| 摘要 |
Disclosed herein is an automatic pallet exchanger of a machine tool, which can exactly decide a position of a pallet exchanging operation, and which can improve stability in operation. The automatic pallet exchanger includes an APC driving shaft ( 30 ) rotatably and elevatably standing on an APC body ( 20 ); an APC arm ( 40 ) supported on the APC shaft ( 30 ) for exchanging pallets of a processing area and a waiting area; rotating means for rotating the APC driving shaft ( 30 ); a cylinder ( 80 ) inserted on the APC driving shaft ( 30 ) and fixed on the APC body; a piston mounted on the APC driving shaft ( 30 ) for elevating the APC driving shaft ( 30 ) according to hydraulic pressure direction within the cylinder ( 80 ); a stopper ( 100 ) located within a fixed radius from the APC driving shaft ( 30 ) and fixed on the APC arm ( 40 ); and a pair of stop bolts ( 110 A, 110 B) fixed on the APC body ( 20 ) to stop the rotation of the APC arm ( 40 ) by contacting with the stopper ( 100 ) whenever the APC arm ( 40 ) is rotated at an angle of 180°.
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