| 摘要 |
PROBLEM TO BE SOLVED: To provide a sash roller capable of extending the life by improving the wear resistance and the impact absorbing performance in rolling. SOLUTION: The sash roller body 17 comprises a ring body 18 set in a support shaft 23 rotatably from outside via a bearing 20 and an outer cylindrical body 19 set in the ring body 18 from outside. The ring body 18 is made of a soft material, and the outer cylindrical body 19 is made of a hard material harder than the ring body 18. COPYRIGHT: (C)2003,JPO
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