JP4721982B2 - Fender protector - Google Patents

Description

  The present invention relates to a fender protector that is attached to a vehicle such as an automobile and protects the vehicle body, and in particular, is lightweight and excellent in rigidity, and can be easily bent by being appropriately bent at the time of attaching to the vehicle. Further, the present invention relates to a fender protector that does not have molding defects such as air tight generated during injection molding.

  In general, a fender protector that covers an upper portion of a tire is attached to an automobile, for example, inside a wheel house of the vehicle body in order to protect the vehicle body from scattering of muddy water and pebbles flying up during traveling. This fender protector is manufactured by injection molding a synthetic resin material into a predetermined shape, and generally has a shape that is curved in a substantially inverted U shape or arch shape so as to cover a part of the tire from above. Furthermore, in order to reduce the weight of the fender protector itself, it is formed in a thin plate shape of about 0.8 to 1.5 mm.

  Such a fender protector is required to secure a certain degree of rigidity and strength for the function of protecting a vehicle body such as a fender panel while maintaining a predetermined shape. However, when the fender protector is formed thin for weight reduction as described above, there is a problem that the rigidity thereof is lowered. Further, when a thin fender protector is molded, the cross section of the resin flow path inevitably narrows in the mold cavity during injection molding, so that the flow resistance of the synthetic resin material flowing in the cavity increases. For this reason, the synthetic resin material is not completely filled in the cavity but solidifies by cooling, and a molding defect called short shot (poor filling) may occur.

  Therefore, conventionally, in order to solve the above-described problems, ribs are arranged in a predetermined direction on one surface of the fender protector. By forming such a rib, a fender protector can be reinforced and rigidity can be improved. At the same time, at the time of injection molding, the portion where the rib is formed becomes a flow path (space) to support the flow of the synthetic resin material, so that the synthetic resin material is stably filled and short shots are generated. Can be effectively prevented.

  An example of a fender protector in which such ribs are formed is disclosed in Japanese Patent Laid-Open No. 2001-260944 (Patent Document 1). For example, as shown in FIGS. 8 and 9, the fender protector 31 disclosed in Patent Document 1 has a thin plate shape of 0.8 to 1.3 mm and an arched shape, and the surface side thereof. Ribs 36 are formed along the longitudinal direction. Further, the rib 36 is provided so as to pass over an injection gate 35 for injecting a synthetic resin material when the fender protector 31 is injection-molded.

  In the fender protector 31 of Patent Document 1, since the rib 36 is formed on the front surface side of the fender protector 31, for example, compared to the case where the rib is formed on the back surface side, a synthetic resin is formed in the mold during injection molding. The capacity of the flow path through which the material flows is increased, and the performance for supporting the flow of the synthetic resin material is improved. Further, since the rib 36 is arranged on the surface side of the fender protector 31, when the fender protector 31 is attached to the vehicle, even if the tire bounces high when the vehicle travels, the tire and the rib 36 are difficult to interfere with each other. It is said.

  As shown in FIG. 9, the fender protector 31 is provided with attachment portions 38 and 38a that are thicker than the protector main body at predetermined positions on the edge of the fender protector 31 in order to stably attach the vehicle to the vehicle. The mounting rigidity to the vehicle is secured. Further, ribs 36 that support the flow of the synthetic resin material are directly connected to the three attachment portions 38a. As a result, the synthetic resin material can be reliably poured into the thick attachment portion 38a disposed at the edge of the protector body at the time of injection molding.

  By the way, as shown in FIG. 8, the fender protector 31 of Patent Document 1 includes an arch-shaped curved portion 32 and a flat-plate-shaped front end side extended portion 33 that is bent and extends to the front end of the curved portion 32. And. The curved portion 32 has a curved surface (especially, a curved surface on the rear side of the vehicle body) that is easily subjected to wind pressure from the tire when the vehicle is running, and further collides with pebbles and the like that are flipped up by the tire. In addition, the front end side extending portion 33 is not only applied with a load as an attaching portion when attached to the vehicle, but also acts in the direction of peeling from the vehicle due to the action of air flowing near the ground when the vehicle travels, Deformation is likely to occur.

  Therefore, it is necessary to sufficiently increase the rigidity and strength of the curved portion 32 and the front end side extending portion 33. For this reason, in the said patent document 1, the device of providing the embossed part 34 in the curved part 32 or the front end side extension part 33, making arrangement | positioning of the rib 36 complicated, or making it closely packed is made | formed. . However, in order to increase the rigidity and strength of the fender protector 31, if too many embossed portions 34 and ribs 36 are provided, the flexibility of the fender protector 31 is reduced, and the fender protector 31 is attached to the vehicle. Defects such as poor workability of mounting occurred.

  Therefore, in recent years, for example, the structure of a fender protector 41 as shown in FIG. 10 is effective to effectively improve the rigidity and strength of a portion where the fender protector is likely to be deformed or damaged, and to ensure good mounting workability. Has been proposed. In the fender protector 41 shown in FIG. 10, the curved portion 42 curved in a substantially inverted U shape, the substantially fan-shaped front end side extending portion 43, and the front end side extending portion 43 on the front inner side of the curved portion 42. The protector main body is constituted by the side wall 44 arranged at a right angle to the side. In FIG. 10, when the fender protector 41 is attached to the automobile, the traveling direction of the automobile is the forward direction and the backward direction is the backward direction. Further, the side of the fender protector 41 facing the engine room is set as the inside, and the side facing the outside is set as the outside.

  In the fender protector 41, a step edge 46 having a step is provided on the outer edges of the curved portion 42 and the front end extending portion 43, and a part of the step edge 46 in the curved portion 42 is provided. And the step edge part 46 of the front end side extension part 43 is formed as the thick-walled edge part 45 thicker than a protector main body. In this case, the thickness of the thin plate-like portion of the protector body is, for example, about 0.8 mm to 1.5 mm, whereas the thickness of the thick edge 45 is set to about 2.5 mm. . A notch 53 for inserting a vehicle suspension is formed in the inner portion of the apex 54 of the curved portion 42. Further, a flange 47 is disposed on the inner side of the curved portion 42 from the portion where the notch 53 is formed to the rear end of the protector main body, and the rear end side extending portion 56 is provided at the rear end of the protector main body. Is provided.

  Further, the curved portion 42 and the front end side extending portion 43 include a rib 48 formed in the longitudinal direction of the fender protector 41, and the longitudinal rib 48 toward the inner edge and the outer edge of the protector body. A plurality of widthwise ribs 49 extending in a branch shape are arranged to increase the rigidity of the fender protector 41 and support the flow of the synthetic resin material during injection molding.

  In the fender protector 41, the ribs 48 in the longitudinal direction are formed with dimensions of 3.5 mm in height and 2.5 mm in width from the surface of the protector body. As for the ribs 49 in the width direction, the ribs 49a arranged in the vicinity of the top portion 54 of the fender protector 41 are formed with the dimensions of 3.5 mm in height and 2.5 mm in width, like the ribs 48 in the longitudinal direction. Has been.

  On the other hand, the rib 49b disposed on the rear side standing portion 55 standing in a curved shape from the rear end side of the fender protector 41 is formed wider than the rib 49a disposed near the top portion 54, and the rib 49b. The projecting height of the side edge on the top side is set to 3.5 mm. Further, the height (thickness) is gradually reduced from the side edge portion toward the rear end side of the fender protector 41, and the surface (projecting upper surface) of the rib 49b is made to be perpendicular to the vertical direction of the fender protector 41. Thus, it is formed in a tapered shape inclined at an angle of about 1/4 ° to 2 °.

  That is, by forming the rib 49b arranged in the rear side standing portion 55 in the shape as described above, for example, a mold dividing surface (parting line) when the fender protector 41 is injection-molded is extended to the front end side. When the mold 43 is set along the vertical direction of the fender protector 41, the ribs are formed on the rear side upright portion 55 when the installation portion 43 and the rear end side extension portion 56 are set on the same plane. The accompanying undercut portion can be eliminated, and a draft for easily taking out the molded product (fender protector 41) from the mold can be secured.

  Further, since the injection gate for injecting the synthetic resin material into the cavity at the time of injection molding is arranged on the rib 48 in the longitudinal direction, the trace 50 of the injection gate remains in the fender protector 41. Further, around the protector body, a plurality of fixing portions 51 and 51a for attaching the fender protector 41 to the vehicle body by a fastener such as a clip are formed. Of these fixing parts 51, 51a, the fixing part 51a formed on the step edge 46 is formed thick, and the fender protector 41 is stably attached to the vehicle body. Yes.

In the fender protector 41 having the above-described configuration, the thick end edge 45 is formed, so that the front end side extending portion 43 and the curved portion 42 can be formed without arranging many embossed portions and ribs. Stiffness and strength that sufficiently satisfy the required performance with the curved surface can be stably obtained, and appropriate flexibility can be obtained, so that favorable mounting workability can be ensured. Furthermore, since the fender protector 41 shown in FIG. 10 can simplify the arrangement of the ribs formed on the fender protector compared to the fender protector 31 of Patent Document 1, for example, in the injection molding process of the fender protector, It is also possible to simplify the die design and increase the efficiency of the work process.
JP 2001-260944 A

  In recent years, as described above, the fender protector attached to the vehicle is not only improved in rigidity and strength at a portion where deformation or breakage is likely to occur, and not only ensuring good mounting workability to the vehicle body, but also the fender protector. There is also a demand for reducing the weight of the device itself.

  However, in the fender protector 41 as shown in FIG. 10, the rib 49b disposed on the rear side standing portion 55 does not form an undercut portion as described above and must ensure a draft angle during injection molding. For the reason of injection molding, the projecting width is greatly enlarged as compared with the rib 49a arranged in the vicinity of the top portion 54, so that the formation area is increased.

  For this reason, the fender protector 41 has a problem that it is difficult to reduce the weight of the fender protector because the amount of the synthetic resin material increases because the rib 49b having a large area is formed. Further, in the fender protector 41, the rigidity of the fender protector 41 is increased more than necessary due to the wide ribs 49b, so that appropriate flexibility cannot be obtained. For this reason, there also existed a problem that the attachment workability | operativity at the time of attaching the fender protector 41 to a vehicle fell.

  Further, the fender protector 41 has a problem that the following molding defects occur when the injection molding is actually performed. That is, when the fender protector 41 is injection molded, the flow resistance of the synthetic resin material increases in the thin portion (thin region) of the protector body, so the synthetic resin material is difficult to flow, and the molten resin material injected from the injection gate is The flow path cross sections such as the ribs 48 and 49 arranged in the longitudinal direction and the width direction and the formation portions of the thick edge portions 45 preferentially flow toward a large space (passage). In particular, the ribs 49b that are formed wider have a flow passage cross section that is larger than the other ribs 48 and ribs 49a, so that the resin material can flow more quickly.

  For this reason, as shown in FIG. 4B, for example, the resin material injected from the injection gate flows from the ribs 48 in the longitudinal direction to the ribs 49b formed wide, and further from these ribs 48 and 49b. It flows in thin-walled areas. At this time, the synthetic resin material slowly flows into the thin region of the protector body as indicated by the phantom line 57, but the synthetic resin material quickly flows into the wide rib 49b. The synthetic resin material is filled by flowing from the rib 49b into the thick end edge 45 having a low flow resistance before the inside of the thin region is filled.

  As described above, if the thick edge 45 is filled before the synthetic resin material is filled in the thin area, the air in the thin area is surrounded by the synthetic resin material, and the gas cannot be vented. . For this reason, in the thin area surrounded by the ribs 48 and 49b and the thick edge 45, air remains in the interior, and the air pool 58 is likely to be generated. As a result, the molded product as shown in FIG. There is a problem that a molding defect 52 called air tight occurs that impairs the appearance of the film.

  The present invention has been made in view of the above-described conventional problems, and a specific object thereof is that it does not have molding defects such as air tight generated at the time of injection molding, is lightweight, and increases the rigidity and strength of a required part. It is another object of the present invention to provide a fender protector having moderate flexibility and excellent mounting workability to a vehicle.

  In order to achieve the above object, the fender protector provided by the present invention has, as a basic configuration, a front standing part standing on the front end side to a rear standing part standing on the rear end side through the top part. A first rib extending in the longitudinal direction of the protector body, and one side edge or left and right sides of the protector body from the first rib. A fender protector that is attached to a wheel house of a vehicle and protects a vehicle body, the fender protector having at least one second rib extending toward both side edges, the front rib and the rear At least one of the standing portions, the front edge side edge portion of the second rib or the rear edge side edge portion of the rear rib portion on the first rib. for Toki angle θ is one which the most important feature to become disposed in the tilted or curved toward the top so that an acute angle.

  In the fender protector according to the present invention, the side edge of the second rib on the top side is inclined or curved toward the top so that an angle θ ′ branched with respect to the first rib is an acute angle. In this case, the second rib is preferably formed so that the angle θ is smaller than the angle θ ′.

  Further, in the fender protector according to the present invention, the second rib is arranged so that a cross-sectional area on the distal end side of the second rib is smaller than a cross-sectional area on the base end side. The rib is preferably formed in a tapered shape so that the protruding height of the second rib gradually decreases toward the tip.

  Furthermore, in the fender protector according to the present invention, a thick edge portion formed thicker than the protector body is formed on a part of one side edge of the protector body, and the second rib is It is preferable that the first rib is disposed toward the thick edge portion.

  In the fender protector according to the present invention, if the second rib disposed on at least one of the front standing portion and the rear standing portion is, for example, the second rib disposed on the front standing portion, the front end of the front standing portion. If the second rib is inclined or curved toward the top so that the angle θ for branching the side edge with respect to the first rib is an acute angle, and the second rib is arranged on the rear standing portion, The rear end side edge is inclined or curved toward the top so that the angle θ at which the side edge is branched with respect to the first rib is an acute angle.

  That is, the fender protector according to the present invention has a side edge on the front end side or the rear end side of the fender protector (that is, a side edge on the top side of the protector main body) in the second rib arranged in the front standing part and the rear standing part. Is inclined or curved toward the top so as to branch at an acute angle with respect to the first rib. Thereby, when performing injection molding of the fender protector, for example, as in the conventional fender protector 41 shown in FIG. 10, even if the protruding width of the rib 49 b disposed on the rear side standing portion 55 is not widened, When the molded product (fender protector) is taken out of the mold, the mold (upper mold) is moved along the side edge of the second rib provided to be inclined or curved, thereby removing the mold from the mold of the fender protector. The mold can be smoothly opened without being caught on the two ribs, and the fender protector can be easily taken out.

  Further, in the present invention, since the shape of the second rib itself arranged in the front standing part and the rear standing part can be made smaller than that of the conventional fender protector 41, the amount of synthetic resin material used can be reduced and the fender can be reduced. It is possible to reduce the weight and cost of the protector.

  Furthermore, by reducing the shape of the second rib itself, it is possible to effectively prevent the occurrence of airtight molding defects in the fender protector. That is, in the conventional fender protector, since the second rib formed on the upright portion is formed wide, the synthetic resin material flows as shown in FIG. 4B during the injection molding of the fender protector. Molding defects such as air tight occurred.

  On the other hand, the fender protector of the present invention has a smaller shape of the second rib formed on the upright portion than the conventional one, so that when the fender protector is injection-molded, it flows into the formation space of the second rib. Since the flow rate of the synthetic resin material can be kept lower than before, the synthetic resin material can be gently poured from the first rib toward the side edge of the fender protector in the thin region. Thereby, since air is not easily generated by smoothly degassing the thin-walled region, air tightness can be prevented from occurring in the fender protector.

  In the fender protector of the present invention, by providing the first rib and the second rib as described above, the fender protector is reinforced and the rigidity and strength are effectively improved. Since the flow of the synthetic resin material is supported by the formation space of the first rib and the second rib, occurrence of a short shot can be prevented.

  In the fender protector of the present invention, the side edge on the top side of the second rib is inclined or curved toward the top so as to branch at an acute angle with respect to the first rib. Alternatively, the angle θ for branching the side edge on the rear end side is made smaller than the angle θ ′ for branching the top side edge. Thereby, a 2nd rib can be formed in a smaller shape and it becomes possible to achieve further weight reduction of a fender protector. Moreover, since it becomes possible to further reduce the flow rate of the synthetic resin material flowing into the formation space of the second rib during the injection molding of the fender protector, it is possible to effectively prevent the air tight from being generated in the fender protector.

  Furthermore, in the present invention, the cross-sectional area on the tip end side of the second rib is formed smaller than the cross-sectional area on the base end side, for example, as described above, the angle θ is larger than the angle θ ′. Synthetic resin material that flows into the formation space of the second rib at the time of injection molding of the fender protector by making it smaller or by forming the taper shape so that the protruding height of the second rib gradually decreases toward the tip. Since the flow rate of the air can be further reduced as it approaches the tip, the occurrence of air tightness can be more effectively prevented.

  Furthermore, in the fender protector according to the present invention, a thick end edge portion formed thicker than the protector body is formed on a part of the side edge portion of the protector body, and the second rib is formed. By being arranged from the first rib toward the thick edge portion, sufficient rigidity and strength can be stably obtained at a required portion. At the same time, moderate flexibility is also obtained, so that it is possible to ensure good mounting workability when mounting the fender protector to the vehicle body.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to the embodiments described below, and various modifications are possible as long as they have substantially the same configuration as the present invention and have the same effects. Is possible.

  For example, the fender protector described in each of the following embodiments is a molded integrated product produced by one injection molding, but the present invention is not limited to this, and the fender protector assembles a plurality of molded parts. It may be a divided product constituted by: In the present invention, the shape and size of the first rib and the second rib formed on the fender protector, the number of the second ribs, and the like are not limited to the following embodiments, and are arbitrarily set. Is possible.

  FIG. 1 is a perspective view schematically showing the rear side of the fender protector according to the first embodiment from obliquely above, and FIG. 2 is a perspective view schematically showing the front side of the fender protector obliquely from above. is there. Moreover, FIG. 3 is the perspective view which expanded and showed the 2nd rib formed in the rear standing part of the same fender protector.

  In the following description, when the fender protector is attached to the automobile, the direction of the traveling direction of the automobile is assumed to be the front, and the backward direction is assumed to be the rear. Also, the side facing the engine room of the fender protector is the inside, and the side facing the outside is the outside. Furthermore, the top side of the fender protector is set to the upper side and the direction on the opposite side is set to the lower side along the die cutting direction when the fender protector is injection-molded.

  The fender protector 1 of the present embodiment shown in FIGS. 1 and 2 is an integrally molded product obtained by injection molding of an olefinic thermoplastic resin such as polypropylene or polyethylene, and is attached to the inside of a wheel house of an automobile fender panel. It is a member that covers the upper part of the tire. This fender protector 1 includes a curved portion 2 that is continuously curved in a substantially inverted U shape, a substantially fan-shaped front end side extended portion 3 that is bent and extended at the front end of the curved portion 2, and a curved portion 2. And a rear end side extending portion 4 extending from the rear end.

  The curved portion 2 includes a front standing portion 5 standing on the front end side, a rear standing portion 6 standing on the rear end side, and a top portion 7 connecting the front standing portion 5 and the rear standing portion 6. It is configured. In the first embodiment, the front upright portion 5 and the rear upright portion 6 indicate regions where the inclination of the curved surface (outer surface) of the curved portion 2 with respect to the vertical direction of the fender protector 1 is about 60 ° or less. .

  Further, the curved portion 2 has a protector body 15 formed in a thin wall having a thickness of 0.8 mm or more and 1.5 mm or less, preferably about 1.0 mm, so that weight reduction is achieved. If the thickness of the protector body 15 is less than 0.8 mm, the thickness of the protector body 15 may be too thin, making it difficult to obtain the required rigidity and strength. If it exceeds, the weight of the fender protector will increase significantly, and the cost will increase due to an increase in the amount of resin.

  The curved portion 2 and the front end side extending portion 3 are provided with an end edge portion 8 having a step along the outer side edge thereof, and a part of the end edge portion 8 in the curved portion 2 and the front end side. The substantially arcuate edge 8 in the extended portion 3 is formed as a thick edge 9 having a thickness of 2.0 mm to 3.0 mm, preferably about 2.5 mm. By forming the thick edge portion 9 having such a thickness, the flexibility of the fender protector 1 is maintained, the rigidity of the required portion of the bending portion 2 and the front end side extension portion 3 and Strength can be improved effectively. The edge portions 8 other than the thick edge portion 9 have the same thickness as the protector body 15.

  Further, the bending portion 2 is formed with a notch 10 for inserting a suspension of an automobile at a portion inside the top portion, and the notch 10 is provided at an inner edge of the bending portion 2. A flange 11 is formed from the part to the extending portion 4 on the rear end side. Further, three traces 13 of the injection gate when the fender protector 1 is injection-molded are formed on the outer peripheral surface of the curved portion 2. If the appearance and function of the fender protector 1 are impaired, the trace 13 of the injection gate can be removed by performing a finishing process or the like in a subsequent process.

  Furthermore, a plurality of fixing portions 12 for fixing the fender protector 1 to the vehicle body of the automobile by a fastener such as a clip are provided on the top portion 7, the thick end edge portion 9, and the front end side extending portion 3 of the bending portion 2. Is formed at a predetermined location so that a stable mounting state of the fender protector 1 can be secured.

  In the first embodiment, the flange 11, the front end side extending portion 3, and the rear end side extending portion 4 of the curved portion 2 are all arranged on the inner side of the vehicle, and other members of the vehicle (fender panel or the like). There is a space in the relationship. Therefore, the flange 11, the front end side extending portion 3, and the rear end side extending portion 4 can be arranged in a direction intersecting with the curved surface of the bending portion 2.

  On the other hand, the edge 8 that is disposed outside the vehicle and is easily accessible to the human eye must be firmly attached to the vehicle body without causing a gap in relation to the fender panel of the automobile. For this reason, a thick edge 9 having a thickness of 2.0 mm or more and 3.0 mm or less as described above is formed on the edge 8, and the thick edge 9 is a vehicle body. The fixing portion 12 is appropriately formed. Thereby, when the fender protector 1 is attached to the vehicle body, a more stable attachment state is ensured.

  The fixing portion 12 is formed by directly drilling a mounting hole at a predetermined portion such as the top portion 7 or the thick end edge portion 9. It is also possible to form a fixing portion with respect to the vehicle body by separately forming a piece-like attachment portion and drilling an attachment hole in the small piece attachment portion.

  In the fender protector 1 of the first embodiment, on the outer peripheral surface (surface) of the curved portion 2, a protrusion that extends while having a bent portion in the longitudinal direction of the protector body 15 so as to bypass the notch 10. The first rib 21 and a plurality of second ribs 22 extending from the first rib 21 toward the end edge portion 8 are formed. The first rib 21 passes through the traces 13 of the two injection gates, and is also applied to the traces 13 of the injection gate formed behind the cutout 10 and closer to the inside of the protector body 15. A third rib 23 branched from the first rib 21 is formed so that the flow paths communicate with each other.

  Thereby, at the time of injection molding of the fender protector 1, the flow of the synthetic resin material is supported by the first rib 21, the second rib 22, and the third rib 23 which are the flow paths of the resin material, and the inside of the cavity of the synthetic resin material Can be stably filled. Furthermore, the 1st rib 21 is extended from the front end of the curved part 2 on the upper surface of the front end side extension part 3, and supports the flow of the synthetic resin material to the front end side extension part 3 at the time of injection molding. In the present invention, the second rib may be formed on the front end side extending portion 3 or the first rib 21 and the second rib 22 may be formed on the rear end side extending portion 4 as necessary. Is possible.

  In the first embodiment, the first rib 21 and the third rib 23 are formed to have a substantially rectangular shape in cross section or a substantially mountain shape in which the root portion is widened. The size of the cross section of the first rib 21 and the third rib 23 is set such that the height from the surface of the protector body is 2.5 mm to 3.5 mm, preferably about 3.0 mm, and the width ( In particular, the width at the position where the height of the rib is half is set to 4.5 mm.

  Thus, when the height of the first rib 21 and the third rib 23 is 2.5 mm or more and the width is 4.5 mm, the rigidity of the fender protector 1 can be reliably improved, and the fender protector is further improved. It is possible to obtain good flow support performance of the synthetic resin material when 1 is injection molded. Moreover, if the height of the 1st rib 21 and the 3rd rib 23 is 3.5 mm or less, the significant cost increase by the increase in the usage-amount of a synthetic resin will not be caused.

  The second rib 22 extends from the first rib 21 toward the end edge 8 or the inner end edge (or the flange 11), but is in contact with the end edge 8 formed on the outer side. In other words, a space 14 is provided between the second rib 22 and the end edge 8. In particular, the second rib 22 that extends toward the thick end edge 9 is provided with a gap 14 of 20 mm or more and 30 mm or less between the thick rib end edge 9. By providing such an interval 14, not only can air tightness be effectively prevented as will be described later, but the flexibility of the fender protector 1 can be appropriately obtained. Can be improved. In the present invention, the interval 14 between the second rib 22 and the end edge portion 8 is not necessarily provided. For example, in order to ensure rigidity and strength according to the width and height of the rib. It is also possible to connect the second rib 22 directly to the edge 8.

  In the second rib 22, the two second ribs 22 a formed on the rear end side of the rear standing part 6 of the curved portion 2 have a height from the surface of the protector body of 2.5 mm to 3.5 mm. , Preferably about 3.0 mm. Further, as shown in FIG. 3, these second ribs 22 a have a rear end side edge 24 branched at an angle θ that is an acute angle with respect to the first rib 21, and on the top side. The side edge portion 25 is inclined toward the top portion 7 so as to branch at an angle θ ′ that is an acute angle with respect to the first rib 21.

  In addition, in this 2nd rib 22a, the base end part 26 used as the part branched from the 1st rib 21 may be formed so that it may incline or curve from the 1st rib 21, or may be formed so that it may cross substantially orthogonally. It is also possible. Therefore, for example, as shown in FIG. 3, when the base end portion 26 of the second rib 22 a is formed in a direction substantially orthogonal to the first rib 21, the second rib 22 a The angle θ and the angle θ ′ with respect to the first rib 21 refer to angles at which the extension lines of the side edge portions 24 and 25 of the second rib 22 a are inclined with respect to the first rib 21. In the case where the second rib 22a is formed to be curved, the angle θ and the angle θ ′ are such that the tangent at the intermediate portion between the side edges 24 and 25 of the second rib 22a is in the first rib 21. It shall refer to the angle of inclination.

  In the first embodiment, since the second rib 22a is formed to be inclined as described above, when the fender protector 1 is injection-molded and removed from the mold, the mold (upper mold) is removed from the second rib. The mold 22 can be smoothly pushed upward toward the upper side of the fender protector 1 while being moved along the inclined rear end side edge 24 of the 22 so that the mold is caught by the rear end side edge 24 of the second rib 22a. The fender protector 1 molded into a predetermined shape can be easily removed from the mold.

  In particular, in the first embodiment, the second rib 22a provided on the rear upright portion 6 sets the size of the angle θ at the side edge portion 24 on the rear end side to 20 ° or more and 50 ° or less, and The angle θ ′ at the side edge 25 on the top side is set to 40 ° or more and 70 ° or less, and the angle θ on the rear end side is made smaller than the angle θ ′ on the top side. Yes. Therefore, the second rib 22 a is formed so that the protruding width of the rib becomes narrower toward the distal end portion 27. In the present invention, it is possible to form the second rib 22a by making the angle θ ′ larger than 90 °.

  Thus, by forming the 2nd rib 22a of the rear standing part 6 in a taper, it can prevent effectively that the molding defect of an air tight arises at the time of the injection molding of the fender protector 1. FIG. That is, conventionally, as described above with reference to FIG. 4B, the rib 49b has a wide projecting width, so that the synthetic resin material is thick on the rib 49b during the injection molding of the fender protector. It quickly flows to the side edge 45 side. As a result, there is a problem that air in the thin region is surrounded by the synthetic resin material and air tightness is generated.

  On the other hand, in the fender protector 1 of the first embodiment, as shown in FIG. 4A, the second rib 22a is tapered, and the cross-sectional area of the second rib 22a on the front end portion 27 side is increased. It is smaller than the cross-sectional area on the base end portion 26 side. Thereby, at the time of injection molding of the fender protector 1, the flow of the synthetic resin material is supported by the second rib 22a, but the flow rate of the synthetic resin material flowing in the formation space of the second rib is set to the tip portion 27 of the second rib 22a. The smaller it is, the smaller it can be. Furthermore, in the first embodiment, since the gap 14 is provided between the second rib 22a and the thick edge 9, the synthetic resin that flows from the tip of the second rib 22 a to the thick edge 9. The flow rate of the material can be further reduced. As a result, it is possible to gradually fill the resin material from the first rib side toward the side edge portion by making the flow 28 of the synthetic resin material gentle. Therefore, the air in the thin wall region is not surrounded by the synthetic resin material as in the prior art, and gas accumulation does not occur, and air tightness can be effectively prevented from occurring in the fender protector.

  Further, in the second rib 22, the second rib 22 b formed on the top portion 7 of the curved portion 2 is formed as a protrusion as shown in FIG. 5, and is on the base end side of the second rib 22 b. As with the first rib 21 and the third rib 23, the size of the cross-section at the height from the surface of the protector body is set to 2.5 mm to 3.5 mm, preferably about 3.0 mm. The projecting width is set to 4.5 mm. On the other hand, on the tip end side of the second rib 22b, the second rib 22b is formed in a tapered shape so that the protruding height gradually decreases toward the tip. Thereby, at the time of injection molding of the fender protector 1, the flow rate of the synthetic resin material flowing in the formation space of the second rib 22b can be reduced as it approaches the tip, thereby preventing gas accumulation in the thin region. In addition, air tightness can be effectively prevented from occurring at the top portion 7 of the curved portion 2.

  In the first embodiment, as shown in FIG. 2, the second rib 22c formed on the front upright portion 5 of the bending portion 2 is formed from the first rib 21 to the outside of the protector body 15 and It extends toward the inner side edges (both left and right side edges) and is formed wide in the longitudinal direction of the protector body 15, and the height of the side edge on the top side of the second rib 22c is 2.5 mm. It is set to 3.5 mm or less, preferably about 3.0 mm. Further, the second rib 22 c gradually decreases in height from the side edge on the top side toward the front end side of the fender protector 1, and the rib surface (projecting upper surface) is 1/2 in the vertical direction of the fender protector 1. It is formed in a tapered shape inclined at an angle of about 4 ° to 2 °. Accordingly, the second rib 22c closer to the front end side of the fender protector 1 is formed so that the width dimension in the longitudinal direction becomes larger.

  In the present invention, the second rib 22c formed on the front standing part 5 of the curved part 2 is also formed in the same shape as the second rib 22a formed on the rear standing part 6 of the first embodiment. That is, the rib side edge on the front end side of the protector body branches at an acute angle with respect to the first rib 21, and the rib side edge on the top side of the protector body also branches at an acute angle with respect to the first rib 21. It is possible to form in the shape curved toward the top part 7. As a result, like the second rib 22a formed on the rear upright portion 6, the second rib 22c is tapered to make the cross-sectional area on the rib tip end side smaller than the cross-sectional area on the base end side. it can. For this reason, at the time of injection molding of the fender protector, it is possible to effectively prevent the air tightness from being generated in the fender protector by reducing the flow rate of the synthetic resin material toward the rib tip, and when performing die cutting The mold is not caught by the second rib 22c formed on the front upright portion 5.

  In the first embodiment, the first rib 21, the second rib 22, and the third rib 23 are all formed on the outer peripheral surface (surface) of the protector body 15, but the present invention is limited to this. For example, it may be formed on the inner peripheral surface (back surface) of the protector body 15 or may be formed on both the outer peripheral surface and the inner peripheral surface of the protector body 15.

  The fender protector 1 of the first embodiment having the above-described configuration is an olefin-based thermoplastic resin from an injection gate into a cavity formed between a clamped upper mold and a lower mold using an injection molding method. It can be easily manufactured by injecting. At this time, the flow of the synthetic resin material injected from the injection gate (position where the trace 13 of the injection gate is formed) is supported by the space (flow path) in which the first rib 21 to the third rib 23 are formed. The Therefore, the synthetic resin material flows to the second rib 22 via the first rib 21 and the third rib 23, and further stably in the thin region of the protector body 15 from the first rib 21 side toward the side edge portion 8. Since it is filled, it is possible to effectively prevent short shots from occurring in the fender protector 1.

  In particular, in the fender protector 1 according to the first embodiment, the second rib 22a formed on the rear upright portion 6 of the bending portion 2 and the second rib 22b formed on the top portion 7 are arranged on the rib tip portion 27 side as described above. Is made smaller than the base end portion 26 side. For this reason, the flow resistance of the synthetic resin material increases toward the rib tip at the time of injection molding, and the flow rate of the resin material decreases. As a result, as described above, in the thin region, the resin material can be gradually filled from the first rib 21 side toward the end edge portion 8 with the flow 28 of the synthetic resin material gently. Further, air tightness can be effectively prevented from occurring in the fender protector 1.

  Further, as described above, when the synthetic resin material is filled in the mold cavity and cooled and solidified, when the mold is opened and the molded product is taken out, the rear standing portion of the fender protector 1 has the second raised portion. Since the rib 22a is formed and the second rib 22c is formed on the front standing portion, the molded product can be easily taken out without being caught by the second rib 22a or the second rib 22c. It becomes possible.

  And the fender protector 1 of the present Example 1 obtained by the injection molding as described above maintains suitable flexibility by the first rib 21 to the third rib 23 and the thick edge 9. However, since it is effectively reinforced, it has excellent rigidity and strength. Therefore, the fender protector 1 is a high-quality fender protector that is excellent in attachment workability to an automobile and is not easily damaged or deformed when the automobile is running. Moreover, since the shape of the second rib 22a formed on the rear upright portion 6 of the fender protector 1 of the first embodiment is smaller than that of the conventional fender protector, the rigidity of the fender protector does not become higher than necessary. As a result, the amount of the synthetic resin material used can be reduced and the fender protector can be reduced in weight and cost.

  Next, a fender protector according to the second embodiment of the present invention will be described. Here, FIG. 6 is an enlarged perspective view showing the second rib formed on the rear standing part of the fender protector of the second embodiment.

  The fender protector 1 ′ of the second embodiment is different from the fender protector 1 of the first embodiment in the shape of the second rib 22 a ′ formed on the rear upright portion 6. That is, as shown in FIG. 6, the second rib 22a ′ of the second embodiment is formed with the tip 27 side tapered so that the protruding height gradually decreases toward the rib tip 27. Yes. In the present invention, the taper shape of the second rib 22a ′ is, as necessary, for example, as shown in FIG. 6 in a region of about ３ on the tip 27 side in the rib length of the second rib 22a ′. It may be formed, may be formed in a region closer to the tip 27 than 1/2 of the rib length, or may be formed over the entire rib length. In the fender protector 1 ′ of the second embodiment, the configuration other than the shape of the second rib 22 a ′ is basically the same as that of the fender protector 1 of the first embodiment.

  As in the second embodiment, the tip end 27 side of the second rib 22a ′ is formed in a tapered shape, so that the cross-sectional area of the second rib 22a ′ on the tip end side is the second rib 22a of the first embodiment. (See FIG. 3). Thereby, at the time of injection molding of the fender protector 1 ′, the flow rate of the synthetic resin material flowing in the formation space of the second rib 22 a ′ can be further reduced as it approaches the distal end portion 27. Therefore, since it becomes possible to gradually fill the synthetic resin material from the first rib 21 side toward the side edge portion 8 with a gentle flow, air tightness is more reliably generated in the fender protector 1 ′. Can be prevented.

  Then, the fender protector which concerns on Example 3 of this invention is demonstrated. Here, FIG. 7 is an enlarged perspective view showing the second rib formed on the rear standing portion of the fender protector of the third embodiment.

  The fender protector 1 ″ of the third embodiment is also different from the fender protector 1 of the first embodiment in the shape of the second rib 22a ″ formed on the rear upright portion 6. That is, as shown in FIG. 7, the second rib 22a ″ of the third embodiment is provided on the side of the rear end side of the protector body so that the protruding height of the rib gradually decreases toward the rear end side of the protector body 15. The edge 24 ″ side is formed in a taper shape. In the fender protector 1 ″ of the third embodiment, the configuration other than the shape of the second rib 22a ″ is basically the same as that of the fender protector 1 of the first embodiment.

  By forming the side edge 24 ″ side of the second rib 22a ″ in a tapered manner as in the third embodiment, the rear standing portion 6 can be eliminated from the undercut portion, and the second rib 22a ″ can also be removed. It becomes possible to form a suitable draft angle. Therefore, when the synthetic resin material is solidified in the injection molding process of the fender protector 1 ″, the mold is opened and the molded product (fender protector 1 ″) is taken out. The fender protector 1 "can be taken out more easily by reliably preventing the upper mold of the mold from being caught by the second rib 22a".

  In the present invention, any one of the first to third embodiments as described above is also applied to the second rib formed on the front standing portion of the fender protector and the other second rib formed on the rear standing portion. The rib which has the same shape as the said 2nd rib of this invention formed in this can be formed. Thereby, it can prevent more reliably that air tightness generate | occur | produces in a fender protector, and when taking out a die, a fender protector can be taken out more easily from a metal mold | die.

It is the perspective view which showed typically the back side of the fender protector which concerns on Example 1 from diagonally upward. It is the perspective view which showed typically the front side of the same fender protector from diagonally upward. It is the perspective view which expanded and showed the 2nd rib formed in the rear standing part of the same fender protector. (A) is explanatory drawing which illustrates typically the flow of the synthetic resin material at the time of injection-molding the fender protector of this invention, (b) is the synthetic resin material at the time of injection-molding the conventional fender protector. It is explanatory drawing which illustrates the flow of this. It is the perspective view which expanded and showed the 2nd rib formed in the top part of the fender protector concerning Example 1. It is the perspective view which expanded and showed the 2nd rib formed in the rear standing part of the fender protector which concerns on Example 2. FIG. It is the perspective view which expanded and showed the 2nd rib formed in the rear standing part of the fender protector which concerns on Example 3. FIG. It is a perspective view which shows an example of the conventional fender protector. It is a top view of the fender protector. It is a perspective view which shows an example of the conventional fender protector which improved the rigidity of the site | part which tends to produce a deformation | transformation and a failure | damage effectively.

Explanation of symbols

1, 1 ′, 1 ″ Fender protector 2 Curved portion 3 Front end side extended portion 4 Rear end side extended portion 5 Front standing portion 6 Rear standing portion 7 Top portion 8 Edge portion 9 Thick edge portion 10 Notch 11 Flange 12 Fixed portion 13 Trace of injection gate 14 Interval 15 Protector body 21 1st rib 22 2nd rib 22a 2nd rib 22a ′, 22a ″ of rear standing portion 2nd rib 22b of rear standing portion 2nd rib 22c of top portion Part 2nd rib 23 3rd rib 24, 24 ″ Side edge part 25 on the rear end side Edge part 26 on the top side 26 Base end part 27 Tip part 28 Flow of resin material 31 Fender protector 32 Curved part 33 Extension part 34 Embossed portion 35 Injection gate 36 Rib 38, 38a Mounting portion 41 Fender protector 42 Bending portion 43 Extending portion 44 Side wall portion 45 Thick edge portion 46 Step edge portion 47 Flange 48 Rib in longitudinal direction 49 Rib in width direction 50 Trace of injection gate 51, 51a Fixing part 52 Air tight 53 Notch 54 Top part 55 Rear side standing part 56 Rear end side extension part 57 Flow of resin material 58 Air accumulation

Claims (6)

Thin-walled protector that is continuously curved in a substantially inverted U shape from the front standing part (5) erected on the front end side to the rear standing part (6) erected on the rear end side via the top part (7) On the peripheral surface of the main body (15), a first rib (21) extending in the longitudinal direction of the protector main body (15), and one side edge or left and right sides of the protector main body (15) from the first rib (21) A fender protector (1,1 ', 1) that is mounted in a vehicle wheelhouse and protects the vehicle body, having at least one second rib (22a, 22a', 22a '') extending toward both side edges '')
The second ribs (22a, 22a ′, 22a ″) are formed on at least one of the front standing part (5) and the rear standing part (6). , 22a '') the front edge portion of the front standing portion (5) or the rear edge portion (24, 24 '') of the rear standing portion (6). A fender protector, wherein the fender protector is arranged so as to be inclined or curved toward the top (7) so that an angle θ branched with respect to the rib (21) becomes an acute angle.   The angle θ ′ at which the side edge (25) on the top (7) side of the second rib (22a, 22a ′, 22a ″) branches from the first rib (21) is an acute angle. The fender protector according to claim 1, wherein the fender protector is inclined or curved toward the top (7).   The fender protector according to claim 2, wherein the second rib (22a, 22a ', 22a' ') is formed by making the angle θ smaller than the angle θ ′.   The second rib (22a, 22a ', 22a' ') has a cross-sectional area on the distal end (27) side of the second rib (22a, 22a', 22a '') that is cut off on the proximal end (26) side. The fender protector according to any one of claims 1 to 3, wherein the fender protector is arranged so as to be smaller than an area.   The second ribs (22a, 22a ′, 22a ″) are tapered so that the projecting height of the second ribs (22a, 22a ′, 22a ″) gradually decreases toward the tip (27). The fender protector according to any one of claims 1 to 4, wherein the fender protector is formed. A thick edge (9) formed thicker than the protector body (15) is formed on a part of one side edge of the protector body (15),
The second ribs (22a, 22a ′, 22a ″) are arranged from the first rib (21) toward the thick edge (9).
The fender protector according to any one of claims 1 to 5.

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