| 摘要 |
<p>An anchor (1) comprises an anchor bolt (2) having a shaft (6) and a bolt head (5), a spreading sleeve (3) having spreading parts (22) provided at a tip portion of a tubular body (20) threadedly engaging with the shaft (6). The shaft (6) of the anchor bolt is composed of a thick shaft part (6a) connected to the bolt head (5), and a thin shaft part (6b) provided to be closer to the tip portion of the shaft (6). The thick shaft part (6a) is provided with a rupture portion (8) reduced in diameter. The rupture portion (8) is provided at a position spaced by a predetermined length from a step (7) between the thick shaft part (6a) and the thin shaft part (6b) and ruptures if torque of a predetermined value acts on the bolt head (5).</p> |
