| 摘要 |
PURPOSE:To simplify construction by providing an air passage, a compressed air intake, and a small hole between an inside cylinder body and a frame to enable air in both outside and inside cylinders to move in the opposite directions. CONSTITUTION:Nozzle bodies 2, 2' which are hollow cylinders, are provided in the through hole of a frame body 1, while air passages 4, 4' which are connected to air intakes 5, 5', are provided between the nozzle bodies 2, 2' and the outside cylinder bodies 1. Thereby, it is possible to switch over the same duct into either of two conditions of intake and exhaust, merely by controlling a compressed air in its being jetted out from either of the right and left inside cylinders 2, 2'. Accordingly, an air feeding and exhausting chageover device can be made compact and low cost. |
