| 摘要 |
PROBLEM TO BE SOLVED: To provide a manhole falling curing frame capable of securing safety of a worker when lifting a step, without making a curing frame fall in use, while easily assembling the curing frame. SOLUTION: A pair of right-left side frames 7 and 8 composed of a pair of front-rear wall girder materials 1 and 2, a pair of front-rear vertical materials 3 and 4 and horizontal materials 5 and 6 connecting both vertical materials 3 and 4, are installed so that an attitude can be changed to an upright attitude and a folding-up attitude of folding up the mutual vertical materials 3 and 4 in layers on the wall girder materials 1 and 2, and an expansion girth 9 is extended between the laterally opposed front vertical materials 3 sand 3 and between the rear vertical materials 4 and 4 of both side frames 7 and 8. Its one end part is pivoted on the opposed one vertical material 3 or 4, and the other end part is removably installed on the other vertical material 3 or 4. A sleeper material 10 is removably horizontally installed between upper end parts of both side frames 7 and 8, and an installation member 11 is slidably installed in the longitudinal direction of the sleeper material on the sleeper material 10, and a safety block SB is installed on the installation member 11. COPYRIGHT: (C)2009,JPO&INPIT
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