| 摘要 |
PROBLEM TO BE SOLVED: To positively fix a nozzle, and to feed a filler at high pressure to a location that is shallow from a wall surface. SOLUTION: The nozzle is formed of an internal pipe 20, an external pipe 22, an elastic ring 26, a stopper member 27, a nut 28, and a sealing body 30. The internal pipe 20 is inserted into a hole drilled in a concrete crack and has its tip blocked so that the filler is fed. The external pipe 22 is slidably fitted on the internal pipe 20 in a manner being movable in its axial direction. The elastic ring 26 is externally fitted on the tip of the internal pipe 20, and axially pressed and outward swelled, to thereby make elastic contact with the hole. The stopper member 27 retains the elastic ring 26. The nut 28 is screwed onto a male screw 29 formed on the internal pipe, which moves the external pipe 22, to thereby press the elastic ring 26. The sealing body 30 is inserted into a gap between a base-side end of the external pipe 22 and the nut 28, to seal a gap between the internal pipe 20 and the hole. According to the nozzle thus formed, the internal pipe 20 has an internal discharge port 23 formed in a wall thereof, for discharging the filler, and the external pipe 22 has an external discharge port 25 formed in a wall thereof, for discharging the filler discharged from the internal discharge port 23 of the internal pipe 20.
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