To easily and certainly fix a resin tube in a tube faucet without using clamps, by forming holes opening toward the outer circumference face at a plurality of points on the circumference of a cold zone which is placed on the end side of the heat zone in the faucet in which a heater is buried, and installing a grease nipple in this hole.
The inner circumference face of a tube faucet 12 and the outer circumference face of an inserted resin tube 20 are melted by resistant heating of an electric heating wire 13 buried spirally in the inner circumference of the tube faucet 12 which is installed on a coupling 11 made of thermoplastic resin, and a resin tube 20 and a welded coupling are welded integratedly. In this time, on a cold zone 14 in the end side of the heat zone in which the electric heating wire 13 is buried, holes 15 opening toward the outer circumference face are drilled at two points on the circumference of the coupling 11, and grease nipples 16a, 16b are spirally stuck in the screws of the holes 15. A thin part 15a formed on the bottom of the hole 15 is transformed by the pressure of high viscous fluid which is poured from grease nipples 16a, 16b, and the clamp is fixed by contacting this thin part 15a with the resin tube 20.
ARAKI SATORU
KAWAI HIDEKI
KANISAWA YUTAKA
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