Fittings

Abstract

To improve fireproof performance by increasing strength of a fitting in which a sill arranged on the inner periphery of a building opening is formed in a flat shape.SOLUTION: A fitting includes a frame material made of aluminum, and a sash that is supported by the frame material. A sill of the frame material has an outer rail, an inner rail, and a hollow aluminum between-rails attachment that is arranged with a short sill guide made of resin between the inner and outer rails. A top surface is formed as an almost the same surface. In the between-rails attachment, an outdoor side surface and an undersurface are provided with heating cellular porous media, respectively.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a fitting to be installed in an opening in a building structure. [Background technology]

[0002] 2. Description of the Related Art Conventionally, for example, fittings have been known that have a frame body formed by assembling frame materials such as aluminum stiles on all four sides, and the upper surface of the lower frame is formed flat. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-48558 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there has been a demand for improved fire resistance even in fittings having a flat sill as described in Patent Document 1 above. The present invention aims to improve the fire resistance of building materials having a flat upper surface of the sill. [Means for solving the problem]

[0005] The fitting of the embodiment comprises an aluminum frame material and a shoji screen supported by the frame material. The bottom frame of the frame material has an outer rail, an inner rail, and an aluminum hollow rail attachment arranged between the outer rail and the inner rail with a short resin bottom frame guide sandwiched therebetween. The upper surface is formed to be substantially flush with the surface of the rail attachment. The outer surface and the lower surface of the rail attachment are provided with a heated foaming material along the entire length in the longitudinal direction. The heated foam material is inserted between the lower frame guide and the rail attachment, and is spaced apart from the lower frame over the entire length in the longitudinal direction. It is a fixture that is used. Effect of the Invention

[0006] According to the fittings of this embodiment, fire resistance can be improved compared to fittings with flat sills that are placed on the inner periphery of a building opening. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is an external view of a fixture according to one embodiment. [Diagram 2] FIG. 2 is a vertical cross-sectional view of a fitting according to one embodiment. [Diagram 3] FIG. 2 is a cross-sectional view of a fitting according to one embodiment. [Figure 4] These are vertical cross-sectional views of the bottom frame of a fixture for one embodiment, where (a) is a vertical cross-sectional view of the side where the outer shoji screen is located when the shoji screen is closed, and (b) is a vertical cross-sectional view of the side where the inner shoji screen is located when the shoji screen is closed. [Diagram 5] 13A and 13B are vertical cross-sectional views of the bottom frame of a fixture according to another embodiment, where (a) and (b) are vertical cross-sectional views of the side where the outer screen is located when the screen is closed. [Figure 6] FIG. 2 is a perspective view of the lower portion of the fitting according to one embodiment. [Figure 7] 1A and 1B are perspective views of a rail-to-rail attachment for a fixture according to one embodiment, where (a) is a view of the rail-to-rail attachment with end caps attached, and (b) is a view of the end caps. [Figure 8] 1A is a diagram of the lower frame of a fitting according to one embodiment, where (a) is a partially enlarged vertical cross-sectional view of the lower frame, (b) is a front view of a spacer, and (c) is a side view of the spacer. [Figure 9] FIG. 1 is a diagram of the bottom frame of a fixture for one embodiment, where (a) is a partially enlarged vertical cross-sectional view of the bottom frame, (b) and (d) are front views of the connecting fittings, and (c) and (e) are side views of the connecting fittings. [Figure 10] 1A is a front view of the connecting fittings, FIG. 1B is a side view of the connecting fittings, and FIG. 1C is an enlarged vertical cross-sectional view of a portion of the lower frame. [Figure 11] 1A is a front view of the connecting fittings, FIG. 1B is a side view of the connecting fittings, and FIG. 1C is an enlarged vertical cross-sectional view of a portion of the lower frame. [Figure 12]These are vertical cross-sectional views of the lower frame part of a fixture that connects the indoor component and the outdoor component with a resin insulating bridge, where (a) is a vertical cross-sectional view under normal conditions and (b) is a vertical cross-sectional view during a fire. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] One embodiment of the fixture will be described with reference to the drawings, using as an example a sliding window in which inner and outer screens are supported on the inner periphery of a frame so that they can be slid freely apart.

[0009] (Overall composition) As shown in Figure 1, the fittings of this embodiment are formed by assembling an upper frame 11, a lower frame 12, and left and right vertical frames 13, 14 around the inner periphery of a frame body 1, and by assembling upper frames 21, 31, lower frames 22, 32, and left and right vertical frames 23, 24, 33, 34 around the inner periphery, and fitting panel bodies 25, 35 around the inner periphery, the inner and outer shutters 2, 3 are supported so that they can be slid freely between each other.

[0010] (Frame) As shown in Figure 2, the upper frame 11 that constitutes the frame body 1 has an aluminum interior upper frame 111 that is arranged on the interior inner periphery of the building opening A, an aluminum exterior upper frame 112 that is arranged on the exterior side of the interior upper frame 111, and a resin bridge member 113 that connects the interior upper frame 111 and the exterior upper frame 112.

[0011] The indoor side upper frame 111 has a concealed wall 111a facing the inner surface of the building opening A, an indoor side visible wall 111b connected to the indoor side end of the concealed wall 111a, and an upper inner rail 111c extending downward from the outdoor side inner surface of the concealed wall 111a.

[0012] An indoor side resin upper frame 114 is arranged from the lower end of the upper inner rail 111c of the indoor side upper frame 111 to the lower end of the indoor side visible wall 111b, and the indoor side upper frame 111 and the indoor side resin upper frame 114 are fixed to the inner wall of the building opening A by fixing means b11 such as screws.

[0013] The indoor side resin upper frame 114 has an angle portion 114b that extends further downward from the lower end of the indoor side visible wall 111b of the indoor side upper frame 111 and then bends and extends toward the inside of the room, and the angle portion 114b is fixed to the frame member B that is placed in the building opening A by fixing means b12 such as screws.

[0014] The exterior upper frame 112 has a concealed wall 112a, an exterior visible wall 112b connected to the exterior end of the concealed wall 112a, an upper exterior rail 112c extending downward from the exterior lower surface of the concealed wall 112a, and an attachment piece 112d extending outer circumferentially from the outer circumferential surface of the concealed wall 112a, and the attachment piece 112d is fixed to the exterior surface of the building opening A by a fixing means b13 such as a screw.

[0015] A windstop member is provided on the underside of the joint of the upper frame 11, and a resin cover 115 is arranged on the underside between the windstop member and the left vertical frame 13, from the upper inner rail 111c to the upper outer rail 112c.

[0016] As shown in Figure 2, the lower frame 12 that constitutes the frame body 1 has an aluminum inner lower frame 121 that is arranged on the inner side of the building opening A, an aluminum outer lower frame 122 that is arranged on the outer side of the inner lower frame 121, and a resin insulating bridge 123 that connects the inner lower frame 121 and the outer lower frame 122.

[0017] The indoor side lower frame 121 has a hollow indoor side lower frame main body 121a installed on the inner surface of the building opening A, an indoor side visible wall 121b extending upward from the indoor side of the indoor side lower frame main body 121a, an angle portion 121c formed by bending the upper end of the indoor side visible wall 121b toward the indoor side, a lower inner rail 121d extending upward from the outdoor side of the indoor side lower frame main body 121a, and an attachment piece 121e extending from the indoor side of the indoor side lower frame main body 121a toward the room, and a bridge holding portion 121g that holds an insulating bridge 123 is provided on the outdoor side surface of the indoor side lower frame main body 121a.

[0018] The indoor side lower frame 121 has an attachment piece 121e fixed to the inner surface of the building opening A by a fixing means b21 such as a screw, and the angle portion 121c fixed to a frame member B placed in the building opening A by a fixing means b22 such as a screw.

[0019] The exterior lower frame 122 has a hollow exterior lower frame main body 122a, an exterior bottom wall 122b extending from the exterior side of the exterior lower frame main body 122a in the outdoor direction, an exterior visible wall 122c extending upward from the exterior end of the exterior bottom wall 122b, a lower outer rail 122d extending upward from the inner surface of the exterior lower frame main body 122a, and a mounting piece 122e extending downward from the interior side of the exterior lower frame main body 122a, and the mounting piece 122e is fixed to the exterior side of the building opening A by a fixing means b23 such as a screw.

[0020] As shown in Figure 3, the left vertical frame 13 that constitutes the frame body 1 has a concealed wall 13a fixed to the building opening A, an indoor concealed wall 13b extending in the concealed direction from the indoor end of the concealed wall 13a, an outdoor concealed wall 13c extending in the concealed direction from the outdoor end of the concealed wall 13a, a central concealed wall 13d extending inwardly from near the center in the concealed direction of the concealed wall 13a, a pull-in wall 13e extending inwardly from the outdoor inner peripheral surface of the concealed wall 13a, and an attachment piece 13f extending in the outer peripheral direction from the indoor-side outer peripheral surface of the concealed wall 13a.

[0021] The left vertical frame 13 has an attachment piece 13f fixed to the exterior surface of the building opening A by fixing means b32 such as a screw, and a plastic left vertical frame 132 is disposed on the inner periphery between the interior visible wall 13b and the central visible wall 13d, and the visible wall 13a of the left vertical frame 13 and the plastic left vertical frame 132 are fixed to the inner periphery of the building opening A by fixing means b31 such as a screw. The plastic left vertical frame 132 also has an angle portion 132a, and the angle portion 132a is fixed to the frame member B by fixing means b33 such as a screw.

[0022] As shown in Figure 3, the right vertical frame 14 that constitutes the frame body 1 has a concealed wall 14a fixed to the building opening A, an indoor side concealed wall 14b extending in the concealed direction from the indoor side end of the concealed wall 14a, an outdoor side concealed wall 14c extending in the concealed direction from the outdoor side end of the concealed wall 14a, a central concealed wall 14d extending inwardly from near the center in the concealed direction of the concealed wall 14a, a pull-in wall 14e extending inwardly from the indoor side inner peripheral surface of the concealed wall 14a, and an attachment piece 14f extending in the outer peripheral direction from the indoor side outer peripheral surface of the concealed wall 14a.

[0023] The right vertical frame 14 has the mounting piece 14f fixed to the exterior surface of the building opening A by fixing means b42 such as screws, and the resin right vertical frame 142 is disposed on the inner periphery between the interior visible wall 14b and the pull-in wall 14e, and the visible wall 14a of the right vertical frame 14 and the resin right vertical frame 142 are fixed to the inner periphery of the building opening A by fixing means b41 such as screws. The resin right vertical frame 142 also has an angle portion 142a, which is fixed to the frame member B by fixing means b43 such as screws.

[0024] (Shoji screen) As shown in Figures 2 and 3, the inner shoji 2 and the outer shoji 3 have similar upper and lower frames and door end frames, so here we will mainly use the inner shoji 2 to explain the inner and outer shoji, and explain the outer shoji 3 in terms of its different structure from the inner shoji 2.

[0025] As shown in FIG. 2, the upper frame 21 that constitutes the inner screen 2 has a metal upper frame 211 made of aluminum and a resin upper frame 212 made of resin. The metal upper frame 211 has a frame main body 211a with a hollow portion, an exterior glass front wall 211b extending from the exterior side of the frame main body 211a in an inward direction, and a rail guide portion 211c continuing to the outer periphery of the frame main body 211a.

[0026] The plastic upper frame 212 is attached to the indoor side of the metal upper frame 211 and has a plastic upper frame main body 212a which covers the indoor side of the upper frame main body portion 211a and the rail guide portion 211c, and an indoor side glass front wall 212b which continues in the inner circumferential direction of the plastic upper frame main body 212a.

[0027] The upper frame 21 has a glass opening formed by the exterior glass opening wall 211b of the metal upper frame 211 and the interior glass opening wall 212b of the resin upper frame 212, and glass opening reinforcement material is placed within the glass opening to prevent the glass from coming loose (falling off), and the panel body 25 is held via a grating channel.

[0028] As shown in FIG. 2, the bottom frame 22 constituting the inner screen 2 has a metal bottom frame 221 made of aluminum and a resin bottom frame 222 made of resin. The metal bottom frame 221 has a bottom frame main body 221a having multiple hollow portions, an exterior glass frontage wall 221b extending inward from the exterior side of the bottom frame main body 221a, and a hanging piece 221c extending downward from the exterior side of the bottom frame main body 221a, and a wheel 92 is arranged from the hollow portion below the bottom frame main body 221a to the interior side of the hanging piece 221c.

[0029] The resin bottom frame 222 is attached to the indoor side of the metal bottom frame 221 and has a resin bottom frame main body 222a which has multiple hollow portions and covers the indoor side of the bottom frame main body portion 221a, and an indoor side glass front wall 222b which continues in the inner circumferential direction of the resin bottom frame main body 222a.

[0030] The bottom frame 22 has a glass opening formed by the exterior glass opening wall 221b of the metal bottom frame 221 and the interior glass opening wall 222b of the resin bottom frame 222, with glass opening reinforcement material placed within the glass opening and the panel body 25 held via a grating channel.

[0031] The left vertical frame (joint frame) 23 that constitutes the inner shoji 2 has a metal left vertical frame 231 made of aluminum and a resin left vertical frame 232 made of resin, as shown in FIG. The metal left vertical frame 231 has a left vertical frame main body 231a with two hollow portions lined up in the forward direction, an indoor side glass front wall 231b extending inwardly from the indoor side inner circumferential surface of the left vertical frame main body 231a, and an outdoor side glass front wall 231c extending inwardly from the outdoor side inner circumferential surface of the left vertical frame main body 231a.

[0032] A U-shaped steel reinforcing member is arranged in the hollow portion on the outside of the left vertical frame main body 231a and in the hollow portion on the inside of the room, and the two reinforcing members are connected via a partition wall that separates the hollow portion on the outside of the room from the hollow portion on the inside of the room.

[0033] The resin left vertical frame 232 is attached to the outer periphery and indoor side of the metal left vertical frame 231, and has a visible wall portion 232a and an inner periphery wall portion 232c which cover the indoor side (including the inner periphery) of the left vertical frame main body portion 231a and the indoor side of the indoor side glass front wall 231b, and a visible wall portion 232b which covers the outer periphery side of the left vertical frame main body portion 231a.

[0034] The left vertical frame 23 has a glass opening formed by the exterior glass opening wall 231c and the interior glass opening wall 231b of the metal left vertical frame 231, with glass opening reinforcement material placed within the glass opening and the panel body 25 held via a grating channel.

[0035] The right vertical frame (door end frame) 24 that constitutes the inner shoji screen 2 has a metal right vertical frame 241 made of aluminum and a resin right vertical frame 242 made of resin, as shown in FIG. The metal right stile 241 has a right stile main body 241a with a hollow portion, an exterior glass frontage wall 241b extending from the exterior side of the right stile main body 241a inward, and a door-end groove portion 241c continuing to the outer periphery of the right stile main body 241a.

[0036] The resin right vertical frame 242 is attached to the indoor side of the metal right vertical frame 241, and has a resin right vertical frame main body 242a that covers the indoor side of the right vertical frame main body portion 241a and the door end gutter portion 241c, and an indoor side glass frontage wall 242b that continues in the inner circumferential direction of the resin right vertical frame main body 242a.

[0037] The right vertical frame 24 has a glass opening formed by the exterior glass opening wall 241b of the metal right vertical frame 241 and the interior glass opening wall 242b of the resin right vertical frame 242, with glass opening reinforcement material placed within the glass opening and the panel body 25 held via a grating channel.

[0038] As shown in Fig. 3, the right vertical frame (joint frame) 34 constituting the outer shoji 3 has a right vertical frame main body 341a made of aluminum with a hollow section, and a glass opening that continues to the inner circumference side of the right vertical frame main body 341a. Note that the upper and lower frames 31, 32 and the left vertical frame (door end frame) 33 constituting the outer shoji 3 have the same structure as the inner shoji 2, so their explanation will be omitted here.

[0039] The basic configuration of the sliding window of this embodiment has been explained above. The sliding window of this embodiment has a flat upper surface of the lower frame to facilitate smooth entry and exit, while also improving the fire resistance of the lower frame with its flat upper surface. The bottom frame of the building fixture of this embodiment will be described in detail below.

[0040] -Bottom frame configuration- The sill 12 of the fitting of the present embodiment is formed by connecting an indoor side sill 121 and an outdoor side sill 122 by a heat insulating bridge 123, as shown in Figs. 4(a) and (b).

[0041] The lower frame 12 has a resin cap member 124 arranged between the indoor side visible wall 121b and the lower inner rail 121d of the indoor side lower frame 121, an aluminum rail-to-rail attachment 125 arranged between the lower inner rail 121d of the indoor side lower frame 121 and the lower outer rail 122d of the outdoor side lower frame 122, and an aluminum lower frame cover member 126 arranged between the lower outer rail 122d and the outdoor side visible wall 122c, so that the upper surface is formed to be approximately flush, i.e., flat.

[0042] The bottom frame 12 has a guide groove 12a formed between the lower inner rail 121d and the rail-to-rail attachment 125, through which the hanging piece 221c of the bottom frame 22 of the inner screen 2 is guided, and a guide groove 12b formed between the lower outer rail 122d and the bottom frame cover member 126, through which the hanging piece of the bottom frame 32 of the outer screen 3 is guided. This stabilizes the movement of the inner and outer screens 2, 3, and by placing airtight material in the guide grooves 12a, 12b, an airtight line is formed between the inner and outer screens 2, 3 and the bottom frame 12.

[0043] In addition, on the outer screen 3 side (the side where the outer screen 3 is located when the screen is closed) shown in Figure 4(a), heated foaming material f is arranged on the exterior side of the lower outer rail 122d and on the bottom near the lower end of the outer lower rail 122d, and on the inner screen 2 side (the side where the inner screen 2 is located when the screen is closed) shown in Figure 4(b), heated foaming material f is arranged on the exterior side of the lower inner rail 121d, which fills the guide grooves 12a, 12b in the event of a fire, thereby preventing the occurrence of gaps connecting the interior and exterior of the room between the bottom frame 12 and the inner and outer screens 2, 3.

[0044] -Rail attachment- The rail-to-rail attachment 125 arranged on the upper surface of the lower frame 12 is a long member having a generally rectangular hollow cross-section, i.e., a hollow cross-section, and as shown in Figure 6, the rail-to-rail attachment 125 arranged on the outer screen 3 side of the lower frame 12 and the rail-to-rail attachment 125 arranged on the inner screen 2 side are arranged with a plastic water-stopping piece 71 in between, and plastic end caps 72 are attached to the ends of both rail-to-rail attachments 125, 125 opposite the side where the water-stopping piece 71 is provided, i.e., the ends on the left and right vertical frames 13, 14 sides.

[0045] As shown in Figures 4 and 7(a), short, resinous lower frame guides 73 are attached to multiple positions on the underside of the rail-to-rail attachment 125, and the rail-to-rail attachment 125 is positioned at a predetermined distance from the outdoor lower frame 122 by sandwiching the lower frame guides 73 between it and the outdoor lower frame 122.

[0046] As shown in Figure 8(a), the rail-to-rail attachment 125 has a hollow main body portion 125a with a flat upper surface, legs 125b extending downward from a lower part of the exterior side of the main body portion 125a, and a mounting portion 125c extending from the interior side of the main body portion 125a toward the interior of the room, and an airtight material retaining groove 125d is formed in the upper part of the interior side of the main body portion 125a. In addition, an airtight material retaining groove 121f is formed on the exterior side surface of the lower inner rail 121d of the interior side lower frame 121 so as to face the airtight material retaining groove 125d of the rail-to-rail attachment 125.

[0047] The rail-to-rail attachment 125 has heated foaming materials f1, f2 provided on the exterior side and underside of the main body 125a over almost the entire length of the rail-to-rail attachment 125, and heated foaming material f3 provided on the water-stopping piece side within the hollow portion of the main body 125a. The heated foaming materials f1, f2 provided on the exterior side and the underside of the main body 125a of the rail-to-rail attachment 125 do not necessarily have to be provided over the entire length of the rail-to-rail attachment 125.

[0048] In addition, the end cap 72 attached to the frame side end of both rail-to-rail attachments 125 has an attachment portion 72a that is inserted into the hollow portion of the rail-to-rail attachment 125, and a cap portion 72b that covers the end of the rail-to-rail attachment 125, as shown in Figure 7(b), and a heated foaming material f4 is arranged on the projecting surface of the cap portion 72b.

[0049] As described above, in the fitting of this embodiment, the rail-to-rail attachment 125 for flattening the upper surface of the bottom frame 12 is formed separately from the bottom frame 12 and is arranged via a short, resin bottom frame guide 73, thereby preventing metal-to-metal contact between the rail-to-rail attachment 125 and the exterior-side bottom frame 122 of the bottom frame 12, and preventing the rail-to-rail attachment 125 from wobbling. This makes it less likely that the rails, etc. will be damaged when the rail-to-rail attachment 125 is attached or detached during cleaning, and also makes it easier to attach and detach the rail-to-rail attachment 125.

[0050] In addition, since the lower frame guide 73 is short, it ensures a drainage path in the lower frame 12 and reduces the amount of flammable materials used, thereby suppressing the spread of fire in the event of a fire. In addition, since the heated foaming materials f1, f2 provided on the exterior side and underside of the rail-to-rail attachment 125 are provided in the space formed by the lower frame guide 73, it is possible to prevent the heated foaming materials from coming into contact with water passing over the upper surface of the lower frame 12 and getting wet.

[0051] In the event of a fire, the heated foaming materials f1 and f2 foam, thereby blocking the gap between the rail-to-rail attachment 125 and the lower frame 12, which is formed by the lower frame guide 73. In addition, because the heated foaming material f3 is provided on the water stop piece side in the hollow part of the rail-to-rail attachment 125, even if the resin water stop piece 71 melts in the event of a fire, communication between the inside and outside of the room at the bottom of the joint part of the lower frame 12 is suppressed, and the intrusion of smoke, gas, and the like into the room through the hollow part of the rail-to-rail attachment 125 is suppressed.

[0052] In addition, in the building fixture of this embodiment, a heated foaming material f4 is provided on the projecting surface of the end caps 72 attached to the ends of the left and right vertical frames of the inter-rail attachment 125. Therefore, even if the plastic end caps 72 melt in the event of a fire, communication in the indoor / outdoor directions between the left and right vertical frames 13, 14 and the ends of the inter-rail attachments 125, 125 is prevented. In addition, the heated foaming material f4 foams and enters the hollow portion of the inter-rail attachment 125 in place of the melted end caps 72, thereby preventing smoke, gas, etc. from entering the room through the hollow portion of the inter-rail attachment 125.

[0053] -Outdoor hollow part- The lower frame cover member 126, which is arranged on the upper surface of the lower frame 12, has, as shown in Figure 4(a), an indoor side visible wall 126a, an upper wall 126b formed by the upper end of the indoor side visible wall 126a extending to the outside of the room, a locking piece 126c formed on the outdoor side of the upper wall 126b, and a hanging portion 126d extending downward from the underside of the upper wall 126b.

[0054] The lower frame cover member 126 is attached to the exterior lower frame 122 with the lower end of the interior visible wall 126a abutting against the upper surface of the exterior bottom wall 122b of the exterior lower frame 122 and the locking piece 126c engaged with the upper end of the exterior visible wall 122c of the lower frame 12, and an exterior hollow portion 12c is formed on the exterior side of the lower frame 12 by the exterior lower frame 122 and the lower frame cover member 126.

[0055] As shown in Figures 2, 3, and 6, the exterior hollow portion 12c protrudes outside the room further than the left and right vertical frames 13, 14 in the forward direction, and resin lower frame end caps 76, 76 are attached to both ends of the exterior hollow portion 12c.

[0056] As shown in Figure 4(a), within the outdoor side hollow portion 12c of the lower frame 12, a lower frame cover reinforcement material 81 is arranged, which has a projection portion 81b facing the upper wall of the outdoor side hollow portion 12c (the upper wall 126b portion of the lower frame cover member 126) and a projection portion 81a facing the indoor side wall of the outdoor side hollow portion 12c (the indoor side projection wall 126a portion of the lower frame cover member 126).

[0057] The lower frame cover reinforcement 81 is made of a metal material such as steel, and is fixed by screws to the indoor side indoor wall 126a of the lower frame cover member 126 with the projection portion 81b abutting the underside of the upper wall 126b of the lower frame cover member 126, and the projection portion 81a is positioned so as to cover at least the indoor side wall of the outdoor hollow portion 12c from the outside of the room. The lower frame cover reinforcement material 81 has a heating foaming material f arranged on the outdoor side surface of the facing portion 81a, which foams in the event of a fire.

[0058] In addition, within the outdoor hollow portion 12c of the bottom frame 12, a bottom frame reinforcement member 82 having an approximately L-shaped cross section is arranged, the bottom frame reinforcement member 82 having a projection portion 82a facing the bottom wall of the outdoor hollow portion 12c (the outdoor bottom wall 122b portion of the outdoor bottom frame 122) and a projection portion 82b facing the outdoor wall of the outdoor hollow portion 12c (the outdoor projection wall 122c portion of the outdoor bottom frame 122).

[0059] The lower frame reinforcement 82 is made of a metal material such as steel, and the projection 82a is fixed to the exterior bottom wall 122b with screws. A heating foaming material f that foams in the event of a fire is disposed on the indoor side of the outdoor exterior wall 122c of the outdoor lower frame 122.

[0060] As described above, the building fixture of this embodiment can improve the strength of the exterior hollow portion 12c by providing a sill cover reinforcement material 81 having a facing portion 81a that faces the interior wall of the exterior hollow portion 12c of the sill 12. Furthermore, since the lower frame cover reinforcement material 81 has a projection portion 81b facing the upper wall of the outdoor hollow portion 12c, the strength of the outdoor hollow portion 12c can be further improved.Even when the upper surface of the outdoor hollow portion 12c protrudes outside the room beyond the left and right vertical frames 13, 14 and is in a cantilevered state, a lower frame can be formed whose upper surface is horizontal and approximately flush (flat).

[0061] Furthermore, a heated foaming material f that foams in the event of a fire is arranged on the outdoor side surface of the visible portion 81a of the lower frame cover reinforcement material 81, which is arranged to cover at least the indoor side wall of the outdoor side hollow portion 12c from the outside of the room.By foaming toward the outdoor side hollow portion 12c in the event of a fire, the indoor side wall of the outdoor side hollow portion 12c can be protected and fire resistance can be improved.

[0062] In addition, the building fixture of this embodiment has a lower frame reinforcement material 82 having a projection portion 82a and a projection portion 82b that face the outdoor bottom wall 122b and outdoor visible wall 122c of the lower frame 12 provided within the outdoor exterior hollow portion 12c of the lower frame 12, thereby further improving the strength of the outdoor exterior hollow portion 12c and protecting the indoor interior wall of the outdoor exterior hollow portion 12c from flames from below, thereby improving fire resistance.

[0063] Furthermore, since heated foaming material f is provided on the indoor side of the outdoor side visible wall 122c, in the event of a fire it foams between the outdoor side wall of the outdoor side hollow portion 12c and the visible portion 82b of the sill reinforcement material 82, protecting the outdoor side of the outdoor side hollow portion 12c, thereby further improving fire resistance.

[0064] In addition, the reinforcing material to be placed in the outdoor hollow portion 12c of the lower frame 12 may be only either the lower frame cover reinforcing material 81 or the lower frame reinforcing material 82. For example, as shown in Figure 5(a), only the lower frame cover reinforcement material 81 may be placed in the outdoor hollow portion 12c of the lower frame 12, and a heated foaming material f may be placed on the outdoor side of the visible portion 81a of the lower frame cover reinforcement material 81 and / or the indoor side of the outdoor visible wall 122c of the lower frame 12.

[0065] In the event of a fire, the heated foaming material f arranged on the exterior side of the visible portion 81a of the lower frame cover reinforcement material 81 and / or the interior side of the exterior visible wall 122c of the lower frame 12 will foam toward the exterior hollow portion 12c of the lower frame 12, in this embodiment, between the exterior wall of the exterior hollow portion 12c and the visible portion 81a of the lower frame cover reinforcement material 81, thereby protecting the exterior hollow portion 12c and improving fire resistance.

[0066] Also, as shown in Figure 5 (b), only the lower frame reinforcement material 82 may be placed in the outdoor hollow portion 12c of the lower frame 12, and a heated foaming material f may be placed on at least one of the outdoor side and indoor side surfaces of the visible portion 82b of the lower frame reinforcement material 82.

[0067] In the event of a fire, the heated foaming material provided on the indoor side of the visible portion 82b of the lower frame reinforcement 82 foams inside the outdoor hollow portion 12c of the lower frame 12, thereby protecting the indoor wall of the outdoor hollow portion 12c and improving fire resistance. Also, when the outdoor side of the lower frame 12 is heated by flames, the heated foaming material provided on the outdoor side of the visible portion 82b of the lower frame reinforcement 82 foams immediately and covers the outdoor side of the reinforcement, prolonging the maintenance of the outdoor hollow portion 12c by the reinforcement and suppressing melting of the lower outer rail 122d, thereby further improving fire resistance.

[0068] When a lower frame reinforcement material 82 is provided in addition to the lower frame cover reinforcement material 81, the heat-foaming material f arranged on the visible portion 81a of the lower frame cover reinforcement material 81 may be omitted, as shown in Figure 4 (b). Even when a lower frame reinforcement material 82 is provided in addition to the lower frame cover reinforcement material 81, a heat-foaming material may be provided on both the exterior side and the interior side of the visible portion 82b of the lower frame reinforcement material 82.

[0069] Furthermore, when placing the heated foaming material, the outdoor hollow portion 12c of the lower frame 12 is formed by a lower frame cover member 126 that is separate from the outdoor lower frame 122 of the lower frame 12, so that the heated foaming material can be easily placed within the outdoor hollow portion 12c, making it easy to install.

[0070] -Connecting fittings- As shown in Figures 4 and 8(a), the lower frame 12 is between the lower inner rail 121d of the indoor side lower frame 121 and the lower outer rail 122d of the outdoor side lower frame 122, and multiple resin spacers 74 are arranged on the indoor side of the inter-rail attachment 125.

[0071] As shown in Figures 8(b) and (c), the spacer 74 has a block shape with a mounting surface 74b located at an upper position on the outside of the room, and is positioned with its lower surface 74a placed on the upper surface of the bridge retaining portion 121g of the indoor side lower frame 121. The mounting surface 74b supports the mounting portion 125c of the rail-to-rail attachment 125, thereby preventing the rail-to-rail attachment 125 from falling over and enabling the attachment to be stably attached so that the upper surface of the lower frame 12 is horizontal.

[0072] In addition, as shown in Figure 9(a), at a position where there is no bottom frame guide 73 in the left-right direction, when the screen is closed, the connecting fittings 75 connecting the outside bottom frame 122 and the inside bottom frame 121 are connected across the insulating bridge 123 at the wheel position or near the wheel position of the inner and outer screens 2, 3 (hereinafter referred to as ``near the wheel position'').

[0073] The connecting fitting 75 is a short member made of a metal material such as aluminum, and has a flat exterior fixing portion 75a fixed to the upper surface of the exterior lower frame main body portion 122a of the exterior lower frame 122, and a block-shaped interior fixing portion 75b fixed to the interior lower frame main body portion 121a of the interior lower frame 121, as shown in Figures 9(b) and (c).

[0074] The connecting fitting 75 has two through holes 75c, 75c that penetrate in the vertical direction z1 formed side by side in the longitudinal direction of the connecting fitting 75 in the outdoor fixing part 75a, and two through holes 75d, 75d that penetrate diagonally downward in the z2 direction from above from the outdoor side to the indoor side when fixed to the bottom frame 12.

[0075] On the other hand, the exterior lower frame 122 has a screw hole threaded in the vertical direction z1 from above in the upper wall of the exterior lower frame main body 122a to which the connecting bracket 75 is fixed, and the interior lower frame 121 has a screw hole threaded in the diagonally downward direction z2 in the exterior visible wall of the interior lower frame main body 121a to which the connecting bracket 75 is fixed.

[0076] The connecting bracket 75 is then positioned between the indoor side lower frame 121 and the outdoor side lower frame 122, spanning the insulating bridge 123, and then the outdoor side fixing part 75a is screwed to the outdoor side lower frame 122 and the indoor side fixing part 75b is screwed to the indoor side lower frame 121, thereby connecting the indoor side lower frame 121 and the outdoor side lower frame 122.

[0077] In addition, the connecting fitting 75 is not limited to a block shape, but may be formed by bending a plate-shaped member to form an outdoor side fixing portion 75a and an indoor side fixing portion 75b, and forming through holes 75c, 75c, 75d, and 75d, as shown in Figures 9(d) and (e).

[0078] Furthermore, in the fittings of the above embodiment, the connecting fittings 75 and the spacers 74 are provided as separate bodies, but the connecting fittings 75 and the spacers 74 may be formed integrally. For example, as shown in Figures 10(a), (b), and (c), the connecting fitting 75 may have a shape in which a spacer portion 75e having a mounting surface 75f for placing the mounting portion 125c of the rail-to-rail attachment 125 is integrally formed with a part of the indoor fixing portion 75b, specifically, between the left and right through holes 75d, 75d.

[0079] As shown in FIGS. 11(a), (b), and (c), the connecting fitting 75 may have a shape in which a block-shaped spacer portion 75e is fixed to a plate-shaped connecting fitting. By forming the connecting fitting 75 and the spacer 74 as an integral part, workability can be improved.

[0080] Furthermore, the connecting fitting 75 may be provided with an insulating sheet 75g on the surface spanning the heat insulating bridge 123 as shown in FIGS. By providing an insulating sheet 75g on the underside of the connecting fitting 75, the transfer of cold heat from the outdoor lower frame 122 to the indoor lower frame 121 by the connecting fitting 75 can be suppressed, and the insulating effect of the insulating bridge 123 can be prevented from being reduced.

[0081] As described above, the building fixture of this embodiment connects the indoor side sill 121 and the outdoor side sill 122 of the sill 12 with connecting fittings 75, thereby preventing a situation in which the insulating bridge 123 melts in the early stages of a fire, causing the outdoor side sill 122 to fall outside and the outer screen 3 to come off (Figures 12(a)(b)).

[0082] In addition, in the building fixture of this embodiment, the connecting fittings 75 connect the inside sill 121 and the outside sill 122 at or near the roller position of the inner and outer screens 2 and 3, so that the load of the inner and outer screens 2 and 3 applied to the sill 12 can be supported by the parts connected by the connecting fittings 75, thereby improving the load-resistant strength of the screens (especially the outer screen 3).

[0083] In addition, the connecting fittings 75 can be fixed from the inner periphery of the existing fixture, as the exterior fixing part is fixed with a screw into the vertical screw holes, and the interior fixing part is fixed by screwing diagonally downward from the upper outside to the lower inside. This allows the fittings to be fixed from the inner periphery of the existing fixture, thereby imparting strength and fire resistance to the existing sill. In addition, the connecting fitting 75 can be placed within the space between the inter-rail attachment 125 and the lower frame 12 formed by the lower frame guide 73, so that the existing components of the lower frame 12 can be reinforced without changing them, and after reinforcement, the connecting fitting is positioned below and covered by the inter-rail attachment 125, resulting in good design characteristics.

[0084] It goes without saying that the above embodiments do not limit the invention described in the claims, but are treated as examples. [Explanation of symbols]

[0085] 12: Bottom frame 12c:Outdoor hollow part 71: Water stop piece 72: End cap 73: Lower frame guide 74: Spacer 75: Connecting fittings 75a:Outdoor fixing part 75b: Indoor fixed part 75c: Through hole 75d: Through hole 81: Lower frame cover reinforcement 81a: Mitsukebe 81b: Prospect section 82: Lower frame reinforcement 81a: Mitsukebe 81b: Prospect section 92: Door roller 121: Interior bottom frame 121a: Indoor lower frame body part 121b: Interior side wall 121d: Lower inner rail 122:Outside bottom frame 122a: Outdoor lower frame body part 122b:Outdoor bottom wall 122c: Exterior wall 122d: Lower outer rail 123: Insulated bridge 125: Rail-to-rail attachment 126: Lower frame cover part 126a: Interior side wall 126b: Upper wall f1-f4: Heat foaming material

Claims

[Claim 1] It is equipped with an aluminum sill and a shoji screen that is supported by the sill. The lower frame has an outer rail, an inner rail, and an aluminum hollow inter-rail attachment disposed between the outer rail and the inner rail via a short resin lower frame guide, and has an upper surface formed to be substantially flush with the rail; The rail-to-rail attachment is provided with a heated foaming material on the exterior side and the bottom along the entire length of the longitudinal direction. A fixture in which the heated foam material is inserted between the bottom frame guide and the rail attachment, separating it from the bottom frame over its entire longitudinal length.

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