Doors and windows

Abstract

To provide a joinery piece that allows for easy attachment of multiple covering materials to the frame or stile of a sliding door. [Solution] A joinery comprising a frame and a sliding door disposed on the inner circumference of the frame, wherein at least one of the frame or the sliding door frame has a constituent member that constitutes the frame or frame, and a first covering material and a second covering material disposed on the outer surface of the constituent member, with one end of the first covering material and the end of the second covering material facing each other, the constituent member having an engaging portion that engages with the other end of the first covering material, the first covering material being engaged at the engaging portion via an elastic material, and the second covering material being fixed to the constituent member.

Description

Technical Field

[0001] The present disclosure relates to a building fitting.

Background Art

[0002] Conventionally, a building fitting having a composite structure in which a frame body or a stile / rail body of a sash includes a metal material and a non-metallic covering material such as wood that covers the surface of the metal material is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] A plurality of covering materials are arranged on the surface of a constituent member of a frame body or a stile / rail body of a sash. In consideration of the design properties of the building fitting, the plurality of covering materials are arranged such that no gap is formed therebetween, and are individually fixed to the constituent member by fixing means such as screws and adhesives. Therefore, the positioning work and mounting work for the plurality of covering materials are complicated.

[0005] An object of the present disclosure is to provide a building fitting that allows a plurality of covering materials to be easily mounted on a frame body or a stile / rail body of a sash.

Means for Solving the Problem

[0006] This disclosure relates to a joinery comprising a frame and a sliding door disposed on the inner circumference side of the frame, wherein at least one of the frame or the frame of the sliding door has a constituent member constituting the frame or the frame, and a first covering material and a second covering material disposed on the outer surface of the constituent member, one end of the first covering material and the end of the second covering material are arranged facing each other, the constituent member has an engaging portion that engages with the other end of the first covering material, the first covering material is engaged at the engaging portion via an elastic material, and the second covering material is fixed to the constituent member. [Brief explanation of the drawing]

[0007] [Figure 1] This is a front view of the joinery according to this embodiment, as seen from the outside. [Figure 2] This is a front view of the door / window according to this embodiment, as seen from the interior side. [Figure 3] This is a longitudinal cross-sectional view of the joinery according to this embodiment. [Figure 4] This is a cross-sectional view showing one of the vertical frames of the joinery according to this embodiment. [Figure 5] This is a cross-sectional view showing the other vertical frame side of the joinery according to this embodiment. [Figure 6] This is a cross-sectional view showing the butt joint of the joinery according to this embodiment. [Figure 7] This is a cross-sectional view showing one of the meeting stiles of the door / window fitting according to this embodiment. [Figure 8] This is a vertical cross-sectional view showing an enlarged view of the upper frame of the sliding door of the building fitting according to this embodiment. [Figure 9] This is a longitudinal cross-sectional view showing a disassembled portion of the upper frame structure shown in Figure 8. [Figure 10] This is a magnified vertical cross-sectional view of the lower frame of the sliding door of the building fitting according to this embodiment. [Figure 11] This is a longitudinal cross-sectional view showing a disassembled portion of the lower frame structure shown in Figure 10. [Figure 12] This is a cross-sectional view showing a disassembled portion of the structure of the meeting stile inner frame shown in Figure 6. [Figure 13]It is an enlarged cross-sectional view showing the left side portion of the meeting inner stile shown in Figure 6. [Figure 14] It is an enlarged cross-sectional view showing the right side portion of the meeting stile shown in Figure 6. [Figure 15] It is an exploded cross-sectional view showing a part of the configuration of the butt stile shown in Figure 7. [Figure 16] It is an enlarged cross-sectional view showing the right side portion of the butt stile shown in Figure 15. [Figure 17] It is an exploded vertical cross-sectional view showing a part of the configuration of the door leading stile of the outer shoji shown in Figure 4. [Figure 18] It is a vertical cross-sectional view showing another embodiment of the top rail shown in Figure 8. [Figure 19] It is a vertical cross-sectional view showing another embodiment of the bottom rail shown in Figure 10. [Figure 20] It is a cross-sectional view showing another embodiment of the meeting inner stile shown in Figure 6. [Figure 21] It is a cross-sectional view showing another embodiment of the butt stile shown in Figure 7. [Figure 22] It is a cross-sectional view showing another embodiment of the door leading stile shown in Figure 4. [Figure 23] It is a cross-sectional view showing one vertical frame side of a double sliding window provided with two shoji panels. [Figure 24] It is a front view of a casement window, which is a fitting according to another embodiment, viewed from the outdoor side. [Figure 25] It is a vertical cross-sectional view of a casement window, which is a fitting according to another embodiment. [Figure 26] It is a cross-sectional view of a casement window, which is a fitting according to another embodiment. [Figure 27] It is an enlarged view of part A in Figure 25. [Figure 28] It is an enlarged view of part B in Figure 25. [Figure 29] It is an enlarged view of part C in Figure 26. [Figure 30] It is an enlarged view of part D in Figure 26. [Figure 31] It is a front view of a fixed window, which is a fitting according to another embodiment, viewed from the outdoor side. [Figure 32]This is a vertical cross-sectional view of a fixed window, which is a building component according to another embodiment. [Figure 33] This is a cross-sectional view of a fixed window, which is a building component according to another embodiment. [Figure 34] This is an enlarged view of section E in Figure 32. [Figure 35] This is an enlarged view of section F in Figure 32. [Figure 36] This is an enlarged view of section G in Figure 33. [Figure 37] This is an enlarged view of section H in Figure 33. [Modes for carrying out the invention]

[0008] The embodiments of this disclosure will be described in detail below with reference to the drawings.

[0009] <Joinery> This embodiment shows a sliding window 1 as a building fixture, which is installed in a rectangular opening 110 of a building frame 100. The sliding window 1 has a height of 2500 mm or more and is composed of a frame 2 installed in the opening 110 and four sashes 3 to 6 that are housed on the inner circumference of the frame 2 so as to be slidable in the horizontal direction.

[0010] The four sliding doors 3-6 consist of two inner doors 3 and 4 that slide along the same indoor rail, and two outer doors 5 and 6 that slide along the same outdoor rail. As shown in Figures 3-5, exterior material 120 is provided on the outdoor X1 surface of the building frame 100 on the outer perimeter of the sliding window 1.

[0011] Here, we define the directions in the figure. X1 indicates the exterior side of the sliding window 1, and X2 indicates the interior side of the sliding window 1. The X1-X2 direction indicates the depth direction of the sliding window 1. In the sliding window 1, the surface arranged along the depth direction is defined as the depth surface. The width direction perpendicular to the depth direction indicates the visible side of the sliding window 1. In the sliding window 1, the surface arranged along the visible side is defined as the visible side. In the visible side, the outside of the frame 2 is defined as the outer circumference side, and the inside of the frame 2 is defined as the inner circumference side.

[0012] <Frame> The frame 2 is constructed by framing an upper frame 21 extending horizontally over the top of the opening 110, a lower frame 22 extending horizontally over the bottom of the opening 110, and a pair of left and right vertical frames 23 and 24 extending vertically over the left and right vertical parts of the opening 110, in a rectangular shape around all four sides. As shown in Figures 3 to 5, frame members 130 (upper frame member 131, lower frame member 132, and vertical frame members 133 and 134) are attached to the indoor side X2 of the frame 2 around all four sides, top, bottom, left, and right.

[0013] [Top frame] As shown in Figure 3, the upper frame 21 is divided into an outdoor upper frame member 211 and an indoor upper frame member 212. The outdoor upper frame member 211 and the indoor upper frame member 212 are made of extruded metal profiles such as aluminum. The outdoor upper frame member 211 and the indoor upper frame member 212 are connected by a bridge member 213 made of resin or other heat-insulating material. The upper frame 21 has an outdoor upper rail 21a, an indoor upper rail 21b, and an upper rail 21c for the screen door, which protrude toward the lower frame 22. In this embodiment, the screen door is not shown.

[0014] The outdoor upper frame member 211 has an outer panel portion 211a, an inner panel portion 211b, an outdoor panel portion 211c, an indoor panel portion 211d, a frame mounting plate portion 211e, and a partition plate portion 211f. The frame mounting plate portion 211e protrudes outward from the indoor side X2 end of the outer panel portion 211a. The frame mounting plate portion 211e extends along the extension direction of the upper frame 21 and abuts against the side surface of the outdoor side X1 of the building frame 100. The partition plate portion 211f is formed across the outer panel portion 211a and the inner panel portion 211b and extends along the extension direction of the upper frame 21. As a result, two hollow portions S1a and S1b are formed inside the outdoor upper frame member 211, separated by the partition plate portion 211f in the depth direction. The outdoor upper rail 21a protrudes inward from the position where the partition plate portion 211f is provided in the inner plate portion 211b. The screen door upper rail 21c protrudes inward from the outdoor end portion X1 of the outdoor upper frame member 211.

[0015] The indoor upper frame member 212 extends from the bridge member 213 toward the indoor side X2. The indoor upper rail 21b protrudes inward from the end of the outdoor side X1 on the indoor upper frame member 212. The indoor upper frame member 212 is positioned in contact with the inner surface of the opening 110.

[0016] An outdoor resin cover 214 is attached between the outdoor upper rail 21a and the indoor upper rail 21b of the upper frame 21. An indoor resin cover 215 is attached from the indoor side X2 of the indoor upper rail 21b along the inner surface of the indoor upper frame member 212. An angle portion 216 made of resin is integrally formed at the indoor end of the indoor resin cover 215, extending toward the indoor side X2. The angle portion 213 may be made of metal. The angle portion 216 is attached to the inner circumferential surface 131a of the upper frame member 131, which is located on the indoor side X2 of the upper frame 21, by screws (not shown).

[0017] [Bottom frame] As shown in Figure 3, the lower frame 22 is divided into an outdoor lower frame member 221 and an indoor lower frame member 222. The outdoor lower frame member 221 and the indoor lower frame member 222 are made of extruded metal profiles such as aluminum. The outdoor lower frame member 221 and the indoor lower frame member 222 are connected by a bridge member 223 made of resin or other heat-insulating material. The lower frame 22 has an outdoor lower rail 22a, an indoor lower rail 22b, and a screen door lower rail 22c, which protrude toward the upper frame 21.

[0018] The outdoor lower frame member 221 has an outer panel portion 221a, an inner panel portion 221b, an outdoor panel portion 221c, an indoor panel portion 221d, and a building frame mounting plate portion 221e. As a result, a hollow portion S2a is formed inside the rectangular area enclosed by the outer panel portion 221a, the inner panel portion 221b, the outdoor panel portion 221c, and the indoor panel portion 221d within the outdoor lower frame member 221. The building frame mounting plate portion 221e protrudes outward from the end of the indoor side X2 of the outer panel portion 221a. The building frame mounting plate portion 221e extends along the extension direction of the lower frame 22 and abuts against the side surface of the outdoor side X1 of the building frame 100. The outdoor lower rail 22a protrudes inward from the inner panel portion 221b. The bottom rail 22c for the screen door protrudes inward from the end of the outdoor side X1 of the outdoor side bottom frame member 221. Multiple drainage members 221f are attached to the outdoor side plate portion 221c for draining water that has entered the hollow portion S2a to the outdoor side X1.

[0019] The indoor lower frame member 222 has an outer panel portion 222a, an inner panel portion 222b, an outdoor panel portion 222c, and an indoor panel portion 222d. As a result, a hollow portion S2b is formed inside the indoor lower frame member 222, within the rectangular area enclosed by the outer panel portion 222a, the inner panel portion 222b, the outdoor panel portion 222c, and the indoor panel portion 222d. The indoor lower rail 22b protrudes inward from the indoor side X2 end of the inner panel portion 222b.

[0020] The indoor lower frame member 222 has an outdoor leg portion 222e that protrudes outward from the outdoor end X1 of the outer panel portion 222a, and an indoor leg portion 222f that protrudes outward from the indoor end X2 of the outer panel portion 222a. The outer end of the indoor leg portion 222f is provided with a mounting piece 222g that extends toward the indoor side X2. The indoor lower frame member 222 is positioned in contact with the inner circumferential surface of the opening 110 by the outdoor leg portion 222e, the indoor leg portion 222f, and the mounting piece 222g.

[0021] An outdoor resin cover 224 is attached between the outdoor lower rail 22a and the indoor lower rail 22b of the lower frame 22. An indoor resin cover 225 is attached from the indoor side X2 of the indoor lower rail 22b along the inner plate portion 222b of the indoor lower frame member 222. A resin angle portion 226 extending toward the indoor side X2 is attached to the indoor plate portion 222d of the indoor lower frame member 222. The angle portion 226 may be made of metal. The angle portion 226 is attached to the inner circumferential surface 132a of the lower frame member 132, which is located on the indoor side X2 of the lower frame 22, by screws (not shown).

[0022] [Vertical frame] As shown in Figures 4 and 5, the left and right pair of vertical frames 23 and 24 have the same structure and are arranged symmetrically. The vertical frames 23 and 24 are made of extruded metal profiles such as aluminum and integrally include vertical frame bodies 231 and 241, structural mounting plate portions 232 and 242, and indoor side plate portions 233 and 243. The vertical frame bodies 231 and 241 extend in a flat plate shape in the depth direction. The structural mounting plate portions 232 and 242 protrude outward from near the center in the depth direction on the outer peripheral surfaces 231a and 241a of the vertical frame bodies 231 and 241. The structural mounting plate portions 232 and 242 abut against the side surface X1 of the building structure 100. The indoor side plate portions 233 and 243 protrude inward from the ends X2 of the indoor side of the vertical frame bodies 231 and 241.

[0023] On the inner circumferential surfaces 231b, 241b of the vertical frame bodies 231, 241 in the vertical frames 23, 24, engaging projections 234, 244 protrude inward, engaging with the door frame 54, 64 of the outer sash 5, 6 when closed. The structural mounting plate portions 232, 242, the interior side plate portions 233, 243, and the engaging projections 234, 244 extend along the extension direction of the vertical frames 23, 24. In the vertical frames 23, 24, the interior side X2 portion of the structural mounting plate portions 232, 242 is positioned in contact with the inner circumferential surface of the opening 110 of the building structure 100.

[0024] As shown in Figures 4 and 5, resin angle sections 235 and 245 are attached to the ends of the indoor side X2 of the vertical frames 23 and 24, extending from the inner circumferential surfaces 231b and 241b of the vertical frame bodies 231 and 241 along the indoor side plate sections 233 and 243. The angle sections 235 and 245 may also be made of metal. The angle sections 235 and 245 are attached to the inner circumferential surfaces 133a and 134a of the vertical frame members 133 and 134, which are positioned on the indoor side X2 of the vertical frames 23 and 24, by screws (not shown).

[0025] Attachments 236 and 246 are attached to the inner circumferential surfaces 231b and 241b of the vertical frame bodies 231 and 241 of the vertical frames 23 and 24, at a location X2 on the indoor side of the outer sash 5 and 6 when closed. Attachments 236 and 246 are components of the vertical frames 23 and 24. Attachments 236 and 246 have inner plate portions 236a and 246a facing the inner circumferential side, and leg portions 236b and 246b that protrude outward from the inner plate portions 236a and 246a and abut against the inner circumferential surfaces 231b and 241b of the vertical frame bodies 231 and 241. The outdoor-side ends X1 of attachments 236 and 246 engage with engaging pieces 231c and 241c that protrude from the inner circumferential surfaces 231b and 241b of the vertical frame bodies 231 and 241. The interior-side ends X2 of attachments 236 and 246 engage with the portions of angle sections 235 and 245 that are aligned with the interior-side plate sections 233 and 243.

[0026] Vertical frame covering materials 237 and 247 are provided on the inner panel portions 236a and 246a of the attachments 236 and 246. The vertical frame covering materials 237 and 247 are decorative materials that cover the portion of the vertical frames 23 and 24 that is on the interior side X2 of the outer sashes 5 and 6, thereby improving the aesthetic appearance of the sliding window 1 when viewed from the interior side X2. The vertical frame covering materials 237 and 247 are made of the same material as the frame covering materials provided on the frame bodies 30, 40, 50, and 60 of each of the sashes 3 to 6 described later. In this embodiment, board-shaped wood is used for the vertical frame covering materials 237 and 247. In this case, it is preferable that the frame member 130 that extends around all four sides, along with the vertical frame covering materials 237 and 247, is also made of the same material as the frame covering materials provided on the frame bodies 30, 40, 50, and 60 of each of the sashes 3 to 6 described later. The use of the same material on the interior side X2 of the sliding window 1 provides an overall sense of unity, further enhancing the design.

[0027] The vertical frame covering materials 237 and 247 are fixed to the inner panel portions 236a and 246a by screws 237b and 247b driven in from the back side of the inner panel portions 236a and 247a, with multiple double-sided adhesive tapes 237a, 237a, 247a, and 247a interposed between them. As a result, in the vertical frames 23 and 24, the space between the door frame 54 and 64 of the closed outer sliding door 5 and 6 and the angle portions 235 and 245 is covered by the vertical frame covering materials 237 and 247. As shown in Figures 4 and 5, the inner circumferential surfaces 237c and 274c of the vertical frame covering materials 237 and 247 are arranged substantially flush with the inner circumferential surfaces 133a and 134a of the angle portions 235 and 245 and the vertical frame members 133 and 134. Multiple double-sided adhesive tapes 237a, 237a, 247a, 247a extend along the extension direction of the vertical frames 23, 24 and are spaced apart from each other in the depth direction. As a result, a gap equivalent to the thickness of the double-sided adhesive tapes 237a, 247a is formed between the vertical frame covering material 237, 247 and the inner panel portion 236a, 246a. This gap constitutes a ventilation channel. This allows for drainage even if condensation occurs on the inner panel portion 236a, 247a, and prevents the vertical frame covering material 237, 247 from coming into contact with the condensation and getting wet, while also promoting drying through ventilation. The double-sided adhesive tapes 237a, 247a may be formed in long lengths and arranged along the entire length in the extension direction of the vertical frames 23, 24, or they may be formed in short lengths and arranged in fragments at intervals along the extension direction of the vertical frames 23, 24.

[0028] When the vertical frame covering materials 237, 247 and the inner plate portions 236a, 246a are fixed together with screws, the member interposed between them can be any gap-forming member having a thickness that allows for the formation of a gap constituting a ventilation channel, and is not necessarily limited to the double-sided adhesive tapes 237a, 247a. Examples of gap-forming members other than the double-sided adhesive tapes 237a, 247a include elastic members made of rubber, resin, etc., in the form of tape or sheets.

[0029] Attachments 236 and 246 are made of metal or resin, for example. If attachments 236 and 246 are made of metal, they are made of aluminum, for example, but are not limited to aluminum. Because attachments 236 and 246 are made of metal or resin, it is possible to suppress the deterioration of attachments 236 and 246 over time compared to wood. If attachments 236 and 246 are made of resin, it is possible to improve the thermal insulation of the vertical frames 23 and 24 on the interior side X2 of the outer sashes 5 and 6.

[0030] <Shoji screen> The inner sashes 3 and 4 are positioned on the indoor side X2 of the inner circumference of the frame 2 and are mounted so as to be slidable from side to side across the indoor upper rail 21b of the upper frame 21 and the indoor lower rail 22b of the lower frame 22. The outer sashes 5 and 6 are positioned on the outdoor side X1 of the inner circumference of the frame 2 and are mounted so as to be slidable from side to side across the outdoor upper rail 21a of the upper frame 21 and the outdoor lower rail 22a of the lower frame 22.

[0031] [Inner and outer shoji screens] As shown in Figures 1 and 2, the interior sliding door 3 is constructed by assembling an upper frame 31, a lower frame 32, a vertical frame consisting of a meeting stile 33 and a butt stile 34 into a rectangular frame, with the facing material G housed inside the frame body 30. As shown in Figure 3, in this embodiment, the facing material G consists of double-glazed glass having two panes of glass Ga,Ga laminated with spacers Gb extending along all four peripheries. However, the facing material G is not limited to double-glazed glass; it may also consist of single-layer glass or triple-layer glass. The facing material G may consist of four or more panes of glass. The facing material G may also consist of a panel that does not transmit light. As shown in Figures 2 and 6, a crescent lock 35 is attached to the visible surface 33a of the meeting stile 33.

[0032] As shown in Figures 1 and 2, the interior sliding door 4 is constructed by assembling an upper frame 41, a lower frame 42, and vertical frames, namely the meeting stiles 43 and butt stiles 44, into a rectangular frame body 40, with the same facing material G as that of the interior sliding door 3 housed inside. As shown in Figure 2, a crescent lock 45 is attached to the visible surface 43a of the meeting stile 43. Note that the meeting stile 43 of the interior sliding door 4 has the same structure as the meeting stile 33 of the interior sliding door 3 shown in Figure 6, and is arranged symmetrically to Figure 6; therefore, the illustration of the meeting stile 43 of the interior sliding door 4 corresponding to Figure 6 is omitted.

[0033] As shown in Figures 1 and 2, the outer sliding door 5 is constructed by assembling an upper frame 51, a lower frame 52, a vertical frame called a meeting stile outer frame 53, and a door edge frame 54 into a rectangular frame structure, with the same facing material G as the inner sliding door 3 housed inside the frame body 50. As shown in Figure 6, the meeting stile outer frame 53 is fitted with a crescent receiver 55 that engages with the crescent lock 35 of the inner sliding door 3 when closed to lock it.

[0034] As shown in Figures 1 and 2, the outer sliding door 6 is constructed by assembling an upper frame 61, a lower frame 62, a vertical frame called a meeting stile outer frame 63, and a door edge frame 64 into a rectangular frame body 60, with the same facing material G as the inner sliding door 3 housed inside. The meeting stile outer frame 63 is fitted with a crescent receiver that engages with the crescent lock 45 of the inner sliding door 4 when closed to lock it. However, the meeting stile outer frame 63 of the outer sliding door 6 has the same structure as the meeting stile outer frame 53 of the outer sliding door 5 shown in Figure 6, and is arranged symmetrically to Figure 6, so the illustration of the meeting stile outer frame 63 of the outer sliding door 6 corresponding to Figure 6 is omitted.

[0035] The frame bodies 30, 40, 50, and 60 of the inner sashes 3 and 4 and the outer sashes 5 and 6 each have a composite structure composed of metal and non-metallic materials. Thus, the sliding window 1 constitutes a composite sash. In the frame bodies 30, 40, 50, and 60, the upper frames 31, 41, 51, and 61 have the same structure, and the lower frames 32, 42, 52, and 62 have the same structure. Therefore, these configurations will be explained with reference to the common drawings shown in Figures 8 to 11.

[0036] [Upper frame of inner and outer shoji screens] As shown in Figure 8, the upper frames 31, 41, 51, and 61 are composed of an upper frame body 1100, an attachment 1200, and an upper frame covering material 1300.

[0037] (Upper frame main body) The upper frame body 1100 is made of an extruded metal profile such as aluminum and is composed of an outdoor wall portion 1110, an indoor wall portion 1120, an inner circumferential wall portion 1130, and an outer circumferential wall portion 1140. The inner circumferential wall portion 1130 is positioned at the inner circumferential ends of the outdoor wall portion 1110 and the indoor wall portion 1120, connecting the outdoor wall portion 1110 and the indoor wall portion 1120 in the depth direction (left-right direction in Figure 8). The outer circumferential wall portion 1140 is positioned midway in the visible direction (up-down direction in Figure 8) of the outdoor wall portion 1110 and the indoor wall portion 1120, connecting the outdoor wall portion 1110 and the indoor wall portion 1120 in the depth direction. As a result, the upper frame body 1100 has a hollow section S11 inside the rectangular area enclosed by the exterior wall section 1110, the interior wall section 1120, the inner peripheral wall section 1130, and the outer peripheral wall section 1140.

[0038] The outdoor wall portion 1110 and the indoor wall portion 1120 each extend outward beyond the position of the outer peripheral wall portion 1140. As a result, rail engagement grooves 1150 are formed on the outer peripheral side of the upper frames 31, 41, 51, and 61. A fin member 1111 is attached to the outer peripheral end of the outdoor wall portion 1110, projecting toward the indoor side X2. The fin member 1111 is made of an elastic material such as rubber and is provided in an elongated shape along the extension direction of the upper frames 31, 41, 51, and 61. The fin member 1111 ensures airtightness by contacting the outdoor upper rail 21a or the indoor upper rail 21b from the outdoor side X1.

[0039] The exterior wall portion 1110 extends further inward than the position of the interior wall portion 1130. As a result, the upper frame body 1100 has a panel support portion 1160 that supports the exterior surface X1 of the panel material G.

[0040] Tapping holes 1141 are formed in the outer peripheral wall portion 1140, protruding into the hollow portion S11. Screws (not shown) are driven into the tapping holes 1141 to fasten the upper ends of the meeting stiles 33, 43 and butt stiles 34, 44 of the inner sliding doors 3, 4, which are arranged vertically at both ends of the upper frames 31, 41, 51, 61, as well as the meeting stiles 53, 63 and door edge stiles 54, 64 of the outer sliding doors 5, 6.

[0041] (attachment) Attachment 1200 is a component that makes up the upper frame 31, 41, 51, and 61. Attachment 1200 is positioned to cover the visible surface X2 on the indoor side of the upper frame body 1100 along its entire length in the extending direction. Attachment 1200 is composed of an outdoor wall portion 1210, an indoor wall portion 1220, an inner peripheral wall portion 1230, and an outer peripheral wall portion 1240, and has a hollow portion S12 inside the rectangular area enclosed by these portions. Attachment 1200 is a hollow member that is thinner in the depth direction than the upper frame body 1100.

[0042] The outer and inner ends of the outer wall portion 1210 are provided with an outer upper engaging portion 1211 and an outer lower engaging portion 1212, which project in an L-shape toward the outer side X1, respectively. The outer upper engaging portion 1211 engages with the outer end of the indoor wall portion 1120 of the upper frame body 1100. The outer lower engaging portion 1212 engages with an L-shaped piece 1121 that is provided on the inner end of the indoor wall portion 1120 of the upper frame body 1100, projecting toward the indoor side X2. As a result, the attachment 1200 is attached to the upper frame body 1100 so as to cover the visible surface of the indoor side X2 of the upper frame body 1100.

[0043] When the upper frame body 1100 and the attachment 1200 are assembled, a hollow section S13 is formed between the indoor wall portion 1120 of the upper frame body 1100 and the outdoor wall portion 1210 of the attachment 1200. In the upper frames 31, 41, 51, and 61, the hollow sections S12 and S13 are positioned on the indoor side X2 of the metal upper frame body 1100, which suppresses heat transfer in the depth direction and provides excellent thermal insulation.

[0044] The interior wall portion 1220 extends further inward than the inner circumferential wall portion 1230. As a result, the attachment 1200 has a panel support portion 1250 that supports the interior X2 surface of the panel G. The upper end of the panel G is housed and supported between the panel support portion 1160 and the panel support portion 1250.

[0045] The attachment 1200 is made of, for example, metal or resin. If the attachment 1200 is made of metal, it is made of, for example, aluminum, but is not limited to aluminum. Because the attachment 1200 is made of metal or resin, the processing accuracy of the attachment 1200 as a support part for the facing material can be increased compared to the case where the indoor side X2 of the facing material G is supported by a wooden facing material support part, and deterioration of the attachment 1200 over time can be suppressed. As a result, it is possible to suppress the facing material G from easily coming off the upper frames 31, 41, 51, and 61. If the attachment 1200 is made of resin, it is possible to suppress the outdoor side of the upper frame covering material 1300, described later, from being cooled by cold air from the outdoor side X1, thereby improving the thermal insulation performance.

[0046] The outer peripheral end of the interior wall portion 1220 has a protruding piece 1221 that is flush with the outer peripheral wall portion 1240 and protrudes toward the interior X2. The inner peripheral end of the panel support portion 1250 has a protruding piece 1251 that is parallel to the protruding piece 1221 and protrudes toward the interior X2.

[0047] (Top stile covering material) The upper frame covering material 1300 is a non-metallic frame covering material that constitutes the visible surface of the interior side X2 of the upper frames 31, 41, 51, and 61, and is arranged to cover the visible surface of the interior side X2 of the attachment 1200 along the entire length in the extension direction of the upper frames 31, 41, 51, and 61. The upper frame covering material 1300 is a decorative material that improves the aesthetic appearance of the sliding window 1 when viewed from the interior side X2, and in this embodiment a long, flat piece of wood is used, but it is not particularly limited. The upper frame covering material 1300 may be, for example, a ceramic plate, tile, glass, resin plate, etc.

[0048] The wood is not limited to a single plank of natural wood, but may also be made of MDF (Medium Density Fiberboard) formed from wood fibers, plywood made by laminating thin veneers, or artificial wood obtained by mixing wood powder and resin. The natural wood may also be treated with chemical treatments such as acetylation.

[0049] As shown in Figure 9, the upper frame covering material 1300 is attached to the indoor wall portion 1220 of the attachment 1200 by interposing multiple double-sided adhesive tapes 1400, 1400 between it and the indoor wall portion 1220. Notches 1310, 1320 are formed at the outer and inner ends of the upper frame covering material 1300, respectively, and are cut out in a stepped manner so as to open toward the outdoor side X1, extending along the entire length of the upper frame covering material 1300 in the extending direction. The notches 1310, 1320 engage with a pair of upper and lower protruding pieces 1221, 1251 of the attachment 1200 from the indoor side X2. At this time, the protruding pieces 1221, 1251 are fitted into and housed within the notches 1310, 1320, and are covered from the indoor side X2 by the upper frame covering material 1300. Therefore, the attachment 1200 is difficult to see from the interior side X2. The upper frame covering material 1300 may be fixed to the interior wall portion 1220 of the attachment 1200 by driving screws (not shown) from the interior side X2 of the attachment 1200, in addition to using multiple double-sided adhesive tapes 1400, 1400.

[0050] A stepped portion 1222 is formed at the boundary between the interior wall portion 1220 and the panel support portion 1250. As shown in Figure 9, the visible surface 1220a on the interior side X2 of the interior wall portion 1220 is set back on the exterior side X1 than the visible surface 1250a on the interior side X2 of the panel support portion 1250, with the stepped portion 1222 as the boundary. Multiple double-sided adhesive tapes 1400, 1400 are placed on the visible surface 1220a on the interior side X2 of the interior wall portion 1220, spaced apart from each other in the vertical visible direction, and extending parallel to the extension direction of the attachment 1200.

[0051] The upper frame covering material 1300 is positioned across the interior wall portion 1220 and the surface material support portion 1250 of the attachment 1200 via multiple double-sided adhesive tapes 1400, 1400, thereby creating a gap between the attachment 1200 and the upper frame covering material 1300 that corresponds to the thickness of the double-sided adhesive tape 1400. This gap constitutes a ventilation channel. As a result, even if condensation occurs on the visible surface 1220a of the interior wall portion 1220 of the attachment 1200, drainage is possible, and it is possible to prevent the upper frame covering material 1300 from coming into contact with the condensation and getting wet, and further promote drying through ventilation. The double-sided adhesive tape 1400 may be provided along the entire length of the upper frame 31, 41, 51, 61 in the extending direction, or it may be provided in fragments at intervals in the extending direction of the upper frame 31, 41, 51, 61 in order to ensure good ventilation in the vertical direction.

[0052] When the attachment 1200 and the upper frame covering material 1300 are fixed together with screws, the member interposed between them can be any gap-forming member having a thickness that allows for the formation of a gap constituting a ventilation channel, and is not necessarily limited to the double-sided adhesive tape 1400. Examples of gap-forming members other than the double-sided adhesive tape 1400 include elastic members made of rubber, resin, etc., in the form of tape or sheets.

[0053] [Lower frame of inner and outer shoji screens] As shown in Figure 10, the bottom frames 32, 42, 52, and 62 are constructed with a bottom frame body 2100, an attachment 2200, and a bottom frame covering material 2300.

[0054] (Bottom frame main body) The upper frame body 2100 is made of an extruded metal profile such as aluminum and is composed of an outdoor wall portion 2110, an indoor wall portion 2120, an inner peripheral wall portion 2130, and an outer peripheral wall portion 2140. The inner peripheral wall portion 2130 is positioned at the inner peripheral ends of the outdoor wall portion 2110 and the indoor wall portion 2120, connecting the outdoor wall portion 2110 and the indoor wall portion 2120 in the depth direction (left-right direction in Figure 10). The outer peripheral wall portion 2140 is positioned slightly closer to the inner peripheral side than the outer peripheral ends of the outdoor wall portion 2110 and the indoor wall portion 2120, connecting the outdoor wall portion 2110 and the indoor wall portion 2120 in the depth direction. As a result, the lower frame body 2100 has a hollow section S21 inside the rectangular area enclosed by the exterior wall section 2110, the interior wall section 2120, the inner peripheral wall section 2130, and the outer peripheral wall section 2140.

[0055] The outdoor wall portion 2110 and the indoor wall portion 2120 each extend outward beyond the position of the outer peripheral wall portion 2140. As a result, rail engagement grooves 2150 are formed on the outer peripheral side of the lower frames 32, 42, 52, and 62. A fin member 2111 is attached to the outer peripheral end of the outdoor wall portion 2110, projecting toward the indoor side X2. The fin member 2111 is made of an elastic material such as rubber and is provided in an elongated shape along the extension direction of the lower frames 32, 42, 52, and 62. The fin member 2111 ensures airtightness by abutting against the outdoor lower rail 22a or the indoor lower rail 22b from the outdoor side X1.

[0056] The exterior wall portion 2110 extends further inward than the position of the interior wall portion 2130. As a result, the lower frame body 2100 has a panel support portion 2160 that supports the exterior surface X1 of the panel G.

[0057] A door roller 2170 is housed in the hollow section S21 between the exterior wall section 2110 and the interior wall section 2120. The door roller 2170 protrudes below the outer peripheral wall section 2140 and is rotatably mounted on either the exterior lower rail 22a or the interior upper rail 22b.

[0058] The inner circumferential side wall portion 2130 has tapping holes 2131 that protrude inward. Screws (not shown) are driven into the tapping holes 2131 to fasten the lower ends of the meeting stiles 33, 43 and butt stiles 34, 44 of the inner sliding doors 3, 4, which are arranged vertically at both ends of the lower frames 32, 42, 52, 62, the meeting stiles 53, 63 and door edge stiles 54, 64 of the outer sliding doors 5, 6.

[0059] (attachment) Attachment 2200 is a component of the lower frame 32, 42, 52, and 62. Attachment 2200 is positioned to cover the visible surface X2 on the indoor side of the lower frame body 2100 along its entire length in the extension direction. Attachment 2200 is composed of an outdoor wall portion 2210, an indoor wall portion 2220, an inner peripheral wall portion 2230, and an outer peripheral wall portion 2240, and has a hollow portion S22 inside the rectangular area enclosed by these portions. Attachment 2200 is a hollow member that is thinner in the depth direction than the upper frame body 2100.

[0060] The inner and outer ends of the outer wall portion 2210 are provided with an outer upper engaging portion 2211 and an outer lower engaging portion 2212, which project in an L-shape toward the outer side X1. The outer upper engaging portion 2211 engages with an L-shaped piece 2131 provided at the inner side wall portion 2130 of the lower frame body 2100 on the indoor side X2. The outer lower engaging portion 2212 engages with the outer end of the indoor side wall portion 2120 of the lower frame body 2100. As a result, the attachment 2200 is attached to the lower frame body 2100 so as to cover the visible surface of the indoor side X2 of the lower frame body 2100.

[0061] When the lower frame body 2100 and the attachment 2200 are assembled, a hollow section S23 is formed between the indoor wall portion 2120 of the lower frame body 2100 and the outdoor wall portion 2210 of the attachment 2200. In the lower frames 32, 42, 52, and 62, the hollow sections S22 and S23 are positioned on the indoor side X2 of the metal lower frame body 2100, which suppresses heat transfer in the depth direction and provides excellent thermal insulation.

[0062] The interior wall portion 2220 extends further inward than the inner circumferential wall portion 2230. As a result, the attachment 2200 has a panel support portion 2250 that supports the interior X2 surface at the lower end of the panel G. The lower end of the panel G is housed and supported between the panel support portion 2160 and the panel support portion 2250. As shown in Figure 10, a plurality of setting blocks Gc are interposed between the lower end of the panel G and the inner circumferential wall portion 2130 of the lower frame body 2100, spaced apart along the extension direction of the lower frame body 2100. The setting blocks Gc are positioned to sandwich the tapping hole 2131 from both sides in the depth direction, and are attached to the interior wall portion 2220 by engaging the engaging piece Gc1 with the tapping hole 2131 from the inner circumferential side.

[0063] The attachment 2200 is made of, for example, metal or resin. If the attachment 2200 is made of metal, it is made of, for example, aluminum, but is not limited to aluminum. Because the attachment 2200 is made of metal or resin, the processing accuracy of the attachment 2200 as a support part for the facing material can be increased compared to the case where the indoor side X2 of the facing material G is supported by a wooden facing material support part, and deterioration of the attachment 2200 over time can be suppressed. As a result, it is possible to suppress the facing material G from easily coming off the bottom frame 32, 42, 52, 62. If the attachment 2200 is made of resin, it is possible to suppress the outdoor side of the bottom frame covering material 2300 (described later) from being cooled by cold air from the outdoor side X1, thereby improving the thermal insulation performance.

[0064] The outer circumferential end of the interior wall portion 2220 has a protruding piece 2221 that is flush with the outer circumferential wall portion 2240 and protrudes toward the interior side X2. The inner circumferential end of the panel support portion 2250 has a protruding piece 2251 that is parallel to the protruding piece 2221 and protrudes toward the interior side X2.

[0065] (Lower stile covering material) The lower frame covering material 2300 is a non-metallic frame covering material that constitutes the visible surface of the interior side X2 of the lower frames 32, 42, 52, and 62, and is arranged to cover the visible surface of the interior side X2 of the attachment 2200 along the entire length in the extension direction of the lower frames 32, 42, 52, and 62. The lower frame covering material 2300 is a decorative material that improves the aesthetic appearance of the sliding window 1 when viewed from the interior side X2, and in order to ensure the uniformity of the design of the sliding window 1, the same non-metallic material as the upper frame covering material 1300 provided on the upper frames 31, 41, 51, and 61 is used. In this embodiment, the same wood as the upper frame covering material 1300 is used for the lower frame covering material 2300.

[0066] As shown in Figure 11, the lower frame covering material 2300 is attached to the indoor wall portion 2220 of the attachment 2200 by interposing multiple double-sided adhesive tapes 2400, 2400 between it and the indoor wall portion 2220. Notches 2310, 2320 are formed at the inner and outer ends of the lower frame covering material 2300, respectively, and are cut out in a stepped manner so as to open toward the outdoor side X1, extending along the entire length of the lower frame covering material 2300 in the extending direction. The notches 2310, 2320 engage with a pair of upper and lower protruding pieces 2251, 2221 of the attachment 2200 from the indoor side X2. At this time, the protruding pieces 2251, 2221 are fitted into and housed within the notches 2310, 2320, and are covered from the indoor side X2 by the lower frame covering material 2300. Therefore, the attachment 2200 is difficult to see from the interior side X2. The lower frame covering material 2300 may be fixed to the interior wall portion 2220 of the attachment 2200 by driving screws (not shown) from the interior side X2 of the attachment 2200, in addition to using multiple double-sided adhesive tapes 2400, 2400.

[0067] A stepped portion 2222 is formed at the boundary between the interior wall portion 2220 and the panel support portion 2250. As shown in Figure 11, the visible surface 2220a on the interior side X2 of the interior wall portion 2220 is set back on the exterior side X1 than the visible surface 2250a on the interior side X2 of the panel support portion 2250, with the stepped portion 2222 as the boundary. Multiple double-sided adhesive tapes 2400, 2400 are placed on the visible surface 2220a on the interior side X2 of the interior wall portion 2220, spaced apart from each other in the vertical visible direction, and extending parallel to the extension direction of the attachment 2200.

[0068] The lower frame covering material 2300 is positioned across the interior wall portion 2220 and the surface material support portion 2250 of the attachment 2200 via multiple double-sided adhesive tapes 2400, 2400, thereby creating a gap between the attachment 2200 and the lower frame covering material 2300 that corresponds to the thickness of the double-sided adhesive tape 2400. This gap constitutes a ventilation channel. As a result, even if condensation occurs on the visible surface 2220a of the interior wall portion 2220 of the attachment 2200, drainage is possible, and it is possible to prevent the lower frame covering material 2300 from coming into contact with the condensation and getting wet, and further promote drying through ventilation. The double-sided adhesive tape 2400 may be provided along the entire length of the lower frame 32, 42, 52, 62 in the extending direction, or it may be provided in fragments at intervals in the extending direction of the lower frame 32, 42, 52, 62 in order to ensure good ventilation in the vertical direction.

[0069] When the attachment 2200 and the lower frame covering material 2300 are fixed together with screws, the member interposed between them can be any gap-forming member having a thickness that allows for the formation of a gap constituting a ventilation channel, and is not necessarily limited to the double-sided adhesive tape 2400. Examples of gap-forming members other than the double-sided adhesive tape 2400 include elastic members made of rubber, resin, etc., in the form of tape or sheet.

[0070] [Inner frame of the meeting point for the inner shoji screen] The meeting stiles 33 and 43, which are positioned on the door-end sides of the inner sash 3 and inner sash 4, respectively, which slide between the same indoor upper rail 21b and indoor lower rail 22b, are positioned to overlap on the indoor side X2 with the meeting stiles 53 and 63, which are positioned on the door-end side of the outer sash 5 and 6, when the inner sash 3 and 4 and outer sash 5 and 6 are closed, as shown in Figures 1, 2 and 6, and constitute the meeting sections 10A and 10A. The two meeting sections 10A and 10A have the same structure. Figure 6 shows the meeting joint 10A between the inner sash 3 and the outer sash 5. However, since the meeting joint 10A between the inner sash 4 and the outer sash 6 is arranged symmetrically to that in Figure 6, the illustration and explanation of the meeting joint 10A between the inner sash 4 and the outer sash 6 corresponding to Figure 6 will be omitted below, as the explanation of the meeting joint 10A between the inner sash 3 and the outer sash 5 will be used as a reference.

[0071] As shown in Figure 6, the meeting stile inner frame 33 of the inner sliding door 3 is composed of a meeting stile inner frame body 331, an attachment 332, and a meeting stile inner frame covering material 333.

[0072] (Meeting stile inner frame main body) The meeting stile interior frame body 331 is made of an extruded metal profile such as aluminum and is composed of an outdoor wall portion 3311, an indoor wall portion 3312, an outer peripheral wall portion 3313, a first inner peripheral wall portion 3314, a second inner peripheral wall portion 3315, and a partition wall portion 3316, and has a hollow structure. The indoor wall portion 3312 is formed to be thicker in the depth direction than the other wall portions of the meeting stile interior frame body 331. The partition wall portion 3316 is positioned parallel to the outdoor wall portion 3311 and the indoor wall portion 3312 on the indoor side X2 of the facing material G, and divides the internal space of the meeting stile interior frame body 331 into an outdoor side X1 and an indoor side X2. The first inner peripheral wall portion 3314 is positioned on the outdoor side X1 of the partition wall portion 3316 and is positioned opposite the facing material G. The second inner circumferential wall portion 3315 is located on the indoor side X2 of the partition wall portion 3316 and is positioned further inward than the first inner circumferential wall portion 3314.

[0073] The meeting stile inner frame body 331 has a first hollow section S33a inside the rectangular area enclosed by the outdoor wall section 3311, the indoor wall section 3312, the first inner peripheral wall section 3314, and the partition wall section 3316, and a second hollow section S33b inside the rectangular area enclosed by the indoor wall section 3312, the outer peripheral wall section 3313, the second inner peripheral wall section 3315, and the partition wall section 3316.

[0074] A recess 3311a is formed at the inner circumference end of the exterior wall portion 3311, opening toward the inner circumference. As shown in Figure 6, when the interior sash 3 and the exterior sash 5 are closed, the recess 3311a receives and engages with a projection 5613 provided at the interior X2 end of the meeting stile outer frame 53 of the exterior sash 5, thereby forming a labyrinth structure. The exterior wall portion 3311 has a surface material support portion 3317 on the interior X2 side of the recess 3311a, which extends further inward than the first interior side wall portion 3314 and supports the exterior X1 surface of the surface material G.

[0075] (attachment) Attachment 332 is a component of the meeting stile interior frame 33, 43. Attachment 332 is positioned to cover the visible and hidden surfaces of the meeting stile interior frame body 331 along its entire length in the direction of extension. The vertical length of attachment 332 is longer than the vertical length of the meeting stile interior frame body 331. Therefore, at least one of the upper or lower end of attachment 332 is positioned to extend above or below the upper or lower end of the meeting stile interior frame body 331 while covering it.

[0076] As shown in Figures 6 and 12, the attachment 332 is composed of an indoor wall portion 3321 positioned along the indoor wall portion 3312 of the meeting stile interior frame body 331, an outer periphery wall portion 3322 extending in the depth direction along the outer periphery wall portion 3313 of the meeting stile interior frame body 331, and an inner periphery wall portion 3323 extending in the depth direction along the second inner periphery wall portion 3315 of the meeting stile interior frame body 331. The outer periphery wall portion 3322 extends from the outer periphery end of the indoor wall portion 3321 toward the outdoor side X1. The inner periphery wall portion 3323 extends from the inner periphery end of the indoor wall portion 3321 toward the outdoor side X1.

[0077] A first engaging portion 3322a is provided at the outer-side X1 end of the outer peripheral wall portion 3322, projecting toward the inner peripheral side. A second engaging portion 3323a is provided near the outer-side X1 end of the inner peripheral wall portion 3323, projecting toward the outer peripheral side. As shown in Figure 13, the first engaging portion 3322a engages with an engaging projection 3313a provided at the outer-side X1 end of the outer peripheral wall portion 3313 of the meeting stile inner frame body 331. As shown in Figure 14, the second engaging portion 3323a engages with an engaging projection 3315a provided at the outer-side X1 end of the second inner peripheral wall portion 3315 of the meeting stile inner frame body 331. As a result, the attachment 332 is attached to the meeting stile interior frame body 331 so as to cover the visible surface X2 on the interior side of the meeting stile interior frame body 331, as well as the visible surfaces on the outer and inner sides.

[0078] As shown in Figure 12, the interior walls 3321, 3322, and 3323 of the attachment 332 have multiple protrusions 332a that project toward the meeting stile frame body 331. Each protrusion 332a extends along the entire length of the attachment 332 in the extending direction. When the meeting stile frame body 331 and the attachment 332 are assembled, a gap equal to the protrusion height of the protrusions 332a is formed between the meeting stile frame body 331 and the attachment 332. As a result, as shown in Figures 13 and 14, a ventilation channel Vc1 is formed between the meeting stile frame body 331 and the attachment 332, and the space between them is insulated.

[0079] A panel support portion 3324 is provided at the end of the inner circumferential side wall portion 3323 that is on the outdoor side X1 beyond the second engaging portion 3323a. As shown in Figures 12 and 14, the panel support portion 3324 is composed of a first end portion 3324a that extends outward from the inner circumferential side wall portion 3323 and a second end portion 3324b that extends inward from the inner circumferential side wall portion 3323. The first end portion 3324a is positioned in contact with or close to the first inner circumferential side wall portion 3314 of the meeting stile inner frame body 331. The end of the panel material G on the meeting stile inner frame 33 side is housed and supported between the panel support portion 3317 of the meeting stile inner frame body 331 and the panel support portion 3324 of the attachment 332.

[0080] At the outer-side X1 end of the outer peripheral wall portion 3322, an outer peripheral covering material engaging portion 3322b is provided, which is arranged flush with the first engaging portion 3322a and protrudes outward. The outer peripheral covering material engaging portion 3322b is formed in an L-shape that bends toward the indoor side X2. Near the end of the outer peripheral wall portion 3322 on the indoor side X2, specifically, at a point slightly outside X1 of the connection between the outer peripheral wall portion 3322 and the indoor wall portion 3321, a protruding piece 3322c is provided that protrudes outward. Furthermore, at the outer-side X1 end of the inner peripheral wall portion 3323, an inner peripheral covering material engaging portion 3323b is provided, which is formed by the second end portion 3324b of the surface material support portion 3324. The inner peripheral covering material engaging portion 3323b is formed in an L-shape that bends toward the indoor side. A protruding piece 3323c is provided near the end of the inner side wall portion 3320 on the indoor side X2, specifically at a point slightly on the outdoor side X1 than the connection point between the inner side wall portion 3323 and the indoor side wall portion 3321, protruding inwards.

[0081] The attachment 332 is made of, for example, metal or resin. If the attachment 332 is made of metal, it is made of, for example, aluminum, but is not limited to aluminum. Because the attachment 332 is made of metal or resin, the processing accuracy of the attachment 332 as a support part for the facing material G can be increased compared to the case where the indoor side X2 of the facing material G is supported by a wooden facing material support part, and deterioration of the attachment 332 over time can be suppressed. As a result, it is possible to suppress the facing material G from easily coming off the meeting stile inner frame 33. If the attachment 332 is made of resin, it is possible to suppress the cooling of the side of the meeting stile inner frame covering material 333 that faces the attachment 332 by cold air from the outdoor side X1, thereby improving the thermal insulation performance.

[0082] (Matched inner stile covering material) The meeting stile inner frame covering material 333 is a frame covering material that constitutes the visible and hidden surfaces of the interior side X2 of the meeting stile inner frames 33 and 43. The meeting stile inner frame covering material 333 covers the interior side X2 surface of the attachment 332 over its entire length in the extension direction so that the attachment 332 is not visible from the interior side X2. Specifically, the meeting stile inner frame covering material 333 is positioned to cover the visible and hidden surfaces of the interior side X2 of the attachment 332. The meeting stile inner frame covering material 333 is a decorative material that improves the aesthetic appearance of the sliding window 1 when viewed from the interior side X2, and in order to ensure uniformity in the design of the sliding window 1, the same non-metallic material as the upper frame covering material 1300 provided on the upper frames 31, 41, 51, and 61 described above is used. In this embodiment, the same wood as the upper frame covering material 1300 is used for the meeting stile inner frame covering material 333.

[0083] The meeting stile interior frame covering material 333 consists of three divided covering materials that are arranged along the outer surfaces of the interior wall portion 3321, the outer wall portion 3322, and the inner wall portion 3323 of the attachment 332. Specifically, the meeting stile interior frame covering material 333 is composed of two first covering materials, which are the outer covering material 3331 and the inner covering material 3332, and one second covering material, which is the interior covering material 3333.

[0084] One of the first covering materials, the outer peripheral covering material 3331, is formed in a flat plate shape and is arranged along the outer surface of the outer peripheral side wall portion 3322 of the attachment 332. The width of the outer peripheral covering material 3331 in the depth direction is approximately equal to the dimension between the outer peripheral covering material engaging portion 3222b and the protruding piece 3322c provided on the outer peripheral side wall portion 3322 of the attachment 332. As shown in Figures 12 and 13, a notch portion 3331a, which is cut out in a stepped shape and opens outwards, is formed at the outdoor side X1 end of the outer peripheral covering material 3331 along the entire length in the extension direction of the outer peripheral covering material 3331.

[0085] The inner side X2 end of the outer peripheral covering material 3331 has an opposing surface 3331b that faces the outer side X1 end of the outer peripheral portion 3333b of the inner peripheral covering material 3333, which will be described later. The opposing surface 3331b is formed along the entire length in the extending direction of the outer peripheral covering material 3331. This opposing surface 3331b is formed by an inclined surface. More specifically, as shown in Figure 12, the opposing surface 3331b is inclined diagonally in a straight line so as to taper toward the inner side X2. More specifically, the opposing surface 3331b is cut diagonally so that the outer surface 3331c facing the outer peripheral side of the outer peripheral covering material 3331 approaches the outer peripheral side wall portion 3322 of the attachment 332 as it approaches the inner side X2. The inclination angle is not particularly limited, but for example, it can be formed at an angle of 45° with respect to the outer surface 3331c of the outer peripheral covering material 3331. The tip of the indoor side X2 of the opposing surface 3331b has an indoor side end surface 3331d which is a flat surface perpendicular to the outer surface 3331c.

[0086] The outer peripheral covering material 3331 is positioned between the outer peripheral covering material engaging portion 3222b and the protruding piece 3322c by hooking the notch portion 3331a of the attachment 3322b from the indoor side X2, and by bringing the indoor side end face 3331d into contact with the protruding piece 3322c of the attachment 332. At this time, an elastic material 334 is interposed in a compressed state between the outer peripheral covering material 3331 and the attachment 332.

[0087] The elastic material 334 generates an elastic rebound force when compressed, and is formed in an L-shape having a first elastic material 3341 and a second elastic material 3342 integrally. As shown in Figure 13, the first elastic material 3341 is compressed by being sandwiched between the outdoor side end surface 3331e, which is the flat surface of the outer peripheral covering material 3331, and the outer peripheral covering material engagement portion 3322b of the attachment 332. The second elastic material 3342 is compressed by being sandwiched between the outdoor side X1 end of the inner surface 3331f facing the inner peripheral side of the outer peripheral covering material 3331, and the outdoor side X1 end of the outer peripheral side wall portion 3322 of the attachment 332.

[0088] In the elastic material 334, the first elastic material 3341, by being sandwiched between the outer peripheral covering material 3331 and the attachment 332, applies a pressing force F1 toward the indoor side X2 to the outer peripheral covering material 3331, as shown in Figure 13, and biases the indoor side end face 3331d of the outer peripheral covering material 3331 to contact the protruding piece 3322c while maintaining the engagement between the outer peripheral covering material 3331 and the outer peripheral covering material engagement portion 3322b. As a result, the outer peripheral covering material 3331 is positioned in the depth direction by the protruding piece 3322c, so that the position of the outer peripheral covering material 3331 is consistently aligned regardless of manufacturing variations in the depth dimensions of the outer peripheral covering material 3331, improving the aesthetic appearance.

[0089] Furthermore, the second elastic material 3342, by being sandwiched between the outer peripheral covering material 3331 and the attachment 332, applies a pressing force F2 toward the outer peripheral end X1 of the outer peripheral covering material 3331, as shown in Figure 13, due to the elastic repulsive force generated, thereby biasing the outer peripheral end X1 of the outer peripheral covering material 3331 toward the outer peripheral covering material engagement portion 3322b. As a result, the outer peripheral covering material 3331 is held and temporarily fixed between the outer peripheral covering material engagement portion 3322b of the attachment 3322b and the protruding piece 3322c, with the outer peripheral covering material 3331 positioned in the depth direction by the protruding piece 3322c.

[0090] The other first covering material, the inner circumferential covering material 3332, is formed in a flat plate shape, similar to the outer circumferential covering material 3331, and is arranged along the outer surface of the inner circumferential side wall portion 3323 of the attachment 332. The width of the inner circumferential covering material 3332 in the depth direction is smaller than the width of the outer circumferential covering material 3331 in the depth direction, and is approximately equal to the dimension between the inner circumferential covering material engagement portion 3323b and the protruding piece 3323c of the inner circumferential side wall portion 3323. At the end of the inner circumferential covering material 3332 on the outdoor side X1, a notch portion 3332a is formed along the entire length of the inner circumferential covering material 3332, which is cut out in a stepped shape so as to open toward the inner circumferential side.

[0091] The inner circumferential covering material 3332 has an opposing surface 3332b that faces the outer surface X1 end of the inner circumferential portion 3333c of the indoor covering material 3333, which will be described later. The opposing surface 3332b is formed along the entire length of the inner circumferential covering material 3332 in the extending direction. This opposing surface 3332b is formed by an inclined surface. More specifically, as shown in Figure 12, the opposing surface 3332b is inclined diagonally in a straight line so as to taper toward the indoor side X2. More specifically, the opposing surface 3332b is cut diagonally so that the outer surface 3332c facing the inner circumferential side of the inner circumferential covering material 3332 approaches the inner circumferential side wall portion 3323 of the attachment 332 as it approaches the indoor side X2. The inclination angle is not particularly limited, but for example, it can be formed at an angle of 45° with respect to the outer surface 3332c of the inner circumferential covering material 3332. The tip of the indoor side X2 of the opposing surface 3332b has an indoor side end surface 3332d which is a flat surface perpendicular to the outer surface 3332c.

[0092] The inner circumferential covering material 3332 is positioned between the inner circumferential covering material engaging portion 3323b and the protruding piece 3323c by engaging the notch portion 3332a with the inner circumferential covering material engaging portion 3323b of the attachment 332 from the indoor side X2, and by bringing the indoor side end face 3332d into contact with the protruding piece 3323c of the attachment 332. At this time, an elastic material 335 having the same configuration as the elastic material 334 described above is interposed between the inner circumferential covering material 3332 and the attachment 332.

[0093] As shown in Figures 12 and 14, the first elastic material 3351 of the elastic material 335 is positioned to be sandwiched between the outdoor-side end surface 3332e, which is the flat surface of the inner-side covering material 3332, and the inner-side covering material engagement portion 3323b of the attachment 332. The second elastic material 3352 is positioned to be sandwiched between the outdoor-side X1 end of the inner surface 3332f of the inner-side covering material 3332 that faces the outer periphery, and the outdoor-side X1 end of the inner-side wall portion 3323 of the attachment 332.

[0094] In the elastic material 335, the first elastic material 3351, by being sandwiched between the inner circumferential covering material 3332 and the attachment 332, applies a pressing force F1 toward the indoor side X2 to the inner circumferential covering material 3332, as shown in Figure 14, and biases the indoor side end face 3332d of the inner circumferential covering material 3332 to contact the protruding piece 3323c while maintaining the engagement between the inner circumferential covering material 3332 and the inner circumferential covering material engagement portion 3323b. As a result, the inner circumferential covering material 3332 is positioned in the depth direction by the protruding piece 3323c, so that the position of the inner circumferential covering material 3332 is consistently aligned regardless of manufacturing variations in the depth dimensions of the inner circumferential covering material 3332, improving the aesthetic appearance.

[0095] Furthermore, the second elastic material 3352, due to the elastic repulsive force generated by being sandwiched between the outer peripheral covering material 3331 and the attachment 332, applies a pressing force F3 toward the inner peripheral side to the outer peripheral side X1 end of the inner peripheral covering material 3332, as shown in Figure 14, biasing the outer peripheral side X1 end of the inner peripheral covering material 3332 in a direction that engages with the inner peripheral covering material engagement portion 3323b. As a result, the inner peripheral covering material 3332 is held and temporarily fixed between the inner peripheral covering material engagement portion 3323b of the attachment 3322 and the protruding piece 3323c, with the inner peripheral covering material 3332 positioned in the depth direction by the protruding piece 3323c.

[0096] By interposing elastic materials 334 and 335 between the outer peripheral covering material 3331 and the inner peripheral covering material 3332 and the attachment 332, direct contact between the outer peripheral covering material 3331 and the inner peripheral covering material 3332 and the attachment 332 at the ends of the outdoor side X1 is avoided. As a result, impact noises, etc., when the inner sashes 3 and 4 are opened and closed or when pressure is applied to the entire inner sashes 3 and 4 are also reduced.

[0097] The elastic materials 334 and 335 are not particularly limited as long as they generate elastic rebound force when compressed, but for example, a sealing material made of ethylene propylene diene rubber (EPDM) foam can be used. In this embodiment, the elastic materials 334 and 335 are formed integrally in an L shape with the first elastic material 3341 and 3351 and the second elastic material 3342 and 3352, but the elastic materials 334 and 335 may consist of two separate members, the first elastic material 3341 and 3351 and the second elastic material 3342 and 3352. The elastic materials 334 and 335 may be formed in elongated lengths and arranged along the entire length in the extension direction of the attachment 332, or they may be formed in short lengths and arranged in fragments at intervals along the extension direction of the attachment 332.

[0098] As shown in Figures 12 to 14, the outer peripheral side wall portion 3322 and the inner peripheral side wall portion 3323 of the attachment 332 have a plurality of protrusions 332b that project toward the outer peripheral covering material 3331 and the inner peripheral covering material 3332, respectively. Each protrusion 332b extends along the entire length in the extension direction of the attachment 332. Therefore, when the outer peripheral covering material 3331 and the inner peripheral covering material 3332 are held along the outer peripheral side wall portion 3322 and the inner peripheral side wall portion 3323 of the attachment 332, a gap equal to the protrusion height of the protrusions 332b is formed between the outer peripheral covering material 3331 and the inner peripheral covering material 3332 and the attachment 332. As a result, as shown in Figures 13 and 14, a ventilation channel Vc2 is formed between the outer peripheral covering material 3331 and the inner peripheral covering material 3332 and the attachment 332.

[0099] The second covering material, the indoor covering material 3333, is integrally composed of an indoor portion 3333a, an outer peripheral portion 3333b extending from the outer peripheral end of the indoor portion 3333a toward the outdoor side X1, and an inner peripheral portion 3333c extending from the inner peripheral end of the indoor portion 3333a toward the outdoor side X1.

[0100] The interior portion 3333a is positioned along the outer surface of the interior wall portion 3321 of the attachment 332. The outer surface of the interior portion 3333a facing the interior X2 is a flat surface over its entire length and constitutes the visible surface of the interior X2 of the meeting stile interior frame 33.

[0101] The outer peripheral portion 3333b has a thickness approximately the same as that of the outer peripheral covering material 3331. The outer peripheral portion 3333b on the outdoor side X1 has an opposing surface 3333d that is positioned opposite to the opposing surface 3331b of the outer peripheral covering material 3331. The opposing surface 3333d is formed along the entire length in the extension direction of the indoor covering material 3333. This opposing surface 3333d is formed by an inclined surface that is inclined parallel to the opposing surface 3331b of the outer peripheral covering material 3331 at the same angle as the inclination. Specifically, as shown in Figures 12 and 13, the opposing surface 3333d is formed by the inner surface of the outer peripheral portion 3333b facing the attachment 332 being inclined linearly so as it approaches the outdoor side X1, moving away from the outer peripheral wall portion 3322 of the attachment 332. The opposing surface 3333d is inclined to cover the opposing surface 3331b of the outer peripheral covering material 3331 from the outer surface 3331c side of the outer peripheral covering material 3331. The opposing surface 3331b of the outer peripheral covering material 3331 is inclined to slide under the opposing surface 3333d from the outer peripheral wall portion 3322 side of the attachment 332. The tip of the outdoor side X1 of the opposing surface 3333d has a notch 3333e that is cut out diagonally in a direction substantially perpendicular to the inclination direction of the opposing surface 3333d.

[0102] The inner circumferential portion 3333c has a thickness approximately the same as that of the inner circumferential covering material 3312. The outer end of the inner circumferential portion 3333c on the outdoor side X1 has an opposing surface 3333f that is positioned opposite to the opposing surface 3332b of the inner circumferential covering material 3332. The opposing surface 3333f is formed along the entire length in the extension direction of the indoor covering material 3333. This opposing surface 3333f is formed by an inclined surface that is inclined parallel to the opposing surface 3332b of the inner circumferential covering material 3332 at the same angle as the inclination. Specifically, as shown in Figures 12 and 14, the opposing surface 3333f is formed by the inner surface of the inner circumferential portion 3333c facing the attachment 332 being inclined linearly so as it approaches the outdoor side X1, moving away from the inner circumferential wall portion 3323 of the attachment 332. The opposing surface 3333f is inclined to cover the opposing surface 3332b of the inner circumferential covering material 3332 from the outer surface 3332c side of the inner circumferential covering material 3332. The opposing surface 3332b of the inner circumferential covering material 3332 is inclined to slide under the inner circumferential wall portion 3323 side of the attachment 332 with respect to this opposing surface 3333f. The tip of the outdoor side X1 of the opposing surface 3333f has a notch 3333g that is cut out obliquely in a direction substantially perpendicular to the inclination direction of the opposing surface 3333f.

[0103] The indoor covering material 3333 is attached to the attachment 332 from the indoor side X2 with multiple double-sided adhesive tapes 336, 336 interposed between them. More specifically, the indoor covering material 3333 is attached so as to sandwich the indoor wall portion 3321 of the attachment 332 between the outer peripheral portion 3333b and the inner peripheral portion 3333c, with multiple double-sided adhesive tapes 336, 336 interposed between the indoor portion 3333a and the indoor wall portion 3321 of the attachment 332.

[0104] The outer peripheral portion 3333b is positioned to face the outer peripheral wall portion 3322 on the indoor side X2, rather than the protruding piece 3322c of the attachment 332. The inner peripheral portion 3333c is positioned to face the inner peripheral wall portion 3323 on the indoor side X2, rather than the protruding piece 3323c of the attachment 332. The opposing surfaces 3333d and 3333f of the outer peripheral portion 3333b and the inner peripheral portion 3333c are positioned in contact with the opposing surfaces 3331b and 3332b of the outer peripheral covering material 3331 and the inner peripheral covering material 3332.

[0105] At this time, the outer peripheral portion 3333b and inner peripheral portion 3333c of the indoor covering material 3333 are positioned on the outdoor side X1 beyond the positions of the protruding pieces 3322c and 3323b of the attachment 332, as shown in Figures 13 and 14. The opposing surfaces 3333d and 3333f of the outer peripheral portion 3333b and inner peripheral portion 3333c are positioned to cover the protruding pieces 3322c and 3323b. The opposing surface 3331b of the outer peripheral covering material 3331 is inserted and held between the opposing surface 3333d of the outer peripheral portion 3333b and the outer peripheral side wall portion 3322 of the attachment 332. The opposing surface 3332b of the inner circumferential covering material 3332 is inserted and held between the opposing surface 3333f of the inner circumferential portion 3333c and the inner circumferential wall portion 3323 of the attachment 332. In this state, the indoor covering material 3333 is fixed to the attachment 332 by screws 337 that are driven from the outdoor side X1 through the indoor wall portion 3321 of the attachment 332 and into the indoor portion 3333a of the indoor covering material 3333. The screws 337 are driven into the upper and lower ends of the attachment 332 that protrude above and below the meeting stile inner frame body 331. As the indoor covering material 3333 is fixed to the attachment 332, the outer circumferential covering material 3331 and the inner circumferential covering material 3332 are also fixed to the attachment 332.

[0106] Multiple double-sided adhesive tapes 336, 336 extend along the extension direction of the meeting stile inner frame 33 and are spaced apart from each other in the left-right direction. As a result, a gap equivalent to the thickness of the double-sided adhesive tape 336 is formed between the indoor covering material 3333 and the indoor wall portion 3321 of the attachment 332. This gap constitutes a ventilation channel. This allows for drainage even if condensation occurs on the indoor covering material 3333, prevents the indoor covering material 3333 from coming into contact with the condensation and getting wet, and also promotes drying through ventilation. The double-sided adhesive tape 336 may be formed in long lengths and arranged along the entire length in the extension direction of the meeting stile inner frame 33, or, to improve ventilation, may be formed in short lengths and arranged in fragments at intervals along the extension direction of the meeting stile inner frame 33.

[0107] When the attachment 332 and the indoor covering material 3333 are fixed together with screws, the member interposed between them can be any gap-forming member having a thickness that allows for the formation of a gap constituting a ventilation channel, and is not necessarily limited to the double-sided adhesive tape 336. Examples of gap-forming members other than the double-sided adhesive tape 336 include elastic members made of rubber, resin, etc., in the form of tape or sheet.

[0108] As shown in Figures 12 to 14, projections 332c, 332c are formed on both the left and right ends of the indoor wall portion 3321 of the attachment 332, projecting toward the outer and inner circumferences, respectively. This ensures that when attaching the indoor covering material 3333 to the attachment 332, even if the position of the indoor covering material 3333 is shifted to the left or right relative to the attachment 332, it will still come into contact with the projections 332c. This prevents surface contact between the outer circumference portion 3333b or inner circumference portion 3333c of the indoor covering material 3333 and the outer circumference side wall portion 3322 or inner circumference side wall portion 3323 of the attachment 332, thus ensuring an airflow path between them.

[0109] In this way, the indoor covering material 3333 is fixed to the attachment 332, and the outer covering material 3331 and the inner covering material 3332, which are held on the opposing surfaces 3333d and 3333f of the outer and inner circumferential parts 3333b and 3333c of the indoor covering material 3333, are fixed between the opposing surfaces 3333d and 3333f and the outer covering material engaging portion 3322b and the inner covering material engaging portion 3323b of the attachment 332. The meeting stile inner frame covering material 333 is composed of three parts: an outer periphery covering material 3331, an inner periphery covering material 3332, and an indoor covering material 3333. However, the fixing of the meeting stile inner frame covering material 3333 is done simply by fixing the indoor covering material 3333 to the attachment 332 with screws 337, which simultaneously holds and fixes the indoor X2 ends of the outer periphery covering material 3331 and the inner periphery covering material 3332. Therefore, it is not always necessary to fix the outer periphery covering material 3331 and the inner periphery covering material 3332 to the attachment 332 using screws, double-sided adhesive tape, etc. As a result, even if the covering material is divided into multiple parts, it can be easily installed with a small number of parts.

[0110] Since the opposing surfaces 3333d, 3333f of the outer peripheral portion 3333b and the inner peripheral portion 3333c of the indoor covering material 3333, and the opposing surfaces 3331b, 3332b of the outer peripheral covering material 3331 and the inner peripheral covering material 3332 are all formed by inclined surfaces, there is no need to perform complex processing to combine and engage them with each other, and there is no risk of them becoming unable to butt together due to misalignment of surfaces caused by manufacturing errors, etc. Because the opposing surfaces 3331b, 3332b and the opposing surfaces 3333d, 3333f are obliquely opposed by inclined surfaces, even if a small gap occurs between the opposing surfaces 3331b, 3332b and the opposing surfaces 3333d, 3333f due to dimensional misalignment caused by shrinkage of the outer peripheral covering material 3331 and the inner peripheral covering material 3332, there is no risk of the internal attachment 332 being visible through the gap between them.

[0111] As shown in Figures 13 and 14, notches 3333e and 3333g are provided at the tip of the opposing surface 3333d of the outer peripheral portion 3333b and the tip of the opposing surface 3333f of the inner peripheral portion 3333c, respectively. As a result, V-shaped grooves 3334 and 3334 are formed between the opposing surfaces 3333d and 3333f of the outer peripheral portion 3333b and the inner peripheral portion 3333c and the opposing surfaces 3331b and 3332b of the outer peripheral portion 3331 and the inner peripheral portion 3332. Since the opposing surfaces 3333d and 3333f of the outer peripheral side portion 3333b and the inner peripheral side portion 3333c do not have sharp edges, it is possible to prevent damage to the edges of the opposing surfaces 3333d and 3333f when they collide with something during installation of the interior covering material 3333 or when setting up the interior sashes 3 and 4, or due to deterioration from long-term use. As a result, the good aesthetic appearance of the meeting stile interior frame covering material 333 can be maintained for a long period of time.

[0112] Furthermore, because grooves 3334, 3334 are formed between opposing surfaces 3333d, 3333f and opposing surfaces 3331b, 3332b, even if some gaps occur after combining the outer peripheral covering material 3331 and the inner peripheral covering material 3332 with the indoor covering material 3333, only the opposing surfaces 3333d, 3333f, 3331b, 3332b are visible, and the gaps themselves are not very noticeable, thus minimizing any decrease in aesthetic appeal. Moreover, since the grooves 3334, 3334 are positioned on the left and right visible surfaces of the meeting stile inner frame 33, they are not noticeable even when viewing the meeting stile inner frame 33 from the front on the indoor side X2.

[0113] [The butt joint frame of one of the interior shoji screens] The butt joints 34 and 44, which are positioned on the door edge sides of the inner sash 3 and inner sash 4, respectively, which slide between the same indoor upper rail 21b and indoor lower rail 22b, abut each other when the inner sashes 3 and 4 are closed, as shown in Figures 1, 2 and 7, and form a butt joint 10B in the center of the sliding window 1 in the left-right direction.

[0114] As shown in Figure 7, the butt joint stile 34 of the inner shoji screen 3 is positioned to protrude outwards X1 and engulf the butt joint stile 44 of the inner shoji screen 4, and the butt joint stile 44 of the inner shoji screen 4 is positioned to protrude outwards X2 and engulf the butt joint stile 34 of the inner shoji screen 3. Therefore, the butt joint section 10B is formed in a narrow shape so that only the butt joint stile 34 of the inner shoji screen 3 or the butt joint stile 44 of the inner shoji screen 4 is visible. The width of the butt joint stiles 34 and 44 is approximately the same as the width of the meeting inner stiles 33 and 43 of the inner shoji screens 3 and 4 and the meeting outer stiles 53 and 63 of the outer shoji screens 5 and 6 that constitute the meeting joint sections 10A and 10A, as shown in Figures 1 and 2. Therefore, the sliding window 1 has excellent overall design uniformity when viewed from the exterior side X1 and the interior side X2, and possesses good design quality.

[0115] As shown in Figure 7, the butt joint frame 34 of the inner sliding door 3 is composed of a butt joint frame body 341, a frame covering portion 342, and a resin cover 343. The butt joint frame body 341 and the frame covering portion 342 are made of extruded profiles integrally molded from a metal material such as aluminum.

[0116] The butt joint frame body 341 is positioned opposite to the end of the facing material G of the inner sash 3 on the butt joint portion 10B side, and is formed in a flat plate shape that extends along the entire length in the extending direction of the butt joint frame 34. A facing material support portion 3411 is integrally provided at the outdoor side X1 end of the butt joint frame body 341, protruding inward to support the outdoor side X1 surface of the facing material G. The indoor side X2 end 3412 of the butt joint frame body 341 protrudes X2 further inward than the indoor side X2 surface of the facing material G.

[0117] A plate-shaped projection 3413 is provided approximately in the center of the butt joint frame body 341 in the depth direction, projecting outward toward the inner sliding door 4. The projection 3413 extends along the entire length of the butt joint frame body 341 in the extension direction.

[0118] The frame covering portion 342 protrudes from the butt frame body 341 toward the outdoor side X1. The frame covering portion 342 is composed of an inner circumferential side wall portion 3421, an outdoor side wall portion 3422, an outer circumferential side wall portion 3423, and an indoor side wall portion 3424, and has a hollow structure. The inner circumferential side wall portion 3421 extends from the inner end of the panel support portion 3411 toward the outdoor side X1. The outdoor side wall portion 3422 extends from the outdoor side X1 end of the inner circumferential side wall portion 3421 toward the outer circumferential side. The outer circumferential side wall portion 3423 extends in a curve toward the indoor side X2 and toward the inner circumferential side from a point slightly inward from the outer end 3422a of the outdoor side wall portion 3422. The interior wall portion 3424 connects the interior end X2 of the exterior wall portion 3423 to the exterior end X1 of the butt joint frame body 341. The frame covering portion 342 has a hollow portion S34 on the inside, surrounded by the interior wall portion 3421, the exterior wall portion 3422, the exterior wall portion 3423, and the interior wall portion 3424.

[0119] As shown in Figure 7, the outer peripheral end 3422a of the exterior wall portion 3422 is formed to bend in an L-shape toward the interior X2, and extends to a position that covers the spacer Gb of the facing material G in the inner sash 4, which is closed by being abutted against the inner sash 3, from the exterior X1. As a result, the frame covering portion 342 of the abutting frame 34 covers the abutting frame 44 of the inner sash 4, which is closed by being abutted against the inner sash 3, from the exterior X1. This improves the aesthetic appearance of the sliding window 1 when viewed from the exterior X1. The outer peripheral wall portion 3423 bends and extends inward towards the interior X2 from a point slightly inward from the outer peripheral end 3422a of the exterior wall portion 3422, thereby forming a hand insertion space 340 between the outer peripheral surface X1 of the butt joint frame 44 of the interior sash 4 and the exterior surface X1, allowing the interior sash 4 to be opened and closed from the exterior X1.

[0120] The resin cover 343 is attached to the end 3412 on the indoor side X2 of the butt joint frame body 341, along the entire length of the butt joint frame 34 in the extending direction. The resin cover 343 is integrally composed of a cover body portion 3431, an engaging portion 3432, and a surface material support portion 3433. The cover body portion 3431 constitutes the visible surface on the indoor side X2 of the butt joint frame 34, and extends inward from the end 3412 on the indoor side X2 of the butt joint frame body 341. The engaging portion 3432 is positioned at the outer end of the cover body portion 3431. The resin cover 343 is attached to the butt joint frame body 341 by the engagement of the engaging portion 3432 with the end 3412 on the indoor side X2 of the butt joint frame body 341. The panel support portion 3433 extends from the inner circumference end of the cover body portion 3431 toward the outdoor side X1. The end of the panel G on the butt joint frame 34 side is housed and supported between the panel support portion 3411 of the butt joint frame body 341 and the panel support portion 3433 of the resin cover 343.

[0121] [The butt joint of the other inner shoji screen] As shown in Figure 7, the butt joint frame 44 of the interior sliding door 4 is composed of a butt joint frame body 441 made of an extruded metal profile such as aluminum, and a frame covering portion 442 positioned on the interior side X2 of the butt joint frame body 441. The butt joint frame body 441 and the frame covering portion 442 are connected by a pair of bridge members 443, 443 having heat insulating properties such as resin.

[0122] (Butt joint frame body) The butt joint frame body 441 is positioned opposite to the end of the facing material G of the inner sash 4 on the butt joint portion 10B side, and is formed as a flat plate extending along the entire length in the extension direction of the butt joint frame 44. A facing material support portion 4411 is integrally provided at the outdoor side X1 end of the butt joint frame body 441, protruding inward to support the outdoor side X1 surface of the facing material G. The inner side end of the facing material support portion 4411 is bent in an L shape toward the outdoor side X1. This forms a handle portion 4411a on the visible surface of the outdoor side X1 of the butt joint frame 44. The handle portion 4411a is provided in an elongated shape along the extension direction of the butt joint frame 44.

[0123] Furthermore, an outdoor extension portion 4412 is integrally provided at the outdoor side X1 end of the butt joint frame body 441, projecting toward the outer circumference opposite to the surface material support portion 4411. As shown in Figure 7, when the inner sashes 3 and 4 are butted together, the outdoor extension portion 4412 is positioned approximately parallel to the indoor side X2 of the indoor side wall portion 3424 of the frame covering portion 342 of the butt joint frame 34 of the inner sash 3, facing the indoor side wall portion 3424. A fin member 4412a is attached to the outer circumference end of the outdoor extension portion 4412. The fin member 4412a is provided in an elongated shape along the extension direction of the butt joint frame 44. The fin member 4412a projects from the outdoor extension portion 4412 toward the indoor side X2. The fin member 4412a contacts the protruding portion 3413 of the inner sash 3 from the outside X1 when the inner sashes 3 and 4 are brought together, maintaining an airtight seal between the inner sash 3 and the abutting frame 34.

[0124] An indoor extension portion 4413 is provided at the indoor side X2 end of the butt joint frame body 441, projecting toward the outer periphery of the inner sash 4 with the same projection height as the outdoor extension portion 4412. A pair of bridge portions 443, 443 are attached to the indoor extension portion 4413, which connect to the frame covering portion 442.

[0125] The butt joint frame body 441 has a pull-in member 4414 between the exterior extension 4412 and the interior extension 4413. When the interior sashes 3 and 4 are butted together, the pull-in member 4414 engages with the protruding portion 3413 of the butt joint frame 34 of the interior sash 3 by clamping it from both the interior and exterior directions.

[0126] (Stile covering part) The frame covering portion 442 protrudes from the butt frame body 441 toward the interior side X2 via a pair of bridge portions 443, 443. When the inner sashes 3 and 4 are butted together, the frame covering portion 442 is positioned to cover the area from the interior side X2, extending from the spacer Gb of the facing material G in the inner sash 3 to the spacer Gb of the facing material G in the outer sash 4.

[0127] As shown in Figure 7, the frame covering portion 442 is composed of a frame covering portion body 444, an attachment 445, and a butt-joint frame covering material 446.

[0128] The frame covering body 444 is made of an extruded metal profile such as aluminum and is composed of an outdoor wall portion 4441, an outer peripheral wall portion 4442, an indoor wall portion 4443, an inner peripheral wall portion 4444, and an outer peripheral extension portion 4445, and has a hollow structure. The frame covering body 444 has a hollow portion S44 inside, surrounded by the outdoor wall portion 4441, the outer peripheral wall portion 4442, the indoor wall portion 4443, and the inner peripheral wall portion 4444.

[0129] The exterior wall portion 4441 is positioned parallel to the interior extension portion 4413 of the butt joint frame body 441, and a pair of bridge portions 443, 443 that connect to the butt joint frame body 441 are attached to it. The outer peripheral wall portion 4442 extends from the outer peripheral end of the exterior wall portion 4441 toward the interior X2. The interior wall portion 4443 extends parallel to the exterior wall portion 4441 toward the interior from the interior X2 end of the outer peripheral wall portion 4442. The interior peripheral wall portion 4444 extends parallel to the outer peripheral wall portion 4442 toward the exterior X1 from the interior end of the interior wall portion 4443. The outer peripheral extension portion 4445 extends toward the exterior from near the interior X2 end of the outer peripheral wall portion 4442. The outer peripheral extension portion 4445 is positioned so as to completely cover the resin cover 343 on the butt joint frame 34 of the inner sliding door 3 from the interior side X2 when the inner sliding doors 3 and 4 are butted together.

[0130] An elastic member 4446 is attached to the outdoor-facing X1 surface of the outer peripheral extension 4445. The elastic member 4446 has a hard resin base 4446a that engages with and is attached to the outer peripheral extension 4445, and a soft resin or rubber elastic member body 4443b that is integrally formed with the base 4446a and protrudes toward the outdoor-facing X1, and has a hollow structure with a hollow portion 4446c formed on the inside. Multiple protruding pieces 4446d are integrally formed on the elastic member body 4443b that protrude toward the outdoor-facing X1. As shown in Figure 7, when the inner sashes 3 and 4 are abutted together, the elastic member 4446d contacts the resin cover 343 on the abutting frame 34 of the inner sash 3 by the protruding pieces 4446d, maintaining an airtight seal between the inner sash 3 and the abutting frame 34. Since the elastic member 4446 is positioned to substantially fill the space between the resin cover 343 of the butt joint frame 34 of the inner sash 3 and the outer peripheral extension 4445 of the inner sash 4, thermal insulation is also ensured in the space, in conjunction with the fact that the elastic member 4446 has a hollow portion 4446c.

[0131] (attachment) The attachment 445 is a component of the butt joint frame 44. The attachment 445 is positioned to cover the visible and hidden surfaces of the butt joint frame body 444 along its entire length in the direction of extension. The vertical length of the attachment 445 is longer than the vertical length of the butt joint frame body 444. Therefore, at least one of the upper or lower end of the attachment 445 is positioned to extend above or below the upper or lower end of the butt joint frame body 444 while covering the butt joint frame body 444.

[0132] As shown in Figures 7 and 15, the attachment 445 is configured to have an indoor wall portion 4451 positioned along the indoor wall portion 4443 and the outer peripheral extension portion 4445 of the butt joint frame body 444, and an inner peripheral wall portion 4452 extending in the depth direction along the inner peripheral wall portion 4444 of the butt joint frame body 444. The inner peripheral wall portion 4452 extends from the inner peripheral end of the indoor wall portion 4451 toward the outdoor side X1.

[0133] As shown in Figures 7 and 15, the outer peripheral end of the indoor wall portion 4451 has an outer peripheral end portion 4451a that is bent in an L-shape toward the outdoor side X1. The outer peripheral end portion 4451a is provided with a first engaging portion 4451b that protrudes toward the inner peripheral side from the middle of the protruding height direction toward the outdoor side X1. As shown in Figures 7, 15 and 16, a second engaging portion 4452a that protrudes toward the outer peripheral side is provided near the end of the inner peripheral side wall portion 4452 toward the outdoor side X1. The first engaging portion 4451b engages with an engaging piece 4445a that protrudes toward the indoor side X2 from the outer peripheral end of the outer peripheral extension portion 4445 of the butt joint frame body 444. The second engaging portion 4452a engages with an engaging projection 4444a provided at the end of the inner peripheral side wall portion 4444 toward the outdoor side X1 of the butt joint frame body 444. As a result, the attachment 445 is attached to the butt joint frame body 444 so as to cover the visible surface X2 on the interior side of the butt joint frame body 444 and the inner perimeter surface.

[0134] As shown in Figures 7 and 15, the outdoor side wall portion 4451 of the attachment 445 is provided with a projection 4451c that protrudes toward the outdoor side X1. When the attachment 445 is attached to the butt joint frame body 444, the projection 4451c is positioned along the outer surface of the outer periphery side wall portion 4442 on the indoor side X2 of the outer peripheral extension portion 4445 of the butt joint frame body 444.

[0135] As shown in Figures 15 and 16, a projection 445a is formed on the inner surface of the indoor wall portion 4451 of the attachment 445, projecting toward the butt joint frame body 444. The projection 445a extends along the entire length of the attachment 445 in the extending direction. When the butt joint frame body 444 and the attachment 445 are assembled, a gap equal to the projection height of the projection 445a is formed between the butt joint frame body 444 and the attachment 445. This creates a ventilation channel Vc3 between the butt joint frame body 444 and the attachment 445, and also provides insulation between them. Furthermore, as shown in Figure 16, the projection 445a is positioned to fit into a recess 4443a formed on the visible surface of the indoor side X2 of the indoor wall portion 4443 of the butt joint frame body 444.

[0136] The interior wall portion 4451 of the attachment 445 is positioned in the left-right direction by the protruding portion 4451c and the projection portion 445a. This prevents the interior wall portion 4451 of the attachment 445 from shifting position when the interior sash 4 is operated in the opening direction by gripping the butt joint frame 44.

[0137] A panel support portion 4453 is provided at the end of the inner circumferential side wall portion 4452 that is on the outdoor side X1 beyond the second engaging portion 4452a. As shown in Figure 15, the panel support portion 4453 is composed of a first end portion 4453a that extends outward from the inner circumferential side wall portion 4452 and a second end portion 4453b that extends inward from the inner circumferential side wall portion 4453. The first end portion 4453a is positioned in contact with or close to the bridge portion 443. The end of the panel material G on the butt joint frame 44 side is housed and supported between the panel support portion 4411 of the butt joint frame body 444 and the panel support portion 4453 of the attachment 445.

[0138] As shown in Figure 15, an inner circumferential covering material engagement portion 4452b is provided at the outdoor-side X1 end of the inner circumferential side wall portion 4452, which is formed by the second end portion 4453b of the surface material support portion 4453. The inner circumferential covering material engagement portion 4452b is formed in an L shape that bends toward the indoor side. Near the indoor-side X2 end of the inner circumferential side wall portion 4452, specifically, a portion X1 slightly further outward from the connection between the inner circumferential side wall portion 4452 and the indoor-side wall portion 4451, a protruding piece 4452c is provided that protrudes toward the inner circumferential side.

[0139] The attachment 445 is made of metal or resin, for example. If the attachment 445 is made of metal, it is made of aluminum, for example, but is not limited to aluminum. Because the attachment 332 is made of metal or resin, the processing accuracy of the attachment 445 as a support for the facing material can be increased compared to the case where the indoor side X2 of the facing material G is supported by a wooden facing material support, and deterioration of the attachment 445 over time can be suppressed. As a result, it is possible to suppress the facing material G from easily coming loose from the butt joint frame 44. If the attachment 445 is made of resin, it is possible to suppress the cooling of the side of the butt joint frame covering material 446 facing the attachment 445 by cold air from the outdoor side X1, thereby improving the thermal insulation performance.

[0140] (Butt joint frame covering material) The butt joint frame covering material 446 is a frame covering material that constitutes the visible and hidden surfaces X2 on the interior side of the butt joint frame 44. The butt joint frame covering material 446 covers the interior side X2 surface of the attachment 445 over its entire length in the extension direction so that the attachment 445 is not visible from the interior side X2. Specifically, the butt joint frame covering material 446 is positioned to cover the visible and hidden surfaces X2 on the interior side of the attachment 445. The butt joint frame covering material 446 is a decorative material that improves the aesthetic appearance of the sliding window 1 when viewed from the interior side X2, and in order to ensure uniformity in the design of the sliding window 1, the same non-metallic material as the upper frame covering material 1300 provided on the upper frames 31, 41, 51, and 61 described above is used. In this embodiment, the same wood as the upper frame covering material 1300 is used for the butt joint frame covering material 446.

[0141] The butt joint frame covering material 446 consists of two divided covering materials, which are positioned along the outer surfaces of the interior wall portion 4451 and the inner periphery wall portion 4452 of the attachment 445. Specifically, the butt joint frame covering material 446 is composed of a first covering material, which is the inner periphery covering material 4461, and a second covering material, which is the interior covering material 4462.

[0142] The first covering material, the inner circumferential covering material 4461, is formed in a flat plate shape and is arranged along the outer surface of the inner circumferential side wall portion 4452 of the attachment 445. The width of the inner circumferential covering material 4461 in the depth direction is approximately equal to the dimension between the inner circumferential covering material engaging portion 4452b and the protruding piece 4452c provided on the inner circumferential side wall portion 4452 of the attachment 445. As shown in Figures 15 and 16, a notch portion 4461a, which is cut out in a stepped manner so as to open toward the inner circumferential side, is formed at the outdoor side X1 end of the inner circumferential covering material 4461, extending along the entire length of the inner circumferential covering material 4461 in the extension direction.

[0143] As shown in Figures 15 and 16, the inner circumferential covering material 4461 has an opposing surface 4461b at the indoor side X2 end that faces the outdoor side X1 end of the inner circumferential side portion 4462b of the indoor side covering material 4462, which will be described later. The opposing surface 4461b is formed along the entire length in the extension direction of the inner circumferential covering material 4461. This opposing surface 4461b is formed by an inclined surface. More specifically, the opposing surface 4461b is inclined diagonally in a straight line so as to taper toward the indoor side X2. More specifically, the opposing surface 4461b is notched diagonally so that the outer surface 4461c facing the outer circumferential side of the inner circumferential covering material 4461 approaches the inner circumferential side wall portion 4452 of the attachment 445 as it approaches the indoor side X2. The inclination angle is not particularly limited, but for example, it can be formed at an angle of 45° with respect to the outer surface 4461c of the inner circumferential covering material 4461. The tip of the indoor side X2 of the opposing surface 4461b has an indoor side end surface 4461d which is a flat surface perpendicular to the outer surface 4461c.

[0144] The inner circumferential covering material 4461 is positioned between the inner circumferential covering material engaging portion 4452b and the protruding piece 4452c by hooking the notch portion 4461a of the attachment 445 from the indoor side X2 and bringing the indoor side end face 4461d into contact with the protruding piece 4452c of the attachment 445. At this time, an elastic material 447 is interposed in a compressed state between the inner circumferential covering material 4461 and the attachment 445.

[0145] The elastic material 447 is the same as the elastic materials 334 and 335 provided on the meeting stile inner frame 33, and is formed in an L shape having the first elastic material 4471 and the second elastic material 4472 integrally. As shown in Figures 15 and 16, the first elastic material 4471 is compressed by being sandwiched between the outdoor side end surface 4461e, which is the flat surface of the inner circumferential covering material 4461, and the inner circumferential covering material engaging portion 4452b of the attachment 445. The second elastic material 4472 is compressed by being sandwiched between the outdoor side X1 end of the inner surface 4461f facing the inner circumferential side of the inner circumferential covering material 4461, and the outdoor side X1 end of the inner circumferential side wall portion 4452 of the attachment 445.

[0146] In the elastic material 447, the first elastic material 4471, by being sandwiched between the inner circumferential covering material 4461 and the attachment 445, applies a pressing force F1 toward the indoor side X2 to the inner circumferential covering material 4461, as shown in Figure 16, and biases the indoor side end face 4461d of the inner circumferential covering material 4461 to contact the protruding piece 4452c while maintaining the engagement between the inner circumferential covering material 4461 and the inner circumferential covering material engagement portion 4452b. As a result, the inner circumferential covering material 4461 is positioned in the depth direction by the protruding piece 4452c, so that the position of the inner circumferential covering material 4461 is consistently aligned regardless of manufacturing variations in the depth dimensions of the inner circumferential covering material 4461, improving the aesthetic appearance.

[0147] Furthermore, the second elastic material 4472, by being sandwiched between the inner circumferential covering material 4461 and the attachment 445, applies a pressing force F3 toward the inner circumferential side to the outer-side X1 end of the inner circumferential covering material 4461, as shown in Figure 16, due to the elastic repulsive force generated, thereby biasing the outer-side X1 end of the inner circumferential covering material 4461 in a direction that engages with the inner circumferential covering material engagement portion 4452b. As a result, the inner circumferential covering material 4461 is held and temporarily fixed between the inner circumferential covering material engagement portion 4452b of the attachment 4455 and the protruding piece 4452c, with the inner circumferential covering material 4461 positioned in the depth direction by the protruding piece 4452c.

[0148] By interposing the elastic material 447 between the inner circumferential covering material 4461 and the attachment 445, the inner circumferential covering material 4461 is prevented from directly contacting the attachment 445 at the end of the outdoor side X1. As a result, impact noises such as those caused when opening and closing the inner sashes 3 and 4 or when pressure is applied to the entire inner sash 4 are also reduced.

[0149] Although the elastic material 447 is formed integrally in an L-shape with a first elastic material 4471 and a second elastic material 4472, the elastic material 447 may also consist of two separate members, the first elastic material 4471 and the second elastic material 4472. The elastic material 447 may be formed in a long length and arranged along the entire length in the extension direction of the attachment 445, or it may be formed in a short length and arranged in fragments at intervals along the extension direction of the attachment 445.

[0150] As shown in Figures 15 and 16, the inner circumferential side wall portion 4452 of the attachment 445 has a plurality of protrusions 445b that project toward the inner circumferential covering material 4461. Each protrusion 445b extends along the entire length in the extension direction of the attachment 445. Therefore, when the inner circumferential covering material 4461 is held along the inner circumferential side wall portion 4452 of the attachment 445, a gap equal to the protrusion height of the protrusions 445b is formed between the inner circumferential covering material 4461 and the attachment 445. As a result, as shown in Figure 16, a ventilation channel Vc4 is formed between the inner circumferential covering material 4461 and the attachment 445.

[0151] The second covering material, the indoor covering material 4462, is formed in an L-shape and integrally comprises an indoor portion 4462a and an inner circumferential portion 4462b extending from the inner circumferential end of the indoor portion 4462a toward the outdoor side X1.

[0152] The interior portion 4462a is positioned along the outer surface of the interior wall portion 4451 of the attachment 445. The outer surface of the interior portion 4462a facing the interior X2 is a flat surface over its entire surface and constitutes the visible surface of the interior X2 of the butt joint frame 44.

[0153] The inner circumferential portion 4462b has a thickness approximately the same as that of the inner circumferential covering material 4461. The outer end of the inner circumferential portion 4462b on the outdoor side X1 has an opposing surface 4462c that is positioned opposite to the opposing surface 4461b of the inner circumferential covering material 4461. The opposing surface 4462c is formed along the entire length in the extension direction of the indoor covering material 4462. This opposing surface 4462c is formed by an inclined surface that is inclined parallel to the opposing surface 4461b of the inner circumferential covering material 4461 at the same angle as the inclination. Specifically, as shown in Figures 15 and 16, the opposing surface 4462c is formed by the inner surface of the inner circumferential portion 4462b facing the attachment 445 inclining linearly so as it approaches the outdoor side X1, away from the inner circumferential wall portion 4452 of the attachment 445. The opposing surface 4462c is inclined to cover the opposing surface 4461b of the inner circumferential covering material 4461 from the outer surface 4461c side of the inner circumferential covering material 4461. The opposing surface 4461b of the inner circumferential covering material 4461 is inclined to slide under the opposing surface 4462c from the inner circumferential wall portion 4452 side of the attachment 445. The tip of the outdoor side X1 of the opposing surface 4462c has a notch 4462d that is cut out obliquely in a direction substantially perpendicular to the inclination direction of the opposing surface 4462c.

[0154] The indoor covering material 4462 is attached to the attachment 445 from the indoor side X2 with multiple double-sided adhesive tapes 448, 448 interposed between them. More specifically, the indoor covering material 4462 is attached with multiple double-sided adhesive tapes 448, 448 interposed between the indoor portion 4462a and the indoor wall portion 4451 of the attachment 445. The inner circumferential side portion 4462b is positioned to face the inner circumferential side wall portion 4452 of the indoor side X2 more than the protruding piece 4452c of the attachment 445. The opposing surface 4462c of the inner circumferential side portion 4462b is positioned in contact with the opposing surface 4461b of the inner circumferential covering material 4461.

[0155] At this time, the outer end of the inner circumference portion 4462b of the indoor covering material 4462 on the outdoor side X1 is positioned further out on the outdoor side X1 than the position of the protruding piece 4452c of the attachment 445, as shown in Figure 16. The opposing surface 4462c of the inner circumference portion 4462b is positioned to cover the protruding piece 4452c. The opposing surface 4461b of the inner circumference covering material 4461 is inserted and held between the opposing surface 4462c of the inner circumference portion 4462b and the inner circumference side wall portion 4452 of the attachment 445. In this state, the indoor covering material 4462 is fixed to the attachment 445 by screws 449 that are driven from the outdoor side X1 through the indoor side wall portion 4451 of the attachment 445 and into the indoor side portion 4462a of the indoor covering material 4462. Screws 449 are driven into the upper and lower ends of the attachments 445 that protrude from the top and bottom of the butt joint frame body 444. As the interior covering material 4462 is fixed to the attachment 445, the inner perimeter covering material 4461 is also fixed to the attachment 445.

[0156] Multiple double-sided adhesive tapes 448, 448 extend along the extension direction of the butt joint frame 44 and are spaced apart from each other in the left-right direction. As a result, a gap equivalent to the thickness of the double-sided adhesive tape 448 is formed between the indoor covering material 4462 and the indoor wall portion 4451 of the attachment 445. This gap constitutes a ventilation channel. This allows for drainage even if condensation occurs on the indoor wall portion 4451, and prevents the indoor covering material 4462 from coming into contact with the condensation and getting wet, while also promoting drying through ventilation. The double-sided adhesive tape 448 may be formed in long lengths and arranged along the entire length of the butt joint frame 44 in the extension direction, or, to improve ventilation, it may be formed in short lengths and arranged in fragments at intervals along the extension direction of the butt joint frame 44.

[0157] When the attachment 445 and the indoor covering material 4462 are fixed together with screws, the interposed member placed between them can be any gap-forming member having a thickness that allows for the formation of a gap constituting a ventilation channel, and is not necessarily limited to the double-sided adhesive tape 448. Examples of gap-forming members other than the double-sided adhesive tape 448 include elastic members made of rubber, resin, etc., in the form of tape or sheets.

[0158] As shown in Figures 7, 15, and 16, a projection 445c is formed on the outer periphery of the indoor wall portion 4452 of the attachment 445, projecting toward the indoor side X2, and a projection 445d is formed on the inner periphery of the indoor wall portion 4452, projecting toward the inner side. As a result, when attaching the indoor covering material 4462 to the attachment 445, the outer periphery of the indoor covering material 4462 abuts against the projection 445c, thereby ensuring a ventilation passage between the indoor covering material 4462 and the indoor wall portion 4452 of the attachment 445. This ventilation passage is blocked by the projection 445c at the outer periphery of the indoor covering material 4462, making it less visible from the indoor side X2 and improving the aesthetic appearance. Furthermore, when attaching the indoor covering material 4462 to the attachment 445, even if the indoor covering material 4462 is shifted outward relative to the attachment 445, it will still come into contact with the protrusion 445d. This prevents surface contact between the inner circumferential side portion 4462b of the indoor covering material 4462 and the inner circumferential side wall portion 4452 of the attachment 445, thus ensuring an airflow path between them.

[0159] In this way, the indoor covering material 4462 is fixed to the attachment 445, and the inner circumferential covering material 4461, which is held by the opposing surface 4462c of the inner circumferential side portion 4462b of the indoor covering material 4462, is fixed between the opposing surface 4462c and the inner circumferential covering material engagement portion 4452b of the attachment 445. The butt joint frame covering material 446 is composed of two parts, the inner circumferential covering material 4461 and the indoor covering material 4462. However, the fixing work of the butt joint frame covering material 446 is done simply by fixing the indoor covering material 4462 to the attachment 445 with screws 449, which simultaneously holds and fixes the indoor side X2 end of the inner circumferential covering material 4461. Therefore, it is not necessarily required to fix the inner circumferential covering material 4461 to the attachment 445 using screws, double-sided adhesive tape, etc. For this reason, even if the covering material is divided into multiple parts, it can be easily installed with a small number of parts.

[0160] Since the opposing surface 4462c of the inner circumference portion 4462b of the indoor covering material 4462 and the opposing surface 4461b of the inner circumference covering material 4461 are both formed by inclined surfaces, there is no need to perform complex processing to combine and engage them with each other, and there is no risk of them becoming unable to butt together due to misalignment of surfaces caused by manufacturing errors, etc. Because the opposing surfaces 4461b and 4462c face each other at an angle due to inclined surfaces, even if a small gap occurs between the opposing surfaces 4461b and 4462c due to dimensional misalignment caused by shrinkage of the inner circumference covering material 4461, there is no risk of the internal attachment 445 being visible through the gap between them.

[0161] As shown in Figure 16, a notch 4462d is provided at the tip of the opposing surface 4462c of the inner circumference side portion 4462b of the interior covering material 4462. Therefore, a V-shaped groove 4463 is formed between the opposing surface 4462c of the inner circumference side portion 4462b and the opposing surface 4461b of the interior covering material 4461. Since the opposing surface 4462c of the inner circumference side portion 4462b does not have a sharp tip, it is possible to prevent damage to the tip of the opposing surface 4462c when it collides with something during installation of the interior covering material 4462 or when setting up the interior sash 4, or due to deterioration from long-term use. Therefore, the good design quality of the butt joint frame covering material 446 can be maintained for a long period of time.

[0162] Furthermore, the formation of a groove 4463 between opposing surfaces 4461b and 4462c makes it difficult to notice changes in the gap when the inner circumferential covering material 4461 and the indoor covering material 4462 are combined, and even if a small gap occurs between opposing surfaces 4461b and 4462c, the aesthetic appearance is less likely to deteriorate. Moreover, since the groove 4463 is positioned on the visible surface of the butt joint frame 44, it is not noticeable even when the butt joint frame 44 is viewed from the front on the indoor side X2.

[0163] [Outer frame of the outer shoji screen] The meeting stiles 53 and 63, which are positioned on the door-end sides of the outer sash 5 and inner sash 6, respectively, and which slide between the same outer upper rail 21a and outer lower rail 22a, are positioned to overlap the meeting stiles 33 and 43 of the inner sash 3 and 4 on the outer side X1 when the inner sashes 3 and 4 and outer sashes 5 and 6 are closed, as shown in Figures 1, 2 and 6, and constitute the meeting sections 10A and 10A. Figure 6 shows the meeting stile outer stile 53 of the outer sash 5, but since the meeting stile outer stile 63 of the outer sash 6 is positioned symmetrically to that in Figure 6, the illustration and explanation of the meeting stile outer stile 63 of the outer sash 6 corresponding to Figure 6 will be based on the explanation of the meeting stile outer stile 53 of the outer sash 5 and will be omitted below.

[0164] As shown in Figure 6, the meeting stile outer frame 53 of the outer sash 5 has a metal meeting stile outer frame body 531 made of aluminum or the like, and a resin cover 532. The meeting stile outer frame body 531 is composed of an outdoor wall portion 5311, an indoor wall portion 5312, an outer peripheral wall portion 5313, and an inner peripheral wall portion 5314, and has a hollow portion S53 inside that is surrounded by these portions. The meeting stile outer frame body 531 is provided so as to protrude X2 on the indoor side from the surface material G. The outdoor wall portion 5311 extends inward from the inner peripheral wall portion 5314 and integrally has a surface material support portion 5315 that supports the outdoor side X1 surface of the surface material G.

[0165] Near the outer edge of the interior wall portion 5312, a projection portion 5316 is formed, which is bent in an L-shape toward the interior X2 and inward. As shown in Figure 6, when the interior sashes 3, 4 and the exterior sashes 5, 6 are closed, the projection portion 5316 is inserted into and engages with a recess 3311a provided in the meeting stile interior frame 33 of the interior sash 3, forming a labyrinth structure. Further outward from the projection portion 5316, a fin member 5317 is attached, which protrudes from the meeting stile exterior frame body 531 toward the interior X2. When the interior sashes 3, 4 and the exterior sashes 5, 6 are closed, the fin member 5317 abuts against the surface material support portion 3317 in the meeting stile interior frame 33 of the interior sash 3 from the exterior X1, maintaining an airtight state.

[0166] The resin cover 532 is attached to the indoor side X2 end of the inner circumferential wall portion 5314. The resin cover 532 is integrally composed of a cover body portion 5321, an engaging portion 5322, and a surface material support portion 5323. The cover body portion 5321 extends inward from the indoor side X2 end of the inner circumferential wall portion 5314. The cover body portion 5321 has a hollow structure and, together with the indoor side wall portion 5312 of the meeting stile outer frame body 531, forms the visible surface of the indoor side X2 of the meeting stile outer frame 53. The engaging portion 5322 is located at the outer circumferential end of the cover body portion 5321. The resin cover 532 is attached to the indoor side wall portion 5312 by the engaging portion 5322. The surface material support portion 5323 extends outward from the inner side end of the cover body portion 5321 towards the outdoor side X1. The end of the facing material G on the meeting stile outer frame 53 side is housed and supported between the facing material support portion 5315 of the meeting stile outer frame body 531 and the facing material support portion 5323 of the resin cover 532.

[0167] [The leading edge of the outer shoji screen] As shown in Figures 4 and 5, the door frame 54 and 64 of the outer sliding doors 5 and 6 have a door frame body 541 and 641, attachments 542 and 642, and door frame covering material 543 and 643. The door frames 54 and 64 have the same structure and are arranged symmetrically.

[0168] (Door frame body) The door frame bodies 541, 641 are made of extruded metal profiles such as aluminum and are composed of exterior wall sections 5411, 6411, interior wall sections 5412, 6412, outer peripheral wall sections 5413, 6413, and inner peripheral wall sections 5414, 6414, with hollow sections S54, S64 enclosed on the inside. The exterior wall sections 5411, 6411 have a shape that is partially recessed toward the interior X2. As a result, the exterior wall sections 5411, 6411 constitute a handle when opening and closing the exterior sashes 5, 6 from the exterior X1.

[0169] The exterior wall portions 5411 and 6411 extend further inward than the interior wall portions 5414 and 6414, and integrally have panel support portions 5415 and 6415 that support the exterior surface X1 at the end of the panel material G on the door frame side 54 and 64.

[0170] At the ends of the outer-side wall portions 5413 and 6413 on the outdoor side X1, outdoor extension portions 5416 and 6416 are integrally provided, projecting toward the outer periphery opposite to the surface material support portions 5415 and 6415. Fin members 5416a and 6416a are attached to the outdoor extension portions 5416 and 6416. The fin members 5416a and 6416a are provided in an elongated shape along the extension direction of the door frame 54 and 64. The fin members 5416a and 6416a project toward the indoor side X2 from the outdoor extension portions 5416 and 6416. When the outer sashes 5 and 6 are closed, the fin members 5416a and 6416a contact the engaging projections 234 and 244 of the vertical frames 23 and 24 from the outside X1, maintaining an airtight seal between them and the vertical frames 23 and 24.

[0171] At the ends of the indoor side X2 of the outer peripheral wall portions 5413, 6413, indoor extension portions 5417, 6417 are integrally provided, projecting outward toward the outer periphery parallel to the outdoor extension portions 5416, 6416. Pulling members 5418, 6418 are provided between the outdoor extension portions 5416, 6416 and the indoor extension portions 5417, 6417.

[0172] (attachment) Attachments 542 and 642 are components that make up the door frame 54 and 64. Attachments 542 and 642 are positioned to cover the visible surface X2 on the interior side of the door frame 541 and 641 along their entire length in the direction of extension. Figure 17 shows attachment 542 of door frame 54. Attachments 642 of door frame 64 are positioned symmetrically to attachment 542.

[0173] As shown in Figures 4, 5, and 17, the attachments 542 and 642 have rectangular hollow sections 5422 and 6422 at the outer peripheral ends of the flat attachment bodies 5421 and 6421. The attachment bodies 5421 and 6421 are provided with outer peripheral engaging sections 5423 and 6423 and outer peripheral engaging sections 5424 and 6424 that protrude in an L-shape toward the outdoor side X1. The outer peripheral engaging sections 5423 and 6423 engage with the outer peripheral ends of the indoor extensions 5417 and 6417 of the door frame bodies 541 and 641. The outdoor inner circumferential engaging portions 5424, 6424 engage with L-shaped pieces 5412a, 6412a that are provided projecting to the indoor side X2 at the inner circumferential ends of the indoor wall portions 5412, 6412 of the door frame body 541, 641. As a result, the attachments 542, 642 are attached to the door frame body 541, 641 so as to cover the visible surface of the indoor side X2 of the door frame body 541, 641. The hollow portions 5422, 6411 are positioned on the indoor side X2 of the indoor extension portions 5417, 6417 of the door frame body 541, 641, as shown in Figures 4 and 5.

[0174] The attachment bodies 5421 and 6421 extend inward from the outdoor inner circumference engaging portions 5424 and 6424. As a result, attachments 542 and 642 have surface material support portions 5425 and 6425 that support the indoor side X2 surface of the surface material G. The surface material G is housed and supported between the surface material support portions 5415 and 6415 and the surface material support portions 5425 and 6425.

[0175] Attachments 542,642 have a pair of protruding pieces 5426,5426,6426,6426 at their outer circumference ends that project parallel to the interior side X2, and protruding pieces 5427,6427 at their inner circumference ends that project parallel to the protruding pieces 5426,6426 toward the interior side X2.

[0176] The attachments 542 and 642 are made of metal or resin, for example. If the attachments 542 and 642 are made of metal, they are made of aluminum, for example, but are not limited to aluminum. Because the attachments 542 and 642 are made of metal or resin, the processing accuracy of the attachments 542 and 642 as support parts for the facing material G can be increased compared to the case where the indoor side X2 of the facing material G is supported by a wooden facing material support part, and deterioration of the attachments 542 and 642 over time can be suppressed. As a result, it is possible to suppress the facing material G from easily coming off the door frame 54 and 64. If the attachments 542 and 642 are made of resin, it is possible to suppress the cooling of the side of the door frame covering material 543 and 643 facing the attachments 542 and 642 by cold air from the outdoor side X1, thereby improving the thermal insulation.

[0177] (Door frame covering material) The door frame coverings 543 and 643 are non-metallic frame coverings that constitute the visible surface on the interior side X2 of the door frame 54 and 64, and are arranged to cover the visible surface on the interior side X2 of the attachments 542 and 642 along the entire length in the extending direction of the door frame 54 and 64. The door frame coverings 543 and 643 are decorative materials that improve the aesthetic appearance of the sliding window 1 when viewed from the interior side X2, and in order to ensure the uniformity of the design of the sliding window 1, the same non-metallic material as the upper frame coverings 1300 provided on the upper frames 31, 41, 51, and 61 described above is used. In this embodiment, the same wood as the upper frame coverings 1300 is used for the door frame coverings 543 and 643.

[0178] The inner circumference ends of the door frame covering materials 543 and 643 are integrally formed with handle portions 5431 and 6431 that protrude toward the interior side X2. The handle portions 5431 and 6431 are formed in an elongated manner along the extension direction of the door frame covering materials 543 and 643. Figure 17 shows the door frame covering material 543 of the door frame 54. The door frame covering material 643 of the door frame 64 is arranged symmetrically with the door frame covering material 543.

[0179] The door frame covering material 543,643 is attached to the indoor side X2 of the attachment body 5421,6421 by interposing multiple double-sided adhesive tapes 544,544,644,644 between it and the attachment 542,642, and is attached to the attachment 542,642 by driving screws 545,645 through the attachment body 542,642 from the outdoor side X1.

[0180] At the outer and inner ends of the door frame covering material 543, stepped notches 5432, 5433, 6432, and 6433 are formed along the entire length of the door frame covering material 543, 643, opening toward the exterior X1. The notches 5432, 5433, 6432, and 6433 engage with the outer and inner protruding pieces 5426, 5427, 6426, and 6427 of the attachment 542, 642, from the interior X2. At this time, the protruding pieces 5426, 5427, 6426, and 6427 are fitted into and housed within the notches 5432, 5433, 6432, and 6433, and are covered from the interior X2 by the door frame covering material 543, 643. Therefore, attachments 542 and 642 are difficult to see from the interior side X2.

[0181] The door frame covering material 543 is placed on the indoor side X2 surface of the attachment 542 via multiple double-sided adhesive tapes 544, 544, thereby creating a gap between the attachment 542 and the door frame covering material 543 that corresponds to the thickness of the double-sided adhesive tapes 544. This gap constitutes a ventilation channel. As a result, even if condensation occurs on the indoor side X2 surface of the attachment 542, it is possible to prevent the door frame covering material 543 from coming into contact with the condensation and getting wet, and to promote drying through ventilation. The double-sided adhesive tapes 543 may be formed in long lengths and placed along the entire length in the extending direction of the door frame 54, or they may be formed in short lengths and placed in fragments at intervals in the extending direction of the door frame 54 in order to improve ventilation.

[0182] <Other embodiments of the frame> Figures 18 to 22 show other embodiments of the shoji screen frame. Since parts with the same reference numerals as those described above have the same configuration, their descriptions will be based on the above description and will be omitted below.

[0183] Figure 18 shows the upper frames 31A, 41A, 51A, and 61A of the inner sashes 3 and 4 and the outer sashes 5 and 6. These upper frames 31A, 41A, 51A, and 61A are constructed by attaching a resin frame material 1500 to the indoor side X2 of the upper frame body 1100 in the upper frames 31, 41, 51, and 61 shown in Figure 8, in place of the attachment 1200 and the upper frame covering material 1300.

[0184] The resin frame material 1500 is positioned to cover the visible surface X2 on the indoor side of the upper frame body 1100 along its entire length in the direction of extension. The resin frame material 1500 is composed of an outdoor wall portion 1510, an indoor wall portion 1520, an inner peripheral wall portion 1530, and an outer peripheral wall portion 1540, and has a hollow portion S151 inside the rectangular area enclosed by these portions. A surface material support portion 1550 having a hollow portion S152 is provided on the inner peripheral side of the inner peripheral wall portion 1530. A hollow portion S153 is formed between the outdoor wall portion 1510 of the resin frame material 1500 and the indoor wall portion 1120 of the upper frame body 1100.

[0185] The resin frame material 1500 is attached to the upper frame body 1100 in the same way as the attachment 1200, by upper engaging parts 1511 and lower engaging parts 1512 which are positioned at the outer and inner ends of the outer wall portion 1510, respectively, so as to cover the visible surface X2 on the indoor side. At this time, the depth dimension L12 of the upper frames 31A, 41A, 51A, and 61A is set to be approximately the same as the depth dimension L11 of the upper frames 31, 41, 51, and 61 shown in Figure 8, by appropriately setting the depth dimensions of the hollow portions S151 and S152.

[0186] Figure 19 shows the lower frames 32A, 42A, 52A, and 62A of the inner sashes 3 and 4 and the outer sashes 5 and 6. These lower frames 31A, 41A, 51A, and 61A are constructed by attaching a resin frame material 2500 to the indoor side X2 of the lower frame body 2100 in the lower frames 32, 42, 52, and 62 shown in Figure 10, instead of the attachment 2200 and the lower frame covering material 2300.

[0187] The resin frame material 2500 is positioned to cover the visible surface X2 on the indoor side of the lower frame body 2100 along its entire length in the direction of extension. The resin frame material 2500 is composed of an outdoor wall portion 2510, an indoor wall portion 2520, an inner peripheral wall portion 2530, and an outer peripheral wall portion 2540, and has a hollow portion S251 inside the rectangular area enclosed by these portions. A hollow structure surface material support portion 5550 having a hollow portion S252 is provided on the inner peripheral side of the inner peripheral wall portion 2530. A hollow portion S253 is formed between the outdoor wall portion 2510 of the resin frame material 2500 and the indoor wall portion 2120 of the lower frame body 2100.

[0188] The resin frame material 2500 is attached to the lower frame body 2100 in the same way as the attachment 2200, by upper engaging parts 2511 and lower engaging parts 2512 which are positioned at the outer and inner ends of the outer wall portion 2510, respectively, so as to cover the visible surface X2 on the indoor side. At this time, the depth dimension L22 of the lower frames 31A, 41A, 51A, and 61A is set to be approximately the same as the depth dimension L21 of the lower frames 32, 42, 52, and 62 shown in Figure 10 by appropriately setting the depth dimensions of the hollow portions S251 and S252.

[0189] Figure 20 shows the meeting stile inner frame 33A of the inner sliding doors 3 and 4. This meeting stile inner frame 33A is constructed by attaching a resin frame material 338 to the meeting stile body 331 of the meeting stile inner frame 33 shown in Figure 6, in place of the attachment 332 and the meeting stile inner frame covering material 333.

[0190] The resin frame material 338 is positioned to cover the meeting stile inner frame body 331 along its entire length in the direction of extension. The resin frame material 338 is composed of an indoor side wall portion 3381, an outer periphery side depth wall portion 3382, and an inner periphery side depth wall portion 3383. On the outdoor side X1 of the indoor side wall portion 3381, a first partition wall portion 3384 and a second partition wall portion 3385 are formed, which are arranged substantially parallel to the indoor side wall portion 3381. As a result, hollow portions S338a and S338b are formed between the indoor side wall portion 3381 and the first partition wall portion 3384, and between the first partition wall portion 3384 and the second partition wall portion 3385, respectively.

[0191] The widths of the interior wall portion 3381, the first partition wall portion 3384, and the second partition wall portion 3385 are greater than the width of the interior wall portion 3312 of the meeting stile interior frame body 331. Therefore, the outer peripheral projection wall portion 3382 is positioned away from the outer peripheral wall portion 3313 of the meeting stile interior frame body 331, and the inner peripheral projection wall portion 3383 is positioned away from the second inner peripheral wall portion 3315 of the meeting stile interior frame body 331. The inner peripheral projection wall portion 3383 has a projection 3383a that protrudes toward the second inner peripheral wall portion 3315 of the meeting stile interior frame body 331, and is supported away from the second inner peripheral wall portion 3315 by the projection height of the projection 3383a.

[0192] At the outdoor end X1 of the outer peripheral wall portion 3382, a hollow portion S338c is provided that protrudes rectangularly toward the outer peripheral wall portion 3313 of the meeting stile inner frame body 331. On the indoor side X2 of the hollow portion S338c, a hollow portion S338d is provided that extends at a distance from the hollow portion S338c to the position of the partition wall portion 3316 of the meeting stile inner frame body 331, and protrudes rectangularly toward the outer peripheral wall portion 3313 of the meeting stile inner frame body 331. The outer peripheral wall portion 3382 is supported from the outer peripheral wall portion 3313 of the meeting stile inner frame body 331 by a distance equal to the protruding height of the hollow portions S338c and S338d. Furthermore, the strength of the outer peripheral wall portion 3382 is increased by the hollow portions S338c and S338d. Therefore, the mounting screw 351 of the crescent lock 35 penetrates the outer peripheral wall portion 3382 between the hollow portion S338c and the hollow portion S338d.

[0193] The resin frame material 338 is attached to the meeting stile inner frame body 331 in the same way as the attachment 332 by a first engaging portion 3382a provided at the outdoor side X1 end of the outer peripheral wall portion 3382 and a second engaging portion 3383a provided near the outdoor side X1 end of the inner peripheral wall portion 3383. The outdoor side X1 end of the inner peripheral wall portion 3383 extends further outward X1 than the second engaging portion 3383a and constitutes a surface material support portion 3383b that supports the indoor side X2 surface of the surface material G.

[0194] The visible dimensions L32 on the left and right sides of the meeting stile interior frame 33A, to which the resin frame material 338 is attached to the meeting stile interior frame body 331, are set to be approximately the same as the visible dimension L31 of the meeting stile interior frame 33 shown in Figure 6, by appropriately setting the visible dimensions of the interior wall portion 3381 and the hollow portions S338c and S338d. Furthermore, the depth dimension L32b of the meeting stile interior frame 33A is set to be approximately the same as the depth dimension L31b of the meeting stile interior frame 33 shown in Figure 6, by appropriately setting the depth dimensions of the hollow portions S338a and S338b.

[0195] Figure 21 shows the butt joint frame 44A of the interior sliding door 4. This butt joint frame 44A is constructed by attaching a resin frame material 440 to the frame covering body 444 of the frame covering portion 442 in the butt joint frame 44 shown in Figure 7, in place of the attachment 445 and the butt joint frame covering material 446.

[0196] The resin frame material 440 is arranged to cover the frame covering body 444 along its entire length in the direction of extension. The resin frame material 440 is composed of an indoor side wall portion 4401 and an inner periphery side facing wall portion 4402. On the outdoor side X1 of the indoor side wall portion 4401, a partition wall portion 4403 is formed, which is arranged substantially parallel to the indoor side wall portion 4401. As a result, a hollow portion S440 is formed between the indoor side wall portion 4401 and the partition wall portion 4403.

[0197] The resin frame material 440 is attached to the frame covering body 444 in the same way as the attachment 445 by a first engaging portion 4404a provided on the outer peripheral end 4404 of the interior wall portion 4401 and a second engaging portion 4402a provided near the exterior end X1 of the interior periphery wall portion 4402. The exterior end X1 of the interior periphery wall portion 4402 extends further toward the exterior X1 than the second engaging portion 4402a and constitutes a surface material support portion 4402b that supports the interior X2 surface of the surface material G.

[0198] The width of the interior wall portion 4401 and the partition wall portion 4403 is greater than the width of the frame covering body 444 extending from the interior wall portion 4443 to the outer peripheral extension portion 4445. Therefore, the inner peripheral wall portion 4402 is positioned further inward relative to the inner peripheral wall portion 4444 of the frame covering body 444. The inner peripheral wall portion 4402 has a projection 4402a that protrudes toward the inner peripheral wall portion 4444 of the frame covering body 444, and is supported further inward relative to the second inner peripheral wall portion 3315 by the projection height of the projection 3383a.

[0199] The partition wall portion 4403 has a projection 4403a that protrudes toward the interior wall portion 4443 of the frame covering body 444, and a projection 4403b that protrudes toward the outer peripheral extension portion 4445 of the frame covering body 444. As a result, the resin frame material 440 is supported on the interior side X2 by a distance equal to the protruding height of the projections 4403a and 4403b relative to the frame covering body 444.

[0200] The left and right visible dimensions L42a of the butt joint frame 44A, to which the resin frame material 440 is attached to the frame covering body 444, are set to be approximately the same as the visible dimension L41a of the butt joint frame 44 shown in Figure 7 by appropriately setting the visible dimension of the interior wall portion 4401 and the projection height of the protrusion 4402b. Furthermore, the depth dimension L42b of the sill butt joint frame 44A is set to be approximately the same as the depth dimension L41b of the butt joint frame 44 shown in Figure 7 by appropriately setting the depth dimension of the hollow portion S440 and the projection height of the protrusions 4403a and 4403b.

[0201] Figure 22 shows the door frame 54A of the outer sliding door 5. This door frame 54A is constructed by attaching a resin frame material 546 to the indoor side X2 of the door frame body 541 of the door frame 54 shown in Figure 4, in place of the attachment 542 and the door frame covering material 543. The door frame of the outer sliding door 6 is arranged symmetrically with this door frame 54A, so its illustration and description are omitted.

[0202] The resin frame material 546 is positioned to cover the visible surface of the door frame body 541 on the interior side X2 along its entire length in the direction of extension. The resin frame material 546 is composed of an exterior wall portion 5461, an interior wall portion 5462, an inner peripheral wall portion 5463, an outer peripheral wall portion 5464, and a partition wall portion 5465. Inside the resin frame material 546, hollow portions S546a and S546b are formed, which are divided into an outer peripheral side and an inner peripheral side by the partition wall portion 5465. The interior wall portion 5462 extends further inward than the inner peripheral wall portion 5463 and is provided with a surface material support portion 54666 that supports the interior side X2 surface of the surface material G. The surface material support portion 5466 has a handle portion 5466a that protrudes toward the interior side X2.

[0203] The resin frame material 546 is attached to the door frame body 541 in the same way as the attachment 542, by outer peripheral engaging parts 5461a and inner peripheral engaging parts 5461b, which are positioned at the outer peripheral end and inner peripheral end of the exterior wall portion 5461, respectively, so as to cover the visible surface X2 on the interior side of the door frame body 541. At this time, the depth dimension L52 of the door frame 54A is set to be approximately the same as the depth dimension L51 of the door frame 54 shown in Figure 4 by appropriately setting the depth dimensions of the hollow portions S546a and S546b.

[0204] Since the above attachments 332, 445, 542, 642, 1200, and 2200 can be detachably engaged with each metal frame body 331, 441, 541, 641, 1100, and 2100, the frame covering materials 333, 446, 543, 643, 1300, and 2300 to which the attachments 332, 445, 542, 642, 1200, and 2200 are fixed can be detachably attached to and replaced with each frame body 331, 441, 541, 641, 1100, and 2100. Therefore, it is possible to arbitrarily choose between two cases where the decorative material on the interior side X2 of each frame body 331, 441, 541, 641, 1100, 2100 is common and the decorative material on the interior side X2 is composed of frame covering materials 333, 446, 543, 643, 1300, 2300 which are attached via attachments, or where it is composed of resin frame materials 338, 440, 546, 1500, 2500. Therefore, in the interior sashes 3, 4 and exterior sashes 5, 6, by replacing the attachments 332, 445, 542, 642, 1200, 2200 and frame covering materials 333, 446, 543, 643, 1300, 2300 with resin frame materials such as 338, 440, 546, 1500, 2500, etc., on the metal frame bodies 331, 441, 541, 641, 1100, 2100, resin frame materials can be easily installed on the interior side X2 of the interior sashes 3, 4 and exterior sashes 5, 6 without significantly changing the depth dimensions of each frame. Since the depth dimensions of each frame body 30, 40, 50, and 60 can be made approximately the same, in renovations, etc., the frame body 2 can be used as is and it is possible to easily replace, for example, a shoji screen with a resin frame material with a shoji screen with a frame covering material of a different material, such as wood, attached via an attachment. Since the frame bodies 331, 441, 541, 641, 1100, and 2100 are common, it is possible to suppress increased capital investment for product manufacturing and increased costs due to an increase in the number of parts.

[0205] In the meeting stile inner frame covering material 333 of the embodiment described above, the indoor covering material 3333 covers the indoor wall portion 3321 of the attachment 332, and a portion of the outer wall portion 3322 and the inner wall portion 3323, respectively, while the outer covering material 3331 and the inner covering material 3332 cover only the outer wall portion 3322 and the inner wall portion 3323 of the attachment 332, but the invention is not limited to this. The indoor covering material 3333 may cover only the indoor wall portion 3321 of the attachment 332, and both or either of the outer covering material 3331 and the inner covering material 3332 may extend to cover a portion of the indoor wall portion 3321 of the attachment 332.

[0206] Similarly, in the butt joint frame covering material 446, the indoor covering material 4462 is not limited to covering the indoor wall portion 4451 and a part of the inner periphery wall portion 4452 of the attachment 445, while the inner periphery covering material 4461 covers only the inner periphery wall portion 4452 of the attachment 445. The indoor covering material 4462 may cover only the indoor wall portion 4451 of the attachment 445, while the inner periphery covering material 4461 may extend to cover a part of the indoor wall portion 4451 of the attachment 445.

[0207] Furthermore, in the meeting stile inner frame covering material 333 of the embodiment described above, the opposing surfaces 3333d and 3333f of the indoor covering material 3333 are formed to cover the opposing surfaces 3331b and 3332b of the outer covering material 3331 and the inner covering material 3332, but the reverse is also possible. That is, the opposing surfaces 3331b and 3332b of the outer covering material 3331 and the inner covering material 3332 may be formed to cover the opposing surfaces 3333d and 3333f of the indoor covering material 3333. In this case, the indoor covering material 3333 is the first covering material, and the outer covering material 3331 and the inner covering material 3332 are the second covering materials. By fixing the outer peripheral covering material 3331 and the inner peripheral covering material 3332 to the attachment 332 with fasteners such as screws, the indoor covering material 3333 can be fixed to the attachment 332 without the need for additional fasteners.

[0208] Similarly, in the butt joint frame covering material 446, the opposing surface 4462c of the indoor covering material 4462 is formed to cover the opposing surface 4461b of the inner periphery covering material 4461, but the reverse is also possible. That is, the opposing surface 4461b of the inner periphery covering material 4461 may be formed to cover the opposing surface 4462c of the indoor covering material 4462. In this case, the indoor covering material 4462 is the first covering material, and the inner periphery covering material 4461 is the second covering material. By fixing the inner periphery covering material 4461 to the attachment 445 with fasteners such as screws, the indoor covering material 4462 can be fixed to the attachment 445 without fasteners.

[0209] The opposing surfaces 3331b, 3332b, 3333d, 3333f, 4461b, and 4462c formed on the meeting stile inner frame covering material 333 and the butt stile covering material 446 consist of straight inclined surfaces. Straight inclined surfaces have the advantage of being easy to process and easily accommodating processing errors. However, the shape of the opposing surfaces is not limited to straight inclined surfaces; any opposing surface that can cover the other opposing surface by sandwiching it between the attachments 332 and 445 is acceptable. Therefore, the opposing surfaces may, for example, be formed in a stepped shape that engages complementaryly with each other.

[0210] The frame covering material that covers one side of the attachments 332 and 445, such as the outer peripheral side wall portion 3322 and the inner peripheral side wall portion 3323 of the meeting stile inner frame covering material 333, and the inner peripheral side covering material 4461 of the butt joint frame covering material 446, may be divided into two or more parts. In this case, for example, the protruding pieces 3322c, 3323c of the attachment 332 and the protruding piece 4452c of the attachment 445 may be provided with an elastic material having the same elasticity as the elastic materials 334, 335, and 447.

[0211] <Other embodiments of joinery> The sliding window 1 described above is constructed by housing four inner sashes 3, 4 and outer sashes 5, 6 on the inner circumference of the frame 2. However, a sliding window may also consist of only two sashes, an inner sash and an outer sash, on the inner circumference of the frame 2. In that case, the vertical frame that pulls the outer sash towards when closed can have the same configuration as the vertical frame 23 shown in Figure 4, and the configuration of the meeting stile can have the same configuration as in Figure 6. The configuration of one of the vertical frames of the frame 2 that pulls the inner sash towards when closed can be, for example, the configuration of the vertical frame 24A shown in Figure 23, instead of the configuration of the vertical frame 24 shown in Figure 5. In Figure 23, parts with the same reference numerals as in Figure 5 indicate parts with the same configuration, so their explanations will refer to the explanation of the configuration shown in Figure 5, and only the differences will be explained below.

[0212] In Figure 23, the inner sash 6A, which is pulled towards the vertical frame 24A when closed, has the same configuration as the outer sash 6 shown in Figure 5. The inner sash 6A is housed between the indoor-side upper rail 21b of the upper frame 21 and the indoor-side lower rail 22b of the lower frame 22. When closed, the inner sash 6A is pulled towards the angle portion 245 relative to the vertical frame 24A, so the vertical frame 24A is not provided with the attachment 246 and vertical frame covering material 247 of the vertical frame 24 shown in Figure 5. In this case, the engaging projection 244A, which engages with the door frame 64 of the inner sash 6A when closed, is positioned on the indoor side X2 of the structural mounting plate portion 242.

[0213] Figures 24 to 30 show joinery according to another embodiment. This joinery consists of an opening window 1A that is installed in a rectangular opening 110 of the building frame 100. The opening window 1A consists of a frame 7 that is installed in the opening 110 and a sash 8 that is housed on the inner circumference of the frame 7 so as to open toward the exterior X1.

[0214] The frame 7 is constructed by framing an upper frame 71, a lower frame 72, and a pair of left and right vertical frames 73, 74 in a rectangular shape around all four sides. On the indoor side X2 of the frame 7, frame members 130 (upper frame member 131, lower frame member 132, and vertical frame members 133, 134) are attached around all four sides, top, bottom, left, and right. Exterior material 120 is provided on the outdoor side X1 of the building structure 100, and interior material 140 is provided on the indoor side X2.

[0215] As shown in Figure 25, the upper frame 71 consists of an outdoor upper frame member 711 and an indoor upper frame member 712, both made of extruded metal profiles such as aluminum, connected by a bridge member 713 made of resin or other heat-insulating material. A cover member 714 is attached to the inner circumference of the upper frame 71, extending from the indoor end X2 of the outdoor upper frame member 711 to the indoor upper frame member 712. The cover member 714 is made of resin, but may be made of metal such as aluminum. The cover member 714 is formed to be elongated along the extension direction of the upper frame 71. An angle portion 714a extending toward the indoor end X2 of the cover member 714 is integrally formed. The angle portion 714a is positioned flush with the inner surface 131a of the upper frame member 131, which is located on the indoor side X2 of the upper frame 71.

[0216] An upper frame covering material 716 is provided on the inner circumference of the cover member 714 via an attachment 715. The attachment 715 is made of resin, but may be made of metal such as aluminum. The attachment 715 is formed to be elongated along the extending direction of the upper frame 71. As shown in Figure 27, the attachment 715 is detachably attached to the inner circumference of the cover member 714 by a pair of engaging pieces 715a, 715a that extend toward the outer circumference.

[0217] The upper frame covering material 716 is a non-metallic decorative material that improves the aesthetic appearance of the casement window 1A when viewed from the interior side X2, and in this embodiment, the same type of wood as the frame covering material used in the sliding window 1 described above is used. The upper frame covering material 716 extends in a long length along the extension direction of the upper frame 71. As shown in Figure 27, the upper frame covering material 716 has an inner circumferential surface portion 7161 that spans between the interior side X2 of the sash 8 and the angle portion 714a, and an interior side portion 7162 that rises from the end of the inner circumferential surface portion 7161 on the interior side X2 toward the outer periphery. The upper frame covering material 716 is positioned to protrude inward from the angle portion 714a.

[0218] The upper frame covering material 716 is fixed to the attachment 715 by screws 717 driven in from the outer circumference of the attachment 715, with multiple double-sided adhesive tapes 716a interposed between the upper frame covering material 716 and the attachment 715. This creates a gap between the upper frame covering material 716 and the attachment 715 that corresponds to the thickness of the double-sided adhesive tapes 716a. This gap constitutes a ventilation channel. This prevents the upper frame covering material 716 from coming into contact with condensation water generated on the attachment 715 and getting wet, and also promotes drying through ventilation.

[0219] As shown in Figure 25, the lower frame 72 consists of an outdoor lower frame member 721 and an indoor lower frame member 722, both made of extruded metal profiles such as aluminum, connected by a bridge member 723 made of resin or other heat-insulating material. A cover member 724 is attached to the inner circumference of the lower frame 72, extending from the indoor X2 end of the indoor lower frame member 721 to the indoor lower frame member 722. The cover member 724 is made of resin, but may be made of metal such as aluminum. The cover member 724 is formed to be elongated along the extension direction of the lower frame 72. An angle portion 724a extending toward the indoor X2 is integrally formed at the indoor X2 end of the cover member 724. The angle portion 724a is positioned flush with the inner surface 132a of the lower frame member 132, which is located on the indoor X2 of the lower frame 72.

[0220] A lower frame covering material 726 is provided on the inner circumference of the cover member 724 via an attachment 725. The attachment 725 is made of resin, but may be made of metal such as aluminum. The attachment 725 is formed to be elongated along the extending direction of the lower frame 72. As shown in Figure 28, the attachment 725 is detachably attached to the inner circumference of the cover member 724 by a pair of engaging pieces 725a, 725a that extend toward the outer circumference.

[0221] The lower frame covering material 726 is a non-metallic decorative material that improves the aesthetic appearance of the casement window 1A when viewed from the interior side X2. In this embodiment, the same wood as the upper frame covering material 716 provided on the upper frame 71 is used to ensure design uniformity. The lower frame covering material 726 is formed in a long length along the extension direction of the lower frame 72. As shown in Figure 28, the lower frame covering material 726 is provided between the interior side X2 of the sash 8 and the angle portion 724a. The inner surface of the lower frame covering material 726 is arranged to be substantially flush with the inner surface of the angle portion 724a.

[0222] The lower frame covering material 726 is fixed to the attachment 725 by screws 727 driven in from the outer circumference of the attachment 725, with multiple double-sided adhesive tapes 726a interposed between the lower frame covering material 726 and the attachment 725. This creates a gap between the lower frame covering material 726 and the attachment 725 that corresponds to the thickness of the double-sided adhesive tapes 726a. This gap constitutes a ventilation channel. This prevents the lower frame covering material 726 from coming into contact with condensation water generated on the attachment 725 and getting wet, and also promotes drying through ventilation.

[0223] As shown in Figure 26, the vertical frames 73 and 74 are made of extruded metal profiles such as aluminum and have flat vertical frame bodies 731 and 741 that extend in the depth direction. Cover members 732 and 742 are attached to the ends of the vertical frame bodies 731 and 741 on the indoor side X2. The cover members 732 and 742 are made of resin, but may be made of metal such as aluminum. The cover members 732 and 742 are formed to be elongated along the extension direction of the vertical frames 73 and 74. Angle portions 732a and 742a are integrally formed at the ends of the cover members 732 and 742 on the indoor side X2, extending toward the indoor side X2. The angle portions 732a and 742a are arranged flush with the inner circumferential surfaces 133a and 134a of the vertical frame members 133 and 134 which are arranged on the indoor side X2 of the vertical frames 73 and 74.

[0224] Vertical frame covering members 734 and 744 are provided on the inner circumference of the cover members 732 and 742 via attachments 733 and 734. The attachments 734 and 744 are made of resin, but may be made of metal such as aluminum. The attachments 734 and 744 are formed to be elongated along the extension direction of the vertical frames 73 and 74. As shown in Figures 29 and 30, the attachments 734 and 744 are detachably attached to the inner circumference of the cover members 732 and 742 by a pair of engaging pieces 734a, 734a, 744a, 744a that extend toward the outer circumference.

[0225] The vertical frame covering materials 734 and 744 are non-metallic decorative materials that improve the aesthetic appearance of the casement window 1A when viewed from the interior side X2. In this embodiment, the same wood as the upper frame covering material 716 provided on the upper frame 71 is used to ensure design uniformity. The vertical frame covering materials 734 and 744 are formed in elongated lengths along the extension direction of the vertical frames 73 and 74. As shown in Figures 29 and 30, the vertical frame covering materials 734 and 744 are provided between the interior side X2 of the sash 8 and the angle portions 732a and 742a. ​​The inner circumferential surfaces of the vertical frame covering materials 734 and 744 are arranged to be substantially flush with the inner circumferential surfaces of the angle portions 732a and 742a.

[0226] The vertical frame covering materials 734, 744 are fixed to the attachments 734, 744 by screws 735, 745 driven from the outer circumference of the attachments 734, 744, with multiple double-sided adhesive tapes 734a, 744a interposed between them. This creates a gap between the vertical frame covering materials 734, 744 and the attachments 734, 744 that corresponds to the thickness of the double-sided adhesive tapes 734a, 744a. This gap constitutes a ventilation channel. This allows condensation water generated on the attachments 734, 744 to flow down and be drained, prevents the vertical frame covering materials 734, 744 from coming into contact with the attachments 734, 744 and getting wet, and also promotes drying through ventilation.

[0227] The shoji screen 8 is constructed by assembling an upper frame 81, a lower frame 82, and a pair of left and right vertical frames 83, 84 in a rectangular shape around its perimeter. The facing material G is housed within the inner circumference of this frame body 80. The facing material G consists of triple-pane glass with three panes of glass Ga, Ga, Ga, laminated with spacers Gb running along its four edges. However, the facing material G is not limited to triple-pane glass; it may also consist of single-pane glass or double-pane glass. The facing material G may also consist of four or more panes of glass. The facing material G may also consist of a panel that does not transmit light. On one of the vertical frames 84, a handle 85 for opening and closing is provided on the interior side X2 of the facing material G.

[0228] As shown in Figure 25, the upper frame 81 has an upper frame covering material 813 attached to the indoor side X2 end of the upper frame body 811, which is made of an extruded metal profile such as aluminum, via an attachment 812. The attachment 812 is made of resin, but may be made of metal such as aluminum. The attachment 812 is formed to be elongated along the extension direction of the upper frame 81. As shown in Figure 27, the attachment 812 is detachably attached to the indoor side X2 of the upper frame body 811 by a pair of L-shaped pieces 812a, 812a that protrude toward the outdoor side X1.

[0229] The upper frame covering material 813 is a non-metallic decorative material that improves the aesthetic appearance of the casement window 1A when viewed from the interior side X2. In this embodiment, the same wood as the upper frame covering material 716 provided on the upper frame 71 is used to ensure design uniformity. The upper frame covering material 813 is formed in a long length along the extension direction of the upper frame 81. As shown in Figure 27, the upper frame covering material 813 is positioned between the interior side X2 of the upper end of the facing material G of the sash 8 and the upper frame covering material 716. The inner surface of the upper frame covering material 813 is positioned substantially flush with the inner surface of the upper frame covering material 716.

[0230] The upper frame covering material 813 is fixed to the attachment 812 by screws 814 driven in from the outdoor side X1 of the attachment 812, with multiple double-sided adhesive tapes 813a interposed between the upper frame covering material 813 and the attachment 812. This creates a gap between the upper frame covering material 813 and the attachment 812 that corresponds to the thickness of the double-sided adhesive tapes 813a. This gap constitutes a ventilation channel. This prevents the upper frame covering material 813 from coming into contact with condensation water generated on the attachment 812 and getting wet, and also promotes drying through ventilation.

[0231] As shown in Figure 24, the bottom frame 82 has a bottom frame covering material 823 attached to the indoor side X2 end of the bottom frame body 821, which is made of an extruded metal profile such as aluminum, via an attachment 822. The attachment 822 is made of resin, but may be made of metal such as aluminum. The attachment 822 is formed to be elongated along the extension direction of the bottom frame 82. As shown in Figure 28, the attachment 822 is detachably attached to the indoor side X2 of the bottom frame body 821 by a pair of L-shaped pieces 822a, 822a that protrude toward the outdoor side X1.

[0232] The lower frame covering material 823 is a non-metallic decorative material that improves the aesthetic appearance of the casement window 1A when viewed from the interior side X2. In this embodiment, the same wood as the upper frame covering material 716 provided on the upper frame 71 is used to ensure design uniformity. The lower frame covering material 823 is formed in a long length along the extension direction of the lower frame 82. As shown in Figure 28, the lower frame covering material 823 is positioned between the interior side X2 of the lower end of the facing material G of the sash 8 and the lower frame covering material 726. The inner surface of the lower frame covering material 823 is substantially flush with the inner surface of the lower frame covering material 726.

[0233] The lower frame covering material 823 is fixed to the attachment 822 by screws 824 driven in from the outdoor side X1 of the attachment 822, with multiple double-sided adhesive tapes 823a interposed between them. This creates a gap between the lower frame covering material 823 and the attachment 822 that corresponds to the thickness of the double-sided adhesive tapes 823a. This gap constitutes a ventilation channel. This prevents the lower frame covering material 823 from coming into contact with condensation water generated on the attachment 822 and getting wet, and also promotes drying through ventilation.

[0234] As shown in Figure 26, resin frame members 832 and 842 are provided at the ends of the indoor side X2 of the vertical frame bodies 831 and 841, which are made of extruded metal profiles such as aluminum, for the vertical frames 83 and 84. The handle 85 is attached to the resin frame member 842 of the vertical frame 84. When the shoji screen 8 is closed, the resin frame members 832 and 842 are covered from the indoor side X2 by protruding pieces 732b and 742b that protrude inward from the ends of the outdoor side X1 of the cover members 732 and 742 provided on the vertical frames 73 and 74.

[0235] Figures 31 to 37 show joinery according to yet another embodiment. This joinery consists of a fixed window 1B installed in a rectangular opening 110 of the building frame 100. The fixed window 1B is constructed by housing a facing material G on the inner circumference of a frame 9 installed in the opening 110. The facing material G consists of triple glass having three panes of glass Ga, Ga, Ga, laminated with spacers Gb extending along all four edges. However, the facing material G is not limited to triple glass, and may consist of single-pane glass or double-pane glass. The facing material G may consist of four or more panes of glass. The facing material G may consist of a panel that does not transmit light.

[0236] The frame 9 is constructed by framing an upper frame 91, a lower frame 92, and a pair of left and right vertical frames 93, 94 in a rectangular shape around all four sides. On the indoor side X2 of the frame 9, frame members 130 (upper frame member 131, lower frame member 132, and vertical frame members 133, 134) are attached around all four sides, top, bottom, left, and right. Exterior material 120 is provided on the outdoor side X1 of the building structure 100, and interior material 140 is provided on the indoor side X2.

[0237] As shown in Figure 32, the upper frame 91 consists of an outdoor upper frame member 911 and an indoor upper frame member 912, both made of extruded metal profiles such as aluminum, connected by a bridge member 913 made of resin or other heat-insulating material. A cover member 914 is attached to the inner circumference of the upper frame 91, extending from the indoor X2 end of the outdoor upper frame member 911 to the indoor upper frame member 912. The cover member 914 is made of resin, but may be made of metal such as aluminum. The cover member 914 is formed to be elongated along the extension direction of the upper frame 91. An angle portion 914a extending toward the indoor X2 is integrally formed at the indoor X2 end of the cover member 914. The angle portion 914a is positioned flush with the inner circumference 131a of the upper frame member 131, which is located on the indoor X2 side of the upper frame 91.

[0238] An upper frame covering material 916 is provided on the inner circumference of the cover member 914 via an attachment 915. The attachment 915 is made of resin, but may be made of metal such as aluminum. The attachment 915 is formed to be elongated along the extending direction of the upper frame 91. As shown in Figure 34, the attachment 915 is detachably attached to the inner circumference of the cover member 914 by a pair of engaging pieces 915a, 915a that extend toward the outer circumference.

[0239] The upper frame covering material 916 is a non-metallic decorative material that improves the aesthetic appearance of the fixed window 1B when viewed from the interior side X2. In this embodiment, the same type of wood used as the frame covering material for the sliding window 1 described above is used. The upper frame covering material 916 is formed in a long length along the extension direction of the upper frame 91. As shown in Figure 34, the upper frame covering material 916 is provided between the interior side X2 of the surface material G and the angle portion 914a. The upper frame covering material 916 is positioned to protrude inward from the angle portion 914a.

[0240] In the upper frame 91, the outdoor-facing surface X1 of the facing material G is supported by the outdoor-facing surface support portion 911a extending inward from the outdoor-facing upper frame member 911, as shown in Figure 32, and the indoor-facing surface X2 of the facing material G is supported by the attachment 915, as shown in Figure 34.

[0241] The upper frame covering material 916 is fixed to the attachment 915 by screws 917 driven in from the outdoor side X1 of the attachment 915, with multiple double-sided adhesive tapes 916a interposed between the upper frame covering material 916 and the attachment 915. This creates a gap between the upper frame covering material 916 and the attachment 915 that corresponds to the thickness of the double-sided adhesive tapes 916a. This gap constitutes a ventilation channel. This prevents the upper frame covering material 916 from coming into contact with condensation water generated on the attachment 915 and getting wet, and also promotes drying through ventilation.

[0242] As shown in Figure 32, the lower frame 92 consists of an outdoor lower frame member 921 and an indoor lower frame member 922, both made of extruded metal profiles such as aluminum, connected by a bridge member 923 made of resin or other heat-insulating material. A cover member 924 is attached to the inner circumference of the lower frame 92, extending from the indoor X2 end of the indoor lower frame member 921 to the indoor lower frame member 922. The cover member 924 is made of resin, but may be made of metal such as aluminum. The cover member 924 is formed to be elongated along the extension direction of the lower frame 92. An angle portion 924a extending toward the indoor X2 is integrally formed at the indoor X2 end of the cover member 924. The angle portion 924a is positioned flush with the inner circumference 132a of the lower frame member 132, which is located on the indoor X2 of the lower frame 92.

[0243] A lower frame covering material 925 is provided on the inner circumference of the cover member 924. The cover member 924 also serves as an attachment for mounting the lower frame covering material 925. The lower frame covering material 925 is a decorative material that improves the aesthetic appearance of the fixed window 1B when viewed from the interior side X2, and in this embodiment, the same type of wood used as the upper frame covering material 916 used for the upper frame 91 is used.

[0244] The lower frame covering material 925 is a non-metallic decorative material that improves the aesthetic appearance of FIX1B when viewed from the indoor side X2. In this embodiment, the same wood as the upper frame covering material 716 provided on the upper frame 71 is used to ensure design uniformity. The lower frame covering material 925 extends along the entire length of the lower frame 92 in the extension direction. As shown in Figure 35, the lower frame covering material 925 is provided between the indoor side X2 of the surface material G and the angle portion 924a. The inner surface of the lower frame covering material 925 is arranged to be substantially flush with the inner surface of the angle portion 924a.

[0245] In the lower frame 92, the outdoor-facing surface X1 of the facing material G is supported by the outdoor-facing surface support portion 921a extending inward from the outdoor-facing lower frame member 921, as shown in Figure 32, and the indoor-facing surface X2 of the facing material G is supported by the cover member 924, as shown in Figure 35.

[0246] The lower frame covering material 925 is fixed to the cover member 924 by screws 926 driven in from the outdoor side X1 of the cover member 924, with double-sided adhesive tape 925a interposed between them. This creates a gap between the lower frame covering material 925 and the cover member 924 that corresponds to the thickness of the double-sided adhesive tape 925a. This gap constitutes a ventilation channel. This prevents the lower frame covering material 925 from coming into contact with condensation water generated on the cover member 924 and getting wet, and also promotes drying through ventilation.

[0247] As shown in Figure 33, the vertical frames 93 and 94 are made of extruded metal profiles such as aluminum and have flat vertical frame bodies 931 and 941 that extend in the depth direction. Cover members 932 and 942 are attached to the ends of the vertical frame bodies 931 and 941 on the indoor side X2. The cover members 932 and 942 are made of resin, but may be made of metal such as aluminum. The cover members 932 and 942 are formed to be elongated along the extension direction of the vertical frames 93 and 94. Angle portions 932a and 942a are integrally formed at the ends of the cover members 932 and 942 on the indoor side X2, extending toward the indoor side X2. The angle portions 932a and 942a are arranged flush with the inner circumferential surfaces 133a and 134a of the vertical frame members 133 and 134 which are arranged on the indoor side X2 of the vertical frames 93 and 94.

[0248] Vertical frame covering members 934 and 944 are provided on the inner circumference of the cover members 932 and 942 via attachments 933 and 934. The attachments 933 and 934 are made of resin, but may be made of metal such as aluminum. The attachments 933 and 934 are formed to be elongated along the extension direction of the vertical frames 93 and 94. As shown in Figures 36 and 37, the attachments 933 and 934 are detachably attached to the inner circumference of the attachments 933 and 934 by a pair of engaging pieces 933a, 933a, 943a, 943a that extend toward the outer circumference.

[0249] In the vertical frames 93 and 94, the outdoor-facing surface X1 of the facing material G is supported by the outdoor-facing surface support portions 931a and 941a extending inward from the vertical frame bodies 931 and 941, as shown in Figure 33, while the indoor-facing surface X2 of the facing material G is supported by the attachments 933 and 934, as shown in Figures 36 and 37.

[0250] The vertical frame covering materials 934 and 944 are non-metallic decorative materials that improve the aesthetic appearance of the fixed window 1B when viewed from the interior side X2. In this embodiment, the same wood as the upper frame covering material 916 provided on the upper frame 91 is used to ensure design uniformity. The vertical frame covering materials 934 and 944 are formed in elongated lengths along the extension direction of the vertical frames 93 and 94. As shown in Figures 36 and 37, the vertical frame covering materials 934 and 944 are provided between the interior side X2 of the surface material G and the angle portions 932a and 942a. The vertical frame covering materials 934 and 944 protrude inward from the angle portions 932a and 942a.

[0251] The vertical frame covering materials 934, 944 are fixed to the attachments 933, 943 by screws 935, 945 driven in from the outdoor side X1 of the attachments 933, 943, with multiple double-sided adhesive tapes 934a, 944a interposed between them. This creates a gap between the vertical frame covering materials 934, 944 and the attachments 933, 943 that corresponds to the thickness of the double-sided adhesive tapes 934a, 944a. This gap constitutes a ventilation channel. This allows condensation water generated on the attachments 933, 943 to flow down and be drained, prevents the vertical frame covering materials 934, 944 from coming into contact with the attachments 933, 943 and getting wet, and also promotes drying through ventilation.

[0252] The double-sided adhesive tapes 716a, 726a, 734a, 744a, 813a, 823a, 916a, 925a, 934a, and 944a used in the casement window 1A and fixed window 1B may be formed in elongated lengths and arranged along the entire length in the extension direction of each frame or stile, or they may be formed in short lengths and arranged in fragments at intervals along the extension direction of each frame or stile. Furthermore, when each covering material is fixed with screws, the material is not necessarily limited to double-sided adhesive tapes, and as gap-forming members, for example, elastic members made of rubber, resin, etc., in the form of tape or sheets may be used.

[0253] The sliding window 1, which is a fixture of this embodiment, provides the following effects.

[0254] The joinery of this embodiment is a sliding window 1 comprising a frame 2 and inner sashes 3, 4 and outer sashes 5, 6 arranged on the inner circumference side of the frame 2, wherein the frame bodies 30, 40 of the inner sashes 3, 4 have attachments 332, 445 which are constituent members of the frame bodies 30, 40, and a first covering material, an outer covering material 3331, an inner covering material 3332, 4461 and a second covering material, an interior covering material 3333, 4462, arranged on the outer periphery side wall portion 3322 and the inner periphery side wall portion 3323, 4452 which are the outer surfaces of the attachments 332, 445, and one of the outer covering material 3331 and the inner covering material 3332, 4461 One end and the ends of the indoor covering materials 3333 and 4462 are positioned opposite each other. Attachments 332 and 445 have outer covering material engaging portions 3322b and inner covering material engaging portions 3323b and 4452b that engage with the other end of the outer covering material 3331 and inner covering material 3332 and 4461, respectively. The outer covering material 3331 and inner covering material 3332 and 4461 are engaged via elastic materials 334, 335, and 447 at the outer covering material engaging portions 3322b and 3323b and 4452b, respectively, and the indoor covering material 3333 and 4462 are fixed to attachments 332 and 445.

[0255] According to this configuration, the outer peripheral side covering material 3331 and the inner peripheral side covering materials 3332, 4461, which are the first covering materials, can be stretched and fixed by the outer peripheral side covering material engaging portions 3322b, the inner peripheral side covering material engaging portions 3323b, 4452b, and the elastic members 334, 335, 447, so that they can be easily attached without using a fixing member. Therefore, a plurality of covering materials can be easily attached to the frame bodies 30, 40 of the inner shoji 3, 4.

[0256] In the present embodiment, the attachments 332, 445 have protruding pieces 3322c, 3323c, 4452c that abut against one end of the outer peripheral side covering material 3331 and the inner peripheral side covering materials 3332, 4461.

[0257] According to this configuration, when the outer peripheral side covering material 3331 and the inner peripheral side covering materials 3332, 4461 are attached to the attachments 332, 445, the outer peripheral side covering material 3331 and the inner peripheral side covering materials 3332, 4461 can be temporarily fixed between the outer peripheral side covering material engaging portions 3322b, the inner peripheral side covering material engaging portions 3323b, 4452b, and the protruding pieces 3322c, 3323c, 4452c.

[0258] In the present embodiment, the opposing surfaces 3331b, 3332b, 4461b at one end of the outer peripheral side covering material 3331 and the inner peripheral side covering materials 3332, 4461 are inserted between the opposing surfaces 3333d, 3333f, 4462c at the end of the indoor side covering materials 3333, 4462, and the outer peripheral side wall portions 3322 and the inner peripheral side wall portions 3323, 4452 of the attachments 332, 445.

[0259] According to this configuration, it is possible to prevent the outer peripheral side covering material 3331 and the inner peripheral side covering materials 3332, 4461 from coming off in the direction away from the attachments 332, 445.

[0260] In the present embodiment, the elastic members 334, 335, 447 include first elastic members 3341, 3351, 4471 that urge the outer peripheral side covering material 3331 and the inner peripheral side covering materials 3332, 4461 in the direction of bringing them into abutment with the protruding pieces 3322c, 3323c, 4452c.

[0261] According to this, the other end of the outer peripheral covering material 3331 and the inner peripheral covering materials 3332 and 4461 can be easily positioned, and the temporary fixing of the outer peripheral covering material 3331 and the inner peripheral covering materials 3332 and 4461 to the protruding pieces 3322c, 3323c, and 4452c can be made more reliable.

[0262] In this embodiment, the elastic materials 334, 335, and 447 each have a second elastic material 3342, 3352, and 4472 that biases the other ends of the outer peripheral covering material 3331 and the inner peripheral covering material 3332 and 4461 in a direction that engages with the outer peripheral covering material engaging portion 3322b and the inner peripheral covering material engaging portions 3323b and 4452b of the attachment 332 and 445.

[0263] This prevents looseness at the other end of the outer peripheral covering material 3331 and the inner peripheral covering materials 3332 and 4461, and allows for more reliable temporary fixing of the outer peripheral covering material 3331 and the inner peripheral covering materials 3332 and 4461 to the outer peripheral covering material engagement portion 3322b and the inner peripheral covering material engagement portions 3323b and 4452b.

[0264] In this embodiment, the opposing surfaces 3331b, 3332b, 4461b of the outer peripheral covering material 3331 and the inner peripheral covering materials 3332, 4461, and the opposing surfaces 3333d, 3333f, 4462c of the indoor covering materials 3333, 4462 are inclined surfaces.

[0265] According to this, there is no need to perform complex processing to combine and engage the outer peripheral covering material 3331, the inner peripheral covering materials 3332, 4461 and the indoor covering materials 3333, 4462 with each other, and there is no risk of them becoming unable to butt together due to misalignment of surfaces caused by manufacturing errors, etc. Furthermore, even if dimensional misalignment occurs between opposing surfaces 3331b, 3332b, 4461b and opposing surfaces 3333d, 3333f, 4462c due to shrinkage of the outer peripheral covering material 3331, the inner peripheral covering materials 3332, 4461 and the indoor covering materials 3333, 4462, there is no risk of the internal attachments 322, 445 being visible through the gap between them.

[0266] In this embodiment, the opposing surfaces 3333d, 3333f, and 4462c of the indoor covering material 3333 and 4462 have notches 3333e, 3333g, and 4462d at their tips.

[0267] According to this, it is possible to prevent damage to the leading edges of the opposing surfaces 3333d, 3333f, and 4462c when they collide with something during installation of the interior covering materials 3333 and 4462 or when setting up the interior sliding doors 3 and 4, or due to deterioration from long-term use. Therefore, the good aesthetic appearance of the frame covering material can be maintained over a long period of time.

[0268] In this embodiment, the attachments 322 and 445 have protrusions 332b and 445b that project toward the surface facing at least one of the outer peripheral covering material 3331, the inner peripheral covering material 3332 and 4461, or the indoor covering material 3333 and 4462.

[0269] According to this, a gap equal to the protruding height of the protrusions 332b and 445b is formed between the outer peripheral covering material 3331, the inner peripheral covering materials 3332 and 4461 and the attachments 322 and 445, thereby forming a ventilation channel between the outer peripheral covering material 3331, the inner peripheral covering materials 3332 and 4461 and the attachments 322 and 445. As a result, even if condensation occurs on the visible surface of the attachments 322 and 445, it can be drained, and it is possible to prevent the outer peripheral covering material 3331 and the inner peripheral covering material 3332 and 4461 from coming into contact with the condensation and getting wet, and furthermore, drying can be promoted by ventilation.

[0270] In this embodiment, the outer peripheral covering material 3331, the inner peripheral covering materials 3332, 4461, and the indoor covering materials 3333, 4462 are made of wood.

[0271] According to this, it is possible to construct a highly aesthetically pleasing sliding window 1 with a wood-like texture.

[0272] This disclosure is not limited to the embodiments described above and can be modified as appropriate. For example, the first and second covering materials are not limited to wood, but may be made of non-metallic materials such as ceramic plates, tiles, glass, or resin plates.

[0273] The joinery of this disclosure may be such that the first covering material and the second covering material are provided on the frame, or the first covering material and the second covering material are provided on both the frame and the sliding door.

[0274] The joinery disclosed herein is not limited to a sliding window 1 having four sashes: inner sashes 3 and 4 and outer sashes 5 and 6. The joinery disclosed herein is also applicable to sliding windows, casement windows 1A, and fixed windows 1B having the two sashes described above, and furthermore, the joinery may be a single-sliding window, a double-hung window, etc. The joinery disclosed herein is not limited to residential sashes, but may also be building sashes, non-residential sashes, etc.

[0275] This disclosure includes joinery as described in the following embodiments.

[0276] <Aspect 1> A joinery comprising a frame and a sliding screen positioned on the inner circumference side of the frame, At least one of the frame or the sliding door frame comprises a component that constitutes the frame or the frame, and a first covering material and a second covering material disposed on the outer surface of the component. One end of the first covering material and the end of the second covering material are arranged facing each other. The aforementioned component has an engaging portion that engages with the other end of the first covering material, The first covering material is engaged at the engagement portion via an elastic material, The second covering material is a joinery that is fixed to the component.

[0277] <Aspect 2> The joinery according to embodiment 1, wherein the component has a protruding piece that abuts against one end of the first covering material.

[0278] <Aspect 3> The fitting according to Aspect 2, wherein the facing surface of the one end portion of the first covering member is inserted between the facing surface of the end portion of the second covering member and the outer surface of the constituent member.

[0279] <Aspect 4> The fitting according to Aspect 3, wherein the elastic member includes a first elastic member that biases the first covering member in a direction to bring the first covering member into contact with the protruding piece.

[0280] <Aspect 5> The fitting according to Aspect 4, wherein the elastic member includes a second elastic member that biases the other end portion of the first covering member in a direction to engage the other end portion with the engaging portion of the constituent member.

[0281] <Aspect 6> The fitting according to any one of Aspects 3 to 5, wherein the facing surface of the first covering member and the facing surface of the second covering member are each inclined surfaces.

[0282] <Aspect 7> The fitting according to Aspect 6, wherein a notch portion is provided at a tip end of the facing surface of the second covering member.

[0283] <Aspect 8> The fitting according to any one of Aspects 1 to 7, wherein the constituent member has a protruding portion that protrudes toward a surface facing at least one of the first covering member and the second covering member.

[0284] <Aspect 9> The fitting according to any one of Aspects 1 to 8, wherein the first covering member and the second covering member are made of wood.

Description of Reference Signs

[0285] 1 Sliding window (joinery), 2 Frame, 3,4 Inner sash, 5,6 Outer sash, 30,40,50,60 Frame, 322,445 Attachment (component), 332b,445b Protrusion, 3322b Outer periphery side covering material engagement part, 3322c,3323c,4452c Projecting piece, 3323b,4452b Inner periphery side covering material engagement part, 3331 Outer periphery side covering material (first covering material), 3332,4461 Inner periphery side covering material (first covering material), 3333,4462 Indoor side covering material (second covering material), 3331b,3332b,4461b,3333d,3333f,4462c Opposing surfaces 3341, 3351, 4471 First elastic material, 3342, 3352, 4472 Second elastic material, 3333e, 3333g, 4462d Notch, 3334, 4463 Groove

Claims

1. A joinery comprising a frame and a sliding screen positioned on the inner circumference side of the frame, At least one of the frame or the sliding door frame comprises a component that constitutes the frame or the frame, and a first covering material and a second covering material disposed on the outer surface of the component. One end of the first covering material and the end of the second covering material are arranged facing each other. The aforementioned component has an engaging portion that engages with the other end of the first covering material, The first covering material is engaged at the engagement portion via an elastic material, The second covering material is a joinery that is fixed to the component.

2. The joinery according to claim 1, wherein the component has a protruding piece that abuts against one end of the first covering material.

3. The joinery according to claim 2, wherein the opposing surface of one end of the first covering material is inserted between the opposing surface of the end of the second covering material and the outer surface of the component.

4. The joinery according to claim 3, wherein the elastic material has a first elastic material that biases the first covering material in a direction that brings it into contact with the protruding piece.

5. The joinery according to claim 4, wherein the elastic material has a second elastic material that biases the other end of the first covering material in a direction that engages with the engaging portion of the component.

6. The joinery according to any one of claims 3 to 5, wherein the opposing surface of the first covering material and the opposing surface of the second covering material are inclined surfaces.

7. The joinery according to claim 6, wherein the second covering material has a notch at the tip of the opposing surface.

8. The joinery according to any one of claims 1 to 5, wherein the component has a projection that protrudes toward a surface facing at least one of the first covering material or the second covering material.

9. The joinery according to any one of claims 1 to 5, wherein the first covering material and the second covering material are made of wood.

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