WO2014097617A1 - Material for inside of vehicle - Google Patents

Material for inside of vehicle Download PDF

Info

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
Authority
WO
WIPO (PCT)
Prior art keywords
sound absorbing
absorbing material
slit
sound
cut
Prior art date
Application number
PCT/JP2013/007405
Other languages
French (fr)
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/en
Priority claimed from JP2013171235A external-priority patent/JP2015039929A/en
Priority claimed from JP2013257049A external-priority patent/JP6059650B2/en
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/en

Links

Images

Classifications

    • 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.

Abstract

Provided is a material for the inside of a vehicle, the material being able to provide increased sound absorption properties without an increase in the thickness of sound absorbing material or the like. Level differences (δ) are provided at the notched edges of slits (12A) arranged in a staggered manner, thus giving the surface of a sound absorbing material (11) a shape having recesses and protrusions. Thus, the sound-absorbing surface area of the sound absorbing material (11) is increased, and, as a result of the level differences (δ), a rear air layer (S) that acts as a sound-insulation layer is formed between the sound absorbing material (11) and a trim material (10). Thus, the sound absorption properties of the sound absorbing material (11) are improved and a sound absorbing effect is obtained due to the rear air layer (S).

Description

車両用内装材Interior materials for vehicles
　本発明は、自動車のドアトリムやルーフトリム等に代表される車両用内装材に関する。 The present invention relates to an interior material for a vehicle represented by a door trim or a roof trim of an automobile.
　自動車の車室側のパネル面を被覆して配設する車両用内装材の中には、例えば、特許文献１に示されているように、型成形された合成樹脂製のトリム材の裏面に吸音材を配設して、車外の騒音をその吸音材で吸収して車室内への透過音を小さく抑制するようにしたものが知られている。 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.
特開２００３－８１０２１号公報JP 2003-81021 A
　車両用内装材の吸音性能を高めるためには、吸音材の厚みや敷設面積を増大するか、吸音性能に優れた材料を選択する必要があって、コスト的に不利となってしまうことは否めない。 In order to improve the sound absorption performance of interior materials for vehicles, it is necessary to increase the thickness and laying area of the sound absorption material, or to select a material with excellent sound absorption performance, which is disadvantageous in terms of cost. Absent.
　そこで、本発明は吸音材の厚みの増大化や高価な吸音材料の使用を伴うことなく吸音性能を高めることができる車両用内装材を提供するものである。 Therefore, 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.
　本発明の車両用内装材は、トリム材の裏面に多孔質材料からなる吸音材を配設してあって、前記吸音材にスリットを設け、このスリットを凹凸付加源として前記吸音材の表面を凹凸形状に形成したことを主要な特徴としている。 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.
　本発明によれば、スリットを凹凸付加源として吸音材の表面を凹凸形状とすることによって、該吸音材の音を吸収する表面積が増大することに加えて、この凹凸形状によってトリム材と吸音材との間に吸音層となる背後空気層を形成することができる。 According to the present invention, 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.
　これにより、吸音材の厚みの増大化や高価な吸音材料の使用を伴うことなく吸音性能を高めることができる。 This makes it possible to improve the sound absorbing performance without increasing the thickness of the sound absorbing material or using an expensive sound absorbing material.
本発明の第１実施形態に係るバックドアトリムを裏面側から見た説明図。Explanatory drawing which looked at the back door trim which concerns on 1st Embodiment of this invention from the back surface side. 図１のＡ－Ａ線に沿う断面説明図。FIG. 2 is a cross-sectional explanatory view taken along line AA in FIG. 1. 図１のＢ－Ｂ線に沿う拡大断面説明図。FIG. 2 is an enlarged cross-sectional explanatory view taken along line BB in FIG. 1. 本発明の第２実施形態を示す図１と同様の説明図。Explanatory drawing similar to FIG. 1 which shows 2nd Embodiment of this invention. 図４のＣ－Ｃ線に沿う拡大断面説明図。Explanatory sectional explanatory drawing in alignment with CC line of FIG. 図１，図４における吸音材を（Ａ），（Ｂ）にて示す部分拡大図。The elements on larger scale which show the sound-absorbing material in FIG. 1, FIG. 4 by (A), (B). 第２実施形態の吸音材と、その比較例と、それらの吸音性能を（Ａ），（Ｂ），（Ｃ）にて示す説明図。Explanatory drawing which shows the sound-absorbing material of 2nd Embodiment, its comparative example, and those sound-absorbing performance in (A), (B), (C). 第２実施形態の吸音材と、その比較例と、それらの吸音性能を（Ａ），（Ｂ），（Ｃ）にて示す説明図。Explanatory drawing which shows the sound-absorbing material of 2nd Embodiment, its comparative example, and those sound-absorbing performance in (A), (B), (C). スリットの変形例を（Ａ），（Ｂ），（Ｃ）にて示す部分拡大図。The elements on larger scale which show the modification of a slit by (A), (B), (C). 本発明の第３実施形態に係るバックドアトリムを裏面側から見た説明図。Explanatory drawing which looked at the back door trim which concerns on 3rd Embodiment of this invention from the back surface side. 図１０のＤ－Ｄ線に沿う断面図。FIG. 11 is a cross-sectional view taken along the line DD in FIG. 10. 図１０のＥ－Ｅ線に沿う断面図。FIG. 11 is a sectional view taken along line EE in FIG. 10. 吸音材のバックドアトリムへの組付手順を（Ａ）、（Ｂ）にて示す説明図。Explanatory drawing which shows the assembly | attachment procedure to the back door trim of a sound-absorbing material in (A) and (B). 吸音材の異なる組付例を示す説明図。Explanatory drawing which shows the example of an assembly from which a sound-absorbing material differs. 第３実施形態の吸音材と、その比較例と、それらの吸音性能を（Ａ）、（Ｂ）、（Ｃ）にて示す説明図。Explanatory drawing which shows the sound-absorbing material of 3rd Embodiment, its comparative example, and those sound-absorbing performance in (A), (B), (C). スリットの形成例を（Ａ）、（Ｂ）、（Ｃ）にて示す説明図。Explanatory drawing which shows the example of formation of a slit by (A), (B), (C). 本発明の第４実施形態のドアトリムを裏面側から見た説明図。Explanatory drawing which looked at the door trim of 4th Embodiment of this invention from the back surface side. 図１１のＡ－Ａ線に沿う断面説明図。FIG. 12 is an explanatory cross-sectional view taken along line AA in FIG. 11. 吸音材のねじれ部の形成工程を（Ａ）、（Ｂ）にて示す説明図。Explanatory drawing which shows the formation process of the twist part of a sound-absorbing material in (A) and (B).
　以下、本発明の実施形態をトリム材として自動車のバックドアトリムを例に採って図面と共に詳述する。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings by taking an automobile back door trim as an example of a trim material.
　図１に示す第１実施形態のバックドアトリム１０は、図２に例示したバックドアの略下半部を構成するドア本体１に配設される。 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.
図２では便宜的にドア本体１のみを示しているが、このドア本体１の上縁部（ドアウエスト部）の車幅方向両側にドアフレームを立設してあって、該ドアフレームにウィンドウパネルを固着してバックドアの略上半部を構成している（ドアフレーム，ウィンドウパネルは何れも図示省略）。 Although only the door body 1 is shown in FIG. 2 for convenience, 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).
　このドア本体１は、ドアアウタパネル２とドアインナパネル３とで閉断面に形成してあって、バックドアトリム１０はドアインナパネル３の全面を覆ってその周縁部の複数ヶ所で例えばクリップにより止着固定している。 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.
　バックドアトリム１０は、適宜の合成樹脂材をもって射出成形等により型成形してあり、その裏面には吸音材１１を配設してある。 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.
　吸音材１１は、フェルト，グラスウール，樹脂繊維の集合体、あるいはポリウレタンのような連続気泡を持つ発泡体といった多孔質材料を選択的に用いることができる。 As the sound absorbing material 11, 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.
　このような多孔質材料は、一般に、面密度が１００ｇ／ｍ２～１２００ｇ／ｍ２、厚さが５ｍｍ～３０ｍｍのものを使用することで、優れた吸音性能が得られることが知られている。 It is known that 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. .
　また、吸音材１１として、上述の多孔質材料を単体として用いる他、多孔質材料の表面に、例えば、面密度１５～３００ｇ／ｍ２の低通気性不織布や、面密度３０～１００ｇ／ｍ２のポリエチレンフィルム、といった表面保護材を設けた多層構造のものを用いることができる。 In addition to using the above-mentioned porous material alone as the sound absorbing material 11, for example, 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.
　本実施形態では、上述の吸音材１１としてフェルトを用いており、図６（Ａ）にも示すようにこのフェルト生地に千鳥配列に直線のスリット１２Ａを形成して、該スリット１２Ａの切欠縁に図３に示すように段差δを設定することにより、吸音材１１の表面を凹凸形状に形成してある。 In the present embodiment, 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. By setting the step δ as shown in FIG. 3, the surface of the sound absorbing material 11 is formed in an uneven shape.
　直線のスリット１２Ａの千鳥配列の形成は、多数の直線刃を千鳥配列に設けた図外の刃型により容易に押切成形することができる。 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.
　そして、上述のスリット１２Ａの切欠縁の段差δは、この刃型をフェルト生地に突き刺した際、および、フェルト生地から抜き出した際に、摩擦力によりフェルト生地が刃に引き連れられて表面に飛び出すことによって形成される。 The step δ 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.
　従って、この段差δは各スリット１２Ａで一様ではなく、様々に段差δが異なって吸音材１１の表面の凹凸形状が形成される。 Therefore, the step δ is not uniform in each slit 12A, and the step δ is variously different to form an uneven shape on the surface of the sound absorbing material 11.
　このスリット１２Ａは、例えば、スリット全長ｌ＝１０～２００ｍｍ、スリット行間隔ａ＝５～５０ｍｍ、スリットとスリットの間隔ｂ＝５～５０ｍｍとして千鳥配列に形成している。 The slits 12A are formed in a staggered arrangement with, for example, a slit total length l = 10 to 200 mm, a slit row interval a = 5 to 50 mm, and a slit-to-slit interval b = 5 to 50 mm.
　また、このスリット１２Ａの形成は上述の刃型による押切成形の他、例えば、ＮＣカッターやウォータジェットなどの加工手段を採用することができ、その加工方法は特に限定されるものではない。 Further, 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.
　このようにして形成された吸音材１１は、バックドアトリム１０の裏面に張設するが、その固定は、超音波溶着、ホットメルト，両面接着テープ，粘着剤等による接着、クリップやフック等による掛着固定、等を選択的に用いることができる。図１，図２における符号Ｐは、例えば、フック掛着による固定点を示している。 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.
　以上の構成からなる本実施形態によれば、千鳥配列したスリット１２Ａの切欠縁に段差δを設定して、吸音材１１の表面を凹凸形状とすることにより、スリット１２Ａの厚み方向の木口（端面）が突出することによって、該吸音材１１の音を吸収する表面積が増大することに加えて、この段差δによってバックドアトリム１０の裏面との間に吸音層となる背後空気層Ｓを形成することができる。 According to the present embodiment having the above-described configuration, a step δ 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 δ. Can do.
　これにより、吸音材１１の厚みや敷設面積の増大化、あるいは高価な吸音素材の使用を伴うことなく吸音性能を高めることができる。 Thereby, 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.
　図４，図５は、本発明の第２実施形態を示している。 4 and 5 show a second embodiment of the present invention.
　本実施形態では、前述の第１実施形態における吸音材１１を、図６（Ｂ）にも示すように網状に展開してスリット１２Ａを拡開し、隣接するスリット１２Ａ間の網部１１ａに捩れを生じさせることにより、上述のスリット１２Ａの厚み方向の木口（端面）を積極的に表面に露出させると共に、前記段差δを積極的に生じさせている。 In the present embodiment, as shown in FIG. 6B, 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. As a result, the top end (end face) in the thickness direction of the slit 12A is positively exposed to the surface, and the step δ is positively generated.
　このスリット１２Ａの拡開は、前述の千鳥配列のスリット形成条件とした場合に、最大幅ｗ＝１～１００ｍｍとすることができる。 The widening of the slit 12A can be made to have a maximum width w = 1 to 100 mm under the above-described staggered slit forming conditions.
　また、吸音材１１の拡張前の設定面積を１００％とした場合に、１００％～２００％に拡張させることができる。 Also, when the set area before expansion of the sound absorbing material 11 is 100%, it can be expanded to 100% to 200%.
　また、吸音材１１の元々の設定厚みを１００％とした場合に、拡張によりスリット１２Ａ間の網部１１ａが捩れて反り上がることによる厚みの増幅率を１００％～２００％とすることができ、背後空気層Ｓを含めた場合には３００％以上となる場合もある。 Further, when the original set thickness of the sound absorbing material 11 is set to 100%, 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%. When the back air layer S is included, it may be 300% or more.
　この第２実施形態の構造によれば、第１実施形態の吸音材１１に較べて網状に展開拡張して、スリット１２Ａを拡開し、かつ、スリット１２Ａ間の網部１１ａを捩れさせて段差δを大きくしているので、表面積を格段に増大させると共に前記吸音層となる背後空気層Ｓを増大させることができる。 According to the structure of the second embodiment, it 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 δ is increased, the surface area can be remarkably increased and the back air layer S serving as the sound absorbing layer can be increased.
　しかも、図５に矢印で示すように、広げられたスリット１２Ａを通過してバックドアトリム１０の裏面で反射した騒音を吸音材１１の裏面側でも吸収させることができる。 Moreover, as indicated by an arrow in FIG. 5, 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.
　この結果、第１実施形態を凌駕する吸音効果を発揮させることができる。 As a result, the sound absorption effect that surpasses the first embodiment can be exhibited.
　図７，図８は、何れもこの第２実施形態の吸音材１１を用いたバックドアトリム１０と、スリット加工を施していないフェルト生地の吸音材１１Ａを用いた比較例のバックドアトリム１０との吸音性能を示すものである。 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.
　図７は、（Ａ）図に示す第２実施形態の吸音材１１と、（Ｂ）図に示す比較例の吸音材１１Ａを、同じ材料投入量（同一の厚み寸法，同一の基準面積）として、（Ａ）図に示す吸音材１１は基準面積を１００％とした場合に、１２０％に拡張して展開したものである。図７（Ｃ）は、これら（Ａ），（Ｂ）に示した吸音材１１，１１Ａを用いた構造の２５０Ｈｚ～６３００Ｈｚの騒音レベルにおける吸音力を示しており、ｂ線に示す比較例の吸音力に較べて、ａ線に示すように本実施形態の吸音力が向上しているのが判る。 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.
　図８は、（Ａ）図に示す第２実施形態の吸音材１１は１２０％に拡張して所定の設定面積に展開する一方、（Ｂ）図に示す比較例の吸音材１１Ａを（Ａ）図の吸音材１１と同一の設定面積としたものである。図８（Ｃ）は、これら（Ａ），（Ｂ）に示した吸音材１１，１１Ａを用いた構造の２５０Ｈｚ～６３００Ｈｚの騒音レベルにおける吸音力を示しており、ｂ線に示す比較例の吸音力に較べて、ａ線に示すように本実施形態の吸音力が向上しているのが判る。 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.
　これらのことから、第２実施形態の構造によれば、吸音材１１が比較例１１Ａと同じ材料投入量であれば、設定面積をスリット１２Ａを拡開して拡張展開することで吸音力を大幅に向上できることが理解される。 From these facts, according to the structure of the second embodiment, if 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.
　また、設定面積が同じ場合には、比較例よりも少ない材料投入量で、同じ吸音力を確保できることが理解される。 Also, when the set area is the same, it is understood that the same sound absorbing force can be secured with a smaller amount of material input than in the comparative example.
　前記各実施形態では、何れもスリット１２Ａは直線のものを採用しているが、この他、図９の変形例（Ａ）に示す三角波線のスリット１２Ｂ、変形例（Ｂ）に示す波形線のスリット１２Ｃ、変形例（Ｃ）に示す十字線のスリット１２Ｄ等に任意に形成することができる。 In each of the above embodiments, 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.
　これら変形例に示すスリット１２Ｂ～１２Ｄとした場合、直線のスリット１２Ａに較べてスリット全長が増大し、各スリットの厚み方向の木口（端面）も増加することとなって断面積が増大して、音を吸収する面積を増大させることができる。 In the case of the slits 12B to 12D shown in these modified examples, 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.
　なお、前記実施形態では吸音材１１を全体的に拡張展開しているが、吸音材１１を部分的に拡張展開して用いるようにしてもよい。 In the above-described embodiment, the sound absorbing material 11 is expanded and developed as a whole, but the sound absorbing material 11 may be partially expanded and used.
　図１０～図１６は、本発明の第３実施形態を示している。 10 to 16 show a third embodiment of the present invention.
　本実施形態では、前記第１実施形態と同様の吸音材１１に、その長さ方向（車幅方向）に所要の間隔をおいて切り起こし領域を区画するスリット１２Ｅを設けて、各スリット１２Ｅからそれぞれ切り起こし片１３を形成して、これら複数の切り起こし片１３により吸音材１１の表面を凹凸形状に形成してある（図１０～図１３参照）。 In the present embodiment, 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).
　本実施形態ではスリット１２Ｅを、図１３（Ａ）、図１６（Ａ）に示すように吸音材１１の幅方向両側縁に沿う一対の横長の短辺とそれらの一端を繋ぐ縦長の長辺とで鉤形に形成して、この鉤形の向きを一方向に揃えて複数を隣接して形成してある。 In this embodiment, 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. In the shape of a bowl, a plurality of the bowls are formed adjacent to each other with the direction of the bowl aligned in one direction.
　切り起こし片１３の切り起こしに有効なスリット１２Ｅの丈（形成幅）Ｌは、吸音材１１の厚みｔに対して０．５倍～５．０倍（例えば、吸音材厚みｔ＝１０ｍｍの場合、スリット丈Ｌ＝５ｍｍ～５０ｍｍ）が好ましい。また、切り起こし片１３の起立角度θは、０°～９０°好ましくは３０°～９０°としている。 The length (formation width) L of the slit 12E effective to cut and raise the cut and raised piece 13 is 0.5 to 5.0 times the thickness t of the sound absorbing material 11 (for example, when the sound absorbing material thickness t = 10 mm). Slit length L = 5 mm to 50 mm) is preferable. The rising angle θ of the cut and raised piece 13 is 0 ° to 90 °, preferably 30 ° to 90 °.
　切り起こし片１３は、ドア本体１側に向けて突出して縦長に設けられるが、自体には起立状態の形状保持性がないため、例えば、図１３に示すバックドアトリム１０に設けた複数のリブ突起１４等の支持部材で背面を支えて起立状態を保持するようにしている。 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.
　リブ突起１４はバックドアトリム１０の裏面に、例えば、１つの切り起こし片１３に対してその長さ方向両側を支えるように各一対設けてあり、その支持縁は切り起こし片１３の起立角度θに対応する所要の角度に傾斜して形成してある。 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 θ of the cut-and-raised piece 13. It is formed to be inclined at a corresponding required angle.
　支持部材はリブ突起１４に限らず、柱状突起やエンボスなどバックドアトリム１０の型成形と同時に成形可能なものであればよい。 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.
　スリット１２Ｅの形成は前記第１実施形態で述べたように複数の切刃を設けた図外の刃型により容易に形成することができるが、この他、ＮＣカッターやウォータジェットなどの加工手段を採用することができ、その加工方法は特に限定されるものではない。 As described in the first embodiment, the slit 12E can be easily formed by an unillustrated blade type provided with a plurality of cutting blades. In addition, other processing means such as an NC cutter or a water jet can be used. It can employ | adopt and the processing method is not specifically limited.
　このようにして形成された吸音材１１は、図１０に示すようにバックドアトリム１０の裏面に張設されるが、その固定は前記第１実施形態と同様に超音波溶着，ホットメルト，両面接着テープ，粘着剤等による接着，クリップやフック等による掛着固定、等を選択的に用いることができる。図１０の符号Ｐはこの固定点を示している。 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.
　この吸音材１１のバックドアトリム１０への組付けに際して、図１３（Ａ）に示すように吸音材１１をバックドアトリム１０の裏面に重合すれば、リブ突起１４により切り起こし片１３が背面側から突き上げられて起立保持されるから、この状態で吸音材１１をバックドアトリム１０の裏面に固定する。 When the sound absorbing material 11 is assembled to the back door trim 10, as shown in FIG. 13A, if the sound absorbing material 11 is superposed on the back surface of the back door trim 10, the rib projection 14 cuts and raises the piece 13 from the back side. The sound absorbing material 11 is fixed to the back surface of the back door trim 10 in this state.
　切り起こし片１３の起立保持は、この他、例えば図１４に示すアルミ等の軽量金属製あるいは合成樹脂製のリテーナ１５を用いることによって行うこともできる。 In addition to this, 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.
　リテーナ１５は、吸音材１１の周縁部を押え可能な矩形のフレーム状に形成して、各切り起こし片１３の自由端を背面側から支える複数のアーム部１６を備える。 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.
　リテーナ１５は、例えば図外のクリップ等により吸音材１１の周縁部を押え付けた状態でバックドアトリム１０に固定することができる。 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.
　アーム部１６による切り起こし片１３の支持は、アーム部１６を切り起こし片１３に係着してリテーナ１５を吸音材１１に仮止めするか、あるいはリテーナ１５による吸音材１１のバックドアトリム１０への固定後に切り起こし片１３をアーム部１６上に引き起こして係着することによって行うことができる。 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.
　以上の構成からなる本実施形態によれば、複数の切り起こし片１３により吸音材１１の表面を凹凸形状とすることによって、該吸音材１１の音を吸収する表面積を増大することができる。これに加えて図１２に示すように、この切り起こし片１３によってバックドアトリム１０と吸音材１１との間に吸音層となる背後空気層Ｓを形成することができる。 According to the present embodiment configured as described above, 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. In addition to this, as shown in FIG. 12, 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.
　この結果、吸音材１１の厚みを増したり、敷設面積を増大したり、あるいは高価な吸音素材を使用しなくても高い吸音性能が得られ、バックドアトリム１０の吸音効果を高めることができる。また、切り起こし片１３の形成により広がったスリット１２Ｅを通過してバックドアトリム１０の裏面で反射した騒音を吸音材１１の裏面側で吸収させることができるので、吸音性能をより一層高めることができる。 As a result, 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. Moreover, since 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. .
　これにより、従来の吸音材を凌駕する吸音効果を発揮させることができる。 This makes it possible to exert a sound absorbing effect that surpasses conventional sound absorbing materials.
　図１５は、この実施形態の吸音材１１を用いたバックドアトリム１０と、切り起こし片の無いフェルト生地の吸音材１１Ａを用いた比較例のバックドアトリム１０との吸音性能を示すものである。 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.
　図１５（Ｃ）は、騒音レベルが３１５Ｈｚ～４０００Ｈｚ平均値での比較例の吸音材１１Ａと、本実施形態の吸音材１１の吸音力を示している。図１５の実施例では吸音材１１は比較例の吸音材１１Ａと同一厚み，同一幅で、かつ該吸音材１１Ａよりも１６％長さを短く設定してあって、切り起こし片１３の起立角度θを０°、３０°、４５°、６０°、９０°とした場合の吸音力を示している。この図から、本実施形態の切り起こし片１３の起立角度をθ＝０°とした場合には比較例の吸音材１１Ａよりも長さが短いため比較例よりも吸音力が低いが、該起立角度をθ＝３０°に設定すると比較例の吸音力とほぼ同程度に近づく。そして、起立角度θ＝４５°～９０°では比較例よりも吸音力が向上していることが判る。 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. In the embodiment of FIG. 15, 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 θ is 0 °, 30 °, 45 °, 60 °, and 90 ° is shown. From this figure, when the rising angle of the cut and raised piece 13 of the present embodiment is θ = 0 °, the length is shorter than the sound absorbing material 11A of the comparative example and thus the sound absorbing power is lower than that of the comparative example. When the angle is set to θ = 30 °, the sound absorption force of the comparative example approaches approximately the same level. It can be seen that the sound absorption is improved over the comparative example at the standing angle θ = 45 ° to 90 °.
　本実施形態ではバックドアトリム１０に設けられる吸音材１１の複数の切り起こし片１３を短冊形状に形成して表面積を増大させているが、この短冊形状を縦長とすることにより、切り起こし片１３の起立保持性の維持および塵埃の付着堆積回避を図っている。 In the present embodiment, 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.
　前記実施形態では、吸音材１１は図１６（Ａ）に示す鉤形のスリット１２Ｅの長辺を直線としたものを採用しているが、図１６の変形例（Ｂ）に示すようにスリット１２Ｅの長辺を三角波線としたり、変形例（Ｃ）に示すようにスリット１２Ｅの長辺を矩形波線とすれば、切り起こし片１３の端部の音を吸収する表面積を増大できる。 In the above-described embodiment, 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.
　なお、前記実施形態では吸音材１１の一側面に切り起こし片１３を切り起こし配置しているが、吸音材１１の両側面に切り起こし片１３を切り起こし配置することも可能である。また、切り起こし片１３は短冊形状に変えて、短片（舌片）形状にすることも可能である。 In the embodiment, 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. In addition, the cut and raised piece 13 can be changed to a strip shape and a short piece (tongue piece) shape.
　図１７～図１９は、本発明の第４実施形態を示している。 17 to 19 show a fourth embodiment of the present invention.
　本実施形態では、トリム材として自動車のサイドドアトリム２０を例に採って図面と共に詳述する。 In the present embodiment, 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.
　図１７に示す本実施形態のサイドドアトリム２０は、適宜の合成樹脂材をもって射出成形などにより型成形してあり、その裏面には吸音材２１を配設してある。 17 is molded by injection molding or the like with an appropriate synthetic resin material, and a sound absorbing material 21 is disposed on the back surface thereof.
　吸音材２１は、前記第１～第３実施形態と同様の多孔質材料を用いており、本実施形態では吸音材２１を所要の上下幅で横長の短冊形状に形成して、サイドドアトリム２０の裏面に上，下2段に近接して配置してある（図１７では、便宜的に上段の吸音材２１のみを示している）。 The sound absorbing material 21 uses the same porous material as in the first to third embodiments. In this embodiment, 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).
　吸音材２１は、何れもその長さ方向、つまり、車両前後方向にスリット２２を設定し、該スリット２２の両側にその形成長さにねじれ部２３を形成して、該ねじれ部２３により表面を長さ方向に連続した凹凸形状としている。 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.
　上述のねじれ部２３は、図１９（Ａ）に示すように短冊形状の吸音材２１の中央に長さ方向に任意の長さでスリット２２を形成し、そして、一方の端部を反転してこのスリット２２に中通しする（くぐらせる）ことによって、図１９（Ｂ）に示すようにスリット２２の両側にねじれ部２３を対称的に形成することができる。 As shown in FIG. 19A, 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. By passing (passing through) the slits 22, the twisted portions 23 can be formed symmetrically on both sides of the slits 22 as shown in FIG.
　吸音材２１の長さ方向両端部には、小孔または十字スリット等の係止部２４を穿設（開設）してある。一方、サイドドアトリム２０の裏面には吸音材２１の長さ方向両端部に対応する部分に係止突起２５を突設してある。そして、吸音材２１を自体の弾性により伸張して係止部２４を係止突起２５に挿通係着して、これら係止突起２５，２５間に跨って張設してある。係止突起２５に抜け止め用の返しを設けることにより、吸音材２１の脱落防止を確実なものとすることができる。 At both ends in the length direction of the sound absorbing material 21, locking portions 24 such as small holes or cross slits are formed (opened). On the other hand, on the back surface of the side door trim 20, 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. By providing the retaining protrusion 25 with a retaining bar, the sound absorbing material 21 can be reliably prevented from falling off.
　以上の構成からなる本実施形態によれば、短冊形状に形成した吸音材２１の長さ方向にスリット２２を設定し、その両側にねじれ部２３を形成して表面を長さ方向に連続した凹凸形状とすることにより、表裏両面を音の吸収面に利用できて音を吸収する表面積が増大する。また、これに加えて、表面の凹凸形状によりサイドドアトリム２０の裏面との間に吸音層となる背後空気層Ｓを形成することができる。 According to the present embodiment configured as described above, 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. By adopting the shape, both the front and back surfaces can be used as a sound absorbing surface, and the surface area for absorbing sound is increased. In addition to this, 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.
　これにより、吸音材２１の厚みを増したり、敷設面積を増大したり、あるいは高価な吸音素材を使用しなくても吸音性能を高められると共に、前記背後空気層Ｓにより吸音効果を高めることができる。 Accordingly, 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. .
　なお、前記各実施形態ではトリム材としてバックドアトリム、サイドドアトリムを例示したが、リアサイドトリムやルーフトリムであってもよい。 In each of the above embodiments, 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.
１…ドア本体
２…ドアアウタパネル
３…ドアインナパネル
１０…バックドアトリム（トリム材）
１１…吸音材
１１ａ…網部
１３…切り起こし片
１２Ａ～１２Ｅ…スリット
２０…サイドドアトリム（トリム材）
２１…吸音材
２２…スリット
２３…ねじれ部
δ…段差
Ｓ…背後空気層 DESCRIPTION OF SYMBOLS 1 ... Door main body 2 ... Door outer panel 3 ... Door inner panel 10 ... Back door trim (trim material)
11 ... Sound absorbing material 11a ... Net 13 ... Cut and raised pieces 12A to 12E ... Slit 20 ... Side door trim (trim material)
21 ... Sound absorbing material 22 ... Slit 23 ... Twist part δ ... Step S ... Back air layer

Claims (7)

  1. 　トリム材の裏面に多孔質材料からなる吸音材を配設した構造であって、
    　前記吸音材にスリットを設け、該スリットを凹凸付加源として前記吸音材の表面を凹凸形状に形成したことを特徴とする車両用内装材。     A structure in which a sound absorbing material made of a porous material is disposed on the back surface of the trim material,
    An interior material for a vehicle, wherein a slit is provided in the sound absorbing material, and the surface of the sound absorbing material is formed in a concavo-convex shape using the slit as a concavo-convex additional source.
  2. 　前記スリットを千鳥配列に複数形成して、該スリットの切欠縁に段差を設定することにより前記吸音材の表面を凹凸形状に形成したことを特徴とする請求項１に記載の車両用内装材。 The vehicle interior material according to claim 1, wherein a plurality of the slits are formed in a staggered arrangement, and the surface of the sound absorbing material is formed in a concavo-convex shape by setting a step at a notch edge of the slit.
  3. 　前記吸音材を網状に展開して前記スリットを拡開し、隣接するスリット間の網部に捩れを生じさせることにより、前記段差を設定したことを特徴とする請求項２に記載の車両用内装材。 3. The vehicle interior according to claim 2, wherein the step is set by spreading the sound absorbing material in a net shape to widen the slit and causing a twist in a net portion between adjacent slits. Wood.
  4. 　前記スリットは所要の切り起こし領域を区画して設け、該スリットから切り起こし片を形成して、該切り起こし片により前記吸音材の表面を凹凸形状に形成したことを特徴とする請求項１に記載の車両用内装材。 2. The slit according to claim 1, wherein the slit is provided by partitioning a required cut-and-raised region, a cut-and-raised piece is formed from the slit, and the surface of the sound-absorbing material is formed in an uneven shape by the cut-and-raised piece. The vehicle interior material described.
  5. 　前記トリム材が車体パネル面に並列に配設される室内トリムであって、前記切り起こし片を短冊形状に形成したことを特徴とする請求項４に記載の車両用内装材。 The vehicle interior material according to claim 4, wherein the trim material is an indoor trim disposed in parallel with a vehicle body panel surface, and the cut and raised pieces are formed in a strip shape.
  6. 　前記吸音材を短冊形状に形成してその中央に長さ方向にスリットを設定し、該スリットの両側にその形成長さにねじれ部を形成して、該ねじれ部により前記吸音材の表面を長さ方向に連続した凹凸形状に形成したことを特徴とする請求項１に記載の車両用内装材。 The sound-absorbing material is formed in a strip shape, a slit is set in the length direction at the center, and a twisted portion is formed on both sides of the slit, and the surface of the sound-absorbing material is elongated by the twisted portion. The vehicle interior material according to claim 1, wherein the vehicle interior material is formed in a concavo-convex shape continuous in a vertical direction.
  7. 　前記吸音材の長さ方向両端部に係止部を開設し、該吸音材を伸張して前記係止部を前記トリム材に所要の間隔をおいて突設した係止突起に挿通係着して、これら係止突起間に跨って張設したことを特徴とする請求項６に記載の車両用内装材。 Locking portions are opened at both ends in the length direction of the sound absorbing material, the sound absorbing material is extended, and the locking portions are inserted and engaged with locking protrusions protruding from the trim material at a predetermined interval. The vehicle interior material according to claim 6, wherein the vehicle interior material is stretched between the locking projections.
PCT/JP2013/007405 2012-12-19 2013-12-17 Material for inside of vehicle WO2014097617A1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2012276760A JP5961104B2 (en) 2012-12-19 2012-12-19 Interior materials for vehicles
JP2012-276760 2012-12-19
JP2013-171235 2013-08-21
JP2013171235A JP2015039929A (en) 2013-08-21 2013-08-21 Interior material for vehicle
JP2013257049A JP6059650B2 (en) 2013-12-12 2013-12-12 Interior materials for vehicles
JP2013-257049 2013-12-12

Publications (1)

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

Family

ID=50977979

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/007405 WO2014097617A1 (en) 2012-12-19 2013-12-17 Material for inside of vehicle

Country Status (1)

Country Link
WO (1) WO2014097617A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003048501A (en) * 2001-08-07 2003-02-18 Toyoda Iron Works Co Ltd Resin-made interior part for vehicle and design method therefor
JP2003532127A (en) * 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 Soundproof element, use of the soundproof element and method of manufacturing the soundproof element
JP2008049721A (en) * 2006-08-22 2008-03-06 Calsonic Kansei Corp Sound absorbing material mounting structure
JP2011042321A (en) * 2009-08-24 2011-03-03 Kasai Kogyo Co Ltd Structure for fixing felt material to interior component for automobile
JP2011131707A (en) * 2009-12-24 2011-07-07 Hayashi Engineering Inc Shock absorbing structure for vehicle
JP2011207380A (en) * 2010-03-30 2011-10-20 Kasai Kogyo Co Ltd Automobile interior trim, and method for manufacturing the same
JP2012030714A (en) * 2010-07-30 2012-02-16 Inoac Corp Vehicle interior member

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003532127A (en) * 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 Soundproof element, use of the soundproof element and method of manufacturing the soundproof element
JP2003048501A (en) * 2001-08-07 2003-02-18 Toyoda Iron Works Co Ltd Resin-made interior part for vehicle and design method therefor
JP2008049721A (en) * 2006-08-22 2008-03-06 Calsonic Kansei Corp Sound absorbing material mounting structure
JP2011042321A (en) * 2009-08-24 2011-03-03 Kasai Kogyo Co Ltd Structure for fixing felt material to interior component for automobile
JP2011131707A (en) * 2009-12-24 2011-07-07 Hayashi Engineering Inc Shock absorbing structure for vehicle
JP2011207380A (en) * 2010-03-30 2011-10-20 Kasai Kogyo Co Ltd Automobile interior trim, and method for manufacturing the same
JP2012030714A (en) * 2010-07-30 2012-02-16 Inoac Corp Vehicle interior member

Similar Documents

Publication Publication Date Title
US20050133302A1 (en) Sound shielding element, use thereof and method of producing the same
JP5701665B2 (en) Dash silencer mounting structure
US20110076435A1 (en) Shield plate and Vehicle Structure Provided With The Shield Plate
KR200465648Y1 (en) Air filter
JP6353690B2 (en) Interior materials for vehicles
US8887850B2 (en) Cover device
JP6059650B2 (en) Interior materials for vehicles
WO2014097617A1 (en) Material for inside of vehicle
JP6199178B2 (en) Interior materials for vehicles
JP5961104B2 (en) Interior materials for vehicles
JP2015039929A (en) Interior material for vehicle
JP7372821B2 (en) Duct member and its manufacturing method, duct
JP5888744B2 (en) Interior materials for vehicles
CN203283143U (en) Interior part for vehicle
KR101548615B1 (en) Soundproof door using elasticity
KR20020003857A (en) Sound-shielding element, use thereof and method for producing the same
JP5104210B2 (en) Interior materials for vehicles
JP6012939B2 (en) Door manufacturing method
JP6501324B2 (en) Sound absorbing material and laminate for vehicles
KR20140012797A (en) Dual material insulation pad for hood panel
KR102260853B1 (en) cutting and suturing molds for non woven fabrics
JP2005022477A (en) Door structure for automobile
JP2006144368A (en) Panel with stuck sheet
WO2021206085A1 (en) Heat shielding and noise reducing material for vehicle
JP2009281341A (en) Sound absorbing material attaching method, and member attached with sound absorbing material

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13864217

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13864217

Country of ref document: EP

Kind code of ref document: A1