| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an excavating machine, capable of preventing slippage in the movement direction of the boring machine by an obstacle such as pipe or the like as soon as possible, having superior vibration-controllability and sound-controllability and to provide a propulsive pipe capable of being easily screwed and removed. SOLUTION: A conical trapezoidal excavating section, having an excavation means such as bit, cutter or the like around the circumferential surface putting a hydraulic motor placing a hydraulic pump as a driving source on an initial pushing device side in a rotatable manner, is provided to the front of the boring machine (1); a columnar chamfer member with the projected uneven front end is provided to the front of the excavating section, and projected stripes over a quarter of the circumference are provided to two symmetrical positions on the same circumference on the inside circumferential surface, in the rear of the boring machine; and at the same time (2), a plurality of projected stripes are arranged to provide female screw sections (3).</p> |
