| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a horizontal shank assembly connecting a work attachment mounting component that is not interfered by a stem beam.SOLUTION: A horizontal shank assembly is characterized by forming a composite bracket integrated with a vertical base plate for avoiding interference to a stem beam through a lower slope from the base end side of a horizontal shank, and connecting a work attachment base to the vertical base plate. Fulcrum bolt holes are formed in the vertical base plate, and two symmetric safety bolt holes are formed below the fulcrum bolt holes. In the upper part of the work attachment base, upper and lower two safety bolt holes selectively connected to the fulcrum bolt holes of the vertical base plate are formed. More preferably, the upper and lower two safety bolt holes selectively connected corresponding to the fulcrum bolt holes of the vertical base plate are formed in the upper part of the work attachment base. A second safety bolt hole selectively connected in the right and left safety bolt holes of the vertical base plate is formed below the lower fulcrum bolt hole of the work attachment base.</p> |
