| 摘要 |
Disclosed is an apparatus for adjusting verticality of a leader having a first coupling unit which comprises: a shaft formed of a column shape with the direction of length in parallel with Y axis and fixated to a boom; a first spherical body provided at one side of the shaft; a second spherical body provided at the other side of the shaft; and a bracket having one side fixated at an upper part of the leader and the other side provided with a first bracket arm holding at least one portion of the first spherical body and a second bracket arm holding at least one portion of the second spherical body, thereby efficiently adjusting the verticality of the leader and enhancing reliability. |
