JP2554181B2 - Automotive air box structure - Google Patents

Description

Description: [Industrial field of use] The present invention relates to an air box structure for an automobile provided with a vibration damping material for suppressing vibration.

[Prior Art] Conventionally, as an air box structure for an automobile of this type, there is, for example, one as shown in FIGS. 7 to 9.

In the figure, reference numeral 1 denotes an air box.
The cowl top 2 and the dash upper 3 are assembled in a box-shaped cross section, and side panels 4 that close the box portion are provided on both sides of the cowl top 2 and the dash upper 3.

The cowl top 2 has an upper surface 2a provided with an opening 2b for taking in outside air, and the dash upper 3 has a bottom surface 3a for introducing air from the opening 2b into the vehicle compartment, which is not shown. There is a mouth. Also, its bottom surface 3a
As shown in FIG. 7, a drainage groove 3b is formed in the side wall for draining rainwater and the like entering through the opening 2b to the outside of the vehicle through the communication opening 4a formed in the side panel 4.

Further, in the air box 1, a damping material 5 (so-called heat-melting and solidifying type which is melted by heat and then solidified at a predetermined position on the bottom surface 3a of the dash upper 3 as shown in FIG. The damping material (1) is temporarily attached by the adhesive 6. The position of the damping material 5 is set at a position where vibration is desired to be suppressed, that is, at the mounting position of the steering post bracket 7 in this case, on the vehicle rear side of the drainage groove 3b for guiding rainwater.

Then, the damping material 5 is melted by the heat in the drying furnace in the subsequent coating step, and is fixed to the bottom surface portion 3a of the air box 1 in a normal manner.

In FIG. 8, reference numeral 8 is a front pillar, reference numeral 9 is a hood ridge reinforcement, reference numeral 10 is a steering post, reference numeral 11 is a dash lower, and reference numeral 12 is a front window panel.

It should be noted that, as for this kind of thing, it will be described later in 59-2372.
There is the one described in Japanese Patent Publication No. 0.

[Problems to be Solved by the Invention] However, in such a conventional automobile air box structure, the damping material 5 is attached to the bottom surface portion 3a of the dash upper 3 so that the position thereof does not move. Since it is fixed by the adhesive 6, the adhesive 6 is stuck to other parts when the damping material 5 is adhered, and the workability is poor.
There is a problem that the cost will increase. Also, simply adhesive 6
If the above is abolished, a positional deviation occurs when the damping material 5 melts during transportation of the vehicle and the painting process, the front edge of the damping material 5 projects into the drainage groove 3b, and then solidifies. Since it would impair drainage, it could not be abolished without exception, and the cost had to be increased.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned conventional problems, and has an air box structure for automobiles, which has a box cross-section structure and in which a damping material is attached at a predetermined position on the bottom surface. At
While forming a slit on the damping material, a reinforcement is fixed at a predetermined position on the bottom surface of the air box, and a locking piece formed on the reinforcement is inserted into the slit formed on the damping material. An air box structure for an automobile is characterized in that the damping material is clamped and locked to the locking piece and laid on the bottom surface portion.

[Operation] According to such means, when disposing the damping material, it suffices to insert the locking piece of the reinforcement into the slit of the damping material, so that the disposition workability is improved. .

In addition, since the locking piece of the reinforcement is clamped and locked by the slit, the damping material is temporarily fixed to the bottom surface of the air box, so that the damping material is not displaced in the air box.

[Examples] Hereinafter, the present invention will be described based on Examples.

1 to 3 are views showing a first embodiment of the present invention. The same members as the conventional ones will be described with the same reference numerals.

First, the configuration will be described. In FIG. 1 and FIG. 2, reference numeral 1 is an air box, and the air box 1 includes a cowl top 2 and a dash upper 3 attached to a lower side of the cowl top 2 in a sectional box. It is formed into a shape and is arranged along the vehicle width direction.

A drainage groove 3b is formed on the bottom surface portion 3a of the dash upper 3 along the vehicle width direction, and a pair of reinforcements 13 are arranged along the vehicle front-rear direction on the vehicle rear side of the drainage groove 3b. As in the conventional case, a heat-melting and solidifying type vibration damping material 14 is attached to the reinforcement 13 and is laid on the bottom surface portion 3a. Specifically, in these reinforcements 13, the mounting plate portion 13a is spot-welded and fixed to the bottom surface portion 3a, and the locking piece 13b is projected upward from the mounting plate portion 13a, and this locking is performed. Bent part at the upper edge of the piece 13b
13c is formed. On the other hand, in the damping material 14, a pair of slits 14a are formed at positions corresponding to the reinforcement 13 along the vehicle front-rear direction, and the locking pieces 13b of the reinforcement 13 are inserted into the slits 14a. The locking piece 13b
It is designed to exert a retaining effect together with the bent portion 13c by pressing.

Further, in the portion corresponding to the disposition position of the damping material 14,
A steering post bracket 7 is fixed to the interior side of the dash upper 3, and a steering post 10 is supported by the steering post bracket 7.

Next, the operation of the automobile air box structure having such a configuration will be described.

A pair of reinforcements 13 are fixed and placed on the bottom surface 3a of the dash upper 3 in advance.
Insert 13b into the slit 14a of the damping material 14,
The bent portion 13c formed at the upper edge of b is projected above the damping material 14 (see FIG. 3). In this way, if the vibration damping material 14 is laid on the bottom surface portion 3a of the dash upper 3, the vibration damping material 14 can be easily arranged without using the adhesive 6 unlike the conventional case. .

Further, since the pair of reinforcements 13 have a substantially L-shaped cross section, the second moment of area is larger than that of a flat plate, so that the reinforcements 13 are fixed to the bottom surface 3a of the dash upper 3. By doing so, the strength of the air box 1 can be improved by the reinforcement 13 as compared with the conventional case.

4 to 6 show a second embodiment of the present invention.

The reinforcement 23 of this embodiment is composed of a single plate material and has a wavy cross section along the vehicle width direction,
At the rear edge of the vehicle of the reinforcement 23, the locking piece 23
While a is bent upward, a contact piece 23b is bent upward at the end edge portion on the front side of the vehicle. On the other hand, the damping material 24 has a slit 24a formed along the vehicle width direction on the rear edge side thereof, into which the locking piece 23a of the reinforcement 23 is inserted.

According to this structure, first, the reinforcement 23
The joint surface portion 23c is fixed by spot welding to the bottom surface portion 3a of the dash upper 3 as shown in FIG. Then, the damping material 24 is placed on the reinforcement 23, and in this case, in the slit 24a of the damping material 24,
The locking piece 23a of the reinforcement 23 is inserted, and the front end edge portion 24b of the damping material 24 is brought into contact with the contact piece 23b of the reinforcement 23 as shown in FIG.

Even in this case, similarly to the above embodiment, the damping material 24 can be easily arranged and temporarily fixed, and the strength of the air box 1 can be improved by the reinforcement 23. In particular, the reinforcement 23 of this embodiment
Since the rigidity is improved due to the wavy cross section, the strength of the air box 1 can be further improved as compared with the first embodiment.

[Effects of the Invention] As described above, according to the present invention, the slits are formed in the damping material, while the reinforcement is fixed at a predetermined position on the bottom surface of the air box. By inserting the slit formed in the damping material into the locking piece, the damping material can be easily arranged, and the adhesive is not required, so that the cost can be reduced. In addition, the provision of the reinforcement exerts a practically useful effect that the strength of the air box can be improved.

[Brief description of drawings]

1 to 3 are views showing a first embodiment of an automobile air box structure of the present invention. FIG. 1 is a perspective view showing a main part of the structure, and FIG. 2 is a vehicle longitudinal direction of the structure. FIG. 3 is a sectional view taken along line II-II of FIG. 2, FIGS. 4 to 6 are views showing a second embodiment of the present invention, and FIG. 4 is shown in FIG. Corresponding perspective view, FIG. 5 is a sectional view corresponding to FIG. 2, FIG. 6 is a sectional view taken along line VI-VI of FIG. 5, and FIG.
Figures 9 to 11 are views showing a conventional air box structure,
FIG. 7 is a perspective view of the same structure, and FIG. 8 is VIII-VIII of FIG.
A sectional view taken along the line, and FIG. 9 is a sectional view corresponding to FIG. 1 …… Air box 3a …… Bottom part 13,23 …… Rain force 13b, 23a …… Locking piece 14,24 …… Damping material 14a, 24a …… Slit

Claims (1)

(57) [Claims] 1. An automobile air box structure having a box cross-sectional structure and having a damping material mounted at a predetermined position on a bottom surface thereof, wherein a slit is formed in the damping material while a predetermined position on the bottom surface of the air box is formed. On the bottom surface by fixing the reinforcement force to, and inserting the locking piece formed in the reinforcement into the slit formed in the damping material, and clamping the damping material with the locking piece. An air box structure for automobiles, which is characterized by being installed in