| 摘要 |
The present invention relates to a bolt fastening device to combine composite structures. The bolt fastening device of the present invention comprises; a lower part insert that is inserted to have a holding part at the lower end to be held by a structure in being inserted in a combining hole formed in the structure and has a hollow hole; an upper part insert that is inserted to have a holding part at the upper end to be held by a structure in being inserted in a combining hole formed in the structure while the lower part is inserted in the hollow hole of the lower part insert and has a hollow hole; a bolt with the head part held at an upper side of the holding part of the upper part insert and the lower part penetrating through the hollow holes of the lower part insert and the upper part insert in being inserted in the hollow hole of the upper part insert; and a nut combined while pressing the lower end of the lower part insert in being spirally combined with the bolt, and at least one of the structures is characterized to be a composite structure. When the bolt fastening device to combine composite structures according to the present invention is used, there are features that there is no damage to composites and combining forces can be solidly maintained since structures can be combined in a form to minimize gaps. |
