Abstract: A vehicle lower portion structure has: a tunnel portion disposed at a vehicle transverse direction central portion of a floor portion; a front side member whose rear portion is disposed at a vehicle lower side of the floor portion and a vehicle transverse direction outer side of the tunnel portion; a first member including a first horizontal wall that extends from the rear portion toward a vehicle transverse direction inner side, and a first vertical wall bent toward a vehicle upper side from the first horizontal wall; and a second member spanning an opening portion of the tunnel portion. The second member includes a second horizontal wall, and a second vertical wall that is bent toward the vehicle upper side from the second horizontal wall, is disposed parallel to the first vertical wall, and is joined to the first vertical wall.

Abstract: A vehicle lower portion structure has: a tunnel portion disposed at a vehicle transverse direction central portion of a floor portion; a front side member whose rear portion is disposed at a vehicle lower side of the floor portion and a vehicle transverse direction outer side of the tunnel portion; a first member including a first horizontal wall that extends from the rear portion toward a vehicle transverse direction inner side, and a first vertical wall bent toward a vehicle upper side from the first horizontal wall; and a second member spanning an opening portion of the tunnel portion. The second member includes a second horizontal wall, and a second vertical wall that is bent toward the vehicle upper side from the second horizontal wall, is disposed parallel to the first vertical wall, and is joined to the first vertical wall.

Abstract: A vehicle lower portion structure has: a tunnel portion disposed at a vehicle transverse direction central portion of a floor portion; a front side member whose rear portion is disposed at a vehicle lower side of the floor portion and a vehicle transverse direction outer side of the tunnel portion; a first member including a first horizontal wall that extends from the rear portion toward a vehicle transverse direction inner side, and a first vertical wall bent toward a vehicle upper side from the first horizontal wall; and a second member spanning an opening portion of the tunnel portion. The second member includes a second horizontal wall joined to the first horizontal wall, and a second vertical wall that is bent toward the vehicle upper side from the second horizontal wall, is disposed parallel to the first vertical wall, and is joined to the first vertical wall.

Abstract: A vehicle lower portion structure has: a tunnel portion disposed at a vehicle transverse direction central portion of a floor portion; a front side member whose rear portion is disposed at a vehicle lower side of the floor portion and a vehicle transverse direction outer side of the tunnel portion; a first member including a first horizontal wall that extends from the rear portion toward a vehicle transverse direction inner side, and a first vertical wall bent toward a vehicle upper side from the first horizontal wall; and a second member spanning an opening portion of the tunnel portion. The second member includes a second horizontal wall joined to the first horizontal wall, and a second vertical wall that is bent toward the vehicle upper side from the second horizontal wall, is disposed parallel to the first vertical wall, and is joined to the first vertical wall.

Abstract: The present disclosure relates to a vehicle lower section structure that may obtain efficient load transmission obliquely toward the rear side, even in the event of an oblique collision. A reinforcement member is coupled to one lower tunnel reinforcement, and is coupled to another a lower tunnel reinforcement on progression toward the rear side. Collision load transmitted to the reinforcement member is accordingly transmitted obliquely toward the rear from the one lower tunnel reinforcement to the other lower tunnel reinforcement. Namely, the vehicle lower section structure of the present disclosure is capable of obtaining effective load transmission obliquely toward the rear side even in the event of an oblique collision.

Abstract: The method and apparatus for manufacturing an artificial tooth crown which involves the formation of a metal crown, coating the crown with porcelain materials and subjecting the coated crown to high frequency vibrations of the order of 15 to 50 Hz to condense the porcelain materials and remove air and liquid therefrom prior to firing.