| abstract |
(57) [Summary] [Purpose] All the steps for welding can be performed smoothly and continuously, and almost no troublesome skill is required. [Structure] A pair of clamp parts for holding a pair of heat-weldable resin tubular parts (hereinafter referred to as tubular parts) and a pair of clamp parts for holding the tubular parts, An abutting part for abutting the end faces of the pair of tubular parts, and a cutting part for cutting the end faces of the tubular parts clamped by the pair of clamp parts into a flat surface in a direction perpendicular to the axis of the tubular part. And a melting portion for melting the cut flat surface to a substantially equal melting depth, and the cutting portion, the abutting portion and the melting portion are arranged on the rotating disk at a predetermined interval in the rotation direction, One of the melted tubular parts was brought relatively close to the other tubular part so as to be welded to each other. |