| 摘要 |
PROBLEM TO BE SOLVED: To provide a metallic expanded anchor capable of preventing neutralization of concrete from a drilled hole portion. SOLUTION: A core body provided with an expanded head portion and a screw portion on the other end, a cylindrical body fitted in the core body and provided with a cut groove on the expanded head portion side, seal material filling a gap between the cylindrical body and the core body and not interfering with sliding capability between the cylindrical body and the core body, and the expanded head portion side of an anchor bolt having the seal material shielded at the outside of the cylindrical body so as to have an outer periphery larger than the inner periphery of the insertion hole of the concrete are inserted together with the cylindrical body while deforming the seal material layer into the gap between the cylindrical body and the insertion hole of the concrete surface, and a bottom of an expanded opening portion having the cut groove of the cylindrical body is expanded at an expanded bottom head portion to be fixed at the concrete. After fixing of the anchor bolt, the hole provided at the concrete is completely cut off from an outside air, thus preventing neutralization of the concrete at the hole inner portion. COPYRIGHT: (C)2005,JPO&NCIPI
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