Simple supporting device

The utility model discloses a simple supporting device which comprises a support, a roller is arranged on the supporting face of the support, rotating shafts are arranged on the straight faces of the two ends of the roller, lower vertical plates are arranged on the inner sides of the circumferential faces of the rotating shafts, the lower ends of the lower vertical plates and the support are fixedly arranged, and a U-shaped connecting plate is arranged on the outer end face of each lower vertical plate. An upper vertical plate is fixedly arranged at the upper end of the [-shaped connecting plate, the lower end of the upper vertical plate is arranged on the outer side of the circumferential face of the rotating shaft, a plurality of notches are formed in the end face of the upper vertical plate at equal intervals, a limiting transverse plate is transversely arranged in each notch, and outer supporting square grooves are formed in the two sides of the outer end of each limiting transverse plate and located on t