Patent ID: 8172640
Filing Date: 2012-05-08
Classification: B24B

Abstract:
1. An eyeglass lens processing apparatus comprising: a processing apparatus body which includes, a lens rotation unit having a lens chuck shaft for holding and rotating a lens, a movement unit for changing an axis-to-axis distance between the lens chuck shaft and a grindstone rotating shaft by relatively moving the lens chuck shaft with respect to the grindstone rotating shaft, and a grinding water supply unit having a nozzle for ejecting grinding water to a portion to be processed of the lens; a centrifugal separator which includes a dewatering bin for receiving the grinding water containing processing refuse via a drainage port of the processing apparatus body and a drainage pipe and a motor for rotating the dewatering bin, and which separates the processing refuse from the grinding water by rotating the dewatering bin so as to discharge the grinding water to an outside of the dewatering bin; a calculation control unit which includes a counter for multiplying an amount of the processing refuse on the basis of a predetermined control signal of the apparatus and a memory for storing an extraction reference of the processing refuse provided to maintain filtering efficiency of the dewatering bin, and which generates an alarm signal when the multiplied processing refuse amount reaches the processing refuse extraction reference; an alarm unit which alarms that the processing refuse collected in the dewatering bin needs to be extracted on the basis of the alarm signal by use of at least one of a buzzer and a display; and a reset signal input switch which inputs a reset signal for resetting the multiplied processing refuse amount of the counter; wherein the counter multiplies the processing refuse amount by counting the number of the processed lenses, the number of the processed lenses being counted on the basis of the control signal; and wherein the calculation control unit generates the alarm signal indicative of a predetermined multiplied processing refuse amount lower than the processing refuse extraction reference and controls the alarm unit to alarm the predetermined multiplied processing refuse amount.