JP2819749B2 - Silencer mounting structure - Google Patents

Description

The present invention relates to a structure for mounting a silencer provided on a dash panel surface of an automobile.

b. Conventional technology Conventionally, to cut off noise from the engine room,
As shown in FIGS. 3 and 4, a structure is adopted in which a dash panel c provided at the boundary between the engine room a and the passenger compartment b is provided with a silencer f composed of a sound absorbing material and a sound insulating material.

FIG. 5 shows an example of the specific structure, in which a silencer f in which a sound absorbing material d and a sound insulating material e are bonded to each other is attached to a dash panel c by clips g in a state as shown in the figure. The upper end of the silencer f extends the portion of the sound insulating material e, and is pressed against the upper end of the dash panel c by the end i of the inner panel h so as to be sealed.

c. Problems to be Solved by the Invention In the above-mentioned conventional structure, since the dash panel c is inclined toward the indoor side, the extended sound insulating material e falls down as shown in FIG. If the pressing is not sufficient, there is a problem that a gap j is generated between the dash panel c and the dash panel c, so that sound leakage occurs.

The present invention has been made in view of the above circumstances, and has as its object to provide a silencer mounting structure that solves the above problems.

d. Means for Solving the Problems According to the above object, the present invention relates to a silencer mounting structure in which a silencer is stretched on a dash panel of an automobile, and an end of an inner panel is arranged on an upper part of the silencer. An elastic member having an L-shaped cross section is fixed to the upper end of the inner panel. On the other hand, a holding plate extends downward on the inner panel near the end thereof, and the upper half of the elastic member is extended by the end of the inner panel. This problem was solved by pressing and fixing the lower part of the elastic member and the upper end of the silencer with the side surface of the holding plate.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2, reference numeral 1 denotes a dash panel of an automobile, 2 denotes an upper panel, 3 denotes a front window, 4 denotes an inner panel, 5 denotes a silencer, and is fixed to the dash panel 1 by a clip 6. A pressing plate 4 a extending downward is provided on the inner panel 4 so as to correspond to the width of the inner panel 4.

The silencer 5 has a sound absorbing material 5a and a sound insulating material 5b stretched and fixed, and an elastic member 8 made of, for example, rubber sponge and having an L-shaped cross section (see FIG. 2 (b)) is fixed to the upper end thereof by bonding or the like. I have.

In the state shown in FIG. 1, the silencer 5 is fixed to the dash panel 1 by the clip 6 in the same manner as in the prior art. Next, when the inner panel 4 is fixed in a state as shown in FIG. 1, the elastic member 8 is fixed by the end face 4b of the inner panel 1.
The upper half 8a is pressed forward and attached in the state as shown. The pressing plate 4a of the inner panel 4 abuts on the upper end of the silencer 5 and the lower half portion 8b of the elastic member 8, and these are similarly attached while being pressed against the dash panel 1. The upper surface of the lower half 8b of the elastic member 8 also
It is pressed downward by the inner panel 4 up to the end face 4b protruding forward from the holding plate 4a.

Therefore, the respective ends of the dash panel 1 and the silencer 5, and the respective ends of the silencer 5 and the inner panel 4 are brought into close contact with each other by the elastic member 8 interposed therebetween, thereby forming an airtight structure.

As shown in FIGS. 2A, 2B and 2C, the thickness H of the silencer 5, the thickness C of the upper end 8a and the thickness A of the lower half 8b of the elastic member 8, Holding plate for inner panel 4
Assuming that the hanging length D of 4a and the length from the holding plate 4a to the end face 4b are B, the following relationship is established.

A <H, B <H, C> H−B, D≫H e. Effect of the Invention According to the silencer mounting structure of the present invention, the end of the silencer in contact with the inner panel is sealed. , It is possible to prevent noise leakage as in the related art, and a sufficient effect as a silencer can be obtained. Moreover, the end portion of the silencer also has a relatively simple structure, and even if the inner panel comes into contact with the body, generation of chattering noise can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional explanatory view of a silencer mounting structure according to the present invention, and FIGS. 2 (a), (b) and (c) are diagrams showing the relative dimensions of a silencer, an elastic member and an inner panel end, respectively. 3 is an overall view showing a mounting position of a silencer of the automobile, FIG. 4 is an enlarged sectional explanatory view of a silencer portion in FIG. 3, and FIGS. 5 and 6 are sectional explanatory views of a conventional structure. 1 dash panel, 4 inner panel, 5 silencer, 8 elastic member.

Claims (1)

(57) [Claims] 1. A silencer mounting structure in which a silencer is stretched over a dash panel of an automobile, and an end of an inner panel is disposed above the dash panel, and an elastic member having an L-shaped cross section is fixed to an upper end of the silencer. And, on the other hand,
A holding plate extends downwardly to the inner panel near an end thereof, and an upper half of the elastic member is provided by an end of the inner panel, and a lower half of the elastic member is provided by a side of the holding plate. And an upper end portion of the silencer.