ROTATION PRESSURE TYPE EXPANSION ANCHOR

摘要

The present invention relates to a rotation pressure type expansion anchor including: a body wherein an insertion part is provided between a plurality of fastening holes separated from each other, wherein a hinge hole is provided in the insertion part; a plurality of first expansion fingers inserted into the insertion part of the body; a support rod inserted into a support rod insertion hole of the body; a finger stopper having an engaging groove at the top and a screw groove at the bottom; an expansion transfer hole to join a spring member to a space between upper and lower supports at the top and the bottom to correspond to each other; a lever to connect a connection protrusion of the lower support to the first expansion finger; a hitting bar of which one end is screwed to the screw groove of the finger stopper and the other end has a hitting plate; a plurality of second expansion fingers hinged to the top of an upper support plate of the expansion transfer hole; and an expansion member connected to the top of the support rod to expand the second expansion finger while moving downward from the top of the support rod. Therefore, the first expansion finger is expanded by the elasticity of the spring member to be embedded into the bored ground to improve the bonding force of the anchor. The second expansion finger is expanded by the expansion member to be embedded into the bored ground to double the bonding force of the anchor.