| 摘要 |
PURPOSE: A bobsleigh is provided, which can be used in anywhere with rollers, is run through safe cylinder sliding, so makes people feel exited and thrilled, and makes possible to play with in any season. CONSTITUTION: A roller is prepared by inserting ball bearings into the top of the inside of an upper cap, inserting a ball with ball bearings to the top of a mid-cap, setting the mid-cap in the upper cap, and fixing fitting a lower bearing on the top of a lower cap in the mid-cap. The rollers(50) can be installed to the outer around(50a,50c) of supports (10,10a) and a supporting frame(15) of a bobsleigh which is made of loading frame(52) with supporting frames and supports, a mattress for buffer(11) on the flat, a seat belt inside of a middle supporting frame(16), and common wheels of the outer around of the supports(10,10a) and a supporting frame(17) where a head of a rider goes to.
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