JP5434082B2 - Body floor structure - Google Patents

Description

  The present invention relates to a vehicle body floor structure of an automobile, and more particularly to a vehicle body floor structure capable of protecting a part requiring protection provided on the floor against load input from a side portion.

  Conventionally, as a body floor structure of an automobile, a side sill collapsed is provided on the inner side of the side sill in order to prevent the center pillar member from entering the vehicle interior in response to load input from the side of the vehicle. What is made to be combined with the deformation | transformation by bending of the floor panel member which was made is known.

Japanese Patent No. 3198960

  However, in such a conventional vehicle body floor structure, the vicinity of the seat mounting bracket that fixes the seat in the passenger compartment to the floor panel member is relatively strong.

  For this reason, the seat mounting bracket moves toward the inside of the vehicle on the upper surface of the floor panel member due to the falling deformation of the side sill or the deformation of the floor panel member, and is provided on the upper surface side of the floor panel member. There is a risk of interference with a battery or a part to be protected such as a fuel tank.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle body floor structure that can protect a part requiring protection provided on the floor and improve the degree of freedom of layout.

In order to achieve the above object, the present invention has side sill portions extending in the longitudinal direction along the vehicle longitudinal direction at both ends in the vehicle width direction of the floor panel member, and at the center portion of the floor panel member. in that in the vehicle floor structure essential protected components are arranged, a load input direction from the side of the vehicle, and the side sill section, a position between the main protected components, provided the sheet mount bracket member, said The seat mount bracket member extends along the vehicle front-rear direction so that the seat fixing surface portion of the seat mount bracket member promotes bending deformation toward the outer side in the vehicle width direction by the advancement of the side sill portion toward the vehicle interior direction . It is characterized by a vehicle body floor structure having a fragile portion having a vertical cross-sectional shape having a step in the vehicle width direction .

  According to the present invention, when load input from the side of the vehicle is applied to the side sill portion, the load input is first present at a position between the side sill portion and the protection required component before being transmitted to the protection target component. Is transmitted to the seat mount bracket member.

  In the seat mount bracket member, the weak portion is buckled and deformed, so that the seat fixing surface portion is inclined toward the outer side in the vehicle width direction, and the deformation is promoted, so that the progress toward the protection target component is performed. Is alleviated.

  For this reason, the possibility that the seat fixing surface portion of the seat mount bracket member interferes with the protection target component can be reduced.

  Therefore, it is possible to protect the parts to be protected provided on the floor portion of the floor panel against the load input from the side of the vehicle and improve the layout flexibility.

It is a partial section perspective view of an important section in a body floor structure of an embodiment of the invention. It is a disassembled perspective view explaining the whole structure of a motor vehicle with the vehicle body floor part structure of embodiment. It is sectional drawing in the position along the AA in FIG. 1 explaining the structure of the principal part by the vehicle body floor part structure of embodiment. FIG. 2 is a cross-sectional view at a position corresponding to a position along the line AA in FIG. 1, illustrating a main part to which a load input F is applied in the vehicle body floor structure of the embodiment. It is a partial cross section perspective view of the principal part by the vehicle body floor part structure of Example 1 of an embodiment of the invention. FIG. 6 is a cross-sectional view at a position along the line BB in FIG. 5, illustrating a configuration of a main part in the vehicle body floor structure of the first embodiment. FIG. 6 is a cross-sectional view at a position corresponding to a position along the line BB in FIG. 5, illustrating a main part to which a load input F is applied in the vehicle body floor structure of the first embodiment.

  Hereinafter, a vehicle body floor structure according to an embodiment of the present invention will be described with reference to the drawings.

  1 to 7 show a vehicle body floor structure according to an embodiment of the present invention.

  First, in terms of the overall configuration, in the vehicle body floor structure of this embodiment, the floor 2 of the automobile 1 as shown in FIG. 2 has a front floor panel member 3 as a substantially flat floor panel member. Laid.

  On the lower surface side of the front floor panel member 3, a component storage recess 3c having a storage space 3b that protrudes upward and has a recess downward is formed in the center, and the component storage recess 3c The battery B, which is an article requiring protection, is stored and held.

  Further, side sill portions 4 and 4 extending in the longitudinal direction along the vehicle front-rear direction are respectively provided at both end portions 3 a and 3 a in the vehicle width direction of the front floor panel member 3.

  As shown in FIG. 1, the side sill portion 4 includes a side sill inner member 4a and a side sill outer member 4b, and the side sill inner member 4a and the side sill outer member 4b are joined in the vehicle width direction. Thus, a hollow portion 4c having a hollow cross-sectional shape is formed inside.

  Further, a second cross member member 5 is extended at the center of the front floor panel member 3 along the longitudinal direction in the vehicle width direction.

  In the load input direction F from the side of the vehicle indicated by the white arrow in FIG. 1, there is a position between the side sill inner member 4 a of the side sill portion 4 and the storage space 3 b in which the battery B is stored. A pair of left and right seat mount bracket members 6 and 6 are provided on both sides of the second cross member member 5 in the vehicle width direction.

  The seat mount bracket member 6 supports a lower frame material of a seat (not shown) by fastening a bolt member or the like through a fixing hole portion 6e formed in an opening substantially in the center and fastening. A sheet fixing surface portion 6a having a predetermined rigidity is provided.

  In addition, the seat mount bracket member 6 is joined by overlapping the inner edge 6b from the lower side on the inner surface side of the outer edge portion 5a of the second cross member member 5.

  The second cross member member 5 has a fixing hole portion 5e as a seat fixing surface portion for fixing the seat on the upper surface side so as to form a pair with the fixing hole portion 6e near the vehicle center in the vehicle width direction. Is formed.

  Further, the seat mount bracket member 6 has an outer flange portion 6c integrally projecting from the seat fixing surface portion 6a at a lower position in the vehicle vertical direction, and is provided on the upper surface portion 4d of the side sill inner member 4a. The flange portion 6c is overlapped and joined from above in the vehicle vertical direction.

  A fragile portion 7 is formed below the seat fixing surface portion 6a of the seat mount bracket member 6 and at a corner 6d on the inner side in the vehicle width direction from the position where the outer flange portion 6c is formed.

  As shown by the solid line position in FIG. 4, the weak portion 7 of this embodiment causes the seat fixing surface portion 6 a of the seat mount bracket member 6 to move outward in the vehicle width direction as the side sill portion 4 advances in the vehicle interior direction. The vertical cross-sectional shape along the vehicle front-rear direction has a step that changes rapidly in the vehicle width direction so that the bending deformation of the seat mount bracket member 6 is promoted while the upper surface side is inclined toward the vehicle. It is mainly composed.

  Further, in this embodiment, the both ends of the front floor panel member 3 in the vehicle width direction are positioned between the side sill inner member 4a of the side sill portion 4 and the storage space 3b in which the battery B is stored. A pair of side groove portions 3e, 3e formed in a concave shape that opens upward is formed along the longitudinal direction in the vehicle longitudinal direction along the portions 3a, 3a.

  The side groove 3e is provided with a gusset member 8, an extension front side member 9 and a cover member 10.

  Of these, the gusset member 8 is joined along the outer joint flange portion 8a joined to the upper end edge of the side surface portion 4e of the side sill inner member 4a and the outer edge of the horizontal upper surface side 9a of the extension front side member member 9. The inner horizontal flange portion 8b and the upper surface side 8d are inclined toward the inner side in the vehicle width direction, and the outer joint flange portion 8a and the inner horizontal flange portion 8b are joined together as a flat plate-like inclined surface portion 8c. And is mainly configured.

  Further, the extension front side member member 9 is connected to the bottom surface fixing flange portion 9b fixed to the bottom surface of the side groove portion 3e and the bottom surface fixing flange portion 9b, and is substantially orthogonal to the outer edge of the horizontal upper surface side 9a. And a storage-side fixing flange portion 9d provided at the inner edge of the horizontal upper surface side 9a and connected to the outer surface 3d of the component storage recess 3c in the vehicle width direction. And it is mainly composed.

  Further, the cover member 10 includes a lower horizontal flange portion 10a connected to the outer side in the vehicle width direction from a position where the storage-side fixing flange portion 9d of the horizontal upper surface side 9a is formed, and parts of the front floor panel member 3 The upper surface horizontal flange portion 10b that is overlapped and joined to the upper surface side of the outer edge of the storage recess 3c in the vehicle width direction is integrally connected between the lower surface horizontal flange portion 10a and the upper surface horizontal flange portion 10b. And a side cover body main body 10c that covers the outer side surface 3d in the vehicle width direction of the storage space 3b in which the battery B is stored, and is configured such that the longitudinal cross-sectional shape in the vehicle width direction is substantially U-shaped. .

  In this embodiment, the cover member 10 is fixed to the lower surface side of the seat mount bracket member 6 in advance, and the seat mount bracket member 6 is attached to the vehicle body at the same time as being attached to the vehicle body floor. Is configured to complete.

  Furthermore, the cover member 10 is configured so as to be spaced apart from the outer surface 3d of the component storage recess 3c of the front floor panel member 3 in the vehicle width direction when mounted on the vehicle body.

  Further, the side sill inner member 4 a, the side sill outer member 4 b, the gusset member 8, the second cross member member 5, and the extension front side member member 9 constituting the side sill portion 4 are relatively free from the front floor panel member 3. It is configured with high strength.

  Next, the effect of the vehicle body floor structure according to the embodiment of the present invention will be described.

  In the vehicle body floor structure of this embodiment, as indicated by the white arrow in FIG. 1, when load input F from the side of the vehicle is applied to the side sill portion 4, a storage space in which the battery B is stored. Before this load input F is transmitted to 3b, it is first transmitted to the seat mount bracket member 6 that is located between the side sill portion and the protection required component.

  In the seat mount bracket member 6, when the load input F is applied from the outer flange portion 6c toward the inner side in the vehicle width direction, the inner corner portion 6d on the inner side in the vehicle width direction from the position where the outer flange portion 6c is formed. 4 is buckled and deformed from a position indicated by a two-dot chain line in FIG. 4 as indicated by a solid line.

  Therefore, the buckling deformation of the fragile portion 7 promotes the bending deformation while the seat fixing surface portion 6a is inclined toward the vehicle width direction outer side, and from the position indicated by the two-dot chain line in FIG. Progress toward the parts requiring protection is alleviated.

  At this time, from the start of the action of the load input F to after the buckling, the input is not easily transmitted to the outer surface 3d of the battery B and the component housing recess 3c, and the impact energy is absorbed by the deformation of the seat mount bracket member 6. Then, load transmission is performed in the direction of the extension front side member member 9 by the support reaction force of the gusset member 8.

  Since the extension front side member member 9 has relatively high rigidity, the side groove portion 3e of the front floor panel member 3 positioned below the gusset member 8 first starts buckling deformation.

  At this time, as in the conventional case, the side sill portion 4 falls and deforms toward the inside of the vehicle, and the buckle deformation with a larger amount of energy absorption per moving distance is caused than the case where the front floor panel member 3 is bent and deformed. Induced by the side groove 3e of the front floor panel member 3, the load input F can be absorbed with good efficiency.

  Further, in the front floor panel member 3, the side groove portion 3e is crushed in the vehicle width direction, and the side sill portion 4 is not deformed in the rolling direction R in FIG. It deform | transforms so that it may infiltrate from the lower side of the said seat mount bracket member 6 toward a direction.

  For this reason, the seat fixing surface portion 6a of the seat mount bracket member 6 can be inclined toward the outside in the vehicle width direction.

  At this time, as shown by a solid line in FIG. 4, a load input in the vehicle upward direction is applied to the seat fixing surface portion 6a, and the outer edge portion 5a of the second cross member member 5 is lifted from the lower side on the inner surface side. While the deformation is promoted, the fragile portion 7 moves inward in the vehicle width direction toward the lower side of the relatively rigid seat fixing surface portion 6a while being buckled.

  The position of the outer flange portion 6c in the vehicle vertical direction is restricted by the extension front side member member 9 from moving downward, so that the seat fixing surface portion 6a is moved toward the vehicle upper side while moving in the vehicle width direction. It can be tilted towards the outside.

  Therefore, the possibility that the seat fixing surface portion 6a of the seat mount bracket member 6 interferes with the battery B mounted in the storage space 3b of the front floor panel member 3 can be further reduced.

  Moreover, since the seat fixing surface portion 6a of the seat mount bracket member 6 tilts the upper surface side toward the outer side in the vehicle width direction, the portion of the front floor panel member 3 positioned above the battery B is directed toward the battery B. The deformation that curves downward is also suppressed.

  Therefore, in this embodiment, even if a part requiring protection such as a battery B is provided on the floor of the front floor panel member 3, a part having a relatively high peripheral edge due to a load input F from the side of the vehicle. Can be protected against interference, and the degree of freedom in layout of the position where the battery B is arranged in the body of the automobile can be improved.

  Further, a gusset member 8 is straddled between the side sill portion 4 and the battery B below the fragile portion 7.

  Since the seat fixing surface portion 6a has relatively high rigidity, the seat fixing surface to the second cross member member 5 as shown in FIG. 4 with the buckling position generated in the weakened portion 7 as a boundary. The progress of deformation on the surface portion 6a side is suppressed, and deformation on the lower side of the gusset member 8 and the seat mount bracket member 6 is promoted on the gusset member 8 side.

  By such a deformation mode, an effect is obtained in which the load input F is not easily transmitted to the outer surface 3d of the battery B and the component housing recess 3c.

  Further, the second cross member member 5 is disposed in the vehicle width direction between the fixing hole portion 6e of the seat fixing surface portion 6a and the fixing hole portion 5e of the second cross member member 5 in the direction of the front floor panel member 3 below. Deformation in a deformation direction that is bent toward the surface is avoided.

  Accordingly, also in this respect, the possibility that the second cross member member 5 interferes with the battery B mounted in the storage space 3b from above is further reduced, so that the battery is placed below the second cross member member 5. The storage space 3b for storing B can be provided, and the degree of freedom in layout can be further improved.

  Further, in this embodiment, the side sill inner member 4a of the side sill portion 4 and the storage space 3b in which the battery B is stored are positioned at both side edges 3a, 3a, A pair of side groove portions 3e and 3e formed in a concave shape that opens upward along 3a are formed along the longitudinal direction in the longitudinal direction of the vehicle, and in this side groove portion 3e, a gusset member 8 is formed. It extends between the horizontal upper surface side 9a of the extension front side member member 9 and the side surface portion 4e of the side sill inner member 4a.

  For this reason, the gusset member 8 is positioned below the fragile portion 7 of the seat mount bracket member 6, and the load input F is applied inward in the vehicle width direction from the outer flange portion 6c. However, the support reaction force of the gusset member 8 can be generated downward from the position where the outer flange portion 6c is formed.

  Accordingly, the load input F is transmitted in the direction of the extension front side member member 9 to suppress deformation of the seat fixing surface portion 6a, and the weakened portion 7 provided in the corner 6d on the inner side in the vehicle width direction. Further, the side groove 3e of the front floor panel member 3 is bent and deformed as shown by a solid line in FIG. 4 to absorb a desired amount of energy, and the outside of the battery B and the component housing recess 3c. A load transmission path that makes it difficult to transmit the input to the side surface 3d can be secured.

  Further, in this embodiment, even if the fragile portion 7 of the gusset member 8 and the seat mount bracket member 6 is deformed and moved inward in the vehicle width direction, the vehicle width of the storage space 3b in which the battery B is stored. Since the outer side surface 3d in the direction is covered by the side cover body 10c of the cover member 10, there is no possibility of direct interference, and the battery B can be reliably protected.

  In addition, if the cover member 10 is configured to be fixed to the lower surface side of the seat mount bracket member 6 in advance, the seat mount bracket member 6 is attached to the front floor panel member 3 and simultaneously attached to the vehicle body. Installation is complete.

  Therefore, the assemblability is good and the manufacturing cost can be prevented from rising as compared with a configuration in which separate parts are separately fixed.

  FIGS. 5 to 7 show a vehicle body floor structure of Example 1 of the embodiment of the present invention.

  Note that portions that are the same as or equivalent to those in the above-described embodiment are described with the same reference numerals.

  First, the differences in configuration will be mainly described. In the vehicle body floor structure of the first embodiment, the lower edge portion 16c of the seat mount bracket member 16 stores and holds the battery B which is the article requiring protection. Connected to the vehicle width direction outer side surface 3d of the component housing recess 3c, and from the outer edge of the seat fixing surface portion 16a constituting the upper surface side of the seat mount bracket member 16 to a vertical wall portion 16e extending substantially vertically. It is provided so that it may be united from the inclined side surface part 16d formed in an oblique manner.

  Further, a gusset member 18 is straddled between the side sill portion 4 and the extension front side member member 9 provided at the connection portion of the outer surface 3d of the front floor panel member 3 and the side groove portion 3e. ing.

  The gusset member 18 includes an outer joint flange portion 18a joined to the inner edge of the upper surface portion 4d of the side sill inner member 4a and an inner side joined along the outer edge of the horizontal upper surface side 9a of the extension front side member member 9. The horizontal flange portion 18b has a flat plate-like inclined surface portion 18c that inclines the upper surface side 18d toward the inner side in the vehicle width direction and integrally joins the outer joint flange portion 18a and the inner horizontal flange portion 18b. And it is mainly composed.

  Then, the gusset member 18 has a solid line from the position indicated by the two-dot chain line in FIG. 7 due to the load input direction F from the side of the vehicle indicated by the white arrow in FIG. As shown, the deformation of the side sill portion 4 in the rolling direction R as shown by the alternate long and short dash line is suppressed so that the side sill portion 4 and the seat mount bracket member 16 do not interfere with each other even if it proceeds. It is configured.

  Moreover, in the first embodiment, as shown in FIG. 6, the inclined surface portion 18c of the gusset member 18 is spaced from the inclined side surface portion 16d of the seat mount bracket member 16 by a predetermined distance W in the vehicle width direction. Is installed.

  Next, the effect of the vehicle body floor part structure of Example 1 of this embodiment will be described.

  In Example 1, in addition to the function and effect of the vehicle body floor structure of the above embodiment, as shown in FIG. 6, the inclined surface portion 18c of the gusset member 18 has the inclination of the seat mount bracket member 16. Attached from the side surface portion 16d at a predetermined interval W in the vehicle width direction.

  For this reason, when the load input F from the side of the vehicle is applied to the side sill portion 4 from the position indicated by the two-dot chain line in FIG. 7 as indicated by the white arrow in FIG. 7, the battery B is accommodated. Before the load input F is transmitted to the storage space 3b, first, the extension front side member 9 is positioned from the existing gusset member 18 located between the side sill 4 and the battery B. It is transmitted to the outer surface 3d extending to the lower part of the component storage recess 3c of the provided front floor panel member 3 and the connecting portion of the side groove 3e.

  Since the gusset member 18 and the extension front side member member 9 are configured to have relatively high rigidity, before the seat mount bracket member 6 is moved and deformed, as indicated by a solid line in FIG. The load input F causes the side groove 3e of the front floor panel member 3 to be bent and deformed.

  However, even if the side sill portion 4 advances from the position indicated by the two-dot chain line in FIG. 7 to the inner side in the vehicle width direction due to this buckling deformation, the side sill portion 4 and the gusset member Since 18 is disposed with a certain distance W from the seat mount bracket member 16, it is difficult to reach and there is little possibility of interference.

  Further, even if the outer side surface 3d of the storage space 3b is pressed via the extension front side member member 9, the side surface of the battery B side of the outer side surface 3d contacts the side surface B1 of the battery B.

  For this reason, the load input F is distributed over a relatively wide range, and the battery B can be reliably protected.

  Other configurations and operational effects are the same as or equivalent to those of the above-described embodiment, and thus description thereof is omitted.

  As mentioned above, although Embodiment and Example 1 of this invention were explained in full detail with reference to drawings, the concrete structure is not restricted to this Embodiment and Example 1, and does not deviate from the summary of this invention. A degree of design change is included in the present invention.

  That is, in the above-described embodiment and Example 1, the battery B as an article requiring protection is stored and held in the component storage recess 3c, but the present invention is not limited thereto. For example, as long as it is provided at the center of the floor panel member as an article requiring protection such as a fuel tank or an electronic device, the shape, quantity, and use and type of the article are not particularly limited.

  Further, the interval W between the fragile portion 7 of this embodiment and Example 1 has a step where the vertical cross-sectional shape along the vehicle front-rear direction suddenly changes in the vehicle width direction, or between the inclined surfaces. However, the present invention is not limited to this. For example, the weakened portion may be formed by reducing the plate thickness, using a seam between parts, or forming a slit. Therefore, the upper surface of the seat fixing surface portion 6a of the seat mount bracket member 6 is bent and deformed toward the outside in the vehicle width direction as the side sill portion 4 advances in the vehicle interior direction. As long as it promotes, the shape, quantity and material are not particularly limited.

  Further, in addition to the configuration of the embodiment and Example 1, in the automobile 1 provided with the center pillar member, when the load input F is applied to the center pillar member, the side sill inner member 4a and the side sill outer member 4b are provided. The side sill portion 4 constituted by the extension front side member member 9 receives and absorbs load transmission in the direction of deformation in the rolling direction R indicated by the one-dot chain line in FIG. The input can be made difficult to be transmitted to the outer surface 3d of the storage recess 3c.

  Accordingly, the cross-sectional shape of the side sill portion 4 and the shape, quantity and material including the presence or absence of the center pillar member are not particularly limited.

2 Floor portion 3 Front floor panel member 4 Side sill portions 6, 16 Seat mount bracket members 6a, 16a Seat fixing surface portion 7 Fragile portions 8, 18 Gusset member B Battery (parts requiring protection)
W interval

Claims (3)

A vehicle body floor portion having side sill portions extending in the longitudinal direction along the vehicle longitudinal direction at both ends in the vehicle width direction of the floor panel member, and a component to be protected is arranged at the center portion of the floor panel member In structure
In the load input direction from the side of the vehicle, a seat mount bracket member is provided at a position between the side sill portion and the part requiring protection,
The seat mount bracket member extends along the vehicle front-rear direction so that the seat fixing surface portion of the seat mount bracket member promotes bending deformation toward the outside in the vehicle width direction as the side sill portion advances in the vehicle interior direction. The vehicle body floor structure characterized in that the vertical cross-sectional shape has a fragile portion having a step in the vehicle width direction . The vehicle body floor structure according to claim 1, wherein a gusset member is straddled at a position between the side sill portion and the part to be protected that is lower than the fragile portion. A vehicle body floor portion having side sill portions extending in the longitudinal direction along the vehicle longitudinal direction at both ends in the vehicle width direction of the floor panel member, and a component to be protected is arranged at the center portion of the floor panel member In structure
In a load input direction from the side of the vehicle, a seat mount bracket member having an inclined side surface portion formed obliquely at a position between the side sill portion and the protection target component is provided.
Between the side sill portion and the floor panel member, a gusset member is straddled ,
The gusset member rolls off the side sill portion so that the side sill portion and the seat mount bracket member do not interfere even when the floor panel member is buckled and deformed in the load input direction from the side of the vehicle. The vehicle body floor structure according to claim 1, wherein the gusset member is mounted at a predetermined interval in a vehicle width direction from an inclined side surface portion of the seat mount bracket member while suppressing deformation in a direction.

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