| 摘要 |
PURPOSE:To properly detect a board for whether it is provided or not even when the board is any of board with a low refection coefficient of light, board formed with fixing screw holes, board formed out of transparent material, etc., in a part mounting device for mounting various parts relating to the board. CONSTITUTION:Detecting means, provided with light emitting and receiving means D, E to detect whether an article is provided or not by means of transmitting light, are set up so as to be opposed and tilted in vertically displaced positions by interposing a board 1. |
