JP2017087944A - Vehicle front structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle front structure with an absorption mechanism for head protection of a pedestrian while suppressing hanging of a bumper fascia.SOLUTION: A vehicle front structure comprises: a bumper fascia 12 which has a fascia upper end plate 16; and a shroud 2 which guides cooling air into a radiator. The bumper fascia and the shroud are connected to each other by a composite body consisting of a grill bracket 3 and an impact absorption member 4. The grill bracket 3 comprises: a plane part 31 extending in a vehicle width direction; a rear part 3A which includes a rear end part 311 connected to the shroud 2; and a front part 3B which includes a recess part 32 positioned below the fascia upper end plate 16, recessed below the plane part 31, and extending in the vehicle width direction. The impact absorption member 4 interposed between the fascia upper end plate 16 and the first recess part 33 comprises: an upper plate 41 which has a support part 411 supporting the fascia upper end plate 16; and a front plate 42 which has a fastening hole 421 fixed to a flange plate 35 defining the first recess part 33.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a front structure of a vehicle in which a bumper fascia and a shroud are provided at the front of the vehicle.

  A vehicle such as an automobile generally includes a bumper fascia at the front of the vehicle. The upper end portion (rear portion) of the bumper fascia forms a parting line with the front edge portion of the bonnet. Here, there may be a problem that the upper end portion of the bumper fascia hangs down by its own weight or an external load, the gap between the parting lines is expanded, and the appearance quality is deteriorated. In view of this problem, Patent Document 1 discloses a vehicle front structure in which an upper end portion of a bumper fascia is supported by a highly rigid member.

  In addition, assuming that the head of the pedestrian hits the bonnet when the front end of the vehicle collides with a pedestrian, the vehicle has a mechanism capable of absorbing a substantially vertical impact for protecting the head. It is known to incorporate in the front. This absorption mechanism is incorporated considerably rearward of the bumper fascia in an automobile having a general height at the front of the vehicle.

Japanese Patent Laid-Open No. 2003-261067

  However, in the case of a vehicle having a high vehicle height at the front portion of the vehicle, the region that needs to absorb the collision impact of the head is positioned in front of a vehicle having a general vehicle height. In this case, the upper end portion of the bumper fascia is included in the region that needs to be absorbed. However, if the upper end portion is supported by a highly rigid member in order to solve the drooping problem of the bumper fascia as in the front structure of Patent Document 1, an absorption effect cannot be expected.

  The objective of this invention is providing the front part structure of a vehicle provided with the absorption mechanism for a pedestrian's head protection, suppressing drooping of a bumper fascia.

  A front structure of a vehicle according to one aspect of the present invention is disposed at a front portion of the vehicle, and has a bumper fascia having an upper end portion facing a front edge of a bonnet, and is disposed behind the bumper fascia, and a predetermined device. A shroud for guiding cooling air to the shroud, a connecting member for connecting the shroud and the upper end portion of the bumper fascia, an impact absorbing member interposed between the upper end portion of the bumper fascia and the connecting member, The connecting member is positioned below a top portion of the bumper fascia, and is located below a rear portion having a flat portion extending in the vehicle width direction, a connecting portion connected to the shroud, and more than the flat portion. A front portion having a recess recessed downward and extending in the vehicle width direction, wherein the shock absorbing member is disposed on the recess, and the bumper fascia It includes a support portion for supporting the upper end portion and a fixed portion with respect to the connecting member.

  According to this front structure, the upper end portion of the bumper fascia is supported by the shroud via the composite body of the connecting member and the impact absorbing member. Therefore, drooping of the bumper fascia can be suppressed. Moreover, the upper end portion of the bumper fascia is supported by the impact absorbing member. For this reason, even when an impact in the vertical direction is applied to the upper end portion, the impact can be buffered by the impact absorbing member. Furthermore, since the recessed part is formed in the front part of a connection member, the rigidity in the vehicle width direction of the said connection member can be improved. Further, the vertical distance between the connecting member and the upper end portion of the bumper fascia is increased by the amount of depression of the recess. Since a configuration in which an impact absorbing member is arranged in the recess is adopted, the length of the impact absorbing member in the vertical direction can be increased, and a sufficient stroke for elastic deformation when a load is applied to the bumper fascia. Can be taken.

  In the front structure described above, it is preferable that the fixing portion of the shock absorbing member with respect to the connecting member is disposed above the flat portion.

  According to this front part structure, a moment that can be supported with high rigidity can be formed with respect to a load applied downward to the connecting member by disposing the fixing part above the plane part. .

  In the front structure, the front portion of the connecting member includes a flange plate extending upward, the shock absorbing member includes a front plate opposed to the flange plate, and the front plate includes the flange plate and the flange plate. It is desirable to include a lower portion that is arranged so as to overlap in the front-rear direction and forms the fixing portion, and an upper portion that does not overlap the flange plate in the front-rear direction.

  According to this front structure, the upper portion of the impact absorbing member, that is, the portion having a considerable vertical width can be utilized as a stroke portion for performing elastic deformation for load absorption. Therefore, it is possible to cause the shock absorbing member to absorb the shock satisfactorily. In addition, since the front plate and the flange plate are arranged so as to overlap in the front-rear direction, the insertion direction of a fixing screw or the like for fixing both is also directed in the front-rear direction. For this reason, it can be set as the structure where a screw tip does not point in the up-and-down direction which goes to the upper end part of a bumper fascia.

  In the front structure described above, the bumper fascia has a counter plate facing the flange plate of the connecting member, the flange plate has a mounting portion for the counter plate, and the mounting portion absorbs the impact. It is desirable that the member is disposed at substantially the same height as the fixing portion.

  According to this front structure, the connecting member has a direct attachment portion for the bumper fascia, so that the support state of the bumper fascia is stabilized. Further, since the attachment portion and the fixed portion are disposed at substantially the same height, the stroke is not reduced.

  In the front structure, the shock absorbing member includes an upper plate, a front plate, and a lower plate in a cross section along the front-rear direction of the vehicle, and has a U-shape that is open toward the rear, and the support It is preferable that the portion is disposed on the upper plate, and the fixing portion is disposed on the front plate or the lower plate.

  According to this front structure, the shock absorbing member is made of a structure that does not have a standing wall on the rear side, supports the upper end portion of the bumper fascia with the upper plate, and is fixed to the concave portion of the connecting member on the front plate or the lower plate. . Therefore, the impact absorbing member is easily deformable, and the impact absorbing member can be a structure that easily absorbs an impact applied from the top to the bottom.

  In the front structure, the concave portion includes a first concave portion on which the shock absorbing member is placed, and a second concave portion that is connected to the rear of the first concave portion and is recessed below the first concave portion. It is desirable to include.

  According to this front structure, since the second recess is recessed deeper than the first recess in which the shock absorbing member is placed, the rigidity of the connecting member in the vehicle width direction can be further enhanced. .

  In this case, it is desirable that the second recess has a function of a water drainage channel that enters from a gap between an upper end portion of the bumper fascia and a front edge of the bonnet.

  According to this front structure, when rainwater or the like enters the recess of the connecting member, the water flows into the deeper second recess. However, since this 2nd recessed part has the function of the drainage path of water, it can prevent that water retains in a recessed part.

  ADVANTAGE OF THE INVENTION According to this invention, the front part structure of a vehicle which made compatible the function which suppresses drooping of a bumper fascia, and the absorption function of the impact for a pedestrian's head protection can be provided.

It is a perspective view which shows an example of the front part of the vehicle to which this invention is applied. It is a front view of the front part of the vehicle. 1 is a perspective view illustrating a front structure of a vehicle according to an embodiment of the present invention. FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 2. It is a principal part expanded sectional view of FIG. FIG. 5 is a schematic cross-sectional view of a position shifted from FIG. 4 by a predetermined distance in the vehicle width direction. It is a schematic sectional drawing of the VII-VII line of FIG. It is a top view of the front part structure of the vehicle. It is a top view which removed the front grille from the state of FIG. FIG. 10 is a top view with the grill bracket removed from the state of FIG. 9. It is a perspective view of the assembly of a grill bracket, an impact-absorbing member, and a cover member. It is a disassembled perspective view of the said assembly. It is a perspective view of a grill bracket simple substance. It is a perspective view of the impact-absorbing member single body seen from diagonally forward. It is a principal part expansion perspective view of FIG. 14A. It is a perspective view of the impact-absorbing member single body seen from diagonally back. It is a principal part expansion perspective view of FIG. 15A. It is sectional drawing which shows the comparative example (modified embodiment) of the fixing structure of a grill bracket and an impact-absorbing member. It is sectional drawing which shows the fixation structure of the grill bracket of this embodiment, and an impact-absorbing member. It is sectional drawing which shows the fixation structure of the grill bracket and impact-absorbing member which concern on deformation | transformation embodiment. It is sectional drawing which shows the fixation structure of the grill bracket which concerns on a comparative example, and an impact-absorbing member.

[General description of the front of the vehicle]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a front portion 10 of a vehicle 1 to which the present invention is applied. In the figure, “front” and “rear” arrows in the longitudinal direction of the vehicle 1, “left” and “right” arrows in the vehicle width direction, and “up” and “down” arrows in the vehicle height direction are shown. Is appended. The arrows “front”, “rear”, “upper”, “lower”, “left”, and “right” in the following figures follow the direction indications of FIG. FIG. 2 is a front view of the front portion 10 of the vehicle, and FIG. 3 is a perspective view showing the structure of the front portion 10 of the vehicle according to the embodiment of the present invention.

  A bonnet 11 and a bumper fascia 12 are arranged as an exterior structure of the vehicle 1 at the front portion 10 of the vehicle 1. The bumper fascia 12 includes a fascia main body 12A that covers the front end portion of the vehicle 1, a front grill 13 that is disposed at the upper center in the left-right direction of the fascia main body 12A, and a bumper grill 14 that is disposed below the front grill 13. Including. Headlight openings 15 are provided at the left and right ends of the front grill 13. Further, a fascia upper end plate 16 (an upper end portion of the bumper fascia) that is a portion facing the front edge 11F of the bonnet 11 is attached to the upper surface of the front grill 13.

  Referring to FIG. 3, fascia upper end plate 16 is a plate-like member that is long in the left-right direction, and is inclined forward and downward along the inclination of bonnet 11. The rear end of the fascia upper end plate 16 includes an upper end edge 161 facing the front edge 11F of the bonnet 11 and an upper bracket 162 extending rearward from the upper end edge 161. The upper edge 161 and the front edge 11F are opposed to each other through a gap, and as shown in FIG. 1, a parting line P extending in the left-right direction is formed between the upper edge 161 and the front edge 11F. The upper bracket 162 is at a lower height than the upper end edge 161 and extends in a substantially horizontal direction. A rectangular notch 163 that is long in the left-right direction is provided at the center in the left-right direction of the upper bracket 162. The notch 163 is an opening for forming an access space AS into which a user inserts a finger when opening the hood 11.

  A shroud 2 is disposed behind the bumper fascia 12. The shroud 2 is a highly rigid frame structure for holding a radiator (predetermined device) (not shown) and guiding cooling air introduced through the front grill 13 to the radiator. The shroud 2 includes a shroud panel 21 forming a rectangular frame, and a shroud upper member 22 attached to the upper surface of the shroud panel 21.

  In this embodiment, the grill bracket 3 (connecting member) is bridged between the two so as to support the bumper fascia 12 using the shroud 2. Specifically, the shroud door upper member 22 and the fascia upper end plate 16 are connected by the grill bracket 3. This is to prevent the bumper fascia 12 from drooping due to its own weight. In other words, the fascia upper end plate 16 is lowered to prevent the gap between the parting lines P from expanding and the appearance quality from deteriorating.

  The grill bracket 3 is made of a highly rigid member such as a resin member containing glass fiber or a sheet metal. If such a high-rigidity support structure that supports the fascia upper end plate 16 with the grill bracket 3 cannot provide an impact absorbing function at that portion. In this case, when the vehicle height of the front portion 10 is high like the vehicle 1 of the present embodiment, the state is not preferable from the viewpoint of protecting the head of the pedestrian. In this embodiment, in view of this point, a front structure of the vehicle 1 is provided that has both a function of suppressing the drooping of the bumper fascia 12 and a function of absorbing an impact for protecting a pedestrian's head.

[Cross sectional structure of the front part of the vehicle]
4 is a schematic cross-sectional view taken along the line IV-IV in FIG. 2, and FIG. 5 is an enlarged cross-sectional view of the main part of FIG. FIG. 6 is a schematic cross-sectional view of a position shifted by a predetermined distance in the left-right direction from FIG. FIG. 7 is a schematic cross-sectional view taken along line VII-VII in FIG. 4 to 6 show a cross section of a portion deviated to the right from the central portion in the left-right direction, that is, a cross section of a portion located on the side of the portion where the access space AS exists. On the other hand, FIG. 7 shows a cross section of a central portion where the access space AS exists. Inside the front portion 10 of the vehicle 1 covered with the bonnet 11 and the bumper fascia 12, the above-described grill bracket 3, impact absorbing member 4 and cover member 5 are arranged.

<Cross-sectional structure of the side part of the access space>
First, the cross-sectional structure of the side portion of the access space AS will be described with reference to FIGS. The grill bracket 3 includes a rear portion 3A including a portion connected to the shroud 2, and a front portion 3B including a portion that is forward of the rear portion 3A and is located below the fascia upper end plate 16. FIG. 13 shows a perspective view of the grill bracket 3 alone.

  The rear portion 3A includes a plane portion 31 extending in the left-right direction that is the vehicle width direction, a rear end portion 311 that is a portion connected to the shroud 2, and a bent portion 312 that is a boundary portion between the front portion 3B. . The rear end 311 is stacked on the upper surface of the shroud upper member 22. The rear edge 31E of the rear end portion 311 and the rear edge of the shroud upper member 22 are at substantially the same longitudinal position. A screw hole 313 (FIG. 13) is drilled in the rear end 311, and a screw hole corresponding to the screw hole 313 is also drilled in the shroud upper member 22. A first fixing screw 61 made of a screw screw is screwed into the screw hole 313, whereby the rear end portion 311 is fixedly connected to the shroud upper member 22. The bent portion 312 is a portion where the front end of the flat portion 31 is bent downward.

  The front portion 3B is provided with a concave portion 32 that is recessed below the flat portion 31 and extends in the left-right direction, and a flange plate 35 that extends upward. The rear end wall of the recess 32 is a standing wall that continues to the bent portion 312, and the front end wall of the recess 32 is a flange plate 35. By forming such a recess 32 in the front portion 3B, the rigidity of the grill bracket 3 in the left-right direction can be increased. The concave portion 32 includes a first concave portion 33 located on the front side and a second concave portion 34 that is connected to the first concave portion 33 and is recessed below the first concave portion 33. That is, the bottom plate of the second recess 34 is located higher than the bottom plate of the first recess 33. As described above, by providing the recess 32 with the two recesses 33 and 34 having different recess heights, the rigidity of the grill bracket 3 in the left-right direction can be further increased.

  The first concave portion 33 is a portion where the shock absorbing member 4 is placed and is located below the upper bracket 162 of the fascia upper end plate 16. In addition to the function of increasing the rigidity described above, the second recess 34 also functions as a drainage path for water entering from the gap (parting line P) between the fascia upper end plate 16 and the front edge 11F of the bonnet 11. For this reason, a drain hole 341 (see FIG. 13) is formed in the bottom plate of the second recess 34. The bottom plate is inclined forward and downward as shown in FIGS. 4 and 5, and the drain hole 341 is disposed at the lowest portion of the bottom plate. When rainwater or the like enters the recess 32 through the parting line P, water flows into the deeper second recess 34. Since this water is discharged to the outside through the water drain hole 341, it is possible to prevent water from staying in the recess 32.

  The flange plate 35 is a portion that rises vertically upward from the front end edge of the front portion 3B. The rising height of the flange plate 35 is about half of the height in the vertical direction of an impact absorbing member 4 described later. A first fastening hole 352 through which the second fixing screw 62 that connects the grill bracket 3 and the shock absorbing member 4 is inserted is formed at a position near the upper edge 351 of the flange plate 35. The flange plate 35 does not necessarily have to rise from the front end edge of the front portion 3B, and may have a mode in which the flange plate 35 rises from a position retracted from the front end edge.

  The shock absorbing member 4 is a member interposed between the fascia upper end plate 16 and the grill bracket 3. More specifically, the shock absorbing member 4 is interposed between the upper bracket 162 of the fascia upper end plate 16 and the first recess 33 of the recess 32. The main functions of the shock absorbing member 4 are a function of supporting the bumper fascia 12 so that drooping due to the weight of the bumper fascia 12 does not occur, and a vertical impact with respect to the fascia upper end plate 16 (for example, the head of a pedestrian This is a function of buffering (absorbing) the impact when an impact is applied.

  The shock absorbing member 4 is formed of a member having a predetermined rigidity so as to achieve the function to support, and a member having a predetermined elasticity so as to function to buffer the shock. For example, a resin member such as polypropylene is suitable as the impact absorbing member 4. The shock absorbing member 4 includes an upper plate 41, a front plate 42, and a lower plate 43. As shown in FIGS. 4 and 5, the opening 4H opened rearward in the cross section along the front-rear direction of the vehicle 1. It has a U-shaped cross-sectional shape. The front and rear widths of the upper plate 41 and the lower plate 43 and the vertical width of the front plate 42 are approximately the same length. 14A and 15A show perspective views of the shock absorbing member 4 alone.

  The upper plate 41 extends horizontally in the front-rear direction, faces the lower surface of the upper bracket 162, and has a support portion 411 that supports the fascia upper end plate 16. The support portion 411 is a rear portion of the upper plate 41 and supports a flat plate portion that is lowered by one step in the upper bracket 162. As shown in FIGS. 14A and 15A, the support portion 411 is formed with a fixing hole 413 that penetrates in the vertical direction. The upper bracket 162 and the upper plate 41 are integrally connected by screw fixing (not shown) through the fixing hole 413 with a cover member 5 described later interposed therebetween.

  The front plate 42 extends vertically so as to connect the front edges of the upper plate 41 and the lower plate 43. The arrangement position of the front plate 42 is a position near and behind the parting line P. The front plate 42 includes an upper portion 42A that generally occupies the upper half and a lower portion 42B that occupies the lower half. The shock absorbing member 4 is assembled to the first recess 33 so that the lower portion 42B is in contact with the flange plate 35 in the front-rear direction. On the other hand, the upper portion 42A does not overlap the flange plate 35 in the front-rear direction and is not restrained by the flange plate 35.

  A fastening hole 421 (fixing portion) that penetrates the front plate 42 in the front-rear direction is formed in the lower portion 42B of the front plate 42. At the position of the fastening hole 421, the shock absorbing member 4 is fixed to the first recess 33 (flange plate 35). That is, the fixing portion of the shock absorbing member 4 to the grill bracket 3 is disposed below the support portion 411 that supports the fascia upper end plate 16. As shown in FIG. 5, the fixing portion is disposed above the flat portion 31 of the grill bracket 3 by a distance d1.

  In a state where the fastening hole 421 and the first fastening hole 352 of the flange plate 35 are aligned, the second fixing screw 62 is inserted through these holes in the front-rear direction. The second fixing screw 62 has a screw head 621 that abuts against the front surface of the flange plate 35 and a tip 622 that has entered the U-shaped space of the shock absorbing member 4. Is concluded.

  The lower plate 43 extends rearward from the lower end of the front plate 42. The lower plate 43 extends rearward in parallel with the bottom plate of the first recess 33 and has substantially the same length in the front-rear direction as the bottom plate. In a state where the shock absorbing member 4 is fixed to the flange plate 35 by the second fixing screw 62, there is a slight gap between the lower plate 43 and the bottom plate of the first recess 33.

  The cover member 5 is a member that covers the open portion 4H opened rearward of the shock absorbing member 4 having a U-shaped cross section. FIG. 12 shows a perspective view of the cover member 5 alone. The cover member 5 is a member formed of rubber or resin, and has an L-shaped cross section including a vertical plate 51 extending in the vertical direction and a horizontal plate 52 extending in the horizontal direction forward from the upper end of the vertical plate 51. It is. The vertical plate 51 has a vertical length that is slightly shorter than the vertical width of the opening 4H. For this reason, a short gap is formed between the lower edge of the vertical plate 51 and the bottom plate of the first recess 33. The horizontal plate 52 is fixed by being sandwiched between the upper plate 41 (support portion 411) of the shock absorbing member 4 and the upper bracket 162 of the fascia upper end plate 16. When the vertical plate 51 covers the open portion 4H, the tip 622 of the second fixing screw 62 is not exposed, and the appearance can be improved.

<Cross-sectional structure of the direct connection between the grill bracket and bumper fascia>
In the above description, the cross-sectional structure of the portion where the grill bracket 3 is connected to the fascia upper end plate 16 of the bumper fascia 12 via the shock absorbing member 4 has been described. The grill bracket 3 also has a portion that is directly connected to the bumper fascia 12. The direct connection portion is below the connection position between the fascia upper end plate 16 and the shock absorbing member 4. This cross-sectional structure will be described with reference to FIG. FIG. 6 is a schematic cross-sectional view of a position shifted by a predetermined distance in the vehicle width direction from the cross-sectional position of FIGS. 4 and 5.

  The front grill 13 has a grill upper end plate 131 that extends in the horizontal direction from the upper end to the rear. The lower bracket 164 formed at the lower front end of the fascia upper end plate 16 is fixedly supported by a recess provided at the front end of the grill upper end plate 131. That is, the front grill 13 and the fascia upper end plate 16 are an integral member. At the rear end of the grill upper end plate 131, a grill flange 132 (opposing plate) rising vertically upward is provided. The grill flange 132 faces the flange plate 35 of the grill bracket 30.

  The flange plate 35 has a second fastening hole 353 that passes through the flange plate 35 in the front-rear direction. The second fastening hole 353 is a screw hole serving as a mounting portion for the grill flange 132. The grill flange 132 has a screw hole 133 at a position corresponding to the second fastening hole 353. A third fixing screw 63 is inserted through these holes 353 and 133 in the front-rear direction. The third fixing screw 63 fastens the grill flange 132 and the flange plate 35 with the screw head 631 contacting the front surface of the grill flange 132 and the tip 632 entering the U-shaped space of the shock absorbing member 4. doing. The shock absorbing member 4 is provided with a receiving hole 422 that allows the tip 632 side of the third fixing screw 63 to escape.

  As shown in FIG. 6, the attachment portion where the flange plate 35 is attached to the grill flange 132 is disposed above the flat portion 31 of the grill bracket 3 by a distance d2. Further, since the grill bracket 3 is connected to the shroud upper member 22 at the rear end 311 which is a part of the flat portion 31, the attachment portion is positioned above the connection portion by a distance d2. . Furthermore, the distance d2 and the distance d1 shown in FIG. 5 are substantially the same length. That is, the attachment portion (second fastening hole 353) and the fixing portion (fastening hole 421) to which the shock absorbing member 4 is fixed to the flange plate 35 are disposed at substantially the same height position.

<Cross-section structure of access space>
FIG. 7 is a schematic cross-sectional view taken along the line VII-VII in FIG. Referring also to FIG. 13, the grill bracket 3 has a notch 36 at the center in the left-right direction. The flat portion 31 is divided into left and right by the cutout portion 36. A flat central portion 37 is formed in front of the notch 36. The central portion 37 is a horizontal surface that is slightly higher than the flat portion 31, and the concave portion 32 is divided into right and left by the central portion 37. The lower surface of the central portion 37 is supported by the support piece 7.

  Referring also to FIGS. 14A to 15B, the central portion 44 in the left-right direction of the shock absorbing member 4 is provided with a standing wall portion 45 and a housing portion 46. The standing wall portion 45 is an inclined wall extending between the upper bracket 162 of the fascia upper end plate 16 and the center portion 37 of the grill bracket. The standing wall portion 45 includes a swash plate 451, an upper horizontal plate 452 extending forward from the upper end of the swash plate 451, and a lower horizontal plate 453 extending forward and backward from the lower end of the swash plate 451. The swash plate 451 has a back-lowering slope in which the upper end portion is positioned forward and the lower end portion is positioned rearward. The upper horizontal plate 452 supports the upper bracket 162, and the lower horizontal plate 453 is in contact with the central portion 37.

  The accommodating portion 46 is a portion integrally bulged on the standing wall portion 45 below the front side of the standing wall portion 45 (below the upper horizontal plate 452). The accommodating portion 46 forms an accommodating space for accommodating the second fixing screw 62 for fixing the shock absorbing member 4 and the flange plate 35 in the central portion 44, and has a box shape having an opening on the lower surface. ing. That is, the lower horizontal plate 453 does not exist on the lower surface of the accommodating portion 46. An insertion hole 461 into which the second fixing screw 62 is screwed is provided on the front wall of the housing portion 46. By providing such an accommodation portion 46, it is possible to prevent contact with the second fixing screw 62 when a user who intends to open the hood 11 inserts his / her finger into the access space AS.

  A slit 47 that is long in the left-right direction is formed near the upper end of the swash plate 451. The slit 47 is provided to adjust so that the rigidity of the standing wall portion 45 does not become too high. By forming the slit 47, the mechanical strength of the standing wall portion 45 is weakened, and an appropriate shock absorbing function can be applied to the standing wall portion 45. A slit cover 53 made of a member having a lower elasticity than the shock absorbing member 4 is fitted into the slit 47.

[External structure of vehicle front]
Next, the external structure of the front portion 10 of the vehicle 1 will be described. 8 is a plan view of the front portion 10 in a top view, FIG. 9 is a top view in which the front grill 13 is removed from the state of FIG. 8, and FIG. 10 is a plan view of the grill bracket 3, the shock absorbing member 4 and the It is the top view which removed the assembly of the cover member 5. FIG.

  The grill bracket 3 has a lateral width substantially corresponding to the vehicle width of the vehicle 1, a rear portion 3 </ b> A thereof overlaps with the shroud upper member 22, and a front portion 3 </ b> B is adjacent to the front grill 13. As described above, the notch 36 formed by notching a part of the plane portion 31 is provided at the center in the left-right direction of the grill bracket 3. The notch 36 is provided to form a space for accommodating the latch unit 19 that forms an engagement support structure for the front edge 11F of the bonnet 11. An opening is also provided in the shroud upper member 22 at a position corresponding to the notch 36.

  As shown in FIG. 10, the support piece 7 is made of a highly rigid plate-like member having a predetermined width in the left-right direction, and is arranged at the center in the left-right direction. The lower end of the support piece 7 is supported by a bumper rain 18 whose left and right end portions are held by the front side frame 17, and the upper end is in contact with and fixed to the lower surface of the central portion 37 of the grill bracket 3. In the grill bracket 3, a portion where the notch 36 is provided is a mechanically fragile portion. However, the support rigidity of the bumper fascia 12 can be ensured by adopting a structure in which the central portion 37 positioned in front of the notch 36 is supported by the support piece 7.

  As shown in FIGS. 8 and 9, the flange plate 35 and the recess 32 of the grill bracket 30 are gently curved in the left-right direction along the curved shape of the front portion 10. The central portion 37 divides the concave portion 32 at the center in the left-right direction. Of the recess 32, only the second recess 34 is exposed upward. The first recess 33 is completely covered by placing the shock absorbing member 4 and the cover member 5 that are curved according to the curved shape of the recess 32.

  FIG. 11 is a perspective view of an assembly of the grill bracket 3, the impact absorbing member 4 and the cover member 5, and FIG. 12 is an exploded perspective view of the assembly. FIG. 13 is a perspective view of the grill bracket 3 alone with the perspective direction reversed from FIG. FIG. 14A is a perspective view of the shock absorbing member 4 alone as viewed obliquely from the front, and FIG. 14B is an enlarged perspective view of the main part of FIG. 14A. FIG. 15A is a perspective view of the shock absorbing member 4 alone viewed obliquely from the rear, and FIG. 15B is an enlarged perspective view of a main part of FIG. 15A.

<Grill bracket>
FIG. 11 shows an example in which six second fixing screws 62 are screwed to the flange plate 35 at intervals in the left-right direction. The flange plate 35 and the front plate 42 of the shock absorbing member 4 are fixed by these second fixing screws 62. Further, an example is shown in which six second fastening holes 353 serving as attachment portions of the flange plate 35 to the grill flange 132 are arranged at substantially equal intervals in the left-right direction. From the front surface of the flange plate 35, a pin 354 is provided so as to protrude forward. The pin 354 is for fitting into a receiving hole provided in the grill flange 132 and positioning the flange plate 35 and the grill flange 132 before fastening the third fixing screw 63.

  The screw hole 313 used as the connection part to the shroud upper member 22 has shown the example provided with two in the rear-end part 311 so that the notch part 36 may be pinched | interposed. A screw hole 314 for securing the holding frame of the shroud 2 and the grill bracket 3 is provided near the side end portion 38 of the flat portion 31.

  The lateral width of the recess 32 is slightly shorter than the lateral width of the grill bracket 30. For this reason, the side edge part 38 in which the hollow of the recessed part 32 does not exist is provided in the right-and-left both ends of the front part 3B. Accordingly, the shock absorbing member 4 and the cover member 5 are members that are placed in the first concave portion 33 of the concave portion 32, so that the left and right widths thereof are also set to be shorter than the left and right widths of the grill bracket 30. ing.

  Referring to FIG. 13, the first recess 33 has a substantially uniform width in the front-rear direction, and the height of the bottom plate is slightly depressed from the central portion 37. On the other hand, the width of the second recess 34 in the front-rear direction is wide in the vicinity of the left and right end portions. Further, the height of the bottom plate of the second recess 34 is recessed to such an extent that a considerable step is formed with respect to the central portion 37. The drain hole 341 is disposed near the left and right wide portions.

<Shock absorbing member>
The shock absorbing member 4 includes a pair of left and right U-shaped cross sections composed of an upper plate 41, a front plate 42, and a lower plate 43, and a central portion 44 in the middle of these U-shaped portions. It is. The upper plate 41 is provided with a plurality of fixing holes 413 for fixing the shock absorbing member 4 to the fascia upper end plate 16. The front plate 42 is provided with a plurality of fastening holes 421 for fixing the shock absorbing member 4 to the grill bracket 3 and receiving holes 422 for releasing the third fixing screw 63 for fastening the grill flange 132 and the flange plate 35. ing.

  The lower plate 43 includes a receiving concave portion 441 at a location where the central portion 44 exists. The receiving recess 441 is a portion protruding upward from the other portion of the lower plate 43, and is a portion into which the central portion 37 of the grill bracket 30 is fitted. That is, the central portion 37 is a portion that protrudes slightly above the bottom plate of the first recess 33 (FIG. 13), and the receiving recess 441 that is recessed upward so as to fit into the protrusion is formed on the lower plate 43. Is provided. Therefore, the portion of the receiving recess 441 becomes a portion supported by the support piece 7 via the central portion 37. The lateral widths of the receiving recess 441, the central portion 37, and the support piece 7 are substantially the same.

  A pair of partition plates 412 are disposed on the left and right ends of the standing wall 45 above the receiving recess 441. The partition plate 412 is a plate member that is orthogonal to the front plate 42 and extends in the vertical direction. The upper end is the upper plate 41 and the upper horizontal plate 452, the lower end is the lower plate 43 and the lower horizontal plate 453, and the front end is the front plate 42. It is connected. That is, the pair of partition plates 412 sandwich the upright wall portion 45 in the left-right direction, and partition the central portion 37 and the U-shaped portion. In relation to the support piece 7, the arrangement position of the pair of partition plates 412 is within the width in the left-right direction of the support piece 7 and in the vicinity of the position corresponding to the upper part of the left-right direction end.

  The partition plate 412 serves to reinforce the mechanical strength of the shock absorbing member 4 at the central portion 44. As described above, in the grill bracket 3, the central portion 37 is mechanically fragile due to the formation of the notch portion 36, so that the central portion 37 is supported by the support piece 7. By providing the receiving recess 441 in which the pair of partition plates 412 are erected on the central portion 37, the support rigidity of the bumper fascia 12 in the shock absorbing member 4 itself is enhanced. Moreover, although the slit 47 is provided in the standing wall part 45 and it is weakening actively, the pair of partition plates 412 reinforces the fall of the support rigidity of the center part 44 by this.

  As shown in FIGS. 15A and 15B, the shock absorbing member 4 includes a plurality of reinforcing ribs 48 inside the U-shaped portion. The reinforcing rib 48 is a triangular plate member that connects the front plate 42 and the upper plate 41, and is disposed in a direction orthogonal to the front plate 42. On the other hand, the lower end 481 of the reinforcing rib 48 is disposed at a position separated from the lower plate 43 by a predetermined distance.

  The strength of the U-shaped portion is reinforced by the reinforcing rib 48, and the support rigidity of the bumper fascia by the shock absorbing member 4 can be increased. On the other hand, if a plurality of ribs that connect the upper plate 41 and the lower plate 43 such as the partition plate 412 are arranged inside the U-shaped portion, the strength is excessively increased, and the vertical direction by the shock absorbing member 4 is increased. Reduces shock absorption capacity. Therefore, by separating the lower end 481 of the reinforcing rib 48 from the lower plate 43, the shock absorbing capacity is not greatly reduced.

<Cover member>
The cover member 5 is prepared as a pair on the left and right sides so as to cover the open portions 4H of the U-shaped portions on the left and right sides of the central portion 44 of the shock absorbing member 4, respectively. The slit cover 53 has a shape that is long in the left-right direction according to the slit 47 of the standing wall 45, and includes a hook that engages with a wall surface that defines the slit 47. The vertical plate 51 of the cover member 5 covers the opening 4H, so that the appearance can be improved as described above, and water and dust enter the space of the U-shaped portion from the opening 4H. Can be prevented. Thereby, the durability of the shock absorbing member can be enhanced.

  Note that, in terms of the rigidity relationship among the grill bracket 3, the shock absorbing member 4 and the cover member 5, the shock absorbing member 4 has a lower rigidity characteristic than the grill bracket 3, and the cover member 5 has a lower rigidity than the shock absorbing member 4. Has characteristics. The reason why the cover member 5 has the lowest rigidity is to prevent the deformation operation of the shock absorbing member 4 from being hindered.

[Function and effect]
The vehicle front structure according to the present embodiment described above has the following operational effects. First, the fascia upper end plate 16 of the bumper fascia 12 and the shroud upper member 22 are connected by a composite of the grill bracket 3 and the shock absorbing member 4 instead of the high-rigidity grill bracket 3 alone. That is, the fascia upper end plate 16 is supported by the shroud 2 via the composite body of the grill bracket 3 and the impact absorbing member 4. Therefore, drooping due to the weight of the bumper fascia 12 can be suppressed. Further, an impact absorbing member 4 is interposed between the fascia upper end plate 16 and the grill bracket 3, and the fascia upper end plate 16 is supported by the impact absorbing member 4. For this reason, even if a vertical impact such as a pedestrian head impact is applied to the fascia upper end plate 16, the impact absorbing member 4 can buffer the impact. Therefore, it contributes to pedestrian head protection.

  Further, a recess 32 is formed in the front portion 3B of the grill bracket 3. For this reason, the rigidity in the left-right direction of the grill bracket 3 long in the left-right (vehicle width) direction can be increased. Moreover, the space | interval of the up-down direction between the grill bracket 3 and the fascia upper end board 16 can be taken as much as the recessed part 32 is dented below.

  For example, in FIG. 5, assuming that the flat portion 31 extends to the front portion 3 </ b> B, the gap between the grill bracket 3 and the fascia upper end plate 16 is shortened by the amount that the first recess 33 is not recessed. In this case, the space where the shock absorbing member 4 can be arranged is also reduced, and the vertical width of the shock absorbing member 4 is also shortened. Therefore, when an impact load is applied to the fascia upper end plate 16, it is assumed that a sufficient stroke cannot be taken to cause the impact absorbing member 4 to be elastically deformed. On the other hand, in this embodiment, since the shock absorbing member 4 is placed in the concave portion 32 (first concave portion 33), the length of the shock absorbing member 4 in the vertical direction can be increased, and the stroke can be increased. It becomes possible to take enough.

  As shown in FIG. 5, the fastening hole 421 (second fixing screw 62) serving as a fixing portion of the shock absorbing member 4 to the grill bracket 3 is disposed above the flat portion 31 of the grill bracket 3 by a distance d1. ing. The grill bracket 3 is fixed to the shroud upper member 22 at the rear end portion 311 at the same height level as the flat portion 31. As described above, by disposing the fixing portion above the flat portion 31, it is possible to form a moment that can be supported with high rigidity with respect to a load applied downward to the front portion 3 </ b> B of the grill bracket 3. .

  The shock absorbing member 4 includes an upper plate 41, a front plate 42, and a lower plate 43, and has a U-shape that is opened rearward. The upper plate 41 supports the upper bracket 162 of the fascia upper end plate 16, and the front plate 42 is fixed to the front portion 3B (flange plate 35) of the grill bracket 3. Thus, by setting it as the structure which does not comprise a standing wall in the back, the upper board 41 becomes easy to deform | transform downward and the impact-absorbing member 4 becomes easily deformable. Further, since the upper plate 41 receives a load from the fascia upper end plate 16 and the front plate 42 is fixed to the grill bracket 3, the shock absorbing member 4 absorbs an impact applied from the top to the bottom. easy.

  The front plate 42 of the shock absorbing member 4 is located near and behind the parting line P formed by the fascia upper end plate 16 and the front edge 11F of the bonnet 11. The self-weight load of the bonnet 11 is transmitted to the upper bracket 162 in the vicinity of the parting line P. The same applies when an impact load is applied to the bonnet 11. By arranging the front plate 42 made of a vertical wall extending in the vertical direction in the vicinity and rear of the parting line P, not only the load of the bumper fascia 12 but also the load of the bonnet 11 is good in the shock absorbing member 4. Can take it. Therefore, not only the drooping of the bumper fascia 12 but also the drooping of the bonnet 11 can be satisfactorily suppressed.

  Further, the front plate 42 of the shock absorbing member 4 overlaps the flange plate 35 of the grill bracket 3 in the front-rear direction, the lower plate 42B fixed by the flange plate 35 and the second fixing screw 62, and the flange plate 35 in the front-rear direction. And an upper portion 42A that does not overlap. For this reason, the upper part 42 </ b> A having a vertical width corresponding to approximately the upper half of the front plate 42 can be used as a part for causing elastic deformation when a load is applied to the bumper fascia 12.

  Referring to FIG. 5, when an impact load is applied to fascia upper end plate 16 or front edge 11 </ b> F of bonnet 11, the load is transmitted from upper bracket 162 to upper plate 41 of impact absorbing member 4. At this time, since there is no standing wall in the rear opening 4H, the shock absorbing member 4 is deformed so that the rear end of the upper plate 41 sinks downward. It is the corner portions of the front plate 42 and the upper plate 41 and the upper portion 42A of the front plate 42 that mainly bear this deformation. In the present embodiment, the deformation stroke of the upper plate 41 can be increased due to the presence of the upper portion 42A. This point will be described with reference to FIGS. 16A and 16B.

  FIG. 16A is a cross-sectional view illustrating a comparative example of a fixing structure between the grill bracket 3 and the shock absorbing member 4. Although this comparative example is also an embodiment of the present invention, the vertical width of the flange plate 35A of the grill bracket 3 is substantially equal to the front plate 42 of the shock absorbing member 4, and the front plate 42 is provided on such flange plate 35A. Are arranged and fixed so as to overlap in the front-rear direction. In this case, the front plate 42 is restrained by the flange plate 35A and cannot be deformed, and only the corners of the front plate 42 and the upper plate 41 can be deformed exclusively. For this reason, the deformation stroke of the upper plate 41 is small.

  FIG. 16B is a cross-sectional view showing a fixing structure between the grill bracket 3 and the shock absorbing member 4 of the present embodiment. As described above, the front plate 42 includes an upper portion 42A that does not overlap the flange plate 35, and the upper portion 42A is elastically deformable. That is, since the region C1 extending from the corner between the front plate 42 and the upper plate 41 to the upper edge 351 of the flange plate 35 can be deformed in the front plate 42, the rear end of the upper plate 41 is lowered in the arrow C2 direction. Stroke can be increased. Therefore, the shock absorbing member 4 can perform good shock absorption.

  Further, as shown in FIG. 5, the front plate 42 and the flange plate 35 are arranged so as to overlap in the front-rear direction, so that the insertion direction of the second fixing screw 62 that fixes both is also directed in the front-rear direction. For this reason, assuming that the head of the pedestrian heads from the top to the bottom with respect to the fascia upper end plate 16, a structure in which the tip 622 of the second fixing screw 62 is not directed upward can be provided.

  As shown in FIG. 6, the bumper fascia 12 has a grill flange 132, and the grill flange 132 is attached with a third fixing screw 63 using the second fastening hole 353 of the flange plate 35. Thus, the support state of the bumper fascia 12 can be stabilized by further providing a portion in which the grill bracket 3 is directly attached to the bumper fascia 12 without using the shock absorbing member 4.

  Further, the second fastening hole 353 of the flange plate 35 serving as a mounting portion to the grill flange 132 is disposed at substantially the same height as the fastening hole 421 serving as a fixing portion of the shock absorbing member 4 to the flange plate 35. . For this reason, even when the configuration in which the grill flange 132 and the flange plate 35 including the shock absorbing member 4 are fastened by the third fixing screw 63 in the second fastening hole 353 is adopted (in the above embodiment, the receiving hole 422, the tip 632 side of the third fixing screw 63 is released), and the deformation stroke of the front plate 42 is not reduced.

  Further, the mounting portion using the second fastening hole 353 is disposed at a position higher than the position where the rear end portion 311 of the grill bracket 3 is connected to the shroud upper member 22 by the first fixing screw 61 by a distance d2. . For this reason, it is possible to form a moment that can be supported with high rigidity with respect to a load applied downward to the front portion 3B (the flange plate 35 and the first recess 33) of the grill bracket 3.

[Description of Modified Embodiment]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, The following modified embodiment can be taken.

  (1) In the above embodiment, the example in which the concave portion 32 of the grill bracket 3 is configured in two stages of the first concave portion 33 and the second concave portion 34 having different concave depths has been described. The recess 32 may be a simple one-step recess. FIG. 17A is a cross-sectional view showing a fixing structure between the grill bracket 30 and the shock absorbing member 4 according to a modified embodiment. The grill bracket 30 includes a concave portion 320 formed of a single-step depression. The front wall of the recess 320 is a flange plate 350. A symbol T in the drawing indicates a mounting surface of the fascia upper end plate 16. In this modified embodiment, the space C3 between the attachment surface T and the bottom plate of the recess 320 can be used as a space for disposing the shock absorbing member 4.

  In contrast, FIG. 17B is a cross-sectional view showing a fixing structure between the grill bracket 30A and the shock absorbing member 40 according to the comparative example. The grill bracket 30A is made of a flat plate-like member that does not have a recess, and includes a flange plate 35A at the front end. In this comparative example, an interval C4 between the attachment surface T and the grill bracket 30A is an arrangement space for the shock absorbing member 40. Since the interval C4 is shorter than the interval C3 by the amount of the concave portion 320, the vertical width of the shock absorbing member 40 is also reduced. Therefore, the shock absorbing member 40 has a small deformation stroke. The height position of the grill bracket is often determined by other members such as the shroud 2, and this embodiment is useful when the vertical distance of the grill bracket relative to the mounting surface T cannot be sufficiently obtained.

  (2) In the above embodiment, the example in which the rear end 311 of the grill bracket 3 is fixed to the shroud upper member 22 has been described. Instead of this, the rear end 311 may be attached to the shroud panel 21.

  (3) In the above embodiment, the example in which the fastening hole 421 serving as the fixing portion for the shock absorbing member 4 to the grill bracket 3 (flange plate 35) is arranged in the front plate 42 has been described. Instead of this, screw holes corresponding to the fastening holes 421 may be arranged in the lower plate 43. That is, the lower plate 43 may be fixed to the first recess 33 of the grill bracket 3.

  (4) In the said embodiment, the aspect in which the impact-absorbing member 4 has a cross-sectional U-shape comprised with the upper board 41, the front board 42, and the lower board 43 was shown. This is an example, and the shock absorbing member 4 is lower in rigidity than the grill bracket 3, and has a support portion that supports the upper end portion of the bumper fascia 12, and is positioned below the support portion and fixed to a part of the grill bracket 3. As long as it has a fixed part, the shape is not limited. For example, it may be a tube-shaped shock absorbing member 4 having a square or circular cross section. A sponge-like impact absorbing member 4 may be used.

DESCRIPTION OF SYMBOLS 1 Vehicle 10 Front part 11 Bonnet 11F Front edge 12 Bumper fascia 13 Front grille 132 Grille flange (opposite plate)
16 Facia top plate (top end of bumper fascia)
2 Shroud 3 Grill bracket (connection member)
3A Rear part 3A
3B Front part 3B
31 Flat part 32 Recess 33 First recess 34 Second recess 35 Flange plate 353 Second fastening hole (attachment part)
341 Drainage hole 4 Shock absorbing member 4H Opening portion 41, 42, 43 Upper plate, front plate, lower plate 411 Support portion 42A, 42B Upper portion, lower portion 421 Fastening hole (fixing portion)
5 Cover members

Claims (7)

A bumper fascia disposed at the front of the vehicle and having an upper end facing the front edge of the bonnet;
A shroud that is arranged behind the bumper fascia and guides cooling air to predetermined equipment;
A connecting member for connecting the shroud and the upper end portion of the bumper fascia;
An impact absorbing member interposed between an upper end portion of the bumper fascia and the connecting member,
The connecting member is
A rear portion having a plane portion extending in the vehicle width direction and a connecting portion connected to the shroud;
A front portion that is located below the upper end portion of the bumper fascia, is recessed below the flat portion, and has a recess extending in the vehicle width direction,
The shock absorbing member is a vehicle front structure including a support portion that is disposed on the recess and supports an upper end portion of the bumper fascia, and a fixing portion for the connecting member. The vehicle front structure according to claim 1,
The front part structure of the vehicle, wherein the fixing part of the shock absorbing member to the connecting member is disposed above the flat part. The vehicle front structure according to claim 2,
The front portion of the connecting member includes a flange plate extending upward;
The shock absorbing member includes a front plate facing the flange plate,
The front plate is
A lower part that is arranged to overlap the flange plate in the front-rear direction, and forms the fixing part;
A vehicle front structure including the flange plate and an upper portion that does not overlap in the front-rear direction. In the vehicle front structure according to claim 3,
The bumper fascia has a counter plate facing the flange plate of the connecting member,
The flange plate has a mounting portion for the counter plate,
The mounting portion is a vehicle front structure that is disposed at substantially the same height as the fixed portion of the shock absorbing member. In the vehicle front structure according to claim 1 or 2,
The impact absorbing member includes a top plate, a front plate, and a lower plate in a cross section along the front-rear direction of the vehicle, and has a U-shape that is open toward the rear,
The support portion is disposed on the upper plate,
The said fixing | fixed part is a front part structure of the vehicle arrange | positioned at the said front board or the said lower board. In the vehicle front structure according to any one of claims 1 to 5,
The recess is
A first recess in which the shock absorbing member is placed;
A front structure of a vehicle, comprising: a second recessed portion provided continuously behind the first recessed portion and recessed below the first recessed portion. The vehicle front structure according to claim 6,
A front structure of a vehicle, wherein the second recess has a function of a water drainage channel that enters from a gap between an upper end portion of the bumper fascia and a front edge of the bonnet.

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