10-01-2019 дата публикации
Номер: US20190010674A1
Принадлежит:
In the present invention, when a circular lid body is opened or closed by a hinge-coupling structure at an eccentric location out of a circle, the circular lid body can be opened or closed without interference between an edge protrusion part of the circular lid body and a circular edge support frame of a support frame body. Therefore, the present invention is useful in that the present invention has overcome innumerable interferences on arcs through a curve insertion scheme of a circular structure, that is, a curve insertion scheme by a rotational inclination angle θ of the edge protrusion part and an operation model view of an S-shaped hinge curve part. 1. A system for manufacturing a polymer circular manhole assembly in which a circular edge protrusion part of a lid body and a circular edge support frame of a support frame body are insertable without mutual interference , ejection of the lid body due to backflow is prevented , comprising:a circular lid body having an edge protrusion part with a height h (=50 mm) and a support frame body having an edge support frame with a height h (=50 mm) are opened or closed, and{'b': 4', '3', '1', '2', '1', '2', '3', '4', '1', '1', '2', '1', '1', '2', '1', '1', '2, 'a hinge portion is formed integrally with a lid body while being located out of a circle of the lid body and a hinge frame corresponding to the hinge portion is formed integrally with the hinge frame while being located out of the circle of the support frame body constituted by a hinge frame, a bottom plate, and a rear surface frame, in this case, an S-shaped hinge curve part is formed on a side part of the hinge portion, a hinge axis formed integrally with the hinge frame of the hinge frame is inserted into the S-shaped hinge curve part to form a hinge-coupling structure, in an operation model view of the S-shaped hinge curve part, point A is determined at a position of t (=15 mm) on a CE line in a square D, C, E, and q of h×h (50 mm×50 mm), a circle having a ...
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