JP4329513B2 - Vehicle sound insulation structure - Google Patents

Description

  The present invention relates to a vehicle sound insulation structure near a windshield panel using a dash insulator in a vehicle such as an automobile.

Conventionally, as a first example of a vehicle sound insulation structure in the vicinity of a windshield panel using a dash insulator, for example, an upper part of a dash insulator that comes in contact with a dash panel of an automobile and an upper part that does not come in contact are compression-molded into a predetermined shape. Is installed at the rear end of the instrument panel, and when the windshield panel is installed, it is sandwiched between the instrument panel and the windshield panel so that sound from the engine room does not enter the passenger compartment. . (For example, refer to Patent Document 1.)
As a second example, the upper end portion of the dash insulator extends to the dash panel, one end holds the upper end portion, the other end abuts the windshield panel, and the middle portion is attached to the rear end of the instrument panel. A vehicle sound insulation structure is shown in which seal parts are pushed in and incorporated. (For example, see Patent Document 2.)
Further, as a third example, when the dash insulator is pressed to attach the windshield panel with the seal member provided at the tip position of the instrument panel with the upper end of the dash insulator placed on the dash panel. In addition, it is shown as a structure that is sandwiched between a windshield panel and an instrument panel via a seal member to provide sound insulation. (For example, refer to Patent Document 3.)
Japanese Patent Laying-Open No. 2003-72593 (FIGS. 1 and 5) Japanese Patent Laid-Open No. 11-115551 (FIG. 1) Japanese Patent Laid-Open No. 9-156431 (FIG. 1)

  However, in the first example, since the dash insulator is sandwiched between the instrument panel and the windshield panel to make sound insulation, when the windshield panel is pressed and bonded in the process of attaching the windshield panel, , The dash insulator itself is compressed and hardened, and there is a problem that the reaction force from it is large and the windshield panel floats up and the assembling property is lowered, and it may not fit well with the molded shape and the sound insulation is not enough is there.

  Further, the second example and the third example have a problem that the number of parts such as a seal member increases, resulting in an increase in cost.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an inexpensive vehicle sound insulation structure that suppresses the reaction force from the dash insulator, has good assembly workability, has a small number of parts, and is inexpensive.

In order to solve the above problems, the invention according to claim 1, the passenger compartment side of the dash panel partitioning the engine room and the passenger compartment, equipped with a dashboard insulator, the dash insulator before Symbol dash panel upper portion of the In the vehicle sound insulation structure mounted so as to protrude upward from between the dash panel and the front end portion of the instrument panel disposed in the rear upper part of the windshield panel,
The dash insulator is composed of a multilayer having a thick base portion and a thin skin portion, and the upper end portion is the skin portion .

A second aspect of the present invention, the skin portion of the upper portion is directed to the vehicle sound insulating structure according to claim 1, characterized in that it has a bellows-like portion which is folded so as to stretch in the vertical direction of the vehicle .

According to a third aspect of the present invention, there is provided the vehicle sound insulation structure according to the second aspect, wherein groove-shaped beads are formed at appropriate intervals at the peaks of the bellows-shaped portion.

According to the invention of claim 1, thin projecting portion projecting upward from the dash panel dash insulator was multilayer having a substrate portion and the thin skin portion of the thick and and the upper end surface skin portion and, since the configuration Ru abutted the windshield panel in the upper section, between the dash panel and windshield panel and the instrument panel so large reaction force from the dash insulator moderately windshield panel abutting without The sound coming from the door can be insulated, and the windshield panel assembly workability is improved, the number of parts is reduced, the number of man-hours is reduced, and the cost can be reduced.

The thickness base portion of the meat is removed, so is protruded further general nature on efficient sound insulation of the epidermis portion to a dense density achieved.

Further, according to the invention according to claim 2 , since the skin portion, that is, the projecting portion at the upper end portion is formed in an accordion shape, in addition to the effect of claim 1 , it is possible to absorb variations in spatial accuracy, and the reaction force is also appropriate. Further improve workability and sound insulation.

According to the third aspect of the invention, in addition to the effect of the second aspect , the windshield panel has a better followability, better workability, and better sound insulation than the curved surface of the windshield panel.

  Hereinafter, a vehicle sound insulation structure according to an embodiment of the present invention will be described with reference to the drawings.

  Vehicles, particularly passenger cars, generate driving noise such as engine noise and noise that accompanies traveling, and on the other hand, they are equipped with a closed space in which passengers such as drivers get on without being bothered by these various sounds. Because they want to talk, listen to music, and drive comfortably, sufficient attention is paid to sound insulation.

FIG. 4 shows the vicinity of the windshield panel in front of the front seat of the vehicle 1. The windshield panel 2 is surrounded by the cowl 3, the roof 4, and the front pillar 5 at the part that partitions the engine room E and the passenger compartment R. It is mounted in the position. An instrument panel 6 is mounted behind the windshield panel 2.

  An XX cross section in FIG. 4 is shown in FIG. A dash panel 7 is provided at a position that partitions the engine room E and the passenger compartment R. The dash panel 7 includes a cowl dash 7a that receives and supports the windshield panel 2 and a dash lower panel 7b that covers the cowl dash 7a to a floor panel (not shown). A dash insulator 10 is mounted on the dash panel 7 on the passenger compartment side. In this vehicle sound insulation structure, the upper end portion of the dash insulator 10 is protruded upward from between the front end portion of the instrument panel 6 disposed at the upper rear portion of the dash panel 7 and the dash panel 7 so as to wind the windshield panel. 2 is attached so as to abut the protruding portion 10a which is the upper end portion.

  In this vehicle sound insulation structure, the dash insulator 10 has at least two layers, and at least one protruding portion 10a protruding upward from the dash panel 7 is removed and thinned, and the windshield panel 2 is pressed against the protruding portion 10a to engine room E. The sound transmitted from the upper part of the dash panel 7 is cut off and adhered to the dash panel 7 with an adhesive 8 to seal rain and wind from the outside.

  Here, the dash insulator 10 is a multi-layer having a thick base material portion 10b composed of several mat-like layers and a dense and dense thin skin portion 10c composed of at least one layer, and the protruding portion 10a is formed as a skin. Only the portion 10c is used. Therefore, since the thick base material portion is removed from the upper protruding portion 10a, the dash panel 10 inserted between the front end portion of the instrument panel 6 and the windshield panel 2 is thinned. The reaction force with the instrument panel 6 is reduced, the windshield panel 2 is not lifted, the assembly workability is improved, the number of parts is small, the price is low, and the projecting portion 10a and the windshield panel 2 are in contact with each other. The surface becomes wider and the sound insulation effect is great.

  In FIG. 2, the upper end portion of the dash insulator 10 of FIG. 1 is only the skin portion 10c to form a protruding portion 10a, in which a bellows-like portion 10d that is folded back and forth in the vertical direction of the vehicle 1 is formed. A vehicle sound insulation structure is shown. For this reason, when the windshield panel 2 is pressed to mount it, it does not have a large reaction force, has good workability, does not lift up, and is in perfect contact with the surface of the windshield panel 2 so that sound insulation is complete.

  Further, in FIG. 3, groove-shaped beads 10 e are formed at appropriate intervals so as to cross the peaks of the bellows-like portion 10 d, here the peaks on the front side of the vehicle 1. For this reason, it has a good followability with the windshield panel 2 even in a place where it is curved in a horizontal section, especially on both sides, and as shown in FIG. I can do it. Here, the groove-shaped bead 10e is formed only on the front side of the peak, but an attempt is made to improve the followability between the windshield panel 2 by providing it only on the rear side or on both the front and rear sides. Of course, it is possible to improve the sound insulation effect and workability.

It is principal part sectional drawing which shows the vehicle sound-insulation structure of the windshield panel vicinity which concerns on this invention. It is principal part sectional drawing which shows the modification of the vehicle sound-insulation structure which concerns on this invention shown in FIG. It is a principal part perspective view of the dash insulator of FIG. It is the principal part schematic of the vehicle which shows the position of the vehicle sound insulation structure of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Windshield panel 6 Instrument panel 7 Dash panel 10 Dash insulator 10a Projection part 10b Base material part 10c Skin part 10d Bellows part 10e Groove-shaped bead E Engine room R Crew room

Claims (3)

A passenger compartment side of the dash panel partitioning the engine room and the passenger compartment, equipped with a dashboard insulator, the front end portion of the instrument panel to be disposed an upper end of the dash insulator in an upper rear portion of the front Symbol dash panel In the vehicle sound insulation structure, which protrudes upward from between the dash panel and is mounted so that the windshield panel is in contact with the upper end,
The dash insulator is composed of a multilayer having a thick base portion and a thin skin portion, and the upper end portion is the skin portion . The skin portion of the upper portion of the vehicle sound insulation structure according to claim 1, characterized in that it has a bellows portion which is folded so as to stretch in the vertical direction of the vehicle. The vehicle sound insulation structure according to claim 2 , wherein groove-shaped beads are formed at appropriate intervals on the peaks of the bellows-shaped portion.

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