To provide a floor hatch capable of facilitating fitting of an inner frame to an outer frame, and improving the assembling work efficiency to reduce the cost.
This floor hatch includes the outer frame 4 provided along the inner periphery of a rectangular opening part 3 formed in a suitable place of a floor material of a building, the inner frame 11 covering the outer periphery of a lid member 10 capable of freely opening and closing the opening part 3, and received by a horizontal plate part 12 at the lower end of the outer frame 4, and a rotary support connecting member 16 interposed between the inner frame 11 and the outer frame 4 and rotatably supporting the inner frame 11. The rotary support connecting member 16 is integrally provided with a plate part 17 pointing in the vertical direction, a plate part 28 projected from the vicinity of the upper end of the plate part 17, and a shaft part 30 connected to the upper end part of the plate part 28. The shaft part 30 of the rotary support connecting part 16 is fitted in a groove 26 of an engaging part 27 projected toward the outside of the upper end of the inner frame 11 along one side of the lid member 10, and in such a condition, the plate part 17 pointing in the vertical direction of the rotary support connecting member 16 is superposed on a plate part 8 pointing in the vertical direction of the outer frame 4 and fastened with a screw 31.
TAKAHASHI MASAKI
FUJIKAWA KATSUNOBU
