Patent ID: 7530443

Claim:
An angle changing device for an automatic conveyor system comprising: a slate conveyor having guiding grooves formed to cross the slate conveyor and to be separated from one another at a predetermined distance in parallel; lift units disposed to vertically cross the slate conveyer and to be separated from one another at a predetermined distance to lift a loaded material up from the guiding grooves of the slate conveyor for performing a rising and a falling operation by using one of an air pressure and an oil pressure; a forward/backward driving unit including a plurality of driving sprockets arranged between rails which are arranged in parallel to cross the slate conveyor between the lift units and to be separated from the one side of the lift units, and a driving motor for generating a power; a rotation guiding shaft pin fixed to be closed to the rails and the slate conveyor; and a turntable carrier unit including a moving plate traveling along the rails by the forward/backward driving unit for dynamically approaching to or retreating from the slate conveyor, and a rotating unit having a hollowed seating surface to stably seat the loaded material on the rotating plate while moving, and a rotating plate disposed with a rotation shaft for repeatedly rotating about the rotation shaft in a clockwise and a counter clockwise at a predetermined angle when the rotating guiding shaft pin catches the rotating plate while moving in a forward direction or in a backward direction.