Method for producing simple planetary gear device and simple planetary gear device

A simple planetary gear device, the small number of components, and other defects is spatially well-maintained to achieve minimal backlash does not occur. Includes a rotation supporting section (movable in the radial direction), the rotation support portion having a shaft center axis of the eccentric pin relative to the bracket, in use around the rotary support portion can be a dummy carrier rotatably supporting the planetary gears pin, and after adjusting the direction of the eccentric load planetary gear (14), the selected sun gear (14) and filled, and by a fixing means fixing the rear bracket pin dummy and a position eccentric direction, the dummy pull carriage pin, and the eccentric pin carriage (34) used in the actual transmission, the dummy carrier is determined by the position of the pin is pressed into the bracket body (30), so as to be closest to the inner gear (16) in a state with the internal gear (16) into engagement.