The present design minimizes the present inventor has earlier application No. 20-2012-004249 a heading "Automatic rail for controlling the balance" in the configuration of the space wasted in accordance with the operation of the lever for the lever device such that w / lowering the tension roller and the tension ever possible forced lowering of the rollers, and is proposed for the automatic control rail balance the lever device of a new way the lever does not protrude outside the main body is applied.
The major component of the subject innovation is inserted into the spring in the upper of the configuration of the rail bogie for the earlier application automatically control lever device, instead of the articulated type having a plurality of hinge construction, by attaching the cannula to the support frame, the bottom portion of the tension roller fixing but it is inserted in a lower portion of the insertion tube for pressure application shaft rod and configured to batchi the spring; A bracket body fixed to the insertion tube from the insert ever possible w / lowering and; And a lever fixed to fastening the pressure rod and the axis of the insertion tube; Elevating guide of the insertion tube is formed by cutting the peripheral wall of the insertion tube can ever tightening the lever perpendicularly to guide the fall of the groove and the lever; Through-cutting of a bracket to guide the lowering of the lever and the groove; Pivoting guide of the inserted tube to be fixed by rotating the lever from the lowered guide groove to a side of the insertion tube at the top of the bracket groove; And a lever engagement grooves of the brackets; and it characterized in that it consists of a lifting lever pivotally device comprising a.