JPH03279048A - Fitting construction of silencer - Google Patents

Abstract

PURPOSE:To perfectly close the upper end part of a silencer to prevent leak of noise through a gap and the like by forming an inverse U-shaped part continuously provided with a folding back part on the upper end of a dash panel, and fitting and pressing the upper end of a silencer into the inverse U-shaped part. CONSTITUTION:After arranging the upper end of a silencer 5 under the folding back part 1a of a dash panel 1, the upper end part is moved upward, pressing to the dash panel 1 side as shown with the arrow mark in the figure, and the upper end is pushed inside the inverse U-shaped part formed with the folding back part 1a. After pushing in a decided quantity, a stud 1b on the dash panel 1 is conformed to a through hole 5c and set on the regular position. Nextly, a clip 6 is inserted to the through hole 5c, the stud 1b on the dash panel 1 is inserted to the hole 6c of the clip 6 and pushed in, and the upper end of the silencer 5 is assembled inside the upper end of inverse U-shped part of the dash panel in the closely contacted condition.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a mounting structure for a silencer provided on a dash panel surface of an automobile.

b. Conventional Technology Conventionally, in order to block noise from the engine room, a dash panel cL has been provided at the boundary between the engine room a and the passenger compartment as shown in Figures 4 and 5; - Sound absorbing materials and sound insulating materials. A structure is adopted in which a silencer f is provided by bonding the two. As shown in FIG. 6, this silencer f has a stud k for fixing erected on the dash panel C, a through hole m is provided on the silencer f side at a corresponding position, and the through hole m is inserted into the stud k for fixing. After inserting k,
As shown in the figure, the silencer f is attached to the dash panel C by inserting the stand k into the hole q of the clip g while inserting the lip g (stopper) into the through hole m.
I was trying to fix it to .

The upper end surface of the silencer f was in contact with the lower surface of the upper end of the dash panel C bent into an L shape as shown in the figure.

C9 Problems to be Solved by the Invention In the conventional mounting structure described above, in order to facilitate the alignment when assembling the silencer f to the dash panel C and improve the workability of assembling, a projecting structure is provided on the dash panel C. The diameter of the through hole m on the silencer f corresponding to the stud k is made considerably larger than the diameter of the clip g inserted therein to provide a gap, and the center of the stud is slightly offset from the center of the through hole m. Also, the upper end surface of the silencer f assembled in this state may not come into contact with the lower surface of the upper end of the dash panel C, and therefore the gap formed there There was a problem in that noise from the engine room a leaked through the silencer, reducing its effectiveness as a silencer by half.

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

d. Means for Solving the Problems In accordance with the above object, the present invention provides, when a silencer is installed on a dash panel of an automobile, a folded part is connected to the upper end of the dash panel to form an inverted U-shaped part. However, the above-mentioned problem has been solved by providing a silencer mounting structure in which the upper end of the silencer is fitted and crimped into this inverted U-shaped portion.

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

In Fig. 1, 1 is a dash panel of an automobile, 2 is an upper panel, and 5 is a silencer, which has a structure in which a sound absorbing material 5a and a sound insulating material 5b are stretched and fixed to each other, and a through hole 5c for attachment is provided. be.

The dash panel 1 has an upper end formed in an inverted U shape,
A folded portion 1a is provided, and the top portion is fixed to the upper panel 2 by spot welding. The radius W between the folded portion 1a and the dash panel 1 is smaller than the thickness T of the silencer 5.

Further, a stud 1b for fixing the silencer 5 is provided protruding from the silencer 5 as in the conventional case. Reference numeral 6 denotes a rivet-like clip, which is provided with a shaft portion 6a, an umbrella portion 6b, and a 66C that passes through the shaft portion 6a and the umbrella portion 6b in the axial direction. The outer diameter of the shaft portion 6a is smaller than the hole diameter of the through hole 5C of the silencer 5, and is configured so that there is sufficient clearance around it when inserted, as in the conventional case.

To assemble and fix the silencer 5 to the dash panel 1 having the above structure, first as shown in FIG.
After placing the upper end under the folded part 1a of the dash panel 1 ((a) in the same figure), press the upper end against the dash panel 1 side as shown by the arrow and move it upward (((a) in the same figure). b)), Push the upper end into the inside of the inverted U-shape formed by the folded part 1a ((C) in the same figure). After pushing the stud 1b on the dash panel 1 into the through hole 5c, after pushing it in the specified amount. and set it in the correct position.

Next, insert the clip 6 into the through hole 5c ((d) in the same figure).
Insert stud 1 on dash panel 1 into clip 60 hole 6c
By pushing in while inserting b, the silencer 5 is assembled in the state shown in FIG.

In this way, the upper end of the silencer 5 is pushed into the inside of the upper end of the inverted U-shaped dash panel 1 and tries to restore its shape, so that the upper end of the silencer 5 comes into close contact with the dash panel on the inner wall of the inverted U-shaped part, creating an airtight structure. Become. Furthermore, by making the folded portion 1a sufficiently long, the same state can be maintained even if the silencer is slightly shifted.

FIG. 3 shows another embodiment, in which the folded portion 218 at the upper end of the dash panel 21 is in a state where the lower end is enlarged as shown. First, insert the upper end of the silencer 5 there (see figure (a)), then insert the clip 6 and insert the silencer 5.
After fixing the folded portion 21a, the folded portion 21a is bent by hitting it with a hammer 25 or the like (as shown in the same figure), and the upper end portion of the silencer 5 is brought into close contact with the same state as in the previous embodiment (as shown in the same figure). (C) ).

e. Effects of the Invention According to the silencer mounting structure according to the present invention, since the upper end portion of the silencer is completely closed, noise does not leak from gaps, etc., and the effect of sound absorption and sound insulation is great.

Additionally, the silencer itself is relatively easy to assemble because it utilizes its own elasticity.

Furthermore, since it is sufficient to simply extend the front end of the panel without using any special parts, there is no increase in the number of parts, and therefore there is almost no increase in cost.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional explanatory view of one embodiment of the silencer mounting structure according to the present invention, Fig. 2 (a), (b), (C),
(d) is an explanatory diagram of the installation procedure for the same mounting structure, Part 3 (
a), Φ). (C) is an explanatory diagram of the installation procedure of another embodiment, FIG. 4 is an overall view showing the installation position of the automobile silencer, and FIG.
This figure is an enlarged sectional view of a portion of the silencer shown in FIG. 4, and FIG. 6 is an explanatory diagram of the installation procedure of the conventional structure. 1... Dash panel, 5... Silencer patent applicant Suzuki Motor Co., Ltd. (and 2 others)

Claims (1)

[Claims] When a silencer is installed on a dash panel of a car, a folded part is connected to the upper end of the dash panel to form an inverted U-shaped part, and the upper end of the silencer is fitted into this inverted U-shaped part. A silencer mounting structure characterized by crimping.