| 摘要 |
PROBLEM TO BE SOLVED: To provide a light-weight and low-cost device for opening/closing a fire hose passage aperture comprised of a small number of components. SOLUTION: A small door 1 is openably/closably attached to a fire hose passage aperture provided on the lower edge part of a fire door through a hinge 2. The small door 1 includes a main body plate part 5 made of a sheet metal and folded to be horizontal rectangle, which upwardly/downwardly moves, a flat bottom plate part 6 connected perpendicular to the lower edge that is one longer edge of the main body plate part 5, the upper plate part 7 narrower than the bottom plate part 6 and connected perpendicular to the upper edge that is the other longer edge of the main body plate part 5, a magnet attaching plate part 8 upwardly connected perpendicular to the tip of the upper plate part 7, side plate parts 9, 10 connected to both sides that are two shorter edges of the main body plate part 5, respectively, and an attachment plate part 11 of the hinge 2 provided so as to outwardly thrust perpendicular from the end of the side plate part 9 out of these side plate parts 9, 10. COPYRIGHT: (C)2009,JPO&INPIT
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