JP5115386B2 - Vehicle floor structure - Google Patents

Description

  The present invention relates to a vehicle floor structure including a center floor member extending along a vehicle width direction and a center floor cross member joined to a vehicle lower side of the center floor member.

Patent Document 1 below discloses a vehicle body floor structure in which a closed cross-sectional shape extending in the vehicle width direction is formed by a rear floor panel and a cross member.
JP 2000-108947 A

  However, in the case of the above prior art, the ridge lines at both ends in the vehicle width direction of the rear floor panel and the ridge lines at both ends in the vehicle width direction of the cross member are not mentioned, for example, the positions where both ridge lines coincide with the vehicle width direction. The rear floor panel and the cross member may be deformed from the ridgeline as a starting point due to the suspension input when traveling on a rough road. On the other hand, in order to ensure the strength of the vehicle body floor, for example, if only the portion of the rear floor panel that forms the closed cross section with the cross member is divided and the plate thickness is increased, this leads to an increase in the number of parts and an increase in weight.

  In view of the above facts, an object of the present invention is to provide a vehicle floor structure that can suppress deformation of a center floor member and a center floor cross member.

A vehicle floor structure according to the invention of claim 1 extends along the vehicle width direction, and has a center floor member provided with a vertical wall portion extending from the floor upper surface portion to the vehicle lower side on the vehicle front side. A wall portion formed of a vertical wall disposed on the vehicle lower side of the center floor member and above the tunnel reinforcement along the vehicle vertical direction and the vehicle width direction , and an intermediate portion of the wall portion in the vertical direction along the vehicle width direction and a step portion formed to protrude toward the front of the vehicle, the lower end of the vertical wall portion on the front end portion of the step portion is joined to, and the upper end of the wall portion A center floor cross member in which a closed cross section with the center floor member is formed by joining the floor upper surface portion to the center, and the floor that is provided at both ends of the center floor member in the vehicle width direction and forms the closed cross section The floor-side ridge line portion formed on the upper surface portion or the vertical wall portion, and the step provided on both ends of the center floor cross member in the vehicle width direction and facing the floor upper surface portion or the vertical wall portion in the closed section. And a floor cross member side ridge line portion arranged at a position offset in the vehicle width direction and the floor side ridge line portion.

  According to a second aspect of the present invention, in the vehicle floor structure according to the first aspect, the floor side ridge line portion is formed along the vehicle front-rear direction on the floor upper surface portion constituting the closed cross section, and the floor cross A member side ridge line portion is formed along the vehicle front-rear direction in the stepped portion constituting the closed cross section, and the floor side ridge line portion and the floor cross member side ridge line portion are arranged in the vehicle width direction when the vehicle is viewed from the front. It is characterized by being offset.

  According to a third aspect of the present invention, in the vehicle floor structure according to the first aspect, the floor side ridge line portion is formed on the vertical wall portion constituting the closed cross section along the vehicle vertical direction, and the floor cloth is formed. A member side ridge line portion is formed in the vehicle vertical direction on the wall portion constituting the closed cross section, and the floor side ridge line portion and the floor cross member side ridge line portion are arranged in the vehicle width direction in a vehicle plan view. It is characterized by being offset.

  According to a fourth aspect of the present invention, in the vehicle floor structure according to the first aspect, the floor side ridge line portion is formed on the floor upper surface portion constituting the closed section along the vehicle front-rear direction. A ridge line portion and a floor vertical wall side ridge line portion formed along the vehicle vertical direction on the vertical wall portion constituting the closed cross section, and the floor cross member side ridge line portion includes the closed cross section. The stepped portion side ridge line portion formed along the vehicle longitudinal direction on the stepped portion configured, and the wall portion side ridgeline portion formed along the vehicle vertical direction on the wall portion configuring the closed cross section. The floor upper surface side ridge line portion and the stepped portion side ridge line portion are arranged offset in the vehicle width direction in the vehicle front view, and the floor vertical wall portion side ridge line portion and the wall in the vehicle plan view. The side ridge line part is offset in the vehicle width direction Characterized in that it is location.

According to the first aspect of the present invention, the center floor cross member is disposed on the vehicle lower side of the center floor member extending along the vehicle width direction. The center floor cross member, and a wall portion comprising a vertical wall which is arranged along the vehicle vertical direction and the vehicle width direction above the tunnel reinforcement, an intermediate portion in the vertical direction of the wall portion along the vehicle width direction the vehicle a step portion formed so as to protrude to the front side, are formed. The lower end of the vertical wall extending from the floor upper surface of the center floor member is joined to the front end of the step portion, and the floor upper surface of the center floor member is joined to the upper end of the wall of the center floor cross member. As a result, the center floor member and the center floor cross member form a closed cross section. At both ends in the vehicle width direction of the center floor member, floor side ridge lines are formed on the floor upper surface portion or vertical wall portion constituting the closed cross section, and the floor side ridge lines at the vehicle width direction both ends of the center floor cross member At the position offset in the vehicle width direction, a floor cross member side ridge line portion is formed on the stepped portion or the wall portion facing the floor upper surface portion or the vertical wall portion in the closed cross section. In other words, the floor side ridge line portions formed at both ends in the vehicle width direction of the center floor member and the floor cross member side ridge line portions formed at both ends in the vehicle width direction of the center floor cross member are offset in the vehicle width direction. Are arranged. Accordingly, the center floor member and the center floor cross member are suppressed from being deformed from the floor side ridge line portion and the floor cross member side ridge line portion as a starting point due to suspension input or the like when traveling on a rough road. For this reason, for example, the center floor member and the center floor cross member are compared with the case where the floor side ridge line part and the floor cross member side ridge line part are provided at positions that coincide with the vehicle width direction in the vehicle front view or the vehicle plan view. Deformation can be suppressed. Further, it is not necessary to divide the center floor member or the like to increase the plate thickness, and it is possible to prevent an increase in the number of parts and an increase in weight.

  According to the second aspect of the present invention, the floor side ridge line portion is formed on the floor upper surface portion constituting the closed cross section along the vehicle front-rear direction, and the floor cross member side ridge line portion forms the closed cross section. The floor side ridge line part and the floor cross member side ridge line part are arranged offset in the vehicle width direction when viewed from the front of the vehicle. Thereby, it is possible to further suppress the deformation of the center floor member and the center floor cross member starting from the floor side ridge line part and the floor cross member side ridge line part due to the input of the suspension when traveling on a rough road.

  According to the third aspect of the present invention, the floor side ridge line portion is formed in the vertical wall portion constituting the closed section along the vehicle vertical direction, and the floor cross member side ridge line portion constitutes the closed section. The floor side ridge line part and the floor cross member side ridge line part are arranged offset in the vehicle width direction in a vehicle plan view. Thereby, it is possible to further suppress the deformation of the center floor member and the center floor cross member starting from the floor side ridge line part and the floor cross member side ridge line part due to the input of the suspension when traveling on a rough road.

  According to the fourth aspect of the present invention, the floor upper surface portion side ridge line portion is formed on the floor upper surface portion constituting the closed cross section along the vehicle front-rear direction, and the step portion side ridge line portion forms the closed cross section. The floor top surface side ridge line portion and the stepped portion side ridge line portion are arranged offset in the vehicle width direction when viewed from the front of the vehicle. The floor vertical wall portion side ridge line portion is formed along the vehicle vertical direction on the vertical wall portion constituting the closed cross section, and the wall portion side ridge line portion is formed along the vehicle vertical direction on the wall portion constituting the closed cross section. The floor vertical wall portion side ridge line portion and the wall portion side ridge line portion are arranged offset in the vehicle width direction in the vehicle plan view. As a result, the center floor member and the center floor cross start from the floor top surface side ridge line part, the step part side ridge line part, the floor vertical wall part side ridge line part, and the wall part side ridge line part by the input of the suspension at the time of rough road traveling, etc. It is possible to further reliably suppress the deformation of the member.

  As described above, the vehicle floor structure according to the first aspect of the present invention is excellent in that the deformation of the center floor member and the center floor cross member can be suppressed by the input of the suspension when traveling on a rough road. It has the effect.

  The vehicle floor structure according to the second aspect of the present invention has an excellent effect that deformation of the center floor member and the center floor cross member can be more effectively suppressed.

  The vehicle floor structure according to the third aspect of the present invention has an excellent effect that deformation of the center floor member and the center floor cross member can be more effectively suppressed.

  The vehicle floor structure according to the fourth aspect of the present invention has an excellent effect that the deformation of the center floor member and the center floor cross member can be more reliably suppressed.

  [First Embodiment]

  Hereinafter, a first embodiment of a vehicle floor structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  FIG. 1 is a perspective view of a vehicle to which the vehicle floor structure of the present invention is applied. As shown in this figure, a vehicle floor 12 is disposed in the lower portion of the body 11 of the vehicle 10 along the vehicle width direction and the vehicle front-rear direction. Further, a roof panel 14 is disposed in the upper portion of the body main body 11 along the vehicle width direction and the vehicle front-rear direction, and doors to which front side doors and rear side doors (not shown) are attached are attached to both sides of the body main body 11. An opening 16 is formed.

  A tunnel reinforcement 18 is provided in the vehicle width direction center of the vehicle floor 12 along the vehicle front-rear direction. A cross member 20 extending along the vehicle width direction is disposed on the vehicle rear side of the vehicle floor 12. The cross member 20 is disposed so as to protrude from the general surface 12A of the vehicle floor 12 and the upper side of the tunnel reinforcement 18 in the vehicle. The cross member 20 is disposed at a lower portion of a rear seat (not shown).

  FIG. 2 is a perspective view of the vehicle floor structure of the present invention. As shown in this figure, the cross member 20 includes a center floor panel 22 disposed on the vehicle upper side and a center floor cross member 24 disposed on the vehicle lower side of the center floor panel 22. . As shown in FIG. 3, the center floor panel 22 is extended to the vehicle lower side from the floor upper surface portion 26 formed along the vehicle width direction and the vehicle front-rear direction, and the vehicle front end portion of the floor upper surface portion 26. And a vertical wall portion 28. A substantially horizontal plane portion 26A is formed in the vehicle width direction intermediate portion of the floor upper surface portion 26 along the vehicle width direction. Floor side ridge line portions (folded lines) 27 are formed along the vehicle front-rear direction at both ends in the vehicle width direction of the flat surface portion 26A of the floor upper surface portion 26, and both sides of the floor side ridge line portion 27 in the vehicle width direction are It becomes the inclined surface 26B which becomes a downward slope as it goes to the width direction both ends.

  At both ends in the vehicle width direction of the inclined surface 26B, joint portions 26C to be joined to rocker inners (not shown) formed at the lower portions of both ends in the vehicle width direction of the body main body 11 are formed. In addition, although illustration is abbreviate | omitted, the raising bracket for attaching the rear sheet | seat which is not shown in figure is provided in the upper part of the junction part 26C. In the configuration in which the center floor panel 22 and the center floor cross member 24 are combined to form the cross member 20, the center of the cross member 20 in the vehicle width direction is determined from the seating posture of the rear seat (not shown), and the cross member 20. Since the end in the vehicle width direction is determined from the height of the rocker inner rear determined by the shape of the rear side door, a floor side ridge line portion 27 is formed on the floor upper surface portion 26 of the center floor panel 22. ing.

  As for the vertical wall part 28 of the center floor panel 22, the both ends of the vehicle width direction corresponding to the inclined surface 26B are extended to the vehicle lower side. An attachment portion 30 is formed at the lower end portion of the vertical wall portion 28 and bent to the vehicle front side and joined to the center floor cross member 24. A plurality of beads 32 are formed in the plane portion 26 </ b> A of the center floor panel 22 along the vehicle longitudinal direction.

  As shown in FIG. 4, the center floor cross member 24 protrudes from the upper side vertical wall portion 36 as the wall portion arranged in the vehicle vertical direction and the lower end portion of the upper side vertical wall portion 36 to the vehicle front side. And a lower-side vertical wall portion 40 as a wall portion disposed on the vehicle lower side from the front end portion of the step portion 38. At the upper end portion of the upper side vertical wall portion 36, an attachment portion 42 that is bent toward the vehicle rear side and joined to the lower surface of the floor upper surface portion 26 is formed (see FIG. 5). The attachment portion 42 is formed so that the both sides of the intermediate portion in the vehicle width direction have a downward slope according to the shape of the floor upper surface portion 26 as it goes to both ends in the vehicle width direction.

  The stepped portion 38 is provided along the vehicle width direction, and a substantially horizontal flat surface portion 38A is formed at an intermediate portion in the vehicle width direction. At both ends in the vehicle width direction of the flat portion 38A of the stepped portion 38, a floor cross member side ridge line portion (folded line) 39 is formed along the vehicle longitudinal direction, and both sides of the floor cross member side ridge line portion 39 in the vehicle width direction are formed. Is an inclined surface 38B that is inclined downward toward both ends in the vehicle width direction. A concave portion 44 through which the tunnel reinforcement 18 passes is provided in the central portion of the lower portion of the lower side vertical wall portion 40 of the center floor cross member 24. At the lower end portion of the lower vertical wall portion 40 of the center floor cross member 24, there is provided an attachment portion 46 that is bent toward the front side of the vehicle and joined to the general surface 12A of the vehicle floor 12 and the upper surface of the tunnel reinforcement 18. Yes. The upper side vertical wall portion 36 is provided with a plurality of beads 48 along the vehicle vertical direction, and the lower side vertical wall portion 40 is provided with a plurality of beads 50 along the vehicle vertical direction.

  The mounting portion 30 of the center floor panel 22 is formed so as to have a downward slope in accordance with the shape of the stepped portion 38 of the center floor cross member 24 as both side portions in the vehicle width direction go to the end side. As shown in FIG. 5, a tapered surface is formed at the front end portion of the stepped portion 38 of the center floor cross member 24. The lower end portion of the vertical wall portion 28 of the center floor panel 22 is joined to the tapered surface of the step portion 38 of the center floor cross member 24 by spot welding or the like, and the upper side vertical wall portion 36 of the center floor cross member 24 is The center floor panel 22 and the center floor cross member 24 form a closed cross section by joining the lower surface of the floor upper surface portion 26 of the center floor panel 22 to the mounting portion 42 formed at the upper end portion by spot welding or the like. Yes.

As shown in FIG. 6, the vehicle is placed on the floor side ridge line portion 27 formed along the vehicle front-rear direction on the floor upper surface portion 26 of the center floor panel 22 and the step portion 38 of the center floor cross member 24 when viewed from the front of the vehicle. The floor cross member side ridge line portion 39 formed along the front-rear direction is disposed at a position offset in the vehicle width direction. In other words, the floor-side ridge line portion 27 formed on the floor upper surface portion 26 (the upper surface of the closed section) constituting the closed section is formed on the stepped portion 38 (the lower surface of the closed section) facing the floor upper surface portion 26 in the closed section. The floor cross member side ridge line portion 39 is disposed at a position offset outward in the vehicle width direction. The distance W ₁ in the vehicle width direction between the floor side ridge line portion 27 and the floor cross member side ridge line portion 39 (the distance W ₁ on the perspective plane of the floor side ridge line portion 27 and the floor cross member side ridge line portion 39) is shifted by about 50 mm or more. Are preferably arranged.

  Next, the operation and effect of this embodiment will be described.

  In the vehicle floor structure, the floor side ridge line portion 27 formed on the floor upper surface portion 26 constituting the closed section is more vehicle than the floor cross member side ridge line portion 39 formed on the step portion 38 facing the floor upper surface portion 26. It is arranged at a position offset to the outside in the width direction. Thereby, it is possible to suppress deformation of the center floor panel 22 and the center floor cross member 24 from the floor side ridge line portion 27 and the floor cross member side ridge line portion 39 as a starting point due to suspension input or the like when traveling on a rough road. . Furthermore, since it is not necessary to divide the center floor panel 22 or the like to increase the plate thickness, the center floor panel 22 or the like can be composed of one part, and an increase in the number of parts and an increase in weight can be prevented. it can.

  FIG. 9 shows a vehicle floor structure according to a comparative example. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 9, the cross member 100 includes a center floor panel 102 disposed on the vehicle upper side and a center floor cross member 24 disposed on the vehicle lower side of the center floor panel 102. . At both ends in the vehicle width direction of the floor upper surface portion 26 of the center floor panel 102, a floor side ridge line portion 104 is formed along the vehicle front-rear direction, and on the vehicle width direction center portion side with the floor side ridge line portion 104 interposed therebetween. A flat portion 26A is formed, and an inclined surface 26B is formed on the vehicle width direction end portion side. At that time, the floor side ridgeline portion 104 formed along the vehicle front-rear direction on the floor upper surface portion 26 of the center floor panel 102 and the stepped portion 38 of the center floor cross member 24 along the vehicle front-rear direction when viewed from the front of the vehicle. The formed floor cross member side ridge line portion 39 is arranged at a position substantially coincident with the vehicle width direction.

  In the vehicle floor structure according to the comparative example, the floor side ridgeline portion 104 formed on the floor upper surface portion 26 of the center floor panel 102 and the floor cross formed on the step portion 38 of the center floor cross member 24 in the vehicle front view. The member-side ridge line portion 39 is arranged at a position substantially coincident with the vehicle width direction, and the center is started from the floor-side ridge line portion 104 and the floor cross member-side ridge line portion 39 by the input of a suspension during rough road driving. The floor panel 102 and the center floor cross member 24 may be deformed. That is, the deformation of the center floor panel 102 and the center floor cross member 24 may concentrate in the directions indicated by the arrows B and C in FIG. 10 starting from the floor side ridge line portion 104 and the floor cross member side ridge line portion 39. There is.

  FIG. 8 shows an analysis diagram in which the deformed state of the cross member 20 of the present embodiment in the cross section along the line AA in FIG. 7 is compared with the deformed state of the cross member 100 of the comparative example. .

  As shown in FIG. 8, in the cross member 20 of the present embodiment, the deformation amount of the vertical wall portion 28 of the center floor panel 22 and the upper side vertical wall portion 36 of the center floor cross member 24 is such that the cross member 100 of the comparative example. It can be seen that the amount of deformation of the vertical wall 28 of the center floor panel 102 and the upper vertical wall 36 of the center floor cross member 24 is small. Therefore, in the cross member 20 according to the present embodiment, the floor side ridge line portion 27 and the floor cross member side ridge line portion 27 and the floor cross member side ridge line portion 39 are arranged offset in the vehicle width direction. It is possible to suppress the deformation of the center floor panel 22 and the center floor cross member 24 starting from 39.

  [Second Embodiment]

  Next, a second embodiment of the vehicle floor structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 11, the cross member 60 includes a center floor panel 62 disposed on the vehicle upper side and a center floor cross member 64 disposed on the vehicle lower side of the center floor panel 62. . On the vertical wall portion 28 of the center floor panel 62, a floor-side ridge line portion (folded line) 66 is formed along the vehicle vertical direction. The vertical wall portion 28 retreats to the vehicle rear side at the vehicle width direction end portion across the floor side ridge line portion 66 and the flat portion 62A along the vehicle vertical direction at the vehicle width direction center portion across the floor side ridge line portion 66. And an inclined portion 62B. On the upper side vertical wall portion 36 of the center floor cross member 64, a floor cross member side ridge line portion (folded line) 68 is formed along the vehicle vertical direction. The upper-side vertical wall portion 36 includes a plane portion 64A along the vehicle vertical direction at the center in the vehicle width direction with the floor cross member side ridge line portion 68 interposed therebetween, and a vehicle width direction end portion with the floor cross member side ridge line portion 68 interposed therebetween. And an inclined portion 64 </ b> B that is retracted to the vehicle rear side.

In the cross member 60, the vehicle is placed on the floor side ridgeline portion 66 formed in the vertical wall portion 28 of the center floor panel 62 along the vehicle vertical direction in the vehicle plan view, and on the upper side vertical wall portion 36 of the center floor cross member 64. A floor cross member side ridge line portion 68 formed along the vertical direction is disposed at a position offset in the vehicle width direction. In other words, the floor side ridge line portion 66 formed on the vertical wall portion 28 (front surface of the closed cross section) of the center floor panel 62 constituting the closed cross section of the center floor cross member 64 facing the vertical wall portion 28 in the closed cross section. The floor cross member side ridge line portion 68 formed on the upper side vertical wall portion 36 (the rear surface of the closed cross section) is disposed at a position offset outward in the vehicle width direction. The distance W ₂ in the vehicle width direction between the floor side ridge line part 66 and the floor cross member side ridge line part 68 (the distance W ₂ on the perspective plane between the floor side ridge line part 66 and the floor cross member side ridge line part 68) is shifted by about 50 mm or more. Are preferably arranged.

  Next, the operation and effect of this embodiment will be described.

  In the vehicle floor structure, the floor-side ridgeline portion 66 formed on the vertical wall portion 28 of the center floor panel 62 constituting the closed section has an upper-side vertical length on the center floor cross member 64 facing the vertical wall portion 28 in the closed section. The floor cross member side ridge line portion 68 formed on the wall portion 36 is disposed at a position offset outward in the vehicle width direction. Thereby, it is possible to prevent the center floor panel 62 and the center floor cross member 64 from being deformed from the floor side ridge line portion 66 and the floor cross member side ridge line portion 68 as a starting point due to suspension input or the like when traveling on a rough road. . Furthermore, since it is not necessary to divide the center floor panel 62 and the like to increase the plate thickness, the center floor panel 62 and the like can be configured with one part, and an increase in the number of parts and an increase in weight can be prevented. it can.

  [Third Embodiment]

  Next, a third embodiment of the vehicle floor structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st Embodiment and 2nd Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 12, the cross member 70 includes a center floor panel 72 disposed on the vehicle upper side, and a center floor cross member 74 disposed on the vehicle lower side of the center floor panel 72. . The floor upper surface portion 26 of the center floor panel 72 is formed with a floor upper surface portion side ridge line portion 76 as a floor side ridge line portion along the vehicle longitudinal direction, and the vertical wall portion 28 of the center floor panel 72 has a vehicle A floor vertical wall portion side ridge line portion 82 as a floor side ridge line portion is formed along the vertical direction. The floor upper surface portion 26 is inclined to the vehicle lower side at the vehicle width direction end portion with the floor side ridge line portion 66 sandwiched between the substantially horizontal plane portion 72A and the floor side ridge line portion 66 with the floor surface ridge line portion 76 interposed therebetween. And an inclined portion 72B. Vertical wall portion 28 includes a flat portion 74C along the vehicle vertical direction in the vehicle width direction central portion across the floor vertical wall side ridge portion 82, the vehicle lateral direction end portion across the floor vertical wall side ridge portion 82 And an inclined portion 74D that is retracted to the vehicle rear side.

On the stepped portion 38 of the center floor cross member 74, a stepped portion side ridgeline portion 80 is formed as a floor crossmember side ridgeline portion along the vehicle longitudinal direction, and the upper side vertical wall portion 36 of the center floor crossmember 74 is formed. A wall side ridge line part 78 is formed as a floor cross member side ridge line part along the vehicle vertical direction. The stepped portion 38 has a substantially horizontal flat portion 74A at the center in the vehicle width direction across the stepped portion side ridgeline portion 80, and an inclination inclined toward the vehicle lower side at the vehicle widthwise end portion across the stepped portion side ridgeline portion 80. Part 74B. Vehicle upper side vertical wall portion 36, and a flat portion 72C along the vehicle vertical direction in the vehicle width direction central portion across the wall side ridge portion 78, in the vehicle width direction end portion sides of the wall-side ridgeline portion 78 And an inclined portion 72D that is retracted to the rear side.

In the cross member 70, a floor upper surface side ridge line portion 76 formed on the floor upper surface portion 26 of the center floor panel 72 along the vehicle front-rear direction in the vehicle front view is formed on the stepped portion 38 of the center floor cross member 74. It arrange | positions in the position offset to the vehicle width direction outer side with respect to the level | step-difference part side ridgeline part 80 formed along the direction (refer the dashed-dotted line in FIG. 12 (A)). Further, a wall-side ridgeline portion 78 formed along the vehicle vertical direction on the upper side vertical wall portion 36 of the center floor cross member 74 in the vehicle plan view is formed on the vertical wall portion 28 of the center floor panel 72 in the vehicle vertical direction. Is disposed at a position offset inward in the vehicle width direction with respect to the ridge line portion 82 on the floor vertical wall portion formed along the vertical direction. The distance in the vehicle width direction between the floor upper surface side ridge line portion 76 and the stepped portion side ridge line portion 80 (distance on the perspective plane), and the distance between the floor vertical wall portion side ridge line portion 82 and the wall side ridge line portion 78 in the vehicle width direction ( The distance on the perspective plane) is preferably shifted by about 50 mm or more.

  Next, the operation and effect of this embodiment will be described.

In the vehicle floor structure, the floor upper surface side ridge line portion 76 and the stepped portion side ridge line portion 80 are disposed at positions offset in the vehicle width direction, and the floor vertical wall portion side ridge line portion 82 and wall portion side ridge line portion 78 are arranged. Are arranged at positions offset in the vehicle width direction, and the positions of the respective broken lines are shifted at two positions on the closed cross section. Thus, the center floor panel starts from the floor upper surface side ridge line portion 76, the step portion side ridge line portion 80, the floor vertical wall portion side ridge line portion 82, and the wall side ridge line portion 78 as a starting point due to suspension input or the like when traveling on a rough road. It can suppress more reliably that 72 and the center floor cross member 74 deform | transform. Furthermore, since it is not necessary to divide the center floor panel 72 etc. to increase the plate thickness, the center floor panel 72 etc. can be configured with one part, and an increase in the number of parts and an increase in weight can be prevented. it can.

  [Supplementary explanation of the embodiment]

  In the first embodiment described above, the floor-side ridge line portion 27 is offset to the vehicle width direction outer side than the floor cross member-side ridge line portion 39. However, the present invention is not limited to this and may be configured to be offset in the reverse direction.

  In the second embodiment described above, the floor cross member-side ridge line portion 68 is offset to the vehicle width direction outer side than the floor-side ridge line portion 66. However, the present invention is not limited to this, and a configuration in which it is offset in the reverse direction may be used.

In the third embodiment described above, the floor top surface side ridge line portion 76 is offset outward in the vehicle width direction from the stepped portion side ridge line portion 80, and the wall side ridge line portion 78 is from the floor vertical wall portion side ridge line portion 82 . Is also offset inward in the vehicle width direction, but is not limited thereto, and may be configured to be offset in the opposite direction. That is, a configuration in which the floor top surface side ridge line portion 76 and the stepped portion side ridge line portion 80 are offset in the reverse direction, a configuration in which the wall side ridge line portion 78 and the floor vertical wall portion side ridge line portion 82 are offset in the reverse direction, or both It may be configured to offset in the reverse direction.

  Further, in the present invention, the floor side ridge line portion and the floor cross member side ridge line portion do not necessarily have to be formed only in the closed cross section of the center floor panel and the center floor cross member, and are provided extending outside the closed cross section. It may be done.

1 is a perspective view showing a vehicle to which a vehicle floor structure according to a first embodiment is applied. 1 is a perspective view showing an overall configuration of a vehicle floor structure according to a first embodiment. It is a perspective view which shows the center floor panel single-piece | unit used for the vehicle floor structure which concerns on 1st Embodiment. It is a perspective view which shows the center floor cross member single-piece | unit used for the vehicle floor structure which concerns on 1st Embodiment. It is a longitudinal section showing the closed section part of the floor structure for vehicles concerning a 1st embodiment. It is a partial front view showing the floor structure for vehicles concerning a 1st embodiment. It is a partial front view for demonstrating the deformation | transformation of the floor structure for vehicles which concerns on 1st Embodiment. It is sectional drawing which shows the deformation | transformation state of the vehicle floor structure which concerns on 1st Embodiment in the AA in FIG. 7, and the vehicle floor structure which concerns on a comparative example. It is a perspective view which shows the whole structure of the floor structure for vehicles which concerns on a comparative example. It is a top view for demonstrating the deformation | transformation of the vehicle floor structure which concerns on a comparative example. It is a top view which shows the whole structure of the floor structure for vehicles which concerns on 2nd Embodiment. (A) is a front view which shows the whole structure of the vehicle floor structure which concerns on 3rd Embodiment, (B) is a top view which shows the whole structure of the vehicle floor structure which concerns on 3rd Embodiment.

Explanation of symbols

10 Vehicle 20 Cross member (Vehicle floor structure)
22 Center floor panel 24 Center floor cross member 26 Floor upper surface portion 27 Floor side ridge line portion 28 Vertical wall portion 36 Upper side vertical wall portion (wall portion)
38 Stepped portion 39 Floor cross member side ridge line portion 60 Cross member (vehicle floor structure)
62 Center floor panel 64 Center floor cross member 66 Floor side ridge line portion 68 Floor cross member side ridge line portion 70 Cross member (vehicle floor structure)
72 Center floor panel 74 Center floor cross member 76 Floor top side ridge line part 78 Wall side ridge line part 80 Step part side ridge line part 82 Floor vertical wall part side ridge line part

Claims (4)

A center floor member that extends along the vehicle width direction and includes a vertical wall portion that extends from the floor upper surface portion to the vehicle lower side on the vehicle front side;
The center floor member is disposed on the vehicle lower side, and is provided with a wall portion composed of a vertical wall disposed above the tunnel reinforcement along the vehicle vertical direction and the vehicle width direction , and an intermediate portion in the vertical direction of the wall portion. A step portion formed so as to protrude toward the vehicle front side along the vehicle width direction, and a lower end portion of the vertical wall portion is joined to a front end portion of the step portion, and an upper end portion of the wall portion A center floor cross member in which a closed cross section with the center floor member is formed by bonding the floor upper surface portion to the center floor member;
A floor side ridge line portion formed on the floor upper surface portion or the vertical wall portion that is provided at both ends in the vehicle width direction of the center floor member and constitutes the closed section;
The center floor cross member is provided at both ends in the vehicle width direction, and is formed on the stepped portion or the wall portion facing the floor upper surface portion or the vertical wall portion in the closed section, and the floor side ridge line portion; A floor cross member side ridge line portion arranged at a position offset in the vehicle width direction;
A vehicle floor structure characterized by comprising: The floor side ridge line portion is formed on the floor upper surface portion constituting the closed section along the vehicle front-rear direction, and the floor cross member side ridge line portion is formed on the step portion constituting the closed section in the vehicle front-rear direction. Formed along the
2. The vehicle floor structure according to claim 1, wherein the floor side ridge line part and the floor cross member side ridge line part are arranged offset in the vehicle width direction when viewed from the front of the vehicle. The floor side ridge line portion is formed in the vertical wall portion constituting the closed cross section along the vehicle vertical direction, and the floor cross member side ridge line portion is formed in the vehicle vertical direction on the wall portion constituting the closed cross section. Formed along the
2. The vehicle floor structure according to claim 1, wherein the floor side ridge line part and the floor cross member side ridge line part are arranged offset in the vehicle width direction in a vehicle plan view. The floor side ridge line part is formed on the floor upper surface part constituting the closed cross section along the vehicle front-rear direction, and the vertical wall part constituting the closed cross section is arranged in the vehicle vertical direction. And the floor vertical wall portion side ridge line portion formed along,
The floor cross member side ridge line portion is formed in the stepped portion side ridgeline portion along the vehicle longitudinal direction in the stepped portion constituting the closed cross section, and the wall portion constituting the closed cross section along the vehicle vertical direction. The wall side ridge line part formed by,
The floor upper surface portion side ridge line portion and the stepped portion side ridge line portion are arranged offset in the vehicle width direction in a vehicle front view, and the floor vertical wall portion side ridge line portion and the wall portion in a vehicle plan view. The vehicle floor structure according to claim 1, wherein the side ridge line portion is arranged offset in the vehicle width direction.

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