JP2001260944A - Fender protector structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fender protector structure for a vehicle making a fender protector hardly interfere with a tire and showing excellent synthetic resin flow assisting performance at the injection molding of the fender protector. SOLUTION: The arch-shaped fender protector 1 injection-molded with a synthetic resin is fitted to the inner side of a wheelhouse 2 covering above the tire 3 in this fender protector structure for a vehicle. The thickness of the general part of the fender protector is set to 0.8-1.3 mm, and a rib 6 for assisting a synthetic resin flow at injection molding is formed on its outside face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a fender protector structure for a vehicle, and more particularly, to a fender protector structure for a vehicle capable of achieving surface rigidity and fluidity of synthetic resin while reducing the weight by reducing the thickness. .

[0002]

2. Description of the Related Art A fender protector is mounted inside a wheel house that covers an upper part of a tire. This fender protector is an injection molded product made of synthetic resin.
It has an arch shape corresponding to the upper shape of the tire. Such a fender protector is formed thin in order to reduce the weight.

However, since the rigidity is reduced by the reduction in thickness, for example, an actual open flat 2-1589 is used to compensate for the reduction.
As is known from Japanese Patent Publication No. 0, a rib is formed along the longitudinal direction on the inner surface (lower surface) of the fender protector. Further, in the mold for molding the fender protector, the space corresponding to the rib also serves as a passage through which the synthetic resin flows in the mold at the time of injection molding. Of the synthetic resin) can be prevented.

[0004]

However, in such a conventional technique, since the rib is formed on the inner surface of the fender protector, the rib may interfere with the rib at the time of maximum bounce of the tire.

Further, since the ribs are formed on the inner surface of the arched fender protector, the tips of the ribs formed along the longitudinal direction of the fender protector are:
The inward state is concentrated (reduced) in the longitudinal direction toward the arch-shaped center (necessary). Therefore, the capacity of the synthetic resin flow path corresponding to the rib in the mold is reduced as a whole, which is disadvantageous in terms of performance for supporting the flow of the synthetic resin during injection molding.

The present invention has been made by paying attention to such a conventional technique, and is intended for a vehicle which exhibits excellent synthetic resin flow support performance at the time of injection molding of a fender protector, since the fender protector does not easily interfere with a tire. A fender protector structure is provided.

[0007]

According to a first aspect of the present invention, there is provided a vehicle fender protector structure for mounting an arched fender protector injection-molded with a synthetic resin inside a wheel house covering an upper portion of a tire. The thickness of the general part of the fender protector is 0.8 to 1.3 mm
A rib is formed on the outer surface to assist the flow of the synthetic resin during injection molding.

According to the first aspect of the present invention, the fender protector is light in weight because the fender protector has a thickness of 0.8 to 1.3 mm. Further, since the ribs are formed on the outer side surface of the fender protector, even if the tire bounces high, it does not easily interfere with the fender protector. The ribs formed on the outer surface of the arch type fender protector are in an outward state radiated (diffused) in the longitudinal direction. Accordingly, the capacity of the synthetic resin flow path corresponding to the rib in the mold becomes larger as compared with the conventional inward state, and the performance of supporting the flow of the synthetic resin during injection molding is improved.

According to the second aspect of the present invention, the rib has a sectional shape in which the height is larger than the width.

According to the second aspect of the present invention, since the height size of the rib is larger than the width size, the synthetic resin flow path corresponding to the rib in the mold becomes deep, and the synthetic resin flows when the synthetic resin flows. The temperature drop is small, and the performance of supporting the flow of the synthetic resin is further improved.

According to the third aspect of the invention, the width of the rib is about 2.5 times the plate thickness of the general portion of the fender protector, and the height is about 3.5 times the plate thickness.

According to the third aspect of the present invention, since optimum experimental values regarding the height size and the width size of the rib are provided, the implementation is easy.

According to the fourth aspect of the invention, the rib has a curved cross-sectional shape in which the root is widened.

According to the fourth aspect of the present invention, since the rib has a curved cross-sectional shape in which the root is widened, not only the surface rigidity of the fender protector is improved, but also the impact resistance is improved.

According to a fifth aspect of the present invention, the rib is formed from a synthetic resin injection gate.

According to the fifth aspect of the present invention, since the rib is formed from the synthetic resin injection gate, the synthetic resin injected into the mold corresponds to the synthetic resin corresponding to the rib in the mold from the gate. The ability to flow directly into the flow channel to support the flow of the synthetic resin is further improved.

According to a sixth aspect of the present invention, a rib in the same direction as the outer surface is formed only on a portion substantially corresponding to the synthetic resin injection gate on the inner surface of the fender protector in the synthetic resin injection gate.

According to the sixth aspect of the present invention, since the rib is also formed on the inner surface of the fender protector in the synthetic resin injection gate, the performance of supporting the flow of the synthetic resin is further improved. Further, since the rib is formed only in a portion substantially corresponding to the synthetic resin injection gate, there is no problem of interference with the tire.

According to the invention described in claim 7, the ribs are formed in a continuous state along the longitudinal direction of the fender protector.

According to the seventh aspect of the present invention, since the ribs are formed continuously along the longitudinal direction of the fender protector, the synthetic resin is injected along the longitudinal direction to every corner of the fender protector during injection molding. Can be fluidized.

According to the eighth aspect of the present invention, the attachment portion to the wheel house in the fender protector is formed thicker than the general portion.

According to the eighth aspect of the present invention, the mounting portion of the fender protector to the wheel house is formed thicker than the general portion. Therefore, even if the fender protector itself is thin, it is necessary for the wheel house. The mounting strength is obtained.

According to the ninth aspect of the present invention, the rib is continuous with the mounting portion.

According to the ninth aspect of the present invention, since the rib is continuous with the mounting portion, even if the mounting portion is thick, the synthetic resin can be reliably poured into the mounting portion and molded.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS.

The fender protector 1 is an injection-molded product made of a synthetic resin, and is mounted inside a wheel house 2 of an automobile. As a whole, an intermediate portion has an arch shape curved upward, and covers an upper portion of the tire 3. In the fender protector 1, a plurality of embossed portions 4 for securing rigidity are formed at a front end portion and a central portion along a longitudinal direction. The embossed portion 4 is formed outward from the fender protector 1, and a plurality of synthetic resin injection gates 5 for injection-molding the fender protector 1 are formed at the top or other portion of the embossed portion 4.

On the outer surface of the fender protector 1, a rib 6 extending in the longitudinal direction while cranking is formed integrally with the fender protector 1 while passing through the synthetic resin injection gate 5 (the thick line portion in FIGS. 1 and 2). Is rib 6). There is also a portion extending from the rib 6 in a branch shape in the width direction. The fender protector 1 has a thickness t of a general portion of 1 mm (0.8 to 1.3 m).
m is acceptable) and the weight is reduced. In addition, as shown in FIG.
At 5 mm, the width size B is 2.5 mm, and the height size A has a larger cross-sectional shape than the width size B (A> B). The root of this rib 6 is R
It has a curved cross-sectional shape that spreads with a degree of curvature of 1.5 mm. Only the portion of the rib 6 corresponding to the synthetic resin injection gate 5 is provided with a rib 7 (see FIG. 5) on the inner surface thereof in the same direction as the outer surface, having a length substantially corresponding to the synthetic resin injection gate 5. It is formed only in the range.

Around the fender protector 1, a mounting portion 8 for the wheel house 2 is also formed. The thickness T of the mounting portion 8 (see FIG. 6) is larger than the thickness t of the general portion, and is formed to be about 3 mm. Therefore, even if the general portion of the fender protector 1 is thin, the necessary rigidity for mounting the wheel house 2 on the wheel house 2 is ensured. In the three mounting portions 8a of the mounting portions 8, the ends of the ribs 6 are continuous.

Next, when the fender protector 1 is injection-molded, the fender protector 1 is assembled into the upper mold 9 in a space formed between the upper mold 9 and the lower mold 10. A synthetic resin is injected from the hot runner 11. The location where the synthetic resin is injected from the hot runner 11 becomes the synthetic resin injection gate 5. Since the thickness of the fender protector 1 is small, the space formed between the upper and lower molds 9 and 10 is
Although the vertical dimension is narrow and there is a surface on which the synthetic resin hardly flows, the rib 6 is formed on the outer surface of the fender protector 1 as described above. Since the space inside the molds 10 and 10 also serves as a passage through which the synthetic resin flows, the fluidity of the synthetic resin is ensured even if the vertical dimension of the space between the dies 9 and 10 is narrow.

In particular, since the rib 6 is formed on the outer surface of the arch type fender protector 1, the rib 6
An outward state is emitted (diffused) in the longitudinal direction. Therefore, the capacity of the synthetic resin flow path corresponding to the ribs 6 in the molds 9 and 10 is larger than the conventional inward state as a whole, and the performance of supporting the flow of the synthetic resin during injection molding is high. Since the ribs 6 are formed continuously along the longitudinal direction of the fender protector 1, the synthetic resin can flow to every corner of the fender protector 1 along the longitudinal direction during injection molding.

Moreover, since the height size A of the rib 6 is larger than the width size B, the synthetic resin flow path corresponding to the rib 6 in the dies 9 and 10 becomes deep, and the synthetic resin temperature during the flow of the synthetic resin is reduced. The decrease is small, and the performance of supporting the flow of the synthetic resin is further improved. The height A of the rib 6 of 3.5 mm and the width B of 2.5 mm are actual test values at which the highest synthetic resin flow support performance is obtained. Further, in this embodiment, the rib 6 is formed of
Therefore, the synthetic resin injected into the molds 9 and 10 flows directly into the synthetic resin flow path corresponding to the rib 6, and the performance of supporting the flow of the synthetic resin is further improved.

Then, at the synthetic resin injection gate 5 portion,
Since the short ribs 7 are also formed on the inner surface, the performance of supporting the flow of the synthetic resin is further improved. This rib 7
Does not cause the problem of interference with the tire 3 because it is short. In addition, since the ends of the ribs 6 are also connected to some of the attachment portions 8a, even if the thickness of the attachment portions 8 is large, the synthetic resin can be reliably poured.

In the fender protector 1 thus formed by injection molding, the rib 6 is formed on the outer surface of the fender protector 1, so that even if the tire 3 bounces high, it does not easily interfere with the fender protector 1. Further, since the root of the rib 6 has a curved cross-sectional shape that is widened, not only the surface rigidity of the fender protector 1 is improved, but also the impact resistance is improved.

[0034]

According to the present invention, the fender protector is lightweight because it is thin with a thickness of 0.8 to 1.3 mm. Further, since the rib is formed on the outer surface of the fender protector, even if the tire is bound high, it is difficult to interfere with the fender protector. The ribs formed on the outer surface of the arch type fender protector are in an outward state radiated (diffused) in the longitudinal direction. Accordingly, the capacity of the synthetic resin flow path corresponding to the rib in the mold becomes larger as compared with the conventional inward state, and the performance of supporting the flow of the synthetic resin during injection molding is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a fender protector according to an embodiment of the present invention.

FIG. 2 is a plan view showing the fender protector.

FIG. 3 is a sectional view taken along the line SA-SA shown in FIG. 2;

FIG. 4 is an enlarged sectional view showing a portion indicated by an arrow DA in FIG. 3;

FIG. 5 is a sectional view taken along the line SB-SB shown in FIG. 2;

FIG. 6 is an enlarged perspective view showing a mounting portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fender protector 2 Wheel house 3 Tire 4 Emboss part 6 Rib (outside surface) 7 Rib (inside surface) 8, 8a Attachment part 9, 10 Die 11 Hot runner A Rib height size B Rib width size t Rib General part thickness T Mounting part thickness

Claims (9)

[Claims] 1. A fender protector structure for a vehicle in which an arc-shaped fender protector injection-molded with a synthetic resin is mounted inside a wheel house covering an upper portion of a tire, wherein a thickness of a general portion of the fender protector is 0.8 to 1.
A fender protector structure for a vehicle, characterized in that a rib of 3 mm is formed on an outer surface thereof for supporting resin flow during injection molding. 2. The vehicle fender protector structure according to claim 1, wherein the rib has a cross-sectional shape whose height is larger than its width. Protector structure. 3. The fender protector structure for a vehicle according to claim 2, wherein a width of the rib is about 2.5 times a thickness of a general portion of the fender protector, and a height of the rib is about 2.5 times. About 3 of thickness.
A fender protector structure for a vehicle, which is five times as large. 4. The fender protector structure for a vehicle according to claim 1, wherein a root of the rib has an expanded curved cross-sectional shape. Protector structure. 5. The vehicle fender protector structure according to claim 1, wherein the rib is formed of a synthetic resin injection gate. . 6. The fender protector structure for a vehicle according to claim 5, wherein a rib in the same direction as the outer surface on the inner surface of the fender protector of the synthetic resin injection gate substantially corresponds to the synthetic resin injection gate. A fender protector structure for a vehicle, which is formed only in a portion. 7. The vehicle fender protector structure according to claim 1, wherein the rib is formed in a continuous state along a longitudinal direction of the fender protector. Fender protector structure for vehicles. 8. The fender protector structure for a vehicle according to claim 1, wherein a mounting portion of the fender protector to a wheel house is formed to be thicker than a general portion. Vehicle fender protector structure. 9. The fender protector structure for a vehicle according to claim 8, wherein the rib is continuous with a mounting portion.