HINGE STRUCTURE OF COVER FOR UNDERGROUND STRUCTURE: Fid-Bau Portal

HINGE STRUCTURE OF COVER FOR UNDERGROUND STRUCTURE

INOUE NAOHARU

To provide a hinge structure that facilitates the opening and closing operation of a cover body.SOLUTION: A hinge structure of a cover for an underground structure in which a hinge member is switchable between a fully closed state in which an opening is closed by a cover body and a fully open state in which the opening is fully opened by rotating the cover body upward from the fully closed state via the hinge member. A receiving frame includes: a cover mounting portion for mounting the cover body; a hinge mounting portion arranged around the cover mounting portion for mounting the hinge member; and a guide wall capable of guiding the hinge member in a vertical direction. An upper end portion of the hinge member is swingably supported on an installation portion of the cover body via a substantially horizontal shaft member above the hinge mounting portion. On a lower end side of the hinge member, on the lower side of the hinge mounting portion, an extended portion bent from the upper end portion is extended so as to fit in a storage space below the hinge mounting portion over the fully closed state and the fully opened state of the cover body. The hinge mounting portion has a restricting member capable of restricting the upward movement of the extended portion when the cover body is fully opened.SELECTED DRAWING: Figure 7

【課題】蓋本体の開閉操作が容易な蝶番構造の提供を目的とする。【解決手段】蝶番部材が、蓋本体で前記開口部を閉じた全閉状態と、蓋本体を全閉状態から蝶番部材を介して上方に回動することで開口部を全開にした全開状態とに切替え可能とされた地下構造物用蓋の蝶番構造であって、受枠は、蓋本体を取付ける蓋取付部と、蓋取付部の周囲に配置されて蝶番部材を取付ける蝶番取付部と、蝶番部材を上下方向に案内可能な案内壁とを備え、蝶番部材の上端部側は、蝶番取付部の上側において、略水平な支軸部材を介して蓋本体の設置部に揺動可能に枢支され、蝶番部材の下端部側には、蝶番取付部の下側において、蓋本体の全閉状態および全開状態に渡って、蝶番取付部の下方側の収納スペースに収まるように、上端部側に対して折曲された延設部が延長され、蝶番取付部は、蓋本体の全開状態のときに、延設部の上動を制限可能な制限部材を備えている。【選択図】図７

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