Abstract: A rotary type electrostatic spray painting device comprising a rotary shaft and a spray cup-shaped head fixed onto the front end of the rotary shaft. Paint is fed onto a cup-shaped inner wall of the spray head. The rotary shaft is supported by a single thrust air bearing, a pair of radial air bearings, and a non-contact type rotary shaft supporting device having a permanent magnet. The permanent magnet is arranged near a circumferential outer wall of a hollow portion of the rotary shaft for supporting the rotary shaft by the attracting force of the permanent magnet. An electrode, continuously contacting the rear end of the rotary shaft, is provided. A negative high voltage is applied to the housing of the paint device. In addition, the negative high voltage is also applied to the spray head via the electrode and the rotary shaft.

Abstract: A rotary type electrostatic spray painting device comprising a rotary shaft and a spray head fixed onto the front end of the rotary shaft. Paint is fed onto the cup-shaped inner wall of the spray head. The rotary shaft is supported by a single thrust air bearing and a pair of radial air bearings. An electrode, continuously contacting the rear end of the rotary shaft, is provided. A negative high voltage is applied to the housing of the paint device. In addition, the negative high voltage is also applied to the spray head via the electrode and the rotary shaft. The spray head comprises a spray head body and a spray head supporting member. The spray head body has a cylindrical inner circumferential wall which is fitted onto the cylindrical outer circumferential wall of the spray head supporting member. A radially inwardly projecting annular projection is formed on the rear end of the cylindrical inner circumferential wall of the spray head body.