| 摘要 |
A device for the simultaneous positioning of a plurality of electrical and/or electronic parts on a printed circuit board, comprising a transport holder with a number of vacuum openings and a grid which is arranged therebelow and which comprises a matrix of openings in which there are accommodated a number of magazines containing stacks of said parts, the device comprising means for advancing the stacks of parts until the uppermost part of each stack is in a position in which it can be lifted by vacuum in order to be transported to the printed circuit board. The transport holder is constructed as a flat box which can be connected to a vacuum pump and which has substantially the same circumferential dimensions as the grid. The upper side and the lower side of said box are provided with a hole pattern which corresponds to the matrix of openings in the grid. In each pair of associated holes a hollow vacuum pin is arranged in a sealing and slidable manner. The upper end of each vacuum pin is sealed. In the sidewall of each vacuum pin there is provided an opening, each pin being slidable in both its guides to an active and an inactive position in which said opening is situated inside and outside the vacuum box, respectively. |
