Convertible camper trailer

A convertible camper trailer comprising an oblong box base having opposed fixed parallel end walls and opposed fixed parallel side walls of substantially greater length than said end walls, a rectangular roof which is movable between a lowered position in which it engages the upper edges of the fixed walls of said box base and a raised position in which it is spaced above said fixed walls, said roof having opposed longitudinally-extending tracks on the underside thereof, opposed upper end wall sections, the lower edges of which are hingedly attached to the upper edges of each of the fixed end walls of said box base to adapt the end wall sections to pivot between folded position in which they are substantially perpendicular to said end walls when said roof is in lowered position and upright position in which they are coplanar with said end walls when said roof is in raised position, the upper portions of said end wall sections supporting opposed wheel means which engage the opposed tracks in the underside of the roof whereby movement of the upper end wall sections from folded to upright wall position causes said wheels to move in said tracks causing the roof to move from lowered to raised position, power means associated with said opposed upper end wall sections for moving said sections between folded and upright wall position while simultaneously moving said roof from lowered to raised position, and upper side wall extension panels hingedly mounted on the inside of said upper end wall sections, an extension assembly slidably mounted in each of said fixed side walls for sliding movement between closed position in which it is disposed within said box base and open position in which it extends outside said box base and beyond said fixed side wall, said extension assembly having a length less than the length of said fixed side walls and being centered within said fixed side walls so that end portions of said fixed side walls extend on each side of said extension assembly, said extension assembly comprising an extension base which is slidably mounted for movement in a direction perpendicular to said side wall, an upper side wall extension having a lower edge which is hingedly attached to said extension base and an upper edge which is hingedly attached to a roof extension panel, fastening means on the upper edge of said roof extension panel adapted to engage the roof, whereby when said extension assembly is in closed position said side wall extension and said roof extension are folded against said extension base and lie substantially parallel thereto and to each other and when said extension assembly is in open position said side wall extension is adapted to unfold to a position substantially perpendicular to said extension base and said roof extension is adapted to unfold to a position in which the fastening means thereof engage the roof, when the roof is in raised position, to connect the roof extension to the roof and support the extension assembly and said upper side extension panels are adapted to unfold from said upper end wall sections and to engage the upper edge of the fixed side walls and to engage the erect extension assembly to form upper side walls corresponding in length to the length of said end portions of said fixed side walls.