Abrasive machine

An abrasive machine,

• comprising:
• a lower plate for holding a work piece;
• an upper plate for pressing the work piece on said lower plate, said upper plate being relatively moved with respect to said lower plate so as to abrade the work piece;
• and
• a plate supporting mechanism supporting said upper polishing plate, said plate supporting mechanism being capable of adjusting a pressing force of said upper polishing plate,
• wherein said plate supporting mechanism comprises:
• a base frame;
• a cylinder unit being provided to an upper part of said base frame, a piston rod of said cylinder unit being capable of extending and retracting in the vertical direction;
• a rotary plate being rotatably attached to a lower end of the piston rod of said cylinder unit;
• a plurality of connecting rods being vertically and movably pierced through said rotary plate, lower ends of said connecting rods being connected to said upper plate so as to rotate said upper plate together with said rotary plate, upper ends of said connecting rods respectively having stopper sections, which prevents said connecting rods from falling off from said rotary plate;
• and
• a plurality of elastic members being respectively provided between the stopper sections of said connecting rods and said rotary plate,
• whereby the pressing force of said upper plate is adjusted by adjusting a lifting force of said cylinder unit, which suspends said upper plate.