COLUMNAR BODY AND COLUMNAR BODY JOINT STRUCTURE

PROBLEM TO BE SOLVED: To surely perform the operation of connecting columnar bodies together. SOLUTION: A pair of an inside column portion 3 and an outside pipe portion 4, which can be fitted and connected together between the different columnar bodies, is provided in the state of being distributed at both ends. When the different columnar bodies are fitted together, an outward recess 5 provided on the outer peripheral surface of the inside column portion 3, and an inward recess 6 provided on the inner peripheral surface of the outside pipe portion 4 are disposed in such a manner as to be capable of facing each other. A connecting key 7 capable of being interposed across the outward and inward recesses 5 and 6 is provided in such a manner as to be capable of being housed in a temporary placing position to recede into the back from an entrance of the outward recess 5; a pulling mechanism 8 for pulling the connecting key 7 toward the inward recess 6 from the temporary placing position in a position to be interposed between both of the outward and inward recesses 5 and 6 is provided in the outside pipe portion 4; a holding mechanism 12 for positioning the connecting key 7 in the circumferential direction of the inside column portion 3 is provided; and an alignment mechanism 16 for aligning the pulling mechanism 8 and the connecting key 7 in a circumferential direction when fitting the inside column portion 3 into the outside pipe portion 4 is provided. COPYRIGHT: (C)2011,JPO&INPIT