WO2014097617A1 - Matériau pour intérieur de véhicule - Google Patents

Matériau pour intérieur de véhicule Download PDF

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Publication number
WO2014097617A1
WO2014097617A1 PCT/JP2013/007405 JP2013007405W WO2014097617A1 WO 2014097617 A1 WO2014097617 A1 WO 2014097617A1 JP 2013007405 W JP2013007405 W JP 2013007405W WO 2014097617 A1 WO2014097617 A1 WO 2014097617A1
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WO
WIPO (PCT)
Prior art keywords
sound absorbing
absorbing material
slit
sound
cut
Prior art date
Application number
PCT/JP2013/007405
Other languages
English (en)
Japanese (ja)
Inventor
立木　智博
明夫 篠宮
Original Assignee
河西工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2012276760A external-priority patent/JP5961104B2/ja
Priority claimed from JP2013171235A external-priority patent/JP2015039929A/ja
Priority claimed from JP2013257049A external-priority patent/JP6059650B2/ja
Application filed by 河西工業株式会社 filed Critical 河西工業株式会社
Publication of WO2014097617A1 publication Critical patent/WO2014097617A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation

Definitions

  • the present invention relates to an interior material for a vehicle represented by a door trim or a roof trim of an automobile.
  • Patent Document 1 In the interior material for a vehicle that covers and arranges the panel surface on the vehicle compartment side of the automobile, for example, as shown in Patent Document 1, on the back surface of a molded synthetic resin trim material It is known that a sound absorbing material is provided so that noise outside the vehicle is absorbed by the sound absorbing material so as to suppress the transmitted sound into the passenger compartment.
  • the present invention provides an interior material for a vehicle that can improve the sound absorbing performance without increasing the thickness of the sound absorbing material and using an expensive sound absorbing material.
  • the interior material for a vehicle according to the present invention includes a sound absorbing material made of a porous material on the back surface of the trim material, and a slit is provided in the sound absorbing material, and the surface of the sound absorbing material is formed using the slit as an uneven source.
  • the main feature is that it is formed in an uneven shape.
  • the surface of the sound-absorbing material is made uneven by using the slit as an uneven source, so that the surface area for absorbing the sound of the sound-absorbing material is increased.
  • a back air layer serving as a sound absorbing layer can be formed between the two.
  • FIG. 2 is a cross-sectional explanatory view taken along line AA in FIG. 1.
  • FIG. 2 is an enlarged cross-sectional explanatory view taken along line BB in FIG. 1.
  • Explanatory sectional explanatory drawing in alignment with CC line of FIG. The elements on larger scale which show the sound-absorbing material in FIG. 1, FIG. 4 by (A), (B).
  • FIG. 11 is a cross-sectional view taken along the line DD in FIG. 10.
  • FIG. 11 is a sectional view taken along line EE in FIG. 10.
  • Explanatory drawing which shows the assembly
  • Explanatory drawing which shows the example of an assembly from which a sound-absorbing material differs.
  • FIG. 12 is an explanatory cross-sectional view taken along line AA in FIG. 11. Explanatory drawing which shows the formation process of the twist part of a sound-absorbing material in (A) and (B).
  • the back door trim 10 of the first embodiment shown in FIG. 1 is disposed on the door body 1 that constitutes the substantially lower half of the back door illustrated in FIG.
  • a door frame is erected on both sides of the upper edge portion (door waist portion) of the door body 1 in the vehicle width direction.
  • the panel is fixed to constitute a substantially upper half of the back door (both door frame and window panel are not shown).
  • the door body 1 is formed by a door outer panel 2 and a door inner panel 3 in a closed cross section, and a back door trim 10 covers the entire surface of the door inner panel 3 and is fixed by, for example, clips at a plurality of positions on the peripheral edge thereof. It is fixed.
  • the back door trim 10 is molded by injection molding or the like with an appropriate synthetic resin material, and a sound absorbing material 11 is disposed on the back surface thereof.
  • a porous material such as felt, glass wool, an aggregate of resin fibers, or a foam having open cells such as polyurethane can be selectively used.
  • Such a porous material generally provides excellent sound absorption performance by using a material having an areal density of 100 g / m 2 to 1200 g / m 2 and a thickness of 5 mm to 30 mm. .
  • a low air permeability non-woven fabric having a surface density of 15 to 300 g / m 2 or a surface density of 30 to 100 g / m 2 is used on the surface of the porous material.
  • a multilayer structure having a surface protective material such as polyethylene film can be used.
  • felt is used as the above-described sound absorbing material 11, and as shown in FIG. 6A, linear slits 12A are formed in a staggered arrangement on the felt fabric, and the slits 12A have cut-out edges.
  • the surface of the sound absorbing material 11 is formed in an uneven shape.
  • the formation of the staggered arrangement of the straight slits 12A can be easily performed by press cutting with a blade die (not shown) provided with a large number of straight blades in a staggered arrangement.
  • the step ⁇ at the notch edge of the slit 12A described above causes the felt fabric to be pulled by the blade by the frictional force when the blade mold is stabbed into the felt fabric and pulled out from the felt fabric. Formed by.
  • the step ⁇ is not uniform in each slit 12A, and the step ⁇ is variously different to form an uneven shape on the surface of the sound absorbing material 11.
  • the slit 12A can be formed by a processing means such as an NC cutter or a water jet, in addition to the press-cut forming by the above-described blade type, and the processing method is not particularly limited.
  • the sound absorbing material 11 formed in this way is stretched on the back surface of the back door trim 10 and is fixed by ultrasonic welding, hot melt, double-sided adhesive tape, adhesive with adhesive, etc., clip or hook, etc. Attaching and fixing can be selectively used.
  • 1 and 2 indicates a fixed point by hooking, for example.
  • a step ⁇ is set at the notched edges of the slits 12A arranged in a staggered manner, and the surface of the sound absorbing material 11 is formed into an uneven shape. ) Protrudes, the surface area for absorbing the sound of the sound absorbing material 11 is increased, and a back air layer S serving as a sound absorbing layer is formed between the back surface of the back door trim 10 by this step ⁇ . Can do.
  • the sound absorbing performance can be enhanced without increasing the thickness and laying area of the sound absorbing material 11 or using an expensive sound absorbing material.
  • the sound absorbing material 11 in the first embodiment is expanded in a net shape to widen the slit 12A, and twisted to the net portion 11a between adjacent slits 12A.
  • the top end (end face) in the thickness direction of the slit 12A is positively exposed to the surface, and the step ⁇ is positively generated.
  • the set area before expansion of the sound absorbing material 11 is 100%, it can be expanded to 100% to 200%.
  • the amplification factor of the thickness due to the expansion of the net portion 11a between the slits 12A due to the expansion can be set to 100% to 200%.
  • the back air layer S it may be 300% or more.
  • the second embodiment expands and expands in a net shape as compared with the sound absorbing material 11 of the first embodiment, widens the slits 12A, and twists the net portion 11a between the slits 12A. Since ⁇ is increased, the surface area can be remarkably increased and the back air layer S serving as the sound absorbing layer can be increased.
  • the noise reflected by the back surface of the back door trim 10 through the widened slit 12 ⁇ / b> A can be absorbed also on the back surface side of the sound absorbing material 11.
  • FIGS. 7 and 8 both show the sound absorption of the back door trim 10 using the sound absorbing material 11 of the second embodiment and the back door trim 10 of the comparative example using the felt sound absorbing material 11A not subjected to slit processing. It shows performance.
  • FIG. 7A and 7B the sound absorbing material 11 of the second embodiment shown in FIG. 7A and the sound absorbing material 11A of the comparative example shown in FIG. (A)
  • the sound absorbing material 11 shown in FIG. 9A is expanded and expanded to 120% when the reference area is 100%.
  • FIG. 7C shows the sound absorbing power at a noise level of 250 Hz to 6300 Hz of the structure using the sound absorbing materials 11 and 11A shown in (A) and (B), and the sound absorption of the comparative example shown in the b line. It can be seen that the sound absorption of the present embodiment is improved as shown by line a compared to the force.
  • FIG. 8 shows that the sound absorbing material 11 of the second embodiment shown in FIG. (A) expands to 120% and expands to a predetermined set area, while the sound absorbing material 11A of the comparative example shown in FIG.
  • the setting area is the same as that of the sound absorbing material 11 in the figure.
  • FIG. 8C shows the sound absorption force at a noise level of 250 Hz to 6300 Hz of the structure using the sound absorbing materials 11 and 11A shown in (A) and (B), and the sound absorption of the comparative example shown in the b line. It can be seen that the sound absorption of the present embodiment is improved as shown by line a compared to the force.
  • the sound absorbing material 11 is the same material input amount as the comparative example 11A, the set area is expanded and expanded by expanding the slit 12A, thereby greatly increasing the sound absorbing power. It is understood that it can be improved.
  • the slit 12A is a straight slit, but in addition to this, the triangular wave line slit 12B shown in the modified example (A) of FIG. 9 and the waveform line shown in the modified example (B). It can be arbitrarily formed in the slit 12C, the cross-shaped slit 12D shown in the modification (C), or the like.
  • the overall length of the slit is increased compared to the straight slit 12A, and the cross-sectional area is increased by increasing the end of the slit in the thickness direction of each slit.
  • the area for absorbing sound can be increased.
  • the sound absorbing material 11 is expanded and developed as a whole, but the sound absorbing material 11 may be partially expanded and used.
  • the sound absorbing material 11 similar to that in the first embodiment is provided with slits 12E that divide and raise a region at a predetermined interval in the length direction (vehicle width direction). Cut and raised pieces 13 are respectively formed, and the surface of the sound absorbing material 11 is formed in an uneven shape by the plurality of cut and raised pieces 13 (see FIGS. 10 to 13).
  • the slit 12E includes a pair of horizontally long short sides along both widthwise edges of the sound-absorbing material 11 as shown in FIGS. 13 (A) and 16 (A), and vertically long long sides that connect one end thereof.
  • a plurality of the bowls are formed adjacent to each other with the direction of the bowl aligned in one direction.
  • the rising angle ⁇ of the cut and raised piece 13 is 0 ° to 90 °, preferably 30 ° to 90 °.
  • the cut-and-raised piece 13 protrudes toward the door body 1 and is provided in a vertically long shape. However, since the cut-and-raised piece 13 does not have a shape retaining property in an upright state, for example, a plurality of rib protrusions provided on the back door trim 10 shown in FIG. The back surface is supported by a support member such as 14 so that the standing state is maintained.
  • a pair of rib protrusions 14 are provided on the back surface of the back door trim 10 so as to support, for example, both sides in the longitudinal direction of one cut-and-raised piece 13, and the support edges thereof are at the standing angle ⁇ of the cut-and-raised piece 13. It is formed to be inclined at a corresponding required angle.
  • the support member is not limited to the rib protrusion 14, but may be any member that can be molded simultaneously with the mold forming of the back door trim 10, such as a columnar protrusion or an emboss.
  • the slit 12E can be easily formed by an unillustrated blade type provided with a plurality of cutting blades.
  • other processing means such as an NC cutter or a water jet can be used. It can employ
  • the sound absorbing material 11 formed in this manner is stretched on the back surface of the back door trim 10 as shown in FIG. 10, and is fixed by ultrasonic welding, hot melt, double-sided adhesion as in the first embodiment. Adhesion with a tape, an adhesive, etc., hooking and fixing with a clip or a hook, etc. can be selectively used.
  • the symbol P in FIG. 10 indicates this fixed point.
  • the cut-and-raised piece 13 can be held upright by using a retainer 15 made of a lightweight metal such as aluminum or a synthetic resin shown in FIG.
  • the retainer 15 includes a plurality of arm portions 16 that are formed in a rectangular frame shape capable of pressing the peripheral edge portion of the sound absorbing material 11 and support the free ends of the cut and raised pieces 13 from the back side.
  • the retainer 15 can be fixed to the back door trim 10 in a state in which the peripheral edge of the sound absorbing material 11 is pressed with a clip or the like not shown.
  • the arm portion 16 supports the cut-and-raised piece 13 by cutting and raising the arm portion 16 and engaging the retainer 15 with the sound-absorbing material 11 or by attaching the sound-absorbing material 11 to the back door trim 10 with the retainer 15. After fixing, it can be performed by raising and engaging the cut-and-raised piece 13 on the arm portion 16.
  • the surface of the sound absorbing material 11 is made uneven by the plurality of cut and raised pieces 13, whereby the surface area of the sound absorbing material 11 that absorbs the sound can be increased.
  • the cut-and-raised piece 13 can form a back air layer S serving as a sound absorbing layer between the back door trim 10 and the sound absorbing material 11.
  • a high sound absorbing performance can be obtained without increasing the thickness of the sound absorbing material 11, increasing the laying area, or using an expensive sound absorbing material, and the sound absorbing effect of the back door trim 10 can be enhanced.
  • the noise reflected on the back surface of the back door trim 10 after passing through the slit 12E widened by the formation of the cut and raised piece 13 can be absorbed on the back surface side of the sound absorbing material 11, the sound absorbing performance can be further enhanced. .
  • FIG. 15 shows the sound absorbing performance of the back door trim 10 using the sound absorbing material 11 of this embodiment and the back door trim 10 of a comparative example using the felt sound absorbing material 11A without cut and raised pieces.
  • FIG. 15C shows the sound absorbing power of the sound absorbing material 11A of the comparative example and the sound absorbing material 11 of this embodiment when the noise level is an average value of 315 Hz to 4000 Hz.
  • the sound absorbing material 11 has the same thickness and width as the sound absorbing material 11A of the comparative example, and is set to be 16% shorter than the sound absorbing material 11A.
  • the sound absorbing power when ⁇ is 0 °, 30 °, 45 °, 60 °, and 90 ° is shown.
  • the plurality of cut and raised pieces 13 of the sound absorbing material 11 provided in the back door trim 10 are formed in a strip shape to increase the surface area, but by making the strip shape vertically long, the cut and raised pieces 13 It is intended to maintain upright retention and to avoid dust accumulation.
  • the sound absorbing material 11 employs the long side of the saddle-shaped slit 12E shown in FIG. 16A as a straight line, but as shown in the modification (B) of FIG. 16, the slit 12E. If the long side of the slit 12E is a triangular wave line, or the long side of the slit 12E is a rectangular wave line as shown in the modification (C), the surface area for absorbing the sound at the end of the cut and raised piece 13 can be increased.
  • the cut and raised pieces 13 are cut and raised on one side surface of the sound absorbing material 11, but the cut and raised pieces 13 can be cut and raised on both side surfaces of the sound absorbing material 11.
  • the cut and raised piece 13 can be changed to a strip shape and a short piece (tongue piece) shape.
  • a side door trim 20 of an automobile is taken as an example of the trim material and will be described in detail with reference to the drawings.
  • a sound absorbing material 21 is disposed on the back surface thereof.
  • the sound absorbing material 21 uses the same porous material as in the first to third embodiments.
  • the sound absorbing material 21 is formed in a horizontally long strip shape with a required vertical width, and the side door trim 20 The upper and lower two steps are arranged close to the back surface (in FIG. 17, only the upper sound absorbing material 21 is shown for convenience).
  • Each of the sound absorbing materials 21 has slits 22 set in the length direction thereof, that is, the longitudinal direction of the vehicle, and twist portions 23 are formed on both sides of the slit 22 so as to form the slits. It has a concavo-convex shape continuous in the length direction.
  • the twisted portion 23 is formed with a slit 22 having an arbitrary length in the length direction at the center of the strip-shaped sound absorbing material 21, and one end portion is inverted.
  • the twisted portions 23 can be formed symmetrically on both sides of the slits 22 as shown in FIG.
  • locking portions 24 such as small holes or cross slits are formed (opened).
  • locking protrusions 25 are projected from portions corresponding to both ends in the length direction of the sound absorbing material 21.
  • the sound absorbing material 21 is stretched by its own elasticity, and the engaging portion 24 is inserted into and engaged with the engaging protrusion 25 and stretched between the engaging protrusions 25 and 25.
  • the slit 22 is set in the length direction of the sound absorbing material 21 formed in the strip shape, and the surface is continuous in the length direction by forming the twisted portions 23 on both sides thereof.
  • both the front and back surfaces can be used as a sound absorbing surface, and the surface area for absorbing sound is increased.
  • a back air layer S serving as a sound absorbing layer can be formed between the rear surface of the side door trim 20 due to the uneven shape of the surface.
  • the sound absorbing performance can be enhanced without increasing the thickness of the sound absorbing material 21, the laying area being increased, or the use of an expensive sound absorbing material, and the sound absorbing effect can be enhanced by the back air layer S. .
  • the back door trim and the side door trim are exemplified as the trim material, but a rear side trim and a roof trim may be used.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

L'invention concerne un matériau pour intérieur de véhicule, le matériau permettant de fournir des propriétés d'absorption acoustique sans augmentation de l'épaisseur du matériau d'absorption acoustique ou d'un matériau similaire. Des différences de niveau (δ) sont fournies aux extrémités crantées des fentes (12A) qui sont agencées en quinconce, ce qui donne à la surface du matériau d'absorption acoustique (11) une forme présentant des renfoncements et des saillies. La zone de surface d'absorption acoustique du matériau d'absorption acoustique (11) est ainsi augmentée et, du fait des différences de niveau (δ), une couche d'air arrière (S) qui agit comme une couche d'isolation acoustique se forme entre le matériau d'absorption acoustique (11) et un matériau de garniture (10). Les propriétés d'absorption acoustique du matériau d'absorption acoustique (11) sont ainsi améliorées et un effet d'absorption acoustique est obtenu grâce à la couche d'air arrière (S).
PCT/JP2013/007405 2012-12-19 2013-12-17 Matériau pour intérieur de véhicule WO2014097617A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2012276760A JP5961104B2 (ja) 2012-12-19 2012-12-19 車両用内装材
JP2012-276760 2012-12-19
JP2013-171235 2013-08-21
JP2013171235A JP2015039929A (ja) 2013-08-21 2013-08-21 車両用内装材
JP2013257049A JP6059650B2 (ja) 2013-12-12 2013-12-12 車両用内装材
JP2013-257049 2013-12-12

Publications (1)

Publication Number Publication Date
WO2014097617A1 true WO2014097617A1 (fr) 2014-06-26

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ID=50977979

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/007405 WO2014097617A1 (fr) 2012-12-19 2013-12-17 Matériau pour intérieur de véhicule

Country Status (1)

Country Link
WO (1) WO2014097617A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003048501A (ja) * 2001-08-07 2003-02-18 Toyoda Iron Works Co Ltd 車両用樹脂製内装部品、およびその設計方法
JP2003532127A (ja) * 1999-05-06 2003-10-28 ファイスト・オートモーティブ・ゲーエムベーハー・ウント・コンパニー・カーゲー 防音要素、防音要素の使用及び防音要素の製造方法
JP2008049721A (ja) * 2006-08-22 2008-03-06 Calsonic Kansei Corp 吸音材取付構造
JP2011042321A (ja) * 2009-08-24 2011-03-03 Kasai Kogyo Co Ltd 自動車用内装部品へのフェルト材固定構造
JP2011131707A (ja) * 2009-12-24 2011-07-07 Hayashi Engineering Inc 車両用衝撃吸収構造体
JP2011207380A (ja) * 2010-03-30 2011-10-20 Kasai Kogyo Co Ltd 自動車用内装部品並びにその製造方法
JP2012030714A (ja) * 2010-07-30 2012-02-16 Inoac Corp 車両内装部材

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003532127A (ja) * 1999-05-06 2003-10-28 ファイスト・オートモーティブ・ゲーエムベーハー・ウント・コンパニー・カーゲー 防音要素、防音要素の使用及び防音要素の製造方法
JP2003048501A (ja) * 2001-08-07 2003-02-18 Toyoda Iron Works Co Ltd 車両用樹脂製内装部品、およびその設計方法
JP2008049721A (ja) * 2006-08-22 2008-03-06 Calsonic Kansei Corp 吸音材取付構造
JP2011042321A (ja) * 2009-08-24 2011-03-03 Kasai Kogyo Co Ltd 自動車用内装部品へのフェルト材固定構造
JP2011131707A (ja) * 2009-12-24 2011-07-07 Hayashi Engineering Inc 車両用衝撃吸収構造体
JP2011207380A (ja) * 2010-03-30 2011-10-20 Kasai Kogyo Co Ltd 自動車用内装部品並びにその製造方法
JP2012030714A (ja) * 2010-07-30 2012-02-16 Inoac Corp 車両内装部材

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