large-diameter portion 24A
And the axis of the small diameter portion 24C can be moved so as to be parallel or relatively intersect.

The groove 21 has a substantially U-shaped cross section in which the flange 13 of the mounting hole 12 can be fitted. The groove 21 has a large diameter end (left side in FIG. 1) on the outer peripheral surface of the main body 20. It is formed continuously along the direction. The soundproof portion 22 is formed in an annular shape having a predetermined thickness, is provided on the small-diameter end portion side (the right side in FIG. 1) of the main body 20 with respect to the groove portion 21, and has an end face 22A facing the small-diameter end portion side of the main body 20. It has a conical surface. End face of soundproof part 22
A plurality of ribs continuous in the circumferential direction are provided on 22A concentrically.

The soundproof section 22 is deformable toward the groove 21 and can be stored in a concave storage section 26 provided between the soundproof section 22 and the groove 21. The storage section 26 has a cross-sectional shape corresponding to the deformed soundproof section 22, and accommodates the deformed soundproof section 22 so that the soundproof section 22 does not protrude from the generatrix of the main body 20.

Next, a procedure for arranging a wire harness using the grommet 10 thus processed will be described. The wire harness is passed through the first gripping portion 23 and the second gripping portion 24 in advance, and a predetermined filler is filled in the first gripping portion 23 and the small diameter portion 24C of the second gripping portion 24. Let it solidify. Next, as shown in FIG. 2, the small-diameter end portion of the main body 20 is pushed into the mounting hole 12 from the engine room toward the vehicle compartment with the first gripping portion 23 as a front end, so that the opening edge of the mounting hole 12 is formed. Then, the outer peripheral surface of the main body 20 is brought into sliding contact, and then the soundproof portion 22 is deformed toward the groove portion 21 by the opening edge of the mounting hole 12 and is housed in the housing portion 26. At this time, since the plurality of ribs 25 are provided on the end face 22A of the soundproof portion 22,
The sliding contact resistance of the opening edge of the mounting hole 12 with respect to the end surface 22A can be reduced.

Then, the main body 20 is further pushed into the vehicle compartment, so that the groove 21 is fitted to the opening edge of the mounting hole 12. At this time, the soundproof portion 22 returns to the initial shape while deforming the edge of the through hole 15 in the soundproof material 14 because the sliding contact with the opening edge of the hard mounting hole 12 is released,
As a result, the sound-insulating material 14 comes into close contact with the surface.

According to the grommet 10 described above, since the soundproof part 22 provided on the small diameter end of the main body 20 can be deformed toward the groove 21, the small diameter end of the main body 20 is moved from the engine room to the vehicle compartment. Into the mounting hole 12 and insert the groove 21 into the mounting hole.
The fitting work is completed by fitting the soundproof part 22 that has returned to the initial shape to the surface of the soundproofing material 14 while fitting the soundproof part 22 that has returned to the initial shape together with the opening edge of 12, so that the conventional pushing work and pulling work can be performed. It is possible to eliminate the necessity of performing in order. In particular, according to the grommet 10, the soundproofing section 22 is provided with the storage section 26 during the pushing operation.
Therefore, the soundproof portion 22 is not obstructed in sliding contact, and the pushing operation of the main body 20 can be performed smoothly.

According to the grommet 10 described above, since the plurality of ribs 25 are provided on the end surface 22A of the soundproof portion 22,
The sliding contact resistance of the mounting hole 12 with respect to the opening edge can be reduced, whereby the pushing work of the main body 20 can be saved.

The grommet of the present invention is not limited to the above-described embodiment, but can be appropriately modified and improved. The mounting plate, the mounting hole, the soundproof material, The material, shape, size, form, number, location, and the like of the through hole, the main body, the groove, the soundproof portion, the storage portion, the rib, and the like are arbitrary and are not limited as long as the present invention can be achieved.

[0019]

As described above, according to the present invention, as described in claim 1, the soundproof portion provided on the small diameter end side of the main body can be deformed toward the groove.
By simply pushing the small-diameter end of the main body from the engine room toward the cabin, the wiring work is completed, and the wiring work can be simplified as compared with the conventional case.

Further, according to the present invention, as described in claim 2, since the soundproof portion is housed in the housing portion, the deformed soundproof portion slides against the opening edge of the mounting hole. The work of pushing the main body can be performed smoothly without obstruction.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment according to the present invention.

FIG. 2 is a sectional view showing the operation of the present invention.

[Explanation of symbols]

 10 Grommet 11 Body panel (mounting plate) 12 Mounting hole 14 Soundproof material 15 Through hole 20 Main unit 21 Groove 22 Soundproof part 25 Rib 26 Storage part

Claims (2)

[Claims] 1. A conical cylindrical main body and an outer periphery of the main body for holding a long member through a mounting hole formed in a mounting plate and a through hole formed in a soundproof material laminated on the mounting plate. A grommet having a groove portion provided on a surface and capable of fitting to an opening edge of the mounting hole, and an annular soundproof portion provided on an outer peripheral surface of the main body and capable of closely adhering to a surface of the soundproof material, A grommet, wherein the soundproof portion is provided closer to a small-diameter end portion of the main body than the groove portion and is deformable toward the groove portion. 2. The grommet according to claim 1, wherein a concave storage portion capable of storing the soundproof portion is provided between the groove portion and the soundproof portion on the outer peripheral surface of the main body.