| 摘要 |
<p>PURPOSE:To connect a pipe without carrying out marking work by tentatively fitting a core member engagement part with the inner peripheral edge of a coupling edge part by a large holding force by the force for fitting a core member to a transparent or semitransparent resin pipe and coloring the core member to a color permitting the discrimination from the resin pipe. CONSTITUTION:In the state where a core member 4 is fitted in a resin pipe 2, the engagement part 41 of the core member 41 is projected from the outer peripheral edge at the edge part of the resin pipe 2, and engaged with a stopper 32 when fitted with a coupling body 3. In this state, the length L of the core member 4 is shortened in comparison with the distance D from the edge part of the coupling body 3 to the stopper 32, so that the core member 4 is accommodated into the coupling body 3. Further, the core member 4 is colored to the color permitting the discrimination from the force transparent or semitransparent color resin pipe 2. The holding force of the core member 4 and the coupling body 3 is made larger than the fitting force to the resin pipe 2 of the core member 4, and the tentative fitting is prevented from being released. Since the fitted state can be grasped by the core member 4 which can be seen through the resin pipe 2, the resin pipe 2 can be connected without carrying out the marking work.</p> |
