Radial foil bearing

A radial foil bearing that, by being fitted on a rotating shaft, supports the rotating shaft, comprising:

• a cylindrical top foil that is arranged facing the rotating shaft;
• a back foil that is arranged on the outer side of the top foil in the radial direction;
• and a cylindrical bearing housing that houses the top foil and the back foil in the state of being inserted therein,
• wherein a through-slot that is continuous from one end to the other end along the axial direction is formed in the inner circumferential surface of the bearing housing;
• a fixing tool that forms a plurality of engagement slots by dividing the through-slot in the lengthwise direction is fitted in the through-slot;
• a regulating portion that regulates the movement of the fixing tool in the lengthwise direction of the through-slot is provided in the through-slot and the fixing tool;
• the top foil is formed by a metal foil that is rectangular and has a first uneven portion consisting of a convex portion and a concave portion on one side, and has a second uneven portion that forms a concave portion at a position corresponding to the convex portion of the first uneven portion and forms a convex portion at at least a portion of the position corresponding to the concave portion of the first uneven portion on the other side that is opposite the one side being wound into a cylindrical shape so that the first uneven portion and the second uneven portion overlap, and each convex portion in the first uneven portion and the second uneven portion passes through each respectively corresponding concave portion in the first uneven portion and the second uneven portion to be drawn out to the bearing housing side;
• and
• the convex portions that have been drawn out to the bearing housing side engage with the respectively corresponding engagement slots.