JP2001138972A - Resin molded parts for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently ensure the rigidity of a resin molded part while minimizing degradation of its appearance even in the case of a large number of reinforcing ribs being formed on the back face of the resin molded part in such an arrangement as to converge almost on one point in the resin molded part of plate shape provided in the external exposed position of a vehicle. SOLUTION: Annular ribs 14 each of which annularly surrounds a converging point P of four reinforcing ribs 12 are formed on a back face 10b of the resin molded part 10 for the vehicle, and the end parts of the respective reinforcing ribs 12 are connected to the annular ribs 14. The number of converging ribs at the mutual connection part of the annular ribs 14 and the respective ribs 12 is set thereby three, so that the cross-section area A of the connection part is restrained from becoming large, and the generation of drawback on the surface of the resin molded part 10 is effectively suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-shaped resin molded part provided at an externally exposed position of a vehicle, and more particularly, to a rear surface in which a large number of reinforcing ribs are formed so as to be substantially concentrated at one point. And resin molded parts.

[0002]

2. Description of the Related Art A plate-shaped component provided at an externally exposed position of a vehicle such as an ornament (decorative member) provided at a rear portion of a vehicle body of a four-wheeled vehicle or a mudguard member covering a rear wheel of a two-wheeled vehicle is made of resin. Many are configured as molded parts. Also,
In such a plate-shaped resin molded part, a plurality of reinforcing ribs are often formed on the back surface thereof in order to secure required rigidity.

[0003]

However, as shown in FIG. 6, for example, as shown in FIG. 6, four (FIG. 6 (a)) or six (FIG. 6 (b)) on the back surface of the resin molded part 2. When the reinforcing ribs 4 are formed so as to be concentrated at one point P, since the cross-sectional area A of the connecting portion of each reinforcing rib 4 becomes large, sink marks are formed on the surface of the resin molded component 2 at the connecting portions. More likely to occur. Then, when such sink marks occur, there is a problem that the appearance of the resin molded component 2 provided at the externally exposed position of the vehicle is deteriorated.

[0004] Further, simply forming the plurality of reinforcing ribs 2 so as to concentrate at one point P as described above provides sufficient rigidity against, for example, a torsional load around the axis Ax as shown in FIG. There is also a problem that it cannot be secured.

The present invention has been made in view of such circumstances, and in a plate-shaped resin molded part provided at an externally exposed position of a vehicle, a large number of reinforcing ribs are concentrated on substantially one point on the back surface thereof. It is an object of the present invention to provide a resin molded part for a vehicle which can minimize deterioration in appearance of the resin molded part and sufficiently secure its rigidity even when formed in such an arrangement. Is what you do.

[0006]

According to the present invention, the above object is achieved by providing an annular rib at a predetermined position on the back surface of a resin molded part.

That is, the resin molded part for a vehicle according to the present invention is a plate-shaped resin molded part provided at an externally exposed position of the vehicle, wherein four or more reinforcing ribs are concentrated on a back surface substantially at one point. In the resin molded part formed in the arrangement, an annular rib surrounding the substantially one point in an annular shape is formed on the back surface, and ends of the reinforcing ribs are connected to the annular rib, respectively. Is what you do.

The above-mentioned "resin molded part" is not limited to a specific resin molded part as long as it is a plate-shaped member provided at an externally exposed position of a vehicle. , Cowls, etc., or ornaments, bumpers, lamps, etc. of four-wheeled vehicles can be adopted as applicable objects.

The specific configuration such as the shape and size of the "annular rib" is not particularly limited as long as it is formed so as to annularly surround the substantially single point where four or more reinforcing ribs are concentrated. Not something.

[0010]

As described above, the resin molded part for a vehicle according to the present invention has four or more reinforcing ribs formed on the rear surface thereof so as to be substantially concentrated at one point. On the back surface, an annular rib is formed so as to annularly surround the above-mentioned one point, and the end of each reinforcing rib is connected to this annular rib, so that the following operation and effect can be obtained. be able to.

That is, by adopting such a configuration, the number of concentrated ribs at the connecting portion between each reinforcing rib and the annular rib can be set to three, so that the cross-sectional area of the connecting portion is increased. Can be suppressed. Therefore, it is possible to effectively suppress the occurrence of sink marks on the surface of each of the connection parts of the resin molded part, thereby improving the appearance of the resin molded part when provided at the externally exposed position of the vehicle. be able to. In addition, by forming the annular rib, sufficient rigidity can be secured against a torsional load or the like acting around an axis passing through the substantially one point, and a bending load acting on the periphery of the substantially one point can be secured. However, sufficient rigidity can be ensured.

As described above, according to the present invention, when a plurality of reinforcing ribs are formed on a rear surface of a plate-shaped resin molded component provided at an externally exposed position of a vehicle so as to be substantially concentrated at one point. In this case, it is possible to minimize the deterioration of the appearance of the resin molded component and to sufficiently secure its rigidity.

In the above structure, if the reinforcing ribs and the annular ribs are formed to have substantially the same thickness as each other, it is possible to more effectively suppress sink marks and improve rigidity.

If the reinforcing ribs and the annular ribs are formed at substantially the same height, the continuity in strength between the ribs can be increased.

Although the specific configuration of the annular rib is not particularly limited as described above, if the annular rib is formed in a substantially circular shape, the rigidity of the resin molded part around the above point can be further improved. Can be.

If the inner diameter of the annular rib is too small, the surface of the resin molded part may be easily sinked due to the formation of the annular rib. On the other hand, the minimum inner diameter of the annular rib is 10 mm.
With the above setting, it is possible to eliminate the risk of sink marks due to the formation of the annular rib. In addition, by setting the minimum inner diameter of the annular rib to a somewhat large value of 10 mm or more, the rigidity of the resin molded part around the above points can be further improved.

When the resin molded part is a mudguard member for covering the rear wheel of a two-wheeled vehicle, the resin molded part is often formed integrally with the lamp body of the vehicle lamp. In such a case, it is particularly effective to employ the above-described configuration, because the size of the resin molded component is increased, so that the moldability tends to deteriorate.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a rear view showing a resin molded part 10 for a vehicle according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along the line II-II of FIG. 1 and a detailed view of a part III.

As shown in these figures, this resin molded part 10 is a mudguard member that covers the rear wheel of a two-wheeled vehicle, and is provided at a position outside the vehicle. The resin molded component 10 is formed integrally with the lamp body 22 of the vehicular lamp 20.

The vehicular lamp 20 is a tail and stop lamp provided at the rear part of the vehicle body, and has a light source bulb 26 provided in a lamp room formed by a lamp body 22 and a lens 24.

The resin molded part 10 is a plate-like member extending obliquely downward from the lower wall portion 22a of the lamp body 22 toward the vehicle rear side, and its surface 10a is constituted by a smooth surface. A large number of reinforcing ribs 12 are provided on the back surface 10b.
In addition, an annular rib 14 and a peripheral flange 16 are formed.

The reinforcing ribs 12 are formed such that four reinforcing ribs are concentrated at each of a plurality of points P set at equal intervals in the vertical direction at the center position in the left-right direction on the back surface 10b of the resin molded component 10. These four reinforcing ribs 12 extend linearly so as to concentrate on the point P from both the upper and lower sides and the lower left and right sides.

The annular ribs 14 are arranged vertically at equal intervals so as to surround each point P in a circular shape when viewed from the rear.
Each of the annular ribs 14 has four reinforcing ribs 1.
The reinforcing ribs 12 and the annular ribs 14 to which the two ends are connected are the same in thickness (for example, about 1 mm).
And at the same height (for example, about 10 mm). The inner diameter D of each annular rib 14 is 10 mm.
The above value (for example, about 14 mm) is set.

The peripheral flange 16 is formed over the entire periphery from the lower wall portion 22a of the lamp body 22 to the peripheral portion of the back surface 10b. The thickness dimension of the peripheral flange 16 is set to a value (for example, 2 mm) larger than each reinforcing rib 12 and the annular rib 14.

As described in detail above, the resin molded part 10 for a vehicle according to the present embodiment is formed with four reinforcing ribs 12 arranged on the back surface 10b so as to be concentrated at one point P. An annular rib 14 surrounding the point P in an annular shape on the back surface 10b.
Are formed, and each of the reinforcing ribs 12 is
Are connected to each other, the following operational effects can be obtained.

That is, by adopting such a configuration, as shown in FIG. 3, the number of concentrated ribs at the connection portion between each reinforcing rib 12 and the annular rib 14 can be reduced to three. It is possible to suppress an increase in the sectional area A of the portion. Therefore, the resin molded part 10
Can effectively suppress the occurrence of sink marks on the surface 10a of each connection portion, thereby improving the appearance of the resin molded part 10 when provided at the externally exposed position of the vehicle. . Further, since the annular rib 14 is formed, sufficient rigidity can be secured against a torsional load or the like acting around an axis passing through the point P, and also against a bending load acting around the point P. Sufficient rigidity can be secured.

As described above, according to the present embodiment, in the plate-shaped resin molded component provided at the externally exposed position of the vehicle,
Even when a large number of reinforcing ribs are formed on the rear surface so as to be concentrated at one point, it is possible to minimize the deterioration of the appearance of the resin molded part and sufficiently secure its rigidity. .

Moreover, in the present embodiment, since the reinforcing ribs 12 and the annular ribs 14 are formed to have the same thickness, the rigidity can be improved while suppressing the occurrence of sink marks more effectively. Further, since the reinforcing ribs 12 and the annular ribs 14 are formed at the same height, the continuity in strength between the respective ribs can be increased.

Furthermore, since each annular rib 14 is formed in a circular shape when viewed from the rear, the rigidity of the resin molded component 10 around the point P can be further improved. At this time, since the inner diameter D of the annular rib 14 is set to a somewhat large value (10 mm or more), the annular rib 14
Can be eliminated, and the rigidity of the resin molded component 10 around the point P can be further improved.

The resin molded part 10 according to the present embodiment
A mudguard member that covers the rear wheel of a wheeled vehicle.
It is particularly effective to adopt the configuration of the present embodiment since it is a large-sized resin molded part formed integrally with the lamp body 22 and its moldability tends to deteriorate.

FIG. 4 is a view similar to FIG. 3, showing a modification of the above embodiment.

As shown in the drawing, in this modification, six reinforcing ribs 12 are formed so as to be concentrated at one point P from both upper and lower sides, left and right diagonally above, and left and right diagonally below. The annular rib 14 is formed so as to surround the point P in a regular hexagonal shape when viewed from the rear, and ends of the six reinforcing ribs 12 are connected to the respective corners.

Also in this modification, the reinforcing ribs 12 and the annular ribs 14 have the same thickness and the same height. The minimum inner diameter D of each annular rib 14 is set to a value of 10 mm or more (for example, about 14 mm).

Even when the configuration of this modification is adopted, the number of concentrated ribs at the connection portion between each reinforcing rib 12 and the annular rib 14 can be set to three, so that the same operation and effect as in the above embodiment can be obtained. Obtainable.

Moreover, in this modification, the cross-sectional area A of the connecting portion between the reinforcing ribs 12 and the annular ribs 14 can be made smaller than that of the above-described embodiment. The occurrence of sink marks on the surface can be more effectively suppressed.

In the above embodiment, a case has been described in which the central axes of the plurality of reinforcing ribs 12 are formed so as to be accurately concentrated at one point P.
As shown in FIG. 5, the central axis of the plurality of reinforcing ribs 12 is
Even in the case where they are formed so as to be concentrated at positions slightly deviated from one point P, the same operation and effect as in the above embodiment can be obtained by adopting the same configuration as in the above embodiment. Rather, when the plurality of reinforcing ribs 12 are formed in such an arrangement, if the annular ribs 14 do not exist, the thickness of the connecting portion between the reinforcing ribs 12 becomes large. Forming 14 is more effective.

In the above embodiment, the case where each reinforcing rib 12 is formed in a straight line has been described. However, even when each reinforcing rib 12 is formed in a curved shape, the same as in the above embodiment is used. By adopting the configuration, the same operation and effect as the above embodiment can be obtained.

Further, in the above-described embodiment, the case where the resin molded part 10 is formed integrally with the lamp body 22 of the vehicle lamp 20 has been described. Alternatively, even in the case of being formed integrally with another member, the same operation and effect as in the above embodiment can be obtained by adopting the same configuration as in the above embodiment.

[Brief description of the drawings]

FIG. 1 is a rear view showing a resin molded part for a vehicle according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a detailed view of a part III in FIG. 1;

FIG. 4 is a view similar to FIG. 3, showing a modification of the embodiment.

FIG. 5 is a view similar to FIG. 3, showing another modification of the embodiment.

FIG. 6 is a view similar to FIG. 3, showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Resin molded part 10a Front surface 10b Back surface 12 Reinforcement rib 14 Annular rib 16 Peripheral flange 20 Vehicle lamp 22 Lamp body 22a Lower wall part 24 Lens 26 Light source bulb

Claims (6)

[Claims] 1. A resin molded component having a plate shape provided at an externally exposed position of a vehicle, wherein four or more reinforcing ribs are formed on an underside of the resin molded component so as to be substantially concentrated at one point. A resin molded part for a vehicle, wherein an annular rib surrounding the substantially one point in an annular shape is formed on a back surface, and ends of the reinforcing ribs are respectively connected to the annular rib. 2. Each of the reinforcing ribs and the annular rib is
The resin molded part for a vehicle according to claim 1, wherein the parts are formed to have substantially the same thickness. 3. Each of the reinforcing ribs and the annular rib is
The resin molded part for a vehicle according to claim 1 or 2, wherein the molded parts are formed at substantially the same height as each other. 4. The resin molded part for vehicles according to claim 1, wherein said annular rib is formed in a substantially circular shape. 5. A minimum inner diameter of the annular rib is 10 mm.
2. The method according to claim 1, wherein the value is set to the above value.
5. The resin molded part for a vehicle according to any one of items 4 to 4. 6. The resin molded part is a mudguard member for covering a rear wheel of a motorcycle, and is formed integrally with a lamp body of a vehicle lamp. The resin molded part for a vehicle according to any one of the above.