| 摘要 |
PURPOSE:To make adding operations of a standard-sized underground pipe unnecessary by performing molding while continuing a long-sized underground pipe materials in order in a shaft on the spot by constituting the title device of a bend processing device of a long-sized beltlike underground pipe material, a fusing device of a side end part of a bent underground pipe material and a curing device. CONSTITUTION:A long-sized beltlike underground pipe material 1 comprised of a coil-shaped plasticizing material is arranged on the upper part of a shaft 21. An end of the coil-shaped underground pipe material 1 passes through a changing roller 6-1 changing a direction in a thrusting direction. The underground pipe material 1 is sent in order into a plurality of hand-drum-shaped rollers 6-2 to 6-10 having a bent surface recessed in an arc-shaped state by curvature coincident with the diameter of the underground pipe 2, pressurized and molded into a cylindrical state and the same is bent. When bending is completed, a fusing rib 18 is molded on the lower end part by a rib finishing roller 3 fitted to the lower part. Then joining of the rib 18 and fusing of a rib part 12 are performed in order by a fusing device 4. A fused part is cooled and cured by a curing device 5 so that a molded endless underground pipe 2 can display mechanical strength and durability as the underground pipe according to a building state. |
