| 摘要 |
<p>PURPOSE:To provide a screw auger propulsion device which is small-sized and lightweight, at a low cost by arranging two guide shafts in parallel on an installation board and installing a shiftable board in a slidable manner on the guide shaft. CONSTITUTION:An installation board 1 is installed in a propulsion shaft. A motor-driven drilling machine 13 is fitted from the above into the fixed frame 12 of a motor-driven drilling machine by retreating a suftable board 5. At the same time, the top end 14' of a rotary shaft 14 is fitted into a fitting hole 10. Then, the rear end part of a top leading screw auger is installed on a chuck 8, and a cantilever state is generated. A top leading screw auger 19 is revolved through a horizontal driving shaft 7, etc., by revolving the motor-driven drilling machine 13. Then, the shiftable board 5 is shifted on the installation board 1 by a pinion 16 and a rack 15 under revolving a handle 18. At the same time, the top end part of the top leading screw auger 19 is inserted into the ground.</p> |
