which plates 602 a and 602 b are placed perpendicular to it plates 602 a work in conjunction with the support supports 117 to join the support with wheels 600 to the container 100 through the parallelogram mechanism 702 at the same time it joins these two elements the mechanism 702 may also move the container 100 upwards parts of the plates 602 a include elements that point towards the support 600 such elements include boreholes with bushing two per plate these boreholes work in conjunction with boreholes provided in one of the ends of the parallelogram 702 this set of boreholes join pivotally there between by appropriate means the opposite end of the parallelogram mechanism works the same way with the holes with bushing of the supports 117 the parallelogram mechanisms 701 702 include a top part and a bottom part wherein the top part is actuated by a piston ps 5 or ps 4 in the case of the parallelogram 701 see fig5 and 13 through an exiting element of the parallelogram placed at the bottom of the top element thereof the lower end of the parallelogram mechanisms follows the movement of the top end the other end of the piston ps 5 or ps 4 as appropriate joins the support 600 as shown in fig1 finally at the interior part of the plates 602 a a support shaft 608 is located for the wheels r of the scraper the support 600 includes a pair of push elements.