Rope wheel, traction wheel, elevator drive machinery and elevator

A rope wheel for an elevator, the rope wheel comprising:

• a circular rim surface;
• and
• a plurality of circular guide flanges that are side by side in an axial direction extending along a central axis of the rope wheel, the plurality of circular guide flanges including adjacent circular guide flanges that are on opposite axial sides of the circular rim surface,
• wherein the circular rim surface is configured to enable a belt to pass against and around the circular rim surface, and the plurality of circular guide flanges are configured to guide the belt passing against and around the circular rim surface, and
• wherein each separate circular guide flange of the adjacent circular guide flanges includes a circular array of movable guide parts, each movable guide part of each circular array of movable guide parts including a guide surface portion configured to guide the belt passing against and around the circular rim surface, the guide surface portion configured to move towards the central axis in relation to both the circular rim surface and at least a portion of the separate circular guide flange.