JP2018001999A - Molding resin parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding resin component which absorbs an impact load from below a vehicle and suppresses load transmission to a load transmitting member. SOLUTION: The molding resin parts are made of foamed resin, are provided in the lower part of the vehicle body, cover the vehicle sheet metal parts extending in the front-rear direction of the vehicle from the outside in the vehicle width direction, and the upper end portion on the front side of the vehicle is a front fender. A side plate portion to be attached, a lower plate portion protruding inward in the vehicle width direction from the lower end portion of the side plate portion to cover the vehicle sheet metal parts from below the vehicle, and a lower plate portion protruding inward in the vehicle width direction from the side plate portion and in the vehicle vertical direction. The lower end is connected to the lower plate portion, and the upper end portion has a vertical rib arranged so as to face the lower end portion of the front fender, and the vertical rib is on the vehicle front side of the lower plate portion. A plurality of plastics are formed within a range of 250 mm from the end of the vehicle to the rear side of the vehicle at intervals in the vehicle front-rear direction, and the width A of the bottom surface is 35% or less of the thickness B of the side plate portion in the portion where the vertical ribs are located. It is said that. [Selection diagram] Fig. 3

Description

  The present invention relates to a molding resin part of a vehicle, for example, an automobile.

  In Patent Document 1, a protrusion is formed on a lower plate portion of a rocker molding as a molding resin part, so that an impact load input from below the vehicle to the lower plate portion of the rocker molding is applied to the vehicle sheet metal via the protrusion. A technique for transmitting a load to a locker (a load transmitting member) as a component and maintaining the connection between the rocker molding and the front fender is disclosed.

Japanese Patent No. 5712421

  By the way, like the rocker molding disclosed in Patent Document 1, when a protrusion is formed by pushing a part of the lower plate portion upward, the rigidity of the protrusion in the vehicle vertical direction tends to be too high. . If the protrusion formed on the lower plate of the rocker molding is too rigid, the impact load received from below the vehicle cannot be absorbed sufficiently by the protrusion and is transmitted to the locker. May cause deformation in a part of the locker.

  In view of the above circumstances, an object of the present invention is to provide a molding resin component that absorbs an impact load from below the vehicle and suppresses load transmission to the load transmitting member.

Specific means for solving the problems include the following aspects.
<1> A vehicle sheet metal part that is provided at the lower part of the vehicle body and covers the vehicle sheet metal part extending in the vehicle front-rear direction from the outside in the vehicle width direction, and the vehicle has an upper end on the front side of the vehicle attached to the front fender and a lower plate of the side plate. A lower plate portion that protrudes inward in the width direction and covers the vehicle sheet metal part from below the vehicle, protrudes inward in the vehicle width direction from the side plate portion, extends in the vehicle vertical direction, and a lower end portion is connected to the lower plate portion, and an upper end And a vertical rib disposed opposite to the lower end of the front fender, the vertical rib extending from the vehicle front end of the lower plate portion to the vehicle rearward side within a range of 250 mm. A molding resin part formed of a foamed resin, which is formed in plural at intervals in the direction and has a bottom surface width A of 35% or less of the thickness B of the side plate portion in the portion where the vertical rib is located.
<2> A lateral rib that protrudes inward in the vehicle width direction from the side plate portion and extends in the vehicle front-rear direction and connects the longitudinal ribs adjacent to each other in the vehicle front-rear direction. The molding resin part as described in <1> which is 35% or less of the thickness D of the said side-plate part in the part in which a horizontal rib is located.

  ADVANTAGE OF THE INVENTION According to this invention, the molding resin component which absorbs the impact load from the vehicle downward direction and suppresses the load transmission to a to-be-loaded transmission member can be provided.

It is the side view which looked at the vehicle to which the molding resin part which concerns on an example of embodiment was applied from the side. It is the perspective view which looked at the part shown by the arrow 2 of the molding resin component of FIG. 1 from the vehicle width direction inner side. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. It is sectional drawing (4-4 sectional view taken on the line) of the vertical rib of FIG. FIG. 5 is a cross-sectional view (cross-sectional view taken along line 5-5) of the lateral rib of FIG.

Hereinafter, embodiments for carrying out the present invention will be described in detail. However, the present invention is not limited to the following embodiments. In the following embodiments, the components (including element steps and the like) are not essential unless otherwise specified. The same applies to numerical values and ranges thereof, and the present invention is not limited thereto.
In the present specification, the numerical ranges indicated by using “to” include numerical values described before and after “to” as the minimum value and the maximum value, respectively.
In the numerical ranges described stepwise in this specification, the upper limit value or the lower limit value described in one numerical range may be replaced with the upper limit value or the lower limit value of another numerical range. Good. Further, in the numerical ranges described in this specification, the upper limit value or the lower limit value of the numerical range may be replaced with the values shown in the examples.

  The molding resin part of the present embodiment is formed of foamed resin, is provided at the lower part of the vehicle body, covers a vehicle sheet metal part extending in the vehicle longitudinal direction from the outside in the vehicle width direction, and the upper end on the vehicle front side is the front fender. A side plate portion to be attached, a lower plate portion that projects inward in the vehicle width direction from the lower end portion of the side plate portion, and covers the vehicle sheet metal part from below the vehicle; A vertical rib disposed at a lower end portion connected to the lower plate portion and an upper end portion facing the lower end portion of the front fender, and the vertical rib is a vehicle front side of the lower plate portion. Are formed at intervals in the vehicle front-rear direction within a range of 250 mm from the end of the vehicle to the vehicle rear side, and the width A of the bottom surface is 35% or more of the thickness B of the side plate portion at the portion where the vertical rib is located. There is a. Hereinafter, although the specific example of a molding resin component is demonstrated, referring drawings, this invention is not limited to this. Moreover, the size of each part in each figure is conceptual, and the relative relationship of the size between each part is not limited to this.

  The rocker molding 20 as an example of the molding resin part of the present embodiment is attached to the vehicle body so as to cover the rocker 12 as an example of a vehicle sheet metal part in the vehicle (automobile) 10. In the drawings, the front side of the vehicle 10 (hereinafter referred to as “vehicle front” as appropriate) is indicated by an arrow FR, and the inner side in the width direction of the vehicle 10 (hereinafter referred to as “inner side in the vehicle width direction” as appropriate). An arrow IN indicates an upward direction of the vehicle 10 (hereinafter, referred to as “vehicle upward” as appropriate).

First, the lower side surface structure of the vehicle 10 to which the locker molding 20 is attached will be described.
As shown in FIG. 1, a pair of rockers 12 (only one side is shown in FIG. 3) extending in the vehicle front-rear direction are provided on both outer sides in the vehicle width direction of a floor panel 11 (see FIG. 3) of the vehicle 10. These lockers 12 are disposed between the front wheel 15 and the rear wheel 16 of the vehicle 10.

  As shown in FIG. 3, the rocker 12 includes a semi-cylindrical rocker outer panel 13 and a rocker inner panel 14. The rocker outer panel 13 is formed in a lateral U-shape that is open toward the inner side in the vehicle width direction, and a vertical flange portion 13A is formed above and below the opening edge. On the other hand, the rocker inner panel 14 is formed in a laterally U-shape that opens toward the outside in the vehicle width direction, and a vertical flange portion 14A is formed above and below the opening edge. The upper and lower vertical flange portions 13 </ b> A and 14 </ b> A of the rocker outer panel 13 and the rocker inner panel 14 are joined to each other, thereby forming a square cylindrical rocker 12.

  A front pillar (not shown) is erected on the vehicle front side of the locker 12, and the front pillar and the upper side surface of the rocker 12 on the vehicle front side are covered with a front fender 17 (see FIG. 1). A center pillar (not shown) is erected at the center of the locker 12 in the vehicle front-rear direction, and a rear pillar (not shown) is erected on the vehicle rear side of the locker 12. The rear pillar and the upper side surface of the rocker 12 on the vehicle rear side are covered with a rear fender 18 (see FIG. 1). Further, at least a part of the lower side surface and the lower surface of the locker 12 is covered with the locker molding 20 of the present embodiment.

Next, the locker molding 20 of this embodiment will be described.
As shown in FIGS. 2 and 3, the rocker molding 20 includes a side plate portion 22, a lower plate portion 24, and vertical ribs 26.

  The side plate portion 22 is a portion that covers the rocker 12 from the outside in the vehicle width direction, and the surface (surface on the outside in the vehicle width direction) 22A is a design surface. An upper end 22 </ b> B on the vehicle front side of the side plate portion 22 is attached to the front fender 17. Specifically, as shown in FIG. 3, a clip mounting seat 23 is formed on the upper end portion 22 </ b> B of the side plate portion 22 so as to protrude inward in the vehicle width direction from the back surface (surface opposite to the design surface) 22 </ b> C. The clip 19 attached to the clip mounting seat 23 (not shown in FIG. 2) is inserted into a through hole (not shown) formed on the lower end portion 17A side of the front fender 17 so that the side plate portion 22 (rocker molding 20 ) Is attached to the front fender 17. On the other hand, an upper end portion 22D on the vehicle rear side of the side plate portion 22 is attached to the rear fender 18.

  The lower plate portion 24 is a portion that protrudes inward in the vehicle width direction from the lower end portion of the side plate portion 22 and covers the rocker 12 from below the vehicle.

  The vertical rib 26 protrudes inward in the vehicle width direction from the side plate portion 22 and extends in the vehicle vertical direction. The vertical rib 26 is arranged such that the lower end portion 26 </ b> A is connected to the lower plate portion 24 and the upper end portion 26 </ b> B is opposed to the lower end portion 17 </ b> A of the front fender 17. Note that the lower end portion 17A of the front fender 17 of the present embodiment is a portion where the side plate portion of the front fender 17 is folded back toward the inside in the vehicle width direction.

  A clearance S1 along the vehicle vertical direction between the vertical rib 26 and the lower end portion 17A of the front fender 17 is narrower than a clearance S2 along the vehicle vertical direction between the rocker 12 and the lower plate portion 24. . For this reason, when the impact load P is input to the rocker molding 20 from the lower side of the vehicle, the upper end portion 26B of the vertical rib 26 is connected to the front fender 17 before the pushed-up lower plate portion 24 comes into contact with the lower end portion of the rocker 12. It contacts the lower end 17A. Therefore, in the rocker molding 20 of this embodiment, it is possible to suppress or prevent the impact load P from below the vehicle from being transmitted to the rocker 12.

  Further, a plurality of the vertical ribs 26 are formed at intervals in the vehicle front-rear direction within a range X (see FIG. 1) of 250 mm from the front end portion 24A on the vehicle front side of the lower plate portion 24 to the vehicle rear side.

  As shown in FIG. 4, the vertical rib 26 protrudes from the back surface 22 </ b> C of the side plate portion 22, and has a shape that becomes narrower toward the tip in the protruding direction. The width A of the bottom surface of the vertical rib 26 is 35% or less of the thickness B of the side plate portion 22 in the portion where the vertical rib 26 is located. In the present specification, the “bottom surface of the vertical rib 26” is a cross section obtained when the vertical rib 26 is cut from the side plate portion 22 where the side surface 26C of the vertical rib 26 rises from the back surface 22C of the side plate portion 22. Means. Further, “the width A of the bottom surface of the vertical rib 26” means a distance (a dimension indicated by an arrow A in FIG. 4) between both side surfaces 26 </ b> C of the vertical rib 26 on the bottom surface of the vertical rib 26. The “thickness of the side plate portion 22 at the portion where the vertical rib 26 is located” means the thickness (the dimension indicated by the arrow B in FIG. 4) of the side plate portion 22 at the portion where the vertical rib 26 is located. Further, from the viewpoint of securing the strength of the vertical rib 26, the width A of the bottom surface of the vertical rib 26 is preferably 22% or more of the thickness B of the side plate portion 22 in the portion where the vertical rib 26 is located, and 25% More preferably. Note that “sink” refers to a dent generated on a surface (for example, a design surface) opposite to a surface on which a rib is provided. If sink marks occur, the appearance may be impaired.

  The width A of the bottom surface of the vertical rib 26 is not particularly limited as long as the above condition is satisfied. From the viewpoint of securing the strength of the vertical ribs 26 and obtaining the reinforcing effect of the side plate portion 22, the value of the width A is preferably as large as possible. For example, it is preferably 0.8 mm or more, and more preferably 1.0 mm or more. On the other hand, from the viewpoint of suppressing the occurrence of resin sink on the side plate portion 22, the width A is preferably as small as possible. For example, it is preferably 1.6 mm or less, and more preferably 1.3 mm or less.

  The thickness B of the side plate portion 22 in the portion where the vertical ribs 26 are located is not particularly limited as long as the above condition is satisfied. From the viewpoint of suppressing the occurrence of sink marks in the resin of the side plate portion 22, the thickness B is preferably as large as possible. For example, it is preferably 2.5 mm or more, more preferably 2.7 mm or more, and further preferably 3.0 mm or more. On the other hand, from the viewpoint of reducing the thickness of the rocker molding 20 (side plate portion 22), the smaller the value of the thickness B, the better. For example, it is preferably 4.0 mm or less, and more preferably 3.5 mm or less.

  Moreover, as FIG.2 and FIG.3 shows, as for some vertical ribs 26 among several vertical ribs 26, the lower end part 26A side protrudes in the width direction inner side rather than the other part 26D. With this configuration, the rigidity of the lower plate portion 24 is improved.

  As shown in FIGS. 2 and 3, the rocker molding 20 may further include a lateral rib 28. The lateral rib 28 protrudes inward in the vehicle width direction from the side plate portion 22 and extends in the vehicle longitudinal direction, and connects the longitudinal ribs 26 adjacent in the vehicle longitudinal direction. A plurality of the lateral ribs 28 are formed between the adjacent longitudinal ribs 26 at intervals in the vehicle vertical direction. For this reason, in this embodiment, the vertical rib 26 and the horizontal rib 28 are arrange | positioned at the grid | lattice form. Further, in the present embodiment, the uppermost horizontal rib 28 is disposed below the upper end portion 26 </ b> B of the vertical rib 26.

  As shown in FIG. 5, the lateral rib 28 protrudes from the back surface 22 </ b> C of the side plate portion 22, and has a shape that becomes narrower toward the tip in the protruding direction. The width C of the bottom surface of the horizontal rib 28 is set to 35% or less of the thickness D of the side plate portion 22 in the portion where the horizontal rib 28 is located. In the present specification, the “bottom surface of the lateral rib 28” means a cross section obtained when the lateral rib 28 is cut from the side plate portion 22 where the side surface 28A of the lateral rib 28 rises from the back surface 22C of the side plate portion 22. Means. Further, “the width C of the bottom surface of the lateral rib 28” means a distance (a dimension indicated by an arrow C in FIG. 5) between both side surfaces 28A of the lateral rib 28 on the bottom surface of the lateral rib 28. The “thickness of the side plate portion 22 in the portion where the lateral rib 28 is located” means the thickness (the dimension indicated by the arrow D in FIG. 5) of the side plate portion 22 in the portion where the lateral rib 28 is located. From the viewpoint of securing the strength of the lateral rib 28, the width C of the bottom surface of the lateral rib 28 is preferably 22% or more of the thickness D of the side plate portion 22 in the portion where the lateral rib 28 is located, and 25% More preferably.

  The width C of the bottom surface of the lateral rib 28 is not particularly limited as long as the above condition is satisfied. From the viewpoint of securing the strength of the lateral ribs 28 and sufficiently obtaining the reinforcing effect of the side plate portions 22 and the longitudinal ribs 26, the value of the width C is preferably as large as possible. For example, it is preferably 0.8 mm or more, and more preferably 1.0 mm or more. On the other hand, from the viewpoint of suppressing the occurrence of resin sink marks on the side plate portion 22, the width C is preferably as small as possible. For example, it is preferably 1.6 mm or less, and more preferably 1.3 mm or less.

  The thickness D of the side plate portion 22 in the portion where the lateral rib 28 is located is not particularly limited as long as the above condition is satisfied. From the viewpoint of suppressing the occurrence of resin sink marks on the side plate 22, the thickness D is preferably as large as possible. For example, it is preferably 2.5 mm or more, more preferably 2.7 mm or more, and further preferably 3.0 mm or more. On the other hand, from the viewpoint of reducing the thickness of the rocker molding 20 (side plate portion 22), the thickness D is preferably as small as possible. For example, it is preferably 4.0 mm or less, and more preferably 3.5 mm or less.

  As shown in FIGS. 2 and 3, the rocker molding 20 further includes a lateral rib 30. The lateral rib 30 protrudes inward in the vehicle width direction from the side plate portion 22 and extends in the vehicle front-rear direction, and the front plate portion 21 on the vehicle front side of the rocker molding 20 and the vertical rib 26 closest to the front plate portion 21. Are connected. A plurality of the lateral ribs 30 are formed between the front plate portion 21 and the vertical rib 26 closest to the front plate portion 21 with a space in the vehicle vertical direction. The relationship between the width of the bottom surface of the lateral rib 30 and the thickness of the side plate portion 22 at the portion where the lateral rib 30 is located is the same as that of the lateral rib 28, and the dimensions are also the same.

  In the present embodiment, the horizontal ribs 30 and the horizontal ribs 28 are arranged in a line along the vehicle front-rear direction, but the present invention is not limited to this configuration, and the horizontal ribs 30 and the horizontal ribs 28 are It does not have to be arranged in a line along the vehicle longitudinal direction. That is, the lateral rib 30 and each lateral rib 28 may be arranged so as to be shifted in the vehicle vertical direction.

  Further, the rocker molding 20 of the present embodiment is an integrally molded product of resin, and a foamed resin is used as the resin. That is, the rocker molding 20 is made of a foamed resin.

  The resin constituting the rocker molding 20 is not particularly limited. For example, it can be selected from thermoplastic resins generally used for injection molding. Specifically, polyethylene resins, polypropylene resins, composite polypropylene resins, polystyrene resins, polyethylene terephthalate resins, polyvinyl alcohol resins, vinyl chloride resins, ionomer resins, polyamide resins, acrylonitrile / butadiene / styrene. Examples include copolymer resins and polycarbonate resins. Among these, at least one selected from the group consisting of a polypropylene resin, a composite polypropylene resin, and an acrylonitrile / butadiene / styrene copolymer resin is preferable. Resin used for manufacture of the rocker molding 20 may be only 1 type, or may be 2 or more types.

  Examples of the foaming agent include organic foaming agents such as azodicarbonamide, and inorganic foaming agents such as sodium hydrogen carbonate (also known as sodium bicarbonate and sodium bicarbonate). At present, in foam molding of automotive interior parts, inorganic sodium hydrogen carbonate is mainly used as a foaming agent, but an organic foaming agent is preferable from the viewpoint of improving coating film performance (warm water resistance, etc.). .

  Examples of the organic foaming agent include azodicarbonamide (ADCA), N, N-dinitrosopentamethylenetetramine (DPT), 4,4-oxybisbenzenesulfonylhydrazide (OBSH), hydrazodicarbonamide (HDCA), and the like. Azodicarbonamide (ADCA) is preferred.

Next, the operation and effect of this embodiment will be described.
Since the rocker molding 20 of the present embodiment has a plurality of vertical ribs 26 formed on the side plate portion 22, when an impact load P is input to the lower plate portion 24 from below the vehicle, the upper end portion 26B of the vertical rib 26 is Abutting on the lower end portion 17 </ b> A of the front fender 17, the impact load P is transmitted to the front fender 17 via the vertical ribs 26. At this time, since at least the upper end portion 26B is not restrained in the vehicle front-rear direction by the horizontal rib 28, the vertical rib 26 is deformed so as to bend in the vehicle front-rear direction when the load is transmitted to the front fender 17, and a part of the impact load P is generated. Can be absorbed. That is, the rocker molding 20 can absorb the impact load P input from below the vehicle and suppress the load transmission to the front fender 17 (an example of a load transmitting member).

  In particular, when running on a snowy road, ice blocks are likely to be formed by the snow splashed by the front wheel 15 within the range X of the rocker molding 20, that is, within the range X of 250 mm from the front end 24A of the lower plate portion 24 to the vehicle rear side. When this ice block rides on a step on the road surface, an excessive impact load P is input, but a part of the impact load P is absorbed by the vertical ribs 26, so that load transmission to the front fender 17 is suppressed. The deformation of the front fender 17 can be suppressed.

  Moreover, when the adjacent vertical ribs 26 are connected by the horizontal ribs 28, the buckling deformation of the vertical ribs 26 with respect to the impact load P from below the vehicle can be suppressed. That is, by connecting the adjacent vertical ribs 26 with the horizontal ribs 28, it is possible to prevent the vertical ribs 26 from being damaged by buckling deformation while securing the effect of absorbing the impact load P by the vertical ribs 26.

  Further, when the front plate portion 21 of the rocker molding 20 and the vertical rib 26 closest to the front plate portion 21 are connected by the horizontal rib 30, the front plate portion 21 against the impact load P from below the vehicle. The buckling deformation of the nearest vertical rib 26 can be further suppressed. That is, by connecting the front plate portion 21 and the vertical rib 26 closest to the front plate portion 21 with the horizontal ribs 30, the effect of absorbing the impact load P by the vertical ribs 26 is secured, and the vertical ribs 26 are deformed by buckling deformation. It is possible to suppress damage.

  Further, since the width A of the bottom surface of the vertical rib 26 is set to 35% or less of the thickness B of the side plate portion 22 in the portion where the vertical rib 26 is located, the side plate portion even if the rocker molding 20 (side plate portion 22) is thinned. Resin sink marks are less likely to occur on the surface 22A of the surface 22, that is, the design surface.

  Similarly, when the lateral rib 28 is provided, the width C of the bottom surface of the lateral rib 28 is set to 35% or less of the thickness D of the side plate portion 22 in the portion where the lateral rib 28 is located. Even if it is made, resin sink marks hardly occur on the surface 22A of the side plate portion 22, that is, the design surface. Further, since the relationship between the width of the bottom surface of the lateral rib 30 and the thickness of the side plate portion 22 at the portion where the lateral rib 30 is located is the same as that of the lateral rib 28, the same effect as the lateral rib 28 is obtained.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited by these Examples. In the following examples, the appearance was confirmed.

(1) Production of test resin molded product 1 Resin material for producing a test resin molded product by mixing 100 parts by mass of a polypropylene resin as a resin and 2 parts by mass of azodicarbonamide (ADCA) as a foaming agent Was prepared. Using this resin material, a test resin molded product 1 was produced by injection foam molding.

  As a mold used for producing the test resin molded product 1, a pair of molds including a movable mold that simulates the shape of an automobile rocker molding and a fixed mold are used. The fixed-side mold was provided with recesses corresponding to the shape of ribs at arbitrary 30 locations, and 30 ribs (ribs 1 to 30) were formed on the surface of the main body of the test resin molded product 1. Table 1 shows the width (mm) of the bottom surface of each of the ribs 1 to 30. Note that the “ribs” here correspond to the vertical ribs and the horizontal ribs in the present embodiment.

  The injection foam molding conditions were a mold temperature of 50 ° C., a cylinder temperature of 220 ° C., a cooling time of 15 seconds, and a resin material temperature of 220 ° C. during injection. The interval between the movable mold and the fixed mold before injection of the resin material was 1.9 mm, and the movable mold was not moved after injection and the resin material was not foamed.

(2) Production of test resin molded product 2 Test resin molded product 1 except that after the resin material was injected, the movable mold was moved away from the fixed mold (core back) to foam the resin material. In the same manner as above, a test resin molded product 2 was produced. The distance between the molds after the core back (the thickness of the main body of the resin material) was 3.2 mm.

(3) Production of test resin molded product 3 Test resin molded product 1 except that after the resin material was injected, the movable side mold was moved away from the fixed side mold (core back) to foam the resin material. In the same manner as above, a test resin molded product 3 was produced. The distance between the molds after the core back (the thickness of the main body of the resin material) was 2.8 mm.

(4) Sinking determination About the produced resin molded products for test 1 to 3, the surface opposite to the surface on which the ribs 1 to 30 are provided is observed, and the place corresponding to the location where the ribs 1 to 30 are located. Whether or not sink marks were generated was examined and evaluated according to the following criteria. The results are shown in Table 1.

When there is no visible sink mark ... A
Visible sink marks are generated, but it can be improved by molding conditions etc ... B
When visible sink marks have occurred and it is recognized that improvement is difficult due to molding conditions, etc.… C

  As shown in Table 1, when the width A of the bottom surface of the rib is 35% or less of the thickness B of the main body in the portion where the rib is located, no visible sink marks are generated. On the other hand, when the width A of the bottom surface of the rib exceeds 35% of the thickness B of the main body at the portion where the rib is located, sink marks have occurred.

10 vehicles 12 lockers (vehicle sheet metal parts)
17 Front fender 17A Lower end (lower end of front fender)
20 Locker molding (molded plastic parts)
22 side plate part 22B upper end part (upper end part of side plate part)
24 Lower plate part 24A Front end part (end part on the vehicle front side)
26 Vertical rib 26A Lower end (lower end of vertical rib)
26B Upper end (upper end of vertical rib)
28 Horizontal rib A Width (width of bottom of vertical rib)
B Thickness (side plate thickness)
C width (width of bottom of horizontal rib)
D Thickness (side plate thickness)

Claims (2)

A side plate portion that is provided at a lower portion of the vehicle body, covers a vehicle sheet metal part extending in the vehicle front-rear direction from the outside in the vehicle width direction, and an upper end portion on the vehicle front side is attached to the front fender;
A lower plate portion projecting inward in the vehicle width direction from the lower end portion of the side plate portion and covering the vehicle sheet metal part from below the vehicle;
A vertical rib that protrudes inward in the vehicle width direction from the side plate portion and extends in the vehicle vertical direction, a lower end portion is connected to the lower plate portion, and an upper end portion is disposed to face the lower end portion of the front fender,
Have
A plurality of the vertical ribs are formed at intervals in the vehicle front-rear direction within a range of 250 mm from the end of the lower plate portion on the vehicle front side to the vehicle rear side, and the width A of the bottom surface is located at the position of the vertical rib. A molding resin part formed of foamed resin, which is 35% or less of the thickness B of the side plate portion in the portion to be processed. A lateral rib that protrudes inward in the vehicle width direction from the side plate portion and extends in the vehicle longitudinal direction, and connects the longitudinal ribs adjacent in the vehicle longitudinal direction;
2. The molding resin part according to claim 1, wherein the lateral rib has a bottom width C of 35% or less of a thickness D of the side plate portion in a portion where the lateral rib is located.

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