Vehicle floor structure and method for manufacturing vehicle
A vehicle floor structure, in one aspect, includes a floor pan, an upper surface-side reinforcing member joined to an upper surface of the floor pan, and a lower surface-side reinforcing member joined to a lower surface of the floor pan. The floor pan is formed of a resin-coated steel plate, and a resin layer of the resin-coated steel plate includes a first resin layer formed on the upper surface of the floor pan and a second resin layer formed on a part of the lower surface of the floor pan that is in contact with the lower surface-side reinforcing member.
1. A vehicle floor structure comprising:
a floor pan;
an upper surface-side reinforcing member joined to an upper surface of the floor pan; and
a lower surface-side reinforcing member joined to a lower surface of the floor pan, wherein
the floor pan is formed of a resin-coated steel plate,
a resin layer of the resin-coated steel plate includes a first resin layer formed on the upper surface of the floor pan and a second resin layer formed on a part of the lower surface of the floor pan that is in contact with the lower surface-side reinforcing member,
the first resin layer is formed over the entire upper surface of the floor pan,
the second resin layer is formed only on a part of the lower surface of the floor pan including the part of the lower surface thereof in contact with the lower surface-side reinforcing member, and
the floor pan is formed of a tailored blank material in which a first resin-coated steel plate in which only the first resin layer is formed and a second resin-coated steel plate in which the first and second resin layers are formed are welded to each other.
2. The vehicle floor structure according to claim 1 , wherein each of the upper surface-side and lower surface-side reinforcing members is formed of a steel plate coated with no resin.
3. The vehicle floor structure according to claim 1 , wherein a thickness of the first resin layer is larger than that of the second resin layer.
4. The vehicle floor structure according to claim 1 , wherein each of the upper surface-side and lower surface-side reinforcing members has a hat-like shape in cross section perpendicular to a longitudinal direction thereof and is joined to the floor pan at a pair of flange parts extending in the longitudinal direction.
5. The vehicle floor structure according to claim 4 , wherein outer peripheries of the pair of flange parts joined to the floor pan are not coated with any rust-prevention sealer.
6. The vehicle floor structure according to claim 4 , wherein an overall shape of the flange parts are flat.
7. A vehicle floor structure comprising:
a floor pan;
an upper surface-side reinforcing member joined to an upper surface of the floor pan; and
a lower surface-side reinforcing member joined to a lower surface of the floor pan, wherein
the floor pan is formed of a resin-coated steel plate,
a resin layer of the resin-coated steel plate includes a first resin layer formed on the upper surface of the floor pan and a second resin layer formed on a part of the lower surface of the floor pan that is in contact with the lower surface-side reinforcing member
the upper surface-side reinforcing member is formed of a resin-coated steel plate, and
a thickness of a resin layer of the resin-coated steel plate of which the upper surface-side reinforcing member is formed is smaller than that of the first resin layer of the floor pan.
8. A vehicle floor structure comprising:
a floor pan;
an upper surface-side reinforcing member joined to an upper surface of the floor pan; and
a lower surface-side reinforcing member joined to a lower surface of the floor pan, wherein
the floor pan is formed of a resin-coated steel plate,
a resin layer of the resin-coated steel plate includes a first resin layer formed on the upper surface of the floor pan and a second resin layer formed on a part of the lower surface of the floor pan that is in contact with the lower surface-side reinforcing member
the lower surface-side reinforcing member is formed of a resin-coated steel plate, and
a thickness of a resin layer of the resin-coated steel plate of which the lower surface-side reinforcing member is formed is smaller than that of the second resin layer of the floor pan.