JP2018090068A - Vehicular bumper structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular bumper structure that can suppress electric corrosion which occurs between different kinds of metal at low costs.SOLUTION: Gaps (a gap part 48 and a gap part 54) into which water droplets W can flow down are formed between a license plate 24 and a recessed bearing surface 44 of a plated lacing 38. This allows the water droplet W intruding between the license plate 24 and the plated lacing 38 to flow down through the gap part 48 and the gap part 54, and to be guided through a rectangular hole 34 of a radiator lower grill 10 to a back side 11 of the radiator lower grill 10. In short, water is prevented from being accumulated between the license plate 24 and the plated lacing 38, which can suppress occurrence of electric corrosion of the license plate 24. Thus, as the electric corrosion of the license plate 24 is suppressed from occurring by adjusting a gap t1 between the license plate 24 and the plated lacing 38, an insulation tape for suppressing the electric corrosion is not required, so that costs for members does not occur unlike a case where the insulation tape is used.SELECTED DRAWING: Figure 4

Description

    The present invention relates to a vehicle bumper structure.

  In the following Patent Document 1, in an assembling method of dissimilar metal plates, an electrically insulating adhesive tape (hereinafter referred to as “insulating tape”) is attached in advance to one of the bonding surfaces of both plates, and this insulating tape is used. A technique is disclosed in which both plate materials are stacked via a fastening member and both plate members are fastened via a fastening member. Thus, in this prior art, the effect that electrolytic corrosion can be prevented is obtained by providing an insulating tape between both plate materials.

JP 2006-306335 A

  However, in the above prior art, an insulating tape must be pasted in advance on one of the bonding surfaces of two plate materials made of different metals, which is troublesome. Moreover, the member cost of insulating tape itself will also generate | occur | produce.

  In view of the above fact, an object of the present invention is to provide a vehicular bumper structure capable of suppressing electric corrosion generated between different metals at low cost.

  The bumper structure for a vehicle according to claim 1 includes a bumper main body member provided at a front portion of the vehicle or a rear portion of the vehicle, a metal decoration molding member provided on a surface of the bumper main body member, and the metal decoration molding member. A metal plate that is formed of a material different from the metal used for the vehicle and has an upper end in the vehicle vertical direction that overlaps with the metal decoration molding member when viewed from the outside of the vehicle along the vehicle longitudinal direction. A first gap portion provided between the upper end portion of the metal plate and the metal decoration molding member along which water droplets can flow down, and an upper end portion of the metal plate and the metal decoration molding along the vehicle longitudinal direction And a second gap portion which is provided between the members and is located on the lower side of the first gap portion in the vehicle vertical direction and has a larger gap than the first gap portion.

  In the vehicle bumper structure according to claim 1, a metal decorative molding member is provided on the surface of the bumper main body member provided at the front portion or the rear portion of the vehicle. The upper end in the vehicle vertical direction of the metal plate formed of a material different from the metal used for the metal decorative molding member overlaps with the metal decorative molding member when viewed from the vehicle outer side along the vehicle longitudinal direction. .

  Here, a first gap is provided between the upper end of the metal plate and the metal decorative molding member along the vehicle longitudinal direction, and water drops can flow down the first gap. That is, even if water enters between the back surface of the upper end portion of the metal plate and the surface of the metal decoration molding member, the water is provided between the upper end portion of the metal plate and the metal decoration molding member. Since it flows down through the gap, water does not collect between the upper end of the metal plate and the metal decorative molding member. Further, here, a second gap portion is provided between the upper end portion of the metal plate and the metal decoration molding member along the vehicle front-rear direction and located below the first gap portion in the vehicle vertical direction. The second gap is formed with a larger gap than the first gap.

  That is, in this invention, the water which permeated between the back surface of the metal plate and the surface of the metal decoration molding member flows down through the first gap portion and the second gap portion.

  By the way, the metal which forms a metal plate, and the metal used for the metal decoration molding member are formed with a different material. For this reason, for example, when water accumulates between the metal plate and the metal decoration molding member, the metal plate and the metal decoration molding member come into contact with each other through the water, and the metal plate and the metal decoration molding member In the state of contact, electrolytic corrosion is promoted on the metal side having a high ionization tendency.

  On the other hand, in the present invention, as described above, the water that has entered between the back surface of the metal plate and the surface of the metal decoration molding member flows down through the first gap and the second gap, Water does not collect between the back surface of the metal plate and the surface of the metal decorative molding member. For this reason, the electric corrosion of the metal side with a high ionization tendency can be suppressed.

  Therefore, in this invention, the insulation tape for suppressing an electric corrosion is unnecessary, and member expense does not generate | occur | produce compared with the case where an insulation tape is used.

  As described above, the vehicular bumper structure according to claim 1 has an excellent effect that the electrolytic corrosion generated between different metals can be suppressed at a low cost.

FIG. 2 is an exploded perspective view showing a radiator lower grill to which a vehicle bumper structure according to the present embodiment is applied, a license plate, and an enlarged perspective view of a main part of the radiator lower grill. It is a vehicle front view which shows the state by which the license plate was attached to the radiator lower grill provided with the bumper structure for vehicles which concerns on this Embodiment. FIG. 3 is a cross-sectional view taken along line 3-3 shown in FIG. FIG. 4 is a cross-sectional view taken along line 4-4 shown in FIG. It is explanatory drawing which shows the flow path of the water droplet which entered between the radiator lower grill provided with the bumper structure for vehicles which concerns on this Embodiment, and a license plate. FIG. 6 is a cross-sectional view corresponding to FIG. 5 showing a modification of the radiator lower grill provided with the vehicle bumper structure according to the present embodiment. It is the perspective view seen from the vehicle rear side which shows the modification of the radiator lower grill provided with the bumper structure for vehicles concerning this embodiment, and the principal part expansion perspective view of a radiator lower grill.

  Hereinafter, the vehicle bumper structure according to the present embodiment will be described with reference to the drawings. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, an arrow RH indicates the vehicle right direction, and an arrow LH indicates the vehicle left direction. Hereinafter, when simply using the front-rear, up-down, left-right directions, unless otherwise specified, the front-rear direction of the vehicle, the up-down direction of the vehicle, the left-right direction of the vehicle width when facing the traveling direction are shown. Shall.

(Configuration of vehicle bumper structure)
First, the configuration of the vehicle bumper structure according to the present embodiment will be described.

  In general, although not shown, a bumper cover constituting a front bumper is provided at the front end of the vehicle along the vehicle width direction. A radiator upper grill is provided at the center of the bumper cover in the vehicle width direction, and an emblem is attached to the center of the radiator upper grill.

  Here, FIG. 1 shows a radiator lower grill (bumper body member) 10 provided at a lower portion of a bumper cover (not shown). The radiator lower grill 10 has a substantially rectangular shape here, and is formed of a resin such as PP (polypropylene), for example. The shape of the radiator lower grill 10 is not limited to this.

  A plurality of fitting portions 12 are formed at the peripheral edge of the radiator lower grill 10. The radiator lower grill 10 is fixed to the bumper cover by fitting the fitting portion 12 to the peripheral portion of the opening formed in the bumper cover (not shown). In addition, a plurality of hexagonal recesses 13 are formed in the upper portion of the radiator lower grill 10, and a plurality of hexagonal through holes 14 are formed in the lower portion of the radiator lower grill 10 to form a honeycomb structure 16. Yes.

  Further, a pedestal 18 having a substantially rectangular shape when viewed from the front of the vehicle is provided at the upper center of the radiator lower grill 10. A standing wall portion 20 is provided around the pedestal 18, and the pedestal 18 protrudes from the surface 22 </ b> A of the radiator lower grill body 22 toward the front side. A license plate 24 made of an aluminum alloy is attached (fastened) to the pedestal 18.

  More specifically, insertion holes 28 through which the bolts 26 can be inserted are formed at the upper end 18A of the base 18 and at both ends in the vehicle width direction. As shown in FIG. , And is fastened to the base 18 via a washer 30 and a slide nut 32. 3 is a cross-sectional view taken along the line 3-3 shown in FIG. 2, and FIG. 2 shows a vehicle front view showing a state in which the license plate 24 is attached to the base 18. As shown in FIG. ing.

  By the way, as shown in FIG. 1, a pair of rectangular holes 34 and 36 penetrates the upright wall portion 20 </ b> A of the pedestal 18 along the vehicle width direction. The rectangular holes 34 are respectively arranged at the center of the pedestal 18 in the vehicle width direction, and the rectangular holes 36 are arranged at both ends of the pedestal 18 in the vehicle width direction.

  As shown in FIG. 3, the pedestal 18 is formed to be smaller than the outer shape of the license plate 24. For this reason, in a state where the license plate 24 is fastened to the pedestal 18, the outer edge portion 25 of the license plate 24 protrudes from the outer edge portion (the standing wall portion 20) of the pedestal 18.

  On the other hand, as shown in FIG. 1, a plating molding (metal decoration molding member) 38 is attached to the upper end portion 10 </ b> A of the radiator lower grill 10 along the vehicle width direction of the radiator lower grill 10. The plating molding 38 is obtained by decorating the surface of a molding member formed of resin with decorating plating. For example, chromium plating is used. Further, at the center of the plating mall 38 in the vehicle width direction, a notch portion cut out upward from the lower end 38A of the plating mall 38 along the outer shape of the base 18 formed on the radiator lower grill 10. 40 is formed.

  FIG. 4 is a cross-sectional view taken along line 4-4 shown in FIG. As shown in FIGS. 1 and 4, a recessed seat surface 44 that is recessed toward the vehicle rear side from the surface 42 </ b> A of the plating molding main body 42 is formed around the notch 40 along the shape of the notch 40. Is formed. In addition, a standing wall portion 45 that rises toward the vehicle front side is provided around the recessed seat surface 44, and protrudes toward the vehicle front side from the plating mall body 42 around the standing wall portion 45. A convex portion 46 is provided.

  As shown in FIGS. 2 and 3, the convex portion 46 is formed so as to cover the outside of the upper end portion 25 </ b> A of the license plate 24 fastened to the pedestal 18. That is, in a state where the license plate 24 is fastened to the base 18 of the radiator lower grill 10, the upper end portion 25A of the license plate 24 is plated with the radiator lower grill 10 when viewed from the front of the vehicle (as viewed from the outside of the vehicle along the vehicle longitudinal direction). It overlaps with the concave seating surface 44 of the molding 38.

  In the present embodiment, as shown in FIG. 4, a gap (first gap) is formed between the back surface 24 </ b> A of the upper end portion 25 </ b> A of the license plate 24 and the base portion 47 of the concave seat surface 44 of the plating molding 38. ) 48 is provided. The gap t1 in the gap 48 is set to about 3 mm, for example, and the water droplet W can flow down in the gap 48.

  Further, a fold portion 50 that bends toward the vehicle rear side starting from the fold point 50 </ b> A is formed along the shape of the notch portion 40 at the notch portion 40 side of the base 47 in the concave seat surface 44. . Further, the notched portion 40 of the concave seat surface 44 is provided with a bent portion 52 that bends toward the vehicle rear side starting from the bent point 52A. That is, the recessed seat surface 44 is formed so as to be gradually separated from the back surface 24A of the license plate 24 as it goes from the folding point 50A to the bending point 52A.

  In the present embodiment, a gap 48 is provided between the back surface 24 </ b> A of the license plate 24 and the base 47 of the concave seat surface 44 of the plating molding 38, and the gap t <b> 1 in the gap 48 is a standing wall 45. It is substantially constant from the side to the break point 50A.

  In addition, a gap 54 (second gap) is provided below the folding point 50A with the back surface 24A of the license plate 24, and the gap 54 gradually increases toward the lower side. It has become. In the gap portion 54, the gap t2 between the back surface 24A of the license plate 24 and the bending point 52A of the concave seat surface 44 of the plating molding 38 is set to about 5 mm, for example.

  Furthermore, the bent portion 52 of the plating molding 38 is set so as to overlap with the upright wall portion 20A of the radiator lower grill 10 with a gap portion (third gap portion) 56 provided in the vertical direction. The gap t3 in the gap 56 is set to about 1 mm, for example. Here, the dimension of the gap 56 is set as a dimension that obtains the action (capillary phenomenon) of drawing the water drop W into the gap 56 using the surface tension of the water drop W.

(Operation and effect of vehicle bumper structure)
Next, operations and effects of the vehicle bumper structure according to the present embodiment will be described.

  As shown in FIG. 1, in the present embodiment, a chrome-plated plating molding 38 is provided on the surface of the upper end portion 10 </ b> A of the radiator lower grill 10. On the other hand, the license plate 24 is made of an aluminum alloy. That is, the metal used for the plating molding 38 is made of a material different from that of the license plate 24.

  For example, although not shown, when water accumulates between the license plate 24 and the plating molding 38, the license plate 24 and the plating molding 38 come into contact with each other through the water. In this case, since aluminum has a higher ionization tendency than chromium, electrolytic corrosion is promoted on the license plate 24 side made of an aluminum alloy.

  On the other hand, in the present embodiment, as shown in FIG. 3, the license plate 24 and the base 47 of the concave seat surface 44 of the plating molding 38 with the license plate 24 fastened to the base 18 of the radiator lower grill 10. In the meantime, a gap t1 through which the water droplet W can flow is provided.

  As a result, even if water (water droplets W) enters between the license plate 24 and the concave seat surface 44 of the plating molding 38, the water droplet W is provided between the license plate 24 and the concave seating surface 44 of the plating molding 38. Since the water flows down through the formed gap 48, water does not accumulate in the gap 48.

  Further, the notched portion 40 of the concave seat surface 44 is provided with a bent portion 52 that is bent toward the vehicle rear side. Then, the recessed seat surface 44 is formed so as to be gradually separated from the back surface 24A of the license plate 24 as it goes from the folding point 50A to the bending point 52A. That is, the gap (gap portion 54) between the license plate 24 and the recessed seat surface 44 of the plating molding 38 gradually increases as it goes downward from the break point 50A.

  Therefore, in this embodiment, the water droplets W that have entered between the license plate 24 and the concave seating surface 44 of the plating molding 38 flow down through the gap 48 and the gap 54. Then, when the water droplet W reaches the bending point 52A, it is peeled off from the surface 44A of the concave seat surface 44. Note that a fold point 50 </ b> A is formed on the concave seat surface 44, and the water droplet W flowing on the surface 44 </ b> A of the concave seat surface 44 can be separated from the surface 44 </ b> A of the concave seat surface 44 by the fold point 50 </ b> A. Moreover, since the folding part 50 is bent toward the vehicle rear side from the folding point 50A, the water droplet W flowing on the surface 44A of the concave seat surface 44 can be guided to the vehicle direction side.

  As described above, the water droplets W peeled from the surface 44A of the concave seat surface 44 pass through the rectangular holes 34 formed in the upper wall portion 20A of the radiator lower grill 10 as shown by the arrow A, and then the radiator lower grill 10 To the rear surface 11 side. That is, since water does not collect between the upper end portion 25A of the license plate 24 and the surface 44A of the concave seat surface 44 of the plating molding 38, the electrolytic corrosion of the license plate 24 can be suppressed.

  As described above, in this embodiment, since the electric corrosion of the license plate 24 is suppressed by adjusting the gap t1 between the license plate 24 and the plating molding 38, an insulating tape for suppressing the electric corrosion is unnecessary. There is no member cost compared to the case of using an insulating tape. As a result, according to the present embodiment, electrolytic corrosion that occurs between different metals can be suppressed at low cost.

  Further, in the present embodiment, as shown in FIGS. 3 and 4, the bent portion 52 of the plating molding 38 overlaps with the upper wall portion 20 </ b> A of the radiator lower grill 10 with a gap portion 56 provided in the vertical direction. Is set. The gap t3 of the gap 56 is set to a dimension that can obtain the action (capillary phenomenon) of drawing the water drop W into the gap 56 using the surface tension of the water drop W.

  Here, for example, as shown in FIG. 4, when the rectangular hole 34 of the radiator lower grill 10 is formed below the bending point 52 </ b> A of the plating molding 38, the back surface 24 </ b> A of the license plate 24 and the plating molding 38. The flow of water (water droplets W) that has entered between the concave seat surfaces 44 will be described.

  In this case, as shown in FIGS. 4 and 5, the water droplet W flows down through the gap 48 and the gap 54, and when it reaches the bending point 52A, it peels off from the surface 44A of the concave seat surface 44, and It is guided through the rectangular hole 34 to the rear surface 11 side of the radiator lower grill 10 (arrow A). 5 is an explanatory diagram showing a flow path of water droplets that have entered between the back surface 24A of the license plate 24 and the concave seat surface 44 of the plating molding 38. FIG.

  On the other hand, as shown in FIG. 3, when the rectangular hole 34 of the radiator lower grill 10 is not formed below the bending point 52 </ b> A of the plating molding 38, the water droplets W are formed using the capillary phenomenon by the gap portion 56. The concave seat surface 44 is drawn toward the surface 44A side. In this case, as shown in FIGS. 3 and 5, the water droplet W flows down through the gap portion 48 and the gap portion 54, and is held on the surface 44 </ b> A of the concave seat surface 44 when reaching the bending point 52 </ b> A. Then, the water droplet W moves on the surface 44A of the concave seat surface 44 to the rectangular hole 34 along the vehicle width direction, and is guided to the rear surface 11 side of the radiator lower grill 10 through the rectangular hole 34 (arrow B). ).

  Here, in order to easily move the surface 44A of the concave seat surface 44 to the rectangular hole 34 along the vehicle width direction, for example, the upper wall portion 20A of the radiator lower grill 10 is directed toward the rectangular hole 34 or the rectangular hole 36. An inclined surface that gently slopes downward may be formed.

  In the present embodiment, as described above, the water droplet W flowing down the surface 44A of the concave seat surface 44 is attracted to the surface 44A side of the concave seat surface 44 by utilizing the capillary phenomenon by the gap 56. As shown in FIG. 6, at the upper side of the upper wall portion 20A of the radiator lower grill 10, the back of the gap portion 56 provided between the bent portion 52 of the plating molding 38 and the upper wall portion 20A of the radiator lower grill 10. A through hole 58 may be formed in the hole.

  In this case, the water droplet W can be sucked into the gap portion 56 using the capillary phenomenon by the gap portion 56, and the sucked water droplet W can be guided to the back surface 11 side of the radiator lower grill 10 through the through hole 58. (Arrow C). In order to secure the strength of the pedestal 18, the through hole 58 is preferably set at a position that does not overlap the rectangular holes 34 and 36 in the vertical direction as shown in FIG. Here, FIG. 7 shows a perspective view of the radiator lower grill 10 as viewed from the rear side of the vehicle, and an enlarged perspective view of a main part of the radiator lower grill 10.

  In the above embodiment, the gap portion 56 is provided between the bent portion 52 of the plating molding 38 and the upper wall portion 20A of the radiator lower grill 10, but the gap portion 56 is not necessarily provided. For example, the bent portion 52 may not be formed in the plating molding 38.

  Further, the concave seat surface 44 in the present embodiment is formed with a folding portion 50 that is bent toward the vehicle rear side starting from the folding point 50A, but the water droplet W flowing down the surface 44A of the concave seat surface 44 is bent. Since it suffices to fall from the point 52A, the folded portion 50 is not necessarily required. For example, the surface 44A of the concave seat surface 44 may be formed so as to be gradually separated from the back surface 24A of the license plate 24 toward the notch 40 of the concave seat surface 44. It may be formed in a step shape.

  Furthermore, although the above-mentioned embodiment demonstrated the front bumper, the vehicle bumper structure according to the present embodiment may be applied to a rear bumper.

  As described above, an example of the embodiment of the present invention has been described. However, the embodiment of the present invention is not limited to the above, and one embodiment and various modifications may be used in combination as appropriate. Needless to say, the present invention can be implemented in various forms without departing from the gist of the invention.

10 Radiator lower grill (bumper body member)
24 License plate (metal plate)
25A Upper end (upper end of metal plate)
38 Plating Mall (Metal decoration molding material)
48 gap (first gap)
54 gap (second gap)

Claims (1)

A bumper body member provided at the front or rear of the vehicle;
A metal decorative molding member provided on the surface of the bumper body member;
A metal plate that is formed of a material different from the metal used for the metal decoration molding member, and that overlaps the metal decoration molding member when viewed from the vehicle outer side along the vehicle front-rear direction.
With
A first gap portion provided between an upper end portion of the metal plate and the metal decoration molding member along the vehicle front-rear direction;
It is provided between the upper end portion of the metal plate and the metal decoration molding member along the vehicle longitudinal direction, and is located on the lower side in the vehicle vertical direction of the first gap portion, and the gap is larger than the first gap portion. A large second gap,
A bumper structure for vehicles.