| 摘要 |
PROBLEM TO BE SOLVED: To surely fix a nozzle, and to inject fillers at high pressure. SOLUTION: The nozzle for a repair device for a concrete crack has an inner pipe 20, to which fillers are fed, an outer pipe 22 movably fitted to the inner pipe 20, a first elastic ring 26 externally fitted to the inner pipe 20 on the front side from the front end of the outer pipe 22, bulged and being capable of being elastically contacted with holes, a second elastic ring 27 externally fitted to the inner pipe 20 on the base end side from the base end of the outer pipe 22, bulged and being capable of being elastically contacted with holes, a stopper member 21 holding down the first elastic ring 26 and a nut 30 moving the second elastic ring 27 and the outer pipe 22 to the stopper member 21 side by a screwing to a male screw 29 formed to the inner pipe 20 on the base end side from the second elastic ring 27 and bulging the second elastic ring 27 and the first elastic ring 26. The fillers are discharged from external discharge openings 25 for the outer pipe 22 through internal discharge openings 23 for the inner pipe 20 under the state in which the first and second elastic rings 26 and 27 are contacted elastically. COPYRIGHT: (C)2004,JPO
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