| 摘要 |
PROBLEM TO BE SOLVED: To provide a tip holder capable of holding a wheel tip without becoming unsteadily.SOLUTION: A tip holder unit is composed of a wheel tip 2 and a tip holder 4A for holding the wheel tip 2 by a wheel shaft 3 inserted into a shaft insertion hole 1, and a holder body 4 of the tip holder 4A comprises left-right support parts 6 and 7 having a surface opposed by sandwiching a groove 5, and the wheel shaft 3 is installed in the support parts 6 and 7 via installation holes 8 and 9, and the wheel shaft 3 is formed of a thin diameter part 3a, a tapered part 3b and a large diameter part 3c, and a peripheral surface of the thin diameter part 3a is fitted to the shaft insertion hole 1 so as to be capable of sliding contact, and a guide surface 1a is provided in an edge part of the shaft insertion hole 3 opening on one side surface of the wheel tip 2, and the tapered part 3b of the wheel shaft 3 contacts with the guide surface 1a, and the wheel tip 2 is rotatably supported by the wheel shaft 3 in a state where a side surface 2a on the opposite side of the guide surface 1a of the wheel tip 2 contacts with a surface 6a of one support member 6. |
