| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing frame for a cover of underground structure which contributes to easy asphalt rolling work or the like at the time of placing pavement, and has a high physical strength. SOLUTION: The bearing frame for the cover of the underground structure includes a cylinder section for bearing a cover body and a flange radially extending from the periphery of the cylinder section. The flange has a plurality of bumps which are circumferentially formed at intervals, and each bump extends over the entire radial width of the flange. Thus when the bearing frame is set in a road or the like, reinforcing ribs do not protrude from the periphery of the cylinder portion, and therefore the asphalt rolling work or the like can be easily carried out to a sufficient degree. Further since the bumps are formed on the flange of the bearing frame, circumferentially at intervals so that each bump extends over the entire radial width of the flange, the flexural rigidity of the bearing frame is improved, and the flange of the bearing frame is made thinner than ever, which leads to reduction in weight of the bearing frame. COPYRIGHT: (C)2005,JPO&NCIPI
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