To provide a floor hatch structure for a pit, which enables a cover plate for a floor hatch to firmly bear a load such as tread pressure at a low cost, and which reduces labor required for maintenance work etc.
In this floor hatch structure for the floor, a pit cover 4 is installed on a cover frame 2 which is provided at the upper end of the pit 1 for drainage etc. , so that the upper end of the pit 1 is closed; a retainer frame 3 for the floor hatch is provided on the side of the outer periphery of the upper end of the pit 1; the cover plate 5 for the floor hatch is installed on the retainer frame 3, so that the pit 1 is brought into the state of being concealed with the cover plate 5 for the floor hatch; and the cover plate 5 and the pit cover 4 are integrated together, so that the load acting on the cover plate 5 is transferred to the pit cover 4.
SHINOHARA MASAO
ISHIHARA YASUTOSHI
UTSUNOMIYA KOGYO KK