Vehicle body structure

1. A vehicle body structure comprising:

a floor panel of a floor of a vehicle interior;

a left floor member having a left inclined portion inclined toward the outer side of a vehicle from the front of the vehicle toward the rear of the vehicle when viewed from the top, and a right floor member having a right inclined portion inclined toward the outer side of the vehicle from the front of the vehicle toward the rear of the vehicle when viewed from the top;

a battery support frame closer to the lower side of the vehicle than the left floor member and the right floor member; and

a fastening unit for fixing the battery support frame to the floor panel through the left floor member and the right floor member, wherein

the battery support frame is fastened to the floor panel at the left inclined portion and the right inclined portion through the fastening unit.

2. The vehicle body structure according to claim 1 , wherein

the left inclined portion is inclined toward the outer side of the vehicle, between an inclined left front end on the front side of the vehicle and an inclined left rear end on the rear side of the vehicle, and the right inclined portion is inclined toward the outer side of the vehicle, between an inclined right front end on the front side of the vehicle and an inclined right rear end on the rear side of the vehicle,

the battery support frame is fixed to the left inclined portion at the inclined left front end, an inclined left intermediate point between the inclined left front end and the inclined left rear end, and the inclined left rear end, and

the battery support frame is fixed to the right inclined portion at the inclined right front end, an inclined right intermediate point between the inclined right front end and the inclined right rear end, and the inclined right rear end.

3. The vehicle body structure according to claim 2 , wherein

the battery support frame comprises:

a first cross member having a left end portion fixed to the inclined left front end, and a right end portion fixed to the inclined right front end;

a second cross member having a left end portion fixed to the inclined left intermediate point, and a right end portion fixed to the inclined right intermediate point;

a third cross member having a left end portion fixed to the inclined left rear end, and a right end portion fixed to the inclined right rear end; and

multiple straight members fixed to the first cross member, the second cross member, and the third cross member and extending in the front-rear direction of the vehicle.

4. The vehicle body structure according to claim 1 , wherein

the left floor member and the right floor member are each a flanged member structure having a hat shape that has, in cross section, a both side flanged groove extending in the front-rear direction of the vehicle, and has a fastening through hole in a groove bottom portion, both side flanges being fixed to the floor panel,

the fastening unit comprises:

a flanged holder having the hat shape that has, in cross section, a both side flanged groove extending in a direction orthogonal to a direction in which the groove of the flanged member structure extends, and the both side flanges are fixed to the groove bottom portion of the flanged member structure; and

a tube nut that is disposed in a holder space surrounded by a groove wall portion of the flanged holder and a groove wall portion of the flanged member structure and has a female thread portion along an axial direction, and

the tube nut has an upper end portion fixed to a groove bottom portion of the flanged holder, and a lower end portion fixed to the groove bottom portion of the flanged member structure.

5. The vehicle body structure according to claim 2 , wherein

the left floor member and the right floor member are each a flanged member structure having a hat shape that has, in cross section, a both side flanged groove extending in the front-rear direction of the vehicle, and has a fastening through hole in a groove bottom portion, both side flanges being fixed to the floor panel,

the fastening unit comprises:

a flanged holder having the hat shape that has, in cross section, a both side flanged groove extending in a direction orthogonal to a direction in which the groove of the flanged member structure extends, and the both side flanges are fixed to the groove bottom portion of the flanged member structure; and

a tube nut that is disposed in a holder space surrounded by a groove wall portion of the flanged holder and a groove wall portion of the flanged member structure and has a female thread portion along an axial direction, and

the tube nut has an upper end portion fixed to a groove bottom portion of the flanged holder, and a lower end portion fixed to the groove bottom portion of the flanged member structure.

6. The vehicle body structure according to claim 3 , wherein

the left floor member and the right floor member are each a flanged member structure having a hat shape that has, in cross section, a both side flanged groove extending in the front-rear direction of the vehicle, and has a fastening through hole in a groove bottom portion, both side flanges being fixed to the floor panel,

the fastening unit comprises:

a flanged holder having the hat shape that has, in cross section, a both side flanged groove extending in a direction orthogonal to a direction in which the groove of the flanged member structure extends, and the both side flanges are fixed to the groove bottom portion of the flanged member structure; and

a tube nut that is disposed in a holder space surrounded by a groove wall portion of the flanged holder and a groove wall portion of the flanged member structure and has a female thread portion along an axial direction, and

the tube nut has an upper end portion fixed to a groove bottom portion of the flanged holder, and a lower end portion fixed to the groove bottom portion of the flanged member structure.