| 摘要 |
PURPOSE:To simplify survey the bearing force of the ground against a small building by a method in which a rod is penetrated into the ground by means of a driver connected to a wire by releasing the wire at a given interval of period, and the penetration degree of the rod is automatically reduced. CONSTITUTION:When a driver 5 is operated, a cam 4 is operated, a wire 3 wound around a winding drum 2 is released, a hammer 20 is dropped, and a rod 1 is penetrated into the ground by the rod 1. The wire 3 is wound around the drum 2 and the hammer 20 is again pulled up. When the rod 1 is penetrated, a wheel 6 is turned, the rotation is transmitted to a winding and feeding shaft 14 by a universal joint 11, and a recording paper 12 is sent out and recorded by a writing tool 13. |
