| 摘要 |
PROBLEM TO BE SOLVED: To provide an expandable anchor and its manufacturing method capable of lessening knocking resistance of an inserting member and enhancing tensile strength. SOLUTION: An anchor body 101 having a tapered-off through-hole 111 extended to an axial direction provides a slit 113 at a pointed head portion 112 of the anchor body 101. A knocking pin 102 is inserted into through-hole 111. A shape of a pointed head face of the anchor body 101 is a pseudo-polygon made of a plurality of arcs. The pointed head portion 112 is expanded so that the knocking pin 102 is inserted through the through-hole 111, and one circle is formed by the contours of the pointed head surface of the anchor body 101. |
