JP2010234896A - Laying interior material for vehicle and vehicle floor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laying interior material for a vehicle that can suppress the lowering of a transmission loss by improving following ability with respect to a vehicle body panel and appearance even if forming accuracy is low. <P>SOLUTION: An interior material (floor carpet 2) is the laying interior material for the vehicle which is laid over a vehicle body panel 3, and includes a sound insulation layer 10 that contains a magnetic body 12 and has gather parts 14a to 14j with are extendable and contractable. A sound absorbing layer 9 is preferably laminated on at least one of an upper surface side of the vehicle body panel and a lower surface side of the sound insulation layer. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a laying interior material for a vehicle and a vehicle floor structure, and more specifically, a vehicle capable of suppressing a decrease in transmission loss by improving followability and appearance to a vehicle body panel even when molding accuracy is low. The present invention relates to a laying interior material and a vehicle floor structure.

  2. Description of the Related Art Conventionally, as a vehicle floor structure, a vehicle floor structure in which vehicle interior materials such as a floor carpet and a dash silencer are laid on a vehicle body panel is generally known (see, for example, Patent Document 1).

  As a conventional vehicle floor structure 101, for example, as shown in FIG. 13, a sound absorbing layer 109 made of felt or the like is interposed between a vehicle body panel 103 and a sound insulating layer of a floor carpet 102 is known. . Further, as another conventional vehicle floor structure 121, for example, as shown in FIG. 14, a sound absorbing layer 129 made of felt or the like is interposed between a vehicle body panel 123 and a sound insulating layer of a dash silencer 122. Are known. In these vehicle floor structures 101 and 121, vibration damping of spring mass resonance is achieved by stacking high-breathable sound absorbing layers 109 and 129 (corresponding to springs) and non-breathable or low-breathing sound insulating layers (corresponding to masses). The area is used to improve transmission loss and improve soundproofing.

  However, in the conventional vehicle floor structures 101 and 121, a plurality of air layers S are provided between the vehicle body panels 103 and 123 and the sound insulation layer in consideration of the workability of assembling the floor carpet 102 and the dash silencer 122. It has been. Therefore, in these air layers S, the damping action by the sound absorbing layers 109 and 129 does not occur and the transmission loss is reduced. In particular, the current situation is that it is not possible to improve in-vehicle noise at a medium frequency (for example, 100 to 400 Hz, etc.) entering the vehicle through the air layer S.

  Here, as a conventional soundproofing material, a soft magnetic material is provided on the surface of the soundproofing material, and the soundproofing material is attached to the adherend by the magnetic force of the soft magnetic material (for example, Patent Document 2). reference). Then, it is conceivable that this conventional soundproofing material is laid in close contact with the vehicle body panel to eliminate the air layer and suppress the reduction in transmission loss.

  However, in the conventional vehicle floor structures 101 and 121, the vehicle body panels 103 and 123 have a complicated surface shape, and a plurality of sound absorptions are provided between the vehicle body panels 103 and 123 and the sound insulating material (sound insulation layer). Since the layers 109 and 129 are partially disposed, the soundproof material is required to have extremely high molding accuracy in order to cause the soundproof material to follow the vehicle body panels 103 and 123. On the other hand, when the molding accuracy of the soundproofing material is low, it becomes difficult to make the soundproofing material follow the main body panel, and the appearance of the soundproofing material becomes poor due to wrinkles on the surface side of the soundproofing material.

Japanese Patent Laid-Open No. 2007-276781 Japanese Patent Laid-Open No. 2001-312281

  The present invention has been made in view of the above-mentioned present situation, and is a laying interior material for a vehicle that can improve followability and appearance to a vehicle body panel and suppress a decrease in transmission loss even when molding accuracy is low. And it aims at providing a vehicle floor structure.

The present invention is as follows.
1. A laying interior material for a vehicle that is laid on a vehicle body panel and includes a sound insulation layer that includes a magnetic body and has a gatherable portion that can be expanded and contracted.
2. The sound absorbing layer is laminated on at least one of the upper surface side of the vehicle body panel and the lower surface side of the sound insulation layer. The interior laying material for vehicles as described.
3. The said gather part is provided in the said sound-insulation layer so that the ridgeline of the convex part provided in the said vehicle body panel may be followed. Or 2. The interior laying material for vehicles described in 2.
4). The gathers portion is provided on the sound insulation layer so as to be positioned below a seat provided on the vehicle body panel. To 3. The interior laying material for vehicles as described in any one of these.
5). Carpet skin is provided on the upper surface side of the sound insulation layer. To 4. The interior laying material for vehicles as described in any one of these.
6). Above 1. To 5. A vehicle floor structure comprising: the laying interior material for a vehicle according to any one of the above and a vehicle body panel on which the laying interior material for the vehicle is laid.

According to the vehicle laying interior material and the vehicle floor structure of the present invention, the sound insulation layer includes a magnetic body and has a gatherable portion that can be expanded and contracted, so that the sound insulation layer is in close contact with the vehicle body panel by the magnetic force of the magnetic body. In addition, surplus portions such as wrinkles of the sound insulation layer are absorbed by expansion and contraction of the gather portion. Thereby, even if it is a case where the shaping | molding precision of the laying interior material for vehicles is low, the followable | trackability and appearance with respect to a vehicle body panel can be improved, and the fall of a transmission loss can be suppressed. In particular, since the air layer between the vehicle body panel and the laying interior material for the vehicle can be eliminated or reduced, a decrease in transmission loss at medium frequencies (for example, 100 to 400 Hz) can be suppressed.
Further, when a sound absorbing layer is laminated on at least one of the upper surface side of the vehicle body panel and the lower surface side of the sound insulating layer, the soundproofing property can be enhanced by the sound absorbing effect of the sound absorbing layer.
Further, when the gather portion is provided in the sound insulation layer so as to follow the ridge line of the convex portion provided in the vehicle body panel, the gather portion shrinks when the sound insulation layer is laid on the vehicle body panel, and the standing wall Since it becomes a shape, the ridgeline of the convex portion stands out and a high-class feeling is given, and the appearance can be further enhanced.
Further, when the gathering portion is provided in the sound insulation layer so as to be positioned on the lower side of the seat provided in the vehicle body panel, the gather portion is disposed on the seat when the sound insulation layer is laid on the vehicle body panel. Since it is difficult to see behind the screen, the appearance can be further enhanced.
Furthermore, when the carpet skin is provided on the upper surface side of the sound insulation layer, it is possible to improve the followability and appearance of the floor carpet to the vehicle body panel and to suppress a decrease in transmission loss.

The present invention will be further described in the following detailed description with reference to the drawings referred to, with reference to non-limiting examples of exemplary embodiments according to the present invention. Similar parts are shown throughout the several figures.
1 is a longitudinal sectional view schematically showing a vehicle floor structure according to a first embodiment. It is a principal part enlarged view of FIG. It is explanatory drawing for demonstrating the effect | action of the floor carpet which concerns on Example 1. FIG. It is a longitudinal cross-sectional view which shows the said floor carpet typically. It is a graph which shows the noise evaluation (road noise of a front seat) of the vehicle floor structure concerning Example 1 and a comparative example. It is a graph which shows the noise evaluation (road noise of a rear seat) of the vehicle floor structure which concerns on Example 1 and a comparative example. FIG. 5 is a longitudinal sectional view schematically showing a vehicle floor structure according to a second embodiment. It is a principal part enlarged view of FIG. It is a longitudinal cross-sectional view which shows the floor carpet of another form. Furthermore, it is a longitudinal cross-sectional view which shows the floor carpet of another form. It is a longitudinal cross-sectional view which shows the vehicle floor structure of another form typically. It is a longitudinal cross-sectional view which shows the dash silencer of another form typically. It is a longitudinal cross-sectional view which shows the conventional vehicle floor structure typically. It is a longitudinal cross-sectional view which shows the other conventional vehicle floor structure typically.

  The items shown here are exemplary and illustrative of the embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

1. Vehicle laying interior material Embodiment 1 The laying interior material for a vehicle according to the above is a laying interior material for a vehicle that is laid on a vehicle body panel, and includes a sound insulation layer that includes a magnetic body and has a gatherable portion that can be expanded and contracted. The use of the vehicle interior material is not particularly limited, and examples of the vehicle interior material include a carpet and a dash silencer.

  The configuration, shape, size and the like of the “body panel” are not particularly limited. This body panel is usually made of metal. The thickness of the vehicle body panel can be, for example, 0.6 to 1.2 mm (preferably 0.8 to 1.0 mm). Moreover, this vehicle body panel can have a convex part and / or a standing wall, for example. This convex part can be a cross member part extended in the width direction of a vehicle, for example. Moreover, as this standing wall, a heel kick part, a dash panel part, etc. can be mentioned, for example.

  The configuration, shape, size, material, etc. of the “sound insulation layer” are not particularly limited. One side of the sound insulation layer is in contact with the vehicle body panel. Examples of the sound insulation layer include (1) a form using a rubber sheet, a resin sheet, and the like, and (2) a form using a felt, a resin foam, a nonwoven fabric, and the like.

In the form (1), the sound insulation layer usually has non-breathability. Further, the (1) in the form, the density of the sound insulation layer, for example, can 100~6000g / cm ³ (preferably 200~5100g / cm ³⁾ is. Moreover, in the said (1) form, the thickness of the said sound-insulation layer can be 0.5-3.5 mm (preferably 1.0-3.0 mm), for example. Further, in the form (1), examples of the material of the rubber sheet include ethylene-propylene-diene rubber (EPDM). Examples of the material for the resin sheet include polyvinyl chloride and ethylene vinyl acetate (EVA).

In the form (2), the sound insulation layer usually has non-breathability or low breathability. The air permeability of the sound insulation layer having low air permeability is, for example, 3 to 30 cc / cm ² · sec (preferably 5 to 5) when measured according to JIS L 1096 8.27.1 [A method (fragile type method)]. 25 cc / cm ² · sec). Further, in the above (2) form, the density of the sound insulation layer, for example, can 200~1500g / cm ³ (preferably 300~1000g / cm ³⁾ is. Moreover, in the said (2) form, the thickness of the said sound insulation layer can be 0.5-8.0 mm (preferably 1.0-5.0 mm), for example. Furthermore, in the form (2), examples of the felt material include polyester fiber, polyamide fiber, and acrylic fiber. Examples of the material of the resin foam include polyurethane resin and polyolefin resin. Furthermore, when using the said nonwoven fabric, the sound-insulation layer can be formed by laminating a plurality of nonwoven fabrics, for example.

  For example, a carpet skin can be provided on the upper surface side of the sound insulation layer (see, for example, FIG. 4). Examples of the carpet skin include (1) a form in which a nonwoven fabric is fluffed by needle punching, and (2) a form in which pile yarn is planted on a base fabric by a tuft machine.

  The configuration, shape, size, material and the like of the “magnetic body” are not particularly limited. For example, when the sound insulating layer is 100% by mass, the magnetic body can contain 5 to 50% by mass (preferably 10 to 30% by mass) of the magnetic material in the sound insulating layer. In addition, the magnetic body may be included only in a portion that contacts the upper surface side of the vehicle body panel of the sound insulating layer, for example, but it is preferable that the magnetic body is included in substantially the entire sound insulating layer. This is because the production efficiency of the sound insulation layer can be increased. Examples of the magnetic material include alnico magnets, ferrite magnets, samarium cobalt magnets, neodymium iron boron magnets, and samarium iron nitrogen magnets. Moreover, as a shape of a magnetic body, powder form, a granular form, fibrous form etc. can be mentioned, for example. When the sound insulation layer is made of felt or non-woven fabric, it is preferable to use a fibrous magnetic material. This is because the magnetic body can be reliably held in the sound insulation layer.

  The configuration, shape, size, etc. of the “gather part” are not particularly limited. The gather portion extends, for example, along the width direction of the vehicle, and can be expanded and contracted in a direction intersecting the width direction (for example, the front-rear direction of the vehicle). Moreover, the gather part can protrude toward the vehicle body panel side, for example. In this case, the protrusion height (h1) of the gather portion can be, for example, 3 to 20 mm (preferably 5 to 15 mm) (see, for example, FIG. 3). Moreover, the gather part can protrude toward the opposite side to the vehicle body panel, for example. In this case, the protrusion height (h2) of the gather portion can be, for example, 3 to 20 mm (preferably 5 to 15 mm) (see, for example, FIG. 3).

  As the gather part, for example, (1) a form (for example, see FIG. 2) provided on the sound insulation layer along the ridge line of a convex part (for example, a cross member part) provided on the vehicle body panel, 2) The form (for example, refer FIG. 1) etc. which are provided in the sound insulation layer so that it may be located under the seat provided in the vehicle body panel can be mentioned. In the configuration (2), for example, the gather portion can be located in the projection plane of the seat with respect to the vehicle body panel.

  Here, for example, a sound absorbing layer may be laminated on at least one of the upper surface side of the vehicle body panel and the lower surface side of the sound insulation layer.

The “sound absorbing layer” usually has air permeability. The air flow rate is, for example, 20 to 100 cc / cm ² · sec (preferably 30 to 80 cc / cm ² · sec) when measured according to JIS L 1096 8.27.1 [Method A (Fragile type method)]. Can be. The density of the sound absorbing layer can be, for example, 0.01 to 0.15 g / cm ³ (preferably 0.03 to 0.10 g / cm ³ ). The sound absorbing layer can be made of various felts, resin foams, nonwoven fabrics, and the like. Examples of the felt material include polyester fiber, polyamide fiber, and acrylic fiber. Examples of the material of the resin foam include polyurethane resin and polyolefin resin. Furthermore, when using the said nonwoven fabric, the sound-insulation layer can be formed by laminating a plurality of nonwoven fabrics, for example.

  When the sound absorbing layer is provided as described above, the gather portion protrudes toward the vehicle body panel side, for example, in a facing space between the side surface of the convex portion provided on the vehicle body panel or the wall surface of the standing wall and the side end surface of the sound absorbing layer. It can be provided in the sound insulation layer so as to be located. Thereby, an air layer can be eliminated or reduced more reliably in the facing space between the convex portion or the standing wall and the sound absorbing layer.

2. Vehicle floor structure Embodiment 2 The vehicle floor structure according to the first embodiment is the same as the first embodiment. And the vehicle body panel on which the vehicle interior material is laid. This vehicle floor structure can further include, for example, the sound absorbing layer disposed between the vehicle body panel and the sound insulating layer of the vehicle interior material.

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

<Example 1>
(1) Configuration of Vehicle Floor Structure As shown in FIG. 1, the vehicle floor structure 1 according to the first embodiment includes a floor carpet 2 (illustrated as “a vehicle interior material” according to the present invention), and this. A metal body panel 3 on which the floor carpet 2 is laid.

  The vehicle body panel 3 is provided with a plurality of (two in FIG. 1) convex cross member portions 5 extending along the width direction of the vehicle at the center in the longitudinal direction A of the vehicle. Rails (not shown) extending in the longitudinal direction A of the vehicle are suspended on these cross member portions 5, and a front seat 6a is slidably provided along these rails. The vehicle body panel 3 is provided with a standing wall-like dash panel portion 7 on the front side of the vehicle, and a standing wall-like heel kick portion 8 is provided on the rear side of the vehicle. Further, a plurality of sound absorbing layers 9 (three in FIG. 1) are partially laminated on the vehicle body panel 3 so as to avoid the cross member portion 5, the dash panel portion 7 and the heel kick portion 8. Each of the sound absorbing layers 9 is made of felt and has air permeability.

(2) Configuration of Floor Carpet As shown in FIG. 4, the floor carpet 2 according to the first embodiment includes a non-breathable sound insulating layer 10 made of a resin sheet made of polyvinyl chloride, and on the sound insulating layer 10. It has a bonded carpet skin 11. The entire planar surface of the sound insulation layer 10 includes a powdered magnetic body 12 (for example, powder of alnico magnet). When the sound insulating layer 10 is 100% by mass, the sound insulating layer 10 includes about 30% by mass of the magnetic body 12. The carpet skin 11 is made by fluffing a nonwoven fabric by needle punching.

  As shown in FIGS. 1 and 2, the sound insulating layer 10 extends along the width direction of the vehicle (the paper surface direction of FIG. 1) and can be expanded or contracted in the vehicle front-rear direction A (in FIG. 1). Eight) gathers 14a to 14j are provided. The gather portion 14a is provided in the sound insulation layer 10 so as to protrude toward the vehicle body panel 3 and to be positioned at a facing interval between the wall surface of the dash panel portion 7 and the side end surface of the sound absorption layer 9. Further, the gather portions 14b, 14e, 14f, and 14i protrude toward the vehicle body panel 3 and are located on the sound insulating layer 10 so as to be located at a facing distance between the side surface 5a of the cross member portion 5 and the side end surface 9a of the sound absorbing layer 9. Is provided. Further, the gather portion 14j is provided on the sound insulating layer 10 so as to protrude toward the vehicle body panel 3 side and to be located at a facing interval between the wall surface of the heel kick portion 8 and the side end surface of the sound absorbing layer 9. Further, the gather portions 14 c, 14 d, 14 g, and 14 h are provided on the sound insulating layer 10 so as to protrude toward the opposite side of the vehicle body panel 3 and along the ridge line 5 b of the cross member portion 5. Moreover, the gather parts 14c, 14d, 14e, 14f, 14g, and 14h are provided in the sound insulation layer 10 so as to be positioned below the front seat 6a. Further, the protruding height h1 of the gather portions 14a, 14b, 14e, 14f, 14i, 14j is about 5 mm (see FIG. 3). Further, the protruding height h2 of the gather portions 14c, 14d, 14g, and 14h is about 3 mm (see FIG. 3).

(3) Action of Vehicle Floor Structure Next, the action of the vehicle floor structure 1 having the above configuration will be described. As shown in FIG. 3, when the floor carpet 2 is laid on the vehicle body panel 3, the sound insulation layer 10 of the floor carpet 2 is brought into close contact with the vehicle body panel 3 by the magnetic force of the magnetic body 12, as shown in FIG. In addition, surplus portions such as wrinkles of the sound insulation layer 10 are absorbed by expansion / contraction of the gather portions 14a to 14j. When the floor carpet 2 is laid, in the vicinity of the cross member portion 5, the gather portions 14b, 14e, 14f, 14i expand in the vehicle front-rear direction A, and the gather portions 14c, 14d, 14g, 14h extend in the vehicle front-rear direction. It will be reduced to A.

(4) Noise Evaluation of Vehicle Floor Structure According to Example 1 and Comparative Example Next, noise evaluation between the vehicle floor structure 1 according to Example 1 and the vehicle floor structure according to the comparative example will be described. As a vehicle floor structure according to the comparative example, as shown in FIG. 13, a floor carpet 102 is laid on a vehicle body panel 103 via a sound absorbing layer 109, and a cross between the vehicle body panel 103 and the floor carpet 102 is formed. A structure 101 in which an air layer S is formed on the member portion 105, the dash panel portion, and the heel kick portion 108 is employed.

  In the vehicle floor structures 1, 101, a microphone (not shown) is installed in the vicinity of the position of a human ear that gets on the front seat 6 a and the rear seat 6 b. Then, an automobile having the vehicle floor structure 1, 101 was driven on a rough road at a speed of 60 km / h, and the frequency characteristic of the noise level (dB) of the 1/3 octave band at that time was measured with the microphone. As a result, as shown in FIG. 5, in the front seat 6a of the vehicle floor structure 1 of the first embodiment, noise at a medium frequency (particularly 200 to 400 Hz) is compared with the front seat 6a of the vehicle floor structure 101 of the comparative example. It can be seen that the level is decreasing. Further, as shown in FIG. 6, in the rear seat 6b of the vehicle floor structure 1 of the first embodiment, compared with the rear seat 6b of the vehicle floor structure 101 of the comparative example, the noise level at a medium frequency (especially 250 to 400 Hz). It can be seen that is decreasing.

(5) Effects of Example According to the floor carpet 2 of Example 1, the sound insulating layer 10 includes the magnetic body 12 and has the gatherable portions 14a to 14j that can be expanded and contracted. The sound insulating layer 10 is brought into contact with the upper portion in close contact, and surplus portions such as wrinkles of the sound insulating layer 10 are absorbed by expansion and contraction of the gather portions 14a to 14j. Thereby, even if it is a case where the shaping | molding precision of the floor carpet 2 is low, the followable | trackability and appearance with respect to the vehicle body panel 3 can be improved, and the fall of a transmission loss can be suppressed. In particular, since the air layer between the vehicle body panel 3 and the floor carpet 2 can be eliminated or reduced, it is possible to suppress a decrease in transmission loss at medium frequencies (for example, 100 to 400 Hz).

  In the first embodiment, since the sound absorbing layer 9 is laminated on the upper surface side of the vehicle body panel 3, the soundproofing property can be enhanced by the sound absorbing effect of the sound absorbing layer 9.

  Further, in the first embodiment, the gather portions 14c, 14d, 14g, and 14h are provided on the sound insulation layer 10 along the ridge line 5b of the cross member portion 5 of the vehicle body panel 3, so that the sound insulation is provided on the vehicle body panel 3. When the layer 10 is laid, the gather portions 14c, 14d, 14g, and 14h are contracted to form a standing wall, so that the ridge line 5b of the cross member portion 5 is conspicuously given a high-class feeling and the appearance can be further enhanced.

  In the first embodiment, the gather portions 14c, 14d, 14e, 14f, 14g, and 14h are provided on the sound insulation layer 10 so as to be positioned below the front seat 6a provided on the vehicle body panel 3. When the sound insulation layer 10 is laid on the vehicle body panel 3, the gather portions 14c, 14d, 14e, 14f, 14g, and 14h are hidden under the front seat 6a and are difficult to see, so that the appearance can be further enhanced.

  Further, in the first embodiment, the gather portions 14b, 14e, 14f, and 14i protrude toward the vehicle body panel 3 side, and are opposed to the side surface 5a of the cross member portion 5 of the vehicle body panel 3 and the side end surface 9a of the sound absorbing layer 9. Since the sound insulating layer 10 is provided so as to be positioned in the space, the air layer in the space between the cross member portion 5 and the sound absorbing layer 9 can be eliminated or reduced more reliably.

  In the first embodiment, the gather portions 14 a and 14 j protrude toward the vehicle body panel 3 side, and the wall surfaces of the dash panel portion 7 and the heel kick portion 8 of the vehicle body panel 3 and the side end surface 9 a of the sound absorbing layer 9 are opposed to each other. Since the sound insulating layer 10 is provided so as to be located in the space, the air layer in the space between the dash panel portion 7 and the heel kick portion 8 and the sound absorbing layer 9 can be eliminated or reduced more reliably.

  Furthermore, in the first embodiment, since the carpet skin 11 is provided on the upper surface side of the sound insulating layer 10, it is possible to improve the followability and appearance of the floor carpet 2 with respect to the vehicle body panel 3 and to suppress a decrease in transmission loss. .

<Example 2>
(1) Configuration of Vehicle Floor Structure As shown in FIG. 7, a vehicle floor structure 21 according to the second embodiment includes a dash silencer 22 (illustrated as “a laying interior material for a vehicle” according to the present invention), and this. And a metal body panel 23 on which a dash silencer 22 is laid.

  A plurality of sound absorbing layers 29 (two in FIG. 7) are partially stacked on the vehicle body panel 23. Each of the sound absorbing layers 29 is made of felt and has air permeability.

(2) Configuration of Dash Silencer As shown in FIG. 8, the dash silencer 22 according to the second embodiment includes a non-breathable sound insulation layer 30 made of an EPDM rubber sheet. The entire planar surface of the sound insulating layer 30 includes a powdered magnetic body 32 (for example, powder of alnico magnet). When the sound insulating layer 30 is 100% by mass, the sound insulating layer 30 includes about 30% by mass of the magnetic body 32.

  As shown in FIG. 7, the sound insulation layer 30 extends along the width direction of the vehicle (paper surface direction in FIG. 7), and a plurality of (4 in FIG. 7) that can be expanded and contracted in the direction orthogonal to the width direction. Pieces of gathering portions 34 are provided. The gathers 34 are provided on the sound insulation layer 30 so as to protrude toward the opposite side of the vehicle body panel 23 and along the ridge line 29 a of the sound absorption layer 29.

(3) Operation of Vehicle Floor Structure Next, the operation of the vehicle floor structure 21 having the above configuration will be described. When the dash silencer 22 is laid on the vehicle body panel 23, as shown in FIG. 7, the sound insulation layer 30 of the dash silencer 22 is brought into close contact with the vehicle body panel 23 by the magnetic force of the magnetic body 32. Excess portions such as wrinkles of the sound insulating layer 30 are absorbed by the expansion / contraction.

(4) Effects of Example According to the dash silencer 22 of Example 2, the sound insulation layer 30 includes the magnetic body 32 and has the gatherable portion 34 that can be expanded and contracted. The sound insulation layer is brought into contact in a close contact state, and surplus portions such as wrinkles of the sound insulation layer 30 are absorbed by the expansion and contraction of the gather portion 34. Thereby, even if it is a case where the shaping | molding precision of the dash silencer 22 is low, the followable | trackability and appearance with respect to the vehicle body panel 23 can be improved, and the fall of a transmission loss can be suppressed. In particular, since the air layer between the vehicle body panel 23 and the dash silencer 22 can be eliminated or reduced, it is possible to suppress a decrease in transmission loss at medium frequencies (for example, 100 to 400 Hz).

  In the second embodiment, since the sound absorbing layer 29 is laminated on the upper surface side of the vehicle body panel 23, the soundproofing property can be enhanced by the sound absorbing effect of the sound absorbing layer 29.

  Further, in the second embodiment, since the sound insulation layer 30 is brought into close contact with the vehicle body panel 23 by the magnetic force of the magnetic body 32, it is joined to the vehicle body panel 123 like a conventional dash silencer 122 (see FIG. 14). Magic tape 147 (registered trademark; hook and loop fastener) and clip 148 are not required, and the number of parts can be reduced.

  In the present invention, the present invention is not limited to the first and second embodiments, and various modifications can be made within the scope of the present invention depending on the purpose and application. In other words, in the first embodiment, the gather portions 14c, 14d, 14g, and 14h provided along the ridge line 5b of the cross member portion 5 are exemplified, but the present invention is not limited thereto. For example, as shown in FIG. The gather portion 14 ′ extending in the vehicle width direction on the upper surface of the cross member portion 5 or the gather portion extending in the vehicle width direction on the side surface of the cross member portion can be used.

  Moreover, in the said Example 1 and 2, although the form formed by laminating | stacking the sound absorption layers 9 and 29 on the vehicle body panels 3 and 23 was illustrated, it is not limited to this, For example, as shown in FIG. The sound absorbing layer 9 (29) may be laminated on the lower surface side of 10 (30).

  Moreover, in the said Example 2, although the form which provides the gather part 34 in the site | part which contacts the sound absorption layer 29 of the sound insulation layer 30 was illustrated, it is not limited to this, For example, as shown in FIG. You may make it provide the gather part 34 'in the site | part which contacts the vehicle body panel 23. FIG.

  Moreover, in the said Example 2, although the sound insulation layer 30 which consists of a rubber sheet made from EPDM was illustrated, it is not limited to this, For example, as shown in FIG. 12, it is good also as a sound insulation layer 30 'which consists of a high density felt. . In this case, the fiber (magnetic body 32 ') formed from a resin mixed with a powdered magnetic body can be mixed with the felt by a needle punch or the like.

  Furthermore, in the said Example 1 and 2, although the single folding gather parts 14 and 34 were illustrated, it is not limited to this, For example, it is good also as a gathering part folded in two or more.

  The foregoing examples are for illustrative purposes only and are not to be construed as limiting the invention. Although the invention has been described with reference to exemplary embodiments, it is to be understood that the language used in the description and illustration of the invention is illustrative and exemplary rather than limiting. As detailed herein, modifications may be made in its form within the scope of the appended claims without departing from the scope or spirit of the invention. Although specific structures, materials and examples have been referred to in the detailed description of the invention herein, it is not intended to limit the invention to the disclosure herein, but rather, the invention is claimed. It covers all functionally equivalent structures, methods and uses within the scope of.

  The present invention is not limited to the embodiments described in detail above, and various modifications or changes can be made within the scope of the claims of the present invention.

  In addition to passenger cars, buses, trucks, etc., it is widely used as a technology for laying interior materials for vehicles laid on body panels of railway vehicles such as trains and trains, construction vehicles, agricultural vehicles, and industrial vehicles.

  1, 21; vehicle floor structure, 2; floor carpet, 3, 23; body panel, 5; cross member part, 6a; front seat, 9, 29; sound absorbing layer, 10, 30; 12, 32; Magnetic body, 14a-14j, 14 ', 34, 34'; Gather part, 22; Dash silencer.

Claims (6)

A vehicle interior material laid on a vehicle body panel,
A laying interior material for a vehicle comprising a sound insulation layer including a magnetic body and having a gatherable portion that can be expanded and contracted.   The laying interior material for a vehicle according to claim 1, wherein a sound absorbing layer is laminated on at least one of an upper surface side of the vehicle body panel and a lower surface side of the sound insulation layer.   The laying interior material for a vehicle according to claim 1, wherein the gather portion is provided in the sound insulation layer along a ridge line of a convex portion provided in the vehicle body panel.   The laying interior material for a vehicle according to any one of claims 1 to 3, wherein the gather portion is provided in the sound insulation layer so as to be positioned on a lower side of a seat provided in the vehicle body panel.   The laying interior material for a vehicle according to any one of claims 1 to 4, wherein a carpet skin is provided on an upper surface side of the sound insulation layer. The laying interior material for a vehicle according to any one of claims 1 to 5,
A vehicle floor structure comprising: a vehicle body panel on which the vehicle laying interior material is laid.

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