To provide the most suitable connection structure for a rolling bearing retainer for high-speed rotation comprising a pair of resin members without backlash neither in the axial direction nor in the circumferential direction and capable of securing sufficient axial connection strength.
Between the pair of resin members 11, 12, after inserting a pillar part 21 projected on a connection surface 11a of one resin member 11 into a connection hole part 23 formed on a connection surface 12a of the other resin member 12, a head part 21a of the pillar part 21 projected to the outside of the connection hole part 23 is ultrasonically-welded and caulked, which connects the pair of the resin members 11, 12 to each other. Asperity 25 for being welded by ultrasonically-welding and caulking to the head part 21a is provided on side faces of the pillar part 21 and the connection hole part 23.
Hironori Honda
Toshimitsu Ichikawa