| 摘要 |
<p>A catch carrier (28, 28'), on which a pair of conveying catches (30) is pivotally mounted, can be reciprocated along a guide (32). Catch carrier (28, 28') and conveying catches (30) are each connected, by a flexibly resilient band (42; 62), to a sheave (44; 64) which can be rotated backwards and forwards. The two sheaves (44, 64) are so arranged and their rotary movements are so phase-displaced in relation to one another that the bands (42, 62) push the catch carrier (28, 28') and the conveying catches (30) for each working stroke, then pivot the conveying catches (30 ) into an inoperative position and pull them back together with the catch carrier (28, 28'). In regions in which at least one of the bands (42, 62) is wrapped round them, the two sheaves (44, 64) are surrounded by guide members which prevent the bands from yielding under normal loading. Some of the guide members (82) can be moved away from the associated sheave (44) against the resistance of a spring arrangement (92) so that the bands (42, 62) can yield resiliently if they are overloaded during a working stroke. The two sheaves (44, 64) are connected by clamp couplings to their driving, stationary shafts and can be adjusted for different heights of can-body blanks by infinitely variable turning in relation to their shafts.</p> |
