| 摘要 |
PCT No. PCT/JP97/02072 Sec. 371 Date Jan. 28, 1998 Sec. 102(e) Date Jan. 28, 1998 PCT Filed Jun. 16, 1997 PCT Pub. No. WO97/48911 PCT Pub. Date Dec. 24, 1997A self-drilling anchor having a self-drilling function includes a body and a pin. The body includes a head and a shank extending from the head downward. The head is of a shape similar to the head of a hexagonal bolt such that the head may engage with the rotary member of an electric rotary tool. The shank is in the form of a column having a constant outer diameter, having helical grooves formed on its outer periphery. The body includes in its core an opening portion with a constant inner diameter extending from the upper end toward the top end. A slit is formed on the top end portion of the shank to extend from its tip to the opening portion so as to divide the top end portion into two. The slit is engaged with the drilling edge to hold it. Completion of a self-drilling anchor is achieved by fitting the pin into the opening portion of the body.
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