Crystal ingot lifting load measuring device

A device for measuring the lifting up load of a crystal rod grown by the Czochralski method, comprising:

• a wire rope consisting of multiple strands, said wire rope having one end connected to said crystal rod through a seed crystal holder to lift up said crystal rod;
• a motor;
• a drum driven by said motor, having a helical groove formed in the peripheral surface of said drum for winding and guiding said wire rope, the remaining end of said wire rope connected to said drum;
• a first base;
• a load cell mounted to said first base;
• a second base supported by said first base through said load cell;
• and
• a pulley rotatably supported by said second base, said pulley having a guide groove formed in a peripheral surface thereof for guiding said wire rope between said drum and said crystal holder, a part of the cross-sectional shape of said guide groove being substantially identical to a semicircle circumscribing said wire rope.