Cutting device

A cutting device for cutting a ply for a tire in which parallel cords arranged at fixed pitches are coated with an unvulcanized topping rubber, comprising:

• a pitch increasing device for increasing the pitches of the cords by pressing the ply from a second surface side to a first surface side of the ply so as to stretch the ply toward the first surface side, and
• a ply cutting tool disposed on the first surface side of the ply, and comprising a cutter blade for cutting the stretched portion of the ply along the cords,
• wherein
• the pitch increasing device comprises:
• a pair of holding tools for holding the ply at positions separated from each other in a direction orthogonal to the longitudinal direction of the cords, and
• a pressing tool for projecting a portion of the ply between said positions, toward the first surface side so as to increase the pitches of the cords in said portion,
• wherein
• the pressing tool has
• an upper surface for contacting with the second surface of the ply where the pitches of the cords are increased, and
• a pair of side surfaces extending downward from both edges in the cord arrangement direction of the upper surface,
• the upper surface is provided with a cutout part recessed downward at an intermediate position in the cords arrangement direction of the upper surface, and
• the cutter blade is movable from the first surface side to the second surface side to engage with the cutout part, whereby, the portion of the ply where the pitches of the cords are increased is cut while the second surface thereof is supported by the upper surface of the pressing tool.