Magnetic screw conveying apparatus

A magnetic screw conveying apparatus comprising:

• a rotary shaft rotatable supported;
• driving means for driving said rotary shaft to rotate;
• a male magnetic screw having magnetized bands with a south pole S and a north pole N alternately magnetized and in parallel to each other on the outer periphery of said rotary shaft;
• a first slide table slidably mounted on said rotary shaft;
• a first female magnetic screw having magnetized bands with a south pole S and a north pole N alternately magnetized in a spiral form at a first inclination angle on an inner periphery surface of said first slide table, opposite to said male magnetic screw;
• a second slide table slidably mounted on said rotary shaft;
• a second female magnetic screw having magnetized bands with a south pole S and a north pole N alternately magnetized in a spiral form at a second inclination angle on an inner periphery surface of said second slide table, opposite to said male magnetic screw;
• and
• a pair of chuck claws one of which is fixed on said first slide table and the other is fixed on said second slide table;
• wherein said first and second inclination angles are inclined in different directions, and with the rotation of said rotary shaft by said driving means, said first and second female magnetic screws receive magnetic force from said male magnetic screw respectively, and thus said first and second slide tables move in opposite directions when the rotary shaft is rotated.

A magnetic screw chuck apparatus comprising:

• a rotary shaft rotatably supported;
• driving means for driving said rotary shaft to rotate;
• a male magnetic screw having magnetized bands with a south pole S and a north pole N alternately magnetized and in parallel to each other on the outer periphery of said rotary shaft;
• a first movable carriage slidably mounted on said rotary shaft;
• a first female magnetic screw having magnetized bands with a south pole S and a north pole N alternately magnetized in a spiral form at a first inclination angle on an inner periphery surface of said first movable carriage, opposite to said male magnetic screw;
• a second movable carriage slidably mounted on said rotary shaft;
• a second female magnetic screw having magnetized bands with a south pole S and a north pole N alternately magnetized in a spiral form at a second inclination angle on an inner periphery surface of said second movable carriage, opposite to said male magnetic screw;
• and
• a pair of chuck claws one of which is fixed on said first movable carriage and another is fixed on said second movable carriage,
• wherein, with the rotation of said rotary shaft by said driving means, said first and second female magnetic screws receive magnetic force from said male magnetic screw respectively, thereby allowing said first and second movable carriages to move at different speeds, and said first and second inclination angles are set in different directions with respect to a circumference, and thus said first and second movable carriages move in opposite directions when the rotary shaft is rotated.