Building materials

Abstract

To provide a fitting whose thermal insulation and dew-proofing performance can be increased while enhancing fire resistance strength and wind pressure resistance performance.SOLUTION: An upper frame 21 of a fitting 1 has an outer metal upper frame member 25 made of metal provided on the outer circumference of a frame body 2 and an inner resin upper frame member 26 made of resin provided on the inner circumference of the outer metal upper frame member 25. An outer metal profile 251 is formed of a hollow structure having metal hollow sections 251a and 251b. The inner resin upper frame member 26 is formed of a hollow structure having resin hollow sections 261 and 262, and is positioned along the underside of the outer metal profile 251 between an outdoor side lower protruding rail 211 and an indoor side lower protruding rail 212.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to building materials. [Background technology]

[0002] Conventionally, there is known a fitting comprising a frame body having an upper frame, an outer shoji screen arranged on the outside of the frame body, and an inner shoji screen arranged on the inside of the frame body (see, for example, Patent Document 1). The upper frame described in Patent Document 1 comprises a metal shaped member arranged on the outer periphery of the frame body, and a resin shaped member arranged on the inner periphery of the frame body. The metal shaped member is formed of a hollow structure shaped member having a hollow portion. As a result, the metal shaped member arranged on the outer periphery of the upper frame has a hollow portion, which can improve fire resistance strength and wind pressure resistance in the event of a fire. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-53589 Summary of the Invention [Problem to be solved by the invention]

[0004] When the metal section arranged on the outer periphery of the upper frame has a hollow portion, the surface area of ​​the metal section of the upper frame exposed to the outside increases. This increases the area of ​​the metal section of the upper frame that comes into contact with cold air, which may result in a decrease in insulation performance and moisture prevention performance. Therefore, there is a need to improve insulation performance and moisture prevention performance while increasing fire resistance and wind pressure resistance.

[0005] The present disclosure aims to provide building materials that can improve heat insulation and moisture prevention performance while increasing fire resistance and wind pressure resistance. [Means for solving the problem]

[0006] The present disclosure relates to a fitting comprising a frame body having an upper frame, an outer shoji screen arranged on the outside of the frame body, and an inner shoji screen arranged on the inside of the frame body, wherein the upper frame has an outer metal upper frame material made of metal arranged on the outer periphery of the frame body, and an inner resin upper frame material made of resin arranged on the inner periphery of the outer metal upper frame material on the inner periphery of the frame body, wherein the outer metal upper frame material has an outer downward-protruding rail formed to protrude downward on the outside of the room and guide the upper end of the outer shoji screen, and an inner downward-protruding rail formed to protrude downward on the inside of the room and guide the upper end of the inner shoji screen, wherein the outer metal upper frame material is formed of a hollow-structured shaped material with a metal hollow portion, and the inner resin upper frame material is formed of a hollow-structured shaped material with a resin hollow portion and is arranged along the underside of the outer metal upper frame material between the outer downward-protruding rail and the indoor downward-protruding rail. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a front view of a sliding window according to a first embodiment, viewed from the inside of the room. [Figure 2] FIG. 2 is a longitudinal cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 2 is a cross-sectional view taken along line BB in FIG. [Figure 4] FIG. 2 is an enlarged cross-sectional view showing the structure of the upper frame of the first embodiment. [Figure 5] FIG. 10 is an enlarged cross-sectional view showing the structure of the upper frame of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. A sliding window 1 constituting a fitting of a first embodiment will be described. In this specification, the "visible direction" refers to the face direction of the face panels 35, 45 of the sliding window 1 placed in an opening formed in the wall of a building, and the "visible direction" refers to the thickness direction (i.e., the depth direction) of the face panels 35, 45. The "visible direction" also refers to the indoor / outdoor direction. The "visible surface" refers to the surface of the sliding window 1 facing the outside and the inside, respectively, and the "visible surface" refers to the surface of the sliding window 1 extending in the indoor / outdoor direction. In the drawings, the outdoor side of the sliding window 1 is designated as the outdoor side X1, and the indoor side of the sliding window 1 is designated as the indoor side X2.

[0009] As shown in Figures 1 to 3, a sliding window 1 is made up of a frame 2 attached to an opening in a building frame (not shown), and two shoji screens, an outer shoji screen 3 placed on the outside X1 and an inner shoji screen 4 placed on the inside X2, fitted inside the frame 2, as well as one screen 51 placed on the outside X1 of the outer shoji screen 3. The outer shoji screen 3 and inner shoji screen 4 can slide left and right (horizontally) within the frame 2 in the viewing direction.

[0010] The frame body 2 is formed into a circumferential shape surrounding all four sides by framing an upper frame 21, a lower frame 22, and a pair of left and right vertical frames 23, 24 in a rectangular shape. As shown in Figure 2, the upper frame 21 is provided with an exterior rail 211 (an exterior rail that protrudes downward) and an interior rail 212 (an interior rail that protrudes downward). The upper frame 21 has a screen rail 213 on the exterior side X1 of the exterior rail 211. The exterior rail 211 is formed to protrude downward from the upper frame 21 at the exterior side X1 of the upper frame 21, and guides the upper end of the outer shoji screen 3. The interior rail 212 is formed to protrude downward from the upper frame 21 at the interior side X2 of the upper frame 21, and guides the upper end of the inner shoji screen 4.

[0011] The lower frame 22 is provided with an outdoor rail 221 and an indoor rail 222. The lower frame 22 has a screen rail 223 on the outdoor side X1 of the outdoor rail 221.

[0012] The screen door 51 is engaged with the screen door rails 213, 223 of the upper frame 21 and the lower frame 22 so as to be movable in the left-right direction.

[0013] As shown in Figures 1 to 3, the outer shoji screen 3 is constructed by fitting a panel 35 made of three pieces of glass inside a rectangular frame body 30 consisting of an upper frame 31, a lower frame 32, a vertical frame 33 located on the door tip side, and an outer joining frame 34, which is a vertical frame located on the door tail side. The outer shoji screen 3 is engaged with the outdoor rails 211, 221 of the upper frame 21 and the lower frame 22 so that it can move left and right. The lower frame 32 of the outer shoji screen 3 is provided with a door roller 36 that rolls on the outdoor rail 221 of the lower frame 22.

[0014] The inner shoji screen 4 is constructed by fitting a panel 45 made of three pieces of glass inside a rectangular frame body 40 consisting of an upper frame 41, a lower frame 42, a vertical frame 43 located at the door tip, and an inner joining frame 44 located at the door tail. The inner shoji screen 4 is engaged with the interior rails 212, 222 of the upper frame 21 and the lower frame 22 so that it can move left and right. The lower frame 42 of the inner shoji screen 4 is provided with a door roller 46 that rolls on the interior rail 222 of the lower frame 22.

[0015] As shown in Figures 2 and 3, the upper frame 31, lower frame 32, vertical frame 33 and outer joining frame 34 of the outer shoji screen 3 each have a composite structure in which resin frame materials 312, 322, 332, 342 are attached to the indoor side X2 of metal frame materials 311, 321, 331, 341. The upper frame 41, lower frame 42, vertical frame 43 and inner joining frame 44 of the inner shoji screen 4 each have a composite structure in which resin frame materials 412, 422, 432, 442 are attached to the indoor side X2 of metal frame materials 411, 421, 431, 441. This gives the outer shoji screen 3 and inner shoji screen 4 excellent thermal insulation and moisture resistance.

[0016] The configuration of the frame body 2 will be described in further detail. As shown in FIG. 2, the upper frame 21 has a metal outer-periphery metal upper frame member 25, a resin inner-periphery inter-rail resin cover 26 (inner-periphery resin upper frame member), and a resin inner-periphery interior resin cover 27. The outer-periphery metal upper frame member 25 is disposed on the outer periphery of the frame body 2. The inner-periphery inter-rail resin cover 26 and the inner-periphery interior resin cover 27 are disposed on the inner periphery of the outer-periphery metal upper frame member 25 on the inner periphery of the frame body 2. The upper frame 21 has a composite structure in which the inner-periphery inter-rail resin cover 26 and the inner-periphery interior resin cover 27 are attached to the inner surface of the outer-periphery metal upper frame member 25. This provides excellent thermal insulation and moisture resistance.

[0017] As shown in FIG. 4 , the outer peripheral metal upper frame member 25 includes an outdoor metal shape member 251 disposed on the outdoor side X1, an indoor metal shape member 255 disposed on the indoor side X2, and a bridge member 257 disposed between the outdoor metal shape member 251 and the indoor metal shape member 255. The outer peripheral metal upper frame member 25 is divided into the outdoor metal shape member 251 and the indoor metal shape member 255 between the outdoor rail 211 and the indoor rail 212. The outdoor metal shape member 251 and the indoor metal shape member 255 are connected by a bridge member 257. The bridge member 257 is a connecting member made of resin. The bridge member 257 blocks heat conduction between the outdoor metal shape member 251 and the indoor metal shape member 255, thereby achieving excellent thermal insulation performance.

[0018] The outdoor metal extrusion 251 is formed of a hollow metal extrusion having two hollow metal portions 251a and 251b. The outdoor metal extrusion 251 has an outdoor metal extrusion body 252 having two hollow metal portions 251a and 251b, an outdoor rail 211, a screen door rail 213, and an upward extension plate 253.

[0019] In the outdoor-side metal profile main body 252, the two metal hollow portions 251a, 251b are arranged side by side in the indoor-outdoor direction. The metal hollow portion 251a is arranged on the outdoor side X1. The metal hollow portion 251b is arranged on the indoor side X2. The outdoor-side X1 portion of the bridge material 257 is arranged to fit into the side surface of the lower end of the indoor side X2 end of the outdoor-side metal profile main body 252.

[0020] The upward extension plate 253 protrudes upward from the upper surface of the end portion on the indoor side X2 of the outdoor metal shaped member main body 252. The upward extension plate 253 is fixed to a building skeleton (not shown). The screen door rail 213 protrudes downward from the underside of the end portion on the outdoor side X1 of the outdoor metal shaped member main body 252. The outdoor rail 211 protrudes downward from the underside of the indoor side X2 at the outdoor side X1 of the outdoor metal shaped member main body 252 further than the screen door rail 213.

[0021] The indoor-side metal profile 255 is formed of a solid member with no hollow portion. The indoor-side metal profile 255 has an indoor-side metal profile main body 256 extending in the indoor-outdoor direction, and an indoor-side rail 212. The indoor-side X2 portion of the bridge material 257 is fitted into the side surface of the outdoor-side X1 end of the upper end of the indoor-side metal profile main body 256. The indoor-side rail 212 protrudes downward from the outdoor-side X1 end of the indoor-side metal profile main body 256.

[0022] The inner rail-to-rail resin cover 26 is disposed between the outdoor rail 211 and the indoor rail 212, along the underside of the outdoor metal profile 251. The inner rail-to-rail resin cover 26 is disposed so as to cover at least the portion of the underside of the outdoor metal profile 251 that is closer to the outdoor side X1 than the bridge material 257. The inner rail-to-rail resin cover 26 is provided over the entire length of the upper frame 21 in the direction in which it extends.

[0023] The inner rail-to-rail resin cover 26 is positioned slightly below and away from the underside (inner surface) of the outdoor metal shape member 251. A gap S is provided between the inner rail-to-rail resin cover 26 and the underside (inner surface) of the outdoor metal shape member 251 of the outer metal upper frame member 25. By providing the gap S, an air layer is formed, thereby improving the heat insulation performance and moisture prevention performance.

[0024] The inner-rail resin cover 26 has a width in the up-down direction and extends in the indoor-outdoor direction. The inner-rail resin cover 26 is formed of a resin shaped member in a hollow structure with two resin hollow portions 261, 262 arranged side by side in the indoor-outdoor direction. The inner-rail resin cover 26 has an upper plate 263 arranged to extend in the indoor-outdoor direction, a lower plate 264 arranged below the upper plate 263 and spaced apart from the upper plate 263, extending in the indoor-outdoor direction parallel to the upper plate 263, and three vertical plates 265 connecting the upper plate 263 and the lower plate 264.

[0025] The upper plate 263 and the lower plate 264 extend in the indoor / outdoor direction with approximately the same length in the indoor / outdoor direction. Each of the three vertical plates 265 is formed in the shape of a vertical plate connecting the upper plate 263 and the lower plate 264. Each of the three vertical plates 265 is formed from a plate material having a thickness in the indoor / outdoor direction, and extends in the up-down direction as well as in the direction in which the upper frame 21 extends.

[0026] The three vertical plates 265 are arranged side by side and spaced apart in the indoor / outdoor direction. The three vertical plates 265 divide the space between the upper plate 263 and the lower plate 264 into two resin hollow portions 261, 262 arranged side by side in the indoor / outdoor direction. The resin hollow portion 261 is arranged on the outdoor side X1, and the resin hollow portion 262 is arranged on the indoor side X2.

[0027] Both indoor / outdoor end portions 263a of the top plate 263 are formed to protrude outward in the indoor / outdoor direction. Both indoor / outdoor end portions 263a of the top plate 263 are engaged with the inner periphery of the outer peripheral metal upper frame member 25 with a gap S between the inner periphery inter-rail resin cover 26 and the inner surface of the outdoor-side metal shape member 251 of the outer peripheral metal upper frame member 25.

[0028] The inner periphery-side indoor-side resin cover 27 is configured to include the indoor-side X2 portion of the indoor-side rail 212 of the upper frame 21, and is provided from the indoor-side X2 surface of the indoor-side rail 212 to the inner surface of the outer periphery-side metal upper frame material 25. The inner periphery-side indoor-side resin cover 27 is provided over the entire length of the upper frame 21 in the extension direction.

[0029] The inner periphery-side indoor-side resin cover 27 is formed of a solid member with no hollow portion. The inner periphery-side indoor-side resin cover 27 is formed in a generally L-shaped cross section with the lower side and the indoor side X2 open. The indoor side resin cover material 27 has an angle portion 271 that protrudes toward the indoor side X2 beyond the indoor side end portion 25a of the outer periphery-side metal upper frame material 25. The inner periphery-side indoor-side resin cover 27 is provided over the entire length in the extension direction of the upper frame 21.

[0030] By configuring the upper frame 21 as described above, the fire resistance and wind pressure resistance are improved by the metal hollow sections 251a, 251b of the outdoor metal profile 251 of the outer metal upper frame member 25, while the insulation and moisture-proofing performance are improved by providing the resin hollow sections 261, 262 in the inner rail-to-rail resin cover 26. Therefore, the upper frame 21 can achieve both improved insulation and moisture-proofing performance and improved fire resistance and wind pressure resistance.

[0031] As shown in Figure 2, the lower frame 22 has a composite structure in which resin cover materials 226, 227 are attached to the inner surface of the metal frame body 224, which is the frame body main body. This provides excellent thermal insulation and moisture resistance. The metal frame body 224 is divided into an outdoor metal frame body 2241 and an indoor metal frame body 2242 between the outdoor rail 221 and the indoor rail 222. The outdoor metal frame body 2241 and the indoor metal frame body 2242 are connected by a bridge material 2243. The bridge material 2243 is a connecting material made of resin.

[0032] The resin cover material 226 is arranged between the outdoor rail 221 and the indoor rail 222 on the lower frame 22. Specifically, the resin cover material 226 is arranged on the inner surface of the outdoor metal frame body 2241, closer to the outdoor side X1 than the bridge material 2243. The resin cover material 227 is arranged on the indoor side X2 than the indoor rail 222 on the lower frame 22. The resin cover materials 226, 227 are provided over the entire length of the lower frame 22 in the extension direction.

[0033] As shown in Figure 3, the vertical frame 23 arranged on the door edge side of the outer shoji screen 3 has a composite structure in which a resin cover material 232 is attached to the inner surface of a metal frame body 231, which is the frame body main body. Therefore, it has excellent heat insulation and moisture prevention properties. The resin cover material 232 is arranged on the inner surface of the vertical frame 23, closer to the room side X2 than the outer shoji screen 3 when it is closed. The resin cover material 232 has an angle portion 2321 that protrudes toward the room side X2 beyond the room side end 231a of the metal frame body 231. The resin cover material 232 is provided over the entire length of the vertical frame 23 in the extension direction.

[0034] As shown in Figure 3, the vertical frame 24 arranged on the door edge side of the inner shoji screen 4 has a composite structure in which a resin cover material 242 is attached to the inner surface of a metal frame body 241, which is the frame body main body. Therefore, it has excellent heat insulation and moisture prevention properties. The resin cover material 242 is arranged on the inner surface of the vertical frame 24, closer to the room side X2 than the inner shoji screen 4 when it is closed. The resin cover material 242 has an angle portion 2421 that protrudes toward the room side X2 beyond the room side end portion 241a of the metal frame body 241. The resin cover material 242 is provided over the entire length of the vertical frame 24 in the extension direction.

[0035] The first embodiment provides the following advantages: The sliding window 1 of this embodiment includes a frame body 2 having an upper frame 21, and the upper frame 21 has a metal outer-periphery metal upper frame member 25 arranged on the outer periphery of the frame body 2, and a resin inner-periphery inter-rail resin cover 26 arranged on the inner periphery of the outer-periphery metal upper frame member 25 on the inner periphery of the frame body 2, the outdoor metal extrusion 251 being formed from a hollow-structured extrusion having metal hollow portions 251a, 251b, and the inner-periphery inter-rail resin cover 26 being formed from a hollow-structured extrusion having resin hollow portions 261, 262, and being arranged along the underside of the outdoor metal extrusion 251 between the outdoor rail 211 and the indoor rail 212.

[0036] As a result, fire resistance and wind pressure resistance are improved by the metal hollow sections 251a, 251b of the outdoor metal section 251 of the outer metal upper frame member 25, while heat insulation and moisture prevention are improved by providing the resin hollow sections 261, 262 of the inner rail-to-rail resin cover 26. Therefore, the upper frame 21 can achieve both improved heat insulation and moisture prevention, and improved fire resistance and wind pressure resistance.

[0037] In addition, in this embodiment, the outer peripheral metal upper frame member 25 has an outdoor metal shape member 251 arranged on the outdoor side X1, an indoor metal shape member 255 arranged on the indoor side X2, and a bridge member 257 arranged between the outdoor metal shape member 251 and the indoor metal shape member 255. As a result, the bridge member 257 blocks heat conduction between the outdoor metal shape member 251 and the indoor metal shape member 255, thereby achieving excellent heat insulation performance.

[0038] In this embodiment, the inner-rail resin cover 26 is arranged to cover at least the portion of the underside of the outdoor metal profile 251 that is closer to the outdoor side X1 than the bridge material 257. This improves the heat insulating and moisture-proofing performance in the portion of the outdoor side X1 that is closer to the bridge material 257, thereby further improving the heat insulating and moisture-proofing performance of the upper frame 21.

[0039] In addition, in this embodiment, the inner inter-rail resin cover 26 has a plurality of resin hollow portions 261, 262. This allows the plurality of resin hollow portions 261, 262 to increase the air layer, thereby further improving the heat insulation performance and moisture prevention performance.

[0040] Furthermore, in this embodiment, a gap S is provided between the outdoor metal profile 251 of the outer metal upper frame member 25 and the inner rail-to-rail resin cover 26. This creates an air layer through the gap S, thereby further improving the heat insulating performance and moisture-proofing performance. Note that, although the size of the gap S is small in this embodiment, the size of the gap S is not limited. If the gap S is large, the heat insulating performance and moisture-proofing performance can be further improved. On the other hand, if the gap S is made large, the size of the upper frame 21 will increase. Therefore, it is preferable to set the size of the gap S, for example, taking into consideration the heat insulating performance, moisture-proofing performance, and the size of the upper frame 21.

[0041] Next, a second embodiment will be described. The description of the first embodiment can be applied to points that are not described in the second embodiment. In the second embodiment, the same components as those in the first embodiment are assigned the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

[0042] As shown in FIG. 5, an inner inter-rail resin cover 26A of the second embodiment differs from the inner inter-rail resin cover 26 of the first embodiment in the number of resin hollow portions.

[0043] The inner rail-to-rail resin cover 26A of the second embodiment is configured as a hollow structure having an upper outdoor resin hollow portion 261a (resin hollow portion) formed on the upper side of the outdoor side X1, a lower outdoor resin hollow portion 261b (resin hollow portion) formed on the lower side of the outdoor side X1, an upper indoor resin hollow portion 262a (resin hollow portion) formed on the upper side of the indoor side X2, and a lower indoor resin hollow portion 262b (resin hollow portion) formed on the lower side of the indoor side X2.

[0044] In the second embodiment, the two resin hollow sections 261, 262 arranged side by side in the indoor-outdoor direction of the inner-rail resin cover 26 of the first embodiment are vertically separated by a horizontal plate member 266 that has a thickness in the vertical direction and extends in the indoor-outdoor direction. This allows four resin hollow sections 261a, 261b, 262a, and 262b to be formed in the inner-rail resin cover 26A. The horizontal plate member 266 allows the two resin hollow sections 261a, 261b to be stacked in the vertical direction on the outdoor side X1 of the inner-rail resin cover 26A, and the two resin hollow sections 262a, 262b to be stacked in the vertical direction on the indoor side X2.

[0045] In the second embodiment, two resin hollow sections 261a, 261b are arranged stacked in the vertical direction on the outdoor side X1, and two resin hollow sections 262a, 262b are arranged stacked in the vertical direction on the indoor side X2. This results in two air layers stacked in the vertical direction, improving the thermal insulation performance and moisture prevention performance of the upper frame 21 in the vertical direction. This further improves the thermal insulation performance and moisture prevention performance against heat transferred from the outdoor side metal profile 251 side of the outer peripheral metal upper frame member 25 made of metal and arranged above the inner peripheral inter-rail resin cover 26A.

[0046] Although a preferred embodiment of the present disclosure has been described above, the present disclosure is not limited to the above-described embodiment and can be modified as appropriate.

[0047] In the first embodiment, two resin hollow portions 261, 262 are provided in the inner rail-to-rail resin cover 26 (inner resin upper frame member). In the second embodiment, four resin hollow portions 261a, 261b, 262a, and 262b are provided in the inner rail-to-rail resin cover 26A (inner resin upper frame member). However, the number of resin hollow portions is not limited. The number of resin hollow portions may be one, three, or five or more.

[0048] In the second embodiment, the four resin hollow sections 261a, 261b, 262a, and 262b are stacked in two layers in the vertical direction and arranged in two rows in the indoor-outdoor direction, but this is not limited to this. The number of layers of resin hollow sections stacked in the vertical direction and the number of rows of resin hollow sections arranged in the indoor-outdoor direction can be set to any number. Furthermore, multiple resin hollow sections may be stacked in the vertical direction only, rather than arranged in the indoor-outdoor direction. [Explanation of symbols]

[0049] 1 Sliding window (door), 2 Frame body, 21 Upper frame, 3 Outer shoji (shoji), 4 Inner shoji (shoji), 25 Outer metal upper frame material, 26 Inner rail resin cover (inner resin upper frame material), 211 Outdoor rail (outdoor downward protruding rail), 212 Indoor rail (indoor downward protruding rail), 251 Outdoor metal shaped material, 251a, 251b Metal hollow part 255, Indoor metal shaped material, 257 Bridge material, 261, 262 Resin hollow part, S Gap

Claims

1. a frame body having an upper frame; An outer shoji screen arranged on the outside of the room within the frame body; An inner shoji screen arranged on the indoor side within the frame body, The upper frame has an outer peripheral metal upper frame member made of metal and arranged on the outer peripheral side of the frame body, and an inner peripheral resin upper frame member made of resin and arranged on the inner peripheral side of the outer peripheral metal upper frame member, The outer metal upper frame material has an exterior downward-projecting rail that is formed to project downward on the exterior side and guides the upper end of the outer sash, an interior downward-projecting rail that is formed to project downward on the interior side and guides the upper end of the inner sash, and a protruding piece that is formed to project inward on the exterior side of the exterior downward-projecting rail, The outer peripheral metal upper frame member is formed of a hollow structured shape member having a plurality of metal hollow portions, The inner peripheral resin upper frame member is formed of a hollow structured shaped member having a resin hollow portion, and is disposed along the underside of the outer peripheral metal upper frame member between the outdoor side downward-projecting rail and the indoor side downward-projecting rail, The inner peripheral resin upper frame member has an upper surface plate that is engaged with the outer peripheral metal upper frame member, and a lower surface plate that is connected to the upper surface plate via the resin hollow portion below the upper surface plate, is disposed between the outdoor side downward-protruding rail and the indoor side downward-protruding rail, and is disposed without being engaged with the outer peripheral metal upper frame member, The protruding piece is formed to protrude inward from a metal hollow portion that is arranged on the outermost side of the room among the plurality of metal hollow portions, The outer peripheral metal upper frame material is a fixture having an exterior metal profile placed on the exterior side, an interior metal profile placed on the interior side, and a bridge material placed between the exterior metal profile and the interior metal profile.

2. The fixture according to claim 1, wherein the inner peripheral resin upper frame material is arranged so as to cover at least the portion of the underside of the outdoor metal profile that is more outdoor-side than the bridge material.

3. The fixture according to claim 1 or 2, wherein the inner peripheral resin upper frame material has a plurality of resin hollow portions.

4. The fixture according to claim 3 , wherein at least two of the plurality of resin hollow sections are arranged in a stacked manner in the vertical direction.

5. The fitting according to any one of claims 1 to 4, wherein a gap is provided between the outer peripheral metal upper frame material and the inner peripheral resin upper frame material.

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