Tensioning device for built-in shutter overturning rope of hollow glass

A tensioning device of a shutter turning rope is arranged in the hollow glass. Relates to the technical field of built-in sunshade shutter hollow glass. Comprising a gusset connecting seat, a tensioning wheel and a turnover traction rope, the gusset connecting seat is provided with a cross arm and a vertical arm, the turnover traction rope is wound on the tensioning wheel, and the turnover traction rope is perpendicular to the axis of the tensioning wheel; the tensioning wheel is connected to the gusset connecting base through a balance type elastic restraining device, so that the upward pulling force applied to the tensioning wheel by the overturning traction rope and the downward pressure applied to the tensioning wheel by the balance type elastic restraining device are located on the same plumb line. The tensioning device is exquisite in structure and reasonable in mechanical property, flexible and reliable operation of the turning traction rope in long-term use can be ensured, and the long-term reliabilit