| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an apparatus for cutting a diameter-expanded part which cuts the diameter-expanded part having high roundness. <P>SOLUTION: The apparatus for cutting a diameter-expanded part of a hole for implanting an anchor bolt includes: a diameter-expanding guide block 1 having guide grooves 1a on the peripheral surface thereof; a guide block supporting rod 2 extended to the base end of the diameter-expanding guide block; a diameter-expanding member 3 which has diameter-expanding edge bodies moving in the guide grooves to expand the diameter and is slid along the guide block supporting rod; a sleeve 4 the tip of which is connected to the base end of the diameter-expanding member which is arranged at the outer peripheral side of the guide block supporting rod to be slid freely in the longitudinal direction thereof and which has an oblong hole extending to the longitudinal direction of the axis at the base end thereof; a connection pin 5 for penetrating the oblong hole and a guide block supporting part to a direction perpendicular to the longitudinal direction of the axis; and a spring member 6 arranged between the connection pin and the sleeve. The guide grooves 1a are formed in at least four positions while leaving an equal space between the adjacent ones in the peripheral direction and the diameter-expanding edge body 3a is arranged in each guide groove 1a while leaving an equal space between the adjacent ones. <P>COPYRIGHT: (C)2012,JPO&INPIT |
