JP6044562B2 - Lower body structure of the vehicle - Google Patents

Description

  The present invention relates to a vehicle body lower structure of a vehicle, and more particularly to a vehicle having a side sill in which a tie-down hole with which a tie-down hook is engaged is formed.

  2. Description of the Related Art Conventionally, a tie-down hole for fixing a vehicle when transported by various transport means such as a trailer, a railway freight car, and a transport ship is provided at the lower part of the vehicle body.

  An example of such a vehicle is disclosed in Patent Document 1. In the vehicle of this Patent Document 1, side sills extending in the vehicle front-rear direction are disposed on the left and right sides of the floor panel, and the lower surface of the floor panel is joined to the upper surface thereof. A cross member extending in the vehicle width direction is disposed on the lower surface of the floor panel, and an end of the cross member is joined to a side sill. A rear side frame extending in the vehicle front-rear direction is disposed inside the side sill in the vehicle width direction, and the rear side frame is joined to the lower surface of the floor panel. The rear side frame has a vertical width smaller than that of the side sill, and its bottom wall is located above the lower end of the side sill. A semicircular cutout is formed at a corner formed by a curved portion of the rear side frame of the rear side frame and a side sill in the bottom wall of the rear side frame. A tie-down bracket in which a tie-down hole for engaging a tie-down hook is formed on the bottom wall is fitted and fixed to the notch.

Japanese Patent Laid-Open No. 10-76978

  However, in the vehicle of Patent Document 1, when the tie-down hook is locked to the tie-down hole, the tie-down hook is passed through the vehicle body from the outside in the vehicle width direction and locked to the tie-down hole. At that time, the side sill is arranged on the outer side in the vehicle width direction of the tie-down bracket, that is, on the front side for the operator, and the operator has to pass the tie-down hook under the side sill and lock it. Locking operation becomes difficult.

  Therefore, it is conceivable that the tie-down hole is not provided on the rear side frame side but on the side sill on the front side. In that case, it is necessary to suppress the deformation of the side sill due to the locking of the tie-down hook, and it is necessary to balance the improvement of the rigidity of the side sill with respect to the vehicle side collision and the load path due to the vehicle side collision. On the other hand, if a reinforcing member or the like is provided, the number of parts, weight, and cost increase.

  The present invention has been made in view of such points, and the object of the present invention is to improve the rigidity of the side sill while suppressing the number of parts in the vehicle body lower structure in which the tie-down hole is provided in the side sill. The purpose is to achieve a balance with securing a load path at the time of a vehicle side collision.

  In order to achieve the above object, according to the present invention, a partition member for partitioning the inside of the side sill in the vehicle front-rear direction is provided, and the partition member is joined to the cross member via the side sill.

  Specifically, the present invention includes a pair of side sills extending in the vehicle front-rear direction, and a floor panel that connects the pair of side sills to form a floor surface of the passenger compartment, and the front floor panel of the floor panel includes: At the boundary between the rear floor panel and the rear floor panel of the vehicle, a kick-up portion that is stepped up is formed at the rear of the vehicle. The pair of rear side frames extends in the vehicle front-rear direction, and a cross member extending in the vehicle width direction connects the pair of side sills behind the kick-up portion, and the front end portion of each rear side frame includes The following solution was taken for the lower body structure of the vehicle connected to the inside of the side sills in the vehicle width direction.

  That is, in the first invention, each side sill has a closed cross-sectional shape, and a tie-down hole to which a tie-down hook is locked is formed on the bottom wall portion, and the tie-down on the bottom wall portion is formed. A reinforcing member that reinforces the periphery of the tie-down hole is provided in the periphery of the hole, and a partition member that extends upward from the reinforcing member and partitions the inside of the side sill in the vehicle front-rear direction is provided in the side sill, The partition member is joined to the cross member-corresponding portion of the inner side surface of the side sill.

  According to the first invention, since the tie-down hook is locked to the reinforcing member provided on the bottom wall portion of the side sill, the deformation of the side sill due to the locking of the tie-down hook can be suppressed.

  In addition, according to the first invention, since the partition member extending from the reinforcing member partitions the inside of the side sill in the vehicle front-rear direction, the rigidity of the side sill having a closed cross-sectional shape is further increased. Accordingly, the rigidity of the side sill against the vehicle side collision is improved. In addition, since the partition member is joined to the cross member via the side sill, the collision load at the time of the vehicle-side collision acts on the inner partition member from the side sill, and further, the vehicle width direction of the side sill from this partition member It acts on the inner part and is transmitted to the cross member. Therefore, it is possible to secure a road path at the time of a vehicle side collision.

  As described above, according to the first aspect of the present invention, it is possible to achieve both the improvement of the rigidity of the side sill and the maintenance of the load path at the time of the vehicle side collision while suppressing the number of parts by one member including the reinforcing member and the partition member. it can.

  According to a second aspect, in the first aspect, the partition member is formed with a rib extending in the vehicle width direction.

  According to the second invention, the collision load acts on the partition member in the side sill at the time of the vehicle side collision. At this time, the rib that extends in the vehicle width direction is formed on the partition member. It is efficiently transmitted to the inside in the vehicle width direction through the rib. Therefore, the collision load at the time of the vehicle side collision can be more reliably transmitted to the cross member.

  According to a third invention, in the second invention, a joining piece to be joined to the cross member-corresponding portion of the inner peripheral surface of the side sill is formed at the inner end in the vehicle width direction of the partition member, It is characterized by extending toward the joining piece.

  According to the third invention, a collision load acts on the partition member in the side sill at the time of a vehicle side collision. Since it extends, the collision load is transmitted to this joining piece. And since this joining piece is joined to the site | part corresponding to the cross member in the internal peripheral surface of a side sill, the collision load transmitted to the joining piece along the rib is efficiently transmitted to a cross member. Therefore, the collision load at the time of the vehicle side collision can be transmitted more reliably by the cross member.

  As described above, according to the present invention, it is possible to achieve both the reinforcement of the side sill tie-down hole and the load path at the time of a vehicle-side collision while suppressing the number of parts.

It is a bottom view showing the appearance of the back of the vehicle in the vehicle body lower part structure according to the embodiment of the present invention. It is the II section enlarged view of FIG. It is a perspective view which shows the vehicle body lower part structure of the vehicle which concerns on embodiment. FIG. 3 is a view corresponding to FIG. 2 in a state where a rear side frame is removed. It is the VV sectional view taken on the line of FIG. It is a side view of the vehicle body lower part structure of a vehicle in the state where a frame side outer panel and a side sill outer were removed. It is a figure which shows a reinforcement bracket, Comprising: (a) is a top view, (b) is a front view, (c) is a side view. It is a figure which shows the positional relationship of a reinforcement bracket, a floor panel, and a cross member. FIG. 7 is a view corresponding to FIG. 6 illustrating a vehicle body lower part structure according to a modification of the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the following description of preferable embodiment is only an illustration essentially, and is not intending restrict | limiting this invention, its application thing, or its use.

  FIG. 1 is a bottom view showing an appearance of the vehicle rear side of the vehicle body lower structure of the vehicle 1, and FIG. 2 is an enlarged view of a portion II in FIG. 1. In the figure, arrows Fr and Re indicate the vehicle front-rear direction, arrow Fr indicates the vehicle front, and arrow Re indicates the vehicle rear. Furthermore, arrows R and L indicate the vehicle width direction, arrow R indicates the vehicle right direction, and arrow L indicates the vehicle left direction. Therefore, FIG. 2 shows a vehicle right side portion of the vehicle body lower structure.

  A pair of side sills 3 and 3 extending in the vehicle front-rear direction are provided at a lower portion of the vehicle body of the vehicle 1 with an interval in the vehicle width direction. A frame side outer panel 5 forming an external appearance is attached to the side surface of each side sill 3 on the outer side in the vehicle width direction. The pair of side sills 3 and 3 are connected by a floor panel 7 that forms a floor surface of a passenger compartment (not shown).

  The floor panel 7 includes a front floor panel 7a that forms a vehicle front side portion of the floor surface, and a rear floor panel 7b that is disposed behind the vehicle and forms a vehicle rear side portion of the floor surface. . A pair of rear side frames 9, 9 extend in the vehicle front-rear direction below both ends of the rear floor panel 7b in the vehicle width direction.

  A rear wheel house 11 is connected to the rear end of each side sill 3, and a knuckle 13 for supporting a wheel is provided inside the rear wheel house 11. A recess 9 a is formed in front of the rear wheel house 11 on the bottom surface of each rear side frame 9. A fixing bolt 15 for fixing the front end of the trailing arm 14 which is one of suspension suspension members is disposed in the recess 9a, and the rear end of the trailing arm 14 is connected to the knuckle 13. ing.

  FIG. 3 is a perspective view of the lower structure of the vehicle body as viewed from the upper right front. In FIG. 3, the side sill 3 is omitted.

  The rear floor panel 7b is disposed above the vehicle relative to the front floor panel 7a. At the boundary between the front floor panel 7a and the rear floor panel 7b, the rear floor panel 7b is kicked up so as to rise rearward of the vehicle. A portion 7c is formed.

  A cross member 17 extending in the vehicle width direction is disposed behind the kick-up portion 7c in the vehicle width direction. The cross member 17 includes the pair of side sills 3, 3 disposed on both sides in the vehicle width direction. Are connected. Further, at the rear side of the kick-up portion 7c, the front end portion of each rear side frame 9 is joined to the side surface in the vehicle width direction of the side sill 3 disposed on the outer side in the vehicle width direction.

  The pair of side sills 3 have substantially the same configuration. Therefore, here, the configuration of the side sill 3 on the right side of the vehicle will be described, and the description of the configuration of the side sill 3 on the left side of the vehicle will be omitted.

  FIG. 4 is a view corresponding to FIG. 2 in a state where the rear side frame 9 is removed. FIG. 5 is a cross-sectional view taken along line VV in FIG.

  The side sill 3 has a closed cross-sectional shape as shown in FIG. 5, a side sill inner 19 disposed on the inner side in the vehicle width direction, a side sill outer 21 joined to the side sill inner 19 from the outer side in the vehicle width direction, have.

  The side sill outer 21 has a hat shape in cross section, and is formed with a recess 21a that opens inward in the vehicle width direction and extends in the vehicle front-rear direction.

  The side sill outer 21 includes a vertical wall portion 21b to which the frame side outer panel 5 is bonded to an outer surface and forms a bottom portion of the concave portion 21a, and an upper wall portion 21c extending inward in the vehicle width direction from the upper end of the vertical wall portion 21b. And a bottom wall portion 21d extending inward in the vehicle width direction from the lower end of the vertical wall portion 21b. Further, an upper flange 21e projects upward from the vehicle width direction inner end of the vertical wall portion 21b, while a lower flange 21f projects downward from the vehicle width direction inner end of the bottom wall portion 21d. The upper wall portion 21c is formed with a ridge portion 21g that protrudes inward in the vehicle width direction and extends in the vehicle front-rear direction, thereby increasing the rigidity of the side sill outer 21.

  On the other hand, the side sill inner 19 is joined to the front end of the rear side frame 9. The side sill inner 19 has a hat-like cross section like the side sill outer 21, and is formed with a recess 19a that opens outward in the vehicle width direction and extends in the vehicle front-rear direction.

  The side sill inner 19 is joined to the front end portion of the rear side frame 9 and forms a bottom portion of the concave portion 19a, and an upper wall portion 19c extending outward in the vehicle width direction from the upper end of the vertical wall portion 19b. And a bottom wall portion 19d that extends outward in the vehicle width direction from the lower end of the vertical wall portion 19b and faces the upper wall portion 19c. Further, an upper flange 19e projects upward from the vehicle width direction outer end of the upper wall portion 19c, while a lower flange 19f extending in the vehicle front-rear direction from the vehicle width direction outer end of the bottom wall portion 19d is a vehicle. Projects downward. Then, the upper flange 21e and the lower flange 21f are joined to the upper flange 19e and the lower flange 19f from the outside in the vehicle width direction by welding or the like, respectively.

  As shown in FIG. 4, a tie-down hole 23 in which a tie-down hook (not shown) is locked is formed at a position corresponding to the front end of the rear floor panel 7b of the bottom wall portion 19d. The tie-down hole 23 is a long hole that is long in the vehicle front-rear direction. A reinforcing bracket 25 that reinforces the periphery of the tie-down hole 23 is provided at a position corresponding to the tie-down hole 23 in the recess 19a.

  FIG. 6 is a view of the vehicle body lower structure when the frame side outer panel 5 and the side sill outer 21 are removed as viewed from the right side of the vehicle. FIG. 7 is a view showing the reinforcing bracket 25, wherein (a) is a plan view, (b) is a front view, and (c) is a side view.

  The reinforcing bracket 25 is formed by bending a single steel plate, and is a substantially rectangular plate-shaped bracket body 27 (reinforcement) joined to a portion corresponding to the tie-down hole 23 on the bottom wall portion 19d by welding or the like. Member), a vertical plate portion 29 that rises upward from the inner end in the vehicle width direction of the bracket main body 27 and is joined by the vertical wall portion 19b welding or the like, and extends downward from the outer end in the vehicle width direction of the bracket main body 27. A bracket flange 31 joined to the lower flange 19f by welding or the like from the outside in the vehicle width direction, and a pair of partition walls that rise upward from both ends in the vehicle front-rear direction of the bracket body 27 and partition the recess 19a in the vehicle front-rear direction 33, 35 (partition members).

  The bracket body 27 is provided over the entire width direction of the bottom wall portion 19d, and a through hole 27a having substantially the same shape as the tie-down hole 23 is formed from the center in the vehicle front-rear direction to the front end portion. ing. Note that a corner of the bracket main body 27 at the front of the vehicle and in the vehicle width direction is cut out.

  The vertical plate portion 29 has a substantially trapezoidal plate shape, and the vehicle rear side portion is inclined forward of the vehicle toward the vehicle upper side.

  The bracket flange 31 has a rectangular plate shape and has substantially the same vertical width as the lower flange 19 f of the side sill inner 19.

  Of the pair of partition walls 33, 35, a rear partition wall 35 (hereinafter referred to as a rear partition wall 35) has a substantially rectangular plate shape and extends from the bracket body 27 to the upper wall portion 19c above the vehicle. It extends.

  At the upper end of the rear partition wall 35, a substantially rectangular plate-like upper joint piece 35a elongated in the vehicle width direction and joined to the upper wall portion 19c by welding or the like is formed. Further, at the inner end in the vehicle width direction of the rear partition wall 35, three inner joining pieces 35b, 35b, 35b joined to the vertical wall portion 19b by welding or the like are formed at intervals in the vehicle vertical direction. ing. The upper joint piece 35a extends from the upper end of the rear partition wall 35 so as to incline upward toward the rear of the vehicle. On the other hand, the inner joint pieces 35b, 35b, 35b are bent substantially vertically from the inner end in the vehicle width direction of the rear partition wall 35 to the rear of the vehicle. The inner joining pieces 35b, 35b, 35b have substantially the same protruding dimensions.

  The rear partition wall 35 is formed with a substantially U-shaped rib 37 that opens outward in the vehicle width direction. In FIG. 7B, only the upper end portion of the rib 37 is shown.

  On the other hand, of the pair of partition walls 33, 35, the front partition wall 33 (hereinafter referred to as the front partition wall 33) has a substantially trapezoidal plate shape as shown in FIG. The vertical width increases toward the upper side of the vehicle from the bracket body 27 to the upper wall portion 19c. Note that the lower end of the front partition wall 33 and the corner on the inner side in the vehicle width direction are cut out.

  A pair of upper joining pieces 33a, 33a joined to the upper wall portion 19c by welding or the like are formed at the upper end of the front partition wall 33 with a gap in the vehicle width direction. A pair of inner joining pieces 35b, 35b (joining pieces) joined to the vertical wall portion 19b by welding or the like are formed at the inner end in the vehicle width direction of the front partition wall 33 with a space in the vehicle vertical direction. Has been. The upper joint pieces 35a and 35a and the inner joint pieces 35b and 35b are bent substantially vertically from the end of the front partition wall 33 toward the front of the vehicle. The pair of upper joint pieces 35a, 35a have substantially the same protruding dimensions as shown in FIG. On the other hand, as shown in FIGS. 6 and 7C, the upper inner joint piece 35b of the pair of inner joint pieces 35b and 35b protrudes further forward of the vehicle than the lower inner joint piece 35b. Yes.

  Further, as shown in FIG. 7B, a substantially U-shaped rib 39 that opens outward in the vehicle width direction is formed in the front partition wall 33. The rib 39 is formed by recessing a part of the front partition wall 33 rearward of the vehicle, and an upper rib 39a (rib) extending in the vehicle width direction along the upper end of the front partition wall 33 in order from the upper side. A vertical rib 39b extending downward from the inner end in the vehicle width direction of the upper rib 39a, and a lower rib 39c (rib) extending so as to incline downward from the lower end of the vertical rib 39b toward the outer side in the vehicle width direction. , Is composed of. The upper rib 39a extends in the vehicle width direction toward the upper inner joint piece 35b, while the lower rib 39c extends in the vehicle width direction toward the lower inner joint piece 35b. ing.

  FIG. 8 is a view showing a positional relationship between the reinforcing bracket 25 and the floor panel 7 and the cross member 17. In addition, in FIG. 8, the said reinforcement bracket 25 is shown with the virtual line.

  The cross member 17 is inclined upward toward the rear of the vehicle behind the kick-up portion 7c. The front partition wall 33 of the reinforcing bracket 25 is located outside the cross member 17 in the vehicle width direction. The inner joint piece 33b on the upper side of the front partition wall 33 is joined to the center of the cross member 17 in the vehicle vertical direction on the inner peripheral surface of the vertical wall portion 19b of the side sill inner 19.

  When a collision load acts on the frame side outer panel 5 and the side sill outer 21 at the time of a vehicle-side collision, the front side partition wall 33 and the rear side partition wall 35 that partition the concave portion 19a in the vehicle front-rear direction are received. Therefore, deformation of the side sill 3 can be suppressed.

  Next, the collision load acting on the front partition wall 33 is mainly transmitted through the upper rib 39a and the lower rib 39c extending in the vehicle width direction of the rib 39, and converges on the vertical rib 39b, and the pair of upper and lower parts It acts on the inner joining pieces 33b and 33b. The collision load acts on the vertical wall portion 19b of the side sill inner 19 through the inner joint piece 33b, and acts on the cross member 17 located on the inner side in the vehicle width direction.

  Thus, the transmission path of the collision load at the time of the vehicle side collision, that is, the load path is connected to the cross member 17 having a relatively high rigidity. Accordingly, it is possible to suppress deformation of the vehicle body lower structure.

  Further, since the collision load is efficiently transmitted to the inside in the vehicle width direction by the rib 39 formed on the front partition wall 33, the deformation of the side sill 3 can be further suppressed.

  On the other hand, as shown in FIG. 4, a jack-up portion 41 where the vehicle 1 is supported by a jack (not shown) at a portion corresponding to the cross member 17 of the side sill 3, that is, a portion adjacent to the front side of the tie-down hook. Is formed.

  As shown in FIG. 6, a portion of the bottom wall portion 19d of the side sill inner 19 corresponding to the jack-up portion 41 is recessed downward with a curved surface 43 from the general surface of the upper surface of the bottom wall portion 19d. Due to the curved surface 43, the portion corresponding to the jack-up portion 41 of the lower flange 19f of the side sill inner 19 has a narrow vertical width. Therefore, the narrow portion has higher rigidity than the other portions of the lower flange 19f. Therefore, the narrow portion is supported by the jack. Thus, the jack-up portion 41 is formed by the narrow portion of the lower flange 19f.

  In the portion corresponding to the jack-up portion 41 of the bottom wall portion 19d, a bead portion 45 projecting upward from the curved surface 43 to substantially the same height as the general surface of the bottom wall portion 19d extends linearly in the vehicle width direction. It is formed as follows. By forming the bead portion 45 in this way, the rigidity of the jack-up portion 41 is further increased.

  As shown in FIG. 6, the front partition wall 33 of the reinforcing bracket 25 includes the bracket body 27, the end of the jack-up portion 41 on the side opposite to the bracket body 27, that is, the vehicle front side end of the curved surface 43. Between the two. In this way, the tie-down hole 23 is formed adjacent to the jack-up portion 41, and the peripheral portion of the tie-down hole 23 with low rigidity is reinforced by the bracket body 27 of the reinforcing bracket 25. Furthermore, by arranging the front partition wall 33 which is also a part of the reinforcing bracket 25, further reinforcement of the peripheral portion of the tie-down hole 23 and reinforcement of the jack-up portion 41 are possible.

-Effects of the embodiment of the invention-
According to the above embodiment, since the tie-down hook is locked to the bracket body 27 of the reinforcing bracket 25 provided on the bottom wall portion 19d of the side sill inner 19, the deformation of the side sill inner 19 due to the locking of the tie-down hook is prevented. Can be suppressed.

  Moreover, according to the said embodiment, since the partition walls 33 and 35 extended from the vehicle front-back direction both ends of the bracket main body 27 partition the inside of the side sill 3 in the vehicle front-back direction, the rigidity of the side sill 3 of closed cross-section shape further increases. Therefore, the rigidity of the side sill 3 with respect to the vehicle side collision is improved. In addition, since the partition walls 33 and 35 are joined to the cross member 17 via the side sill 3, the collision load at the time of the vehicle side collision acts on the partition walls 33 and 35 on the inner side in the vehicle width direction from the side sill outer 21. Furthermore, the partition walls 33 and 35 act on the side sill inner 19 to be transmitted to the cross member 17. Therefore, it is possible to secure a road path at the time of a vehicle side collision.

  Thus, according to the above embodiment, the reinforcing bracket 25, which is one member made up of the bracket body 27 and the partition walls 33 and 35, achieves both improvement in the rigidity of the side sill 3 and retention of the load path during a vehicle-side collision. be able to.

  Further, according to the above embodiment, the collision load acts on the partition walls 33 and 35 in the side sill 3 at the time of the vehicle side collision. At this time, the ribs 39a and 39c extending in the vehicle width direction are formed on the front partition wall 33. Therefore, the collision load is efficiently transmitted mainly in the vehicle width direction through the ribs 39a and 39c. Therefore, the collision load at the time of the vehicle side collision can be transmitted to the cross member 17 more reliably. Further, since the ribs 39a and 39c extend toward the inner joint pieces 33b and 33b formed at the inner end in the vehicle width direction of the front partition wall 33, the collision load is efficiently transmitted to the inner joint pieces 33b and 33b. The And since this joining piece 33b, 33b is joined to the site | part corresponding to the cross member 17 in the vertical wall part 19d of the side sill inner 19, it was transmitted to inner joining piece 33b, 33b along rib 39a, 39c. The collision load is efficiently transmitted to the cross member 17. Therefore, the collision load at the time of the vehicle side collision can be transmitted more reliably by the cross member 17.

(Modification)
FIG. 9 is a view corresponding to FIG. 6 illustrating a vehicle body lower part structure according to a modification of the embodiment.

  The reinforcing bracket 47 according to this modified example is different from the above embodiment in that it has an extension portion 49 extending from the bracket body 27 to the bead portion 45 in front of the vehicle. Since other configurations are substantially the same as those of the above-described embodiment, the description thereof is omitted here.

  The extension 49 extends from the front end of the bracket body 27 to the front of the vehicle to the protruding end of the bead portion 45. The extension 49 is joined to the protruding end by welding or the like.

  Thus, the reinforcement bracket 25 and the bead part 45 are joined. Therefore, the jack-up portion 41 is reinforced by the reinforcing bracket 25 and the reinforcing bracket 25 is reinforced by the bead portion 45. Accordingly, the rigidity around the tie-down hole 23 is further increased, and the rigidity of the jack-up portion 41 is further increased.

  In the above embodiment, the pair of ribs 39a and 39c extending in the vehicle width direction are formed on the front partition wall 33. However, the present invention is not limited to this, and one or more ribs extending in the vehicle width direction are formed. May be.

  Moreover, in the said embodiment, although only the upper inner side joining piece 33b is joined to the location corresponding to the cross member 19 among a pair of inner side joining pieces 33b and 33b of the front side partition wall 33, both inner side joining pieces 33b, 33b may be joined to a location corresponding to the cross member 19.

  As described above, the vehicle body lower part structure of the vehicle according to the present invention can be applied to the use of both improving the rigidity of the side sill and securing the load path at the time of the vehicle side collision while suppressing the number of parts.

DESCRIPTION OF SYMBOLS 1 Vehicle 3 Side sill 7 Floor panel 7a Front floor panel 7b Rear floor panel 7c Kick-up part 9 Rear side frame 17 Cross member 19d Bottom wall part 23 Tie down hole 27 Bracket main body (reinforcing member)
33 Front partition wall (partition member)
33b Inner joint piece (joint piece)
35 Rear partition wall 39a Upper rib (rib)
39c Lower rib (rib)
47 Reinforcement bracket

Claims (3)

A boundary between the front floor panel of the floor panel and the rear floor panel at the rear of the vehicle. The part is formed with a step-up kick-up portion on the rear side of the vehicle, and a pair of rear side frames are provided below the rear floor panel at both ends in the vehicle width direction and inside the pair of side sills in the vehicle width direction. A cross member extending in the vehicle width direction connects the pair of side sills and the front end of each rear side frame is connected to the inner side in the vehicle width direction of each side sill. In the lower body structure of the vehicle
Each side sill has a closed cross-sectional shape, and a tie-down hole in which a tie-down hook is locked is formed on the bottom wall portion thereof.
A reinforcing member that reinforces the periphery of the tie-down hole is provided on the periphery of the tie-down hole on the bottom wall,
In the side sill, there is provided a partition member that extends upward from the reinforcing member and partitions the side sill in the vehicle front-rear direction.
The vehicle body lower part structure for a vehicle, wherein the partition member is joined to the cross member corresponding portion on the inner peripheral surface of the side sill. The vehicle body lower part structure according to claim 1,
A vehicle body lower part structure for a vehicle, wherein the partition member is formed with a rib extending in a vehicle width direction. The vehicle body lower part structure according to claim 2,
On the inner end in the vehicle width direction of the partition member, a joining piece is formed that is joined to the cross member corresponding portion of the inner side surface of the side sill,
A vehicle body lower part structure for a vehicle, wherein the rib extends toward the joining piece.

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