INTERNAL FITTING-JOINT FOR SPIRAL PIPE

• Main Author: SAKANE YASUSHI
• Format: Patent
• Language: English
• Published: 02.11.2006
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a spiral pipe joint capable of surely connecting a spiral pipe and a spiral pipe without forming a projecting portion to the outer peripheral direction on a connecting portion, and preventing separation after connection. SOLUTION: A short cylindrical pipe body H inserted inside of both pipe ends to connect them when the spiral pipes respectively manufactured by spirally winding a strip material are continuously connected with each other, comprises a reinforcement core material 1 made of a hard synthetic resin spirally wound at a prescribed interval, a thin film-shaped wall body 2 adhered to the reinforcement core materials 1, 1 adjacent to each other at both side edge portions in the width direction and hung over between the reinforcement core materials, and reverse rotation preventing members 3, 3 made of hard synthetic resin in a state of being positioned at an outer side with respect to an outer peripheral diameter c3 of the reinforcement core material 1 between the reinforcement core materials 1, 1 respectively adhered on an outer surface of the wall body 2 at one end 31 side and adjacent to each other at an terminal end portion 32 or an intermediate portion 33 of the other end side, one end 31 sides of the reverse rotation preventing members 3, 3 are positioned at both end sides of the pipe body H with attitudes along the spiral directions opposite to each other. COPYRIGHT: (C)2007,JPO&INPIT