JP4637028B2 - Automobile dash silencer tensioning structure - Google Patents

Description

  The present invention relates to a structure for attaching a dash silencer provided for soundproofing a dash panel that partitions an engine room and a vehicle compartment of an automobile.

  As shown in the following Patent Documents 1 and 2, a dash silencer (soundproof mat) made of felt, urethane foam, or the like has been conventionally used for a steel plate dash panel that partitions an engine room and a vehicle compartment of an automobile. However, the noise level in the passenger compartment is reduced by absorbing and blocking noise such as engine noise.

In addition, since the dash panel has various shapes depending on the vehicle type, and the interior side surface is not flat and undulates in various irregularities, the dash silencer is provided in advance as shown in Patent Documents 3 and 4 below. By forming it into a three-dimensional concavo-convex shape by press molding and conforming to the shape of the interior side surface, the interior side surface of the dash panel is covered without any gap so that the soundproof performance is maintained.
JP-A-8-282402 JP 2001-138771 A JP-A-9-249080 JP-A-10-95283

By the way, when a dash silencer is stretched across the corner from the interior side of the dash panel to the side of the passenger compartment, there is a protruding part such as a tire house or an angle for reinforcing the vehicle body at the corner. The dash silencer has been cut and bent along the corner, but the dash silencer is wrinkled on the surface of the protrusion and there is a problem that there is a gap is there. In addition, since the part of the dash silencer is cut into pieces by this cut, there is a problem that the number of necessary portions of the fixing clip for fixing the dash silencer increases, and the tensioning tends to be incomplete.
In general, a dash silencer is preliminarily formed with a large number of openings such as openings and mounting holes for penetrating functional parts such as brake devices and wire harnesses. As a result, the position of the opening is likely to deviate from the positions of these functional components, and the problem of poor positioning and mounting workability arises.
The present invention seeks to provide an automotive dash silencer tensioning structure capable of solving such problems.

In order to solve the above-described problem, the dash silencer tensioning structure for an automobile according to claim 1 is formed by stretching the dash silencer across a corner from the interior side surface of the dash panel to the side surface of the passenger compartment. The protruding portion of the dash panel is covered with the dash silencer, and a bulging portion opposed to the protruding portion is formed into a three-dimensional concavo-convex shape on the dash silencer and a vertically long through hole is formed in the protruding portion. A folding line is formed in the dash silencer that extends linearly in the vertical direction from both end edges of the through-hole, and the dash silencer is bent inward with the folding line and the opposite inner edge of the through-hole is The dash silencer is tightly attached to the corner without any gap by being attached on the surface of the shape portion.
Further, the invention according to claim 2 is the above-described stretched structure of a dash silencer for automobiles, wherein the dash silencer is formed into a three-dimensional uneven shape in advance by cold press molding after preheating the felt. It is characterized in that the folding line is formed into a crushed shape during the intermediate press forming.
The invention according to claim 3 is characterized in that, in the stretched structure of the automobile dash silencer, when the outer shape of the dash silencer is trimmed by the cutout mold, a through hole is opened by the cutout mold. To do.
According to a fourth aspect of the present invention, the dash silencer has a sound insulation layer made of a synthetic resin sheet on the surface of a sound absorbing material layer made of felt. Features.

  A dash silencer can be attached to a corner with a protrusion without wrinkles or gaps. For this reason, the installation work is facilitated and the desired soundproof performance is maintained.

  FIG. 1 is a perspective view of a dash panel when the dash silencer is not attached, as viewed from the vehicle interior, and FIG. 2 is a longitudinal sectional view of the vehicle body to which the dash silencer 1 is attached. In the figure, reference numeral 2 denotes a steel-made dash panel that partitions the engine room 3 and the vehicle compartment 4, and the dash panel has various shapes for providing a steering, a brake device, various pipes and the like in a penetrating manner. Are formed into a complicated three-dimensional concavo-convex shape for mounting. Reference numeral 5 denotes a stud bolt protruding from the interior side surface of the dash panel 2 in order to attach the dash silencer 1 to the interior side surface of the dash panel 2. Reference numeral 6 denotes a substantially spherical projecting portion projecting from the interior side surface of the dash panel 1 to the vehicle interior side surface 7 in a substantially orthogonal corner 8 for piping and vehicle body reinforcement. Reference numeral 9 denotes a stud bolt projecting from the passenger compartment side surface 7.

3 is a front view of the entire dash silencer 1 according to the present invention, and FIG. 4 is an enlarged perspective view of one side edge portion thereof. The dash silencer 1 has a thick and thin portion mixed together by spreading a binder resin on fiber scraps gathered in a mat shape, heating it, setting it in a predetermined mold, and press molding. Are partially different (thickness of 3 to 30 mm), and are formed into a three-dimensional uneven shape corresponding to the uneven shape of the interior side surface of the dash panel 2, and the bulging portion 10 facing the protruding portion 6 at that time is three-dimensional. It is formed into an uneven shape. Then, the outer shape of the dash silencer 1 is trimmed by a cutting die, and a vertically long through hole 11 is formed in the bulging portion 10 simultaneously with the trimming by the cutting die. (See FIGS. 4 and 5).
Further, the mounting hole 12, the rectangular brake device through hole 13, and the like are also opened at the time of this trimming.

  Reference numerals 14a and 14b denote folding curves formed so as to extend linearly in the vertical direction from both end edges of the through-hole 11 during the press molding. As shown in FIG. 6, the folding lines 14 a and 14 b are formed by crushing the corresponding portion in a thin shape in the press molding process, and by forming the folding curve, the folding curves 14 a and 14 b are formed outwardly from the folding curve. The side edge portion 15 is made flexible.

  When the dash silencer 1 configured in this way is attached to the dash panel 2, the side edge 15 is made substantially perpendicular to the inner side from the folding lines 14a and 14b so that the protruding portion 6 is covered by the bulging portion 10. The side edges 15 are applied to the side surface 7 of the passenger compartment, and the folding curves 14a and 14b are made to coincide with the corner 8. At this time, the opposite inner edges of the through holes 11 are bonded together on the surface of the projecting portion 6, whereby the dash silencer 1 can be attached to the corner 8 without a gap. The both side edges of the dash silencer 1 are attached to the dash panel 2 in this way. Then, the stud bolts 5 and 9 are respectively inserted into the mounting holes 12 formed at the corresponding positions, and in this state, the fixing clips 16 and 17 are engaged with the stud bolts 5 and 9 so that the dash silencer 1 has a dash. Detachment from the panel 2 surface is prevented. As a result, as shown in FIG. 7, the dash silencer 1 can be stretched between the interior side surface of the dash panel 2 and the vehicle interior side surface 7 without a gap.

  As described above, according to the present invention, the dash silencer 1 can be attached to the corner 8 having the protrusion 6 without wrinkles or gaps. For this reason, attachment work becomes easy and the dash panel 2 is covered without any wrinkles, and the desired soundproof performance can be exhibited.

  The dash silencer 1 is a laminate in which a felt is used as a sound absorbing material layer as described above, and a sound insulating material layer made of a synthetic resin sheet such as an ethylene propylene copolymer (EPDM) or an olefin resin sheet is provided on the surface thereof. It is also possible to use a body, and it is possible to obtain a further soundproofing effect by sticking so that the sound insulating material layer comes to the passenger compartment side.

The perspective view which looked at the dash panel when the dash silencer which concerns on this invention is not stuck from the vehicle interior. The longitudinal cross-sectional view of the vehicle body which stuck the dash silencer which concerns on this invention. The front view of the whole dash silencer concerning the present invention. The expansion perspective view of one side edge part of the dash silencer concerning the present invention. AA line sectional view of Drawing 3. BB sectional drawing of FIG. The perspective view when the dash silencer concerning the present invention is stuck.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dash silencer 2 Dash panel 5 Stud bolt 6 Protruding part 7 Car compartment side surface 8 Corner 10 Expansion part 11 Through-hole 12 Mounting hole 14a, 14b Folding curve 15 Side edge part

Claims (4)

  A dash silencer is stretched across a corner from the interior side surface of the dash panel to the side surface of the passenger compartment, and the projection of the dash panel formed at the corner is covered by the dash silencer. The bulging part opposite to the projecting part is formed into a three-dimensional concavo-convex shape, and a vertically long through hole is formed in the bulging part, and folding lines extending linearly in the vertical direction from the both end edges of the through hole are respectively provided. The dash silencer is formed in the dash silencer, folded inward with the folding curve, and the inner edges of the through holes are joined to each other on the surface of the projecting portion so that the dash silencer is securely attached to the corner. A dash silencer tension structure for automobiles.   The dash silencer is preliminarily molded into a three-dimensional concavo-convex shape by cold press molding after preheating the felt, and the folding line is molded into a collapsed shape during the cold press molding. The tension structure of the automobile dash silencer described.   The stretch structure of a dash silencer for an automobile according to claim 1 or 2, wherein a through hole is opened by the cutout die when trimming the outer shape of the dash silencer with the cutout die.   The dash silencer is provided with a sound insulation material layer made of a synthetic resin sheet on a surface of a sound absorption material layer made of felt.

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