Lens grinding apparatus for grinding an eyeglass lens from a plurality of directions

A lens grinding apparatus for performing frame-fit processing on an eyeglass lens, comprising:

• input means for receiving data necessary to produce frame-fit processing data:
• lens holding shafts for holding a subject lens in between;
• means for rotating the lens holding shafts;
• a plurality of grinding-wheel shafts on each of which at least one grinding wheel for lens grinding is mounted:
• means for rotating each of the plurality of grinding-wheel shafts;
• first moving means for moving the plurality of grinding-wheel shafts toward a rotation axis of the lens holding shafts, to grind the subject lens;
• and
• control means for controlling the grinding-wheel shafts moving means based on the frame-fit processing data,
• wherein the lens holding shafts rotating means rotates the lens holding shafts individually and synchronously.

A lens grinding apparatus for performing frame-fit processing on an eyeglass lens, comprising:

• input means for receiving data necessary to produce frame-fit processing data:
• lens holding shafts for holding a subject lens in between;
• means for rotating the lens holding shafts;
• a plurality of grinding-wheel shafts on each of which at least one grinding wheel for lens grinding is mounted:
• means for rotating each of the plurality of grinding-wheel shafts;
• first moving means for moving the plurality of grinding-wheel shafts toward a rotation axis of the lens holding shafts, to grind the subject lens;
• and
• control means for controlling the grinding-wheel shafts moving means based on the frame-fit processing data,
• wherein the grinding-wheel shafts rotating means includes means for detecting torque of motors for respectively rotating the plurality of grinding-wheel shafts, and the control means causes the grinding-wheel shafts moving means to stop moving the plurality of grinding-wheel shafts toward the subject lens when the torque of at least one of the motors has reached an upper limit value.

A lens grinding apparatus for performing frame-fit processing on an eyeglass lens, comprising:

• input means for receiving data necessary to produce frame-fit processing data:
• lens holding shafts for holding a subject lens in between;
• means for rotating the lens holding shafts;
• a plurality of grinding-wheel shafts on each of which at least one grinding wheel for lens grinding is mounted:
• means for rotating each of the plurality of grinding-wheel shafts;
• first moving means for moving the plurality of grinding-wheel shafts toward a rotation axis of the lens holding shafts, to grind the subject lens;
• control means for controlling the grinding-wheel shafts moving means based on the frame-fit processing data;
• and
• second moving means for moving the plurality of grinding-wheel shafts in a longitudinal direction thereof relative to the subject lens, wherein the control means further controls the second moving means based on the frame-fit processing data.