Patent ID: 8052201

Claim:
A floor structure of a cabin disposed on a chassis frame and equipped with a bed behind a driver's seat, the structure comprising: a floor panel; and a reinforcement member, wherein the floor panel includes: a front-side floor portion that extends rearwards from a bottom portion of a front edge of the cabin and includes a seat-attachment portion supporting the seat from below; a rising portion that is bent at the rear edge of the front-side floor portion and extends upwards; and a rear-side floor portion that is bent at the upper edge of the rising portion and extends rearwards, and that includes a bed-attachment portion on which the bed is mountable, and the reinforcement member comprises a horizontal portion which is opposed to the bottom surface of the rear-side floor portion and extends in a front to rear direction of a vehicle substantially underneath the rising portion and substantially underneath the bed-attachment portion, and is joined to a middle portion of the bottom surface of the bed-attachment portion and at least any one of the bottom surface of the front-side floor portion and the rear surface of the rising portion so that the reinforcement member defines and forms a structure having a closed cross-section together with the rear-side floor portion in a vehicle-width direction.