Fitting

Abstract

To provide a fitting capable of improving a heat insulation property.SOLUTION: The fitting comprises a frame body, and a sash provided inside the frame body. The frame body has a metallic frame member 21, and a resin frame member 23 provided on an indoor side of the metallic frame member 21. The sash has a stile, and a face bar 32 provided inside the stile. The stile has a metallic stile member 33, and a resin stile member 34 having hollow parts 34a, 34b, 34c, provided on the indoor side of the metallic stile member 33. The metallic stile member 33 has a main body part 330 supporting the face bar 32, and a stile protrusion piece 338 protruding from the main body part 330 toward the indoor side. The stile protrusion piece 338 comes into contact with a frame airtight material 227 attached to the metallic frame member 21.SELECTED DRAWING: Figure 6

Description

[Technical field]

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

[0002] Conventionally, there is known a fitting used for a sash for a building, which comprises a screen and a frame in which a metal member made of metal such as aluminum and a resin member made of resin are connected (for example, see Patent Document 1). The resin member of the screen is disposed on the interior side of the metal member and has a hollow portion. By providing a hollow portion in the resin member of the screen, the heat insulating performance of such a fitting is improved. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-167569 A Summary of the Invention [Problem to be solved by the invention]

[0004] In these types of fittings, the airtightness and heat insulation performance of the fittings are improved by contacting the frame airtight material attached to the metal member of the frame with the indoor facing surface of the metal member of the shoji from the indoor side. Therefore, the size of the hollow part of the resin member of the shoji is limited by the position of the indoor facing surface of the metal member of the shoji, and the desired heat insulation may not be ensured.

[0005] The present disclosure aims to provide a building material that can improve thermal insulation performance. [Means for solving the problem]

[0006] In order to achieve the above-mentioned objective, the building fixture of the present disclosure comprises a frame body and a shoji screen arranged inside the frame body, the frame body comprising a metal frame member made of metal and a resin frame member arranged on the indoor side of the metal frame member, the shoji screen comprising a frame and a surface material arranged on the inside of the frame, the frame comprising a metal frame member made of metal and a resin frame member having a hollow portion arranged on the indoor side of the metal frame member, the metal frame member comprising a main body portion supporting the surface material and a frame protruding piece protruding from the main body portion to the indoor side, the frame protruding piece contacting a frame airtight material attached to the metal frame member. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a vertical cross-sectional view of the fitting of the first embodiment. [Diagram 2] FIG. 2 is a horizontal cross-sectional view of the fitting of the first embodiment. [Diagram 3] FIG. 2 is a view of the fitting of the first embodiment as seen from the indoor side. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Diagram 5] FIG. 4 is a cross-sectional view taken along line BB in FIG. [Figure 6] FIG. 5 is an enlarged view of the lower part of FIG. [Figure 7] FIG. 6 is an enlarged view of the lower part of FIG. [Figure 8] FIG. 7 is a diagram showing a state in which the heat-foamable material in FIG. 6 is foamed. [Figure 9] FIG. 8 is a diagram showing a state in which the heat-foamable material in FIG. 7 is foamed. [Figure 10] FIG. 5 is an enlarged view of the upper part of FIG. [Figure 11] FIG. 6 is an enlarged view of the upper part of FIG. [Figure 12] FIG. 11 is a diagram showing a state in which the heat-foamable material of FIG. 10 is foamed. [Figure 13] FIG. 12 is a diagram showing the state in which the heat-foamable material in FIG. 11 is foamed. [Figure 14] 4 is a diagram showing one side in the width direction of a cross-sectional view taken along line CC in FIG. 3. FIG. [Figure 15] FIG. 13 is a diagram showing the state in which the heat-foaming material foams. [Figure 16] 4 is a diagram showing the other side in the width direction of the cross-sectional view taken along line CC in FIG. 3. FIG. [Figure 17] 4 is a diagram showing a central portion in the width direction of a cross-sectional view taken along line CC in FIG. [Figure 18] This is a vertical cross-sectional view of the bottom frame of an inner shoji screen. [Figure 19] This is a vertical cross-sectional view of the bottom frame of an inner shoji screen during a fire. [Figure 20] This is a vertical cross-sectional view of the bottom frame and bottom sill of an inner shoji screen. [Figure 21] FIG. 2 is a horizontal cross-sectional view of the fitting of the first embodiment. [Figure 22] 22 is a cross-sectional view taken along line DD in FIG. 21. [Figure 23] 22 is a cross-sectional view taken along line EE in FIG. 21. [Figure 24] 22 is a cross-sectional view taken along the line FF in FIG. 21. [Diagram 25] 22 is a cross-sectional view taken along line GG in FIG. 21. [Figure 26] This is an oblique view from the indoor side showing the joint between the bottom frame and the end frame of the inner shoji screen. [Figure 27] This is an oblique view seen from the outside, showing the joint between the bottom frame and the end frame of the inner shoji screen. [Figure 28] FIG. 27 is an exploded perspective view of FIG. 26. [Figure 29] FIG. 28 is an exploded perspective view of FIG. 27. [Diagram 30] A vertical cross-sectional view showing the lower frame and lower side of the inner sash of the fitting according to the second embodiment. [Diagram 31] A horizontal cross-sectional view showing the other side in the width direction of the second vertical frame and inner sash of the building fixture according to the second embodiment. [Diagram 32] This is an oblique view from the indoor side showing the joint between the bottom frame and the end frame of the inner shoji screen. [Diagram 33] This is an oblique view seen from the outside, showing the joint between the bottom frame and the end frame of the inner shoji screen. [Diagram 34] FIG. 33 is an exploded perspective view of FIG. 32. [Diagram 35] FIG. 34 is an exploded perspective view of FIG. 33. [Diagram 36]This is an oblique view showing the metal frame member of the inner shoji door frame and the caulking sealer. [Figure 37] This is an oblique view showing the metal frame member of the inner shoji door frame and the caulking sealer. [Figure 38] FIG. 11 is a vertical cross-sectional view of the fitting of the third embodiment. [Figure 39] FIG. 11 is a horizontal cross-sectional view of the fitting of the third embodiment. [Diagram 40] FIG. 11 is a view of the fitting of the third embodiment as seen from the indoor side. [Diagram 41] 41 is a cross-sectional view taken along line HH in FIG. 40. [Diagram 42] 41 is a cross-sectional view taken along line II in FIG. 40. [Diagram 43] FIG. 42 is a diagram showing the state in which the heat-foamable material in FIG. 41 is foamed. [Diagram 44] FIG. 43 is a diagram showing the state in which the heat-foamable material in FIG. 42 is foamed. [Diagram 45] FIG. 11 is a vertical cross-sectional view of the fitting of the third embodiment. [Figure 46] FIG. 11 is a horizontal cross-sectional view of the fitting of the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (First embodiment) The fitting 1 shown in Figures 1 to 3 is a sliding sash. The fitting 1 is an aluminum-resin composite sash having a metal member such as aluminum and a resin member. The fitting 1 is a sash for a building. The fitting 1 is provided in an opening 12 in a wall 11 that separates the indoor and outdoor parts of a building. In the drawings, the outdoor part is indicated with a reference number 13, and the indoor part is indicated with a reference number 14. Figure 3 is a view from the indoor side. The direction perpendicular to the wall part is indicated as the indoor-outdoor direction. The horizontal direction along the wall part 11 is indicated as the width direction. In the width direction, the left side as viewed from the indoor side is indicated as one side, and the right side as viewed from the indoor side is indicated as the other side.

[0009] The fitting 1 has a frame body 2, an outer screen 3, and an inner screen 4. The frame body 2 is provided along the edge of the opening of the wall portion 11 of the building. The outer screen 3 and the inner screen 4 are supported by the frame body 2 so as to be slidable in the width direction. When the outer screen 3 and the inner screen 4 close the opening 12, the outer screen 3 is disposed on one side in the width direction inside the frame body 2, and the inner screen 4 is disposed on the other side in the width direction inside the frame body 2. The position where the outer screen 3 and the inner screen 4 are disposed when closing the opening 12 is referred to as the closed position. In the explanation of the frame body 2, the outer screen 3, and the inner screen 4, the side where each of the two ends is located relative to the center position in the width direction is sometimes referred to as the outer side in the width direction, and the center position relative to the positions of each of the two ends in the width direction is sometimes referred to as the inner side in the width direction.

[0010] The frame body 2 has a lower frame 2a, an upper frame 2b, a first vertical frame 2c, and a second vertical frame 2d. The outer shoji 3 has a frame 31 and a surface material 32. The frame 31 of the outer shoji 3 has a lower frame 31a, an upper frame 31b, a door end frame 31c, and a joint frame 31d. The inner shoji 4 has a frame 41 and a surface material 42. The frame 41 of the inner shoji 4 has a lower frame 41a, an upper frame 41b, a door end frame 41c, and a joint frame 41d. The frames and frames extend in either the vertical direction or the width direction. In the following explanation of the frames and frames, the direction in which they each extend may be referred to as the length direction.

[0011] The face materials 32, 42 are double-glazed glass. The face materials 32, 42 have a spacer 322 disposed between two glass sheets 321, 321. The face materials 32, 42 are fitted into grooves provided in the frames 31, 41. An elastic body 323 and a sealing material 324 are provided between the face materials 32, 42 and the sides of the grooves. The elastic body 323 is, for example, a back-up material. Hereinafter, the elastic body 323 will be referred to as a back-up material 323.

[0012] As shown in Figures 4 and 5, the lower frame 2a has a metal frame member 21 and a resin frame member 23. The metal frame member 21 and the resin frame member 23 extend in the width direction. The cross-sectional shapes of the metal frame member 21 and the resin frame member 23 are substantially the same across the entire width direction. The metal frame member 21 has a lower plate portion 211, a middle plate portion 212, an upper plate portion 213, an indoor plate portion 214, a first sight plate portion 215, a second sight plate portion 216, a third sight plate portion 217, an outer rail 218, an inner rail 219, a screen rail 220, a frame protruding piece 221, and a water drain fixing piece 222.

[0013] As shown in Fig. 6 and Fig. 7, the lower plate portion 211 is provided on the lower side and the outdoor side of the lower frame 2a. The screen rail 220 extends upward from the outdoor end of the lower plate portion 211. The second sight plate portion 216 extends upward from the indoor end of the lower plate portion 211. The third sight plate portion 217 extends upward from the vicinity of the outdoor end of the lower plate portion 211 in the indoor / outdoor direction. The water drain fixing piece 222 extends downward from the middle part of the lower plate portion 211 in the indoor / outdoor direction. The water drain member 15 is fixed to the water drain fixing piece 222. See Fig. 1 and Fig. 2 for the water drain member 15. The water drain fixing piece 222 is disposed on the indoor side of the third sight plate portion 217.

[0014] The middle plate portion 212 is provided on the upper side of the lower plate portion 211. The middle plate portion 212 extends from the upper end of the third sight plate portion 217 to the indoor side. The upper surface of the middle plate portion 212 is formed with a gradient from the indoor side toward the outdoor side toward the lower side. In the middle part of the upper surface of the middle plate portion 212 in the indoor / outdoor direction, an inclined portion 212a is formed with a gradient larger than both sides. At the indoor end of the inclined portion 212a, a rib 212b protruding upward is formed. The indoor end 212c of the middle plate portion 212 is disposed on the indoor side of the second sight plate portion 216. The second sight plate portion 216 is connected from the lower side to a position on the outdoor side of the inclined portion 212a in the middle plate portion 212.

[0015] The outer rail 218 extends upward from near the outdoor end of the middle plate 212. The outer rail 218 is disposed at a position that is more outdoor than the second sight plate 216 and more indoor than the third sight plate 217. The first sight plate 215 extends upward from a position that is more indoor than the rib 212b in the middle plate 212. The first sight plate 215 is disposed on the indoor side than the second sight plate 216. A tapping hole forming part 223 that forms a tapping hole is connected to the upper end of the first sight plate 215. The outdoor end of the tapping hole forming part 223 is disposed on the outdoor side of the surface of the outdoor side of the first sight plate 215. A rib 223a that protrudes downward is formed at the outdoor end of the tapping hole forming part 223. A rib 223b that protrudes outdoor is formed at the upper end of the tapping hole forming part 223.

[0016] The rib 223a of the tapping hole forming portion 223 and the rib 212b of the middle plate portion 212 are arranged at an interval in the vertical direction. As shown in FIG. 6, a heat foaming material 601 is provided on the outdoor side surface of the first sight plate portion 215. The heat foaming material 601 corresponds to the second heat foaming material. The heat foaming material 601 is provided over the entire length range in which the outer screen 3 in the closed state is arranged on the outdoor side surface of the first sight plate portion 215. That is, the heat foaming material 601 is provided on one side from the approximate center in the width direction of the lower frame 2a. The upper end of the heat foaming material 601 is sandwiched between the first sight plate portion 215 and the rib 223a of the tapping hole forming portion 223. The lower end of the heat foaming material 601 is sandwiched between the first sight plate portion 215 and the rib 212b of the middle plate portion 212. The heat-foamed material 601 is fixed to the first attachment plate portion 215 by crimping the rib 212b of the middle plate portion 212 to the first attachment plate portion 215 side.

[0017] As shown in Figs. 6 and 7, the indoor plate portion 214 extends upward and downward from the indoor end 212c of the middle plate portion 212. The upper end of the indoor plate portion 214 is disposed above the upper end of the first sight plate portion 215. The upper end of the indoor plate portion 214 is provided with a frame airtight material mounting portion 225 for mounting the frame airtight material 224. As shown in Fig. 7, the frame airtight material 224 is provided at a position facing the inner screen 4 in the closed position at the frame airtight material mounting portion 225. As shown in Figs. 6 and 7, a resin frame member mounting portion 226 for mounting the resin frame member 23 is provided at the vertical middle portion on the outdoor side of the indoor plate portion 214. The upper plate portion 213 is provided between the vertical middle portion of the indoor plate portion 214 and the tapping hole forming portion 223 at the upper end of the first sight plate portion 215. The inner rail 219 extends upward from the tapping hole forming portion 223.

[0018] As shown in Fig. 7, a heat-foaming material 602 is provided between the connection part with the upper plate 213 on the outdoor surface of the indoor plate 214 and the resin frame member attachment 226. The heat-foaming material 602 is provided over the entire length range of the outdoor surface of the indoor plate 214 where the inner sash 4 in the closed state is arranged. The heat-foaming material 602 is attached to the indoor plate 214 by a fixture 602a. The fixture 602a is, for example, a pressing member that is attached to the top surface of the upper plate 213 and presses the heat-foaming material 602 against the indoor plate 214 from the outdoor side.

[0019] As shown in FIG. 6 and FIG. 7, the frame protruding piece 221 protrudes from the tapping hole forming part 223 to the outdoor side. The indoor end of the frame protruding piece 221, i.e., the base end, is disposed below the rib 223b formed at the upper end of the tapping hole forming part 223 and protruding to the outdoor side. The outdoor end of the frame protruding piece 221, i.e., the tip end, is provided with a frame airtight material mounting part 228 for mounting the frame airtight material 227. As shown in FIG. 6, the frame airtight material 227 is provided over the entire length range in which the outer screen 3 in the closed state is arranged. The frame airtight material 227 contacts the frame protruding piece 338 of the lower frame 31a of the outer screen 3. As shown in FIG. 6 and FIG. 7, the outdoor end of the frame protruding piece 221 is provided with a member mounting part 229 on the frame airtight material mounting part 228.

[0020] As shown in FIG. 6, a first resin cover material 51 is provided in the range where the outer sash 3 in the closed state is disposed on the frame protruding piece 221. The first resin cover material 51 has an upper plate portion 511, an indoor plate portion 512, and an outdoor plate portion 513. The upper plate portion 511 is disposed above the frame protruding piece 221 at a distance. The indoor plate portion 512 protrudes downward from the indoor end of the upper plate portion 511. The lower end of the indoor plate portion 512 is attached to the rib 223b. The outdoor plate portion 513 protrudes downward from the outdoor end of the upper plate portion 511. The lower end of the outdoor plate portion 513 is attached to the member mounting portion 229. A second resin cover material 55 is provided in the range where the outer sash 3 in the closed state is disposed on the upper plate portion 213. The second resin cover material 55 has an upper plate portion 551, an indoor plate portion 552, and an outdoor plate portion 553. The upper plate portion 551 is disposed above the upper plate portion 213 with a gap therebetween. The indoor plate portion 552 protrudes downward from the indoor end of the upper plate portion 551. The outdoor plate portion 553 protrudes downward from the outdoor end of the upper plate portion 551. The lower end of the indoor plate portion 552 and the lower end of the outdoor plate portion 553 are in contact with the upper surface of the upper plate portion 213.

[0021] 7, a drain hole cover material 52 is provided in the area where the inner screen 4 in the closed state is disposed above the frame protruding piece 221. The drain hole cover material 52 is attached to the rib 223b and the member mounting portion 229. The drain hole cover material 52 will be described in detail later.

[0022] 6 and 7, the metal frame member 21 has a hollow portion 21a surrounded by the lower plate portion 211, the middle plate portion 212, the second sight plate portion 216, and the third sight plate portion 217. The metal frame member 21 has a hollow portion 21b surrounded by the middle plate portion 212, the upper plate portion 213, the indoor plate portion 214, and the first sight plate portion 215. The metal frame member 21 has a recess portion 21c that is surrounded by the frame protruding piece 221, the first sight plate portion 215, and the middle plate portion 212 and opens to the outdoor side.

[0023] The resin frame member 23 is provided on the indoor side at the upper side of the indoor board portion 214 of the metal frame member 21. The resin frame member 23 has a metal frame member fixing portion 231, an indoor protruding portion 232, and an outdoor protruding portion 233. The metal frame member fixing portion 231 is provided along the outdoor surface of the indoor board portion 214. The lower end portion of the metal frame member fixing portion 231 is attached to a resin frame member attachment 226 provided on the indoor side of the indoor board portion 214. The indoor protruding portion 232 protrudes from the upper end portion of the metal frame member fixing portion 231 to the indoor side. The indoor protruding portion 232 is fixed to the window frame 16. The window frame 16 is shown in FIG. 1. The outdoor protruding portion 233 protrudes from the upper end portion of the metal frame member fixing portion 231 to the outdoor side. The outdoor protruding portion 233 is disposed on the indoor board portion 214. The resin frame member 23 is in contact with a heat insulating material 17 provided in the building. For the insulation 17, see FIG.

[0024] As shown in FIG. 6, the lower frame 31a of the outer sash 3 has a metal frame member 33 and a resin frame member 34. The metal frame member 33 and the resin frame member 34 extend in the width direction. The cross-sectional shapes of the metal frame member 33 and the resin frame member 34 are substantially the same across the entire width direction. The metal frame member 33 has a groove portion 33a into which the lower edge portion of the face material 32 is fitted. The metal frame member 33 has a groove bottom plate portion 331, an indoor groove side plate portion 332, an outdoor groove side plate portion 333, an indoor plate portion 334, an outdoor plate portion 335, a lower plate portion 336, a middle plate portion 337, and a frame protruding piece 338. The gutter bottom plate portion 331 , the indoor gutter side plate portion 332 , the outdoor gutter side plate portion 333 , the indoor plate portion 334 , the outdoor plate portion 335 , the lower plate portion 336 and the middle plate portion 337 form the main body portion 330 which supports the panel 32 .

[0025] The groove bottom plate portion 331 is provided at the bottom of the groove portion 33a. The indoor groove side plate portion 332 is provided on the indoor side of the groove portion 33a. The indoor groove side plate portion 332 extends upward from the indoor end of the groove bottom plate portion 331. The outdoor groove side plate portion 333 is provided on the outdoor side of the groove portion 33a. The outdoor groove side plate portion 333 extends upward from the outdoor end of the groove bottom plate portion 331. The groove bottom plate portion 331, the indoor groove side plate portion 332 and the outdoor groove side plate portion 333 form the groove portion 33a. The surface material 32 is disposed approximately in the center of the groove portion 33a in the indoor / outdoor direction.

[0026] The indoor plate portion 334 extends downward from the middle portion in the indoor / outdoor direction of the groove bottom plate portion 331. The indoor plate portion 334 is disposed on the outdoor side of the indoor surface of the facing material 32. A resin frame member attachment portion 339 for attaching the resin frame member 34 is provided on the outdoor side of the middle portion in the vertical direction of the indoor plate portion 334. The outdoor plate portion 335 extends downward from the outdoor end portion of the groove bottom plate portion 331. The outdoor plate portion 335 is provided contiguous to the underside of the outdoor groove side plate portion 333.

[0027] The lower plate portion 336 and the middle plate portion 337 are provided between the indoor plate portion 334 and the outdoor plate portion 335. The lower plate portion 336 is provided below the middle plate portion 337. The indoor end portions of the lower plate portion 336 and the middle plate portion 337 are connected to the vertical middle portion of the indoor plate portion 334. The outdoor end portions of the lower plate portion 336 and the middle plate portion 337 are connected to the vertical middle portion of the outdoor plate portion 335. The middle plate portion 337 is provided at approximately the same height as the resin frame member attachment portion 339. The lower plate portion 336 is provided below the resin frame member attachment portion 339. The roller 300 of the outer sash 3 is provided below the middle plate portion 337 between the indoor plate portion 334 and the outdoor plate portion 335. The lower plate portion 336 is formed with a hole portion 336a that penetrates in the vertical direction. The door roller 300 is disposed in a hole 336a of the lower plate portion 336. The door roller 300 is placed on the outer rail 218 of the lower frame 2a. The upper end portion of the outer rail 218 is disposed between the indoor plate portion 334 and the outdoor plate portion 335.

[0028] A recess 334a is formed in the lower portion of the indoor plate 334, which is recessed toward the indoor side and opens toward the outdoor side. The recess 334a is disposed below the lower plate 336. A rib 334b ​​protruding downward is formed at the upper end of the recess 334a. A rib 334c protruding upward is formed at the lower end of the recess 334a. A heat foaming material 603 is provided in the recess 334a. The heat foaming material 603 is provided over the entire length of the indoor plate 334. The upper end of the heat foaming material 603 is disposed between the rib 334b ​​and the bottom of the recess 334a. The lower end of the heat foaming material 603 is disposed between the rib 334c and the bottom of the recess 334a. The heat foaming material 603 is fixed to the indoor plate 334 by crimping the lower rib 334c to the bottom side of the recess 334a.

[0029] A recess 335a is formed in the lower portion of the outdoor plate 335, recessed toward the outdoor side and opening toward the indoor side. The recess 335aa is disposed below the lower plate 336. A heat foaming material 604 is provided in the recess 335a. The heat foaming material 604 is provided over the entire length of the outdoor plate 335. Both ends of the heat foaming material 604 in the length direction, i.e., in the width direction, are fixed to the outdoor plate 335 by fasteners 604a. The fasteners 604a are, for example, pressing members attached to the lower plate 336 by screws 604b to press the heat foaming material 604 against the outdoor plate 335.

[0030] The frame protruding piece 338 protrudes indoors from a position above the recess 334a of the indoor panel 334. That is, the frame protruding piece 338 protrudes indoors from the main body 330 that supports the face material 32. The frame protruding piece 338 is disposed below the lower panel 336. The frame protruding piece 338 has a protruding panel 338a and an end panel 338b. The protruding panel 338a is flat. The protruding panel 338a protrudes indoors from the indoor surface of the indoor panel 334 with the panel surface oriented to be a substantially horizontal plane. The outdoor end of 338a is disposed outdoors from the indoor surface of the face material 32. The end panel 338b is flat. The frame protruding piece 338 protrudes downwards from the indoor end of the protruding panel 338a with the panel surface oriented to be a visible surface. The end plate portion 338b is disposed on the indoor side of the indoor groove side plate portion 332. When the outer sash 3 is disposed in the closed position, the frame airtight material 227 of the metal frame member 21 comes into contact with the indoor surface of the end plate portion 338b.

[0031] A heat foaming material 605 is provided on the lower surface of the protruding plate portion 338a. The heat foaming material 605 corresponds to the first heat foaming material. The heat foaming material 605 is provided over the entire length of the protruding plate portion 338a. A rib 334d protruding to the indoor side is formed between the recess 334a on the indoor side surface of the indoor plate portion 334 and the protruding plate portion 338a. A rib 338c protruding to the outdoor side is formed on the outdoor side surface of the end plate portion 338b. The indoor side end of the heat foaming material 605 is disposed between the protruding plate portion 338a and the rib 338c of the end plate portion 338b. The outdoor side end of the heat foaming material 605 is disposed between the protruding plate portion 338a and the rib 334d of the indoor plate portion 334. The heat-foamed material 605 is fixed to the protruding plate portion 338a by crimping the rib 338c of the end plate portion 338b upward toward the protruding plate portion 338a.

[0032] The metal frame member 33 has a hollow portion 33b surrounded by a groove bottom plate portion 331, an indoor plate portion 334, an outdoor plate portion 335 and a middle plate portion 337.

[0033] The resin frame member 34 is provided on the indoor side of the metal frame member 33. The resin frame member 34 has an indoor board portion 341, an outdoor board portion 342, a sight board portion 343, an upper board portion 344, a lower board portion 345, a first middle board portion 346, a second middle board portion 347, a lower protruding board portion 348, and a metal frame member mounting portion 349. The outdoor board portion 342 is disposed on the outdoor side of the lower side of the indoor board portion 341 with a gap therebetween. The sight board portion 343 is disposed on the outdoor side of the upper side of the indoor board portion 341 with a gap therebetween. The sight board portion 343 is disposed on the indoor side of the outdoor board portion 342. The lower end of the indoor board portion 341 and the lower end of the outdoor board portion 342 are disposed at the same height. The upper end of the indoor board portion 341 and the upper end of the sight board portion 343 are disposed at the same height. The upper end of the outdoor plate portion 342 and the lower end of the observation plate portion 343 are disposed at the same height.

[0034] The upper plate portion 344 protrudes from the upper end of the indoor plate portion 341 to the outdoor side. The outdoor end of the upper plate portion 344 protrudes further to the outdoor side than the upper end of the facing plate portion 343. The outdoor end of the upper plate portion 344 is provided with a protruding piece 344a extending downward. The lower plate portion 345 protrudes from the lower end of the indoor plate portion 341 to the outdoor side. The outdoor end of the lower plate portion 345 is connected to the lower end of the outdoor plate portion 342. The first middle plate portion 346 protrudes from the vertical middle portion of the indoor plate portion 341 to the outdoor side. The outdoor end of the first middle plate portion 346 is connected to the upper end of the outdoor plate portion 342. The lower end of the facing plate portion 343 is connected from above to the indoor / outdoor middle portion of the first middle plate portion 346. The second middle plate portion 347 protrudes from the vertical middle portion of the indoor plate portion 341 to the outdoor side. The second middle plate portion 347 is disposed between the lower plate portion 345 and the first middle plate portion 346. The outdoor side end of the second middle plate portion 347 is connected to the indoor side end of the outdoor plate portion 342. The lower protruding plate portion 348 protrudes downward from the middle portion in the indoor / outdoor direction of the lower plate portion 345. The lower protruding plate portion 348 is disposed vertically below the outdoor plate portion 342. The metal frame member mounting portion 349 is provided in the middle portion in the up-down direction on the outdoor side surface of the outdoor plate portion 342. The metal frame member mounting portion 349 is disposed at approximately the same height as the second middle plate portion 347.

[0035] Resin frame member 34 has hollow portion 34a surrounded by indoor plate portion 341, facing plate portion 343, upper plate portion 344, and second middle plate portion 347. Resin frame member 34 has hollow portion 34b surrounded by indoor plate portion 341, outdoor plate portion 342, first middle plate portion 346, and second middle plate portion 347. Resin frame member 34 has hollow portion 34c surrounded by indoor plate portion 341, outdoor plate portion 342, lower plate portion 345, and second middle plate portion 347.

[0036] The resin frame member 34 is attached to the metal frame member 33 as follows. The facing plate portion 343 of the resin frame member 34 is positioned on the indoor side of the indoor groove side plate portion 332 of the metal frame member 33. The first middle plate portion 346 of the resin frame member 34 is positioned below the groove bottom plate portion 331 of the metal frame member 33. The outdoor plate portion 342 of the metal frame member 33 is positioned on the indoor side of the indoor plate portion 334 of the metal frame member 33. The lower plate portion 345 and lower protruding plate portion 348 of the resin frame member 34 are positioned above the frame protruding piece 338.

[0037] The outdoor end and protruding piece 344a of the upper plate portion 344 of the resin frame member 34 are positioned on the outdoor side of the indoor gutter side plate portion 332 of the metal frame member 33. The upper end portion 332a of the indoor gutter side plate portion 332 is inserted into a recess 344b surrounded by the facing plate portion 343, the upper plate portion 344, and the protruding piece 344a of the resin frame member 34. The sealing material 324 provided on the indoor side of the lower edge portion of the face material 32 of the outer sash 3 contacts the outdoor surface of the protruding piece 344a of the resin frame member 34, and does not contact the indoor gutter side plate portion 332 of the metal frame member 33. The sealing material 324 provided on the outdoor side of the lower edge portion of the face material 32 of the outer sash 3 contacts the outdoor gutter side plate portion 333 of the metal frame member 33. The backup material 323 provided on the indoor side of the face material 32 and the backup material 323 provided on the outdoor side are both in contact with the metal frame member 33 .

[0038] The metal frame member mounting portion 349 of the resin frame member 34 is mounted to the resin frame member mounting portion 339 of the metal frame member 33. The lower end of the lower protruding plate portion 348 contacts the indoor end of the protruding plate portion 338a of the frame protruding piece 338 from above. The indoor plate portion 341 is disposed on the indoor side of the indoor gutter side plate portion 332 and the end plate portion 338b of the metal frame member 33. The outdoor plate portion 342 is disposed on the outdoor side of the indoor gutter side plate portion 332 and the end plate portion 338b of the metal frame member 33.

[0039] Between the metal frame member 33 and the resin frame member 34, hollow portions 33c and 33d are formed.

[0040] The hollow portions 34b, 34c of the resin frame member 34 are disposed vertically above the frame protruding piece 338 of the metal frame member 33. That is, the frame protruding piece 338 and the hollow portions 34b, 34c of the resin frame member 34 are disposed overlapping each other along the front direction. The frame protruding piece 338 is disposed outside the hollow portions 34b, 34c of the resin frame member 34 in the front direction.

[0041] The frame protruding piece 338 protruding from the main body 330 of the metal frame member 33 to the indoor side comes into contact with the frame airtight material 227 provided on the metal frame member 21 of the lower frame 2a. Compared to the case where the main body 330 of the metal frame member 33 comes into direct contact with the frame airtight material 227, the main body 330 of the metal frame member 33 can be disposed on the outdoor side. This allows a large space to be secured for installing the resin frame member 34 on the indoor side of the main body 330 of the metal frame member 33. This allows the hollow portions 34b, 34c of the resin frame member 34 to be enlarged. As a result, the thermal insulation performance of the fitting 1 can be improved.

[0042] The frame protruding piece 338 is disposed on the outside of the hollow portions 34b, 34c in the view direction. The outdoor end of the frame protruding piece is connected to the main body portion 330 at a position on the outdoor side of the indoor surface of the face material 32. With this configuration, the hollow portions 34b, 34c of the resin frame member 34 can be made larger.

[0043] As shown in FIG. 8, when a fire occurs, the heated foaming materials 603, 604, and 605 foam due to heat, and seal the space between the bottom frame 2a and the bottom sill 31a of the outer screen 3. The heated foaming material 601 is attached to the bottom frame 2a. The heated foaming materials 603, 604, and 605 are attached to the bottom sill 31a. The foamed heated foaming materials 603, 604, and 605 come into contact with each other. The foamed heated foaming material 601 seals the internal space of the recess that opens to the outside and is surrounded by the frame protruding piece 221, the first visible plate portion 215, and the middle plate portion 212 of the metal frame member 21 of the bottom frame 2a. The foamed heated foaming materials 603, 604 close the space between the recess between the indoor plate portion 334 and the outdoor plate portion 335 on the lower side of the lower plate portion 336 of the metal frame member 33 of the lower frame 31a and the outer rail 218 and the middle plate portion 212 of the lower frame 2a below it. The foamed heated foaming materials 603, 604 close the hole portion 336a for the door roller on the lower plate portion 336 of the metal frame member 33 of the lower frame 31a. The foamed heated foaming material 605 closes the space between the frame protruding piece 338 of the lower frame 31a and the middle plate portion 212 of the lower frame 2a below it. In the event of a fire, the frame airtight material 227 that was in contact with the end plate portion 338b of the frame protruding piece 338 may melt and disappear. The expanded heated foaming materials 601, 605 close the lower end of the gap between the frame airtight material mounting portion 228 at the outdoor end of the frame protruding piece 221 to which the frame airtight material 227 was attached, and the end plate portion 338b of the stile protruding piece 338. This makes it possible to prevent flames from penetrating through the gap between the bottom frame 2a and the bottom frame 31a of the outer sash 3.

[0044] As shown in Fig. 7, the lower frame 41a of the inner sash 4 has a metal frame member 43 and a resin frame member 44. The metal frame member 43 and the resin frame member 44 extend in the width direction. The cross-sectional shapes of the metal frame member 43 and the resin frame member 44 are substantially the same throughout the width direction. The metal frame member 43 has a groove portion 43a into which the lower edge portion of the face material 42 is fitted. The metal frame member 43 has a groove bottom plate portion 431, an indoor groove side plate portion 432, an outdoor groove side plate portion 433, an indoor plate portion 434, an outdoor plate portion 435, a middle plate portion 436, and a frame protruding piece 437. The gutter bottom plate portion 431 , the indoor gutter side plate portion 432 , the outdoor gutter side plate portion 433 , the indoor plate portion 434 , the outdoor plate portion 435 and the middle plate portion 436 constitute the main body portion 430 that supports the panel 42 .

[0045] The groove bottom plate portion 431 is provided at the bottom of the groove portion 43a. The indoor groove side plate portion 432 is provided on the indoor side of the groove portion 43a. The indoor groove side plate portion 432 extends upward from the indoor end of the groove bottom plate portion 431. The outdoor groove side plate portion 433 is provided on the outdoor side of the groove portion 43a. The outdoor groove side plate portion 433 extends upward from the outdoor end of the groove bottom plate portion 431. The groove bottom plate portion 431, the indoor groove side plate portion 432 and the outdoor groove side plate portion 433 form the groove portion 43a. The surface material 42 is disposed approximately in the center of the groove portion 43a in the indoor / outdoor direction.

[0046] The indoor plate portion 434 extends downward from the middle portion of the groove bottom plate portion 431 in the indoor / outdoor direction. The indoor plate portion 434 is disposed on the outdoor side of the indoor surface of the facing material 42. A resin frame member attachment portion 438 for attaching the resin frame member 44 is provided on the outdoor side of the middle portion of the indoor plate portion 434 in the vertical direction. The outdoor plate portion 435 extends downward from the outdoor end portion of the groove bottom plate portion 431. The outdoor plate portion 435 is provided on the lower side of the outdoor groove side plate portion 433. A rib 435a protruding to the indoor side is provided on the lower end portion of the outdoor plate portion 435. The indoor plate portion 434 and the outdoor plate portion 435 face each other with a gap therebetween in the indoor / outdoor direction. The indoor end portion of the middle plate portion 436 is connected to the middle portion of the indoor plate portion 434 in the vertical direction. The outdoor end portion of the middle plate portion 436 is connected to the middle portion of the outdoor plate portion 435 in the vertical direction. The middle plate portion 436 is provided at approximately the same height as the resin frame member mounting portion 438. The roller 400 of the inner sash 4 is provided between the indoor plate portion 434 and the outdoor plate portion 435. The middle plate portion 436 is formed with a hole portion 436a penetrating in the vertical direction. The roller 400 is arranged so as to penetrate the hole portion 436a of the middle plate portion 436. The roller 400 is placed on the inner rail 219 of the lower frame 2a. The upper end portion of the inner rail 219 is arranged between the indoor plate portion 434 and the outdoor plate portion 435.

[0047] A heat-foaming material 606 is provided on the underside of the middle plate 436 over the entire length of the middle plate 436. The heat-foaming material 606 is provided so as not to block the hole 436a of the middle plate 436 when not foamed. Both ends of the heat-foaming material 606 in the length direction are fixed to the middle plate 436 by fasteners 606a. The fasteners 606a are, for example, screws.

[0048] The frame protruding piece 437 protrudes from the lower end of the indoor panel 434 to the indoor side. That is, the frame protruding piece 437 protrudes from the main body 430 that supports the face material 42 to the indoor side. The frame protruding piece 437 has a protruding plate portion 437a and an end plate portion 437b. The protruding plate portion 437a protrudes from the lower end of the indoor panel 434 to the indoor side. The outdoor end of the protruding plate portion 437a, i.e., the base end, is disposed on the outdoor side of the indoor side surface of the face material 42. The end plate portion 437b protrudes downward from the indoor end of the protruding plate portion 437a. The end plate portion 437b is disposed on the indoor side of the indoor groove side panel portion 432. When the inner sash 4 is disposed in the closed position, the indoor side surface of the end plate portion 437b comes into contact with the frame airtight material 224 provided on the indoor panel portion 214 of the metal frame member 43.

[0049] As shown in FIG. 7, the resin frame member 44 is provided on the indoor side of the metal frame member 43. The resin frame member 44 has an indoor board portion 441, an outdoor board portion 442, a sight board portion 443, an upper board portion 444, a lower board portion 445, a middle board portion 446, a lower protruding portion 447, and a metal frame member mounting portion 448. The outdoor board portion 442 is disposed on the outdoor side of the lower side of the indoor board portion 441 with a gap therebetween. The sight board portion 443 is disposed on the outdoor side of the upper side of the indoor board portion 441 with a gap therebetween. The sight board portion 443 is disposed on the indoor side of the outdoor board portion 442. The lower end of the indoor board portion 441 is disposed above the lower end of the outdoor board portion 442. The upper end of the indoor board portion 441 and the upper end of the sight board portion 443 are disposed at the same height. The upper end of the outdoor plate portion 442 and the lower end of the observation plate portion 443 are disposed at the same height.

[0050] The upper plate portion 444 protrudes from the upper end of the indoor plate portion 441 to the outdoor side. The outdoor end of the upper plate portion 444 protrudes further to the outdoor side than the upper end of the facing plate portion 443. The outdoor end of the upper plate portion 444 is provided with a protruding piece 444a extending downward. The lower plate portion 445 protrudes from the lower end of the indoor plate portion 441 in an oblique direction gradually moving downward toward the outdoor side. The outdoor end of the lower plate portion 445 protrudes further to the outdoor side than the lower end of the outdoor plate portion 442. The lower end of the outdoor plate portion 442 is connected to a position that is closer to the indoor side than the outdoor end of the lower plate portion 445. The middle plate portion 446 protrudes from the middle portion of the indoor plate portion 441 in the up-down direction to the outdoor side. The outdoor end of the middle plate portion 446 is connected to the upper end of the outdoor plate portion 442. The lower end of the facing plate portion 443 is connected from above to the middle portion of the middle plate portion 446 in the indoor-outdoor direction. The lower protrusion 447 extends downward from the lower end of the outdoor board 442. The metal frame member attachment portion 448 is provided in the middle of the outdoor surface of the outdoor board 442 in the up-down direction.

[0051] The resin frame member 44 has a hollow portion 44a surrounded by an indoor plate portion 441, an outer plate portion 443, an upper plate portion 444, and a middle plate portion 446. The resin frame member 44 has a hollow portion 44b surrounded by the indoor plate portion 441, the outdoor plate portion 442, a lower plate portion 445, and a middle plate portion 446.

[0052] The resin frame member 44 is attached to the metal frame member 43 as follows. The facing plate portion 443 of the resin frame member 44 is positioned on the indoor side of the indoor groove side plate portion 432 of the metal frame member 43. The middle plate portion 446 of the resin frame member 44 is positioned below the groove bottom plate portion 431 of the metal frame member 43. The outdoor plate portion 442 of the metal frame member 43 is positioned on the indoor side of the indoor plate portion 434 of the metal frame member 43. The lower protruding portion 447 of the resin frame member 44 is positioned on top of the protruding plate portion 437a of the frame protruding piece 437.

[0053] The outdoor end and protruding piece 444a of the upper plate portion 444 of the resin frame member 44 are positioned on the outdoor side of the indoor gutter side plate portion 432 of the metal frame member 43. The upper end portion 432a of the indoor gutter side plate portion 432 is inserted into a recess 444b surrounded by the facing plate portion 443, the upper plate portion 444, and the protruding piece 444a of the resin frame member 44. The sealing material 324 provided on the indoor side of the lower edge portion of the face material 42 of the inner shoji 4 contacts the outdoor surface of the protruding piece 444a of the resin frame member 44, and does not contact the indoor gutter side plate portion 432 of the metal frame member 43. The sealing material 324 provided on the outdoor side of the lower edge portion of the face material 42 of the inner shoji 4 contacts the outdoor gutter side plate portion 433 of the metal frame member 43. The backup material 323 provided on the indoor side of the face material 42 and the backup material 323 provided on the outdoor side are both in contact with the metal frame member 43. A protruding portion that protrudes toward the indoor groove side panel portion 432 side of the metal frame member 43, i.e., toward the indoor side, may be provided at the lower end of the protruding piece 444a of the resin frame member 44.

[0054] The metal frame member mounting portion 448 of the resin frame member 44 is mounted to the resin frame member mounting portion 438 of the metal frame member 43. The lower end of the lower protrusion 447 contacts the indoor end of the protruding plate portion 437a of the frame protruding piece 437 from above. The indoor plate portion 441 is disposed on the indoor side of the indoor groove side plate portion 432 and the end plate portion 437b of the metal frame member 43. The outdoor plate portion 442 is disposed on the outdoor side of the indoor groove side plate portion 432 and the end plate portion 437b of the metal frame member 43.

[0055] Between the metal frame member 43 and the resin frame member 44, hollow portions 43b and 43c are formed.

[0056] As shown in FIG. 9, when a fire occurs, the heated foaming materials 602, 606 foam due to heat and close the space between the lower frame 2a and the lower frame 41a of the inner sash 4. The heated foaming material 602 is attached to the lower frame 2a. The heated foaming material 606 is attached to the lower frame 41a. The foamed heated foaming material 602 and the foamed heated foaming material 606 come into contact with each other. The foamed heated foaming material 602 closes the recess that opens upward and is surrounded by the upper plate portion 213, the indoor plate portion 214, the frame airtight material mounting portion 225, and the inner rail 219 of the metal frame member 43 of the lower frame 2a. The foamed heated foaming material 606 closes the internal space of the recess that is sandwiched between the indoor plate portion 434, the frame protruding piece 437, and the outdoor plate portion 435 on the lower side of the middle plate portion 436 of the lower frame 41a. In the event of a fire, the frame airtight material 224 that was in contact with the end plate portion 437b of the frame protruding piece 437 may melt and disappear. The heated foaming materials 602, 606 that have foamed close the lower end portion of the gap between the frame airtight material mounting portion 225 to which the frame airtight material 224 was attached and the end plate portion 437b of the frame protruding piece 437. This makes it possible to prevent the penetration of flames through the gap between the lower frame 2a and the upper frame 41b of the inner screen 4.

[0057] As shown in Figures 4 and 5, the upper frame 2b has a metal frame member 24 and a resin frame member 26. The metal frame member 24 and the resin frame member 26 extend in the width direction. The cross-sectional shapes of the metal frame member 24 and the resin frame member 26 are substantially the same throughout the width direction. The metal frame member 24 has an upper plate portion 241, an indoor plate portion 242, an outer rail 243, an intermediate rail 244, a screen rail 245, an indoor side frame protruding piece 246, and an outdoor side frame protruding piece 247.

[0058] As shown in Figures 10 and 11, the upper plate portion 241 is provided on the upper side of the upper frame 2b. The upper plate portion 241 has a first plate portion 241a, a second plate portion 241b, a third plate portion 241c, and a fourth plate portion 241d. The first plate portion 241a, the second plate portion 241b, the third plate portion 241c, and the fourth plate portion 241d are each a flat plate. The first plate portion 241a, the second plate portion 241b, the third plate portion 241c, and the fourth plate portion 241d are arranged in this order from the indoors to the outdoors.

[0059] Between adjacent plate parts, tapping holes 241e, 241f, and 241g are provided. The second plate part 241b is disposed between the tapping holes 241e and 241f. The indoor end of the second plate part 241b is connected to the upper end of the tapping hole 241e. The lower end of the tapping hole 241e is provided with a rib 241h protruding to the outdoor side. The rib 241h is disposed below the second plate part 241b with a gap therebetween. The outdoor end of the second plate part 241b is connected to the upper end of the tapping hole 241f. The lower end of the tapping hole 241f is provided with a rib 241i protruding to the indoor side. The third plate part 241c is disposed between the tapping holes 241f and 241g. The indoor end of the third plate part 241c is connected to the upper end of the tapping hole 241f. A rib 241j protruding to the outdoor side is provided at the lower end of the tapping hole 241f. The outdoor end of the third plate portion 241c is connected to the upper end of the tapping hole 241g. A rib 241k protruding to the indoor side is provided at the lower end of the tapping hole 241g.

[0060] As shown in FIG. 11, the heated foaming material 607 is provided on the lower surface of the second plate portion 241b. The heated foaming material 607 corresponds to the second heated foaming material. The heated foaming material 607 is provided over the entire length range in which the closed inner sash 4 is disposed on the lower surface of the second plate portion 241b. That is, the heated foaming material 607 is provided from approximately the center in the width direction of the upper frame 2b to the other side. The indoor end of the heated foaming material 607 is disposed in the gap between the second plate portion 241b and the rib 241h. The outdoor end of the heated foaming material 607 is disposed in the gap between the second plate portion 241b and the rib 241i. The heated foaming material 607 is fixed to the second plate portion 241b by crimping the rib 241h to the second plate portion 241b side.

[0061] As shown in FIG. 10, the heated foaming material 608 is provided on the lower surface of the third plate portion 241c. The heated foaming material 608 corresponds to the second heated foaming material. The heated foaming material 608 is provided over the entire length range in which the outer sash 3 in the closed state is disposed on the lower surface of the third plate portion 241c. That is, the heated foaming material 608 is provided on one side from the approximate center in the width direction of the upper frame 2b. The indoor end of the heated foaming material 608 is disposed in the gap between the third plate portion 241c and the rib 241j. The outdoor end of the heated foaming material 608 is disposed in the gap between the third plate portion 241c and the rib 241k. The heated foaming material 608 is fixed to the third plate portion 241c by crimping the rib 241j to the second plate portion 241b side.

[0062] As shown in FIG. 10 and FIG. 11, the screen rail 245 extends downward from the outdoor end of the upper plate 241. The outdoor frame protruding piece 247 protrudes upward from the outdoor end of the upper plate 241. The indoor plate 242 extends downward from the indoor end of the upper plate 241. A resin frame member mounting portion 250 for mounting the resin frame member 26 is provided at the vertical middle of the indoor surface of the indoor plate 242. A member mounting portion 252 for mounting the cover material 56 and the frame airtight material 251 is provided at the lower end of the indoor plate 242. As shown in FIG. 10, the indoor end of the cover material 56 is attached to the member mounting portion 252 in the length range in which the outer sash 3 in the closed state is arranged, that is, on one side of the center in the width direction of the upper frame 2b. The cover material 56 is made of resin. A hollow portion 56a is formed in the cover material 56. 11, a frame airtight material 251 is attached to the member attachment portion 252 over the length range in which the inner sash 4 in the closed state is arranged, i.e., on the other side of the center in the width direction of the upper frame 2b. The indoor frame protruding piece 246 protrudes upward from the indoor end of the upper plate portion 241.

[0063] The outer rail 243 extends downward from the indoor end of the fourth plate portion 241d of the upper plate portion 241. The middle rail 244 extends downward from the outdoor end of the second plate portion 241b of the upper plate portion 241. The lower end of the middle rail 244 is provided with a frame airtight material mounting portion 254 for mounting the frame airtight material 253. As shown in FIG. 10, the frame airtight material 253 is mounted to the frame airtight material mounting portion 254 in the length range in which the outer screen 3 in the closed state is arranged, that is, on one side of the center in the width direction of the upper frame 2b. The outdoor end of the cover material 56 is mounted to the lower end of the outer rail 243 in the length range in which the outer screen 3 in the closed state is arranged, that is, on one side of the center in the width direction of the upper frame 2b. As shown in FIG. 11, the frame airtight material 253 is not mounted to the frame airtight material mounting portion 254 in the length range in which the inner screen 4 in the closed state is arranged, that is, on the other side of the center in the width direction of the upper frame 2b. The frame airtight material 253 contacts the frame protruding piece 358 of the upper frame 31b of the outer screen 3. The indoor frame protruding piece 246 protrudes upward from the indoor end of the upper plate portion 241.

[0064] A heated foaming material 607 is provided between the indoor board portion 242 and the intermediate rail 244. A heated foaming material 608 is provided between the outer rail 243 and the intermediate rail 244.

[0065] The resin frame member 26 is provided on the indoor side of the indoor plate portion 242 of the metal frame member 24. The resin frame member 26 is attached to the lower end of the indoor plate portion 242 and the resin frame member attachment portion 250. The resin frame member 26 has a metal frame member fixing portion 261, an indoor protruding portion 262, and an outdoor protruding portion 263. The metal frame member fixing portion 261 is provided along the outdoor side surface of the indoor plate portion 242. The upper end of the metal frame member fixing portion 261 is attached to the resin frame member attachment portion 250 provided on the indoor side of the indoor plate portion 242. The indoor protruding portion 262 protrudes from the lower end of the metal frame member fixing portion 261 to the indoor side. The indoor protruding portion 262 is fixed to the window frame 16. For the window frame 16, refer to FIG. 1. The outdoor protruding portion 263 protrudes from the lower end of the metal frame member fixing portion 261 to the outdoor side. The outdoor protrusion 263 is disposed below the indoor board portion 242 of the metal frame member 24. The resin frame member 26 is in contact with the heat insulating material 17 provided in the building. For the heat insulating material 17, see FIG.

[0066] As shown in FIG. 10, the upper frame 31b of the outer screen 3 has a metal frame member 35 and a resin frame member 36. The metal frame member 35 and the resin frame member 36 extend in the width direction. The cross-sectional shapes of the metal frame member 35 and the resin frame member 36 are substantially the same throughout the width direction. The metal frame member 35 has a groove portion 35a into which the upper edge portion of the face material 32 is fitted. The metal frame member 35 has a groove bottom plate portion 351, an indoor groove side plate portion 352, an outdoor groove side plate portion 353, an indoor plate portion 354, an outdoor plate portion 355, a middle plate portion 356, an upper plate portion 357, a frame protruding piece 358, and a resin frame member mounting portion 359. The gutter bottom plate portion 351, the indoor gutter side plate portion 352, the outdoor gutter side plate portion 353, the indoor plate portion 354, the outdoor plate portion 355, the middle plate portion 356, the upper plate portion 357 and the resin frame member mounting portion 359 constitute the main body portion 350 that supports the panel 32.

[0067] The groove bottom plate portion 351 is provided at the bottom of the groove portion 35a. A step portion 351a is formed in the middle portion of the groove bottom plate portion 351 in the indoor / outdoor direction. The outdoor side of the step portion 351a is disposed higher than the indoor side. The indoor groove side plate portion 352 is provided on the indoor side of the groove portion 35a. The indoor groove side plate portion 352 extends downward from the indoor side end of the groove bottom plate portion 351. The outdoor groove side plate portion 353 is provided on the outdoor side of the groove portion 35a. The outdoor groove side plate portion 353 extends downward from the outdoor side end of the groove bottom plate portion 351. The groove bottom plate portion 351, the indoor groove side plate portion 352, and the outdoor groove side plate portion 353 form the groove portion 33a. The surface material 32 is disposed approximately in the center of the groove portion 35a in the indoor / outdoor direction.

[0068] The indoor plate portion 354 extends upward from the middle portion of the groove bottom plate portion 351 in the indoor / outdoor direction. The indoor plate portion 354 is disposed on the outdoor side of the indoor groove side plate portion 352. The indoor plate portion 354 is disposed slightly indoors of the indoor side surface of the facing material 32. The outdoor plate portion 355 extends upward from the outdoor end portion of the groove bottom plate portion 331. The outdoor plate portion 355 is provided on the upper side of the outdoor groove side plate portion 353. The upper end portion of the outdoor plate portion 355 is provided with a frame airtight material mounting portion 355b for mounting the frame airtight material 355a. The middle plate portion 356 protrudes upward from the middle portion of the groove bottom plate portion 351 in the indoor / outdoor direction. The middle plate portion 356 protrudes upward from the step portion 351a of the groove bottom plate portion 351. The middle plate portion 356 is provided between the indoor plate portion 354 and the outdoor plate portion 355. A frame airtight material attachment portion 356b to which a frame airtight material can be attached is provided at the upper end of the middle plate portion 356. The outer rail 243 of the upper frame 2b is disposed between the outdoor plate portion 355 and the middle plate portion 356. The outer rail 243 is in contact with the frame airtight material 355a attached to the outdoor plate portion 355.

[0069] The upper plate portion 357 protrudes from a position slightly lower than the upper end of the middle plate portion 356 toward the indoor side. The indoor end of the upper plate portion 357 is connected to the upper end of the indoor plate portion 354. The frame protruding piece 358 extends from the indoor end of the upper plate portion 357 toward the indoor side. That is, the frame protruding piece 358 protrudes from the main body portion 350 that supports the surface material 32 toward the indoor side. The frame protruding piece 358 has a protruding plate portion 358a that protrudes from the indoor end of the upper plate portion 357 toward the outdoor side, and an end plate portion 358b that protrudes upward from the outdoor end of the protruding plate portion 358a. The end plate portion 358b is in contact with the frame airtight material 253 provided on the intermediate rail 244 of the metal frame member 24 of the upper frame 2b from the outdoor side.

[0070] The upper surface of upper plate portion 357 and the upper surface of protruding plate portion 358a are disposed flush with each other. Heat foaming material 609 is provided on the upper surface of upper plate portion 357 and the upper surface of protruding plate portion 358a. Heat foaming material 609 corresponds to a first heat foaming material. Heat foaming material 609 is provided over the entire length direction of upper plate portion 357 and protruding plate portion 358a. Both end portions in the length direction of heat foaming material 609 are fixed to upper plate portion 357 by fasteners 609a. Fasteners 609a are, for example, screws.

[0071] The metal frame member 35 has a hollow portion 35b surrounded by a groove bottom plate portion 351, an indoor plate portion 354, a middle plate portion 356 and an upper plate portion 357.

[0072] The resin frame member 36 is provided on the indoor side of the metal frame member 35. The resin frame member 36 has an indoor plate portion 361, an outdoor plate portion 362, an upper plate portion 363, a lower plate portion 364, a middle plate portion 365, an upper protruding plate portion 366, and a metal frame member mounting portion 367. The indoor plate portion 361 and the outdoor plate portion 362 are each bent at their middle portions in the up-down direction. The indoor plate portion 361 has an indoor upper plate portion 361a, an indoor lower plate portion 361b, and an indoor middle plate portion 361c. The indoor upper plate portion 361a and the indoor lower plate portion 361b are formed in a flat plate shape. The indoor upper plate portion 361a and the indoor lower plate portion 361b have plate surfaces facing the indoor / outdoor direction. The indoor upper plate portion 361a is disposed above the indoor lower plate portion 361b and on the outdoor side. The lower end of the indoor upper plate 361a and the upper end of the indoor lower plate 361b are disposed at approximately the same height. The indoor middle plate 361c connects the lower end of the indoor upper plate 361a and the upper end of the indoor lower plate 361b. The outdoor plate 362 has an outdoor upper plate 362a, an outdoor lower plate 362b, and an outdoor middle plate 362c. The outdoor upper plate 362a and the outdoor lower plate 362b are formed in a flat plate shape. The outdoor upper plate 362a and the outdoor lower plate 362b have plate surfaces facing the indoor / outdoor direction. The outdoor upper plate 362a is disposed above the outdoor lower plate 362b and on the outdoor side. The lower end of the outdoor upper plate 362a and the upper end of the outdoor lower plate 362b are disposed at approximately the same height. The outdoor middle plate portion 362c connects the lower end of the outdoor upper plate portion 362a and the upper end of the outdoor lower plate portion 362b.

[0073] The upper plate portion 363 extends from the upper end of the indoor plate portion 361 to the outdoor side. The outdoor end of the upper plate portion 363 is disposed on the outdoor side of the upper end of the outdoor plate portion 362. The upper end of the outdoor plate portion 362 is connected to the middle portion of the upper plate portion 363 in the indoor / outdoor direction. The lower plate portion 364 protrudes from the lower end of the indoor plate portion 361 to the outdoor side. The outdoor end of the lower plate portion 364 protrudes from the lower end of the outdoor plate portion 362 to the outdoor side. The lower plate portion 364 is provided at the outdoor end of the lower plate portion 364 with a protruding piece 364a protruding upward. The middle plate portion 365 is provided between the indoor plate portion 361 and the outdoor plate portion 362. The middle plate portion 365 extends upward from the indoor end of the outdoor middle plate portion 362c. An upper end of the middle plate portion 365 is connected to an intermediate portion in the indoor / outdoor direction of the indoor middle plate portion 361c. The metal frame member attachment portion 367 is provided on the outdoor surface of the outdoor upper plate portion 362a.

[0074] The resin frame member 36 has a hollow portion 36a surrounded by the indoor upper plate portion 361a, the outdoor upper plate portion 362a, the upper plate portion 363, and the middle plate portion 365. The resin frame member 36 has a hollow portion 36b surrounded by the indoor upper plate portion 361a, the outdoor upper plate portion 362a, the lower plate portion 364, and the middle plate portion 365.

[0075] The resin frame member 36 is attached to the metal frame member 35 as follows. The outdoor lower plate portion 362b of the resin frame member 36 is positioned on the indoor side of the indoor groove side plate portion 352 of the metal frame member 35. The outdoor upper plate portion 362a of the resin frame member 36 is positioned on the indoor side of the indoor plate portion 354 of the metal frame member 33. The upper plate portion 363 of the resin frame member 36 is positioned below the frame protruding piece 358. The metal frame member mounting portion 367 of the resin frame member 36 is attached to the resin frame member mounting portion 359 of the metal frame member 35.

[0076] The outdoor end and protruding piece 364a of the lower plate portion 364 of the resin frame member 36 are positioned on the outdoor side of the indoor gutter side plate portion 352 of the metal frame member 35. The lower end portion 352a of the indoor gutter side plate portion 352 is inserted into a recess 364b surrounded by the outdoor lower plate portion 362b, the lower plate portion 364, and the protruding piece 364a of the resin frame member 36. The sealing material 324 provided on the indoor side of the upper edge portion of the face material 32 of the outer sash 3 contacts the outdoor surface of the protruding piece 364a of the resin frame member 36, and does not contact the indoor gutter side plate portion 352 of the metal frame member 35. The sealing material 324 provided on the outdoor side of the upper edge portion of the face material 32 of the outer sash 3 contacts the outdoor gutter side plate portion 353 of the metal frame member 35. The backup material 323 provided on the indoor side of the face material 32 and the backup material 323 provided on the outdoor side are both in contact with the metal frame member 35 .

[0077] Between the metal frame member 35 and the resin frame member 36, hollow portions 35b, 35c, and 35d are formed.

[0078] The hollow portion 36a of the resin frame member 36 is disposed vertically below the frame protruding piece 358 of the metal frame member 35. That is, the frame protruding piece 358 and the hollow portion 36a of the resin frame member 36 are disposed overlapping each other along the front direction. The frame protruding piece 338 is disposed outside the hollow portion 36b of the resin frame member 36 in the front direction.

[0079] The frame protruding piece 358 protruding from the main body 350 of the metal frame member 35 to the indoor side comes into contact with the frame airtight material 253 provided on the metal frame member 24 of the upper frame 2b. Compared to the case where the main body 350 of the metal frame member 35 comes into direct contact with the frame airtight material 253, the main body 350 of the metal frame member 35 can be positioned on the outdoor side. This makes it possible to secure a large space for installing the resin frame member 36 on the indoor side of the main body 350 of the metal frame member 35. This makes it possible to enlarge the hollow portion 36a of the resin frame member 36. As a result, the thermal insulation performance of the fitting 1 can be improved.

[0080] The frame protruding piece 358 is disposed on the outer side of the hollow portion 36a in the front direction. With this configuration, the hollow portion 36a of the resin frame member 36 can be made large.

[0081] As shown in FIG. 12, when a fire occurs, the heated foaming materials 608, 609 foam due to heat, and seal the space between the upper frame 2b and the upper frame 31b of the outer screen 3. The heated foaming material 608 is attached to the upper frame 2b. The heated foaming material 609 is attached to the upper frame 31b. The foamed heated foaming material 608 and the heated foaming material 609 come into contact with each other. The foamed heated foaming materials 608, 609 seal the space surrounded by the upper plate portion 241 of the upper frame 2b, the outer rail 243, the upper plate portion 357 of the upper frame 41b, and the frame protruding piece 358. In the event of a fire, the frame airtight material 253 that was in contact with the end plate portion 358b of the frame protruding piece 358 may melt and disappear. The heated foaming materials 608, 609 that have expanded close the gap between the frame airtight material mounting portion 254 at the lower end of the intermediate rail 244 to which the frame airtight material 253 was attached and the end plate portion 358b of the stile protruding piece 358. This makes it possible to prevent the penetration of flames through the gap between the upper frame 2b and the upper stile 31b of the outer slat 3.

[0082] As shown in Figures 10 and 11, the upper frame 41b of the inner screen 4 has a metal frame member 45 and a resin frame member 46. The metal frame member 45 and the resin frame member 46 extend in the width direction. The cross-sectional shapes of the metal frame member 45 and the resin frame member 46 are substantially the same throughout the width direction. The metal frame member 45 has a groove portion 45a into which the upper edge portion of the face material 42 is fitted. The metal frame member 45 has a groove bottom plate portion 451, an indoor groove side plate portion 452, an outdoor groove side plate portion 453, an indoor plate portion 454, an outdoor plate portion 455, an upper plate portion 456, and a frame protruding piece 457. The gutter bottom plate portion 451, the indoor gutter side plate portion 452, the outdoor gutter side plate portion 453, the indoor plate portion 454, the outdoor plate portion 455, the upper plate portion 456 and the resin frame member mounting portion 458 constitute the main body portion 450 that supports the panel 42.

[0083] The groove bottom plate portion 451 is provided at the bottom of the groove portion 45a. The indoor groove side plate portion 452 is provided on the indoor side of the groove portion 45a. The indoor groove side plate portion 452 extends downward from the indoor end of the groove bottom plate portion 451. The outdoor groove side plate portion 453 is provided on the outdoor side of the groove portion 45a. The outdoor groove side plate portion 453 extends downward from the outdoor end of the groove bottom plate portion 451. The groove bottom plate portion 451, the indoor groove side plate portion 452 and the outdoor groove side plate portion 453 form the groove portion 45a. The surface material 42 is disposed approximately in the center of the groove portion 45a in the indoor / outdoor direction.

[0084] The indoor plate portion 454 extends upward from the middle portion in the indoor / outdoor direction of the groove bottom plate portion 451. The indoor plate portion 454 is disposed on the outdoor side of the indoor groove side plate portion 452. The indoor plate portion 454 is disposed on the outdoor side of the indoor surface of the facing material 42. The outdoor plate portion 455 extends upward from the outdoor end portion of the groove bottom plate portion 431. The outdoor plate portion 455 is provided above the outdoor groove side plate portion 453. The intermediate rail 244 is disposed on the outdoor side of the outdoor plate portion 455.

[0085] The upper plate portion 456 protrudes from the indoor side slightly below the upper end of the outdoor plate portion 455. The indoor end of the upper plate portion 456 is connected to the upper end of the indoor plate portion 454. The frame protruding piece 457 extends from the indoor end of the upper plate portion 456 to the indoor side. That is, the frame protruding piece 457 protrudes from the main body portion 450 that supports the surface material 42 to the indoor side. The frame protruding piece 457 has a protruding plate portion 457a that protrudes from the indoor end of the upper plate portion 456 to the outdoor side, and an end plate portion 457b that protrudes upward from the outdoor end of the protruding plate portion 457a. When the inner sash 4 is placed in the closed position, the end plate portion 457b contacts the frame airtight material 251 provided on the indoor plate portion 242 of the upper frame 2b from the outdoor side.

[0086] The upper surface of upper plate portion 456 and the upper surface of protruding plate portion 457a are provided flush with each other. Heat foaming material 610 is provided on the upper surface of upper plate portion 456 and the upper surface of protruding plate portion 457a. Heat foaming material 610 corresponds to a first heat foaming material. Heat foaming material 610 is provided over the entire length direction of upper plate portion 456 and protruding plate portion 457a. Both end portions in the length direction of heat foaming material 610 are fixed to upper plate portion 456 by fasteners 610a. Fasteners 610a are, for example, screws.

[0087] In the metal frame member 45, a hollow portion 45b surrounded by a groove bottom plate portion 451, an indoor plate portion 454, an outdoor plate portion 455 and an upper plate portion 456 is formed.

[0088] The resin frame member 46 is provided on the indoor side of the metal frame member 45. The resin frame member 46 has a lower indoor plate portion 461, a lower outdoor plate portion 462, a lower plate portion 463, a middle plate portion 464, an upper indoor plate portion 465, an upper outdoor plate portion 466, an upper plate portion 467, and a metal frame member mounting portion 468. The lower indoor plate portion 461 is provided on the outdoor side of the lower side of the resin frame member 46. The lower plate portion 463 extends from the lower end portion of the lower indoor plate portion 461 to the outdoor side. A protruding piece 463a protruding upward is provided at the outdoor end portion of the lower plate portion 463. The middle plate portion 464 extends from the upper end portion of the lower indoor plate portion 461 to the outdoor side. The middle plate portion 464 protrudes further to the outdoor side than the lower plate portion 463. The lower outdoor plate portion 462 is provided on the outdoor side of the lower indoor plate portion 461 with a gap therebetween. The lower indoor plate portion 461 extends upward from the vertical middle portion of the lower plate portion 463. The upper end portion of the lower indoor plate portion 461 is connected to the middle portion of the middle plate portion 464 in the indoor / outdoor direction. The upper outdoor plate portion 466 extends upward from the outdoor end portion of the middle plate portion 464. The upper indoor plate portion 465 extends upward from the middle portion of the middle plate portion 464 in the indoor / outdoor direction. The upper indoor plate portion 465 is disposed on the outdoor side of the lower outdoor plate portion 462. The upper end portion of the upper indoor plate portion 465 is disposed slightly above the upper end portion of the upper outdoor plate portion 466. The upper plate portion 467 extends to the outdoor side from slightly below the upper end portion of the upper indoor plate portion 465. The outdoor end of the upper plate portion 467 is disposed closer to the outdoors than the upper outdoor plate portion 466. The upper end of the upper outdoor plate portion 466 is connected to the middle portion in the indoor / outdoor direction of the upper plate portion 467. The metal frame member attachment portion 468 is provided on the outdoor surface of the upper outdoor plate portion 466.

[0089] The resin frame member 46 has a hollow portion 46a surrounded by a lower indoor plate portion 461, a lower outdoor plate portion 462, a lower plate portion 463, and a middle plate portion 464. The resin frame member 46 has a hollow portion 46b surrounded by the middle plate portion 464, an upper indoor plate portion 465, an upper outdoor plate portion 466, and an upper plate portion 467.

[0090] The resin frame member 46 is attached to the metal frame member 45 as follows. The lower outdoor plate portion 462 of the resin frame member 46 is positioned on the indoor side of the indoor groove side plate portion 452 of the metal frame member 45. The upper outdoor plate portion 466 of the resin frame member 46 is positioned on the indoor side of the indoor plate portion 454 of the metal frame member 43. The upper plate portion 467 of the resin frame member 46 is positioned below the frame protruding piece 457 of the metal frame member 45. The upper end portion of the upper outdoor plate portion 466 of the resin frame member 46 contacts the lower surface of the protruding plate portion 457a of the frame protruding piece 457. The outdoor end portion of the upper plate portion 467 of the resin frame member 46 contacts the indoor surface of the indoor plate portion 454 of the metal frame member 45. The metal frame member mounting portion 468 of the resin frame member 46 is attached to the resin frame member mounting portion 458 of the metal frame member 45.

[0091] The outdoor end and protruding piece 463a of the lower plate portion 463 of the resin frame member 46 are positioned on the outdoor side of the indoor gutter side plate portion 452 of the metal frame member 45. The lower end portion 452a of the indoor gutter side plate portion 452 is inserted into a recess 463b surrounded by the lower outdoor plate portion 462, the lower plate portion 463, and the protruding piece 463a of the resin frame member 46. The sealing material 324 provided on the indoor side of the upper edge portion of the face material 42 of the inner shoji 4 contacts the outdoor surface of the protruding piece 463a of the resin frame member 46, and does not contact the indoor gutter side plate portion 452 of the metal frame member 45. The sealing material 324 provided on the outdoor side of the upper edge portion of the face material 42 of the inner shoji 4 contacts the outdoor gutter side plate portion 453 of the metal frame member 45. The backup material 323 provided on the indoor side of the face material 42 and the backup material 323 provided on the outdoor side are both in contact with the metal frame member 45 .

[0092] Between the metal frame member 45 and the resin frame member 46, hollow portions 45c, 45d, and 45e are formed.

[0093] The hollow portion 46b of the resin frame member 46 is disposed vertically below the frame protruding piece 457 of the metal frame member 45. That is, the frame protruding piece 457 and the hollow portion 46b of the resin frame member 46 are disposed overlapping along the front direction. The frame protruding piece 457 is disposed outside the hollow portion 46b of the resin frame member 46 in the front direction.

[0094] As shown in FIG. 13, when a fire occurs, the heated foaming materials 607, 610 foam due to heat, and seal the space between the upper frame 2b and the upper frame 41b of the inner screen 4. The heated foaming material 607 is attached to the upper frame 2b. The heated foaming material 610 is attached to the upper frame 41b. The foamed heated foaming material 607 and the heated foaming material 610 come into contact with each other. The foamed heated foaming materials 607, 610 seal the space surrounded by the upper plate portion 241 of the upper frame 2b, the indoor plate portion 242, the upper plate portion 456 of the upper frame 31b, and the frame protruding piece 457. In the event of a fire, the frame airtight material 251 that was in contact with the end plate portion 457b of the frame protruding piece 457 may melt and disappear. The heated foaming materials 607, 610 that have been foamed close the gap between the member mounting portion 252 at the lower end of the indoor panel portion 242 to which the frame airtight material 251 was attached and the end panel portion 457b of the frame protruding piece 457. This makes it possible to prevent the penetration of flames through the gap between the upper frame 2b and the upper frame 41b of the inner screen 4.

[0095] As shown in FIG. 14, the first vertical frame 2c has a metal frame member 27 and a resin frame member 28. The metal frame member 27 has an indoor board portion 271, an outdoor board portion 272, an outer board portion 273, a first sight board portion 274, and a second sight board portion 275. The indoor board portion 271 is provided at the indoor end portion. A resin frame member attachment portion 271a for attaching the resin frame member 28 is provided on the indoor surface of the indoor board portion 271. The outdoor board portion 272 is provided at the outdoor end portion. The outer board portion 273 is provided between the indoor board portion 271 and the outdoor board portion 272. The indoor end portion of the outer board portion 273 is connected to the middle portion of the indoor board portion 271 in the width direction. The outdoor end portion of the outer board portion 273 is connected to the middle portion of the outdoor board portion 272 in the width direction. The first and second sight boards 274 and 275 protrude inward in the width direction from the middle of the outer board 273 in the indoor / outdoor direction. The first sight board 274 is disposed on the indoor side of the second sight board 275 with a gap between them. The tip of the second sight board 275, i.e., the inner end in the width direction, is provided with a frame airtight material attachment portion 277 to which a frame airtight material 276 is attached. The frame airtight material 276 comes into contact with the door end frame 31c of the outer sash 3.

[0096] A heat foaming material 611 is provided on the outer side in the width direction of the frame airtight material mounting portion 277 in the second sight plate portion 275, i.e., on the outdoor side surface of the base end side. The heat foaming material 611 is provided over the entire length direction of the second sight plate portion 275, i.e., the entire vertical direction. The upper and lower ends of the heat foaming material 611 are fixed by fasteners 611a. The fasteners 611a are, for example, pressing members attached to the outer plate portion 273 with screws 611b to press the heat foaming material 611 against the second sight plate portion 275.

[0097] The resin frame member 28 is provided on the indoor side of the indoor plate portion 271 of the metal frame member 27. The resin frame member 28 is attached to the inner end in the width direction of the indoor plate portion 271 and the resin frame member attachment portion 271a. The resin frame member 28 has a metal frame member fixing portion 281, an indoor protruding portion 282, and an outdoor protruding portion 283. The metal frame member fixing portion 281 is provided along the outdoor side surface of the indoor plate portion 271. The outer end in the width direction of the metal frame member fixing portion 281 is attached to the resin frame member attachment portion 271a provided on the indoor side of the indoor plate portion 271. The indoor protruding portion 282 protrudes from the inner end in the width direction of the metal frame member fixing portion 281 to the indoor side. The indoor protruding portion 282 is fixed to the window frame 16. For the window frame 16, refer to FIG. 2. The outdoor protrusion 283 protrudes to the outdoor side from the upper end of the metal frame member fixing part 281. The outdoor protrusion 283 is arranged on the inside in the width direction of the indoor board part 271. The outdoor side end of the outdoor protrusion 283 protrudes to the outdoor side further than the indoor board part 271. The resin frame member 28 is in contact with the heat insulating material 17 provided in the building. For the heat insulating material 17, refer to FIG. 2.

[0098] A resin cover material 57 is provided between the indoor plate portion 271 and the second visible plate portion 275 of the metal frame member 27. The indoor end of the resin cover material 57 contacts the outdoor end of the outdoor protrusion portion 283 of the resin frame member 28. A protruding piece 571 that protrudes to the outdoor side is provided at the outdoor end of the resin cover material 57. The protruding piece 571 contacts the resin frame member 38 of the door end frame 31c of the outer sash 3 in the closed state. The resin cover material 57 is provided with hollow portions 57a and 57b. Hollow portions 57c, 57d, and 57e are provided between the resin cover material 57 and the metal frame member 27.

[0099] The door end frame 31c of the outer sash 3 has a metal frame member 37 and a resin frame member 38. The metal frame member 37 and the resin frame member 38 extend in the vertical direction. The cross-sectional shapes of the metal frame member 37 and the resin frame member 38 are substantially the same throughout the vertical direction. The resin frame member 38 is provided on the indoor side of the metal frame member 37. The metal frame member 37 has a groove portion 37a into which the side edge portion of the facing material 32 is fitted. The metal frame member 37 has a groove bottom plate portion 371, an indoor groove side plate portion 372, an outdoor groove side plate portion 373, an indoor plate portion 374, an outdoor plate portion 375, a middle plate portion 376, an indoor side outer plate portion 377, an outdoor side outer plate portion 378, and a frame protruding piece 379. The gutter bottom plate portion 371, the indoor gutter side plate portion 372, the outdoor gutter side plate portion 373, the indoor plate portion 374, the outdoor plate portion 375, the middle plate portion 376, the indoor side outer plate portion 377 and the outdoor side outer plate portion 378 form the main body portion 370 which supports the panel 32.

[0100] The indoor gutter side plate 372 is provided on the indoor side of the gutter 37a. The outdoor gutter side plate 373 is provided on the outdoor side of the gutter 37a. The gutter bottom plate 371 is provided at the bottom of the gutter 37a. The indoor edge of the gutter bottom plate 371 is connected to the outer edge in the width direction of the indoor gutter side plate 372. The gutter bottom plate 371, the indoor gutter side plate 372, and the outdoor gutter side plate 373 form the gutter 37a. The face material 32 is disposed approximately in the center of the gutter 37a in the indoor / outdoor direction.

[0101] The indoor plate portion 374 extends from the middle portion of the groove bottom plate portion 371 in the indoor / outdoor direction to the outside in the width direction. The indoor plate portion 374 is disposed on the outdoor side of the indoor groove side plate portion 372. The indoor plate portion 374 is disposed on the indoor side of the indoor surface of the facing material 32. The outdoor plate portion 375 extends from the end portion of the outdoor side of the groove bottom plate portion 371 to the outside in the width direction. A rib 375a protruding to the indoor side is provided at the middle portion of the width direction of the outdoor plate portion 375. The outside of the width direction of the rib 375a of the outdoor plate portion 375, i.e., the tip side, is inclined so as to face the indoor side toward the outside in the width direction. A heating foaming material 612 is provided on the indoor side surface of the outdoor plate portion 375 outside the width direction of the rib 375a. The heating foaming material 612 is provided over the entire vertical direction of the outdoor plate portion 375. The heat-foamed material 612 is fixed to the outdoor plate portion 375 by caulking the ribs 375 a to the outdoor plate portion 375 side.

[0102] The middle plate portion 376 extends from a position on the outdoor side of the indoor plate portion 374 at the middle portion of the width direction of the groove bottom plate portion 371 to the outside in the width direction. The middle plate portion 376 is disposed at a position facing the outdoor plate portion 375 in the indoor-outdoor direction. A rib 376a protruding to the outdoor side is provided at the middle portion of the width direction of the middle plate portion 376. The outer side of the width direction of the rib 376a of the middle plate portion 376, i.e., the tip side, is inclined toward the outdoor side toward the outside in the width direction. A heat foaming material 613 is provided on the outdoor side surface of the middle plate portion 376 on the outer side of the width direction of the rib 376a. The heat foaming material 613 is provided over the entire upper and lower portions of the middle plate portion 376. The heat foaming material 613 is fixed to the middle plate portion 376 by crimping the rib 376a to the middle plate portion 376 side. The heated foaming material 613 is disposed at a position facing the heated foaming material 612 provided on the outdoor board portion 375 in the indoor / outdoor direction.

[0103] The outdoor-side outer plate portion 378 is provided between the outdoor plate portion 375 and the middle plate portion 376. The indoor-side end of the outdoor-side outer plate portion 378 is connected to the middle portion in the width direction of the middle plate portion 376. The outdoor-side end of the outdoor-side outer plate portion 378 is connected to the middle portion in the width direction of the outdoor plate portion 375. The outdoor-side outer plate portion 378 is disposed on the inner side in the width direction of the rib 375a of the outdoor plate portion 375 and the rib 376a of the middle plate portion 376. That is, the outdoor-side outer plate portion 378 is disposed on the inner side in the width direction of the heat-foamed material 612 attached to the outdoor plate portion 375 and the heat-foamed material 613 attached to the middle plate portion 376. When the outer screen 3 is placed in the closed position, the first sight panel portion 274 of the first vertical frame 2c is placed between the part of the middle panel portion 376 that is outboard of the outdoor side outer panel portion 378 in the width direction and the part of the outdoor panel portion 375 that is outboard of the outdoor side outer panel portion 378 in the width direction. The outdoor side outer panel portion 378 has a screen assembly hole, a door roller adjustment hole, and an air introduction hole that penetrate the panel surface.

[0104] The indoor side exterior plate portion 377 is provided between the indoor side plate portion 374 and the middle plate portion 376. An indoor side end portion of the indoor side exterior plate portion 377 is connected to an outer end portion in the width direction of the indoor plate portion 374. An outdoor side end portion of the indoor side exterior plate portion 377 is connected to a middle portion in the width direction of the middle plate portion 376. The outdoor side exterior plate portion 378 is disposed inside the indoor side exterior plate portion 377 in the width direction.

[0105] The frame protruding piece 379 protrudes indoors from the outer end in the width direction of the indoor panel 374. In other words, the frame protruding piece 379 protrudes indoors from the main body 370 that supports the face material 32. The frame protruding piece 379 has a protruding plate portion 379a that protrudes indoors from the indoor panel 374, and an end plate portion 379b that extends outward in the width direction from the indoor tip of the protruding plate portion. When the outer sash 3 is placed in the closed position, the indoor surface of the end plate portion 379b comes into contact with the frame airtight material 276 provided on the first vertical frame 2c.

[0106] The metal frame member 37 has a hollow portion 37b surrounded by a groove bottom plate portion 371, an indoor plate portion 374, a middle plate portion 376, and an indoor side outer plate portion 377. The metal frame member 37 has a hollow portion 37c surrounded by the groove bottom plate portion 371, an outdoor plate portion 375, a middle plate portion 376, and an indoor side outer plate portion 377.

[0107] The resin frame member 38 has an indoor plate portion 381, an outdoor plate portion 382, ​​a middle sight plate portion 383, an inner plate portion 384, an outer plate portion 385, a first middle sight plate portion 386, and a second middle sight plate portion 387. The outdoor plate portion 382 is provided on the outdoor side of the resin frame member 38 and on the outside in the width direction. The outer plate portion 385 extends from the outer end of the width direction of the outdoor plate portion 382 to the indoor side. The second middle sight plate portion 387 extends from the inner end of the width direction of the outdoor plate portion 382 to the indoor side. The middle sight plate portion 383 extends from the indoor end of the outer plate portion 385 to the inside in the width direction. The indoor end of the outer plate portion 385 is connected to the indoor end of the second middle sight plate portion 387. The first middle sight plate portion 386 extends from a middle portion in the width direction of the middle sight plate portion 383 toward the indoor side. The indoor plate portion 381 extends from an indoor end portion of the middle sight plate portion 383 toward the inside in the width direction.

[0108] The inner plate portion 384 extends from the inside end of the indoor plate portion 381 in the width direction to the outdoor side. A protruding piece 384a protruding outward in the width direction is provided at the outdoor end of the inner plate portion 384. At the corner between the indoor plate portion 381 and the inner plate portion 384, a corner plate portion 381a is provided that extends from the indoor plate portion 381 to the outdoor side and bends toward the inside in the width direction to connect with the inner plate portion 384.

[0109] The resin frame member 38 has a hollow portion 38a surrounded by an outdoor plate portion 382, ​​a middle visible plate portion 383, an outer plate portion 385, and a second middle visible plate portion 387. The resin frame member 38 has a hollow portion 38b surrounded by an indoor plate portion 381, an inner plate portion 384, and an angular plate portion 381a.

[0110] The resin frame member 38 is attached to the metal frame member 37 as follows. The outdoor plate portion 382, ​​intermediate visible plate portion 383, outer plate portion 385, and second intermediate visible plate portion 387 of the resin frame member 38 are arranged in a recess surrounded by the groove bottom plate portion 371, indoor plate portion 374, and frame protruding piece 379 of the metal frame member 37. The outdoor plate portion 382 of the resin frame member 38 is arranged along the indoor side of the indoor plate portion 374 of the metal frame member 37. The indoor plate portion 381 of the resin frame member 38 is arranged at a distance from the indoor side of the indoor groove side plate portion 372 of the metal frame member 37.

[0111] The outdoor end and protruding piece 384a of the inner plate portion 384 of the resin frame member 38 are positioned on the outdoor side of the indoor gutter side plate portion 372 of the metal frame member 37. The inner end 372a in the width direction of the indoor gutter side plate portion 372 is inserted into a recess 384b surrounded by the inner plate portion 384, protruding piece 384a and corner plate portion 381a of the resin frame member 38. The sealant 324 provided on the indoor side of the edge portion on one side in the width direction of the face material 32 of the outer shoji 3 contacts the outdoor surface of the protruding piece 384a of the resin frame member 38 and does not contact the indoor gutter side plate portion 372 of the metal frame member 37. The sealant 324 provided on the outdoor side of the edge portion on one side in the width direction of the face material 32 of the outer shoji 3 contacts the outdoor gutter side plate portion 373 of the metal frame member 37. The backup material 323 provided on the indoor side of the face material 32 and the backup material 323 provided on the outdoor side are both in contact with the metal frame member 37 .

[0112] Between the metal frame member 37 and the resin frame member 38, hollow portions 37d and 37e are formed.

[0113] The hollow portion 38a of the resin frame member 38 is disposed on the inside in the width direction of the frame protruding piece 379 of the metal frame member 37. That is, the frame protruding piece 379 and the hollow portion 38a of the resin frame member 38 are disposed overlapping along the front direction. The frame protruding piece 379 is disposed on the outside of the hollow portion 38a of the resin frame member 38 in the front direction.

[0114] The frame protruding piece 379 protruding from the main body 370 of the metal frame member 37 to the indoor side comes into contact with the frame airtight material 276 provided on the metal frame member 27 of the first vertical frame 2c. Compared to the case where the main body 370 of the metal frame member 37 comes into direct contact with the frame airtight material 276, the main body 370 of the metal frame member 37 can be positioned on the outdoor side. This makes it possible to secure a large space for installing the resin frame member 38 on the indoor side of the main body 370 of the metal frame member 37. This makes it possible to enlarge the hollow portion 38a of the resin frame member 38. As a result, the thermal insulation performance of the fitting 1 can be improved.

[0115] The frame protruding piece 379 is disposed on the outside of the hollow portion 38a in the view direction. The outdoor end of the frame protruding piece 379 is connected to the frame protruding piece 370 at a position on the outdoor side of the indoor surface of the panel 32. With this configuration, the hollow portion 38a of the resin frame member 38 can be made larger.

[0116] As shown in FIG. 15, when a fire occurs, the heated foaming materials 611, 612, and 613 foam due to heat and close the space between the first vertical frame 2c and the door end frame 31c of the outer sash 3. The heated foaming material 611 is attached to the first vertical frame 2c. The heated foaming materials 612 and 613 are attached to the door end frame 31c. The foamed heated foaming materials 611, 612, and 613 are integrated. The foamed heated foaming material 611 closes the space surrounded by the outer plate portion 273 of the first vertical frame 2c, the second facing plate portion 275, the frame airtight material mounting portion 277, and the frame protruding piece 379 of the door end frame 31c. In the event of a fire, the frame airtight material 276 that was in contact with the end plate portion 379b of the frame protruding piece 379 may melt and disappear. The foamed heated foaming material 611 closes the gap between the frame airtight material mounting portion 277 to which the frame airtight material 276 was attached and the end plate portion 379b of the stile protruding piece 379. This prevents flames from penetrating through the gap between the first vertical frame 2c and the door end frame 31c of the outer door 3. The foamed heated foaming materials 612, 613 close the space between the outer plate portion 273 of the first vertical frame 2c and the outdoor side outer plate portion 378 of the door end frame 31c. The foamed heated foaming materials 612, 613 are provided to close the holes 378a formed in the outdoor side outer plate portion 378, such as the door assembly hole, the door roller adjustment hole, and the air introduction hole.

[0117] As shown in FIG. 16, the second vertical frame 2d of the frame body 2 has a metal frame member 29 and a resin frame member 30. The metal frame member 29 has an indoor board portion 291, an outdoor board portion 292, an outer board portion 293, a first sight board portion 294, and a second sight board portion 295. The indoor board portion 291 is provided at the indoor end portion. The outdoor board portion 292 is provided at the outdoor end portion. The outer board portion 293 is provided between the indoor board portion 291 and the outdoor board portion 292. The indoor end portion of the outer board portion 293 is connected to the middle portion in the width direction of the indoor board portion 291. The outdoor end portion of the outer board portion 293 is connected to the middle portion in the width direction of the outdoor board portion 292. The first sight board portion 294 and the second sight board portion 295 protrude inward in the width direction from the middle portion in the indoor / outdoor direction of the outer board portion 293. The first sight panel portion 294 is disposed on the indoor side of the second sight panel portion 295 with a gap therebetween. A frame airtight material mounting portion 297 to which a frame airtight material 296 is attached is provided at the inner end portion in the width direction of the indoor panel portion 291, i.e., the tip portion. The frame airtight material 296 contacts the door end frame 41c of the inner sash 4. A resin frame member mounting portion 291a to which a resin frame member 30 is attached is provided at the middle portion in the width direction on the indoor side of the indoor panel portion 291.

[0118] A heated foaming material 614 is provided on the widthwise outer side of the frame airtight material mounting portion 297 of the indoor board portion 291, i.e., on the outdoor surface on the base end side. The heated foaming material 614 is provided along the length of the indoor board portion 291, i.e., over the entire vertical direction. The upper and lower ends of the heated foaming material 614 are fixed by fasteners 614a. The fasteners 614a are, for example, pressing members attached to the outer board portion 293 with screws 614b to press the heated foaming material 614 against the indoor board portion 291.

[0119] The resin frame member 30 is provided on the indoor side of the indoor plate portion 291 of the metal frame member 29. The resin frame member 30 is attached to the inner end in the width direction of the indoor plate portion 291 and the resin frame member attachment portion 291a. The resin frame member 30 has a metal frame member fixing portion 301, an indoor protruding portion 302, and an outdoor protruding portion 303. The metal frame member fixing portion 301 is provided along the outdoor surface of the indoor plate portion 291. The outer end in the width direction of the metal frame member fixing portion 301 is attached to the resin frame member attachment portion 291a provided on the indoor side of the indoor plate portion 291. The indoor protruding portion 302 protrudes from the inner end in the width direction of the metal frame member fixing portion 301 to the indoor side. The indoor protruding portion 302 is fixed to the window frame 16. For the window frame 16, refer to FIG. 2. The outdoor protruding portion 303 protrudes from the upper end of the metal frame member fixing portion 301 to the outdoor side. The outdoor protrusion 303 is disposed on the inside in the width direction of the indoor board portion 291. The outdoor end of the outdoor protrusion 303 protrudes further toward the outdoor side than the indoor board portion 291. The resin frame member 30 is in contact with a heat insulating material 17 provided in the building. For the heat insulating material 17, see FIG. 2.

[0120] The door end frame 41c of the inner sash 4 has a metal frame member 47 and a resin frame member 48. The resin frame member 48 is provided on the outdoor side of the metal frame member 47. The metal frame member 47 has a groove portion 47a into which the side edge portion of the face material 42 is fitted. The metal frame member 47 has a groove bottom plate portion 471, an indoor groove side plate portion 472, an outdoor groove side plate portion 473, an indoor plate portion 474, an outdoor plate portion 475, an outer plate portion 476, and a frame protruding piece 477. The groove bottom plate portion 471, the indoor groove side plate portion 472, the outdoor groove side plate portion 473, the indoor plate portion 474, the outdoor plate portion 475, and the outer plate portion 476 form a main body portion 470 that supports the face material 42.

[0121] The indoor gutter side plate portion 472 is provided on the indoor side of the gutter portion 47a. The outdoor gutter side plate portion 473 is provided on the outdoor side of the gutter portion 47a. The gutter bottom plate portion 471 is provided at the bottom of the gutter portion 47a. The indoor side edge portion of the gutter bottom plate portion 471 is connected to the widthwise outer edge portion of the indoor gutter side plate portion 472. The indoor plate portion 474 extends from the middle portion of the gutter bottom plate portion 471 in the indoor / outdoor direction to the outside in the width direction. The indoor plate portion 474 is disposed on the outdoor side of the indoor gutter side plate portion 472. The indoor plate portion 474 is disposed on the outdoor side of the indoor side surface of the facing material 42.

[0122] The outdoor plate portion 475 extends outward in the width direction from the outdoor end of the outdoor groove side plate portion 473. A rib 475a protruding toward the indoor side is provided at the middle portion of the width direction of the outdoor plate portion 475. The outer side of the width direction of the outdoor plate portion 475 from the rib 475a, i.e., the tip side, of the outdoor plate portion 475 is inclined toward the indoor side toward the outer side in the width direction. A heat foaming material 615 is provided on the indoor side surface of the outdoor plate portion 475 outside the width direction of the rib 475a. The heat foaming material 614 is provided over the entire outdoor plate portion 475 in the vertical direction. The heat foaming material 615 is fixed to the outdoor plate portion 475 by crimping the rib 475a to the outdoor plate portion 475 side.

[0123] The outer plate portion 476 is provided between the indoor plate portion 474 and the outdoor plate portion 475. The indoor end of the outer plate portion 476 is connected to the vicinity of the outer end of the indoor plate portion 474 in the width direction. The outer end of the indoor plate portion 474 in the width direction protrudes outward in the width direction from the outer plate portion 476. The outdoor end of the outer plate portion 476 is connected to the middle part of the outdoor plate portion 475 in the width direction. The outer plate portion 476 is connected to the inside in the width direction from the rib 475a in the outdoor plate portion 475. In other words, the outer plate portion 476 is disposed inside in the width direction from the heated foam material 615. The outer plate portion 476 is formed with a shoji assembly hole, a door roller adjustment hole, and an air introduction hole.

[0124] The frame protruding piece 477 protrudes from the outer end of the indoor panel 474 in the width direction to the indoor side. In other words, the frame protruding piece 477 protrudes from the main body 470 that supports the face material 42 to the indoor side. The frame protruding piece 477 has a protruding plate portion 477a and an end plate portion 477b. The protruding plate portion 477a protrudes from the indoor panel 474 to the indoor side. The end plate portion 477b extends from the indoor end of the protruding plate portion 479 to the outside in the width direction. The protruding plate portion 479 faces the outdoor panel portion 475 in the indoor / outdoor direction. When the inner sash 4 is placed in the closed position, the first sight plate portion 294 of the second vertical frame 2d is placed between the protruding plate portion 479 and the outdoor panel portion 475. When the inner screen 4 is placed in the closed position, the indoor surface of the end panel portion 477b comes into contact with a frame airtight material 296 provided on the second vertical frame 2d.

[0125] A rib 477c protruding toward the outdoor side is provided at the middle of the width direction of the end plate portion 477b. The end plate portion 477b is inclined from the rib 477c in the width direction toward the outdoor side toward the outside in the width direction. A heat foaming material 616 is provided on the outdoor side surface of the end plate portion 477b on the outside of the width direction from the rib 477c. The heat foaming material 616 is provided over the entire end plate portion 477b in the up-down direction. The heat foaming material 616 is fixed to the end plate portion 477b by caulking the rib 477c toward the end plate portion 477b. The heat foaming material 616 provided on the end plate portion 477b faces the heat foaming material 615 provided on the outdoor plate portion 475 in the indoor-outdoor direction.

[0126] The metal frame member 47 has a hollow portion 47b surrounded by a groove bottom plate portion 471, an indoor plate portion 474, an outdoor plate portion 475 and an outer plate portion 476.

[0127] The resin frame member 48 has an indoor plate portion 481, an outdoor plate portion 482, a middle sight plate portion 483, an inner plate portion 484, an outer plate portion 485, a middle prospective plate portion 486, and an outer sight plate portion 487. The indoor plate portion 481 is provided on the indoor side of the resin frame member 48. The outdoor plate portion 482 is provided on the outdoor side of the resin frame member 48. The outer plate portion 485 extends from the outer end of the outdoor plate portion 482 in the width direction to the indoor side. The middle prospective plate portion 486 extends from the inner end of the outdoor plate portion 482 in the width direction to the indoor side. The outer sight plate portion 487 extends from the indoor end of the outer plate portion 485 to the inside in the width direction. The indoor end of the outer plate portion 485 is located on the indoor side of the indoor end of the middle sight plate portion 483. The indoor plate portion 481 extends inward in the field direction from the indoor end of the outer plate portion 485.

[0128] The inner plate portion 484 extends from the inside in the width direction of the indoor plate portion 481 to the outdoor side. A protruding piece 484a protruding outward in the width direction is provided at the outdoor end of the inner plate portion 484. At the corner between the indoor plate portion 481 and the inner plate portion 484, a corner plate portion 481a is provided that extends from the indoor plate portion 481 to the outdoor side, bends toward the inside in the width direction, and is connected to the inner plate portion 484.

[0129] The resin frame member 48 has a hollow portion 48a surrounded by an outdoor plate portion 482, a middle visible plate portion 483, an outer plate portion 485, and a middle visible plate portion 486. The resin frame member 48 has a hollow portion 48b surrounded by an indoor plate portion 481, an inner plate portion 484, and an angular plate portion 481a.

[0130] The resin frame member 48 is attached to the metal frame member 47 as follows. The outdoor plate portion 482, the middle visible plate portion 483, the portion of the outer plate portion 485 that is on the outdoor side of the middle visible plate portion 483, the middle visible plate portion 486 and the outer visible plate portion 487 of the resin frame member 48 are arranged at the indoor plate portion 474 of the metal frame member 47 and the indoor side corner of the groove bottom plate portion 471. The indoor plate portion 481 of the resin frame member 48 is arranged at a distance from the indoor side of the indoor groove side plate portion 472 of the metal frame member 47.

[0131] The outdoor end and the protruding piece 484a of the inner plate portion 484 of the resin frame member 48 are arranged on the outdoor side of the indoor gutter side plate portion 472 of the metal frame member 47. The inner end 472a in the width direction of the indoor gutter side plate portion 472 is inserted into the recess 484b surrounded by the inner plate portion 484, the protruding piece 484a and the corner plate portion 481a of the resin frame member 48. The sealant 324 provided on the indoor side of the edge portion on the other side in the width direction of the face material 42 of the inner shoji 4 is in contact with the outdoor surface of the protruding piece 484a of the resin frame member 48, and is not in contact with the indoor gutter side plate portion 472 of the metal frame member 47. The sealant 324 provided on the outdoor side of the edge portion on the other side in the width direction of the face material 42 of the inner shoji 4 is in contact with the outdoor gutter side plate portion 473 of the metal frame member 47. The backup material 323 provided on the indoor side of the face material 42 and the backup material 323 provided on the outdoor side are both in contact with the metal frame member 47.

[0132] Between the metal frame member 47 and the resin frame member 48, hollow portions 47c, 47d, and 47e are formed.

[0133] The outdoor side portion of hollow portion 48a of resin frame member 48 is disposed inside in the width direction of frame protruding piece 477 of metal frame member 47. That is, frame protruding piece 477 and hollow portion 48a of resin frame member 48 are disposed overlapping along the front direction. Frame protruding piece 477 is disposed outside hollow portion 48a of resin frame member 48 in the front direction.

[0134] The frame protruding piece 477 protruding from the main body 470 of the metal frame member 47 to the indoor side comes into contact with the frame airtight material 296 provided on the metal frame member 29 of the second vertical frame 2d. Compared to the case where the main body 470 of the metal frame member 47 comes into direct contact with the frame airtight material 296, the main body 470 of the metal frame member 47 can be disposed on the outdoor side. This allows a large space to be secured for installing the resin frame member 48 on the indoor side of the main body 470 of the metal frame member 47. This allows the hollow portion 48a of the resin frame member 48 to be enlarged. As a result, the thermal insulation performance of the fitting 1 can be improved.

[0135] The frame protruding piece 477 is disposed on the outside of the hollow portion 48a in the facing direction. The outdoor end of the frame protruding piece 477 is connected to the main body portion 470 at a position on the outdoor side of the indoor surface of the panel 42. With this configuration, the hollow portions 34b and 34c can be made larger than the hollow portion 48a of the resin frame member 48.

[0136] As shown in FIG. 15, when a fire occurs, the heated foaming materials 614, 615, and 616 foam due to heat and close the space between the second vertical frame 2d and the door end frame 41c of the inner shoji 4. The heated foaming material 614 is attached to the second vertical frame 2d. The heated foaming materials 615 and 616 are attached to the door end frame 41c. The foamed heated foaming materials 614, 615, and 616 are integrated. The foamed heated foaming material 614 closes the space surrounded by the indoor plate portion 291 of the second vertical frame 2d, the frame airtight material mounting portion 297, the outer plate portion 293, and the frame protruding piece 477 of the door end frame 41c. In the event of a fire, the frame airtight material 296 that was in contact with the end plate portion 477b of the frame protruding piece 477 may melt and disappear. The foamed heated foaming material 614 closes the gap between the frame airtight material mounting portion 297 to which the frame airtight material 296 was attached and the end plate portion 477b of the stile protruding piece 477. This prevents flames from penetrating through the gap between the second vertical frame 2d and the door end frame 41c of the inner door screen 4. The foamed heated foaming materials 615, 616 close the space between the outer plate portion 293 of the second vertical frame 2d and the outer plate portion 476 of the door end frame 41c. The foamed heated foaming materials 615, 616 are provided to close the holes 476a formed in the outer plate portion 476, such as the door screen assembly hole, the door roller adjustment hole, and the air introduction hole.

[0137] As shown in FIG. 17, the joint frame 31d of the outer sash 3 has a metal frame member 39 and a resin frame member 40. The resin frame member 40 is provided on the outdoor side of the metal frame member 39. The metal frame member 39 has a groove bottom plate portion 391, an indoor groove side plate portion 392, an outdoor groove side plate portion 393, an indoor plate portion 394, an outdoor plate portion 395, an outer plate portion 396, a middle visible plate portion 397, a smoke deflector portion 398, and a frame protruding piece 399. The metal frame member 39 has a groove portion 39a into which the side edge portion of the surface material 32 is fitted. The indoor groove side plate portion 392 is provided on the indoor side of the groove portion 39a. The outdoor groove side plate portion 393 is provided on the outdoor side of the groove portion 39a. The groove bottom plate portion 391 is provided at the bottom of the groove portion 39a. The indoor side edge of the groove bottom plate portion 391 is connected to the widthwise outer edge of the indoor groove side plate portion 392. The indoor plate portion 394 extends from the indoor side end of the groove bottom plate portion 391 to the widthwise outer side. The indoor plate portion 394 is provided continuously on the widthwise outer side of the indoor groove side plate portion 392. A rib 394a protruding to the indoor side is formed slightly inside the widthwise outer end of the indoor plate portion 394. The outdoor plate portion 395 extends from the outdoor side end of the groove bottom plate portion 391 to the widthwise outer side. The outdoor plate portion 395 is provided continuously on the widthwise outer side of the outdoor groove side plate portion 393. The outer plate portion 396 is provided at an interval on the widthwise outer side of the groove bottom plate portion 391. The indoor end of the outer plate portion 396 is connected to the outer end of the indoor plate portion 394 in the width direction. The outdoor end of the outer plate portion 396 is connected to the inner end of the outdoor plate portion 395 in the width direction. The intermediate facing plate portion 397 is provided between the indoor plate portion 394 and the outdoor plate portion 395. The inner end of the intermediate facing plate portion 397 in the width direction is connected to the indoor / outdoor direction middle portion of the groove bottom plate portion 391. The outer end of the intermediate facing plate portion 397 in the width direction is connected to the indoor / outdoor direction middle portion of the outer plate portion 396.

[0138] The smoke return section 398 has a projection plate section 398a and a projection plate section 398b. The projection plate section 398a protrudes from the outer end of the width direction of the indoor plate section 394 toward the indoor side. The projection plate section 398b protrudes from the indoor end of the projection plate section 398a toward the inside in the width direction. The projection plate sections 398b face each other at an interval in the indoor-outdoor direction of the indoor plate section 394. A heating foaming material 617 is provided on the inner surface in the width direction of the projection plate section 398a. The heating foaming material 617 is provided over substantially the entirety of the projection plate section 398a in the up-down direction. The outdoor end of the heating foaming material 617 is disposed in the gap between the rib 394a and the projection plate section 398a. The heating foaming material 617 is fixed to the projection plate section 398a by crimping the rib 394a to the projection plate section 398a side.

[0139] The frame protruding piece 399 protrudes indoors from a middle part in the width direction of the indoor gutter side plate part 392. The frame protruding piece 399 has a protruding piece 399a protruding indoors from the indoor gutter side plate part 392, and an end plate part 399b provided at an end part on the indoor side of the protruding piece.

[0140] Metal frame member 39 has a hollow portion 39b surrounded by groove bottom plate portion 391, indoor plate portion 394, outer plate portion 396, and intermediate facing plate portion 397. Metal frame member 39 has a hollow portion 39c surrounded by groove bottom plate portion 391, outdoor plate portion 395, outer plate portion 396, and intermediate facing plate portion 397.

[0141] The resin frame member 40 has an indoor panel portion 401, an outer panel portion 402, and an inner panel portion 403. The indoor panel portion 401 is disposed on the indoor side of the resin frame member 40. The outer panel portion 402 extends from the outer end portion 212c of the indoor panel portion 401 in the width direction to the outdoor side. A metal frame member mounting portion 402a is provided on the outer surface of the outer panel portion 402 in the width direction. The inner panel portion 403 extends from the inner end portion 212c of the indoor panel portion 401 in the width direction to the outdoor side. A protruding piece 403a protruding outward in the width direction is provided on the outdoor end portion of the inner panel portion 403. A rib 403b protruding outward in the width direction is formed on the middle portion of the outer surface of the inner panel portion 403 in the indoor / outdoor direction in the width direction.

[0142] The plastic frame member 40 is attached to the metal frame member 39 as follows. The protruding piece 403a of the inner plate portion 403 of the plastic frame member 40 is attached to the end portion 392a of the indoor groove side plate portion 392 of the metal frame member 39. The inner plate portion 403 of the plastic frame member 40 is disposed on the inside in the width direction of the frame protruding piece 399. The metal frame member mounting portion 402a of the outer plate portion 402 is attached to the end plate portion 399b of the frame protruding piece 399. The indoor plate portion 401 is provided on the inside in the width direction of the end plate portion 399b of the frame protruding piece 399 of the metal frame member 39. The indoor plate portion 401 is disposed at a distance from the indoor side of the indoor groove side plate portion 392 of the metal frame member 39.

[0143] The outdoor end and protruding piece 403a of the inner plate portion 403 of the resin frame member 40 are arranged on the outdoor side of the indoor gutter side plate portion 392 of the metal frame member 39. The inner end 492a in the width direction of the indoor gutter side plate portion 392 is inserted into the recess 403c surrounded by the inner plate portion 403, protruding piece 403a, and rib 403b of the resin frame member 40. The sealant 324 provided on the indoor side of the edge portion on the other side in the width direction of the face material 32 of the outer sash 3 contacts the outdoor surface of the protruding piece 403a of the resin frame member 40 and does not contact the indoor gutter side plate portion 392 of the metal frame member 39. The sealant 324 provided on the outdoor side of the edge portion on the other side in the width direction of the face material 32 of the outer sash 3 contacts the outdoor gutter side plate portion 493 of the metal frame member 39. The backup material 323 provided on the indoor side of the face material 32 and the backup material 323 provided on the outdoor side are both in contact with the metal frame member 39. Between the metal frame member 39 and the resin frame member 40, hollow portions 39d, 39e are formed.

[0144] The joint frame 41d of the inner sash 4 has a metal frame member 49 and a resin frame member 50. The resin frame member 50 is provided on the outdoor side of the metal frame member 49. The metal frame member 49 has a groove bottom plate portion 491, an indoor groove side plate portion 492, an outdoor groove side plate portion 493, an indoor plate portion 494, an outdoor plate portion 495, an outer plate portion 496, an inner plate portion 497, an intermediate facing plate portion 498, and a smoke return portion 499. The metal frame member 49 has a groove portion 49a into which the side edge portion of the facing material 42 is fitted. The indoor groove side plate portion 492 is provided on the indoor side of the groove portion 49a. The outdoor groove side plate portion 493 is provided on the outdoor side of the groove portion 49a. The groove bottom plate portion 491 is provided at the bottom of the groove portion 49a. The indoor edge of the groove bottom plate portion 491 is connected to the widthwise outer edge of the indoor gutter side plate portion 492. The outdoor plate portion 495 extends outward in the width direction from the outdoor end of the gutter bottom plate portion 491. The outdoor plate portion 495 is provided continuously with the widthwise outer side of the outdoor gutter side plate portion 493. A joint frame airtight material 495a is attached to the outdoor surface of the outdoor plate portion 495.

[0145] The outer plate portion 496 is provided on the outer side of the groove bottom plate portion 491 in the width direction with a gap therebetween. The outdoor side end of the outer plate portion 496 is connected to the inner side end of the outdoor plate portion 495 in the width direction. A rib 496a protruding to the outdoor side is provided at the corner portion between the outdoor plate portion 495 and the outer plate portion 496. The indoor side end of the outer plate portion 496 is disposed on the indoor side of the indoor side end of the groove bottom plate portion 491. The inner plate portion 497 extends from the inner side end of the indoor groove side plate portion 492 in the width direction to the indoor side. A rib 497a protruding to the inner side in the width direction is provided at the outdoor side end of the inner plate portion 497. The indoor / outdoor position of the indoor side end of the inner plate portion 497 is the same as the indoor / outdoor position of the indoor side end of the outer plate portion 496. The indoor plate portion 494 is disposed on the indoor side of the indoor groove side plate portion 492. The indoor plate portion 494 is connected to the indoor end of the outer plate portion 496 and the indoor end of the inner plate portion 497. The plate surface of the intermediate facing plate portion 498 is the facing surface. The outer end of the width direction of the intermediate facing plate portion 498 is connected to the middle portion of the outer plate portion 496 in the indoor / outdoor direction. The inner end of the width direction of the intermediate facing plate portion 498 is connected to the middle portion of the groove bottom plate portion 491 in the indoor / outdoor direction.

[0146] The smoke return section 499 has a projection plate section 499a and a sight plate section 499b. The projection plate section 499a protrudes to the outdoor side from the vicinity of the inner end section in the width direction of the outdoor plate section 495. The sight plate section 499b protrudes to the inside in the width direction from the outdoor end section of the projection plate section 499a.

[0147] The metal frame member 49 has a hollow portion 49b surrounded by an indoor groove side plate portion 492, a groove bottom plate portion 491, an intermediate facing plate portion 498, an outer plate portion 496, an indoor plate portion 494, and an inner plate portion 497. The metal frame member 49 has a hollow portion 49c surrounded by the groove bottom plate portion 491, the intermediate facing plate portion 498, the outer plate portion 496, and an outdoor plate portion 495.

[0148] The resin frame member 50 has an indoor panel portion 501, an outer panel portion 502, and an inner panel portion 503. The indoor panel portion 501 is provided on the end surface of the resin frame member 50 on the outdoor side. The outer panel portion 502 extends from the outer end of the indoor panel portion 501 in the width direction to the outdoor side. The outdoor end of the outer panel portion 502 is provided with a metal frame member attachment portion 502a that is attached to the metal frame member 39. The outdoor side and outer end of the metal frame member attachment portion 502a in the width direction is formed with a protruding portion 502b that protrudes to the outdoor side. The inner panel portion 503 extends from the inner end of the indoor panel portion 501 in the width direction to the outdoor side. The outdoor end of the inner panel portion 503 is provided with a protruding piece 503a that protrudes outward in the width direction.

[0149] The resin frame member 50 is attached to the metal frame member 49 as follows. The indoor plate portion 501 of the resin frame member 50 is provided along the indoor surface of the indoor plate portion 494 of the metal frame member 49. The outer plate portion 502 of the resin frame member 50 is arranged along the outer surface in the width direction of the outer plate portion 496 of the metal frame member 49. The inner plate portion 503 is arranged along the inner surface in the width direction of the inner plate portion 497 of the metal frame member 49. The metal frame member attachment portion 502a provided at the outdoor end of the outer plate portion 502 is attached to the rib 496a provided at the outdoor end of the outer plate portion 496 of the metal frame member 49. The protruding piece 503a provided at the outdoor end of the inner plate portion 503 is attached to the rib 497a provided at the outdoor end of the inner plate portion 497 of the metal frame member 49.

[0150] The outdoor end and protruding piece 503a of the inner plate portion 503 of the resin frame member 50 are positioned on the outdoor side of the indoor gutter side plate portion 492 of the metal frame member 49. The sealing material 324 provided on the indoor side of the edge portion on one side in the width direction of the face material 42 of the inner frame member 4 is in contact with the outdoor surface of the protruding piece 503a of the resin frame member 50, and is not in contact with the indoor gutter side plate portion 492 of the metal frame member 49. The sealing material 324 provided on the outdoor side of the edge portion on one side in the width direction of the face material 42 of the inner frame member 4 is in contact with the outdoor gutter side plate portion 493 of the metal frame member 49. The backup material 323 provided on the indoor side of the face material 42 and the backup material 323 provided on the outdoor side are both in contact with the metal frame member 49.

[0151] Two ribs 501a, 501b protruding toward the outdoor side are provided at intervals in the width direction on the outdoor surface of the indoor plate portion 501. The tips of the two ribs 501a, 501b are in contact with the indoor surface of the indoor plate portion 494 of the metal frame member 49. Four ribs 502c, 502d, 502e, 502f protruding inward in the width direction are provided at intervals in the indoor / outdoor direction on the inner surface in the width direction of the outer plate portion 502. The tips of the four ribs 502c, 502d, 502e, 502f are in contact with the outer surface in the width direction of the outer plate portion 496 of the metal frame member 49. One rib 503b protruding outward in the width direction is provided on the outer surface in the width direction of the inner plate portion 503. The tip of the rib 503b is in contact with the inner surface of the inner plate portion 497 of the metal frame member 49 in the width direction.

[0152] Hollow portions 50a, 50b, 50c, 50d, 50e, 50f, 50g, 50h, and 50i are formed between the metal frame member 49 and the resin frame member 50.

[0153] When the outer screen 3 and the inner screen 4 are arranged in the closed position, the sight plate portion 499b of the sash frame 41d of the inner screen 4 is arranged on the outdoor side of the sight plate portion 398b of the smoke deflector portion 398 of the sash frame 31d of the outer screen 3. When the outer screen 3 and the inner screen 4 are arranged in the closed position, the sash frame airtight material 495a of the sash frame 41d of the inner screen 4 comes into contact with the end plate portion 399b of the metal frame member 39 of the sash frame 31d of the outer screen 3. The resin frame member 40 of the joint frame 31d of the outer screen 3 extends in the width direction up to the position of the end plate portion 399b, and when the outer screen 3 and the inner screen 4 are arranged in the closed position, the joint frame airtight material 495a of the joint frame 41d of the inner screen 4 may come into contact with the resin frame member 40 of the joint frame 31d of the outer screen 3. The same applies to the second embodiment described later.

[0154] As shown in FIG. 15, when a fire occurs, the heated foaming material 617 foams due to heat and closes the space between the outer door frame 31d and the inner door frame 41d. In the event of a fire, the airtight material 495a, which was in contact with the end plate portion 399b of the frame protruding piece 399 of the outer door frame 31d, may melt and disappear. The foamed heated foaming material 617 closes the gap between the projection plate portion 499a of the smoke return portion 499 of the inner door frame 41d, which was adjacent to the airtight material 495a, and the end plate portion 399b. This prevents the penetration of flames through the gap between the outer door frame 31d and the inner door frame 41d.

[0155] When the outer screen 3 and the inner screen 4 are arranged in the closed position, the frame airtight material 227 of the lower frame 2a with which the frame protruding piece 338 of the lower frame 31a of the outer screen 3 comes into contact, the frame airtight material 248 of the upper frame 2b with which the frame protruding piece 358 of the upper frame 31b of the outer screen 3 comes into contact, and the frame airtight material 276 of the first vertical frame 2c with which the frame protruding piece 379 of the door end frame 31c of the outer screen 3 comes into contact are provided within the same visible surface. In other words, the position where the lower frame 31a of the outer screen 3 comes into contact with the frame airtight material 227 of the lower frame 2a, the position where the upper frame 31b of the outer screen 3 comes into contact with the frame airtight material 248 of the upper frame 2b, and the position where the door end frame 31c of the outer screen 3 comes into contact with the frame airtight material 276 of the first vertical frame 2c are provided within the same visible surface. This surface is referred to as the surface S1 where the airtight material is installed between the frame and frame. The surface S1 where the airtight material is installed between the frame and frame is shown in Figs. 1 and 2.

[0156] When the outer screen 3 and the inner screen 4 are arranged in the closed position, the face including the position of the airtight material 495a that contacts the resin frame member mounting portion 339 of the outer screen 3 is referred to as the airtight material installation face S2. The airtight material installation face S2 is shown in Figures 1 and 2. The airtight material installation face S2 is located on the indoor side of the frame airtight material installation face S1. Hollow portions 34a, 34b, 34c of the resin frame member 34 of the lower frame 31a of the outer screen 3, hollow portion 36b of the resin frame member 36 of the upper frame 31b, hollow portion 38b of the resin frame member 38 of the door end frame 31c, and hollow portion 37d between the metal frame member 37 of the door end frame 31c and the resin frame member 38 are arranged. By adopting such a configuration, the insulation by the hollow portions can be improved.

[0157] As shown in FIG. 18, a heat foaming material 618 is provided on the indoor side of the upper surface of the groove bottom plate portion 431 of the lower frame 41a of the inner screen 4. The heat foaming material 618 is provided so that when heated, it foams toward the backup material 323 on the indoor side of the face material 42 of the inner screen 4. The sealing material 324 on the indoor side of the face material 42 is bonded to the protruding piece 444a of the upper plate portion 444 of the resin frame member 44 of the lower frame 41a. The sealing material 324 on the indoor side of the face material 42 is not bonded to the metal frame member 43 of the lower frame 41a. For this reason, as shown in FIG. 19, if the resin frame member 44 melts and falls off during a fire, it is considered that the sealing material 324 will also fall off or be damaged. In this state, only the backup material 323 is filled between the face material 42 and the metal frame member 43. This can easily cause a gap between the face material 42 and the metal frame member 43, which can lead to ignition. For this reason, by attaching the heating foaming material 618, which foams toward the backup material 323 in the event of a fire, to the groove, ignition can be prevented.

[0158] As shown in Fig. 20, the inner rail 219 of the lower frame 2a has a drain hole 219a penetrating in the indoor / outdoor direction. The frame protruding piece 221 of the lower frame 2a has a drain hole 221a penetrating in the vertical direction. These drain holes 219a, 221a are provided to discharge wastewater on the indoor side of the inner rail 219 to the outdoor side. Water in the frame protruding piece 221 on the indoor side of the inner rail 219 passes through the drain hole 219a of the inner rail 219, passes through the drain hole 221a of the frame protruding piece 221, flows from the underside of the frame protruding piece 221 over the upper surface of the middle plate portion 212, and is drained to the outdoors.

[0159] A drain hole cover material 52 is provided on the other side of the width direction above the frame protruding piece 221 in the range where the closed inner sash 4 is located. The drain hole cover material 52 prevents water from entering the drain holes 219a, 221a from the outdoor side. The drain hole cover material 52 has a cover part 521 and a fixing part 522. The cover part 521 covers the drain holes 219a, 221a. The fixing part 522 is fixed to the lower frame 2a. The cover part 521 is disposed on the frame protruding piece 221, and the outdoor side part of the cover part 521 is provided along the upper surface of the frame protruding piece 221. The indoor side part of the cover part 521 is provided with an inclined part 521a that gradually inclines upward toward the indoor side. The indoor side end of the cover part 521 is disposed on the drain hole 219a of the inner rail 219. The outdoor end of the cover part 521 is attached to the member mounting part 229. The fixing part 522 extends downward from the indoor end of the cover part 521. The lower end of the fixing part 522 is fixed to a rib 223b provided on the underside of the inner rail 219. The fixing part 522 is covered by the cover part 521 and is not exposed. The fixing part 522 has a notch 522a that penetrates in the indoor / outdoor direction at a position overlapping with the drainage hole 219a of the inner rail 219. A space 52a is formed between the drainage hole cover material 52 and the lower frame 2a.

[0160] To ensure high watertightness, it is important not to let water get inside the inner rail 219 at the bottom of the bottom frame 41a of the inner screen 4, and if water does get in, it is important to drain it quickly. By providing a gap between the bottom frame 41a of the inner screen 4 and the inner rail 219 of the bottom frame 2a, the space below the bottom frame 41a is made to have external pressure, preventing water from entering from outdoors to indoors due to the pressure difference. A drain hole cover material 52 is provided over the entire length range where the inner screen 4 is located in the closed position on the bottom frame 2a, and water can be drained through the space between the drain hole cover material 52 and the bottom frame 2a. The drain hole cover material 52 can prevent water drained from the indoor side to the outdoors from flowing back inside the room.

[0161] Above the inclined portion 521a of the drain hole cover material 52, the rib 435a at the lower end of the outdoor plate portion 435 of the lower frame 41a is arranged at an interval. The inclined portion 521a and the rib 435a narrow the gap between the lower frame 2a and the lower frame 41a compared to when the drain hole cover material 52 and the rib 435a are not provided, so that water that bounces off the upper surface of the drain hole cover material 52 can be prevented from entering the indoor side of the inner rail 219 through the gap between the drain hole cover material 52 and the lower frame 41a. Outside air can be introduced to the indoor side of the inner rail 219 through the gap between the drain hole cover material 52 and the lower frame 41a. In FIG. 20, the flow line of water that bounces back to enter the indoors from the outdoors is indicated by an arrow A1. In FIG. 20, the flow line of outside air that is introduced from the outdoors to the indoors is indicated by an arrow A2.

[0162] In the plan view shown in FIG. 21, a first resin cover material 51 is provided in the area 221b that overlaps with the part on one side of the joint frame 31d of the outer screen 3 in the closed state in the frame protruding piece 221 of the lower frame 2a in the width direction in the indoor / outdoor direction, as shown in FIG. 22. This improves the thermal insulation of the area where the outer screen 3 in the closed state is placed in the frame protruding piece 221 of the lower frame 2a. In the plan view shown in FIG. 21, a drain hole cover material 52 is provided in the area 221c that overlaps with the part on the other side of the joint frame 41d of the inner screen 4 in the closed state in the frame protruding piece 221 in the width direction in the indoor / outdoor direction, as shown in FIG. 23. This improves the watertightness of the area where the inner screen 4 in the closed state is placed in the frame protruding piece 221 of the lower frame 2a. The indoor side member of the lower frame 31a of the outer screen 3 in the closed position in FIG. 21 is the inner screen stopper 201.

[0163] In the plan view shown in FIG. 21, a wind stop plate 53 is provided on one side of the width of the area of ​​the frame protrusion 221 of the lower frame 2a that overlaps with the joint frame 31d of the outer door 3 in the closed state and the joint frame 41d of the inner door 4 in the closed state in the indoor / outdoor direction, i.e., the area 221d on the outer door 3 side, as shown in FIG. 24. The position where the wind stop plate 53 is provided in the plan view is indicated by the symbol 53 in FIG. 21. In the plan view shown in FIG. 21, a water drain hole 54 is provided on the other side of the width of the area of ​​the frame protrusion 221 of the lower frame 2a that overlaps with the joint frame 31d of the outer door 3 in the closed state and the joint frame 41d of the inner door 4 in the closed state in the indoor / outdoor direction, i.e., the area 221e on the inner door 4 side, as shown in FIG. 25. The water drain hole 54 is formed by cutting a part of the frame protrusion 221 from the lower frame 2a. The position where the water drain hole 54 is formed by cutting away the frame protruding piece 221 in a plan view is indicated by the reference symbol 54 in Fig. 21. By preventing the wind stop plate 53 from interfering with the water drain hole 54, water is prevented from adhering to the wind stop plate 53, improving the watertightness of the lower frame 2a.

[0164] 26 to 29 show the joint between the bottom frame 41a and the end frame 41c of the inner sash 4. The inside of the groove 43a into which the edge of the face material 42 of the bottom frame 41a is fitted is continuous with the inside of the groove 47a into which the edge of the face material 42 of the end frame 41c is fitted. The end faces of the metal frame member 43 and the plastic frame member 44 of the bottom frame 41a on the end frame 41c side are in contact with the groove bottom plate 471, which is the bottom of the groove 47a of the end frame 41c. The inner plate 484, the protruding piece 484a, and the corner plate 481a provided on the widthwise inner side of the plastic frame member 48 of the end frame 41c, i.e., on the end on the bottom frame 41a side, are formed with a notch 48c into which the end of the plastic frame member 44 of the frame 41 fits. The resin frame member 44 of the lower frame 41a contacts the resin frame member 48 of the door end frame 41c. The groove bottom plate portion 471, the indoor groove side plate portion 472, and the outdoor groove side plate portion 473 of the metal frame member 47 of the door end frame 41c each have a notch portion 471a, 472e, 473a into which the end of the metal frame member 43 of the lower frame 41a fits. At the joint between the horizontal frame extending laterally in the outer shoji 3 and the inner shoji 4, i.e., the upper frame and the lower frame, and the vertical frame extending vertically, i.e., the door end frame and the joint frame, the resin frame member and the metal frame member of the vertical frame may have a notch portion into which the end of the resin frame member and the metal frame member of the horizontal frame fits, as described above.

[0165] Second embodiment As shown in FIG. 30, the fitting 1B according to the second embodiment has an indoor gutter side panel 432B different from the indoor gutter side panel 432 of the fitting 1 according to the first embodiment. The indoor gutter side panel 432B is provided on the metal frame member 43 of the lower frame 41a of the inner sash 4. A step 432b is provided near the upper end of the indoor gutter side panel 432B. The step inner panel 432c above the step 432b in the indoor gutter side panel 432 is arranged on the indoor side of the step outer panel 432d below the step 432b. The step 432b is arranged at the height of the middle part in the vertical direction of the backup material 323. The protruding piece 444a of the upper panel 444 of the resin frame member 44 is arranged on the outdoor side of the step inner panel 432c of the indoor gutter side panel 432, and is in contact with the sealing material 324 provided on the indoor side of the surface material 42. The lower side of the backup material 323 provided on the indoor side of the face material 42 is in contact with the step outer plate portion 432d. A gap is provided between the upper side of the backup material 323 and the step inner plate portion 432c. Hollow portions 43b, 43d are formed between the metal frame member 43 and the resin frame member 44.

[0166] As shown in FIG. 31, the fitting 1B according to the second embodiment has an indoor gutter side panel 472B different from the indoor gutter side panel 472 of the fitting 1 according to the first embodiment. The indoor gutter side panel 472B is provided on the metal frame member 47 of the door end frame 41c of the inner sash 4. A step 472b may be provided near the inner end of the indoor gutter side panel 472 in the width direction. The step inner panel 472c on the width direction inner side of the step 472b in the indoor gutter side panel 472 is arranged on the indoor side of the step outer panel 472d below the step 472b. The step 472b is arranged on the outdoor side of the inner end of the backup material 323 in the width direction. The protruding piece 484a of the inner plate portion 484 of the resin frame member 48 is disposed on the outdoor side of the stepped inner plate portion 472c of the indoor gutter side plate portion 472, and is in contact with the sealing material 324 provided on the indoor side of the face material 42. The backup material 323 provided on the indoor side of the face material 42 is in contact with the stepped outer plate portion 432d. A hollow portion 47e is formed between the metal frame member 47 and the resin frame member 48. In each frame of the outer screen 3 and the inner screen 4, a step may be provided in the indoor gutter side plate portion as described above.

[0167] 32 to 35 show the joint between the bottom frame 41a and the door end frame 41c of the inner sash 4. A resin caulking sealer 41e is provided between the bottom frame 41a and the door end frame 41c. As shown in Figs. 36 and 37, the caulking sealer 41e is bent. The caulking sealer 41e is attached to the groove bottom plate portion 471 and the indoor groove side plate portion 472 that form the groove portion 47a of the metal frame member 47 of the door end frame 41c. The portion 41f of the caulking sealer 41e that is attached to the groove bottom plate portion 471 is attached to the inner side in the width direction of the groove bottom plate portion 471, that is, the surface facing the end face of the surface material 42. The portion 41g of the caulking sealer 41e that is attached to the indoor groove side plate portion 472 is provided along the upper edge portion of the cutout portion 472e formed in the indoor groove side plate portion 472. As described above, the caulking sealer 41e is provided between the horizontal frames, i.e., the upper and lower frames, that extend horizontally in the outer and inner screens 3 and 4, and the vertical frames, i.e., the door end frame and the door joint frame, that extend vertically. This configuration improves the watertightness and airtightness of the frame 41.

[0168] Third embodiment As shown in Fig. 38 to Fig. 40, the fitting 1C according to the third embodiment is a vertical sliding window. The fitting 1C is an aluminum-resin composite sash. The fitting 1C is a sash for a building. The fitting 1C has a frame 7 and a paper screen 8.

[0169] As shown in Figures 39 and 40, the frame 7 has a lower frame 7a, an upper frame 7b, a first vertical frame 7c, and a second vertical frame 7d. The shoji screen 8 has a frame 81 and a face material 82. The frame 81 has a lower frame 81a, an upper frame 81b, a first vertical frame 81c, and a second vertical frame 81d. The face material 82 is a double-glazed glass. The face material 82 is fitted into a groove provided in the frame 81, and a backup material 823 and a sealing material 824 are provided between the face material 82 and the side of the groove.

[0170] As shown in FIG. 39, the lower frame 7a has a metal frame member 71 and a resin frame member 73. The metal frame member 71 and the resin frame member 73 extend in the width direction. The cross-sectional shapes of the metal frame member 71 and the resin frame member 73 are substantially the same across the entire width direction. The metal frame member 71 has a lower plate portion 711, a middle plate portion 712, an upper plate portion 713, an indoor plate portion 714, a first sight plate portion 715, a connecting plate portion 716, a second sight plate portion 717, an outdoor plate portion 718, a lower protruding piece 719, and a water drain fixing piece 720. The indoor plate portion 714 is provided at the end portion on the indoor side. The upper end portion of the indoor plate portion 714 is provided with a resin frame member mounting portion 714a for mounting the resin frame member 73. The middle plate portion 712 extends from the middle portion of the indoor plate portion 714 in the up-down direction to the outdoor side.

[0171] The first sight plate portion 715 extends upward from the middle portion of the middle plate portion 712 in the indoor / outdoor direction. A frame airtight material mounting portion 722 for mounting a frame airtight material 721 is provided on the outdoor side of the upper end of the first sight plate portion 715. A resin frame member mounting portion 715a for mounting a resin frame member 73 is provided on the indoor side of the upper end of the first sight plate portion 715. The first sight plate portion 715 and the indoor plate portion 714 are arranged at a distance in the indoor / outdoor direction. The upper plate portion 713 is provided between the indoor plate portion 714 and the first sight plate portion 715. The upper plate portion 713 is arranged slightly below the frame airtight material mounting portion 722. A heating foaming material 619 is provided below the frame airtight material mounting portion 722 on the outdoor side surface of the first sight plate portion 715. The heating foaming material 619 is provided over the entire length of the first sight plate portion 715. The heated foaming material 619 is fixed to the first mounting plate portion 715 by a fastener 619a. The fastener is, for example, a screw.

[0172] The connecting plate portion 716 extends downward from the middle portion of the middle plate portion 712 in the indoor / outdoor direction. The connecting plate portion 716 is disposed on the outdoor side of the first sight plate portion 715. The lower plate portion 711 extends from the lower end of the connecting plate portion 716 to the outdoor side. The outdoor plate portion 718 extends downward from the outdoor side end of the lower plate portion 711. The drain fixing piece 720 extends from the lower end of the outdoor plate portion 718 to the indoor side, and then bends and extends downward. The second sight plate portion 717 extends upward from the middle portion of the lower plate portion 711 in the indoor / outdoor direction. The upper end of the second sight plate portion 717 is provided with a protruding plate portion 723 that protrudes to the indoor side. The protruding plate portion 723 and the middle plate portion 712 are disposed at the same height. The protruding plate portion 723 is disposed on the outdoor side of the middle plate portion 712. The outdoor end of the middle plate portion 712 and the indoor end of the protruding plate portion 723 are disposed with a gap therebetween.

[0173] The resin frame member 73 has a hollow portion 73b surrounded by a middle plate portion 712, an upper plate portion 713, an indoor plate portion 714 and a first observation plate portion 715.

[0174] The resin frame member 73 is provided on the indoor side of the metal frame member 71. The resin frame member 73 has an upper plate portion 731 and a lower protruding plate portion 732. The upper plate portion 731 is attached to the resin frame member mounting portion 715a of the first observation plate portion 715 and the resin frame member mounting portion 714a of the indoor plate portion 714. The upper plate portion 731 is fixed to the window frame 16. See FIG. 38 for the window frame 16. A protruding portion 733 that protrudes further outdoors than the upper plate portion 731 is provided at the outdoor end of the upper plate portion 731. The protruding portion 733 is molded from a resin that is softer than the upper plate portion 731. The lower protruding plate portion 732 extends downward from the middle portion of the upper plate portion 731 in the indoor / outdoor direction, and bends to the outdoor side to contact the indoor plate portion 714. The resin frame member 73 is in contact with the heat insulating material 17 provided in the building. For the insulation material 17, see FIG.

[0175] The lower frame 81a has a metal frame member 83 and a resin frame member 84. The metal frame member 83 and the resin frame member 84 extend in the width direction. The cross-sectional shapes of the metal frame member 83 and the resin frame member 84 are substantially the same throughout the width direction. The metal frame member 83 has a groove portion 83a into which the lower edge portion of the face material 82 is fitted. The metal frame member 83 has a groove bottom plate portion 831, an indoor groove side plate portion 332, an outdoor groove side plate portion 833, an indoor plate portion 834, an outdoor plate portion 335, a lower plate portion 836, a frame protruding piece 837, a first resin frame member mounting portion 838, and a second resin frame member mounting portion 839. The groove bottom plate portion 831, the indoor groove side plate portion 332, the outdoor groove side plate portion 833, the indoor plate portion 834, the outdoor plate portion 335, the lower plate portion 836, the first resin frame member mounting portion 838 and the second resin frame member mounting portion 839 form the main body portion 830 that supports the surface material 82.

[0176] The groove bottom plate portion 831 is provided at the bottom of the groove portion 83a. The indoor groove side plate portion 832 is provided on the indoor side of the groove portion 83a. The indoor groove side plate portion 832 extends upward from the indoor side end of the groove bottom plate portion 831. A first resin frame member mounting portion 838 is attached to the indoor side surface of the indoor groove side plate portion 832. The outdoor groove side plate portion 833 is provided on the outdoor side of the groove portion 83a. The outdoor groove side plate portion 833 extends upward from the outdoor side end of the groove bottom plate portion 831. The groove bottom plate portion 831, the indoor groove side plate portion 832 and the outdoor groove side plate portion 833 form the groove portion 83a. The surface material 82 is disposed approximately in the center of the groove portion 83a in the indoor / outdoor direction.

[0177] The indoor plate portion 834 extends downward from the middle portion of the groove bottom plate portion 831 in the indoor / outdoor direction. A first resin frame member attachment portion 838 for attaching the resin frame member 84 is provided on the outdoor side of the vertical middle portion of the indoor plate portion 834. The outdoor plate portion 835 extends downward from the outdoor end portion of the groove bottom plate portion 831. The outdoor plate portion 835 is provided continuously on the lower side of the outdoor groove side plate portion 833. The lower plate portion 836 is provided between the indoor plate portion 834 and the outdoor plate portion 835. The indoor end portion of the lower plate portion 836 is connected to the lower end portion of the indoor plate portion 834. The outdoor end portion of the lower plate portion 836 is connected to the vertical middle portion of the outdoor plate portion 335.

[0178] The frame protruding piece 837 protrudes from the lower end of the indoor panel 834 to the indoor side. That is, the frame protruding piece 837 protrudes from the main body 830 that supports the surface material 82 to the indoor side. The frame protruding piece 338 is disposed at approximately the same height as the lower panel 836. The frame protruding piece 837 has a protruding panel 837a and an end panel 837b. The protruding panel 837a protrudes from the lower end of the indoor panel 834 to the indoor side. The protruding panel 837a is formed with a rib 837c that protrudes downward from the middle part in the indoor / outdoor direction. The lower end of the rib 837c is bent to the indoor side. The end panel 837b is flat. The end panel 837b protrudes downward from the indoor end of the protruding panel 837a with the panel surface facing the interior. The indoor surface of the end plate portion 837b is in contact with the frame airtight material 721 of the lower frame 7a. The outdoor surface of the end plate portion 837b is provided with a rib 837d that protrudes to the outdoor side. The rib 837d is disposed at the same height as the lower end of the rib 837c of the protruding plate portion 837a. A gap is formed between the rib 837d and the protruding plate portion 837a. A second resin frame member mounting portion 839 is attached near the indoor end of the protruding plate portion 837a.

[0179] The heat foaming material 620 is provided between the rib 837c and the end plate 837b on the lower surface of the protruding plate 837a. The heat foaming material 620 is provided over the entire length of the end plate 837b. The indoor end of the heat foaming material 620 is disposed between the rib 837d of the end plate 837b and the protruding plate 837a. The outdoor end of the heat foaming material 620 is disposed between the protruding plate 837a and the lower end of the rib 837c. The heat foaming material 620 is fixed to the protruding plate 837a by crimping the rib 837c to the protruding plate 837a.

[0180] The metal frame member 83 has a hollow portion 83b surrounded by a groove bottom plate portion 831, an indoor plate portion 834, an outdoor plate portion 835 and a lower plate portion 836.

[0181] The resin frame member 84 is provided on the indoor side of the metal frame member 83. The resin frame member 84 has an indoor plate portion 841, an outdoor plate portion 842, an upper plate portion 843, a lower plate portion 844, a middle plate portion 845, a lower protruding piece 847, a first metal frame member mounting portion 848, and a second metal frame member mounting portion 849. The indoor plate portion 841 is disposed on the indoor side. The outdoor plate portion 842 is disposed on the outdoor side of the indoor plate portion 841 with a gap therebetween. The upper plate portion 843 extends from the upper end portion of the indoor plate portion 841 to the outdoor side. The outdoor end portion of the upper plate portion 843 is provided on the outdoor side of the outdoor plate portion 842. The upper end portion of the outdoor plate portion 842 is connected to the middle portion of the upper plate portion 843 in the indoor / outdoor direction. The upper plate portion 843 has a protruding piece 843a protruding downward at its outdoor end. The lower plate portion 844 is provided between the lower end of the indoor plate portion 841 and the lower end of the outdoor plate portion 842. The middle plate portion 845 is provided between the vertical middle portion of the indoor plate portion 841 and the vertical middle portion of the outdoor plate portion 842. The lower protruding piece 847 protrudes downward from the outdoor end of the lower plate portion 844. The first metal frame member attachment portion 848 is provided at the vertical middle portion of the outdoor surface of the outdoor plate portion 842. The second metal frame member attachment portion 849 is provided under the corner between the lower plate portion 844 and the indoor plate portion 841.

[0182] Resin frame member 84 has a hollow portion 84a surrounded by indoor plate portion 841, outdoor plate portion 842, upper plate portion 843, and middle plate portion 845. Resin frame member 84 has a hollow portion 84b surrounded by indoor plate portion 841, outdoor plate portion 842, lower plate portion 844, and middle plate portion 845.

[0183] The resin frame member 84 is attached to the metal frame member 83 as follows. The resin frame member 84 is disposed at the corner formed by the indoor groove side panel portion 832 and the indoor panel portion 834 of the metal frame member 83 and the frame protruding piece 837. The outdoor panel portion 842 of the resin frame member 84 faces the indoor groove side panel portion 832 and the indoor panel portion 834. The lower panel portion 844 of the resin frame member 84 faces the frame protruding piece 837. The first metal frame member mounting portion 848 is attached to the first resin frame member mounting portion 838 of the metal frame member 83. The second metal frame member mounting portion 849 is attached to the second resin frame member mounting portion 839. The lower end portion of the lower protruding piece 847 contacts the protruding panel portion 837a. The protruding piece 843a of the upper plate portion 843 is disposed on the outdoor side of the upper end portion of the indoor gutter side plate portion 832. The sealing material 824 on the indoor side of the face material 82 does not contact the indoor gutter side plate portion 832 of the metal frame member 83, but contacts the protruding piece 843a.

[0184] Between the metal frame member 83 and the resin frame member 84, hollow portions 83c, 83d, and 83e are formed.

[0185] When a fire occurs and the heating foaming material 619, 620 is heated, as shown in FIG. 43, the foamed heating foaming material 619, 620 closes the space surrounded by the middle plate portion 712 of the lower frame 7a, the first facing plate portion 715, and the frame protruding piece 837 of the lower frame 81a. Normally, the frame protruding piece 837 is in contact with the frame airtight material 721 provided on the middle plate portion 712 of the lower frame 7a. In the event of a fire, the frame airtight material 721 may melt and disappear. The foamed heating foaming material 619, 620 closes the gap between the frame airtight material mounting portion 748 to which the frame airtight material 721 was attached and the end plate portion 837b of the frame protruding piece 837. This prevents the flame from penetrating through the gap between the lower frame 7a and the lower frame 81a.

[0186] The hollow portions 84b, 84c of the resin frame member 84 are disposed vertically above the frame protruding piece 837 of the metal frame member 83. That is, the frame protruding piece 837 and the hollow portions 84b, 84c of the resin frame member 84 are disposed overlapping each other along the front direction. The frame protruding piece 837 is disposed outside the hollow portions 84b, 84c of the resin frame member 84 in the front direction.

[0187] The frame protruding piece 837 protruding from the main body 830 of the metal frame member 83 to the indoor side comes into contact with the frame airtight material 721 provided on the metal frame member 71 of the lower frame 7a. Compared to the case where the main body 830 of the metal frame member 83 comes into direct contact with the frame airtight material 227, the main body 830 of the metal frame member 83 can be positioned on the outdoor side. This makes it possible to secure a large space for installing the resin frame member 34 on the indoor side of the main body 830 of the metal frame member 83. This allows the hollow portions 84a, 84b of the resin frame member 84 to be enlarged. As a result, the thermal insulation performance of the fitting 1 can be improved.

[0188] The frame protruding piece 837 is disposed on the outside of the hollow portions 84a, 84b in the view direction. The outdoor end of the frame protruding piece 837 is connected to the main body portion 830 at a position on the outdoor side of the indoor surface of the face material 32. With this configuration, the hollow portions 84a, 84b of the resin frame member 84 can be made larger.

[0189] The upper frame 7b has a metal frame member 74 and a resin frame member 75. The metal frame member 74 and the resin frame member 75 extend in the width direction. The cross-sectional shapes of the metal frame member 74 and the resin frame member 75 are substantially the same across the entire width direction. The metal frame member 74 has a lower plate portion 741, an indoor plate portion 742, an outdoor plate portion 743, a facing plate portion 744, and an upper plate portion 745. The upper plate portion 745 is provided on the upper side. The outdoor plate portion 743 extends downward from the outdoor side end of the upper plate portion 745. The lower plate portion 741 extends from the lower end of the outdoor plate portion 743 to the indoor side. The indoor plate portion 742 extends upward from the indoor side end of the lower plate portion 741. The facing plate portion 744 extends downward from the middle portion of the lower plate portion 741 in the indoor / outdoor direction. The portion of the lower plate portion 741 that is on the indoor side of the sight plate portion 744 gradually slopes upward in an oblique direction toward the indoor side. A first resin frame member mounting portion 746 for mounting the resin frame member 75 is provided below the corner formed by the lower plate portion 741 and the outdoor plate portion 743. A frame airtight material mounting portion 748 for mounting a frame airtight material 747 is provided at the lower end of the sight plate portion 744. A second resin frame member mounting portion 749 for mounting the resin frame member 75 on the outdoor side of the frame airtight material mounting portion 748 is provided at the lower end of the sight plate portion 744.

[0190] A rib 741a that protrudes downward and further toward the outdoor side is provided on the outdoor side of the facing plate portion 744 of the lower plate portion 741. A rib 744a that protrudes toward the outdoor side is provided slightly below the connection portion of the facing plate portion 744 with the lower plate portion 741. A heat-foaming material 621 is provided on the outdoor side of the facing plate portion 744 on the underside of the lower plate portion 741. The heat-foaming material 621 is provided over the entire length of the lower plate portion 741.

[0191] The resin frame member 75 is provided on the indoor side of the metal frame member 74. The resin frame member 75 has a main body 751, a first metal frame member mounting portion 752, a second metal frame member mounting portion 753, an outdoor protruding portion 754, and an indoor protruding piece 755. The resin frame member 75 is provided at a corner formed by the facing plate portion 744 of the metal frame member 74 and a portion of the lower plate portion 741 that is indoors relative to the facing plate portion 744. The first metal frame member mounting portion 752 is attached to the first resin frame member mounting portion 746. The second metal frame member mounting portion 753 is attached to the second resin frame member mounting portion 749. The outdoor protruding portion 754 protrudes from the outdoor side and lower end of the main body 751 to the outdoor side. The outdoor protruding portion 754 is formed of a resin that is softer than other portions of the resin frame member 75. The outdoor protrusion 754 comes into contact with the resin frame member 86 of the upper frame 81b of the shoji screen 8 in the closed state.

[0192] The indoor side protruding piece 755 protrudes from the main body 751 to the indoor side. is fixed to a window frame 16. See FIG. 38 for the window frame 16. The resin frame member 75 is in contact with a heat insulating material 17 provided in the building. See FIG. 38 for the heat insulating material 17. The resin frame member 75 has hollow portions 75a, 75b, and 75c formed therein.

[0193] The resin frame member 75 is attached to the metal frame member 74 as follows. A first metal frame member mounting portion 752 of the resin frame member 75 is attached to a first resin frame member mounting portion 746 of the metal frame member 74. A second metal frame member mounting portion 753 of the resin frame member 75 is attached to a second resin frame member mounting portion 749 of the metal frame member 74. Hollow portions 75d, 75e are formed between the resin frame member 75 and the metal frame member 74.

[0194] The upper frame 81b has a metal frame member 85 and a resin frame member 86. The metal frame member 85 and the resin frame member 86 extend in the width direction. The cross-sectional shapes of the metal frame member 85 and the resin frame member 86 are substantially the same throughout the width direction. The metal frame member 85 has a groove portion 85a into which the upper edge portion of the face material 82 is fitted. The metal frame member 85 has a groove bottom plate portion 851, an indoor groove side plate portion 852, an outdoor groove side plate portion 853, an indoor plate portion 854, an outdoor plate portion 855, an upper plate portion 856, and a frame protruding piece 857. The gutter bottom plate portion 851 , the indoor gutter side plate portion 852 , the outdoor gutter side plate portion 853 , the indoor plate portion 854 , the outdoor plate portion 855 and the upper plate portion 856 constitute the main body portion 850 that supports the panel 82 .

[0195] The groove bottom plate portion 851 is provided at the bottom of the groove portion 85a. The indoor groove side plate portion 852 is provided on the indoor side of the groove portion 85a. The indoor groove side plate portion 852 is a separate member from other parts of the metal frame member 85. The indoor groove side plate portion 852 is attached to the indoor end of the groove bottom plate portion 851 and extends downward from the groove bottom plate portion 851. The outdoor groove side plate portion 853 is provided on the outdoor side of the groove portion 85a. The outdoor groove side plate portion 853 extends upward from the outdoor end of the groove bottom plate portion 831. The groove bottom plate portion 831, the indoor groove side plate portion 832, and the outdoor groove side plate portion 833 form the groove portion 85a. The surface material 82 is disposed approximately in the center of the groove portion 85a in the indoor / outdoor direction. The indoor plate portion 854 extends upward from the indoor end of the groove bottom plate portion 851. The outdoor plate portion 855 extends upward from the outdoor end of the groove bottom plate portion 851. The upper end of the outdoor plate portion 855 is disposed higher than the upper end of the indoor plate portion 854. A fin portion 855a is provided at the upper end of the outdoor plate portion 855. When the shoji screen 8 is disposed in the closed position, the fin portion 855a comes into contact with the lower plate portion 741 of the metal frame member 71 of the upper frame 7b. The upper plate portion 856 extends from the upper end of the indoor plate portion 854 to the outdoor side.

[0196] The frame protruding piece 857 extends from the upper end of the indoor board 854 to the indoor side. That is, the frame protruding piece 857 protrudes from the main body 850 that supports the surface material 82 to the indoor side. The frame protruding piece 857 has a protruding plate portion 857a and an end plate portion 857b. The protruding plate portion 857a extends from the upper end of the indoor board portion 854 to the indoor side. The end plate portion 857b extends upward from the indoor end of the protruding plate portion 857a. When the shoji screen 8 is placed in the closed position, the protruding plate portion 857a comes into contact with the frame airtight material 747 provided on the upper frame 7b. The metal frame member 85 has a hollow portion 85b surrounded by the groove bottom plate portion 851, the indoor board portion 854, the outdoor board portion 855, and the upper plate portion 856.

[0197] The resin frame member 86 has a first member 861 and a second member 862. The first member 861 is attached to the indoor side of the indoor groove side panel portion 852 of the metal frame member 85. The second member 862 is attached to the corner portion formed by the indoor panel portion 854 of the metal frame member 85 and the frame protruding piece 857. The second member 862 is provided on the first member 861. The outdoor surface 62a of the second member 862 comes into contact with the outdoor protruding portion 754 of the resin frame member 75 of the upper frame 7b when the shoji screen 8 is placed in the closed position.

[0198] The first member 861 has a lower plate portion 861a. The lower plate portion 861a is provided at the lower end of the first member 861. A protruding piece 861b protruding upward is provided at the outdoor end of the lower plate portion 861a. The protruding piece 861b of the lower plate portion 861a is disposed on the outdoor side of the lower end portion of the indoor gutter side plate portion 852. The sealing material 824 on the indoor side of the face material 82 is in contact with the protruding piece 861b without contacting the indoor gutter side plate portion 852 of the metal frame member 85. A hollow portion 86a is formed in the first member 861. Hollow portions 85c and 85d are formed between the metal frame member 85 and the resin frame member 86.

[0199] The hollow portion 86a of the resin frame member 86 is disposed vertically below the frame protruding piece 857 of the metal frame member 85. That is, the frame protruding piece 857 and the hollow portion 86a of the resin frame member 86 are disposed overlapping along the front direction. The frame protruding piece 857 is disposed outside the hollow portion 86a of the resin frame member 86 in the front direction.

[0200] The frame protruding piece 857 protruding from the main body 850 of the metal frame member 85 to the indoor side comes into contact with the frame airtight material 747 provided on the metal frame member 74 of the upper frame 7b. Compared to the case where the main body 850 of the metal frame member 85 comes into direct contact with the frame airtight material 227, the main body 850 of the metal frame member 85 can be positioned on the outdoor side. This makes it possible to secure a large space for installing the resin frame member 34 on the indoor side of the main body 850 of the metal frame member 85. This makes it possible to enlarge the hollow portion 86a of the resin frame member 86. As a result, the thermal insulation performance of the fitting 1 can be improved.

[0201] The frame protruding piece 857 is disposed on the outer side in the front direction of the hollow portion 86a. With this configuration, the hollow portions 84a and 84b of the resin frame member 84 can be made large.

[0202] When a fire occurs and the heating foaming material 621 is heated, as shown in FIG. 43, the foamed heating foaming material 621 blocks the space surrounded by the lower plate portion 741 of the upper frame 7b, the facing plate portion 744, and the frame protruding piece 857 of the upper frame 81b. Normally, the frame protruding piece 857 is in contact with the frame airtight material 747 provided on the facing plate portion 744 of the upper frame 7b. In the event of a fire, the frame airtight material 747 may melt and disappear. The foamed heating foaming material 621 blocks the gap between the frame airtight material mounting portion 748 to which the frame airtight material 747 was attached and the end plate portion 857b of the frame protruding piece 857. This prevents the flame from penetrating through the gap between the upper frame 7b and the upper frame 81b.

[0203] As shown in FIG. 42, the first vertical frame 7c has a metal frame member 76 and a resin frame member 77. The metal frame member 76 has a first member and a second member. The first member 761 has an outer plate portion 763, an indoor plate portion 764, an outdoor plate portion 765, and a sight plate portion 766. The indoor plate portion 764 is provided at the indoor end of the first member 761. The outdoor plate portion 765 is provided at the outdoor end of the first member 761. The outer plate portion 763 is provided between the indoor plate portion 764 and the outdoor plate portion 765. The sight plate portion 766 extends from the middle portion of the outdoor plate portion 765 in the indoor / outdoor direction to the inside in the width direction. A frame airtight material attachment portion 768 to which a frame airtight material 767 is attached is provided at the tip of the sight plate portion 766. The outdoor side of the sight plate portion 766 is provided with a first resin frame member mounting portion 766a and a second resin frame member mounting portion 766b.

[0204] The second member 762 is disposed on the inside in the width direction of the first member 761. The second member 762 is attached to an outer plate portion 763 and a facing plate portion 766 of the first member 761. The second member 762 has an inner plate portion 769 provided on the inside in the width direction of the outer plate portion 763 with a gap therebetween. The heat-foaming material 622 is attached to the inner surface of the inner plate portion 769. The heat-foaming material 622 is fixed to the inner plate portion 769 by crimping a rib 769a provided on the inner plate portion 769 to the inner plate portion 769 side.

[0205] The resin frame member 77 is provided on the indoor side of the metal frame member 76. The resin frame member 77 has a main body 771, a first metal frame member mounting portion 772, a second metal frame member mounting portion 773, a third metal frame member mounting portion 774, an outdoor side protrusion portion 775, and an indoor side protrusion piece 776. The resin frame member 77 is provided at a corner formed by an indoor plate portion 764 of the metal frame member 76 and a portion of the outdoor plate portion 765 that is indoor side of the indoor plate portion 764. The first metal frame member mounting portion 772 is attached to the first resin frame member mounting portion 766a. The second metal frame member mounting portion 773 is attached to the second resin frame member mounting portion 766b. The third metal frame member mounting portion 774 is attached to the outer plate portion 763. The outdoor side protrusion portion 775 protrudes to the outdoor side from an end portion on the outdoor side and on the inner side in the width direction of the main body portion 771. The outdoor protrusion 775 is formed of a softer resin than the other portions of the resin frame member 77. The outdoor protrusion 775 comes into contact with the resin frame member 88 of the first vertical frame 81c of the shoji screen 8 in the closed state.

[0206] The indoor side protruding piece 776 protrudes from the main body portion 771 towards the indoor side. The indoor side protruding piece 776 is fixed to the window frame 16. See FIG. 39 for the window frame 16. The resin frame member 77 is in contact with the insulation material 17 provided in the building. See FIG. 38 for the insulation material 17. The resin frame member 77 has hollow portions 77a, 77b, 77c, and 77d formed therein. Hollow portions 76a, 76b, and 76c are formed between the metal frame member 76 and the resin frame member 77.

[0207] The first vertical frame 81c has a metal frame member 87 and a resin frame member 88. The metal frame member 87 and the resin frame member 88 extend in the vertical direction. The cross-sectional shapes of the metal frame member 87 and the resin frame member 88 are substantially the same throughout the vertical direction. The resin frame member 88 is provided on the indoor side of the metal frame member 87. The metal frame member 87 has a groove portion 87a into which the side edge portion of the face material 82 is fitted. The metal frame member 87 has a groove bottom plate portion 871, an indoor groove side plate portion 872, an outdoor groove side plate portion 873, an indoor plate portion 874, an outdoor plate portion 875, a middle plate portion 876, a visible plate portion 877, and a frame protruding piece 878. The groove bottom plate portion 871, the indoor groove side plate portion 872, the outdoor groove side plate portion 873, the indoor plate portion 874, the outdoor plate portion 875, the middle plate portion 876 and the facing plate portion 877 constitute the main body portion 870 which supports the surface material 82.

[0208] The indoor gutter side plate portion 872 is provided on the indoor side of the gutter portion 87a. The indoor gutter side plate portion 872 is attached to the gutter bottom plate portion 871 by a member separate from the other portions of the metal frame member 87. The outdoor gutter side plate portion 873 is provided on the outdoor side of the gutter portion 87a. The gutter bottom plate portion 871 is provided at the bottom of the gutter portion 87a. The indoor side edge portion of the gutter bottom plate portion 871 is connected to the outer edge portion in the width direction of the indoor gutter side plate portion 872. The gutter bottom plate portion 871, the indoor gutter side plate portion 872, and the outdoor gutter side plate portion 873 form the gutter portion 87a. The surface material 82 is disposed approximately in the center of the gutter portion 87a in the indoor / outdoor direction.

[0209] The indoor plate portion 874 extends outward in the width direction from the middle portion of the groove bottom plate portion 871 in the indoor / outdoor direction. The indoor plate portion 874 is disposed on the outdoor side of the indoor groove side plate portion 872. The indoor plate portion 874 is disposed on the indoor side of the indoor surface of the facing material 82. The outdoor plate portion 875 extends outward in the width direction from the outdoor end portion of the groove bottom plate portion 871. A fin portion 875a is provided at the tip portion of the outdoor plate portion 875. When the shoji screen 8 is disposed in the closed position, the fin portion 875a comes into contact with the outdoor plate portion 765 of the first vertical frame 7c. The middle plate portion 876 extends indoors from the middle portion of the outdoor plate portion 875 in the width direction. The indoor end portion of the outdoor plate portion 875 is connected to the outer end portion of the indoor plate portion 874 in the width direction.

[0210] The frame protruding piece 878 protrudes indoors from the outer end of the width direction of the indoor panel 874. That is, the frame protruding piece 878 protrudes indoors from the main body 870 that supports the face material 82. The indoor panel 874 has a protruding panel 874a and an end panel 874b. The protruding panel 874a protrudes indoors from the outer end of the width direction of the indoor panel 874 of the indoor panel 834. The end panel 874b protrudes outward in the width direction from the indoor end of the protruding panel 878a. The frame airtight material 767 of the first vertical frame 7c contacts the indoor surface of the end panel 874b. The facing panel 877 protrudes outward in the field direction from the vicinity of the outdoor end of the protruding panel 878a. A metal core member 879 is provided in the space between the front plate portion 877 and the middle plate portion 876 on the outer side in the width direction of the protruding plate portion 878a.

[0211] The metal frame member 87 has a hollow portion 87 b surrounded by a groove bottom plate portion 871 , an indoor plate portion 874 , an outdoor plate portion 875 and a middle plate portion 876 .

[0212] The resin frame member 88 has a first member 881 and a second member 882. The first member 881 is attached to the indoor side of the indoor groove side panel portion 872 of the metal frame member 87. The second member 882 is attached to the corner formed by the indoor panel portion 874 of the metal frame member 87 and the frame protruding piece 878. The second member 882 is provided on the inside in the width direction of the first member 881. The outdoor side surface of the second member 882 comes into contact with the outdoor protruding portion 775 of the resin frame member 77 of the first vertical frame 7c when the shoji screen 8 is placed in the closed position.

[0213] The first member 881 has an inner plate portion 881a. The inner plate portion 881a is provided at the inner end portion of the first member 881 in the width direction. A protruding piece 881b that protrudes outward in the width direction is provided at the outdoor end portion of the inner plate portion 881a. The protruding piece 881b is disposed on the outdoor side of the inner portion in the width direction of the indoor groove side plate portion 872. The sealing material 824 on the indoor side of the face material 82 is in contact with the protruding piece 881b without contacting the indoor groove side plate portion 872 of the metal frame member 87. A hollow portion 88a is formed in the first member 881. A hollow portion 88b is formed in the second member 882. Hollow portions 85c and 85d are formed between the metal frame member 87 and the resin frame member 88.

[0214] The hollow portions 88a, 88b of the resin frame member 88 are arranged to overlap with the frame protruding piece 878 of the metal frame member 87 along the front direction. The frame protruding piece 878 is arranged outside the hollow portions 88a, 88b of the resin frame member 88 in the front direction.

[0215] The frame protruding piece 878 protruding from the main body 870 of the metal frame member 87 to the indoor side comes into contact with the frame airtight material 767 provided on the metal frame member 76 of the first vertical frame 7c. Compared to the case where the main body 870 of the metal frame member 87 comes into direct contact with the frame airtight material 767, the main body 870 of the metal frame member 87 can be disposed on the outdoor side. This allows a large space to be secured for installing the resin frame member 88 on the indoor side of the main body 870 of the metal frame member 87. This allows the hollow portions 88a, 88b of the resin frame member 88 to be enlarged. As a result, the heat insulating performance of the fitting 1C can be improved.

[0216] The frame protruding pieces 878 are disposed on the outer sides of the hollow portions 84a, 84b in the front direction. With this configuration, the hollow portions 84a, 84b of the resin frame member 84 can be made large.

[0217] When a fire occurs and the heating foaming material 622 is heated, as shown in FIG. 44, the foamed heating foaming material 622 blocks the space surrounded by the inner plate portion 769 of the first vertical frame 7c, the facing plate portion 766, and the core material 879 provided on the outer side of the frame protruding piece 878 of the metal frame member 87 of the first vertical frame 81c in the width direction. Normally, the frame protruding piece 878 is in contact with the frame airtight material 767 provided on the facing plate portion 766 of the first vertical frame 7c. In the event of a fire, the frame airtight material 767 may melt and disappear. The foamed heating foaming material 622 blocks the gap between the facing plate portion 766 to which the frame airtight material 767 was attached and the end plate portion 878b of the frame protruding piece 878. This prevents the flame from penetrating through the gap between the first vertical frame 7c and the first vertical frame 81c.

[0218] As shown in FIG. 44, the second vertical frame 7d has a shape that is generally symmetrical to the first vertical frame 7c in the width direction. The members and parts of the second vertical frame 7d that correspond to the first vertical frame 7c are designated by the same names and symbols as the first vertical frame 7c. The second vertical frame 7d differs from the first vertical frame 7c in the following ways. The second member 762 of the metal frame member 76 is provided with a protruding piece 769b that protrudes inward in the width direction from the inner plate portion 769. The protruding piece 769b protrudes from the middle part of the inner plate portion 769 in the indoor / outdoor direction. The heated foaming material 622 is provided on the indoor side of the protruding piece 769b.

[0219] The second vertical frame 81d has a shape that is generally symmetrical to the first vertical frame 81c in the width direction. The members and parts of the second vertical frame 81d that correspond to the first vertical frame 81c are indicated by the same names and symbols as those of the first vertical frame 81c. The second vertical frame 81d differs from the first vertical frame 81c in the following ways. A protruding piece 878c is provided at the tip of the end plate portion 878b of the frame protruding piece 878 of the metal frame member 87, protruding in an oblique direction gradually toward the outside toward the outside in the width direction. When the shoji screen 8 is placed in the closed position, the protruding piece 878c is placed between the protruding piece 769b of the metal frame member 76 of the second vertical frame 7d and the sight plate portion 766. The metal frame member 87 of the second vertical frame 81d does not have the facing plate portion 877 and the core material 879 that are provided on the metal frame member 87 of the first vertical frame 81c.

[0220] When a fire occurs and the heating foaming material 622 provided on the second vertical frame 7d is heated, the foamed heating foaming material 622 fills the space surrounded by the inner plate portion 769 of the second vertical frame 7d, the facing plate portion 766, and the frame protruding piece 878 of the metal frame member 87 of the first vertical frame 81c, as shown in Figure 44. The end plate portion 878b and the protruding piece 878c are embedded in the heating foaming material 622.

[0221] (Fourth embodiment) As shown in Fig. 45 and Fig. 46, the fitting 1D according to the fourth embodiment is a vertical sliding window. The fitting 1D is an aluminum-resin composite sash. The fitting 1D is a sash for a building. The fitting 1D has a frame 7D and a shoji screen 8D. The fitting 1D is different from the fitting 1C of the third embodiment in the shapes of the frame 7D and the shoji screen 8D.

[0222] The frame body 7D has a lower frame 17a, an upper frame 17b, a first vertical frame 17c, and a second vertical frame 17d. The shoji screen 8D has a frame 181 and a surface material 182. The frame 181 has a lower frame 181a, an upper frame 181b, a first vertical frame 181c, and a second vertical frame 181d. The surface material 182 is a double-glazed glass. The surface material 182 is fitted into grooves 183a, 185a, 187a, and 187a provided in the frame 181.

[0223] As shown in FIG. 45, the lower frame 17a has a metal frame member 171 and a resin frame member 173. The resin frame member 173 is disposed on the indoor side of the metal frame member 171. The metal frame member 171 has a frame airtight material 1712 disposed on the indoor board portion 1711 disposed on the indoor side. The frame airtight material 1712 is disposed on the outdoor side of the indoor board portion 1711. The heated foaming material 623 is disposed on the outdoor surface of the indoor board portion 1711. The heated foaming material 623 is disposed over the entire length of the indoor board portion 1711. When a fire occurs and the heated foaming material 623 is heated, even if the frame airtight material 1712 melts and disappears, the foamed heated foaming material 623 closes the gap where the frame airtight material 1712 was attached. This makes it possible to prevent the penetration of flames through the gap between the lower frame 17a and the lower frame 181a. The lower frame 17a is provided with a hollow portion 171c.

[0224] The lower frame 181a has a metal frame member 183 and a resin frame member 184. The resin frame member 184 is disposed on the indoor side of the metal frame member 183. The metal frame member 183 has a frame protruding piece 1832 that protrudes from a main body portion 1831 that supports the face material 182 to the indoor side. The base end portion of the frame protruding piece 1832 on the main body portion 1831 side is indicated by the reference symbol 1832a. When the shoji 8D is disposed in the closed position, the frame protruding piece 1832 is disposed on the outdoor side of the indoor board portion 1711 of the metal frame member 171 of the lower frame 17a, and contacts the frame airtight material 1712 provided on the indoor board portion 1711. The resin frame member 184 has hollow portions 184a, 184b, 184c, 184d, 184e, and 184f formed therein. These six hollow sections 184a, 184b, 184c, 184d, 184e, and 184f are arranged in two rows in the indoor / outdoor direction, with three in each row in the vertical direction. The frame protruding piece 1832 and the hollow sections 184a, 184b, 184c, 184d, 184e, and 184f are arranged overlapping along the front view direction. The frame protruding piece 1832 and the hollow sections 184a, 184b, 184c, 184d, 184e, and 184f are arranged overlapping in the vertical direction. The frame protruding piece 1832 is arranged outside the front view direction of the hollow sections 184a, 184b, 184c, 184d, 184e, and 184f. The frame protruding piece 1832 is disposed below the hollow portions 184a, 184b, 184c, 184d, 184e, and 184f. In addition to the hollow portions 184a, 184b, 184c, 184d, 184e, and 184f, the lower frame 181a is formed with hollow portions 183b, 183e, 183f, and 183g. The heated foaming material 624 is provided on the surface of the groove bottom plate portion 1833 of the metal frame member 183 that faces the end surface of the face material 182, i.e., on the upper surface. The heated foaming material 624 is provided over the entire length of the groove bottom plate portion 1833. When a fire occurs and the heated foaming material 624 is heated, the heated foaming material 624 foams toward the face material 182.

[0225] The upper frame 17b has a metal frame member 174 and a resin frame member 175. The resin frame member 175 is disposed on the indoor side of the metal frame member 174. In the metal frame member 174, a frame airtight material 1742 is provided on an indoor board portion 1741 disposed on the indoor side. The frame airtight material 1742 is provided on the outdoor side of the indoor board portion 1741. A heat foaming material 625 is provided on the outdoor side surface of the indoor board portion 1741. The heat foaming material 625 is provided over the entire length of the indoor board portion 1741. When a fire occurs and the heat foaming material 625 is heated, even if the frame airtight material 1742 melts and disappears, the foamed heat foaming material 625 closes the gap where the frame airtight material 1742 was attached. This makes it possible to prevent the penetration of flames through the gap between the upper frame 17b and the upper frame 181b. The upper frame 17b is provided with hollow portions 174a, 174b, 174c, and 174e.

[0226] The upper frame 181b has a metal frame member 185 and a resin frame member 186. The resin frame member 186 is disposed on the indoor side of the metal frame member 185. The metal frame member 185 has a frame protruding piece 1852 that protrudes indoors from a main body 1851 that supports the surface material 182. The frame protruding piece 1852, the base end of which on the main body 1851 side is indicated by reference numeral 1852a, is disposed on the outdoor side of the indoor board 1741 of the metal frame member 174 of the upper frame 17b when the shoji screen 8D is disposed in the closed position, and comes into contact with the frame airtight material 1742 provided on the indoor board 1741. The resin frame member 186 has hollow portions 186a, 186b, 186c, 186d, 186e, and 186f formed therein. These six hollow sections 186a, 186b, 186c, 186d, 186e, and 186f are arranged in two rows in the indoor / outdoor direction, with three in each row in the vertical direction. The frame protruding piece 1852 and the hollow sections 186a, 186b, 186c, 186d, 186e, and 186f are arranged overlapping along the front view direction. The frame protruding piece 1852 and the hollow sections 186a, 186b, 186c, 186d, 186e, and 186f are arranged overlapping in the vertical direction. The frame protruding piece 1852 is arranged outside the front view direction of the hollow sections 186a, 186b, 186c, 186d, 186e, and 186f. The frame protruding piece 1852 is disposed above the hollows 186a, 186b, 186c, 186d, 186e, and 186f. In addition to the hollows 186a, 186b, 186c, 186d, 186e, and 186f, the upper frame 181b is also formed with hollows 185b, 185e, 185f, and 185g. The metal frame member 185 has a groove bottom plate portion 1853 on a surface facing the end surface of the face material 182, i.e., on the lower surface, a heating foaming material 626 is provided. The heating foaming material 626 is provided over the entire length of the groove bottom plate portion 1853. When a fire occurs and the heating foaming material 626 is heated, the heating foaming material 626 foams toward the face material 182.

[0227] As shown in FIG. 46, the first vertical frame 17c has a metal frame member 176 and a resin frame member 177. The resin frame member 177 is disposed on the indoor side of the metal frame member 176. In the metal frame member 176, a frame airtight material 1762 is provided on an indoor board portion 1761 disposed on the indoor side. The frame airtight material 1762 is provided on the outdoor side of the indoor board portion 1761. A heating foaming material 627 is provided on the outdoor side surface of the indoor board portion 1761. The heating foaming material 627 is provided over the entire length of the indoor board portion 1761. When a fire occurs and the heating foaming material 627 is heated, even if the frame airtight material 1762 melts and disappears, the foamed heating foaming material 627 closes the gap where the frame airtight material 1762 was attached. This makes it possible to prevent the penetration of flames through the gap between the first vertical frame 17c and the first vertical frame 181c. The first vertical frame 17c is provided with hollow portions 176a, 176b, and 176d.

[0228] The first vertical frame 181c has a metal frame member 187 and a resin frame member 188. The resin frame member 188 is disposed on the indoor side of the metal frame member 187. The metal frame member 187 has a frame protruding piece 1872 that protrudes indoors from a main body portion 1871 that supports the face material 182. The base end of the frame protruding piece 1872 on the main body portion 1871 side is indicated by reference symbol 1872a. When the shoji D is disposed in the closed position, the frame protruding piece 1872 is disposed on the outdoor side of the indoor board portion 1761 of the metal frame member 176 of the first vertical frame 17c, and comes into contact with a frame airtight material 1762 provided on the indoor board portion 1761. The resin frame member 188 has hollows 188a, 188b, 188c, 188d, 188e, 188f, and 188g. Six of these seven hollows, 186a, 186b, 186c, 186d, 186e, and 186f, are arranged in two rows in the indoor-outdoor direction, with three in each row in the width direction. The other hollow 188g is arranged on the outdoor side of the hollow 188d, which is arranged on the outdoor side and on the inner side in the width direction among the six hollows. The frame protruding piece 1872 and the hollows 188a, 188b, 188c, 188d, 188e, 188f, and 188g are arranged overlapping each other along the viewing direction. The frame protruding piece 1872 and the hollow portions 188a, 188b, 188c, 188d, 188e, 188f, and 188g overlap in the width direction. The frame protruding piece 1872 is disposed outside the hollow portions 188a, 188b, 188c, 188d, 188e, 188f, and 188g in the view direction. The frame protruding piece 1872 is disposed outside the hollow portions 188a, 188b, 188c, 188d, 188e, 188f, and 188g in the width direction. In addition to the hollow portions 188a, 188b, 188c, 188d, 188e, 188f, and 188g, the first vertical frame 181c is formed with the hollow portions 187b, 187c, 187d, and 187f.

[0229] A heated foaming material 628 is provided on the surface of the groove bottom plate portion 1873 of the metal frame member 187 that faces the end surface of the face material 182, i.e., on the inner surface in the width direction. The heated foaming material 628 is provided over the entire length of the groove bottom plate portion 1873. When a fire occurs and the heated foaming material 628 is heated, the heated foaming material 628 foams toward the face material 182. A heated foaming material 629 is provided on the outer surface in the width direction of the outer plate portion 1874 of the metal frame member 187 of the first vertical frame 181c. The heated foaming material 629 is provided over the entire length of the outer plate portion 1874. When a fire occurs and the heated foaming material 629 is heated, the heated foaming material 628 foams toward the first vertical frame 17c. The outer surface of the outer plate portion 1874 in the width direction is the surface that faces the inner plate portion 1763 of the first vertical frame 17c in the width direction when the shoji screen 8D is in the closed state.

[0230] The second vertical frame 17d has a shape that is generally symmetrical to the first vertical frame 17c in the width direction. In the drawings, the members and parts of the second vertical frame 17d that correspond to the first vertical frame 17c are indicated with the same reference numerals as the first vertical frame 17c. The second vertical frame 181d has a shape that is generally symmetrical to the first vertical frame 181c in the width direction. In the drawings, the members and parts of the second vertical frame 181d that correspond to the first vertical frame 181c are indicated with the same names and reference numerals as the first vertical frame 181c.

[0231] The fitting 1 according to the fourth embodiment has the same effect as the fitting 1C according to the third embodiment. By providing the heating foaming materials 624, 626, and 628 in the grooves 183a, 185a, and 187a of the frame 181, it is possible to prevent the penetration of flames through the grooves 183a, 185a, and 187a of the frame 181 in the event of a fire.

[0232] The present disclosure is not limited to the above-mentioned embodiments, and can be modified as appropriate. For example, in the above-mentioned embodiments, the surface material is a double-glazed glass, but it may be a single-pane glass or a double-glazed glass in which three or more pieces of glass are combined. The fittings in the above-mentioned embodiments are sashes for buildings, but they may be sashes for houses. In the first to fourth embodiments, an elastic body 323 and a sealing material 324 are provided between the surface material and the groove into which the surface material is fitted. A glazing channel or a bead may be provided between the surface material and the groove.

[0233] The present disclosure includes the following aspects. (1) A fitting comprising a frame body and a shoji screen provided inside the frame body, the frame body comprising a metal frame member made of metal and a resin frame member provided on the indoor side of the metal frame member, the shoji screen comprising a frame and a panel provided on the inside of the frame, the frame member comprising a metal frame member made of metal and a resin frame member having a hollow portion provided on the indoor side of the metal frame member, the metal frame member comprising a main body portion supporting the panel and a frame protruding piece protruding from the main body portion to the indoor side, the frame protruding piece coming into contact with a frame airtight material attached to the metal frame member. (2) The fixture described in (1) above, in which the frame protruding piece and the hollow portion are arranged overlapping each other along the viewing direction. (3) The fixture according to (1) or (2), wherein the frame protruding piece is positioned on the outside in the viewing direction of the hollow portion. (4) A fixture described in any one of (1) to (3), in which the outdoor end of the frame protruding piece is connected to the main body at a position outdoors rather than the indoor surface of the panel. (5) The fitting according to claim 1, wherein a first heat-foaming material is provided on the outer surface of the frame protruding piece in the viewing direction. (6) The metal frame member in the lower frame of the frame body has a frame protruding piece that protrudes to the outdoor side and has an end portion on the outdoor side to which the frame airtight material is attached, The fitting according to any one of (1) to (5), further comprising a second heated foaming material that, when foamed, closes the space below the frame protruding piece. (7) The door has an inner door installed on the indoor side and an outer door installed on the outdoor side, the outer door frame is in contact with a door frame airtight material installed on the inner door frame, and at least a part of the hollow portion is positioned between the indoor / outdoor position where the outer door frame and the door frame airtight material are in contact and the indoor / outdoor position where the frame protruding piece and the frame airtight material are in contact, as described in any one of (1) to (6). [Explanation of symbols]

[0234] 1,1B-1C fittings, 2,7,7D frame, 2a,7a,17a lower frame, 2b,7b,17b upper frame, 2c,7c,17c 1st vertical frame, 2d,7d,17d 2nd vertical frame, 3 outer shoji, 4 inner shoji, 8,8D Shoji, 21,24,27,29,71,74,76,171,174,176,178 Metal frame member, 23,26,28,30,73,75,77,173,175,177 Resin frame member, 31,41,81,181 Frame, 31a,41a,81a,181a Lower stile, 31b, 41b, 81b, 181b Upper stile, 31c, 41c Door end frame, 31d, 41d Door joint frame, 32, 42, 82, 182 Surface material, 33, 35, 37, 39, 43, 45, 49, 83, 85, 87, 183, 185, 187 Metal frame parts, 34, 36, 38, 40, 44, 46, 48, 50, 84, 86, 88, 184, 186, 188 Resin frame members, 34b, 34c, 36a, 36b, 38a, 38b, 44a, 44b, 46a, 46b, 48a, 48b, 84a, 84b, 86a, 88a, 88b, 184a, 184b, 184c,184d,184e,184f,186a,186b,186c,186d,186e,186f,188a,188b,188c,188d,188e,188f,188g Hollow part, 81c, 181c 1st stile, 81d, 181d Second vertical frame, 224, 227, 248, 251, 253, 276, 296, 355a, 721, 747, 767, 1712, 1742, 1762 Frame airtight material, 601-629 Heat foaming material, S1 Frame airtight material installation surface, S2 Joint frame airtight material installation surface

Claims

1. A frame body, A shoji screen is provided inside the frame body, The frame body is A metal frame member made of metal; A resin frame member provided on the indoor side of the metal frame member, The aforementioned shoji screen is Frame and A surface material provided on the inside of the frame, The frame is A metal frame member made of metal; A resin frame member provided on the indoor side of the metal frame member and having a hollow portion, The metal frame member is A main body portion that supports the face material; A frame protruding piece protruding from the main body portion to the indoor side, The frame protruding piece is a fixture that comes into contact with a frame airtight material attached to the metal frame member.

2. The fixture according to claim 1 , wherein the frame protruding piece and the hollow portion are arranged to overlap along the front direction.

3. The fixture according to claim 1 , wherein the frame protruding piece is positioned outside the hollow portion in the viewing direction.

4. The fixture according to claim 1 , wherein the outdoor end of the frame protruding piece is connected to the main body at a position on the outdoor side of the indoor surface of the panel.

5. The fixture according to claim 1 , wherein a first heat-foaming material is provided on an outer surface of the frame protruding piece in the facing direction.

6. The metal frame member in the lower frame of the frame body has a frame protruding piece that protrudes to the outdoor side and has an end portion on the outdoor side to which the frame airtight material is attached, 6. The fitting according to claim 5, further comprising a second heat-foaming material that, when foamed, closes the space below the frame protruding piece.

7. The aforementioned shoji screen is The inner shoji screen is installed on the indoor side, An exterior screen provided on the outdoor side; The outer shutter door joint frame contacts the joint frame airtight material provided on the inner shutter door joint frame, The building fixture described in claim 1, wherein at least a portion of the hollow portion is positioned between the indoor / outdoor position where the outer screen sill and the sill airtight material come into contact and the indoor / outdoor position where the sill protruding piece and the frame airtight material come into contact.

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