Side sealing device, twin-roll continuous casting apparatus, and method of manufacturing cast strip

A side sealing device for a twin-roll continuous casting apparatus that supplies molten metal to a molten metal pool portion formed by a pair of rotating mold rolls and a pair of side weirs through an immersion nozzle and causes solidified shells to be formed and to grow on peripheral surfaces of the mold rolls to manufacture a cast strip, the side sealing device sealing end surface sides of the mold rolls by each side weir, the side sealing device comprising:

• a side weir pressing unit, including a hydraulic cylinder, that presses the side weir against end surfaces of the mold rolls;
• and
• a side weir lifter that pulls the side weir at least upward in a vertical direction and suppresses a downward displacement of the side weir caused by a rotation of the mold rolls in a case where the mold rolls is rotating,
• wherein the side weir lifter is configured to pull the side weir at least upward in the vertical direction by a biasing force of a biasing member, including a spring.