| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a structure for surely and easily managing a history of this wheel supporting bearing unit 5a, by increasing traceability of the wheel supporting bearing unit 5a. <P>SOLUTION: An IC tag 23 is fixed a central portion of an axially outer end surface of a hub 10a being a rotary wheel constituting the wheel supporting bearing unit 5a. Historical information on the wheel supporting bearing unit 5a is stored in this IC tag 23. The historical information stored in this IC tag 23 can be read easily by the use of an external device 28. Due to this, traceability of the wheel supporting bearing unit 5a can be increased. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
