JP4246313B2 - Vehicle floor pad - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of a floor pad that is disposed on a floor panel of a vehicle and raises a position of a bottom surface on a vehicle compartment side.
[0002]
[Prior art]
Recently, it has been attempted to reduce the vehicle cost by sharing the floor panel for different vehicle types. In this case, in order to make the shape of the bottom of the passenger compartment side different according to the vehicle type It is possible to foam and mold polypropylene resin (PP) into an appropriate shape to form a relatively lightweight and highly rigid floor pad, which is placed on the floor panel and raises the bottom of the passenger compartment side Has been tried.
However, PP foam has a problem in heat resistance because its rigidity is reduced by heat, and it has a relatively high rigidity, so that vibration of the floor panel is easily transmitted to the vehicle interior side, and at the same time, When the pad is displaced, an unpleasant squeak noise may occur at the contact surface between the floor panel and the PP foam material, which may impair the comfort of the passenger compartment.
[0003]
[Problems to be solved by the invention]
The present invention intends to improve the heat resistance of a floor pad arranged on a floor panel of a vehicle and simplify the formation of a flow path for high-temperature gas in a vehicle interior .
[0004]
[Means for Solving the Problems]
For this reason, the vehicle floor pad according to the first aspect of the present invention is made of a foamed resin molding material disposed on a vehicle floor panel, and the inner surface of the hole formed in the foamed resin molding material is a fiber. The material and the foamed urethane resin chip are mixed and covered with a soft molding material integrated into a thin layer by a binder, and a flow path for high-temperature gas is formed in the inner surface hollow portion of the soft molding material .
[0005]
That is, the inner surface of the hole portion of the floor pad that is disposed on the floor panel of the vehicle and formed of the foamed resin molding material is covered with the soft molding material, and the foamed resin molding material and the central portion of the hole portion are soft molded. Since the heat is shut off by the heat insulating property of the material, the flow path of the high-temperature gas remains in the center of the hole of the floor pad, that is, the inner surface hollow portion of the soft molding material without adversely affecting the foamed resin molding material. Can be used as
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described.
A floor pad 2 disposed on a vehicle floor panel 1 is a thin-layer soft body that covers a main body 3 made of a PP foam material, an entire outer surface of the main body 3, and an entire inner surface of a round hole 4 formed in the main body 3. The PP foam material of the main body 3 is formed by foaming and molding foam beads from 10 times to 45 times, and forming many fine closed cells. Is formed finely, when a 65 kg compression load is applied to a circular area having a diameter of 15 mm with respect to the surface of the PP foam material having a thickness of 70 mm, the dent amount on the surface of the PP foam material is 20 mm or less. Is relatively high in rigidity against a compressive load, while the density is relatively small at 0.02 to 0.09 g / cc, and the floor pad 2 can be reduced in weight.
[0007]
The flexible molding material 5 is a thin layer integrated by mixing a fiber material loosened with fiber felt and the foamed urethane resin chip and bonding them together with a resin binder.
[0008]
As a manufacturing method of the floor pad 2, for example, the main body 3 made of a PP foam material is foamed and molded into a predetermined shape as described above, and on the other hand, fiber felt waste 40 to 60% by weight ratio, soft urethane foam waste 30 -40% and isocyanate binder 10-20% are mixed, and then charged into a predetermined mold, and a thin-layer soft molding material having a shape that appropriately covers the entire outer surface of the main body 3 and the entire inner surface of the round hole 4 of the main body 3 5 is cured and molded by steam heating, and the floor pad 2 is manufactured by adhering the soft molding materials 5 to the outer surface of the main body 3 and the inner surface of the round hole 4, respectively, or cured and molded. The thin-layered soft molding material 5 is appropriately disposed in a PP foam molding die, and the foam beads are foamed and molded in the molding die as described above. Same as forming To, to produce a floor pad 2 by joining the main body 3 and flexible molded material 5.
[0009]
In addition, when PP foam alone is placed on a hot plate and heated at 90 ° C. for 1 hour by the hot plate, it melts and deforms, and its rigidity is greatly lost, but the thickness is 5 mm. When a PP foam material is placed on a hot plate with the soft molding material 5 sandwiched between them and heated at 130 ° C. for 1 hour by the hot plate, the PP foam material does not melt or deform due to the heat insulating properties of the soft molding material 5 Since the rigidity can be sufficiently maintained, the thickness of the soft molding material 5 is preferably 5 mm or more in order to ensure the heat insulation by the soft molding material 5.
[0010]
In addition, the soft molding material 5 has a larger specific gravity than the PP foam material and has a large amount of deformation with respect to the compression load. Therefore, the thickness of the soft molding material 5 is set to 50 mm or less, and the floor pad 2 is sufficiently reduced in weight and rigidity. It is desirable to secure it.
[0011]
The floor pad 2 disposed on the vehicle floor panel 1 is such that the entire outer surface of the main body 3 made of PP foam material is covered with the soft molding material 5, and the lower surface of the main body 3 facing the floor panel 1 and the floor panel 1. Since the soft molding material 5 is interposed between the floor panel 1 and the floor pad 2 may be heated, the heat insulation property of the soft molding material 5 prevents the temperature of the main body 3 from rising. Therefore, the rigidity of the PP foam material of the main body 3 can be maintained, and the rigidity as the floor pad 2 can be sufficiently retained. Therefore, even if a high compressive load is applied to the floor pad 2, this can be easily performed. It becomes possible to support.
[0012]
Further, since the soft molding material 5 is interposed between the lower surface of the main body 3 and the floor panel 1, the vibration of the floor panel 1 is attenuated by the soft molding material 5 and is not easily transmitted to the main body 3 of the PP foam material. At the same time, the vehicle interior side, which is the upper surface of the main body 3, is also covered with the soft molding material 5, and the vibration is hardly transmitted from the main body 3 to the vehicle interior side due to the vibration damping force of the soft molding material 5. Therefore, it is possible to effectively and reliably suppress the vibration of the floor panel 1 from being transmitted to the vehicle interior side.
[0013]
Moreover, since the soft molding material 5 is interposed between the lower surface of the main body 3 and the floor panel 1, when the floor pad 2 is displaced with respect to the floor panel 1, the floor panel 1 and the floor pad 2 Occurrence of a squeaking noise on the contact surface can be reliably suppressed. Therefore, in combination with the above-described vibration damping characteristics of the floor pad 2, the comfort in the vehicle compartment can be maintained well.
[0014]
Further, the entire inner surface of the round hole 4 formed in the main body 3 of the floor pad 2 is covered with a soft molding material 5 having good heat insulation, and the PP foam material of the main body 3 and the central portion of the round hole 4 are heated. Since it is shut off, the central part of the round hole 4 can be used as it is as a high-temperature gas flow path such as a heater duct without adversely affecting the main body 3. In addition, there is a practical advantage that the number of parts required for arranging the duct can be easily reduced.
[0015]
In the above embodiment example, the floor pad main body is formed of a PP foam material, but even if this is replaced with a styrene resin foam material, the same effects as the above embodiment example can be achieved, Further, when the floor pad does not particularly require rigidity, it is possible to replace the highly rigid resin foam in each of the above embodiments with a relatively low rigidity such as urethane resin foam. Not too long.
[0016]
【The invention's effect】
In the vehicle floor pad according to the first aspect of the present invention, the inner surface of the hole is covered with the soft molding material, and the foamed resin molding and the center of the hole are thermally shielded. The center of the hole in the floor pad can be used as it is as a high-temperature gas flow path such as a heater duct without adversely affecting the molding material, making it very easy to arrange the high-temperature gas duct in the passenger compartment. In addition, there is an advantage that the number of parts required for the duct can be easily reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part in an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Floor panel 2 Floor pad 3 Main body 4 Round hole 5 Soft molding material

Claims (1)

It consists of a foamed resin molding material arranged on the floor panel of the vehicle, and the inner surface of the hole formed in the foamed resin molding material is mixed with a fiber material and a foamed urethane resin chip and integrated into a thin layer by a binder. A vehicle floor pad covered with a soft molding material and having a flow path for high-temperature gas formed in an inner hollow portion of the soft molding material .

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