JP2007223397A - Protector panel for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protector panel for a vehicle such as a fender panel having a favorable flexibility, etc. rigidity and strength of a required portion of which are effectively improved without causing molding failure such as short shot and airtight in injection molding. <P>SOLUTION: This synthetic resin made protector panel for the vehicle furnished with a first rib 11 of a projected line arranged along a thick end edge part 8 and a plurality of second ribs 12 extensively provided toward the thick end edge part 8 from the first rib 11 on one surface of a thin plate type panel main body having the thick end edge part 8 on at least a part of an end edge and mounted on a vehicle body for vehicle protection, etc. has a third rib 13 extensively provided from either one of the thick end edge part 8, the first rib 11 and the second ribs 12 toward a region surrounded by the thick end edge part 8, the first rib 11 and the second ribs 12 on the one surface of the panel main body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a protector panel for a vehicle made of a synthetic resin such as a fender protector or an undercover that is attached to an automobile to protect the vehicle body, in particular, the rigidity and strength of a portion that is easily damaged or deformed, and The present invention relates to a protector panel for a vehicle that has good mounting workability to a vehicle and that does not cause molding defects such as air tight and short shot during injection molding.

  In general, a fender protector is attached to the inside of a wheel house that covers the upper part of a tire, for example, in order to protect the vehicle body and other components from the splash of muddy water and pebbles jumping up when driving. An under cover is attached to the bottom of the engine room. Such protector panels, such as a fender protector and an under cover, are produced in a desired shape by injection molding of synthetic resin. For example, the fender protector is formed in an arch shape so as to cover a part of the tire from above, and is formed in a thin plate shape of about 0.8 to 1.3 mm in order to reduce the weight.

  The fender protector is required to secure a certain degree of rigidity and strength for the function of protecting a fender panel and the like while maintaining a predetermined shape. However, when the fender protector is formed into a thin wall for weight reduction, there is a problem that its rigidity is lowered. Further, at the time of injection molding, the cross section of the resin flow path is inevitably narrow in the mold cavity, and the flow resistance of the synthetic resin is increased. For this reason, the synthetic resin is not completely filled into the cavity but is cooled and solidified, and there is a problem that a molding defect called short shot (filling defect) is likely to occur.

  Therefore, conventionally, in order to solve the above-described problems, ribs of protrusions are formed along the longitudinal direction on one surface of the fender protector. By forming such ribs, the fender protector is reinforced to improve rigidity, and at the time of injection molding, the portion (space) where the ribs are formed serves as a flow path to assist the flow of the synthetic resin. For this reason, the filling of the synthetic resin is performed stably, and the occurrence of short shots is prevented.

  An example of a fender protector in which such ribs are formed is described in Japanese Patent Laid-Open No. 2001-260944 (Patent Document 1). For example, as shown in FIGS. 4 and 5, the fender protector described in Patent Document 1 has a thin plate shape of 0.8 to 1.3 mm and has an arched shape. Ribs 36 are formed along the longitudinal direction. The ribs 36 are provided so as to pass over the synthetic resin injection gate 35 when the fender protector 31 is injection-molded.

  In the fender protector 31 described in Patent Document 1, since the ribs 36 are formed on the front surface side of the fender protector 31, for example, compared with the case where the ribs are formed on the back surface side, the fender protector 31 is formed in the mold during injection molding. The capacity of the flow path for flowing the synthetic resin is increased to improve the performance of supporting the flow of the synthetic resin. 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, it is difficult for the tire and the rib 36 to interfere with each other. Yes.

  In addition, as shown in FIG. 5, the fender protector 31 of Patent Document 1 has a mounting portion 38, which is thicker than the protector main body, at a predetermined position on the edge of the fender protector 31 in order to stably attach the vehicle to the vehicle. 38a is formed, and the mounting rigidity to the vehicle is ensured. Further, ribs 36 that support the flow of the synthetic resin are continuously formed on the three attachment portions 38a. Thereby, the synthetic resin can be surely 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. 4, the fender protector 31 includes an arch-shaped curved portion 32 and a flat-shaped extended portion 33 that is bent and extended to the front end of the curved portion 32. However, when such a fender protector 31 is attached to the vehicle, the extending portion 33 is not only applied with a load as an attachment portion, but also peeled off from the fender panel by the action of air flowing near the ground when the vehicle travels. Since the force is applied to the deformation, deformation easily occurs. Accordingly, the extension portion 33 of the fender protector 31 is required to have higher rigidity and strength than other portions in order to stably maintain the attachment state to the fender panel.

  Further, the curved surface of the curved portion 32 (particularly the curved surface on the rear side of the vehicle body) easily receives wind pressure from the tire when the vehicle travels, and further collides with pebbles and the like that are flipped up by the tire. Therefore, it is necessary to increase the rigidity and strength of the curved portion 32 in order to prevent bending due to wind pressure and damage due to stepping stones. For this reason, in the bending part 32 and the extension part 33 as described above, for example, an embossed part 34 is provided, and further, the arrangement of the ribs 36 is made complicated or densely arranged. However, if too many embossed portions 34 and ribs 36 are provided in order to increase the rigidity and strength of the fender protector 31, the flexibility of the fender protector 31 is reduced, and the fender protector 31 is attached to the vehicle. Detrimental effects such as poor mounting workability occur. Therefore, it has been difficult to simultaneously improve the rigidity and strength and the mounting workability.

  Therefore, in recent years, for example, a structure of a fender protector 41 as shown in FIG. 6 is used to effectively improve rigidity and strength at 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. 6, an arch-shaped curved portion 42, a substantially fan-shaped extended portion 43, and a side wall portion disposed at a right angle to the extended portion 43 on the front inner side of the curved portion 42. 44 constitutes a panel body. In FIG. 6, 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 the inside, and the side facing the outside is the outside.

  In the fender protector 41, a step edge portion 46 having a step is provided on the outer edge of the curved portion 42 and the extending portion 43, and a part of the step edge portion 46 and the extending portion in the curved portion 42 are provided. 43 step edge portions 46 are formed as thick edge portions 45 that are thicker than the protector body. In this case, the thickness of the thin plate-like portion of the protector body is, for example, about 0.8 mm to 1.3 mm, whereas the thickness of the thick edge 45 is set to about 2.5 mm. . A notch 53 into which a vehicle suspension (not shown) is inserted is formed in a portion inside the top of the curved portion 42. Further, a flange 47 is disposed on the inner side of the bending portion 42 from the portion where the notch 53 is formed to the rear end.

  Further, the curved portion 42 and the extending portion 43 include a rib 48 formed in the longitudinal direction of the fender protector 41 and a branch shape extending from the longitudinal rib 48 toward the inner and outer edges of the protector body. A plurality of ribs 49 in the width direction are provided. The ribs 48 and 49 arranged in the longitudinal direction and the width direction are formed with dimensions of a height of 3.5 mm and a width of 2.5 mm from the surface of the protector body, and the rigidity of the fender protector 41 is increased. In addition to enhancing, it supports the flow of synthetic resin during injection molding. Furthermore, since the injection gate of the synthetic resin is arranged on the rib 48 in the longitudinal direction, the trace 50 of the injection gate remains, and the protector body is surrounded by a fastener such as a clip. A plurality of fixing portions 51 and 51a fixed to a fender panel (not shown) are formed. Of these fixing portions 51 and 51a, the fixing portion 51a formed on the step edge portion 46 is formed to be thick and stabilizes the attachment state to the fender panel.

The fender protector 41 shown in FIG. 6 having the above-described configuration sufficiently satisfies the required performance with the curved surface of the extended portion 43 and the curved portion 42 by forming the thick edge 45. As a result, it is possible to stably obtain a sufficient rigidity and strength, maintain a suitable flexibility of the fender protector 41, and obtain a good mounting workability. Furthermore, in the fender protector 41 of FIG. 6, since the arrangement of the ribs formed on the fender protector can be simplified as compared with, for example, the fender protector of Patent Document 1, a mold is used in the injection molding process of the fender protector. It is also possible to simplify the design and improve the efficiency of the work process.
JP 2001-260944 A

  However, in the fender protector 41 as shown in FIG. 6, since the thick edge portion 45 is provided in order to effectively improve the rigidity, the following molding defects occur during injection molding. was there.

  That is, when performing the injection molding of the fender protector 41, the synthetic resin is difficult to flow in the thin portion (region) of the protector body because the flow resistance of the synthetic resin is large, and the molten resin injected from the injection gate The flow path cross section in which the ribs 48 and 49 and the thick edge 45 are formed in the width direction flows preferentially in a large space (passage). For this reason, the synthetic resin is filled in the ribs 48 and 49 and the thick end edge 45 first, and then gradually flows from the ribs 48 and 49 and the thick end edge 45 into the thin region of the protector body. It will be. As a result, the filling of the synthetic resin is delayed in the thin region, and there is a problem that a short shot is likely to occur particularly in the thin region surrounded by the ribs 48 and 49 and the thick edge 45.

  In addition, since the molten resin is preferentially filled into the ribs 48 and 49 and the thick end edge 45 of the protector body, for example, in a thin region surrounded by the ribs 48 and 49 and the thick end edge 45. Then, the synthetic resin gradually flows inward from the periphery thereof, and in particular, is filled from the thick-walled edge 45 so as to return toward the rib 48 in the longitudinal direction. As a result, the air in the thin region is surrounded by the synthetic resin, so that the gas cannot be vented. As a result, air remains in the thin wall region surrounded by the ribs 48 and 49 and the thick edge 45, and air is trapped. Therefore, there is a problem that a molding defect such as air tight 52 that impairs the appearance of the molded product occurs. there were.

  In addition, in order to prevent the occurrence of molding defects such as short shots and air tights as described above, take measures such as making the thin part of the protector body thicker than the above-mentioned thickness, or devising the setting for degassing. It is possible. However, for example, if the thin portion of the protector body is made thicker than necessary to prevent molding defects, the weight of the fender protector will increase significantly and the cost will increase due to an increase in the amount of resin. In addition, there is a problem in that the molding shrinkage is increased during the injection molding, resulting in deformation. Moreover, when changing the degassing setting, there is a drawback that the structure of the injection molding machine and the mold becomes complicated.

  The present invention has been made in view of the above-described conventional problems, and a specific object thereof is to effectively reduce the rigidity and strength of a required portion without causing molding defects such as short shot and air tight at the time of injection molding. An object of the present invention is to provide a protector panel for a vehicle such as a fender protector which is enhanced and has suitable flexibility.

  In order to achieve the above object, a vehicle protector panel provided by the present invention has, as a basic configuration, a thin plate-like panel body having a thick-walled edge at least at a part of the edge. A first rib of a ridge disposed along the thick edge, and a plurality of second ribs extending from the first rib toward the thick edge. A protector panel for a vehicle made of a synthetic resin that is attached to a vehicle body for vehicle protection or the like, and is an area surrounded by the thick edge, the first rib, and the second rib on one surface of the panel body The main feature is to have a third rib extending from one of the thick edge, the first rib, and the second rib.

  In the vehicle protector panel according to the present invention, the third rib is preferably extended from the first rib, and the length of the third rib is 1 / length of the length of the second rib. It is preferably 2 or more and 2/3 or less.

Moreover, in this invention, it is preferable that the thickness of the thin part of the said panel main body is 0.8 mm or more and 1.3 mm or less, and the thickness of the said thick edge part is 2.0 mm or more and 3.0 mm or less. . Furthermore, it is preferable that the height of the first rib to the third rib is 3.0 mm to 4.5 mm and the width is 2.5 mm to 4.5 mm.
In this case, it is preferable that a gap is provided between the second rib and the thick edge portion.

  The vehicle protector panel according to the present invention is particularly preferably used as a fender protector.

  The protector panel for a vehicle according to the present invention has a thick edge, a first rib, and a first rib on one surface of the panel body toward a region surrounded by the thick edge, the first rib, and the second rib. It has the 3rd rib extended from either of 2 ribs.

  When the present inventors injection-mold a vehicle protector panel having the thick edge portion, the first rib, and the plurality of second ribs on one surface of the thin plate-like panel body, the short shot and the air tight are used. In order to prevent the occurrence of molding defects, the flow of the synthetic resin to the region surrounded by the thick edge and the first rib and the second rib is promoted, and the synthetic resin is more quickly filled in the region. The present invention has been completed by repeating intensive experiments and studies on the assumption that it can be carried out stably.

  That is, by extending the third rib toward a thin region surrounded by the thick edge, the first rib, and the second rib, the thick edge, the first rib, and the The molten synthetic resin can be poured into the space of the second rib, and the synthetic resin can be smoothly poured into and filled in the thin region surrounded by these portions via the third rib. In particular, in the enclosed thin region, it is possible to suppress the flow of the synthetic resin as in the past so as to return toward the first rib from the thick edge portion. As a result, the synthetic resin can be quickly and stably filled into the enclosed thin-walled area while filling the thick-walled edge with the synthetic resin, and the gas in the thin-walled area can be filled. It is also possible to easily perform the removal. Therefore, in the protector panel, it is possible to prevent the occurrence of molding defects such as short shot and air tight.

  Further, by disposing the third rib, the rigidity of the disposed region can be further increased. On the other hand, since the flexibility of the protector panel is hardly impaired and can be appropriately twisted (bent), it is possible to easily perform the attaching operation when attaching the protector panel to the vehicle body.

  In particular, in the present invention, since the third rib extends from the first rib, the molten synthetic resin is passed through the first rib and the third rib from the first rib side to the thick edge side. Therefore, it is possible to more smoothly prevent the occurrence of short shots and air tightness.

  In the present invention, when the length of the third rib is ½ or more of the length of the second rib, the synthetic resin can be efficiently filled into the enclosed thin region. Further, the rigidity of the panel body can be effectively improved. On the other hand, if the length of the third rib is 2/3 or less of the length of the second rib, the flexibility of the protector panel becomes more suitable, and the workability of attaching the protector panel to the vehicle is further improved. be able to.

  Moreover, it is preferable that the thickness of the thin part of the said panel main body is 0.8 mm or more and 1.3 mm or less. Thereby, the weight reduction of a protector panel and the cost reduction of a protector panel can be aimed at. On the other hand, the thickness of the thick edge portion is preferably 2.0 mm or more and 3.0 mm or less. Thereby, the rigidity and intensity | strength in the required part of a protector panel can be improved effectively. In addition, when a fixed portion that is fixed to the vehicle is formed on the thick edge portion, if the thick edge portion is formed with a thickness within the above range, the protector panel can be securely and securely attached to the vehicle with the fixing tool. The mounting state of the protector panel can be stabilized.

  Further, the first to third ribs preferably have a height of 3.0 mm to 4.5 mm and a width of 2.5 mm to 4.5 mm. By arranging the first rib to the third rib with such dimensions, the rigidity of the protector panel can be reliably improved, and a good synthetic resin flow support performance can be obtained at the time of injection molding. Can do.

  In this case, in the protector panel of the present invention, a gap is provided between the second rib and the thick edge portion. Moreover, it is preferable that the magnitude | size of this space | interval is 20 mm or more and 30 mm or less. Thereby, since the synthetic resin can be more reliably filled into the enclosed thin region, the occurrence of molding defects can be reliably prevented. At the same time, the flexibility of the protector panel can be improved, and the workability of attaching the protector panel can be improved.

  And the protector panel for vehicles of such this invention can be used especially suitably as a fender protector. That is, according to the present invention, the rigidity and strength of the curved surface of the extended portion and the bending portion are effectively enhanced, and the fender has a suitable flexibility and further does not generate short shots or air tights. A protector can be provided.

  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 similar operational effects. Is possible.

  For example, in the following embodiments, a fender protector is described as an example of a vehicle protector panel according to the present invention. However, the present invention can be similarly applied to members (molded articles) such as an under cover, an instrument panel, a door trim, and the like. In addition, the shape and the like in the fender protector of the following embodiment are merely examples, and can be appropriately changed according to the type of vehicle to be attached.

  Here, FIG. 1 is a schematic perspective view of the rear side of the fender protector according to the present embodiment as viewed obliquely from above, and FIG. 2 is a schematic perspective view of the front side of the fender protector as viewed from diagonally above. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1 when the fender protector is attached to the vehicle. Note that these drawings are partially illustrated with dimensions different from actual ones so that the features of the present invention can be easily understood, but the present invention is not limited to these. Moreover, in this embodiment, when the fender protector is attached to the automobile, the traveling direction of the automobile is the forward direction, and the backward direction is the backward direction. Also, the side facing the engine room of the fender protector is the inside, and the side facing the outside is the outside.

  A fender protector 1 according to this 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. As shown in FIG. It is attached to the inside of the wheel house of the panel 2 and covers the upper part of the tire 3. The fender protector 1 includes an arch-shaped curved portion 4, a substantially fan-shaped extended portion 5 that is bent and extended at the front end of the curved portion 4, and an extended portion 5 at the front inner side of the curved portion 4. The panel body is constituted by the side wall portion 6 arranged at a right angle to the side wall portion 6.

  The panel body of the fender protector 1 is formed in a thin plate shape having a wall thickness t of 0.8 mm or more and 1.3 mm or less, preferably about 1.0 mm, so that weight reduction is achieved. When the thickness t of the panel body is less than 0.8 mm, the thickness of the panel body may be too thin, and it may be difficult to obtain required rigidity and strength, and the thickness t exceeds 1.3 mm. As a result, the weight of the fender protector increases significantly, and the cost increases due to an increase in the amount of resin.

  Further, the panel main body is provided with a step edge portion 7 having a step along the outer edge thereof, and a part of the step edge portion 7 in the curved portion 4 and a substantially arcuate shape in the extending portion 5 are provided. The step edge portion 7 is formed as a thick edge portion 8 having a thickness T of 2.0 mm to 3.0 mm, preferably about 2.5 mm. If the thickness T is less than 2.0 mm, it may be difficult to effectively improve the rigidity and strength of the fender protector 1. On the other hand, if the thickness T exceeds 3.0 mm, the fender protector 1 There is a risk of reducing flexibility. Accordingly, by forming the thick edge portion 8 having the wall thickness T as described above, the flexibility of the fender protector 1 is maintained, and the curved surface on the rear side of the curved portion 4 and the extended portion are extended. The rigidity and strength in the portion 5 are effectively improved.

  Further, the bending portion 4 is formed with a notch 9 for inserting a suspension (not shown) at the inner portion of the top portion, and a bent portion 15 is formed at the rear end thereof. Further, a flange 10 is formed on the inner edge of the curved portion 4 from the portion where the notch 9 is provided to the bent portion 15.

  Furthermore, a plurality of fixing portions 16 that are fixed to the fender panel 2 by a fastener such as a clip are formed on the step edge portion 7 of the bending portion 4 and the extending portion 5. Fixing portions 17 for the fender panel 2 are respectively formed at predetermined positions on the flange 10 and the bent portion 15 of the bending portion 4 and the side wall portion 6.

  All of the flange 10 and the bent portion 15 of the curved portion 4 and the side wall portion 6 are disposed inside the vehicle, and there is a spatial margin in relation to other members of the vehicle (such as a vehicle body panel). Therefore, the flange 10, the bent portion 15, and the side wall portion 6 can be arranged in a direction intersecting with the curved surface of the curved portion 4, respectively, and it is easy to form a strong fixing portion with a fixing tool. A stable mounting state of the fender protector 1 is ensured.

  On the other hand, the step edge 7 that is disposed outside the vehicle and is easy to touch the human eye must form a strong fixing portion without causing a gap in relation to other members (fender panels) of the vehicle. The thickness of the thick edge portion 8 is set to 2.0 mm or more and 3.0 mm or less. In addition, since the fixing portions 16 formed on the step edge portion 7 are all thick, when the fender protector 1 is attached to the fender panel 2, a more stable attachment state is ensured. .

  The fixing portions 16 and 17 are formed by directly drilling attachment holes in predetermined portions such as the step edge portion 7 and the flange 10. For example, the step edge portion 7 and the flange 10 and the like are formed. It is also possible to form a fixing portion for the fender panel 2 by separately forming a small piece-like attachment portion at a predetermined location and by making an attachment hole in the attachment portion.

  In the fender protector 1 of the present embodiment, the surface (upper surface) of the curved portion 4 and the extending portion 5 is along the step edge portion 7 and in the longitudinal direction of the panel body so as to bypass the notch 9. The first rib 11 of the projected ridge, the plurality of second ribs 12 extending from the first rib 11 toward the step edge 7, the thick edge 8 and the first rib 11 And a plurality of third ribs 13 extending from the first rib 11 toward each region 20 (hereinafter referred to as “enclosed region 20”) surrounded by the first rib 11 and the second rib 12. A plurality of fourth ribs 14 extending from the one rib 11 toward the inner end edge are formed.

  In the fender protector 1 of this embodiment, two traces 18 of the injection gate for injecting synthetic resin in the injection molding of the fender protector 1 remain on the first rib 11. In the present embodiment, since the injection gate is formed on the first rib 11, the flow of the synthetic resin is more effectively supported, and the synthetic resin can be stably injected into the cavity. If the appearance or function of the molded product is impaired, the injection gate trace 18 can be removed by performing a finishing process or the like thereafter.

  Although the second rib 12 extends from the first rib 11 toward the step edge 7, the second rib 12 is not in contact with the step edge 7, and the second rib 12 and the step edge 7 are not in contact with each other. There is a space between the two. In particular, the second rib 12 that extends toward the thick edge portion 8 is provided with a gap 19 of 20 mm or more and 30 mm or less between the thick rib edge portion 8. The size of the interval 19 varies depending on the dimensions of the thick edge portion 8 and the first rib 11 to the fourth rib 14, but in the present embodiment, the interval 19 of 20 mm or more and 30 mm or less is provided. As described in detail below, short shots and air tightness can be effectively prevented during injection molding of the fender protector 1, and the flexibility of the fender protector 1 can be appropriately obtained. Therefore, the mounting workability to the automobile can be improved. In the present invention, such an interval 19 is not necessarily provided. For example, when the rib width or height is smaller than the range shown below, the second interval 19 is used to ensure rigidity and strength. It is also possible to connect the rib 12 directly to the step edge 7.

  Each of the third ribs 13 extends from the first rib 11 toward each enclosed region 20, and the length of each third rib 13 is the second that forms the enclosed region 20. The length of the rib 12 is set to be not less than 1/2 and not more than 2/3. By setting the third rib 13 to be ½ or more with respect to the second rib 12, the rigidity of the extended portion 5 of the fender protector 1 and the rear curved surface of the curved portion 4 is effectively increased. Can be improved. In addition, by setting the third rib 13 to be 2/3 or less with respect to the second rib 12, it is possible to ensure suitable flexibility of the fender protector 1.

  In addition, the length of the 2nd rib 12 said here means the average value of the two length, when the 2nd rib 12 which forms the enclosed area | region 20 exists in the front and back of the area | region. In addition, when there is only one second rib 12 as in the enclosed region 20 formed at the front end portion of the extending portion 5, it means the length of the second rib 12.

  Further, the first rib 11 to the fourth rib 14 formed in the fender protector 1 are formed so that the cross-section thereof is a substantially rectangular shape or a substantially mountain shape in which a base portion with the panel body is widened. The size of the cross section of each of the first rib 11 to the fourth rib 14 is substantially the same for all the ribs, and the height from the panel body surface is 3.0 mm to 4.5 mm, preferably about 3.5 mm. The width (in particular, the width at the position where the height of the rib is half) is set to 2.5 mm to 4.5 mm, preferably about 2.5 mm.

  Since the height of the first rib 11 to the fourth rib 14 is 3.0 mm or more and the width is 2.5 mm or more, the rigidity of the fender protector 1 can be reliably improved, and the fender protector 1 is injected. Good flow assist performance of the synthetic resin can be obtained when molding. Moreover, if the height and width of the first rib 11 to the fourth rib 14 are 4.5 mm or less, there will be no significant cost increase due to an increase in the amount of synthetic resin used.

  In the present invention, the number of the second ribs 12 and the fourth ribs 14 can be arbitrarily selected according to the size and shape of the fender protector 1. In the present embodiment, the first rib 11 to the fourth rib 14 are all formed on the surface of the panel main body, but may be formed on the back surface of the panel main body or on both the front and back surfaces as necessary. It is also possible.

  The fender protector 1 of the present embodiment having the above-described configuration is a space for forming the first rib 11 in the cavity formed between the upper mold and the lower mold that are clamped using the injection molding method. It can be easily produced by injecting an olefinic thermoplastic resin from two injection gates arranged on the (flow path).

  At this time, the synthetic resin injected from the injection gate is supported by the space (flow path) that forms the first rib 11 to the fourth rib 14 and the thick edge 8 and is stably filled in the cavity. Is done. Further, in the present embodiment, the third ribs 13 that are not provided in the conventional fender protector (see FIG. 6) are formed in each enclosed region 20, so that the first ribs 11 to the fourth ribs 14 and the thick wall are formed. When filling the edge portion 8 with the synthetic resin, the synthetic resin can be quickly and smoothly filled into the thin portions of the enclosed regions 20 via the third ribs 13.

  That is, conventionally, the thick wall edge is filled with the synthetic resin first, and air tightness is generated because the enclosed area cannot be degassed. 8 can be filled with the synthetic resin at the same time as the synthetic resin can be filled with the synthetic resin smoothly, so that the gas can be appropriately vented from the enclosed region 20 to prevent the occurrence of air tight or short shot. Can do.

  In particular, in the fender protector 1 of the present embodiment, as described above, the length of each third rib 13 is ½ or more of the length of the second rib 12 that forms the enclosed region 20. The flow of the synthetic resin flowing into the region 20 surrounded by the three ribs 13 is promoted. In addition, since a gap 19 is provided between the second rib 12 and the thick edge 8, the flow resistance of the synthetic resin flowing from the second rib 12 to the thick edge 8 during injection molding is slightly increased. It is done. Thereby, the filling timing of the synthetic resin to the thick edge portion 8 and the filling timing of the synthetic resin to the enclosed region 20 are appropriately controlled, and the occurrence of air tightness and short shot can be prevented more reliably.

  Further, since the third rib 13 is formed with an appropriate length on the rear curved surface of the curved portion 4 and the extending portion 5, it is possible to maintain these suitable flexibility of the fender protector 1. The rigidity and strength of the part can be further increased. Therefore, the fender protector 1 of the present embodiment not only has the advantage that the occurrence of molding defects is prevented, but also has excellent workability in mounting to an automobile, and further, the rear curved surface of the bending portion 4 and The extension part 5 is reinforced and the advantage that it becomes difficult to receive damage and a deformation | transformation at the time of driving | running | working of a motor vehicle is also acquired.

  For example, in the thin region formed by the step edge 7 that is not the thick edge 8 or the inner edge, the synthetic resin is gradually filled from the first rib 11 side toward the edge. Even if the third ribs 13 are not provided, no air tight or short shot occurs. In the present invention, it is naturally possible to provide the third rib 13 in a thin region other than the enclosed region 20.

  In the present invention, the third rib 13 can be extended toward the enclosed region 20 from any one of the thick edge portion 8, the first rib 11, and the second rib 12. However, by extending from the first rib 11 as in the present embodiment, the synthetic resin melted at the time of injection molding can be more quickly surrounded and filled in the region 20, so that short shots and air tight Occurrence can be prevented more reliably.

  The vehicle protector panel according to the present invention is effectively applied to a fender protector, an under cover, and the like that are required to have high rigidity and strength at a portion that is likely to be damaged or deformed, and that workability to the vehicle is good. .

It is the schematic perspective view which looked at the back side of the fender protector of this invention from diagonally upward. It is the schematic perspective view which looked at the front side of the fender protector from diagonally upward. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1 when the fender protector is attached to a vehicle. 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

DESCRIPTION OF SYMBOLS 1 Fender protector 2 Fender panel 3 Tire 4 Curved part 5 Extension part 6 Side wall part 7 Step edge part 8 Thick edge part 9 Notch 10 Flange 11 1st rib 12 2nd rib 13 3rd rib 14 4th rib DESCRIPTION OF SYMBOLS 15 Bending part 16,17 Fixed part 18 Trace of injection gate 19 Space | interval 20 Enclosed area 31 Fender protector 32 Bending part 33 Extension part 34 Embossing part 35 Injection gate 36 Rib 38, 38a Attachment part 41 Fender protector 42 Bending part 43 Extension Installation part 44 Side wall part 45 Thick end edge part 46 Step edge part 47 Flange 48 Longitudinal rib 49 Width direction rib 50 Injection gate trace 51, 51a Fixing part 52 Air tight 53 Notch

Claims (7)

First ribs of ridges arranged along the thick edge portion (8) on one surface of a thin plate-like panel main body having a thick edge portion (8) on at least a part of the edge. 11) and a plurality of second ribs (12) extending from the first rib (11) toward the thick edge (8). A protector panel for a vehicle made of synthetic resin,
On one surface of the panel body, the thick edge portion is directed toward a region (20) surrounded by the thick edge portion (8), the first rib (11), and the second rib (12). (8) A vehicle protector panel comprising a third rib (13) extending from any one of the first rib (11) and the second rib (12).   The vehicle protector panel according to claim 1, wherein the third rib (13) extends from the first rib (11).   The vehicle protector panel according to claim 1 or 2, wherein the length of the third rib (13) is not less than 1/2 and not more than 2/3 of the length of the second rib (12).   The thickness of the thin wall portion of the panel body is 0.8 mm to 1.3 mm, and the thickness of the thick edge portion (8) is 2.0 mm to 3.0 mm. Item 4. A vehicle protector panel according to any one of Items 1 to 3.   The height of the first rib (11) to the third rib (13) is 3.0 mm or more and 4.5 mm or less, and the width is 2.5 mm or more and 4.5 mm or less. The vehicle protector panel according to any one of 4.   The vehicle protector panel according to claim 4 or 5, wherein a space (19) is provided between the second rib (12) and the thick end edge (8). The vehicle protector panel according to claim 1, wherein the vehicle protector panel is used as a fender protector.

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