| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an excavator capable of excavating the sand ground of an N value of 10 or more and even banking including gravel, boulder and debris, which are conventionally difficult to be excavated by this kind of conventional device.SOLUTION: An installation surface of an excavation blade 3 is positioned in front of the other end of the excavation blade 3, and is also installed in a ratio of 1.0 in the rotary shaft 1 direction and 1.3-2.0 in the orthogonal direction to a rotary shaft 1 in a side view. An installation surface to the rotary shaft 1 of the excavation blade 3 is slantingly installed at an angle of about 45 degrees in the counterclockwise direction to the rotary shaft 1 when viewed from the rear of the central axis of the excavation blade 3 to the central axis of the excavation blade 3. A front surface of the excavation blade 3 presents a shape of being cut at an angle of 90 degrees in a side view to the rotary shaft 1. A cut line parallel to the rotary shaft 1 is carved in front of the excavation blade 3, and a part projecting by being divided by the cut line is constituted as a tip blade 6. A position of this tip blade 6 is constituted so as to be asymmetric by complementing mutual excavation positions in the excavation blade 3 overhanging to both sides.</p> |
