JP2015158104A - Cover for floor hatch, and construction method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover for a floor hatch, which can secure a heat insulating function in the case of fire, and a construction method for the same.SOLUTION: A cover for a floor hatch includes: a frame-like frame 11 that closes an opening 101 provided on a floor 100 and having a retainer part 110 provided at a peripheral edge and that is fixed to the retainer part 110; a heat insulating member 12 that is surrounded by the frame 11; and a downside cover 13 that is at least either a top surface or an undersurface of the heat insulating member 12 and that is superposed on the top surface or the undersurface of the heat insulating member 12 on a side of origin of fire. The frame 11 comprises a support piece 11b for supporting the downside cover 13. An outer peripheral part of the downside cover 13 is slidably superposed on the support piece 11b of the frame 11.

Description

  The present invention relates to a floor hatch lid for closing an opening provided on a floor and a method for constructing a floor hatch lid for assembling a floor hatch lid.

  On the floor of the building, floor hatches that lead to the downstairs are provided where appropriate. The floor hatch includes an opening provided on the floor and a floor hatch lid for closing the opening (see, for example, Patent Document 1).

  A receiving portion for placing the outer peripheral portion of the lid is provided on the periphery of the opening. The receiving part is formed, for example, by a stepped part in which the surface of the floor is recessed. The step portion is defined by a continuous vertical plane and a horizontal plane.

  The lid includes a bottom plate, a top plate, a side plate, and a heat insulating material. The outer peripheral part of the bottom plate is placed on the horizontal surface of the receiving part. The top plate faces the bottom plate with a gap. The side plate surrounds the outer periphery of the bottom plate and the outer periphery of the top plate and is connected in a state in which both the outer periphery are constrained. Then, a heat insulating material is packed in a closed region surrounded by the bottom plate, the top plate, and the side plate. With this heat insulating material, heat insulation between the downstairs and the upstairs is ensured.

JP 2000-240275 A

  By the way, when a fire breaks down or on the floor, the bottom plate or top plate of the lid on the fire source side is exposed to a high temperature and thermally expands. On the other hand, the upper floor or the lower floor where no fire has occurred, that is, the top plate or the bottom plate that is not on the fire source side, is not exposed to high temperature and thus does not thermally expand. However, since the bottom plate and the top plate are connected in a state of being constrained by the side plate, the entire cover is warped when the thermally expanding bottom plate or top plate swells in a convex curved shape.

  If it does so, the outer peripheral part of a lid will leave | separate from the horizontal surface of a receiving part, and a clearance gap will arise between a cover and a receiving part. As a result, hot air is transmitted from the lower level to the upper level or from the upper level to the lower level. That is, the conventional floor hatch cannot exhibit a heat insulating function in the event of a fire.

  Then, this invention makes it a subject to provide the construction method of the cover for floor hatches and the cover for floor hatches which enabled it to ensure the heat insulation function at the time of a fire.

  A floor hatch lid according to the present invention is an opening provided on a floor, and is a floor hatch lid that closes an opening having a receiving portion at the periphery thereof, and a frame-like frame fixed to the receiving portion; A heat insulating member surrounded by a frame; and a cover which is at least one of an upper surface and a lower surface of the heat insulating member and is overlapped with an upper surface or a lower surface of the heat insulating member serving as a fire source side, and the frame receives the cover A support piece is provided, and an outer peripheral portion of the cover is overlapped on the support piece of the frame in an unconnected state.

  According to the floor hatch cover, the frame is fixed to the receiving portion at the periphery of the opening provided on the floor, so that the opening of the floor is closed by the heat insulating member and the cover. And when a fire breaks down or on the floor, the cover on the fire source side is exposed to a high temperature and thermally expands. However, the outer periphery of the cover overlaps the frame support piece in a non-connected state and is not constrained, so that the cover keeps the opening closed so as to exert the heat insulating function without pressing the frame. To do.

  Here, as one aspect of the lid for the floor hatch according to the present invention, when a fixed shaft protrudes from the receiving portion, the cover includes an insertion portion that allows the fixed shaft to pass therethrough. It is possible to employ a configuration in which the thermally expanded cover is made larger than the outer diameter of the fixed shaft so that the cover can slide on the support piece of the frame without being obstructed by the fixed shaft.

  The cover for the floor hatch can prevent the cover from being detached from the receiving part by inserting the fixed shaft protruding from the receiving part through the insertion part provided in the cover. And since the insertion part is made larger than the outer diameter of the fixed shaft, the cover that thermally expands in the event of a fire is not obstructed by the fixed shaft, and the outer peripheral part of the cover is planar or on the support piece of the frame. It can move in the state of being overlapped linearly.

  Moreover, the structure provided with the heat insulating material interposed between the said receiving part and the said frame as another aspect of the lid | cover for floor hatches concerning this invention is employable. According to this floor hatch lid, the space between the receiving portion and the frame can be eliminated by the heat insulating material interposed between the receiving portion and the frame, and the heat insulating function of the floor hatch can be improved.

  Further, the floor hatch cover construction method according to the present invention is a frame formed in a frame shape, and has a frame having a support piece extending inwardly on a receiving portion at the periphery of an opening provided on the floor. It includes a step of fixing, a step of overlapping the cover on the support piece of the frame in a non-connected state, and a step of arranging a heat insulating member surrounded by the frame.

  According to this floor hatch construction method, a frame, a cover, and a heat insulating member can be assembled on a floor provided with an opening to complete a lid. The floor hatch lid can be assembled without being limited to the order of the steps described above.

  ADVANTAGE OF THE INVENTION According to this invention, the construction method of the cover for floor hatches and the cover for floor hatches which enabled it to ensure the heat insulation function at the time of a fire can be provided.

FIG. 1 shows an embodiment of a floor hatch cover according to the present invention, FIG. 1 (a) is a plan view, and FIG. 1 (b) is a sectional front view. FIG. 2 shows an embodiment of a floor hatch lid according to the present invention, and is an enlarged cross-sectional front view of a portion II in FIG.

  One embodiment of a floor hatch lid and a method for constructing a floor hatch lid according to the present invention will be described with reference to FIG. 1 (a), FIG. 1 (b) and FIG.

  The floor hatch lid includes an inner lid 10 and an outer lid 20 that close a quadrangular opening 101 provided on the floor 100 so that the opening 101 can be opened when necessary. The inner lid 10 has a heat insulating function that prevents hot air from being transmitted to the floor when a fire occurs, for example, downstairs.

  Prior to detailed description of the inner lid 10, the opening 101 will be described first. On the periphery of the opening 101, a receiving part 110 for placing the outer peripheral parts of the inner lid 10 and the outer lid 20 is provided. The receiving part 110 is formed by a stepped part (not numbered) recessed in a step shape having a continuous vertical surface and a horizontal surface.

  Further, a stepped lower receiving frame 120 and an upper receiving frame 130 are fixed to the lower stepped portion and the upper stepped portion. The lower receiving frame 120 is formed in a crank shape in a cross-sectional front view, and continuously includes a lower horizontal portion 121, a vertical portion 122, and an upper horizontal portion 123. And the fixed axis | shaft 140 protrudes from the lower horizontal part 121 of the lower receiving frame 120 for every fixed space | interval by planar view. The fixed shaft 140 includes, for example, a bolt 141 and a nut 142. A head portion of the bolt 141 is embedded in a lower stepped portion, and a shaft portion of the bolt 141 is vertically upward.

  The upper receiving frame 130 is also formed in a crank shape when viewed from the front, and includes a lower horizontal portion 131, a lower vertical portion 132, an upper horizontal portion 133, and an upper vertical portion 134. The upper horizontal portion 123 of the lower receiving frame 120 and the lower horizontal portion 131 of the upper receiving frame 130 face each other with a gap, and a frame-like heat insulating member 150 along the receiving portion 110 is interposed in this portion. The heat insulating member 150 is made of a material having a high heat resistant temperature such as ceramic fiber. Note that the heat insulating member 150 may not be provided depending on the use situation.

  In this way, the lower receiving frame 120 and the upper receiving frame 130 are discontinuous, or the heat insulating member 150 is interposed between both the discontinuous 120 and 130, so that the receiving portion 110 is generated in the downstairs. Even if the lower receiving frame is heated by the fire, the heat is hardly transmitted to the upper receiving frame 130.

  The upper horizontal portion 123 of the lower receiving frame 120 and the lower horizontal portion 131 of the upper receiving frame 130 are formed with communication holes 123a and 131a at regular intervals in plan view. The cylindrical body 170 surrounding the fastening member 160 is passed through the communication holes 123a and 131a, so that the heat insulating member 150 is located between the upper horizontal portion 123 of the lower receiving frame 120 and the lower horizontal portion 131 of the upper receiving frame 130. It is made not to fall out. The fastening member 160 is configured by, for example, a bolt 161 and a nut 162.

  The inner cover 10 of the floor hatch cover includes a frame-shaped frame 11 fitted into the lower receiving frame 120 of the receiving portion 110, a heat insulating member 12 surrounded by the frame 11, and an upper surface or a lower surface of the heat insulating member 12. A cover (hereinafter referred to as “lower cover”) 13 is provided that is overlaid on at least one of them (in this embodiment, the lower surface is assumed to have a fire source downstairs).

  The frame 11 has a rectangular shape in plan view and a U-shaped cross-sectional front view that fits into the lower receiving frame 120, and includes a web 11a and a support piece projecting inward from the lower end of the web 11a (hereinafter referred to as "lower support piece"). 11b and a support piece (hereinafter referred to as “upper support piece”) 11c protruding inward from the upper end of the web 11a.

  The heat insulating member 12 and the lower cover 13 are disposed inside the frame 11. The heat insulating member 12 is made of a material having a high heat resistant temperature such as ceramic fiber. Ceramic fibers are provided in a flexible, amorphous state or in a fixed state such as a board. Even if the heat insulating member 12 is an irregular ceramic fiber, the heat insulating member 12 is placed on the lower cover 13 so that it does not fall off from the frame 11. Further, even if the heat insulating member 12 is a ceramic fiber such as a board, it is prevented from being bent by being placed on the lower cover 13.

  The outer periphery of the lower cover 13 is placed on the lower support piece 11 b of the frame 11. The lower cover 13 is formed into a thin plate shape with a steel material so as to maintain a flat state without being bent in a normal state. However, the lower cover 13 may be formed in a mesh shape. In any case, the lower cover 13 is thermally expanded when a fire occurs downstairs.

  A heat insulating material 14 is interposed between the outer peripheral portion of the lower cover 13 and the lower support piece 11 b of the frame 11. The heat insulating material 14 is also made of a material having a high heat-resistant temperature such as ceramic fiber, but has a necessary minimum thickness to fill a gap between the lower cover 13 and the lower support piece 11b of the frame 11. Moreover, it is preferable that the heat insulating material 14 has a property of expanding when heated.

  And the thickness of the state in which the heat insulation member 12, the lower cover 13, and the heat insulating material 14 overlap is made the same as the space | interval of the lower side support piece 11b of the flame | frame 11, and the upper side support piece 11c. Therefore, the outer peripheral portion of the upper surface of the heat insulating member 12 overlaps the upper support piece 11 c of the frame 11. Further, the peripheral end surface of the heat insulating member 12 is in contact with the web 11 a of the frame 11.

  The inner lid 10 includes a cover 15 (hereinafter referred to as an “upper cover”) 15 that covers the heat insulating member 12 with a gap therebetween on the upper side of the heat insulating member 12. Handles 10 h are attached to, for example, four places (only two places are shown in FIG. 1) on the upper surface of the upper cover 15. Between the outer periphery of the upper cover 15 and the upper support piece 11c of the frame 11, a heat insulating material 16 such as ceramic fiber is interposed.

  The lower support piece 11b and the upper support piece 11c of the frame 11 and the upper cover 15 are attached to the mounting holes 11d, 11d, and 15d through which the shafts of the bolts 141 protruding from the lower stepped part of the receiving part 110 are inserted. Is formed. However, the shaft portion of the bolt 141 is surrounded by a cylindrical body 17 for isolation from the heat insulating member 12. Therefore, the inner diameters of the mounting holes 11d, 11d, and 15d are the same as the outer diameter of the cylindrical body 17.

  The shaft portion of the bolt 141 may not be surrounded by the cylindrical body 17, and in this case, the lower support piece 11 b and the upper support piece 11 c of the frame 11 and the insertion portion formed in the upper cover 15. The inner diameters of 11d, 11d, and 15d are the same as the outer diameter of the shaft of the bolt 141.

  The lower cover 13 is formed with an insertion portion 13d through which the cylindrical body 17 surrounding the bolt 141 protruding from the lower step portion of the receiving portion 110 is inserted. The insertion portion 13 d is formed in a cutout shape that enters from the edge of the lower cover 13. Therefore, the width of the insertion portion 13 is larger than the outer diameter of the cylindrical body 17, and the lower cover 13 can be thermally expanded in the event of a fire. That is, the depth of the notch entering from the edge of the lower cover 13 is made larger than the distance between the web 11a of the frame 11 and the cylindrical body 17, and the outer periphery of the lower cover 13 is above the lower support piece 11b of the frame 11. Are stacked in a discontinuous state so that they can be moved.

  And the front-end | tip part of the axial part of the volt | bolt 141 protrudes rather than the upper cover 15, and the nut 142 is fastened. The heat insulating material 18 is also interposed between the nut 142 and the upper cover 15, and the insertion portion 15 d of the upper cover 15 is blocked by the heat insulating material 18. The heat insulating material 19 is also interposed between the lower support piece 11b of the frame 11 and the lower horizontal portion of the lower receiving frame 120. The heat insulating material 19 prevents a gap from being generated between the lower support piece 11 b of the frame 11 and the lower horizontal portion 121 of the lower receiving frame 120.

  The outer lid 20 is fitted into the upper receiving frame 130 and closes the opening 101 with a plurality of sheets. The upper surface of the outer lid 20 is flush with the upper surface of the floor 100. The outer periphery of the lower surface of the outer lid 20 is placed on the upper horizontal portion of the upper receiving frame 130 via a cushion material 30 such as rubber. An air layer 40 is provided between the outer lid 20 and the inner lid 10.

  The inner lid 10 as described above may be closed to the opening 101 provided on the floor 100 in an assembled state, or carried to the floor 100 provided with the opening 101 in a state of being disassembled into parts. The floor 100 may be assembled.

  Here, a lid construction method including a method of assembling the inner lid 10 on the floor 100 will be described. First, the outer peripheral portions of the heat insulating material 14 and the lower cover 13 are placed on the lower support piece 11 b of the frame 11. Then, the cylindrical body 17 is inserted into the mounting holes 11 d and 11 d of the lower support piece 11 b and the upper support piece 11 c of the frame 11 and the insertion portion 13 d of the lower cover 13, and the heat insulating member 12 is placed on the lower cover 13.

  Next, this is fitted into the lower receiving frame 120 of the receiving portion 110, and the bolt 141 of the fixed shaft 140 is inserted into the cylindrical body 17. On the lower horizontal portion 121 of the lower receiving portion 120, the heat insulating member 19 is placed. And the front-end | tip part of the volt | bolt 141 protrudes from the upper side support piece 11c of the flame | frame 11. FIG.

  Then, after the heat insulating material 16 is placed on the upper support piece 11 c of the frame 11, the upper cover 15 is covered with the heat insulating member 12. And after putting the heat insulating material 18 in the part of the insertion part of the upper cover 15, the nut 142 is fastened to the front-end | tip part of the volt | bolt 141. FIG. When the nut 142 is fastened to the shaft portion of the bolt 141, the inner lid 10 is fixed to the receiving portion 110 so that it does not come off from the receiving portion 110 even if it receives wind pressure from below.

  The upper cover 15 of the inner lid 10 is positioned on substantially the same plane as the lower horizontal portion 131 of the upper receiving frame 130. Then, the outer peripheral portion of the outer lid 20 is placed on the upper horizontal portion 133 of the upper receiving frame 130. In this way, the opening 101 of the floor 100 is closed by the inner lid 10 and the outer lid 20. The upper surface of the floor 100 and the upper surface of the outer lid 20 are flush with each other so that the upper lid does not obstruct the passage.

  If necessary, the outer lid 20 is removed from the upper receiving frame 130, the nut 142 to which the inner lid 10 is fixed is removed from the bolt 141, and the inner lid 10 is removed from the lower receiving frame 120 to open the opening 101. be able to.

  However, normally, the opening 101 of the floor 100 is closed by the inner lid 10 and the outer lid 20. Therefore, even if a fire occurs in the downstairs, the heat from the fire is blocked by the heat insulating member 12 of the inner lid 10 and the air layer 40 so as not to go upstairs.

  At this time, the lower cover 13 is exposed to a high temperature and thermally expands. However, the insertion portion 13d of the lower cover 13 is made larger than the outer diameter of the cylindrical body 17, and the outer peripheral portion of the lower cover 13 overlaps the lower support piece 11b of the frame 11 in a planar or linear manner. Can move. Even if the lower cover 13 has a convex curved shape that swells downward, the lower cover 13 and the lower support piece 11b of the frame 11 are kept in contact with the edges of the lower cover 13 and the insertion portion 13d. There is no gap between them.

  In the case where the heat insulating material 14 has a function of thermal expansion, even if the lower cover 13 floats from the lower support piece 11b of the frame 11, the lifted lower cover 13 and the frame 11 The heat insulating property can be enhanced by the presence of the expanded heat insulating material 14 between the lower support piece 11.

  Therefore, the outer peripheral part of the inner lid 10 and the lower receiving frame 120 of the opening 101 are maintained in a joined state. For this reason, this floor 100 hatch can continue to exhibit a heat insulating function in the event of a fire downstairs.

  The present invention can be variously modified without being limited to the above embodiment. In the above embodiment, the lower cover 13 is slidable on the lower support piece 11b of the frame 11 on the assumption that there is a fire source on the downstairs. However, when there is a fire source on the floor, the upper cover 15 may be slidable on the upper support piece 11 c of the frame 11. In addition, when there is a fire source on the lower and upper floors, the lower cover 13 can slide on the lower support piece 11b of the frame 11, and the upper cover 15 can slide on the upper support piece 11c of the frame 11. Good.

  Further, depending on the floor 100, the receiving portion 110 of the opening 101 is formed with only one stepped portion. In this case, the inner lid 10 also serves as the outer lid 20. In this case, the inner lid 10 has such a strength that the front end portion of the bolt 141 does not protrude from the upper cover 15 and the upper cover 15 does not deform even if it is stepped on.

  Moreover, in the said embodiment, although the flame | frame 11 was provided with the upper side support piece 11c, it is good also as not having the upper side support piece 11c but making it the cross-sectional L-shape provided with the lower side support piece 11b and the web 11a. Further, the frame 11 may be provided with a fixing piece (not shown) outward from the web 11a. Moreover, in the said embodiment, the flame | frame 11 was equipped with the notch-shaped insertion part 13d. However, the insertion portion 13d may be formed in a through hole shape.

  Moreover, the construction method of the inner lid 10 in the said embodiment assembled the inner lid 10, and fitted the assembled inner lid 10 in the receiving part 110. As shown in FIG. However, the frame 11 on which the lower cover 13 is set may be fitted into the receiving portion 110, and then the heat insulating member 12 may be set in the frame 11, and then the upper cover 15 may be set. And the thing of the state which set the heat insulation member 12 may be inserted in the receiving part 110, and the upper cover 15 may be set after that.

10 ………… Lid (inner lid)
11 ………… Frame 11b ………… Supporting piece (lower supporting piece)
11d: mounting hole 12: heat insulating member 13: cover (lower cover)
13d ......... Insertion part 14 .... Insulation material 16 ... ... Insulation material 100 ... ... Floor 101 ... ... Opening part 110 ... ... Reception part

Claims (4)

In a floor hatch lid that is an opening provided on the floor and closes an opening having a receiving portion on the periphery,
A frame-like frame fixed to the receiving portion, a heat insulating member surrounded by the frame, and at least one of an upper surface or a lower surface of the heat insulating member and overlapped with an upper surface or a lower surface of the heat insulating member that becomes the fire source side With a cover that is
The frame includes a support piece for receiving a cover;
A floor hatch lid, wherein an outer peripheral portion of the cover is overlaid in a non-connected state on a support piece of the frame. When a fixed shaft protrudes from the receiving part,
The cover includes an insertion portion through which the fixed shaft is inserted, and the insertion portion is fixed so that the cover is slidable on the support piece of the frame without the thermally expanded cover being obstructed by the fixed shaft. The floor hatch cover according to claim 1, wherein the lid is larger than the outer diameter of the shaft.   The floor hatch cover according to claim 1 or 2, further comprising a heat insulating material interposed between the receiving portion and the frame.   A frame formed in a frame shape and having a support piece extending inwardly fixed to a receiving portion at the periphery of an opening provided on the floor, and a cover is not connected to the frame support piece A method for constructing a lid for a floor hatch, comprising: a step of superimposing and a step of arranging a heat insulating member surrounded by a frame.

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