SPECTACLE LENS GROOVING MACHINE

To prevent damage resulting from a grooving process, in particular, resulting from a short distance from a groove which is liable to be caused on the rear surface of a negative lens.SOLUTION: A disk-shaped rotary processing tool for a spectacle lens grooving machine has a lens rotary shaft 160 and a tool rotary shaft 130 in which a shaft cross-sectional shape of a tip of a disk-like rotary tool used in a grooving machine disposed in a relation in which they have an inclining angle with respect to each other in a plane including both the shafts is that a tool cross-section on a side where the lens rotary shaft 160 and the tool rotary shaft 130 intersect at an inclining angle is a straight line extending to the tool rotary shaft 130, and a tool cross-section on a side where both the shafts are apart from each other is a straight line extending to the lens rotary shaft 160. In addition, a spectacle lens grooving machine equipped with the disk-like rotary processing tool for the spectacle lens grooving machine is provided.SELECTED DRAWING: Figure 9 【課題】溝掘加工、特にマイナスレンズの裏面で発生しやすい溝との距離不足による破損を防止する。【解決手段】レンズ回転軸１６０とツール回転軸１３０とを有し、両軸を含む平面内で互いに傾斜角を持つ関係に配置される溝掘機に用いる円盤状回転ツール先端の軸断面形状が、レンズ回転軸１６０とツール回転軸１３０が傾斜角で交わる側のツール断面はツール回転軸１３０に直行する直線であり、両軸が互いに離れる側のツール断面はレンズ回転軸１６０に直行する直線となる眼鏡レンズ溝掘機用円盤状回転加工ツールを提供する。また、この眼鏡レンズ溝掘機用円盤状回転加工ツールの装着された眼鏡レンズ溝掘機を提供する。【選択図】図９