JPH0143326Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in a soundproof structure for blocking engine noise from permeating into the interior of the vehicle from a darts panel that separates the engine room and the interior of the vehicle.

In the case of a darts panel that separates the engine room and the passenger compartment of a car, a darts insulator is usually installed on the surface of the darts panel on the inside of the passenger compartment in order to prevent engine noise from penetrating from this area and causing noise inside the vehicle. However, the material properties of this dart insulator are designed to reduce cabin noise as much as possible.

In addition, although such soundproofing measures are generally considered to be effective, in order to further increase such soundproofing performance, a hood insulator is attached to the hood inner, and a hood insulator is added to the panel surface on the engine room side. In some cases, a dart insulator (hereinafter referred to as engine room insulator) is attached, which further improves the soundproofing effect.

However, the former has a considerable effect on reducing cabin noise, and the latter has an extremely complex shape, a large number of parts, and In order to avoid the parts mounting area, many openings must be provided in the engine room insulator.

Therefore, it has been pointed out that manufacturing the engine room insulator or assembling it to the vehicle body is extremely troublesome, and that the holes drilled in the insulator reduce the soundproofing effect, making it difficult to obtain the desired effect. It had been.

This invention was devised in view of the above-mentioned problems, and the object is to obtain a soundproof structure for an automobile that can achieve the desired soundproofing effect through simple manufacturing and installation.

In order to achieve the above object, the present invention has an upper edge fixed to a hood sealing rubber attached to the upper edge of the darts panel between the engine and the darts panel that partitions the engine room and the passenger compartment of the automobile, and a lower This invention is characterized by a suspended soundproof wall whose edges abut against the dash panel.An embodiment of this invention will be described below in detail with reference to the drawings.

Figure 1 shows the engine room E to which this invention is applied.
This part shows the boundary between the front floor 1 that forms the floor surface, the dart lower 2 that stands up from this floor 1 at one end, and the upper part of this lower 2 that curves toward the passenger compartment R side. The formed dash top 3, a cowl top front panel 4 formed to protrude toward the engine room E side opposite to the dash top 3, a cowl top front panel 5, and an engine hood 6 provided on the front of the top panel 5 so as to be openable and closable. A windshield 8 is attached to the joint between the upper panel 5 and the dash upper 3 via a gasket 7.

A hood sealing rubber 9 is attached to the tip of the atsupa panel 5 in the direction of the vehicle, and when the engine hood 6 is closed, it provides an airtight seal between the vehicle, the main body side, and the engine hood 6. At the same time, the upper edge of the soundproof wall body 10 is integrally attached to the hood sealing rubber 9, and its lower part is suspended from the lower side of the engine room E.

As shown in detail in FIG. 2, the hood sealing rubber 9 includes a rubber mounting base 11 that is U-shaped and has a pair of locking claws 11a, 11a on opposing inner surfaces thereof, and one side of this mounting base 11. A hood sealing rubber body 12 made of a hollow foam body is integrally fixed to the hood sealing rubber body 12, and by sandwiching the mounting base 11 along the extended end of the joint between the front panel 4 and the top panel 5, The main body 12 is fixed to the edge.

The soundproof wall body 10 includes a sound absorbing material 10a made of felt, foamed polyurethane, etc., a sound insulating material 10b made of a soft vinyl chloride sheet, etc., and a fire-resistant film 10c made of polyethylene, vinyl chloride, etc. laminated on the back side of the sound absorbing material 10a. As shown in Fig. 3, the trim is cut into a substantially inverted trapezoid shape along the side shape of the engine compartment E, and the trim is cut to avoid the engine 13a mounted in the engine compartment E and equipment in the engine compartment. The shape of the lower end is uneven.

The upper edge of this soundproof wall body 10 is made thinner, and as shown in FIG. By fitting the base 11, its upper edge is fixed to the upper edge of the cowl top, and the lower part of the soundproof wall 10 is preformed by press molding or the like so as to be curved toward the cowl top front panel 4. It is formed in an eccentric state.

In addition, in FIG. 3, 14, 14 are hood lids provided on both sides of the engine room E, 15, 15 are wheel houses for tires 16, 16, 17, 17
is a fender that covers the outer circumference of the tire 16.

Therefore, in the soundproof structure configured as described above, the inside of the engine room E is further divided by the soundproof wall 10 into a part closest to the engine 13a and a part near the dash panel. Due to the soundproofing effect of the wall 10, engine noise is not directly transmitted to the dashboard panel.
Most of the vibrations and noise transmitted through this part are attenuated here, and the vibrations and noise transmitted through this part are blocked by the dart insulator 18 installed inside the passenger compartment R from the dart lower 2 to the dart upper 3. These provide a double soundproofing effect.

Moreover, what is shown in FIG. 4 shows a second embodiment of this invention.

In this example, a flange 20 at the joint between the cowl top front panel 4 and the dash top 2 is made to further protrude toward the engine room E, and the lower end of the soundproof wall 10 is configured to abut on this flange 20. be.

In this example, the lower part of the soundproof wall 10 is not curved as in the first embodiment, but simply suspended, and the lower end comes into contact with the flange 20 to fix this part. Furthermore, if some kind of maintenance is required, this part can be rolled over to carry out maintenance.

Next, FIG. 5 shows a third embodiment of this invention, in which the soundproof wall body 30 is composed of an assembly of small strips 30a, 30a, . . . The edges are integrated and wrapped around and fixed to the mounting base 11 of the hood sealing rubber 9 described above. According to such a configuration, the soundproof wall body 30 has a so-called blind-like shape,
Therefore, for example, when a harness or pipe passes through this part, each small piece can be opened and the harness or pipe can be inserted here, and the other parts can be closed, so it can be specially processed to suit the vehicle model. Moreover, since the slits are closed in other parts,
It does not affect the soundproofing effect either.

As explained in each of the embodiments above, in the soundproof structure of an automobile according to this invention, a soundproof wall body integrated with the hood sealing rubber of the engine hood is suspended from the bottom of the hood sealing rubber, and the lower edge thereof Since it is placed in contact with the darts panel, it is compared to, for example, conventional engine room insulators, which are molded to match the surface shape of the darts panel for each car model and have through holes formed therein. The configuration is extremely simple, and it can be shaped to suit each vehicle type by simply cutting the outer periphery of sound-insulating or sound-absorbing material.

In addition, with this invention, it is possible to avoid this wall and connect to the engine side without providing openings corresponding to the protruding holes of harnesses, pipes, shafts, etc. as in the past, and in such installation, Furthermore, since there is no need to provide a large number of through holes as in the conventional method, the effective soundproofing area increases, and the soundproofing effect can be expected to be further improved.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the soundproof structure in the partition between the engine room and the passenger compartment according to the first embodiment of this invention, and Fig. 2 shows the mounting structure of the hood sealing rubber and the upper part of the soundproof wall body. FIG. 3 is an enlarged perspective sectional view, FIG. 3 is a sectional view taken along the - line in FIG.
The figure is a front view showing a third embodiment of this invention. 2... Datsushi Yuroa, 3... Datsushi Yuatsupa,
4...Cowl top front panel, 5...Cowl top top panel, 6...Engine hood, 9...
...Hood sealing rubber, 10,30...Soundproof wall body.

Claims (1)

[Scope of utility model registration request] Between the engine and the darts panel that separates the engine room and the passenger compartment of a car, the upper edge is fixed to the hood sealing rubber attached to the upper edge of the dash panel, and a soundproof wall body is suspended, the lower edge of which touches the dash panel. A soundproof structure for an automobile that is characterized by: