JPH0946863A - Soundproof member attached to grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the attaching work efficient by a method wherein a tongue part for fixing to a wiring harness is provided on a soundproof member attached to a grommet. SOLUTION: A soundproof member 11 which is attached to the inside of a grommet 15 mounted on a wiring harness W/H has an outer circumferential shape which can be tightly fitted to the inside of the grommet. A cylindrical foamed material member which has a through-hole 12b through which the wiring harness is inserted at its center and a wiring harness insertion slit 12c which is linked with a part of the through-hole 12b and has its opening on the outer circumferenrial surface and a wiring harness holding member which has an annular plate member 13b which is fixed to one 12a of the end surfaces of the foamed member and a long tongue member 13a which protrudes from a part of the inner circumferential edge of the annular plate member are provided. The wiring harness W/H is fixed to the wiring harness holding member by tape 14 winding or by a band and the wiring harness is inserted through the through-hole of the foamed member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof member attached to a grommet, and more particularly, a wire harness is inserted through a grommet into a through hole formed in a dash panel that separates an engine room side and a vehicle compartment side of an automobile. In the portion where the grommet is attached, the engine vibration noise and the like that penetrates from the mounting portion of the grommet to the vehicle compartment side is effectively suppressed.

[0002]

2. Description of the Related Art Conventionally, in order to prevent the vibration sound of the engine room side from being transmitted into the vehicle compartment through the penetrating portion of this type of grommet, conventionally, a soundproof grommet 5 shown in FIG. 6 is used.
Is provided. (Japanese Utility Model Laid-Open No. 57-15626) The grommet 5 has a small opening 5a having a small diameter through which the wire harness W / H comes in close contact and a wire harness W / H.
And a large opening 5b having an annular recess 5c for locking the dash panel 4 on the outer surface, and a foam shape made of urethane sponge or the like inside the large opening 5b. The sound insulation material 7 is press-fitted.

[0003]

In the above-mentioned conventional example, since the sound insulating material 7 is merely press-fitted and fixed in the grommet 5, the mounting position of the sound insulating material 7 is displaced due to vibration or shock during traveling. However, there are drawbacks such that they may come off or that the pores of the foam made of urethane sponge or the like may be crushed by press fitting and the soundproofing effect may be reduced.

In order to solve this drawback, conventionally, a method of applying an adhesive to the outer peripheral surface of the sound insulating material 7 and fixing the sound insulating material 7 to the grommet 5 has been used. However, in the method using the above adhesive, the sound insulating material 7 is fixed to the grommet 5 with the adhesive, so that the sound insulating material 7 is fixed to the grommet 5.
It is necessary to quickly adjust the position of the sound insulating material 7 at the same time when it is inserted into the inside, and the position of the sound insulating material 7 cannot be adjusted sufficiently, and the problem that the sound insulating material 7 is fixed in a position displaced from the required position occurs. is there. When the sound insulating material 7 is fixed at an incorrect position, the sound insulating material 7 cannot be detached from the grommet 5 and cannot be reattached unless the sound insulating material 7 is destroyed. Further, when an adhesive is used, there is a problem that the adhesive easily sticks to hands, clothes and the like.

The present invention has been made in view of the above problems, and by fixing a soundproof material to a wire harness,
The purpose of the invention is to position and hold the soundproof member and facilitate the work of mounting the soundproof material.

[0006]

In order to achieve the above object, according to the present invention, in claim 1, a soundproof member mounted inside a grommet to be mounted on a wire harness, the outer peripheral shape being tightly fitted inside the grommet. And a cylindrical foamed member having a through hole for inserting a wire harness in the central portion thereof and having a slit for inserting a wire harness which is open to the outer peripheral surface in communication with a part of the through hole, A wire harness holding member having an annular plate portion fixed to one end surface of the foamed member and an elongated tongue portion protruding from a part of an inner peripheral edge of the annular plate portion, the wire harness Provided is a soundproofing member in which a wire harness is fixed to a holding member by tape winding or a band and is attached to a grommet configured to insert the wire harness into a through hole of the foamed member. Than it is.

As described above, since the wire harness holding member of the soundproof member is provided with the long fixing tongue portion, the wire harness is inserted in the through hole of the foamed member. By fixing it with a tape or a band on the tongue extending along the harness,
The soundproof member is fixed to the wire harness. The foam member is provided with a slit for inserting a wire harness, and the slit is spread to insert the wire harness into the through hole. When attaching the soundproofing member to the wire harness, since the wire harness is previously inserted into the grommet and fixed by tape winding, the foamed member of the soundproofing member is placed in a predetermined position in the grommet with respect to the wire harness. And is fixed to the tongue. The grommet thus loaded with the soundproofing member is attached to a dash panel or the like, and the soundproofing member prevents engine vibration noise and the like from passing through the grommet to the passenger compartment side.

The foamed member is made of urethane foam, the wire harness holding member is made of hard rubber, and the tongue has an arcuate cross section. (Claim 2)

As described above, the foamed member is formed of urethane foam, the wire harness holding member is formed of hard rubber, and the sound insulation is achieved by the two layers of the foamed member and the wire harness holding member. It can be improved. Further, since the tongue portion has an arcuate cross-section, it is possible to cope with the wire harness having different outer diameters.

A through hole for inserting a hose cable is provided in a part of the foamed member and the wire harness holding member. (Claim 3)

Since the through hole for inserting the hose cable is provided as described above, the wire harness and the hose cable can be inserted into the through hole formed in the dash panel or the like with one grommet. It is possible to prevent the vibration sound from penetrating from the portion where the hose cable is inserted.

[0012]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the embodiments of the invention shown in the drawings. 1 to 3
Indicates a soundproof member 11 attached to the grommet, and in the soundproof member 11, one end surface 12 of the cylindrical foam member 12 is
A wire harness holding member 13 having a long tongue portion 13a is fixed to a, the wire harness W / H is placed on the tongue portion 13a, and a tape 14 is wound around the soundproof member 1
1 is fixed to the wire harness W / H.

The foamed member 12 is made of urethane foam and has a through hole 12b for inserting a wire harness formed at the center thereof and a slit 12c communicating with a part of the through hole 12b and opening to the outer peripheral surface. Has been done.

The wire harness holding member 13 is made of hard rubber, and has an annular plate portion 13b fixed to the one end surface 12a of the foam member 12, and the tongue protruding from a part of the inner peripheral edge of the annular plate portion 13b. And a part 13a. Annular plate 13b
Has the same shape as the end surface 12a of the foamed member 12, the outer peripheral surface and the inner peripheral surface are continuous with the outer peripheral surface and the inner peripheral surface of the foamed member 12, and at a position corresponding to the slit 12c of the foamed member 13. A slit 13c is formed so as to open from a part of the inner peripheral surface to the outer peripheral surface. On the inner peripheral edge of the annular plate portion 13b on which the tongue portion 13a is provided, in order to reinforce the tongue portion 13a, the end surface 13d on the side opposite to the fixing surface to the foam member 12 has a short length over the entire inner peripheral edge. Reinforcing ribs 13e are provided so as to project, and the tongue portion 13a is provided so as to project from a portion of the reinforcing ribs 13e where the slit 12c is not provided. The tongue portion 13a has a through hole 12b in the foam member 12.
The cross section is arcuate so as to be along the outer peripheral surface of the wire harness W / H inserted in.

The rubber grommet 15 to which the soundproof member 11 is attached has a small-diameter wire insertion portion 15a through which the wire harness W / H closely penetrates and a groove 15c for locking the dash panel 16 on the outer surface. The soundproof member 11 is mounted inside the vehicle body mounting portion 15b. The grommet 15 has a tape 17 wound and fixed together with the wire harness W / H at the tip of the wire insertion portion 15a.

The outer diameter and the outer peripheral shape of the foamed member 12 of the soundproof member 11 are set so as to be closely fitted in the vehicle body mounting portion 15b of the grommet 15. The length of the foam member 12 is such that the soundproof member 11 is grommet 15 from the foam member 12 side.
When inserted inside, the annular plate portion 13b of the wire harness holding member 13 is located at the position of the locking groove 15c of the grommet 15, or the end surface 13d of the annular plate portion 13b is aligned with the end surface of the grommet 15 on the vehicle body mounting portion 15b side. The position is set so that a close fitting state is obtained. In this embodiment, the annular plate portion 13b is set so as to be in a tightly fitted state at the position of the locking groove 15c.

The step of attaching the soundproof member 11 to the grommet will be described. First, the slit of the soundproof member 11 is attached to the wire harness W / H which is previously inserted into the grommet 15 and fixed to the grommet 15 with the tape 17. 12
The c and 13c are widened and attached from the side of the wire harness, and the wire harness W / H is inserted into the through hole 12b. Then, after inserting into the grommet 15 and adjusting the annular plate portion 13b of the wire harness holding member 13 to the position of the locking groove 15c, the tongue portion 13a and the wire harness W / H are attached to the tape 14 Wrap and fix.
Thereby, the grommet 15 and the soundproof member 11 are fixed to the wire harness W / H, respectively, and the soundproof member 11
Is fixed in a state of being loaded in a required loading position in the grommet 15.

As shown in FIG. 3, the grommet 15 loaded with the soundproof member 11 has the engaging groove 15c engaged with the inner peripheral edge of the through hole 16a for inserting the wire harness provided in the dash panel 16 as shown in FIG. Then installed. This effectively prevents the engine vibration sound and the like from the engine room 19 side from passing through the grommet 15 to the vehicle room 18 side.

FIGS. 4A and 4B show the second part of the soundproof member 11.
The embodiment shows the through hole 2 for inserting the hose cable 20.
1 is formed, and the through hole 22 is also formed in the grommet 15 correspondingly. The through hole 21 is provided in the radial intermediate portion of the slits 12c and 13c of the soundproof member 11, and the upper and lower ends of the through hole 21 are slits 12c and 1c.
It communicates with 3c. Therefore, the hose cable 20 can be inserted into the through hole 21 through the slits 12c and 13c.

FIG. 5 shows a third embodiment of the soundproof member 11, in which the outer peripheral edge of the end of the foam member 12 on the side where the wire harness holding member 13 is not fixed is chamfered in a tapered shape.
The foamed member 12 is provided with a tapered surface 23. As a result, when the soundproof member 11 is inserted into the grommet 15, the vehicle body mounting portion 15b is gradually reduced in diameter, and the portion of the grommet 1 that is tapered and is continuous with the wire insertion portion 15a.
The taper surface 23 is fitted to the inner surface shape of No. 5 so that it is more closely fitted.

In the above embodiment, the wire harness is wound around the tongue portion of the soundproof member 11 with a tape and fixed, but it goes without saying that it may be fixed with a band.

[0022]

As is apparent from the above description, in the soundproof member attached to the grommet of the present invention, the soundproof member is tightly fitted to the grommet by fixing the tongue portion provided on the wire harness holding member with tape or a band. Since the soundproofing member is maintained in a fixed state, the soundproofing member is not adhesively fixed at the same time when the soundproofing member is inserted into the grommet as in the conventional case. Can be accurately loaded and can be easily removed and reused if necessary. Further, since no adhesive is used, the adhesive does not stick to hands, clothes, etc., and the workability can be improved.

Further, since the foamed member is made of urethane foam and the wire harness holding member is made of hard rubber, the soundproofing effect can be further improved. Further, since the wire harness holding member has a circular cross section, the wire harness can be reliably held and fixed to the soundproof member.

Further, since the through hole for inserting the hose cable is provided, the through hole for inserting the hose cable and the through hole for inserting the wire harness can be shared, and as a result, the assembling work is simplified. At the same time, the number of parts can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a soundproof member attached to a grommet according to an embodiment of the present invention.

FIG. 2A is a side view of a soundproof member, and FIG. 2B is a front view.

FIG. 3 is a cross-sectional view showing a state in which a grommet loaded with a soundproof member is attached to a dash panel.

FIG. 4A is a side view showing a first embodiment of the soundproof member, and FIG. 4B is a sectional view showing a state in which the grommet loaded with the soundproof member of FIG. .

FIG. 5 is a front view showing a third embodiment of the soundproof member.

FIG. 6 is a sectional view showing a conventional grommet.

[Explanation of symbols]

 11 Soundproofing Member 12 Foamed Member 12b Through Hole 12c, 13c Slit 13 Wire Harness Holding Member 13a Tongue 13b Ring Plate 14, 17 Tape 15 Grommet 16 Dash Panel 18 Vehicle Room 19 Engine Room 20 Hose Cable 21 Through Hole

Claims (3)

[Claims] 1. A soundproofing member to be mounted inside a grommet to be mounted on a wire harness, the soundproofing member having an outer peripheral shape to be tightly fitted inside the grommet,
A cylindrical foamed member having a through hole for inserting a wire harness in the center thereof and a slit for inserting a wire harness, which communicates with a part of the through hole and opens on the outer peripheral surface, and the foamed member A wire harness holding member having an annular plate portion fixed to one end surface thereof and an elongated tongue portion projecting from a part of an inner peripheral edge of the annular plate portion, wherein the wire harness holding member includes a wire. A soundproof member which is fixed to a grommet in which the wire harness is inserted through the through hole of the foamed member by fixing the harness with a tape or a band. 2. The soundproofing member according to claim 1, wherein the foamed member is made of urethane foam, the wire harness holding member is made of hard rubber, and the tongue has an arcuate cross section. 3. The soundproof member according to claim 1, wherein a through hole for inserting a hose cable is provided in a part of the foamed member and the wire harness holding member.