JP2007038844A - Interior member for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interior member for a vehicle, capable of reducing uncomfortableness due to radiation heat by restricting accumulation of heat by solar beams. <P>SOLUTION: In this device, infrared ray reflection layers 20 and 24 are provided on at least an upper surface part where solar beams are most strongly applied. Infrared rays S in the solar beams are thus partly reflected, and not absorbed into an instrument panel 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle interior material.

When the vehicle is parked under the hot sun, the instrument panel (particularly the upper surface portion), which is the vehicle interior material, is heated by the infrared rays contained in the sunlight that enters from the front window panel. The instrument panel has a structure in which a foam material is sandwiched between a skin material and a core material, and the instrument panel absorbs solar heat to increase the temperature and store heat and warm the vehicle interior air. For this reason, when the occupant gets on the vehicle, the air conditioning unit is operated to lower the temperature of the passenger compartment air (see, for example, Patent Document 1).
JP 2001-180330 A

  However, in such a conventional technique, even if the temperature of the passenger compartment air is lowered by operating the air conditioning unit, the temperature of the instrument panel itself decreases slowly due to the accumulated heat. The radiant heat is emitted toward the occupant from the, causing discomfort to the occupant.

  The present invention has been made by paying attention to such a conventional technique, and provides an interior material for a vehicle that can suppress heat storage by sunlight and can reduce discomfort caused by radiant heat.

  The invention according to claim 1 is characterized in that an infrared reflection layer is provided at least in a portion corresponding to the upper surface portion.

  The invention according to claim 2 is characterized in that the infrared reflective layer contains a granular material having a retroreflective effect.

  The invention according to claim 3 is a structure comprising at least a skin material, a foam material, and a core material, the surface of the skin material is formed by a design layer colored with an infrared transmitting pigment, and an infrared reflection layer is formed thereunder It is characterized by being.

  The invention described in claim 4 is characterized in that the foam material is an open cell type having air permeability and includes an air permeable foam layer formed over the top and bottom.

  The invention according to claim 5 is a structure composed of at least a skin material, a foam material, and a core material, and the foam material includes a breathable foam layer formed in a continuous cell type having breathability and vertically. Air ducts along the vehicle width direction are joined to the lower part and the upper part of the core material, respectively, and a cut portion is formed in the core material corresponding to each air duct to expose the breathable foam layer, and the lower air duct serves as a lower passage The upper air duct communicates with the space outside the vehicle through the upper passage.

  According to the first aspect of the present invention, since the infrared reflection layer is provided at least on the upper surface portion where the sunlight rays are most exposed, a part of the infrared rays of the sunlight rays is reflected and is not absorbed by the vehicle interior material. Therefore, the temperature rise and heat storage of the vehicle interior material are suppressed, the radiant heat from the surface of the vehicle interior material is reduced, and the discomfort to the passenger is alleviated.

  According to invention of Claim 2, since the infrared reflective layer contains the granular material with a retroreflection effect, the reflection of the infrared rays on the surface of a granular material and the retroreflection effect on the inner surface of a granular material are effective. It can be expected, and it is possible to further suppress the temperature rise and heat storage of the vehicle interior material.

  According to the invention described in claim 3, since the surface of the skin material is formed by the design layer colored with the infrared transmitting pigment, the infrared rays are transmitted through the design layer and are not easily generated. And the infrared rays which permeate | transmitted the design layer are reliably reflected by an infrared reflective layer, and the heat storage in a foam material or a core material is prevented.

  According to the invention of claim 4, since the foam material includes an open-cell type breathable foam layer having air permeability, the air of the foam material is caused to flow by natural ventilation or forced ventilation, Heat storage can be prevented. It is also possible to forcibly cool the air from the air conditioning unit.

  According to the fifth aspect of the present invention, air having a relatively low temperature below the passenger compartment is introduced into the breathable foam layer through the lower passage and the lower air duct, and is heated and raised in the breathable foam layer. The discharged air is discharged out of the vehicle through the upper air duct and the upper passage. In this way, air with relatively low temperature is introduced into the foam material, and the air warmed in the foam material is discharged outside the vehicle, so that heat storage in the foam material is efficient even though it is naturally ventilated. And it can prevent reliably.

  The purpose of the present invention is to provide an interior material for a vehicle that can relieve discomfort due to radiant heat by suppressing heat storage by sunlight, and by providing an infrared reflective layer at least in a portion corresponding to the upper surface portion. It was realized. Embodiments of the present invention will be described below with reference to the drawings.

  1 to 4 are diagrams showing an embodiment of the present invention. An instrument panel 1 as an interior material of an automobile is installed in front of the passenger compartment. A front window panel 2 is formed above the instrument panel 1, a dash panel 3 is formed at the front, and a floor panel 4 is formed below. From the dash panel 3, air can be taken into the air conditioning unit 6 through the intake duct 5.

  A front differential 7 is formed in front of the upper surface portion 1a of the instrument panel 1, and side differentials 8 are formed on both the left and right sides. A center bench 9 is formed in the center of the instrument panel 1, and side benches 10 are provided on the left and right sides. From the front differential 7, the side differential 8, the center bench 9, and the side bench 10, the conditioned air processed by the air conditioning unit 6 can be blown out.

  A center console 11 connected to the floor panel 4 is formed at the center of the instrument panel 1, an instrument panel 12 is formed on the driver side, and a glove box 13 is formed on the passenger seat side. Inside the instrument panel 1 in front of the glove box 13, an airbag 14 is provided in a state of being fixed to the steering member 15.

  The instrument panel 1 has a basic structure in which a foam material 18 is formed between a skin material 16 and a core material 17 (see FIG. 3). The skin material 16 is further formed of a design layer 19, a first infrared reflecting layer 20, and a reinforcing layer 21 (see FIG. 4). The design layer 19 is formed of a resin colored with an infrared transmitting pigment. The 1st infrared reflective layer 20 contains many ceramic balloons 22 as "a granular material with a retroreflection effect" in resin. The ceramic balloon 22 has a true spherical hollow structure, and can reflect the infrared rays S of sunlight rays on the surface, and has an effect of retroreflecting on the inner surface. Instead of the ceramic balloon 22, a granular material having a retroreflective effect such as a glass sphere may be used. The reinforcing layer 21 is provided for the lack of strength of the skin material 16 and improvement of formability.

  The foam material 18 includes a breathable foam layer 23, a second infrared reflective layer 24, and a non-breathable foam layer 25. The air-permeable foam layer 23 is an air-permeable open cell type in which a partition (cell wall) between the bubbles is removed by enlarging the size of the bubbles (cells), and the air inside flows. Easy and low heat storage capacity per volume. For the breathable foam layer 23, in addition to breathable urethane, a three-dimensionally knitted fiber or a solidified resin extruded in a filament shape may be used. The second infrared reflective layer 24 is formed of an adhesive containing an infrared reflective pigment. The 2nd infrared reflective layer 24 may be formed with the coating film and metal vapor deposition film containing an infrared reflective pigment, and may join with a normal adhesive agent. The non-breathable foam layer 25 is formed of closed-cell foamed urethane and has a sound insulation effect. The core material 17 is made of a pre-molded high-strength resin and bears the strength of the entire instrument panel 1.

  Air ducts 26 and 27 are joined to the lower and upper portions of the instrument panel 1 from the back side. Cut portions 28 and 29 are formed in the core material 17 and the non-breathable foam layer 25 corresponding to the air ducts 26 and 27, and the breathable foam layer 23 is exposed. The lower air duct 26 communicates with the space below the vehicle interior space (near the floor panel 4) via the lower passage 30. The upper air duct 27 communicates with the space outside the vehicle (in the vicinity of the intake duct 5) via the upper passage 31.

  According to this embodiment, since the design layer 19 of the skin material 16 is first colored with an infrared transmitting pigment, the design layer 19 transmits infrared S and does not generate much heat. Then, the infrared S transmitted through the design layer 19 is reflected by the first infrared reflective layer 20 directly below the design layer 19, and the infrared S transmitted through the foam material 18 and the core material 17 is reduced. In particular, since the first infrared reflective layer 20 contains a ceramic balloon 22 having a retroreflective effect, reflection of infrared S on the surface of the ceramic balloon 22 and a retroreflective effect on the inner surface can be expected. The temperature rise and heat storage of the panel 1 can be suppressed.

  Further, since the foam material 18 includes the open cell breathable foam layer 23 having air permeability in the vertical direction, the air in the foam material 18 can flow from the bottom to the top by natural ventilation. The heat storage in 18 can be prevented. That is, since the air heated in the breathable foam layer 23 of the instrument panel 1 flows upward in the breathable foam layer 23, the breathable foam layer 23 is connected to the breathable foam layer 23 via the lower passage 30 and the lower air duct 26. Air of relatively low temperature in the lower part of the passenger compartment flows in, and warm air in the breathable foam layer 23 is discharged outside the vehicle through the upper air duct 27 and the upper passage 31. In this way, since air having a relatively low temperature is introduced into the foam material 18 and the air warmed in the foam material 18 is discharged outside the vehicle, heat storage in the foam material 18 is performed while being naturally ventilated. Can be efficiently and reliably prevented.

  In addition, you may perform the forced ventilation which forcibly attracts | sucks using the blower of the air conditioning unit 6 from the upper channel | path 31. FIG. You may make the air in the air permeable foam layer 23 flow using the wind pressure at the time of driving | running | working. A shut valve may be provided in the lower passage 30 or the upper passage 31 to prevent air flow in the breathable foam layer 23 when it is unnecessary.

  Further, since the second infrared reflection layer 24 is provided on the foam material 18, the absorption of the infrared ray S into the core material 17 is further prevented, and the heat storage in the core material 17 is prevented.

  As mentioned above, since the 1st infrared reflective layer 20 and the 2nd infrared reflective layer 24 are provided in the whole surface of the instrument panel 1 including the upper surface part 1a where a solar ray hits most, the infrared rays S of a solar ray are Reflected and not absorbed by the instrument panel 1. Therefore, the temperature rise and heat storage of the instrument panel 1 are suppressed, the radiant heat from the surface of the instrument panel 1 is reduced, and the discomfort to the passenger is alleviated.

  In the above embodiment, the instrument panel 1 is taken as an example of the interior material, but the present invention can also be applied to a rear parcel and other interior materials.

The perspective view which shows the instrument panel which concerns on one Embodiment of this invention. Sectional drawing which follows the arrow SA-SA line in FIG. Sectional drawing which shows the structure of an instrument panel. Sectional drawing of a skin material.

Explanation of symbols

1 Instrument panel (interior material)
16 Skin material 17 Core material 18 Foam material 19 Design layer 20 First infrared reflective layer 22 Ceramic balloon (granular material with retroreflective effect)
23 Breathable foam layer 24 2nd infrared reflective layer 26, 27 Air duct 28, 29 Cut part 30 Lower passage 31 Upper passage S Infrared

Claims (5)

  An interior material for a vehicle, wherein an infrared reflecting layer (20, 24) is provided at least in a portion corresponding to the upper surface portion (1a). The vehicle interior material according to claim 1,
The interior material for vehicles, wherein the infrared reflective layer (20) contains a granular material (22) having a retroreflective effect. The vehicle interior material according to claim 1 or 2,
At least a structure comprising a skin material (16), a foam material (18) and a core material (17),
An interior material for a vehicle, wherein the surface of the skin material (16) is formed by a design layer (19) colored with an infrared transmitting pigment, and an infrared reflecting layer (20) is formed thereunder. It is an interior material for vehicles given in any 1 paragraph of Claims 1-3,
An interior material for a vehicle, wherein the foam material (18) is an open cell type having air permeability and includes a breathable foam layer (23) formed over the top and bottom. At least a structure comprising a skin material (16), a foam material (18) and a core material (17),
The foam material (18) includes a breathable foam layer (23) which is an open cell type having breathability and is formed over the top and bottom, and air ducts along the vehicle width direction at the lower and upper portions of the core material (17). (26, 27) are joined, a cut portion (28, 29) is formed in the core material (17) corresponding to each air duct (26, 27) to expose the breathable foam layer (23), The lower air duct (26) communicates with the space below the vehicle interior via the lower passage (30), and the upper air duct (27) communicates with the space outside the vehicle via the upper passage (31). Vehicle interior material.

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