| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sleeper sufficiently securing the flexural rigidity of sleeper bodies while securing high integrity of the sleeper bodies and connecting members. <P>SOLUTION: The sleeper 1 includes the sleeper bodies 2 and the connecting members 3. The sleeper body 2 includes sleeper small pieces 7 forming an intermediate layer 4, an upper side sleeper member 5 and a lower side sleeper member 6, and the connecting member 3 includes a core layer member 12 and a core reinforcing member. The upper side sleeper member 5 and the lower side sleeper member 6 are formed in long-sized shape, and provided with partially notched fitting parts in the longitudinal-side side faces so as to be orthogonal to the longitudinal direction. The end side of the core reinforcing member 13 is fitted into the fitting part, and the end side of the core layer member 12 is fitted between the sleeper small pieces 7 of the intermediate layer 4. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
