| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the malfunction of a holder joint by not entering cullets into a bearing. <P>SOLUTION: A pair of bearings 12, 13 holding a kingpin 11 to be freely rotatable are set. A bearing cover 16 being in contact with the inner ring of the bearing 13 and a kingpin presser 15 holding the outer ring part of the bearing 13 are prepared at the lower part of the lower bearing 13. A circular projection 16c is formed at the upper outer periphery of a flange 16b which is the lower end of the bearing cover 16. A circular groove 15c is grooved at the lower end of the kingpin presser 15 for a labyrinth structure. The entering of foreign materials such as the cullets and the like into the bearing 13 when scribing is prevented by the labyrinth structure. <P>COPYRIGHT: (C)2012,JPO&INPIT |
