Reciprocator for paint gun

A reciprocator for paint gun comprising a slider for mounting a paint gun, said slider slidably engaged with an upright rail fixed on a frame so that the slider may be capable of ascending and descending along the rail, fixed pulleys rotatably supported at an upper portion of the frame, movable pulleys rotatably supported on a common shaft below said fixed pulleys, the number of said movable pulleys being one less than the number of said fixed pulleys, a bracket for mounting said common shaft and supporting a movable rod, said movable rod having a threaded hole, a threaded rod threadably engaged with said threaded hole, one end of said threaded rod connected via a universal joint to a handle rotatably supported on the frame, and the other end of said threaded rod connected to one end of a connecting piece, a connecting rod having one end pivotably connected to the other end of said connecting piece and the other end pivotably connected to a crank pin, a winch device having a drum rotatably supported at a middle portion of the frame, said drum adapted to be rotated by means of a handle, and a wire led from said slider to said drum through said fixed and movable pulleys, said wire having its ends fixed on said slider and said drum.