| 摘要 |
PROBLEM TO BE SOLVED: To simplify and speed-up bare-joining work of a plurality of reinforcement knit bodies such as preassembled reinforcement cages, by forming an openable cover, a bolt hole, and a support projection at each edge of a long hollow cylinder. SOLUTION: A joint main body 1 has an openable cover 2 formed at each edge thereof, and the openable cover 2 has a circular hole 3 formed therein, into which reinforcements are slidably inserted. The joint main body 1 is longitudinally cut along the line X-X, to thereby obtain longitudinally divided half portions G, H. One of the longitudinally divided half portions G has a bolt hole 8 for a bolt screwed therein, and the other longitudinally divided half portion H has a support projection 5 formed thereon. The joint has a plurality of annular projections 4 formed on the internal surface thereof, from the openable cover 2 down to a predetermined depth. Further, the annular projections 4 enhance engagement between hardened mortar and the internal wall surface, to increase the joining performance of the joint. In addition, a side wall of the joint has an injection port 9 formed therein for use in injection and discharge of mortar. Therefore, hardening of the reinforcements until injection of the mortar and hardening of the same can be facilitated. |
