| 摘要 |
PROBLEM TO BE SOLVED: To provide a manhole-opening curing barricade, which is not moved easily even when a pedestrian and an operator collide by mistake and even when a strong wind blows and improves daylighting properties in a manhole while enhancing the usability of a ventilating duct. SOLUTION: A body section 10 is formed by positioning support members 11, upper side sash bars 12, lower side sash bars 13 and reinforcing sash bars 14 composed of a bar stock at the side of a quadrangular pyramidal base in which an upper section is spread. A supporting section 20 supporting a frame section 21 to the lower side sash bars 13 through erecting sections 22a, projecting sections 22b and supporting column sections 22c is formed. The outside diameter of the supporting section 20 is formed in a size in which the supporting section 20 can be inserted into the manhole 2. Accordingly, the body section 10 is brought to the state, in which the body section is installed around the manhole, when the supporting section 20 is inserted into the manhole, and an attention of the pedestrian can be called. COPYRIGHT: (C)2005,JPO&NCIPI
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