Double-pivoted re-ripping stage

摘要

For re-ripping work in roadways in underground mining, re-ripping stages are used which can be moved on the rail of the monorail conveyor via their heavy-duty beam and allocated transport trolleys. Via a parallelogram guide-bar linkage, a working platform is secured to the heavy-duty beam in a liftable and lowerable manner, optimum slewing and pivoting capacity for the working platform or the entire re-ripping stage being provided by the allocation of one ball-bearing slewing rim each in the connecting area between the parallelogram guide bar and the heavy-duty beam and between the parallelogram guide bar or the stop bracket and the working platform. In addition, the ball-bearing slewing rim allocated to the heavy-duty beam, with parallelogram guide bars and working platform, is allocated to a heavy-duty carriage which is displaceably arranged in the longitudinal direction of the heavy-duty beam. This provides on the whole for a re-ripping stage via which the brushing tunnel arranged in the roadway section not yet re-ripped can in each case also be put into the new working position or be appropriately directed. In addition, since the stop bracket acts on the working platform from below via the ball-bearing slewing rim, an optimum base is also provided for.