structure wire 19 is extended between tip joints 11 and between each of the tip joints and central joint 8 so that the distance between the joints can be adjusted by winding or unwinding the wire specifically joints with controlling mechanism 20 21 which have a mechanism for controlling the wound length of wire 19 and serve as tip joint and central joint are provided at each corresponding position these joint have a driving mechanism for winding or unwinding the wire by controlling the driving mechanism the length of the wire between the joints is adjusted so that the distances between the tips of the posts are always identical to each other thus the unfolded flexed and folded states of the frame structure are freely controlled by simply adjusting the length of the wire for a frame structure obtained by connecting a plurality of the frame structure shown in fig3 the unfolded flexed and folded states of such frame structure are arbitrarily controlled with ease by adjusting the length of the wire synchronously for all the frame structure containing the structural unit and the connecting posts in addition by adjusting the twelve wires extended between the joints shown in fig3 to the same length all the tips of.