JP6548583B2 - Air dam mounting structure - Google Patents

Description

  The present invention relates to an air dam attachment structure for attaching an air dam to a lower portion of a vehicle bumper.

  In some vehicles, an air dam (sometimes called a spoiler) is attached to the lower part of a bumper on the front side of the vehicle. As such an air dam, for example, as described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2003-237639), an attachment portion having a substantially U-shaped cross section and a flat plate hanging from a front portion of the attachment portion And a plurality of lips formed on the upper and lower surfaces of the upper piece of the mounting portion and the upper surface of the lower piece. In this patent document 1, the mounting portion of the air dam is fitted to the support portion so as to sandwich the horizontal plate-like support portion provided on the lower front surface of the bumper, and the lip of the mounting portion is the lower outer surface of the bumper and the upper and lower portions of the support portion. The air dam is attached and fixed to the lower part of the bumper by bringing it into close contact with both sides.

Unexamined-Japanese-Patent No. 2003-237639

  However, the technique of Patent Document 1 merely causes the lip of the mounting portion to be in close contact with the surface on the bumper side, so that the following problems may occur. When the lower part of the air dam hits a curb or the like while the vehicle is traveling, the lower part of the air dam (that is, the lower part of the fin) is pushed backward, and the upper part of the air dam (that is, the attachment part) is pushed upward while being pulled forward Force may act. For this reason, when the lower part of the air dam hits a curb or the like, the mounting part of the air dam may come off from the support part of the bumper, and the air dam may come out of the bumper. In addition, a gap may be generated between the bumper and the air dam, which may deteriorate the appearance.

  Therefore, the problem to be solved by the present invention is to provide an air dam attachment structure that can make the air dam difficult to be removed from the bumper and can improve the appearance.

  In order to solve the above problems, the invention according to claim 1 comprises a bumper attached to the front of the vehicle along the vehicle width direction, a long air dam attached to the bottom of the bumper along the vehicle width direction, and An air dam attachment structure including: an upper wall portion provided in a lower portion of the bumper and extending in the front-rear direction, a bottom wall portion extending downward from a rear portion of the upper wall portion, and a lower portion of the bottom wall portion; A recessed groove that is open in the forward direction, surrounded by three sides by a lower wall extending forward from the bottom, a mounting hole that penetrates the bottom wall of the recessed groove in the front-rear direction, and a lower portion from the upper wall of the recessed groove The air dam has a flat front wall extending in the vertical direction, a flat mounting portion extending rearward from an upper portion of the front wall, and the mounting portion in the vertical direction. And the mounting portion is inserted into the recessed groove and It is characterized in that the projection with being inserted into the mounting hole is engaged with the rearward edge of the through hole.

  As described above, when the lower part of the air dam hits a curb or the like while the vehicle is traveling, the lower part of the air dam (that is, the lower part of the front wall) is pushed backward and the upper part of the air dam (that is, the attachment part) is pushed upward A force may act in the direction of being pulled forward. In the invention according to claim 1, since the protrusion protruding from the upper wall portion of the recessed groove is engaged with the through hole of the attachment portion, the attachment portion is pushed upward when the lower portion of the air dam hits a curb or the like. Even if a force is applied in the direction of being pulled forward while the mounting portion is pushed upward, a force is applied in the direction in which the engagement between the protrusion and the through hole becomes strong, and the mounting portion is difficult to remove from the recessed groove As a result, the air dam can not be easily removed from the bumper. In addition, since the projection is engaged with the rear edge of the through hole, the mounting portion can be maintained in a state of being drawn into the recessed groove, thereby preventing a gap from being generated between the bumper and the air dam. It can be improved.

  According to the second aspect of the present invention, the rear side surface of the bottom wall portion and the rear side surface of the projection are on the same plane (that is, the projection is provided at the bottom of the concave groove). You may In this way, the projection and the through hole are engaged at the bottom of the concave groove, and even if the concave groove is deformed so as to open, it can be made less susceptible to the influence, and the attachment portion The air dam can be made more difficult to come off from the bumper by making it even more difficult to come off the recessed groove.

  Further, as in claim 3, the front surface of the protrusion is a surface inclined with respect to the upper wall portion, and the rear surface of the protrusion is a surface perpendicular to the upper wall portion. You may In this way, it is possible to make it difficult for the mounting portion to come off the recessed groove while making it easy to insert the mounting portion into the recessed groove.

  According to a fourth aspect of the present invention, the mounting portion is formed of an elastically deformable material that is more rigid than the front wall portion, and the front wall portion is formed of a softer material than the mounting portion. You may do so. By forming the mounting portion of an elastically deformable material having rigidity, the projection can be reliably engaged with the through hole of the mounting portion. Further, by forming the front wall portion with a soft material, when a force is applied to the front wall portion, the front wall portion can be deformed to make it difficult for the force to be applied to the mounting portion.

  Furthermore, as in claim 5, the front wall portion is formed continuously with the mounting portion with the same material as the mounting portion at the rear portion at the top, and a portion other than the rear portion at the top is the mounting It may be made of a material softer than the part. In this way, the rigidity of the upper rear portion of the front wall (that is, the root portion of the front wall) can be increased, and the original shape can be easily returned even if the front wall is deformed. it can.

FIG. 1 is a front view of a vehicle equipped with an air dam according to an embodiment of the present invention. FIG. 2 is a passenger side of the cross-sectional view taken along the line A-A of FIG. FIG. 3 is a cross-sectional view taken along line B-B of FIG. FIG. 4 is a cross-sectional view taken along the line C-C of FIG. 2, showing a state before the air dam is attached. FIG. 5 is a cross-sectional view taken along the line C-C in FIG. 2 and showing a state after the air dam is attached. FIG. 6 is a diagram for explaining a defect in the comparative example.

Hereinafter, an example embodying the mode for carrying out the present invention will be described.
As shown in FIG. 1, a long bumper 11 is attached to the front of the vehicle along the vehicle width direction, and a long air dam 12 is attached to the lower part of the bumper 11 along the vehicle width direction. ing. The bumper 11 is formed of a polymer material such as polypropylene (containing ethylene propylene copolymer and talc), and the air dam 12 is formed of a polymer material such as an olefin-based thermoplastic elastomer. As shown in FIG. 2, the air dam 12 is manufactured in a linearly extending shape (refer to the two-dot chain line in FIG. 2) but is bent according to the shape of the bumper 11 (refer to the broken line in FIG. 2) Attached to the bumper 11.

Next, the air dam attachment portion structure will be described based on FIGS. 2 to 5.
As shown in FIGS. 3 to 5, the air dam 12 is formed in an L-shaped cross section. The air dam 12 is provided with a flat front wall 13 extending in the vertical direction and a lip 14 extending forward and upward from the upper portion of the front wall 13 in a vehicle mounted state. In addition, flat plate-like clip fastening portions 15 (see FIG. 3) extending rearward from the top of the front wall portion 13 are provided at a plurality of locations in the longitudinal direction (vehicle width direction) of the air dam 12. The portion 15 is joined in an L shape. Further, flat plate-like mounting portions 16 (see FIGS. 4 and 5) extending rearward from the top of the front wall portion 13 are provided at a plurality of locations in the longitudinal direction of the air dam 12 different from the clipping portions 15. The front wall portion 13 and the mounting portion 16 are joined in an L shape.

  As shown in FIG. 2, the clip fastening portions 15 and the mounting portions 16 are alternately arranged along the longitudinal direction of the air dam 12. A flat plate portion extending rearward from the upper portion of the front wall portion 13 between the clip holding portion 15 and the mounting portion 16 in the longitudinal direction of the air dam 12 (that is, a portion where the clip holding portion 15 and the mounting portion 16 are not provided) 17 are provided. The clip fastening portion 15 and the mounting portion 16 project rearward relative to the flat plate portion 17.

  As shown in FIGS. 2 and 3, each clip fastening portion 15 is provided with a through hole 18 which passes through the clip fastening portion 15 in the vertical direction. Of the through holes 18 of the clip fastening portion 15, the through hole 18 near the longitudinal center of the air dam 12 is formed in a circular shape, but the other through holes 18 are elongated holes extending in the longitudinal direction of the air dam 12 It is formed in shape.

  As shown in FIG. 2 and FIG. 4, each mounting portion 16 is provided with a through hole 19 penetrating the mounting portion 16 in the vertical direction. The through hole 19 of the mounting portion 16 is formed in an elongated hole shape extending in the longitudinal direction of the air dam 12.

  The air dam 12 is formed by subjecting an extrusion-formed product formed by extrusion to a pressing process (punching process). The air dam 12 may be formed by injection molding. The clipable portion 15 and the attachment portion 16 of the air dam 12 and the flat plate portion 17 (hereinafter, these may be generically referred to as “attachment portion 16 etc.”) Hardness in durometer type A according to JIS K6253 is a material within the range of A95 ± 5. On the other hand, the front wall portion 13 of the air dam 12 is formed of a material (for example, a material having a hardness of durometer type A according to JIS K6253 within the range of A70 ± 5) softer than the mounting portion 16 and the like. However, in the front wall portion 13, the upper rear side portion 13a is formed continuously with the mounting portion 16 and the like with the same material as the mounting portion 16 and the like, and portions other than the upper rear side portion 13a are more than the mounting portion 16 etc. It is made of soft material. The lip portion 14 of the air dam 12 is formed continuously with the front wall portion 13 with the same material as the front wall portion 13 (a material softer than the attachment portion 16 or the like). In addition, at the joint between the front wall 13 and the attachment 16 etc. (for example, the rear portion 13a at the top of the front wall 13), the coefficient of linear expansion is more than that of the material forming the front wall 13 and the attachment 16 etc. A small material (eg, metal) may be embedded.

  As shown in FIG. 3, in the lower portion of the bumper 11 in a portion corresponding to the clipping portion 15 of the air dam 12, a wall 23 (the upper wall 23 of the concave groove 22 described later) which forms the lower surface of the main body of the bumper 11. An engagement hole 20 is provided which penetrates in the vertical direction). The clip 21 is inserted into the through hole 18 and the engagement hole 20 in a state where the through hole 18 of the clipping portion 15 of the air dam 12 and the engagement hole 20 of the wall portion 23 of the bumper 11 are aligned. As a result, the clip 21 inserted into the through hole 18 on the air dam 12 side is engaged with the engagement hole 20 on the bumper 11 side, and the clip fastening portion 15 of the air dam 12 is made a lower part of the bumper 11 by the clip 21. It is fixed.

  As shown in FIGS. 4 and 5, a recess 22 is provided along the longitudinal direction (the vehicle width direction) of the bumper 11 at least in a portion corresponding to the mounting portion 16 of the air dam 12 in the lower portion of the bumper 11. There is. The recessed groove 22 has an upper wall 23 (a wall 23 forming the lower surface of the main body of the bumper 11) extending in the front-rear direction and a bottom wall 24 extending downward from the rear of the upper wall 23 in a vehicle mounted state. And a lower wall portion 25 extending forward from the lower portion of the bottom wall portion 24 so as to be surrounded on three sides, and is opened so as to extend slightly toward the front. A mounting hole 26 penetrating the bottom wall 24 in the front-rear direction is provided in at least a portion of the bottom wall 24 of the recessed groove 22 corresponding to the mounting portion 16 of the air dam 12. In the portion corresponding to the attachment portion 16 of the air dam 12, a protrusion 27 projecting downward from the upper wall portion 23 is provided. The longitudinal dimension of the projection 27 in the longitudinal direction of the bumper 11 is shorter than the longitudinal dimension of the through hole 19 in the longitudinal direction of the air dam 12.

  As shown in FIG. 4, the projections 27 are formed such that the front surface 27 a is inclined with respect to the upper wall portion 23 and the rear surface 27 b is perpendicular to the upper wall portion 23. ing. The projection 27 is provided on the bottom of the recessed groove 22 so that the rear surface 24b of the bottom wall 24 and the rear surface 27b of the projection 27 are on the same plane.

  The attachment portion 16 of the air dam 12 is inserted into the recessed groove 22 from the front of the bumper 11. Thereby, as shown in FIG. 5, the mounting portion 16 of the air dam 12 is inserted into the recessed groove 22 of the bumper 11, and the tip of the mounting portion 16 is inserted into the mounting hole 26 of the bottom wall portion 24 and The projection 27 on the 11 side is engaged with the rear edge of the through hole 19 of the mounting portion 16, and the mounting portion 16 of the air dam 12 is fixed to the lower portion of the bumper 11. As shown in FIGS. 3 and 5, when the air dam 12 is attached to the lower part of the bumper 11, the lip portion 14 of the air dam 12 is in contact with the lower part of the bumper 11.

  The comparative example shown in FIG. 6 is obtained by omitting the through hole 19 and the projection 27 from the configuration of the present embodiment. When the lower part of the air dam 12 hits a curb or the like while the vehicle is traveling, the lower part of the air dam 12 (that is, the lower part of the front wall 13) is pushed backward, and the upper part of the air dam 12 (namely, the attachment 16) is pushed upward A force may act in the direction of being pulled forward. However, in the comparative example shown in FIG. 6, since the through hole 19 and the projection 27 are not provided, when the lower part of the air dam 12 hits a curb or the like, the attachment portion 16 is pulled upward while being pushed upward. If a force is applied to the air dam 12, the attachment portion 16 of the air dam 12 may come out of the recessed groove 22 of the bumper 11, and the air dam 12 may be detached from the bumper 11. In addition, a gap may be generated between the bumper 11 and the air dam 12 to deteriorate the appearance.

  On the other hand, in the present embodiment, the projection 27 projecting from the upper wall portion 23 of the concave groove 22 is engaged with the through hole 19 of the mounting portion 16. Thus, when the lower part of the air dam 12 hits a curb or the like, the mounting part 16 is pushed upward even if a force is applied in a direction in which the mounting part 16 is pushed upward while being pushed upward. A force acts in a direction in which the engagement with the through hole 19 becomes stronger, so that the attachment portion 16 is less likely to come off the recessed groove 22, and the air dam 12 can be made difficult to come off the bumper 11. In addition, since the projection 27 is engaged with the rear edge of the through hole 19, the attachment portion 16 is maintained in a state of being drawn into the recessed groove 22, and a gap is generated between the bumper 11 and the air dam 12. Can be prevented and the appearance can be improved. In addition, the projection 27 engages with the through hole 19 to position the clip fastening portion 15 as well.

  Furthermore, in the present embodiment, the mounting hole 26 is provided in the bottom wall portion 24 of the recessed groove 22, and the tip end of the mounting portion 16 is inserted into the mounting hole 26 of the bottom wall portion 24. Thereby, the recessed groove 22 can be made shallow and the bumper 11 can be easily formed, and the mounting portion 16 is reliably inserted into the recessed groove 22 even if the length dimension of the mounting portion 16 varies in the front-rear direction be able to.

  Further, in the present embodiment, since the mounting portion 16 is flat, the shape of the mounting portion 16 is simple and the mounting portion 16 can be easily made. In addition, since the surface on the bumper 11 side (the lower surface of the upper wall portion 23) is flat, the flat mounting portion 16 can be smoothly inserted into the mounting hole 26. Furthermore, the mounting portion 16 can be inserted into the mounting hole 26 from the front of the bumper 11, and the air dam 12 can be easily mounted.

  Further, in the present embodiment, the projection 27 is provided at the bottom of the concave groove 22 so that the rear surface 24b of the bottom wall 24 and the rear surface 27b of the projection 27 are on the same plane. . As a result, the projection 27 and the through hole 19 are engaged at the bottom of the recessed groove 22. Even if the recessed groove 22 is deformed so as to be opened, the influence of the opening can be reduced. The portion 16 can be made more difficult to come off the recessed groove 22, and the air dam 12 can be made more difficult to come off the bumper 11.

  Furthermore, in the present embodiment, the front surface 27a of the projection 27 is a surface inclined with respect to the upper wall portion 23, and the rear surface 27b of the projection 27 is a surface perpendicular to the upper wall portion 23. The mounting portion 16 can be made difficult to come off the recessed groove 22 while the mounting portion 16 can be easily inserted into the recessed groove 22.

  Further, in the present embodiment, since the mounting portion 16 is formed of an elastically deformable material having rigidity more than that of the front wall portion 13, the projection 27 and the through hole 19 of the mounting portion 16 are reliably engaged. Can. Further, since the front wall portion 13 is formed of a material softer than the mounting portion 16, when a force is applied to the front wall portion 13, the front wall portion 13 is deformed and it is difficult to apply a force to the mounting portion 16. can do.

  Furthermore, in the present embodiment, the rear portion 13a of the upper portion of the front wall portion 13 is formed continuously with the mounting portion 16 with the same material as the mounting portion 16 and portions other than the rear portion 13a of the upper portion of the front wall portion 13 Is made of a softer material than the mounting portion 16, the rigidity of the upper rear portion 13a of the front wall 12 (that is, the root portion of the front wall 13) can be increased, and the front wall 13 Even if deformed, it can be easily returned to the original shape.

  Further, in the present embodiment, since the clip fastening portion 15 of the air dam 12 is fixed to the lower portion of the bumper 11 by the clip 21, the attachment strength of the air dam 12 to the bumper 11 can be stabilized. Moreover, since the clip fastening parts 15 and the mounting parts 16 are alternately arranged along the longitudinal direction of the air dam 12, the air dam 12 can be satisfactorily attached and fixed to the bumper 11 even if the clip fastening parts 15 are relatively small. it can.

  Further, in the present embodiment, since the lip portion 14 of the air dam 12 is in contact with the lower portion of the bumper 11, a gap is hardly generated between the bumper 11 and the air dam 12. Moreover, the lip portion 14 is formed continuously with the front wall portion 13 with the same material as the front wall portion 13 (material softer than the mounting portion 16). As a result, the lip portion 14 can elastically contact and follow the lower portion of the bumper 11, and since the lip portion 14 is made of the same material as the front wall portion 13, the appearance can be made uniform.

  Further, in the present embodiment, since the length dimension of the protrusion 27 in the longitudinal direction of the bumper 11 is shorter than the length dimension of the through hole 19 in the longitudinal direction of the air dam 12, adjustment of the attachment position in the longitudinal direction of the air dam 12 is It can be carried out.

  Although the wall portion 23 of the main body of the bumper 11 is used as the upper wall portion 23 of the recessed groove 22 in the above embodiment, the present invention is not limited to this. It may be provided to project downward from the wall portion 23.

  In the above embodiment, the rear surface 24b of the bottom wall portion 24 and the rear surface 27b of the projection 27 are on the same plane, but the present invention is not limited thereto. The surface 27 b may be located forward or rearward of the surface 24 b on the rear side of the bottom wall portion 24.

In the above embodiment, the air dam 12 is formed to have an L-shaped cross section. However, the air dam 12 may be formed to have a T-shaped cross section.
In addition, the present invention can be implemented with various modifications without departing from the scope of the present invention, for example, the shapes of the bumper 11 and the air dam 12 may be changed as appropriate.

  11: bumper, 12: air dam, 13: front wall, 16: mounting part, 19: through hole, 22: recessed groove, 23: upper wall, 24: bottom wall, 25: lower wall, 26: mounting Hole, 27 ... projection

Claims (5)

An air dam attachment structure including: a bumper attached to the front of a vehicle along the vehicle width direction; and a long air dam attached to a lower portion of the bumper along the vehicle width direction,
The bumper is formed in three directions by an upper wall portion provided in a lower portion of the bumper and extending in the front-rear direction, a bottom wall portion extending downward from a rear portion of the upper wall portion, and a lower wall portion extending forward from a lower portion of the bottom wall portion. And a mounting hole penetrating the bottom wall of the groove in the front-rear direction, and a protrusion protruding downward from the upper wall of the groove. ,
The air dam has a flat front wall extending in the vertical direction, a flat mounting portion extending rearward from the top of the front wall, and a through hole vertically passing through the mounting.
The air dam attachment structure according to claim 1, wherein the attachment portion is inserted into the recessed groove and inserted into the attachment hole, and the projection is engaged with a rear edge of the through hole.   The air dam mounting portion structure according to claim 1, wherein a rear side surface of the bottom wall portion and a rear side surface of the protrusion are on the same plane.   The front surface of the protrusion is a surface inclined with respect to the upper wall portion, and the rear surface of the protrusion is a surface perpendicular to the upper wall portion. Air dam attachment part structure as described in. The mounting portion is formed of an elastically deformable material that is more rigid than the front wall portion,
The air dam attachment portion structure according to any one of claims 1 to 3, wherein the front wall portion is formed of a material softer than the attachment portion.   In the front wall portion, the upper rear portion is formed continuously with the mounting portion with the same material as the mounting portion, and a portion other than the upper rear portion is formed of a softer material than the mounting portion The air dam mounting portion structure according to claim 4, wherein

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