Hinode, Ltd.

Norio Shinohara

Yukinori Gondou

Masakazu Hidaka

Kenichi Koga

Kazumi Tanaka

Eiichiro Saeki

Takefumi Andou

Tomokazu Hasegawa

An inner peripheral portion of a receiving frame and an outer peripheral portion of a lid body each include first and second surface parts. In the closed-lid state, the first surface part of the lid body is supported by the first surface part of the frame, each of which include a gentle gradient. The second surface parts of the lid body and the receiving frame are pressed against each other by a force caused by elastic deformation of at least one of the outer peripheral portion of the lid body and the inner peripheral portion of the receiving frame. The second surface part of the receiving frame includes a steeper gradient than the first surface part of the receiving frame by reducing its diameter toward a downward direction of the receiving frame.

Lid for underground structure

An underground structure cover comprises a cover body () and a receiving frame () arranged so that the cover body is fitted in and supported by the receiving frame in the manner that an inclined surface () of the outer circumference of the body meets an inclined surface () of the inner circumference of the frame. The inclined surfaces () each have an upper inclined surface () and a lower inclined surface (), and the lower inclined surfaces () are steeper than the upper inclined surfaces (). The body () is fitted in and supported by the part () at the upper inclined surfaces () and the lower inclined surfaces (). By this, the body is prevented from being wedged into the frame too deeply and also from becoming inclined with respect to the frame or riding up.

Underground structure cover

Growing community of inventors

Fukuoka, Japan

Norio Shinohara