| 摘要 |
<p>An anchor bolt (2) comprises: a shaft part (4) with a male screw thread (4b); and a head part (3) connected to the shaft part (4) and having an attachment hole (14) with a closed-end bottom to receive a bolt (60) therein defined at a tip surface (3a) of the head part (3) and a breaking groove (12) provided at an outer side surface of the head part (3). The breaking groove (12) is formed at an outer surface of a portion in which the attachment hole (14) is defined. A torque equal to or greater than a fixed value exerted on a tip portion between the tip surface (3a) and the breaking groove (12) of the head part (3) causes the breaking groove (12) to be broken, thereby causing the tip portion between the tip surface (3a) and the breaking groove (12) of the head part (3) to be removed.</p> |
