| 摘要 |
PROBLEM TO BE SOLVED: To obtain a dustproof structure which is high versatile and easily installed without spoiling the design of appearance. SOLUTION: In a caster 10, wheels 13, 14 are rotatably supported in a caster body 12 via an axle shaft 15. A dustproof cover 30 is fastened to the caster body 12 side. The dustproof cover 30 extends along and covers boss 13D, 14D peripheries, inside recessed portions 13C, 14C, and outer peripheral annular portions 13E, 14E internal peripheral surfaces of the wheels 13, 14 so as to form a narrow clearance S1. A wheel-shaped member 40 is fastened to inside flat surfaces 13G, 14G of wheel outer peripheral annular portions 13E, 14E. An outer peripheral edge 41 of the wheel-shaped member 40 is formed to be smaller in diameter than the outer diameter of the wheel outer peripheral annular portions 13E, 14E, the inner edge 42 faces an outer peripheral side edge 35 of the dustproof cover 30, and the narrow clearance S2 is formed between the outer peripheral side edge 35, which provides the dustproof structure. COPYRIGHT: (C)2008,JPO&INPIT
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