| 摘要 |
PROBLEM TO BE SOLVED: To enable a drive-in type anchor bolt to be easily pulled out of the ground with a simple structure and by a simple operation and thereby to provide an economical anchor bolt reusable after the pull-out. SOLUTION: This anchor bolt comprises: a cylinder body 1 provided with a screw 8 formed in the circumference of its upper part for screwing a nut 3 for fastening and fixing an installed article, and an expanding slot 2 axially formed in its lower part; and a pin 4 having a head 5 at its upper end, inserted into the cylinder body 1 to be driven into the ground 9 along with the cylinder body 1 for radially expanding the lower part of the cylinder body 1. An opening part 6 for inserting a tongue piece 7 engaged with the lower side of the head 5 of the pin 4 is formed on the side face of the nut 3 screwed to the screw 8 of the cylinder body 1, and when the cylinder body 1 is pulled out from the ground, the pin 4 is pulled out of the cylinder body 1 by inserting the tongue piece 7 into the opening part 6 and by loosening the nut 3.
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