| 摘要 |
<p>[Problem] To provide a blade sharpener or grinding machine having a relatively wide grindstone surface and in which all sections of the grindstone surface move at a uniform velocity. [Solution] The blade sharpener comprises a face plate (20) on the upper surface of which a grindstone is affixed and a parallel movement-revolving mechanism for revolving the face plate (20) so that all sections of the upper surface thereof move in parallel. Rotation of the face plate (20) itself is limited by multiple springs (71). The parallel movement-revolving mechanism comprises: a motor (40); an eccentric revolution axis (51) that is deviated from the revolution axis (41) of the motor (40); a bearing (53) that is fitted onto the eccentric revolution axis (51); and a bearing holder (55) that houses the bearing (53) and is installed on the face plate (20). By the eccentric revolution of the eccentric revolution axis (51), the bearing holder (55) and the face plate (20), which is fixed to said holder (55), oscillate with a parallel revolving motion. That is to say, all sections of the entire surface of the face plate (20) move on the circumference of circles of the same diameter without the face plate itself rotating. As a result, all spots on the entire surface of the upper surface of the face plate (20) move in a circle of the same diameter at the same revolution speed, in other words, at a uniform velocity.</p> |
