Apparatus for processing the circumference of a spectacle lens with a finishing unit for chamfering and grooving

摘要

In an apparatus for processing a lens in accordance with data of the shape of a lens frame, chamfering and grooving of a lens having a small diameter are achieved by a simple mechanism. An apparatus comprises a holding shaft 41 which is disposed between a main rotating tool 50 and a finishing unit 7 and supports a lens 1 in a manner such that the lens can be freely rotated, a sensor for detecting the position of the lens 145 which detects the rotation angle of the holding shaft 41, a motor 45 for driving the holding shaft 41, a lens unit 4 which freely displaces the lens 1 towards the main rotating tool 50 or the finishing unit 7 based on the rotation angle and data of the shape of the lens frame, and a base unit 2 which displaces the lens unit 4 in the axial direction of the holding shaft 41. The finishing unit 7 is constituted with a rotating tool for chamfering 70 and a rotating tool for grooving 71 which are disposed along the holding shaft 41 at positions separated by a prescribed distance and a driving motor 72 connected to these rotating tools 70 and 71.