| 摘要 |
The present invention relates to a device for fixing a reinforcement frame in a cover seating unit of a synthetic resin manhole. An objective of the present invention is to reinforce a cover seating unit of a manhole with a reinforcement frame of a metallic material to prevent deformation, wear, and damage. According to the present invention, a protrusion protruding from an outer wall surface of the reinforcement frame made of the metallic material is pressed into the cover seating unit of the manhole manufactured with a synthetic resin material. The present invention uses the synthetic resin material to manufacture the manhole by injection and compression molding. When removing the manhole from the mold, a material property is used while the manhole is not completely cooled to reinforce the cover seating unit by pressing and mounting the reinforcement frame in the cover seating unit to prevent deformation of and damage to the cover seating unit while in use once the manhole is installed. Therefore, the manhole can be used for a long period of time. |
