| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a joint structure for steel materials and a nut holding member, which tighten a bolt and a nut mutually, efficiently and securely and achieve excellent construction performance and economic performance. <P>SOLUTION: This joint structure is constituted by mounting the nut holding member 5 storing the nut 4 arranged while aligning with a bolt hole 11 formed at an end on one side face 1a at the end of each steel material 1, 1 and arranging a joint plate 2 having a bolt hole 12 agreeing with the bolt hole 11 on a side face 1b on the opposite side. The nut holding member 5 has a nut fitting-in part 5a in which the nut 4 is fitted to lock it, and the nut fitting-in part has a locking part 5b for holding the nut 4 in a state for preventing it from coming off. The bolt 3 is inserted while aligning the bolt holes 11, 12 formed in each steel material 1, 1 and the joint plate 2 with a position of the nut 4 and is screwed into the nut 4 to push and widen the locking part 5b when the nut 4 is moved in the direction of a head part of the bolt 3 by screwing-in force and release the state for preventing the nut from coming off for bolt joint. <P>COPYRIGHT: (C)2011,JPO&INPIT |
