JPH055604U - Sound insulation structure of automobile - Google Patents

Abstract

(57) [Summary] [Purpose] When a cable or the like is vertically penetrated through a panel material for forming a partition wall, it is an object to prevent noise from entering through a through hole formed in the panel material. [Structure] A cable or the like is held by an opening edge of a through hole formed in the panel material by a grommet made of an elastic material, and an elastic material such as a sponge is press-fitted and filled into the through hole in advance. This prevents noise from entering through the air gap that occurs when holding the cable with the grommet, and fills the through hole even if an error occurs between the grommet and the panel material due to an assembly error due to the precision of the parts. Since the assembly error can be absorbed by the elastic material such as sponge, the sound insulation effect can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to improvement of a sound insulation structure such as a dash panel through which cables, harnesses, pipes, etc. penetrate in vehicles such as automobiles.

[0002]

[Prior Art]

 Conventionally, in a dash panel through which a cable, a harness, a pipe, etc. penetrates in a vehicle such as an automobile, the through hole of the dash panel through which the cable, the harness, the pipe, etc. does not break, and the through hole In order to prevent noise in the engine room, which is shielded by the dash panel, from entering the passenger compartment, grommets made of an elastic material such as rubber are used to hold the cables etc. in the through holes that are drilled in the dash panel, and The sound insulation structure is designed for the engine room.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional one, by attaching a grommet made of an elastic material to a through hole formed in a dash panel or the like, a cable or the like passing through the through hole is held and sound insulation in the vehicle compartment and the engine room is maintained. In the case of trying to do so, the cables etc. passing through the through holes drilled in the dash panel etc. have various diameters, and only the grommet made of an elastic material creates a void, and this through hole Since it is not possible to sufficiently shield the noise of the cable, the diameter of the hole on the grommet side that penetrates and holds the cable etc. is made small to cope with the gap that occurs when the cable etc. is penetrated. However, the sound insulation effect cannot be fully enhanced due to the limitation of processing and assembly accuracy.

Therefore, by providing a space in the insulator dash for an automobile, it is attempted to attenuate the intruding noise by letting a cable or the like pass through the insulator dash in this space. Alternatively, a sound insulation material that consists of a separate sound insulation material and grommet body is fitted and held inside the grommet body, and the annular recess provided on the outer periphery of the grommet body is used as a panel material. A device that is locked to the edge of the through hole (No. 57-15626) is proposed, but in the case of No. 3-17955 No. 17595, a large space should be taken in the part where the insulator dash is attached. And it is difficult to secure a large noise-attenuating space inside the insulator dash. Therefore, the sound insulation effect is insufficient, and in the case of No. 57-15626, the sound insulation material fitted in the grommet body improves the sound insulation effect of the grommet that holds the cable itself. However, the sound insulation effect between the grommet and the vehicle body panel cannot be expected.

Therefore, the present invention is intended to improve the drawbacks of the above-mentioned conventional ones, and has a simple structure to provide a sound insulation effect against noise that enters a vehicle interior by a cable or the like that penetrates a dash panel or the like. It is to make the most of it.

[0006]

[Means for Solving the Problems]

 For that purpose, elastic sound insulation material such as sponge is fixed in advance with an adhesive or the like in the through hole that has a cable that is drilled in the panel and that is held by the grommet at the edge of one opening, and then fixed with an adhesive. It will be.

[0007]

[Action]

 With the above structure, the sponge and other elastic materials that are filled and fixed in the through holes formed in the dash panel, etc., absorb the noise that enters from the gap of the grommet generated by holding the cables and the like. be able to.

Further, even if an assembly error occurs between the through hole formed in the dash panel and the grommet engaged with the through hole, the assembly is pressed into the through hole even if an assembly error occurs. Since the assembly error is absorbed by the elastic sound-insulating material such as the sponge filled with, the sound-insulating effect between the vehicle compartment and the engine room, which is partitioned by the dash panel, can be sufficiently secured.

[0009]

【Example】

 The invention will be further described with reference to the embodiments shown in the drawings. (1) is a sound insulation structure in a vehicle which is an embodiment of the present invention. The sound insulation structure (1) in this vehicle separates, for example, a vehicle compartment (2) from an engine room (3), and a cable etc. 4) The dash panel (5) having a through hole (6) extending longitudinally through the dash panel (5) and the opening end edge (7) of the through hole (6) formed in the dash panel (5) are engaged, It is composed of a grommet (8) made of an elastic material such as rubber, which holds a cable (4) vertically passing through the through hole (6).

An elastic sound insulation material (9) such as a sponge is press-fitted and filled in the through hole (6) formed in the dash panel (5).

Since the present invention has the above configuration, it is filled and fixed in the through hole (6) formed in the dash panel (5) for separating the vehicle compartment (2) and the engine room (3). The elastic sound-insulating material (9) such as a sponge prevents the cable (4) from being damaged by coming into contact with the opening end edge (7) of the through hole (6), and prevents the engine room (3) from being damaged. ) Grommet holes generated by holding cables etc. by the grommet (8) locked to the opening edge (7) of the through hole (6) to prevent the intrusion of noise from inside. It is possible to absorb the noise that enters from the void generated in (10).

Further, since the elastic sound insulating material (9) integrated with the grommet (8) is previously assembled in the through hole, the work is easy, and the through hole (6) formed in the dash panel (5) and Even if an assembly error occurs between the grommet (8) and the grommet (8) locked in the through hole (6), a sponge or the like filled by being press-fitted into the through hole (6) is generated. Since the elastic sound insulation material (9) absorbs the assembly error, the sound insulation effect between the vehicle compartment (2) and the engine room (3) separated by the dash panel (5) can be sufficiently secured.

The thickness and diameter of the elastic sound insulation material (9) such as a sponge, which is press-fitted into and filled in the through hole (6) formed in the dash panel (5), is set to the inside of the through hole (6). Since it is intended for filling, it is appropriate to set the thickness and diameter to be slightly larger.

[0014]

[Effect of the device]

 As described above, the grommet is used to hold the cable, etc., which is vertically passed through the through hole formed in the dash panel, etc. at the edge of the opening of the through hole, and the elastic sound insulating material such as sponge that is integrated with the grommet is previously held in the through hole. By press-fitting and filling, the sound insulation effect between the vehicle compartment and the engine room, which are separated by the dash panel, etc., is enhanced, and the workability is made efficient.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an embodiment of the present invention.

[Explanation of symbols]

 1 Sound insulation structure 2 Vehicle compartment 3 Engine room 4 Cables, etc. 5 Dash panel 6 Through hole 7 Opening edge 8 Grommet 9 Elastic sound-insulating material such as sponge 10 Grommet hole

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[Procedure amendment]

[Submission date] August 24, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (1)

[Claims for utility model registration] [Claim 1] An elastic sound-insulating material is preliminarily attached to the grommet with an adhesive or the like in a through hole having a cable formed in a panel and held at one end edge by a grommet. A sound insulation structure for automobiles that is fixed and then filled.