| 摘要 |
<p>A grapple logging system, which includes a remote controlled grapple carriage, a cable yarder comprising at least two drums, one of which holds a haulback cable connected to the clamping carriage and another of which holds a mainline cable connected to a mainline activated timber grapple, a haulback block distal from the cable yarder for receiving a haulback cable from the cable yarder and directing it to the clamping carriage, irrespective of whether the haulback block is located on a higher or lower plane relative to the cable yarder, a haulback cable, running from one of the cable yarder's winch drums, underneath t h e at least one free running haulback sheave, around the haulback block and back to the clamping carriage, a mainline cable running from another one of the cable yarder's winch drums past the free running mainline sheave of the clamping carriage, to the mainline activated timber grapple.</p> |
