| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform drilling by a drill which performs drilling using both of rotation and striking to a reinforced concrete structure even in a narrow space while eliminating the need of a large-scale jig, machine or temporary equipment. <P>SOLUTION: By a drill 4 which is assembled movably along a stand 5 fixed to a reinforced concrete structure 1 and performs drilling using both of rotation and striking, drilling is performed to the reinforced concrete structure 1. To put it concretely, after the drill 4 which performs drilling using both of rotation and striking is moved back along the stand 5 and integrally rotated at a distal end of the stand 5, a drilling rod is pulled out from a borehole, then a long drilling rod longer than the stand 5 is inserted to the borehole, the long drilling rod is mounted on the drill 4 which performs drilling using both of rotation and striking, and the borehole is drilled deeper than the length of the stand 5 by the long drilling rod mounted on the drill 4 which performs drilling using both of rotation and striking. <P>COPYRIGHT: (C)2013,JPO&INPIT |
