| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rotary internal tooth saw using an internal tooth saw plate having a circular state and internal teeth at its inner circumference and used as a saw having wide uses such as for a high branch-cutting saw, etc. SOLUTION: This saw is provided by supporting each of the outer circumference part of a circular internal tooth saw plate 4 divided into two, with a pair of holders 3 and maintaining the internal tooth plate 4 as the circular state in a state of closing the holders 3. By driving for rotating the internal tooth saw plate 4, maintained as the circular state, of which outer circumferential part is supported by the holders, the internal tooth B cuts the material A to be cut. The rotating internal tooth saw plate 4 is made as capable of being stopped at a prescribed position of the holders 3, and each of the divided internal tooth saw plate 4a, 4b are held in the holders which can be opened up and closed down so that the material A to be cut can be positioned in the internal tooth saw plate 4. In order to introduce the material A to be cut into the internal tooth saw plate 4, one part of the circular internal tooth saw plate 4 may be cut off and the cut part may be made as capable of being opened up.</p> |
