Abstract: A floor panel apparatus comprises: beams arranged inside an aircraft main body; floor panels arranged on the beams; and ball transfer unit bolts each including a ball transfer unit in which a rotatable ball is disposed and a bolt portion which is integral with the ball transfer unit, the ball transfer unit bolts configured such that the floor panels and the beams are detachably fastened together by the bolt portions with the balls protruding on the floor panel side.

Abstract: A penetrated floating nut includes: a first retaining member including a cylindrical first cylindrical section and a first flange section provided at one end portion of the first cylindrical section; a second retaining member including a cylindrical second cylindrical section and a second flange section provided at one end portion of the second cylindrical section, the second cylindrical section being joined to the first cylindrical section of the first retaining member; and a nut housed in the first cylindrical section of the first retaining member with a gap therebetween and including a third flange section at one end portion of the nut and further including rotation stopping means between the nut and the first cylindrical section of the first retaining member, the third flange section being housed in the second cylindrical section of the second retaining member with a gap therebetween and being capable of contacting an end surface of the first cylindrical section of the first retaining member.

Abstract: A penetrated floating nut includes: a first retaining member including a cylindrical first cylindrical section and a first flange section provided at one end portion of the first cylindrical section; a second retaining member including a cylindrical second cylindrical section and a second flange section provided at one end portion of the second cylindrical section, the second cylindrical section being joined to the first cylindrical section of the first retaining member; and a nut housed in the first cylindrical section of the first retaining member with a gap therebetween and including a third flange section at one end portion of the nut and further including rotation stopping means between the nut and the first cylindrical section of the first retaining member, the third flange section being housed in the second cylindrical section of the second retaining member with a gap therebetween and being capable of contacting an end surface of the first cylindrical section of the first retaining member.

Abstract: A floor panel apparatus comprises: beams arranged inside an aircraft main body; floor panels arranged on the beams; and ball transfer unit bolts each including a ball transfer unit in which a rotatable ball is disposed and a bolt portion which is integral with the ball transfer unit, the ball transfer unit bolts configured such that the floor panels and the beams are detachably fastened together by the bolt portions with the balls protruding on the floor panel side.