SEGMENT JUNCTION STRUCTURE

PROBLEM TO BE SOLVED: To provide a segment junction structure capable of securely strongly locking joints for jointing both segments to each other, and securely holding locked conditions of the joints when both segments are jointed to each other. SOLUTION: In this junction structure 1, a rod-shaped male joint 3 is inserted into a space part surrounded by lock pieces provided around a rod-shaped base part of a female joint 4, so both segments 2, 2 to be jointed to each other can be more strongly connected and jointed to each other than by joints comprising a single base part in conventional junction structures. A lock part 3b of the male joint 3 is inserted into the space part surrounded by the lock pieces of the female joint 4, so the lock part 3b of the male joint 3 is locked to the lock pieces 4b of the female joint 4, thereby locked conditions of the joints 3, 4 can be securely held when both segments 2, 2 are jointed to each other.