JOINT CONSTRUCTION

PROBLEM TO BE SOLVED: To easily joint together such members as segments or the like without performing troublesome work. SOLUTION: A joint fitting 1 is constituted of a male type joint 2 having a joint bar 11 formed with a drawdown portion 15 with the diameter smaller than that of a taper portion 14 at the tip and a female joint fitting 3 having a female joint main body 21 linking the joint bar 11 to be inserted. Inside the housing 23, a pair of linking members 25 to which fitting recessed portions 30 with the diameter almost equal to a drawdown portion 15 of the joint bar 11 at the opposite side are provided. To a slide recessed portion 31 formed at one linking member 25, a slide projected portion 32 formed at the other linking member 25 is fitted and it is made rotatable around fitted portion as the center. A leaf spring 33 for urging in a direction for putting both of the linking members 25 nearer is provided. The joint bar 11 is inserted to the female joint main body 21, the joint bar 11 is clamped by an urging force of the leaf spring 33, the fitted recessed portion 30 is fitted to the drawndown portion 15, the male joint fitting 2 is linked to the female joint fitting 3, and segments S are jointed together.