| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a joint connection mechanism for assuring sufficient fastening strength, without rotating a fluorocarbon resin pipe and a joint in the direction of untightening a screw. SOLUTION: Female screw portions 2, 3 are formed inside both ends of the fluorocarbon resin pipe 1 and a flanged locking protrusion 4, extending inward to the pipe is provided on the end side (the edge) of the female screw portion 2. Male screw portions 6, 7 to be fitted to the female screw portions 2, 3, respectively, of the fluorocarbon pipe 1 are formed on the outer peripheries at both ends of a separate short-cylindrical pipe joint 5 and a taper 8 and a large-diameter portion 9 are provided to be continuous on the outer periphery to the center side of the male screw portion 6. The large-diameter portion 9 has an outer periphery groove 10 for fitting the locking protrusion 4, to form the connection mechanism for the fluorocarbon resin pipe joint to be connected thereto.</p> |
