| 摘要 |
<p>An assembly apparatus has a plurality of stationary work stations spaced apart in a transport direction extending downstream from a holding station, a plurality of holders each adapted to carry a respective workpiece and each formed with at least one downwardly directed entrainment tooth, an upstream conveyor for feeding the holders in a row to the holding station, and a downstream conveyor extending downstream from the holding station past the work stations and including a belt formed with external teeth meshable with the teeth of the holders. A blocking element at the holding station can move between a position preventing downstream movement of the holders past the holding station and a position permitting such downstream movement. An intermediate conveyor at the holding station has another belt formed with external teeth and displaceable between a lower position with its belt out of engagement with the workpieces at the holding station and an upper position with its teeth engaging the tooth of the farthest downstream holder in the station. The belts can be advanced for conveying downstream and through the stations any holder whose tooth is engaged with the belt teeth. A rotary output cam and a push-pull actuator operated thereby and connected to the tools, to the intermediate conveyor, and to the blocking element simultaneously move the blocking element into the freeing position and raising the intermediate conveyor into the upper position to pick the farthest downstream holder off the row and advance it onto the downstream conveyor.</p> |
