| 摘要 |
<p>An air suction passage (4A, 4B) is provided with an attraction confirming sensor (1) in the form of a gas flow sensor. In this attraction confirming sensor (1), the flow of air sucked in from an air suction port (33) in a attraction nozzle (2) is measured, and the presence or absence of a part attracted to the attraction nozzle (2) is detected on the basis of the measured result.</p> |
