An automatic cutting device for forming a curl shaped type sandwich, said automatic cutting device comprising:
- a body frame having left and right flat surfaces and a chassis installed therebetween, said chassis being supported on a plurality of fixing stands;
- a lift means installed on a bottom of said chassis, said lift means including a guiding screw, a nut threadedly engaging said guiding screw, and a lift driving motor arranged to indirectly drive said nut so as to raise and lower said chassis via said guiding screw;
- a cutting means installed between said right and left flat surfaces, said cutting means including a cutting driving motor disposed on one of said flat surfaces, said cutting driving motor having a rotary axle, a rotary wheel having an eccentric shaft disposed thereon, said wheel being pivotally fixed on said rotary axle of said cutting driving motor, a plurality of bearing bases fixedly mounted on said flat surfaces, left and right drag rods extending through said bearing bases on said left and right flat surfaces, respectively, at least one of said drag rods having at least one axial steel slot, a universal connector connected to a distal end of one of said drag rods located between said wheel and a respective bearing base, said universal connector being pivotally connected to said eccentric shaft of said wheel, a jig saw blade fixedly clamped between said drag rods, a stop block provided at a distal end of the other one of said drag rods, a revert spring biasing said stop block in a direction away from said jig saw blade, and a sleeve securely covering said revert spring to prevent fingers of a user from being clamped;
- a feeding means pivotally fixed on said chassis by at least one little gear and at least one guide rod, said feeding means including a feed driving motor arranged to rotate said at least one guide rod and said at least one little gear, and a bread box having a large gear installed on a periphery thereof, said large gear being fixedly engaged with said at lease one small gear to be rotated thereby, said jig saw blade extending through said bread box;
- and
- a rotation means installed on one side of said cutting means for reversibly moving said jig saw blade 180 degrees, said rotation means including a chain rod extending across said left and right flat surfaces, at least one chain wheel disposed on said chain rod, said at least one of said drag rods of said cutting means also having a chain wheel disposed thereon, said chain wheel of said at least one of said drag rods having an inner part filled with steel balls that engage with said at least one axial steel slot, said chain wheel of said at least one of said drag rods being arranged to rotate with rotation of said at least one chain wheel of said chain rod, and a rotation driving motor for rotating said at least one said chain wheel of said chain rod such that rotation timing and rotation angle of said jig saw blade is controlled thereby;
- wherein said lift means, said cutting means and said feeding means act simultaneously, and said jig saw blade is properly controlled by said rotation means to cut bread material within said bread box and form a curl sandwich material.