| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the bearing structure of a blade body cover (wheel guard) for a bearing body (cutting arm) or a driving section (engine) in a work cutting machine and to prevent the cutting operation from being hindered. SOLUTION: A work cutting device 13 is equipped with a bearing body 59 borne on a machine base 11 in a tiltable manner, a rotary blade body 60 borne on the bearing body 59, a blade body cover 61 and an engine 63 as a driving section borne on the bearing body 59 and rotating the rotary blade body 60. The whole work cutting device 13 is capable of being moved to the maching base 11. With the cutting operation to the bearing body 59, the rotary blade body 60 is moved to cut a rail 28. A cover bearing link device 62 and a driving section bearing link device are four-joint rotational restricted links as a true or approximate parallel motor mechanism moving so that an angle from the blade body cover 61 and engine 63 with the machine base 11 is kept in an approximately constant. Accordingly, the blade body cover 61 and engine 63 tilted together with the bearing body 59 are prevented from coming into contact with the rail 28 or other things around there, and the rail 28 can be surly cut off without hindering the cutting operation.</p> |
