| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a caster which is easily and promptly manufactured with a smaller number of component items. <P>SOLUTION: The caster includes: a pedestal member 1 which is attached to a member D to be attached; a supporting yoke 2 in which wheels 3 are pivotally attached at a lower end 2b so as to be freely rotated around a horizontal axis core; a plurality of first spheres 6 are set between a pedestal circular recessed groove 10 formed on the lower surface of the pedestal member 1 and an upper surface circular recessed groove 21 formed on the upper surface of a top plate section 20 of the supporting yoke 2; and a receiving member 8 which supports, from the under side, a plurality of second spheres 7 which are in contact with and roll in a lower surface circular recessed groove 22 formed at the lower surface of the top plate section 20. A shaft member 5, which has an outer guard section 51 on one end 5a side and in which a hole with a bottom is formed on the other end 5b side, is inserted through the pedestal member 1 and the receiving member 8 in a vertical axis core L1 direction, and a pull-out stop guard section 53 is formed by pushing out the other end side of the shaft member 5 to a radial outer side by plastic working. The outer guard section 51 is densely brought into contact with the pedestal member 1, and the pull-out stop guard section 53 is densely brought into contact with the receiving member 8. Thereby, the pedestal member 1 and the supporting yoke 2 are mutually and pivotally attached so as to be freely rotated around the vertical axis core L1. <P>COPYRIGHT: (C)2012,JPO&INPIT |
