| 摘要 |
PURPOSE:To provide a heating device for manufacturing effectively at a low cost, a branch pipe coupler having high joining strength between a main pipe and a branch pipe, and requiring no auxiliary coupler such as a reducer. CONSTITUTION:In a heating device used for manufacturing a branch pipe coupler in which a branch pipe having a diameter smaller than that of a main pipe is joined with the pipe wall of the main pipe at right angles in relation to the axial core of the main pipe, a recessed heating part 3 having a recessed part 31 capable of receiving insertion of the inclining joining end part of a branch pipe which is formed joinably at right angles to the pipe wall of the main pipe, and also the opening rim 311 of the recessed part 31 is formed in a shape nearly matching with the inclining joining end part of the branch pipe, and a projection shaped heating part 4 provided with a projection part 41 having its outer diameter smaller than that of the branch pipe, are provided on a main body part 2 in which a heater 1 is housed. |
