Lateral pipe lining method and lateral pipe lining apparatus

A lateral pipe lining apparatus in which a flange formed on one end of a lateral pipe lining material composed of a flexible tubular resin-absorbing material impregnated with a curable resin is brought into close contact with the periphery of a lateral pipe opening of a main pipe, and eversion pressure is applied to the lateral pipe lining material to evert and insert the lateral pipe lining material into a lateral pipe to line the inner circumferential wall thereof, the apparatus comprising:

• A head collar having a curved section and a cylindrical section projecting from the curved section so that the outside diameter thereof is less than the inside diameter of the flange of the lateral pipe lining material;
• an expanding member mounted to the outer circumferential surface of the cylindrical section of the head collar, the expanding member being capable of expanding by feeding a pressurized fluid thereto, the lateral pipe lining material being installed on the head collar so that the cylindrical section of the head collar to which the expanding member is mounted is located within the flange of the lateral pipe lining material;
• a pressure bag to which the head color is hermetically mounted and which stores a non-everted portion of the lateral pipe lining material;
• and
• a work robot for guiding the pressure bag so that the flange of the lateral pipe lining material is brought into close contact with the periphery of the lateral pipe opening of the main pipe,
• wherein the expanding member is caused to expand so that the outer circumferential surface of the expanding member comes into close contact with the inner circumferential surface near the flange, and the inner circumferential surface of the expanding member comes into close contact with the outer circumferential surface of the cylindrical section of the head collar, and
• the lateral pipe lining material within the pressure bag is everted and inserted into the lateral pipe with the expanding member expanded to line the lateral pipe with the lateral pipe lining material.