Building materials

Abstract

To improve the fire resistance of objects equipped with auxiliary sash screens.SOLUTION: A double glazing 35 and a ventilation unit 40 are arranged between two vertical frames 33 and 34. The double glazing 35 is arranged between the two vertical frames 33 and 34 in a state in which the edge portions on both sides are accommodated with respect to accommodating portions 33a and 34a provided in the portions of the two vertical frames 33 and 34 facing each other. The ventilation unit 40 is provided with sub-vertical frames 413 on both sides. The sub-vertical frames 413 are arranged between the two vertical frames 33 and 34 in a state of being engaged with the vertical frames 33 and 34, respectively. A heated foaming material C3 is arranged at a portion of the accommodating portions 33a and 34a where the vertical frames 33 and 34 and the sub-vertical frame 413 face each other.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to building materials, and more particularly to fire prevention measures for building materials that have secondary shoji screens between building materials such as frames and stiles. [Background technology]

[0002] Some building materials are equipped with a secondary shoji screen for ventilation inside the frame that makes up a shoji screen. A secondary shoji screen has a secondary panel supported between secondary building materials so that it can be opened and closed, and is disposed, for example, on top of the shoji screen. With this type of building material, if the secondary shoji screen is opened, ventilation can be performed even when the shoji screen is closed, which is advantageous in terms of operability and crime prevention (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-8451 Summary of the Invention [Problem to be solved by the invention]

[0004] Nowadays, building materials are often required to have high fire resistance. In the case of building materials that do not have secondary shoji screens, for example, fire resistance is enhanced by disposing a thermal expansion member between the frame and the surface material that make up the shoji screen. In other words, in this building material, when the shoji screen is exposed to high temperatures, the thermal expansion member expands, sealing the gap between the frame and the surface material, preventing the formation of a flame hole in the interior or exterior direction.

[0005] On the other hand, to improve the fire resistance of building materials equipped with secondary shoji screens, it is possible to install a thermal expansion member between the frame of the shoji screen and the face material, as well as between the secondary building material and the secondary face material of the secondary shoji screen. With such building materials, it is possible to prevent the formation of physical penetration holes between the secondary building material and the secondary face material of the secondary shoji screen. However, in actual building materials, there is a concern that flames may occur on the non-heated side of the secondary shoji screen, and there is still room for improvement. That is, in building materials equipped with secondary shoji screens, there is a space between the secondary building material and the frame of the shoji screen, and this space is connected to the gap between the frame and the face material. Therefore, if flammable gas is generated from the face material due to exposure to high temperatures, it may reach the gap between the secondary building material and the frame of the shoji screen. If this flammable gas is further released onto the non-heated side of the secondary shoji screen, it may cause a flame.

[0006] The above-mentioned problem is not limited to the area between the frame of a shoji screen and the secondary shoji screen, but can also occur in fixed windows in which a panel and secondary shoji screen are arranged on a frame.

[0007] In view of the above circumstances, the present invention aims to provide a fitting that can improve the fire resistance of an object equipped with a secondary shoji screen. [Means for solving the problem]

[0008] In order to achieve the above object, the fitting according to the present invention comprises a frame body and a shoji screen disposed on the frame body, the shoji screen having a surface material and a ventilation unit inside the four-sided assembled building material, the ventilation unit having a sub-frame body and a secondary surface material supported inside the sub-frame body via a sub-bottom frame that constitutes the sub-frame body so as to be able to open and close, a latch that maintains the secondary surface material in a closed position is provided between the sub-upper frame that constitutes the sub-frame body and the secondary surface material, and the sub-vertical frame, the sub-upper frame, and the sub-bottom frame that constitute the sub-frame body each have a latch that faces inward on the room side. an inner fin portion is provided on each of the sub-upper frame and the sub-vertical frame, and an inner seal member is attached to the visible surface of the inner fin portion facing the interior of the room; an outer fin portion is provided on the outer periphery of each of the sub-upper frame and the sub-vertical frame on the exterior side of the room, and an outer seal member is attached to the outer fin portion; the sub-surface material has a face plate portion that abuts against the inner seal member from the interior side when the sub-surface material is placed in the closed position, and a square tube portion that is provided on the visible surface of the face plate portion facing the exterior of the room and abuts against the outer seal member; and a lower edge portion of the face plate portion is rotatably supported by the sub-lower frame, The inner fin portion of the secondary lower frame has a portion that is located on the inner circumferential side of the rotation support portion of the secondary face material, and the inner seal member is attached to the inner circumferential side portion, A thermal expansion member is provided between the sub-frame body and the sub-surface material at a portion closer to the outdoor space than the inner sealing member. [Effects of the Invention]

[0009] According to the present invention, when the building material is exposed to high temperatures, the expansion of the thermally expandable member closes the storage space between the building material and the secondary building material. Therefore, even if flammable gas is generated from the surface material, this flammable gas will not reach the secondary screen, eliminating the risk of it catching fire on the unheated side of the secondary screen. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a view of a fitting according to an embodiment of the present invention as seen from the inside of a room. [Figure 2] FIG. 2 is a vertical cross-sectional view of the fitting shown in FIG. 1. [Figure 3] FIG. 2 is a cross-sectional view of the fitting shown in FIG. 1, taken at the sub-shōji portion. [Figure 4]FIG. 2 is a cross-sectional view of the fitting shown in FIG. 1, cut at the surface material portion. [Figure 5] FIG. 2 is an exploded cross-sectional view of the fitting shown in FIG. 1 with the sub-sash removed from the inner sash. [Figure 6] This shows the sub-shōji screen that is applied to the fixture shown in Figure 1, where (a) is a view from inside the room and (b) is a view from outside the room. [Figure 7] FIG. 7 is a vertical cross-sectional view of the secondary shoji screen shown in FIG. 6 with the secondary panel member positioned in the closed position. [Figure 8] FIG. 7 is a vertical cross-sectional view of the secondary shoji screen shown in FIG. 6 with the secondary panel member positioned in the open position. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the fittings according to the present invention will be described in detail below with reference to the accompanying drawings. 1 to 4 show a fitting that is an embodiment of the present invention. The fitting illustrated here is a so-called sliding window, in which two shoji screens, inner and outer, 20 and 30, are arranged so that they can slide left and right relative to a frame body 10. The frame body 10 is formed into a rectangular shape by framing it all around with an upper frame 11, a lower frame 12, and left and right vertical frames 13 and 14.

[0012] The outer shoji screen 20, which is disposed on the exterior side of the frame body 10, is constructed by arranging a rectangular double-glazed glass 25 inside a top frame 21, a bottom frame 22, and left and right vertical frames 23, 24, which are all framed together. The inner shoji screen 30, which is disposed on the interior side of the frame body 10, is constructed by arranging a rectangular double-glazed glass (face material) 35 and a rectangular ventilation unit (sub-shoji screen) 40 adjacent to each other above and below inside a top frame 31, a bottom frame 32, and left and right vertical frames (building materials) 33, 34, which are all framed together. The double-glazed glass 25 of the outer shoji screen 20 and the double-glazed glass 35 of the inner shoji screen 30 are each constructed by bonding multiple (e.g., two) glass sheets G together via spacer members S.

[0013] The outer shoji screen 20 and the inner shoji screen 30 are formed to have dimensions that are approximately the same along the left and right, and that allow the frame body 10 to be closed when the joining vertical frames 23, 33 are arranged side by side in the forward direction. In this embodiment, an example is shown of a fixture in which, when the frame body 10 is closed, the outer shoji screen 20 is arranged on the left side as viewed from the inside of the room, and the inner shoji screen 30 is arranged on the right side as viewed from the inside of the room. However, this is not necessarily limited to this, and it is also acceptable for the window to be a sliding window in which the inner shoji screen 30 and the outer shoji screen 20 are arranged left and right in reverse.

[0014] Here, the aforementioned projection direction is the direction along the depth of the fixture, as shown by arrow A in the figure. A surface along the projection direction may be referred to as a projection surface. Furthermore, in this embodiment, for convenience, the term "finding direction" is also used. In the case of building materials that extend horizontally, such as the upper frame 11 and lower frame 12, the projection direction is the direction along the top and bottom that is perpendicular to the projection direction. In the case of building materials that extend vertically, such as vertical frames 13 and 14, the horizontal direction that is perpendicular to the projection direction is called the projection direction. A surface along the projection direction may be called a projection surface.

[0015] The configuration of the inner shoji screen 30 equipped with the ventilation unit 40 will be described in detail below, along with an explanation of the characteristic features of the present invention.

[0016] The upper frame 31, lower frame 32, and left and right vertical frames (building materials) 33, 34 that make up the inner shoji screen 30 are extruded shapes formed from metal such as aluminum alloy, and are configured to have a nearly uniform cross-sectional shape along their entire length. As shown in Figures 2 and 5, these frames 31, 32, 33, 34 have storage sections 31a, 32a, 33a, 34a formed on the inner peripheral surfaces facing each other. The storage sections 32a, 33a, 34a of the lower frame 32 and the left and right vertical frames 33, 34 accommodate the edges of the double-glazed glass 35 when the glazing channel B is installed, and are formed between support fins 32b, 33b, 34b that protrude from the inside and outside of the room so as to face each other.

[0017] The double-glazed glass 35 has approximately the same left-right dimensions as the double-glazed glass 25 of the outer shoji screen 20, and both edges are housed in the housing portions 33a, 34a of the vertical frames 33, 34, respectively. The top-to-bottom dimensions of the double-glazed glass 35 are shorter than those of the double-glazed glass 25 of the outer shoji screen 20. Therefore, the lower edge of the double-glazed glass 35 is housed in the housing portion 32a of the bottom frame 32, while there is a gap between the upper edge and the top frame 31. Note that the reference numeral 36 in Figure 2 denotes a setting block that is interposed between the bottom frame 32 and the end face of the double-glazed glass 35 to position the double-glazed glass 35 relative to the inner shoji screen 30.

[0018] Heat-foamable materials C1 are disposed along the entire length of the housing sections 33a, 34a of the vertical frames 33, 34. The heat-foamable materials C1 are non-combustible or flame-retardant fire-resistant materials that expand when heated. For example, so-called expandable graphite, which contains thermally expandable graphite, can be used as this type of heat-foamable material C1.

[0019] As shown in Figures 5 to 8, the ventilation unit 40 comprises a rectangular sub-frame body 410 and a sub-surface material 420 supported by the sub-frame body 410 in a state in which the opening of the sub-frame body 410 is opened and closed, and is arranged in a rectangular area formed between the upper frame 31, the left and right vertical frames 33, 34, and the upper edge surface of the double-pane glass 35.

[0020] The sub-frame body 410 is formed by framing all four sides of a sub-upper frame 411, a sub-lower frame 412, and left and right sub-vertical frames (secondary building materials) 413. The sub-upper frame 411, the sub-lower frame 412, and the left and right sub-vertical frames 413 are extruded shapes formed from a metal such as an aluminum alloy, and are configured to have a substantially uniform cross-sectional shape along the entire length.

[0021] The sub-upper frame 411 has a flat upper frame base 411a extending almost horizontally along the front of the room. An inner upper abutment fin 411b extends downward from the underside of the upper frame base 411a, which faces the room interior. An outer upper abutment fin 411c extends downward from the edge of the underside of the upper frame base 411a, which faces the room exterior. The outer upper abutment fin 411c protrudes more than the inner upper abutment fin 411b, and its lower edge is bent at an almost right angle toward the room interior. Sealing members 415 and 416 are attached to the interior-facing surfaces of the inner upper abutment fin 411b and outer upper abutment fin 411c, respectively. In addition, two mating upper fins 411d, 411e and an upper screw hole 411f are provided on the upper surface of the upper frame base 411a. The mating upper fins 411d, 411e protrude upward from the upper surface of the upper frame base 411a. The distance between the outer surfaces of these two mating upper fins 411d, 411e is configured to be a dimension that allows them to fit into the storage section 31a of the upper frame 31. The upper screw hole 411f is open on both the left and right ends and is formed in the area between the two mating upper fins 411d, 411e.

[0022] The sub-bottom frame 412 has a flat bottom frame base 412a extending almost horizontally along the front of the frame. Two engaging fins 412b extending downward are provided on the outside and inside edges of the bottom frame base 412a, respectively. An inner trapezoidal fin 412c is provided on the top surface of the bottom frame base 412a at a location approximately midway along the front of the frame. The two engaging fins 412b form a sub-frame storage section 412d between the bottom frame base 412a and the bottom frame base 412a, which has the same dimensions as the storage section 31a of the upper frame 31. The inner trapezoidal fin 412c protrudes upward from the top surface of the bottom frame base 412a, then bends at an approximately right angle and extends almost horizontally toward the inside of the frame. A lower screw hole 412e is provided at the bent inner corner of the inner trapezoidal fin portion 412c, and a seal member 417 is attached to the extending edge of the inner trapezoidal fin portion 412c. Like the upper screw hole 411f, the lower screw hole 412e is configured to be open at both left and right ends. In addition, a support base fin portion 412f is provided on the visible surface facing the interior of the room of the engaging fin portion 412b provided on the interior side. The support base fin portion 412f is flat and extends almost horizontally from the engaging fin portion 412b toward the interior side of the room. A hinge shaft element 412g is provided on the upper surface of the support base fin portion 412f, forming a profile hinge between it and the secondary panel 420, which will be described later.

[0023] The left and right sub-vertical frames 413 are symmetrical to each other. In this embodiment, the sub-vertical frame 413 is constructed by providing an inner vertical abutment fin portion 413b and an outer vertical abutment fin portion 413c on a flat vertical frame base 413a extending approximately vertically along the front-view direction. The inner vertical abutment fin portion 413b extends inward from the interior side of the opposing inner surfaces of the vertical frame base 413a. The outer vertical abutment fin portion 413c extends inward from the exterior side of the opposing inner surfaces of the vertical frame base 413a, and has a larger protruding dimension than the inner vertical abutment fin portion 413b. Sealing members 418, 419 are attached to the interior-facing surfaces of the inner vertical abutment fin portion 413b and the outer vertical abutment fin portion 413c, respectively. Furthermore, two fitting vertical fins 413d, 413e are provided on the outer surface of the vertical frame base 413a. The fitting vertical fins 413d, 413e protrude outward from the outer surface of the vertical frame base 413a. The distance between the outer surfaces of these two fitting vertical fins 413d, 413e is dimensioned to allow them to fit into the storage sections 33a, 34a of the vertical stiles 33, 34.

[0024] These sub-vertical frames 413 have screw insertion holes (not shown) at positions corresponding to the upper screw holes 411f of the sub-upper frame 411 and the lower screw holes 412e of the sub-lower frame 412, and screws 430 are threaded into the upper screw holes 411f and the lower screw holes 412e through these screw insertion holes to form the sub-frame body 410 together with the sub-upper frame 411 and the sub-lower frame 412. When the sub-frame body 410 is formed, the seal member 417 provided on the inner trapezoidal fin portion 412c of the sub-lower frame 412, the seal member 415 provided on the inner upper abutting fin portion 411b of the sub-upper frame 411, and the seal member 418 provided on the inner vertical abutting fin portion 413b of the sub-vertical frame 413 are all arranged on the same vertical plane. Furthermore, the seal member 419 provided on the outer vertical contact fin portion 413c and the seal member 416 provided on the outer upper contact fin portion 411c of the sub-upper frame 411 are arranged on the same vertical plane.

[0025] 2 and 3, the sub-frame 410 having the above-mentioned configuration is attached to the upper part of the inner sash 30 by fitting the upper fitting fins 411d, 411e on the sub-upper frame 411 into the storage section 31a of the upper frame 31, and fitting the vertical fitting fins 413d, 413e on the sub-vertical frame 413 into the storage sections 33a, 34a of the vertical frames 33, 34, respectively. In this state, the upper edge of the double-glazed glass 35 is housed in the sub-frame storage section 412d formed by the engaging fins 412b of the sub-bottom frame 412, and the gap between the upper frame 31 and the double-glazed glass 35 is closed by the ventilation unit 40. Although not shown in the figure, the engaging fins 412b protruding from both sides of the base 412a of the sub-bottom frame 412 are inserted into the receiving portions 33a, 34a through notches provided in the vertical frames 33, 34, respectively, and function to prevent the sub-frame body 410 from moving vertically relative to the vertical frames 33, 34. Therefore, the double-glazed glass 35 of the inner shoji screen 30 is supported on all four sides by the sub-bottom frame 412 of the sub-frame body 410, the bottom frame 32 of the frame body 10, and the left and right vertical frames 33, 34.

[0026] As shown in FIGS. 5 to 8, the secondary panel 420 is constructed by attaching side plates 422 to both side ends of a panel base 421. The face material base 421 is formed by integrally molding a face plate portion 421a in the shape of a rectangular flat plate and a square tube portion 421b provided on the surface of the face plate portion 421a facing the outside of the room.

[0027] The face plate portion 421a is sized so that it can be placed in the rectangular opening formed by the upper sub-frame 411, the lower sub-frame 412, and the left and right sub-vertical frames 413. More specifically, the top and bottom of the face plate portion 421a are sized so that it can simultaneously cover the seal member 415 provided on the inner upper abutment fin portion 411b of the upper sub-frame 411 and the seal member 417 provided on the inner trapezoidal fin portion 412c of the lower sub-frame 412. The left and right sides of the face plate portion 421a are formed with dimensions smaller than the distance between the outer vertical abutment fin portions 413c of the lower sub-vertical frame 413. A hinge receiving element 421c is provided on the lower edge of this face plate portion 421a. The hinge receiving element 421c forms a profile hinge with the hinge shaft element 412g of the lower sub-frame 412 described above. That is, the hinge receiving element 421c engages with the hinge shaft element 412g of the sub-bottom frame 412, thereby rotatably supporting the face plate portion 421a relative to the sub-bottom frame 412. In this embodiment, the profile hinge is configured so that the face plate portion 421a can rotate around a hinge shaft extending horizontally to the left and right. This allows the face plate portion 421a to move between a closed position along the vertical direction as shown in FIG. 7 and an open position in which the upper edge protrudes into the room as shown in FIG. 8. When the face plate portion 421a is positioned in the closed position, the seal member 415 of the inner upper abutment fin portion 411b and the seal member 417 of the inner trapezoidal fin portion 412c are each pressed against the surface of the face plate portion 421a facing the outside. On the other hand, when the face plate portion 421a is placed in the open position, the seal member 415 of the inner upper abutting fin portion 411b and the seal member 417 of the inner trapezoidal fin portion 412c are spaced apart from the face plate portion 421a.

[0028] In addition, reference numeral 440 in FIG. 8 denotes a link mechanism provided between the sub-vertical frame 413 of the sub-frame body 410 and the sub-panel 420. This link mechanism 440 limits the opening angle of the sub-panel 420 relative to the sub-frame body 410 by abutting a slider 441 provided on the sub-frame body 410 against a stopper member 442. In addition, reference numeral 450 in FIG. 7 denotes a latch that engages with the sub-frame body 410 when the sub-panel 420 is positioned in the closed position, thereby maintaining the sub-panel 420 in the closed position. In other words, to move the sub-panel 420 from the closed position to the open position, the latch 450 must be released. In addition, when the sub-panel 420 from the open position is moved to the closed position, the latch 450 automatically engages.

[0029] As shown in Figures 5 to 8, when the face plate portion 421a is positioned in the closed position, the lower outer periphery of the rectangular tube portion 421b faces the inner trapezoidal fin portion 412c of the sub-bottom frame 412, and the upper corner on the exterior side abuts against the sealing member 416 provided on the outer upper abutment fin portion 411c of the sub-upper frame 411. As is clear from the figures, the rectangular tube portion 421b has screw holes 421d at the top and bottom. The screw holes 421d are open at both the left and right ends. The upper screw hole 421d is provided on the lower inner periphery of the rectangular tube portion 421b, and the lower screw hole 421d is provided on the lower outer periphery of the rectangular tube portion 421b.

[0030] The side plates 422 attached to both end portions of the face material base 421 are symmetrical to each other. In this embodiment, the side plates 422 are configured to have a flat side plate base 422a large enough to cover the opening of the rectangular tube portion 421b, and a face plate extension 422b bent outward at a nearly right angle from the edge of the side plate base 422a located on the indoor side.

[0031] The side plate base 422a has screw insertion holes (not shown) at positions corresponding to the screw holes 421d of the rectangular tube portion 421b. The side plate 422 is attached to both side end portions of the face material base 421 by threading screws 431 into the screw holes 421d through the screw insertion holes in the side plate base 422a. The face plate extensions 422b are arranged on both sides of the face plate portion 421a on extensions of the face plate portion 421a, and are formed with dimensions that allow them to simultaneously abut against the seal members 418 provided on the inner vertical abutment fin portions 413b of the sub-vertical frame 413.

[0032] As is clear from the figures, heat-foaming materials (secondary thermally expandable members) C2 are provided on all four sides between the sub-frame 410 and the secondary panel 420. The heat-foaming materials C2 are the same type as the heat-foaming materials C1 provided on the vertical frames 33 and 34. In this embodiment, as shown in FIGS. 5 and 7, heat-foaming materials C2 are provided on the underside of the upper frame base 411a of the secondary upper frame 411 facing the secondary panel 420, and on the upper side of the inner platform-shaped insertion portion of the secondary lower frame 412 facing the secondary panel 420. Heat-foaming materials C2 are also provided on the surface of the face panel extension 422b of the side plate 422 facing the outside. The latch receiver 451 of the latch 450 described above is provided on the underside of the upper frame base 411a of the secondary upper frame 411 facing the secondary panel 420. For this reason, the heat-foaming material C2 is disposed on both sides of the underside of the upper frame base 411a so as to be divided by the latch receiver 451, and the heat-foaming material C2 is also disposed on the surface of the latch receiver 451. Furthermore, the heat-foaming material C2 disposed on the face plate extension 422b of the side plate 422 can be touched by hand when the secondary face plate 420 is moved to the open position. For this reason, the heat-foaming material C2 on the face plate extension 422b is prevented from peeling off from the face plate extension 422b by the pressing member 460. The pressing member 460 is integrally formed with a flat mounting plate portion 460a and a pressing plate portion 460b bent at a substantially right angle from one edge of the mounting plate portion 460a, and is attached to the outer surface of the side plate base 422a via the mounting plate portion 460a with the pressing plate portion 460b abutting the surface of the heat-foaming material C2. In this embodiment, in particular, the screws 431 that attach the side plate 422 to the surface material base 421 are used to attach the pressing member 460 to the side plate base 422a.

[0033] Furthermore, in this ventilation unit 40, a heat-expandable material (thermally expandable member) C3 is disposed on the vertical frame base 413a of the sub-vertical frame 413 in a portion facing the storage sections 33a, 34a of the vertical stiles 33, 34, and a heat-expandable material C3 is also disposed on the underside of the lower frame base 412a of the sub-bottom frame 412 facing the sub-frame storage section 412d. These heat-expandable materials C3 are the same type as the heat-expandable material C1 disposed on the vertical stiles 33, 34. As described above, the heat-expandable material C1 is disposed over the entire length of the storage sections 33a, 34a of the vertical stiles 33, 34. Therefore, the heat-expandable material C1 disposed on the vertical stiles 33, 34 and the heat-expandable material C3 disposed on the sub-vertical frame 413 are disposed between the sub-vertical frame 413 and the vertical stiles 33, 34.

[0034] In addition, in this building fixture, as shown in Figure 2, heated foam material C4 is also arranged in the storage section 31a of the upper frame 31, and as shown in Figure 5, heated foam material C5 is also arranged together with reinforcing material D in the hollow section 33c of the vertical frame 33, which is the joint position.

[0035] In the inner shoji screen 30 configured as described above, when the panel portion 421a of the secondary panel 420 is placed in the closed position, the seal member 415 of the inner upper abutting fin portion 411b, the seal member 417 of the inner trapezoidal fin portion 412c, and the seal member 418 of the inner vertical abutting fin portion 413b are each in contact with the panel portion 421a. Therefore, when the panel portion 421a is placed in the closed position, ventilation through the sub-frame body 410 is blocked, and ventilation through the ventilation unit 40 is not performed.

[0036] On the other hand, when the face plate 421a is placed in the open position, the seal member 415 of the inner upper abutment fin 411b, the seal member 417 of the inner trapezoidal fin 412c, and the seal member 418 of the inner vertical abutment fin 413b are separated from the face plate 421a, and the sub-frame 410 is in an open state. As a result, even when the frame 10 is closed by the shoji screens 20 and 30, if the latch 450 is released and the face plate 421a of the sub-face material 420 is moved to the open position, the room can be ventilated via the ventilation unit 40.

[0037] Moreover, according to the above-mentioned fitting, the heat-foaming material C2 is provided on all four sides between the sub-frame body 410 and the secondary surface material 420. Therefore, if the fitting is exposed to high temperatures in the event of a fire or the like, the heat-foaming material C2 will expand, sealing off the four sides between the sub-frame body 410 and the secondary surface material 420. As a result, there is no risk of a through hole penetrating the inside and outside of the room being formed in the ventilation unit 40, even if the fitting is exposed to high temperatures.

[0038] Furthermore, when the building materials are exposed to high temperatures, the heated foaming material C1 provided in the storage sections 33a, 34a of the vertical frames 33, 34 and the heated foaming material C3 provided in the vertical frame base 413a of the sub-vertical frame 413 expand, thereby ensuring that the portions of the storage sections 33a, 34a of the vertical frames 33, 34 that face the sub-vertical frame 413 are securely blocked.

[0039] Therefore, if the double-glazing glass 35 is exposed to high temperatures and flammable gas is generated from the spacer member S, for example, and the gap between the housing portions 33a, 34a of the vertical frames 33, 34 and the double-glazing glass 35 is not completely sealed, the flammable gas generated from the double-glazing glass 35 will not reach the gap between the vertical frames 33, 34 and the sub-vertical frame 413. In addition, in the above-mentioned fitting, the heated foam material C3 is also disposed in the lower frame base 412a of the sub-bottom frame 412, so that when exposed to high temperatures, the sub-frame housing portion 412d is also sealed, reliably preventing the flammable gas from the double-glazing glass 35 from reaching the gap between the vertical frames 33, 34 and the sub-vertical frame 413. This prevents flammable gas from being emitted from the ventilation unit 40 and eliminates the risk of flames breaking out on the non-heated surface opposite the heated surface.

[0040] While the above-described embodiment exemplifies a sliding window as a fixture, it can also be applied to a casement window, in which the shoji screen opens and closes outward from the frame, or a fixed window, in which the shoji screen and face plate are fixed to the building material. Furthermore, while the secondary shoji screen is exemplified as a ventilation unit in which the secondary face plate is arranged to be openable and closable relative to the subframe, this is not necessarily limited to this, and other types of screens may be used as long as they are arranged between two building materials. In this case, the secondary face plate 420 is not necessarily arranged between building materials arranged vertically, but may also be arranged between building materials arranged horizontally. Furthermore, the secondary face plate 420 is exemplified as being formed by attaching side panels 422 to both ends of a face plate base 421, but this is not necessarily limited to this, and double-glazed glass or other types may also be used. Furthermore, while the face plate 35 is exemplified as a double-glazed glass, this is not necessarily limited to this, and it is also possible to use a non-transparent panel as the face plate.

[0041] In addition, in the above-described embodiment, the heat-expandable material C1 is disposed in the storage section 33a, 34a of the vertical frame 33, 34 along the entire length, which is preferable in terms of fire resistance, but the present invention is not necessarily limited to this, and it is sufficient if the heat-expandable member is disposed only in the section of the storage section of the building material that faces the secondary building material. In this case, since the heat-expandable member is provided in the secondary building material in the above-described embodiment, it is possible to use the same building material for both inner shoji screens that have secondary shoji screens and inner shoji screens that do not have secondary shoji screens. However, the heat-expandable member may also be attached to the building material.

[0042] As described above, the fittings of the present invention are characterized in that a surface material and a secondary shoji screen are placed between two building materials, the surface material is placed between the two building materials with both edge portions accommodated in storage sections provided in the opposing parts of the two building materials, the secondary shoji screen has secondary building materials on both sides and is placed between the two building materials with the secondary building materials engaged with each of the building materials, and a thermally expandable member is arranged in the storage section where the building material and the secondary building material face each other. According to this invention, when the fitting is exposed to high temperatures, the expansion of the thermally expandable member closes the storage space between the building material and the secondary building material. Therefore, even if flammable gas is generated from the surface material, this flammable gas will not reach the secondary screen, eliminating the risk of it catching fire on the unheated side of the secondary screen.

[0043] Furthermore, the present invention is characterized in that in the above-mentioned fitting, the thermally expandable member is attached to the secondary building material. According to this invention, there is no need to install a thermal expansion member in the building material, so the building materials for fittings with secondary shoji screens can be made the same as those for fittings without secondary shoji screens.

[0044] Furthermore, the present invention is characterized in that, in the above-mentioned fittings, the secondary shoji screen comprises a secondary frame body made of the secondary building material and a secondary surface material supported on the sub-frame body in a state in which the opening of the sub-frame body is opened and closed, and a secondary thermal expansion member is arranged around the entire periphery between the sub-frame body and the secondary surface material. According to this invention, when the building fixture is exposed to high temperatures, the secondary thermal expansion member in the secondary shoji screen expands, sealing the gap between the secondary frame body and the secondary panel, thereby preventing the secondary shoji screen from becoming a penetration point for flames.

[0045] The present invention is also characterized in that, in the above-mentioned building fixture, the secondary surface material protrudes toward the inside of the room to open the secondary frame body, at least a portion of the secondary thermal expansion member is attached to the secondary surface material, and the secondary thermal expansion member attached to the secondary surface material is covered by a pressing member provided on the secondary surface material. According to this invention, the secondary thermal expansion member is covered by the pressing member, so there is no risk of the secondary thermal expansion member accidentally falling off. [Explanation of symbols]

[0046] 30 inner shoji screen, 33, 34 vertical frame, 33a, 34a storage section, 35 double glazing, 40 ventilation unit, 410 sub-frame body, 413 sub-vertical frame, 420 sub-surface material, 460 holding member, C2 heat foam material, C3 heat foam material

Claims

1. A frame body and a shoji screen disposed on the frame body, The shoji screen is provided with a surface material and a ventilation unit inside a four-sided building material, The ventilation unit includes a sub-frame body and a sub-surface material supported in an openable and closable manner inside the sub-frame body via a sub-bottom frame constituting the sub-frame body, a latch is provided between the sub-upper frame and the sub-surface member that constitutes the sub-frame body, for maintaining the sub-surface member in a closed position; The sub-vertical frame, the sub-upper frame, and the sub-lower frame that constitute the sub-frame body each have an inner fin portion that faces the interior of the room toward the inner periphery, and an inner seal member is attached to the inner fin portion on the surface facing the interior of the room. The sub-upper frame and the sub-vertical frame each have an outer fin portion toward the inner periphery at a portion that faces the exterior of the room, and an outer seal member is attached to the outer fin portion. The auxiliary surface material has a face plate portion that contacts the inner seal member from the indoor side when the auxiliary surface material is disposed in the closed position, and a square tube portion that is provided on a visible surface of the face plate portion facing the outdoor side and contacts the outer seal member, and a lower edge portion of the face plate portion is rotatably supported by the auxiliary lower frame, The inner fin portion of the secondary lower frame has a portion that is located on the inner circumferential side of the rotation support portion of the secondary face material, and the inner seal member is attached to the inner circumferential side portion, A building fixture characterized in that a thermal expansion member is provided between the sub-frame body and the sub-surface material in a portion that is closer to the outdoor space than the inner sealing member.

2. The building fixture described in Claim 1, characterized in that the secondary surface material has screw holes provided in the square tube portion.

3. The building fixture described in Claim 1, characterized in that the sub-bottom frame is provided with a sub-frame accommodating portion that accommodates the upper edge portion of the face material, and a thermal expansion member is provided in the sub-frame accommodating portion.

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