| 摘要 |
PROBLEM TO BE SOLVED: To provide a sash roller having a wheel member structured to hardly come off a traditional sill groove of shallow depth. SOLUTION: The projection shape of a wheel surface 3a of a running wheel 3 is formed in approximately conical surface shape of approximately isosceles right triangle shape, that is, a vertex part of the wheel surface 3a of the running wheel 3 is a pointed end 3b whose projection shape is approximately right-angled pointed shape, and is adapted to a right-angled part defined by a wall surface and a bottom face of the sill groove 51a (refer to Figs.1 and 2). Consequently, when the running wheel 3 rolls within the sill groove 51a, the pointed end 3b of the wheel surface 3a is easily caught by the level difference of the sill groove 51a. COPYRIGHT: (C)2009,JPO&INPIT
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