JPS6337752B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention provides a
Concerning urethane resin fascias.

(Prior Art) Conventionally, as shown in FIG. 1, a resin fascia 1a is provided on the front side of a hood 2 of a vehicle body, and the outer surface 4a of this fascia 1a and the outer surface of the hood 2 are continuous. Some have a facia 1a formed thereon. In addition, 3 in the figure is a fender.

As such a resin fascia, for example, one described in Japanese Patent Application Laid-Open No. 57-66046 is known.

The resin fascia described in this publication is
It was formed by the SMC method, and the left and right sides of this fascia had stepped portions that were continuous with stepped portions extending in the longitudinal direction of the vehicle body on the outer surface of the vehicle body.

(Problem to be Solved by the Invention) By the way, for example, a fascia formed by RIM molding of urethane resin has a high degree of freedom in molding and is an elastic body, so it is difficult to integrate the bumper part and the outer panel part of the vehicle body. It has the advantage of being easy to construct.

However, the conventional resin fascia as described above has the following problems when the fascia is made of urethane resin.

In other words, such a urethane resin fascia has a large coefficient of thermal expansion, and its rigidity also decreases as the temperature increases, so it expands when the temperature reaches high temperatures, such as in summer, and especially in the longitudinal direction, that is, the width direction of the vehicle. The amount of deformation increases. However, since both ends and the upper part of the fascia are fixed to the vehicle body, a large displacement occurs in the non-fixed part of the fascia.

On the other hand, since the coefficient of thermal expansion of the car body (metal) side is extremely small compared to that of the fascia (urethane resin), the amount of deformation between the car body and the fascia is large, and large distortions such as differences in level occur between the two.

In addition, in order to prevent large distortions such as steps between the fascia and the vehicle body, the fascia's surface curvature and its size are restricted, which reduces the degree of freedom in shaping. It was hot.

The present invention provides a fascia made of urethane resin that is less likely to cause distortions such as steps between the outer surface of the vehicle body and the surface of the fascia when the temperature reaches high or low temperatures. The purpose is to provide.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, the outer surface of the fascia made of urethane resin is formed to be continuous with the outer surface of the vehicle body, and at least the outer surface of the fascia is formed of a urethane resin. A pair of side walls extending downward from the outer surface of the fascia and a bottom wall extending in the vehicle width direction and connecting the pair of side walls, which are fixed to the vehicle body at both ends in the width direction, and are located at appropriate positions on both ends of the fascia in the vehicle width direction. A recessed portion is provided, and the recessed portion has a shape in which at least a portion thereof is thinner than a portion forming the surrounding fascia outer surface, and whose depth gradually becomes shallower as it moves away from the vehicle body. The means by which it is formed.

The appropriate position for providing the recess is a position between the fixing points of the fascia to the vehicle body. In other words, when only both ends of the fascia in the vehicle width direction are fixed, the recess should be provided at least once. For example, if the fascia is fixed at the center of the fascia, two recesses are formed between the three fixing positions.

Furthermore, it is preferable that the parts other than the fixed parts on both sides of the fascia in the vehicle width direction be attached to the vehicle body so that they are free in the vehicle width direction and engaged in other directions (the above-mentioned vertical direction). .

(Function) The urethane resin fascia of the present invention expands when exposed to high temperatures. For example, under direct sunlight, fascia reaches a high temperature of about 90 to 100 degrees Celsius.
However, since both left and right end portions of this fascia are fixed to the vehicle body, stress in the width direction of the vehicle body is generated inside the fascia.

This stress is absorbed by the deformation of the part of the fascia that is most easily deformed, that is, the recess formed with a thin wall.

In other words, deformation does not occur in the parts that are continuous with the outer surface of the car body, but only in the recesses that are not continuous with the outer surface of the car body. No distortion occurs.

In addition, in terms of the front and back direction, the fascia is
The closer you get to the front end, the more the restraining effect of fixing both ends disappears, and the end becomes a so-called free end. Therefore, when the fascia expands, its elongation in the front-back direction is caused by the deformation of the front end.
There is no risk of distortion occurring, and the balance of internal stress throughout the facia is maintained.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIGS. 2 to 6, 1 indicates a fascia. This facia 1 is formed by RIM molding of urethane resin. It is fixedly attached to the front part of the vehicle body 5 at both left and right ends, and a recess 6 is formed in both the left and right ends of the fascia 1 so that it gradually becomes shallower as it moves away from the vehicle body 5 toward the front. . The fascia surface 4 other than the recessed portions is formed to be continuous with the surface of the vehicle body 5.

In addition, in this embodiment, the fascia 1 is located at both ends of the vehicle body 5 in the width direction as shown in FIGS. 4 and 5.
Attachment hole 11 provided in facia 1 as shown in the figure
It is fixed to the vehicle body 5 side by means of bolt tightening or the like.

A recess 6 is formed at a position closer to the center of the vehicle body than this fixed position, and this recess 6 is connected to a pair of vertical plate parts (corresponding to side walls in the claims) extending downward from the fascia surface 4. )7,7
and a bottom wall 61 that connects the lower ends of both vertical plate parts 7, 7 and extends in the vehicle width direction.

In addition, to attach the fascia 1 to the front of the vehicle body 5, use the long holes 1 in the fascia 1 except for the left and right ends.
2 (Fig. 5), and the part of this elongated hole 12,
As shown in FIG. 6, the fascia support member 8 and the retainer 9 are suspended by stepped bolts 10 to cope with dimensional changes due to thermal expansion of the fascia 1. In other words, while allowing the support position to move in the vehicle width direction, it engages and prohibits movement in the vertical and longitudinal directions.

In the fascia 1, the vertical plate portion 7 of the recess 6 is made thinner (for example, 3 to 5 mm), and the other portions forming the bottom wall 61 and the fascia surface 4 are made thicker (for example, 6 to 8 mm). There is.

As described above, since the recesses 6 are formed on the left and right sides of the fascia 1 made of urethane resin with both sides fixed, the recesses 6 become shallower as they move away from the vehicle body 5 side.
At high temperatures, the component of the thermal expansion of the urethane resin in the vehicle width direction is absorbed by the deformation of the vertical plate part 7 of the recessed part 6, which has a thin plate thickness, as shown in FIG. 4, no distortion occurs.

That is, in the vicinity of the proximal end of the fascia 1, both sides are fixed, and if the conventional method is used, there is a risk that, for example, distortion may occur in the central part of the fascia surface 4. As shown, it is floating and can follow expansion and contraction within the range of the long hole 12 provided in the fascia 1, and the expansion is absorbed by deformation in the recesses 6 at both left and right ends. The vertical plate portion 7 is connected to the vehicle body 5.
Since this part is not a continuous shaped part with the surface of the hood 2, even if deformation occurs in this part, there will be no difference in level between the part and the hood 2, and it will not be noticeable at all.

Therefore, no step is created between the fascia surface 4 and the surface of the hood 2.

On the other hand, the recess 6 becomes shallower as it moves forward from the vehicle body 5 side, but as it approaches the front end of the fascia 1, the influence of restraint at both ends disappears and it becomes a so-called free end, so even if there is thermal expansion. There is no possibility that distortion will occur in the facia 1.

Furthermore, if the recessed portion 6 is shaped for use as a relief for a headlamp, or for a fog lamp, horn, or air intake, even if the shape is deformed due to thermal expansion (see Figure 5), poor fit will be less noticeable in appearance. It's convenient.

In the above embodiment, as shown in the figure, an example was shown in which both side surfaces of the recess 6 become shallower so as to have a substantially triangular shape, but any shape such as a curved surface may be used as long as the shape becomes shallower toward the front end. It can be set to any shape.

(Effects of the Invention) As explained above, in the urethane resin fascia of the present invention, when the fascia reaches a high temperature, there is a
It is possible to prevent the occurrence of distortions such as steps, and to improve the appearance.

Furthermore, this effect removes restrictions on the surface curvature and size of the fascia, allowing greater freedom in shaping, including the fascia at the front of the vehicle body, which is used to prevent damage to the vehicle body in the event of a light collision, allowing for innovative designs. The effect is obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional resin fascia portion of the front part of a car body, Fig. 2 and the following shows an embodiment of the present invention, Fig.
The figure is an enlarged perspective view showing the resin fascia part in Fig. 2, Fig. 4 is a perspective view showing the main part of the resin fascia, Fig. 5 is a sectional view taken along line A-A in Fig. 3, and Fig. 6
The figure is a sectional view taken along line BB in FIG. 3. 1... Fascia, 2... Hood (vehicle body outer surface), 3... Fender, 4... Fascia surface, 5... Vehicle body, 6... Recessed part, 7... Vertical plate part,
8... Facial support member, 9... Retainer, 10... Stepped bolt.

Claims (1)

[Scope of Claims] 1. The outer surface of the fascia made of urethane resin is formed to be continuous with the outer surface of the vehicle body, and at least both ends in the vehicle width direction of the fascia are fixed to the vehicle body, and the vehicle width of the fascia is fixed to the vehicle body. Recesses formed from a pair of side walls extending downward from the outer surface of the fascia and a bottom wall extending in the vehicle width direction and connecting the pair of side walls are provided at appropriate positions on both ends of the fascia, and the recesses include at least A fascia made of urethane resin, characterized in that a part of the fascia is thinner than the surrounding parts that form the outer surface of the fascia, and the depth becomes gradually shallower as it moves away from the vehicle body.