| 摘要 |
PROBLEM TO BE SOLVED: To lessen the deformation margin of a metal extension anchor after attachment and improve tensile proof stress. SOLUTION: A metal extension anchor extends to open the extension part 6 of an anchor body 1 at a slit 4 by press-fitting a cone 10. A wedge rib 13 directed toward the press-fitting direction of the cone 10 is provided by corresponding to the slit 4 on the outer peripheral face of the cone 10, the gap of the slit 4 opened in the form of V-shape of an extension part 6 extended by the press-fitting the cone 10 is buried with the rib 13, and a deformation margin is lessened to the direction of the slit 4 of the extension part 6 by tension force. In addition, a stopper wall 14 to which the open end 6a of the extension part 6 abuts is formed on the base part 11 of the cone 10, and the deformation margin is lessened to the direction of the axial line of the extended extension part 6.
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