Cutting device and cutting method of cord-embedded rubber sheet member

A cutting device of a cord-embedded rubber sheet member, the cutting device comprising:

• a conveying mechanism in which a cord-embedded rubber sheet member is placed, the cord-embedded rubber sheet member comprising a number of cords embedded side by side in unvulcanized rubber;
• a blade receiving portion disposed in one surface side in a thickness direction of the rubber sheet member and crossing the rubber sheet member;
• and
• a cutting blade disposed in an other surface side in the thickness direction of the rubber sheet member and held by a holder rotating about an axial center extending in the thickness direction of the rubber sheet member whereby a cutting-edge advancement direction turns about the axial center,
• in a state in which the rubber sheet member is sandwiched in the thickness direction by the cutting blade and the blade receiving portion, the cutting blade moving toward an extension direction of the cords whereby the rubber sheet member is cut between the cords, and
• the cutting device comprising a turning restoring mechanism including a magnet that constantly applies a magnetic force, to the holder before cutting the rubber sheet member, as a turning restoring force that restores the cutting-edge advancement direction to a preset moving direction.