| 摘要 |
A soil cultivating implement has a row of tined soil working members extending transverse to the direction of travel. An implement-supporting and soil-working cage-formation ground roller is arranged behind said soil working members to be rotatable about a substantially horizontal axis. The roller has a plurality of relatively spaced apart carrier discs fixedly interconnected by a plurality of tubular elongate elements that are wound helically around the axis of rotation of the roller. When light and/or dry soil is to be cultivated, it is desirable that additional elongate elements should be placed in the skeletal cylindrically curved ground-engaging surface of the roller. A chosen number of auxiliary elongate elements can be arranged between the fixed elongate elements quickly and these elements are easily detachable and re-connectable. Each auxiliary element is positively secured only to the two outer carrier discs and one end of each auxiliary element carries a pin that is enterable in a hole in an outer disc. The opposite end of said element carries locking means comprising a pair of spaced tongues and a spring-loaded retaining pin which co-operates with holes in the tongues and with one of the holes in the opposite outer end carrier disc that is sandwiched between the tongues. Single bolts may, if preferred, be employed in place of the spring-loaded retaining pins. Each carrier disc has crescent-shaped peripheral recesses and each auxiliary elongate element carries crescent-shaped stops which lodge in the matchingly shaped recesses when installed. Preferably, each auxiliary element is of helical configuration and can be resiliently pre-stressed to some extent before retaining engagement of the corresponding pin or bolt so that the stops are urged, with some pre-stressing, into the peripheral recesses of the carrier discs.
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