| 摘要 |
PROBLEM TO BE SOLVED: To suggest a temporary structure of rock fall prevention net in an oven, capable of improving safety of workers in an oven by preventing falling of brick or the like releasing from a side wall of the oven. SOLUTION: The method for temporarily providing the rock prevention net is characterized by fixing an upper end opening 12 in a rock fall prevention net 11 constituted in cylindrical state so that openings 12 and 13 are formed at upper and lower ends in an oven 2 in which a diameter-expanding side wall 46 in which the diameter is gradually expanded from an oven port 42 to the lower direction and a vertical side wall 48 installed in nearly vertical direction from the lower end 47 of the diameter-expanding side wall 46 toward an oven bottom 43 are at least formed, over at least 3 places in an oven port 42 formed in the center of oven top in the oven 2, and injecting air in arbitrary height in the vertical side wall 48 into a first air duct 31 provided in a ring-like state along the opening 13 of the lower end of the rock fall prevention net 11, and expanding the diameter of the first air duct 31 to the outside and making the outer periphery in the opening 13 of the lower end of the rock fall prevention net 11 adhere tightly to the vertical side wall 48 thereby. COPYRIGHT: (C)2008,JPO&INPIT
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