摘要 |
PURPOSE:To inspect accurately and speedily weld nuts, one by one, by feeding the weld nuts on tact basis in a horizontal array, and measuring each nut at three points simultaneously. CONSTITUTION:Weld nuts N to be inspected are arrayed by a parts feeder and supplied, one by one, in an array to an inspecting device through a shoot. Three inspection gauges 8a-8c provided in the middle of their feed path are confronted with the weld nuts N fed on tact basis and elevated or lowered simultaneously. Lower gauges 13 and 16 confronted with the 1st and the 3rd inspection gauges 8a and 8c are pressed down to obtain variation the gap of a nozzle 15 connected to an electronic automatic air micrometer facing the lower gauges, and the leg length of each nut, whether a leg is present or not, and whether a screw hole diameter is normal or not are detected from an increase or decrease in the set amount of discharge air. Then, whether a screw thread is normal or not is detected from variation in the amount of discharge air supplied from the automatic air micrometer to the 2nd inspection gauge 8b. |