Patent ID: 7261350

Claim:
A vacuum pick and place device comprising: a plurality of pick and place nozzles, providing a lifting portion opened with an air suction port and an air suction hole where a flow rate of air sucked in from said air suction port becomes a sonic speed by a vacuum pressure, for lifting individual parts at said lifting portion by sucking in air through said air suction hole from said air suction port, a plurality of air suction passages connected to each of said plurality of pick and place nozzles, a pipe to which said plurality of air suction passages is connected in parallel, a vacuum supply unit which is connected to said pipe, and, which supplies a vacuum through said pipe and said plurality of air suction passages to each of said plurality of pick and place nozzles with which a pressure at said air suction port is at least approximately twice a pressure at a downstream end of said air suction hole, and a plurality of pick and place confirming sensors which are provided in each of said plurality of air suction passages, and, which measure a flow rate of air sucked in from said air suction port of said pick and place nozzle and output an electrical signal indicating the presence or absence of a part lifted to said lifting portion on the basis of the measured flow rate.