Doors and windows and functional parts

Abstract

To provide a joinery piece that allows for easy addition of functionality later on, without having to change the end cap. [Solution] A door and window fitting comprising a frame having an upper frame, a lower frame, and a pair of left and right vertical frames, and a sliding door disposed on the inner circumference of the frame, wherein the sliding door has an upper frame, a lower frame, and a pair of left and right vertical frames, and end caps are disposed on at least one of the upper end and lower end of the vertical frames of the sliding door, and the end caps have a wall portion that is exposed on the interior side and at least one of the upper or lower sides, and the wall portion has at least one component mounting portion to which a functional component can be attached.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a fitting and a functional component.

BACKGROUND ART

[0002] An end cap such as an anti-rattle component is attached to an end portion of a vertical frame of a shoji accommodated in a fitting. The end cap also functions as a component that receives condensed water or the like generated on the vertical frame (for example, refer to Patent Document 1).

PRIOR ART DOCUMENTS

PATENT DOCUMENTS

[0003]

PATENT DOCUMENT 1

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0004] In general, since the end cap is attached so as to cover the upper and lower end portions of the vertical frame, it is easily visible from the indoor side. Therefore, it is conceivable to improve the design by accommodating the end cap inside the vertical frame so that the end cap is not visible from the indoor side. However, for example, when the fitting is installed in a place where condensed water or the like is likely to be generated on the vertical frame, the condensed water or the like cannot be received by the end cap, and the condensed water or the like may drip toward the indoor side. In such a case, since it is not easy to modify the end cap later, there is room for improvement.

[0005] Accordingly, an object of the present disclosure is to provide a fitting and a functional component that allow functions to be easily added later without modifying the end cap.

MEANS FOR SOLVING THE PROBLEMS

[0006] This disclosure relates to a joinery comprising a frame having an upper frame, a lower frame, and a pair of left and right vertical frames, and a sliding screen disposed on the inner circumference of the frame, wherein the sliding screen has an upper stile, a lower stile, and a pair of left and right vertical stiles, and end caps are disposed on at least one of the upper and lower ends of the vertical stiles of the sliding screen, and the end caps have wall portions that are exposed on at least one of the interior side and above or below, and the wall portions have at least one component mounting portion to which functional components can be attached.

[0007] This disclosure relates to a functional component configured to be attachable to the wall portion of the end cap of the building fitting. [Brief explanation of the drawing]

[0008] [Figure 1] This is a front view of the door / window of this embodiment, as seen from the outside. [Figure 2] This is a front view of the door / window of this embodiment, as seen from the interior side. [Figure 3] This is a vertical cross-sectional view of the joinery of this embodiment. [Figure 4] This is a cross-sectional view of one of the vertical frames of the door / window fitting in this embodiment. [Figure 5] This is a cross-sectional view of the other vertical frame side of the joinery in this embodiment. [Figure 6] This is a cross-sectional view of one of the meeting stiles of the door and window fittings of this embodiment. [Figure 7] This is a cross-sectional view of the butt joint of the door and window fittings 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] This is an enlarged cross-sectional view showing the left side portion of the meeting inner stile shown in Figure 6. [Figure 14] This is an enlarged cross-sectional view showing the right side portion of the meeting stile shown in Figure 6. [Figure 15] This is a cross-sectional view showing a part of the structure of the butt stile shown in Figure 7 in an exploded manner. [Figure 16] This is an enlarged cross-sectional view showing the right side portion of the butt stile shown in Figure 15. [Figure 17] This is a vertical cross-sectional view showing a part of the structure of the door leading stile of the outer sash shown in Figure 4 in an exploded manner. [Figure 18] This is an exploded perspective view showing the upper end portion of one meeting inner stile of the fitting of the present embodiment. [Figure 19] This is a perspective view showing the lower end portion of one meeting inner stile of the fitting of the present embodiment. [Figure 20] This is an exploded perspective view showing the lower end portion of the meeting inner stile shown in Figure 19. [Figure 21] This is a perspective view of the end cap in Figure 20. [Figure 22] This is a plan view of the end cap in Figure 20. [Figure 23] This is a perspective view of the water receiving component. [Figure 24] This is a cross-sectional view taken along line A-A in Figure 2. [Figure 25] This is an exploded perspective view showing the upper end portion of one meeting inner stile of the fitting of the present embodiment. [Figure 26] This is a perspective view showing the lower end portion of one butt stile of the fitting of the present embodiment. [Figure 27] This is an exploded perspective view showing the lower end portion of the butt stile shown in Figure 26. [Figure 28] This is a perspective view of the end cap in Figure 27. [Figure 29] This is a plan view of the end cap in Figure 27. [Figure 30] This is a cross-sectional view taken along line B-B in Figure 2. [Figure 31] This is a perspective view of the gap adjusting component. [Figure 32]This is a front view of the vertical frame with gap adjustment parts attached, as seen from the outside. [Figure 33] This is a perspective view of the upper part of the butt joint of the door and window in this embodiment, as seen from the outside. [Figure 34] This is a perspective view of the lower part of the butt joint of the door and window in this embodiment, as seen from the outside. [Modes for carrying out the invention]

[0009] The embodiments of this disclosure will be described in detail below with reference to the drawings.

[0010] <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.

[0011] 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.

[0012] 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.

[0013] <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.

[0014] [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.

[0015] 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.

[0016] 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.

[0017] 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 216 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).

[0018] [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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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).

[0023] [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.

[0024] 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.

[0025] 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).

[0026] 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 236b that protrude outward from the inner plate portions 236a and 246a and abut against the inner circumferential surfaces 231b and 231b 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.

[0027] 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.

[0028] 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 246a, 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 247c 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 prevents the vertical frame covering material 237, 247 from coming into contact with the condensation and getting wet, even if condensation occurs on the inner panel portion 236a, 246a, and also promotes drying through ventilation. Multiple double-sided adhesive tapes 237a, 237a, 247a, 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 fragmentarily at intervals along the extension direction of the vertical frames 23, 24.

[0029] 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.

[0030] 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.

[0031] <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.

[0032] [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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] [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, a resin attachment 1200, and an upper frame covering material 1300.

[0038] (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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] (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 extension 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] (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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] [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.

[0055] (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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] (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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] (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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] [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.

[0072] 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.

[0073] (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.

[0074] 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.

[0075] 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.

[0076] (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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] (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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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 prevents the outer circumference portion 3333b or inner circumference portion 3333c of the indoor covering material 3333 from coming into surface contact with the outer circumference side wall portion 3322 or inner circumference side wall portion 3323 of the attachment 332 when the indoor covering material 3333 is attached 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, by contacting the projections 332c. Therefore, a ventilation passage can be secured between the two.

[0110] 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 333 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 or double-sided adhesive tape. As a result, even if the covering material is divided into multiple parts, it can be easily installed with a small number of parts.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] [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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] [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.

[0123] (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 in a flat plate shape that extends 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] (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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] (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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] (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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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 an airflow channel between the indoor covering material 4462 and the indoor wall portion 4452 of the attachment 445. Moreover, this airflow channel is blocked by the projection 445c at the outer periphery of the indoor covering material 4462. Therefore, the airflow channel becomes less visible, 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, preventing the inner circumferential side portion 4462b of the indoor covering material 4462 from making surface contact with the inner circumferential side wall portion 4452 of the attachment 445. This ensures that a ventilation passage is maintained between the two.

[0160] 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 always necessary to fix the inner circumferential covering material 4461 to the attachment 445 using screws or double-sided adhesive tape. For this reason, even if the covering material is divided into multiple parts, it can be easily installed with a small number of parts.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] [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.

[0165] 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.

[0166] 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.

[0167] 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.

[0168] [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.

[0169] (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 inside by these sections. The exterior wall sections 5411, 6411 have a shape that is partially recessed toward the interior side 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 side X1.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] (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.

[0174] 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.

[0175] 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.

[0176] 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.

[0177] 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.

[0178] (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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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.

[0183] <End caps> Next, we will describe the end caps provided at the upper and lower ends of the meeting stiles 33, 43 and the butt stiles 34, 44 of the inner sliding doors 3, 4.

[0184] [Cap for the upper end of the inner frame of the meeting stile] Figure 18 shows the upper end cap 700 provided on the upper end of the meeting stile inner frame 33 of the inner sliding door 3. The upper end cap provided on the upper end of the meeting stile inner frame 43 of the inner sliding door 4 has the same structure as the upper end cap 700 provided on the meeting stile inner frame 33 of the inner sliding door 3, and is arranged symmetrically to Figure 18. Therefore, the explanation of the upper end cap of the meeting stile inner frame 43 of the inner sliding door 4 corresponding to Figure 18 will be based on the following explanation, and the illustration will be omitted.

[0185] The upper end cap 700 also functions as an upper sway stopper component to suppress swaying of the upper end of the inner sash 3. The upper end cap 700 is inserted and attached to the upper end of the meeting stile inner frame 33. The upper end cap 700 has an upper end cap body 701, an end plate portion 702, an exterior facing wall portion 703, an interior facing wall portion 704, and an upper end sealing wall portion 705.

[0186] The upper end cap body 701 has a planar shape that corresponds to the planar shape of the hollow portion S33a of the meeting stile inner frame body 331 in the meeting stile inner frame 33. The upper end cap body 701 is formed in a thin, flat shape with a small thickness in the vertical direction. The upper end cap body 701 is positioned on the upper end of the meeting stile inner frame 33 by contacting and covering it from above.

[0187] The upper end cap body 701 has a groove 7011 that opens to the upper surface 701a. The groove 7011 is U-shaped in cross-section, extends in the left-right direction of the inner sash 3 along the extension direction of the upper frame 31, and penetrates the upper end cap body 701 in the left-right direction. The groove 7011 engages with the upper rail 21b on the indoor side of the upper frame 21 when the inner sash 3 is housed in the frame 2. Multiple locking plates 7012 protrude downward from the lower surface of the upper end cap body 701.

[0188] The end plate portion 702 has a semicircular lower end and extends downward along the depth direction of the groove portion 7011 from the end of the upper end cap body 701 that is exposed to the visible surface 33a of the meeting stile inner frame 33. The groove portion 7011 penetrates the end plate portion 702 and opens to the visible surface 33a of the meeting stile inner frame 33. The end plate portion 702 has one opening 7021 below the groove portion 7011. The opening 7021 is a hole through which a screw SC11 for fixing the upper end cap 700 to the upper frame 31 is inserted. The screw SC11 is a fastener that fixes the vertical and horizontal frames together. The screw SC11 is inserted through the opening 7021 and screwed into a tapping hole 1141 formed in the upper frame body 1100. A cover cap 702a is attached to the opening 7021.

[0189] The exterior visible wall portion 703 extends downward from the exterior end X1 of the upper end cap body 701. The interior visible wall portion 704 extends downward from the interior end X2 of the upper end cap body 701. The interior visible wall portion 704 is exposed at the upper end of the meeting stile frame 33 and forms the interior X2 visible surface of the upper end cap 700. The width of the interior visible wall portion 704 in the left-right direction corresponds to the width of the meeting stile frame body 331 of the meeting stile frame 33 in the left-right direction. The end portion 701b of the upper end cap body 701 that is located on the vertical frame 23 side, that is, the end portion 701b that is located on the visible surface 33b side of the meeting stile frame 33, protrudes further toward the vertical frame 23 (left side in Figure 18) than the interior visible wall portion 704.

[0190] The upper sealing wall portion 705 is made of a rectangular flat plate, protruding from the lower end of the interior facing wall portion 704 toward the interior side X2, and is positioned facing upward. The external shape of the upper sealing wall portion 705 corresponds to the plan view shape of the hollow portion S33b on the interior side X2 of the meeting stile interior frame body 331.

[0191] As shown in Figure 18, the upper end cap 700 is attached to the upper end of the meeting stile inner frame 33 by inserting the locking plate 7012 into the inside of the meeting stile inner frame body 331 from above the meeting stile inner frame 333. The end plate portion 702 is housed in the outer peripheral covering material 3331 facing the visible surface 33b of the meeting stile inner frame 33 and in the U-shaped notches 3331g and 331a formed in the meeting stile inner frame body 331, respectively, and is exposed to the visible surface 33b of the meeting stile inner frame 33. The upper end cap 700 is fixed to the upper frame 31 by a screw SC11 that passes through the opening 7021 of the end plate portion 702.

[0192] In this embodiment, the upper end extensions 3331h, 3331h of the outer peripheral covering material 3331, which is provided on the visible surface 33b of the meeting stile inner frame 33 and arranged so as to sandwich the end plate portion 702 between them, extend to approximately the same position as the upper end of the meeting stile frame body 331. The upper end cap body 701 abuts against the upper end surfaces 3331h1, 3331h1 of the meeting stile inner frame body 331 and the upper end extensions 3331h, 3331h, and is arranged to cover the upper end surfaces 3331h1, 3331h1. The indoor side visible wall portion 704 is arranged flush with the indoor side visible surface 3331h2 of the upper end extension 3331h of the pair of upper end extensions 3331h, 3331h, specifically the indoor side X2 upper end extension 3331h.

[0193] The upper sealing wall portion 705 fits inside the meeting stile inner frame covering material 333 of the meeting stile inner frame 33. The portion of the meeting stile inner frame body 331 on the indoor side X2 from the partition wall portion 3316 is positioned below the upper end surface 333a of the meeting stile inner frame covering material 333, at a distance greater than the thickness of the upper sealing wall portion 705. Therefore, the upper sealing plate portion 705 is positioned flush with the upper end surface 333a of the meeting stile inner frame covering material 333, sealing the hollow portion S33b of the meeting stile frame body 331 and preventing dust and other debris from entering from above. The upper sealing wall portion 705 is positioned to protrude on the indoor side X2 from the surface material G of the inner sash 3 and the visible surface 31a on the indoor side X2 of the upper frame 31.

[0194] The upper end cap 700 is installed such that, except for the upper end cap body 701, end plate portion 702, outdoor-facing wall portion 703, indoor-facing wall portion 704, and upper end sealing wall portion 705 which are exposed on the outer surface of the meeting stile inner frame 33, the majority of it is hidden inside the upper end of the meeting stile inner frame 33. The upper end cap body 701, which covers the hollow portion S33a on the outdoor side X1 of the meeting stile inner frame body 331, is a thin, flat plate and is positioned flush with the visible surface 33b of the meeting stile inner frame 33 on the outer periphery side of the upper end extension portion 3331h, 3331h. Therefore, the upper end cap 700 does not protrude toward the vertical frame 23 side beyond the visible surface 33b of the meeting stile inner frame 33.

[0195] [Bottom end cap for the inner frame of the meeting stile] Figures 19 to 24 show the lower end cap 710 provided on the lower end of the meeting stile inner frame 33 of the inner sliding door 3. The lower end cap provided on the upper end of the meeting stile inner frame 43 of the inner sliding door 4 has the same structure as the lower end cap 710 provided on the meeting stile inner frame 33 of the inner sliding door 3, and is arranged symmetrically to Figures 19 to 24. Therefore, the explanation of the lower end cap of the meeting stile inner frame 43 of the inner sliding door 4 corresponding to Figures 19 to 24 will be based on the following explanation, and the illustration will be omitted.

[0196] The lower end cap 710 also functions as a lower sway stopper component to suppress swaying of the lower end of the inner sash 3. The lower end cap 710 is inserted and attached to the lower end of the meeting stile inner frame 33. The lower end cap 710 has a lower end cap body 711, an end plate portion 712, an exterior facing wall portion 713, an interior facing wall portion 714, and a lower end sealing wall portion 715.

[0197] The lower end cap body 711, like the upper end cap body 701 of the upper end cap 700, has a planar shape that corresponds to the planar shape of the hollow portion S33a of the meeting stile inner frame body 331 in the meeting stile inner frame 33, and is formed as a thin, flat plate with a small thickness in the vertical direction. The upper end cap body 711 is positioned at the lower end of the meeting stile inner frame 33 by contacting and covering the meeting stile inner frame 22 from below, as shown in Figure 19.

[0198] The lower end cap body 711 has a groove 7111 that opens to the lower surface 711a. The groove 7111 is formed in a downward U-shape in cross-section, extends in the left-right direction of the inner sash 3 along the extension direction of the lower frame 32, and penetrates the lower end cap body 711 in the left-right direction. The groove 7111 engages with the indoor lower rail 22b of the lower frame 22 when the inner sash 3 is housed in the frame 2, similar to the upper end cap body 701 of the upper end cap 700. As shown in Figures 21 and 22, a plurality of locking plates 7112 protrude upward from the upper surface of the lower end cap body 711. As shown in Figures 19, 20 and 22, a drain hole 7113 is formed on the lower surface 711a of the lower end cap body 711 to drain condensation water received by the lower end cap body 711 onto the lower frame 22. Multiple drainage holes 7113 are provided on the lower surface 711a, flanking the groove 7111. The drainage holes 7113 are positioned on the outdoor side X1 of the angle portion 226 of the lower frame 22.

[0199] The end plate portion 712 has a semicircular upper end and extends upward along the depth direction of the groove portion 7111 from the end of the lower end cap body 711 which is exposed to the visible surface 33b of the meeting stile inner frame 33. The groove portion 7111 penetrates the end plate portion 712 and opens to the visible surface 33b of the meeting stile inner frame 33. The end plate portion 712 has two openings 7121 and 7122 arranged vertically. The upper opening 7121 is a hole through which a screw SC21 for fixing the meeting stile inner frame 33 to the lower frame 32 is inserted. The screw SC21 is a fastener for fixing the vertical and horizontal frames together. The screw SC21 passes through the screw hole 331b formed at the lower end of the meeting stile inner frame body 331 and is screwed into the tapping hole 2131 formed in the lower frame body 2100 of the lower frame 32. The lower opening 7122 is a hole through which an adjustment tool is inserted when adjusting the roller 2170 provided on the lower frame 32. Covering caps 712a are attached to the two openings 7121 and 7122, respectively.

[0200] The exterior visible wall portion 713 extends upward from the exterior end X1 of the lower end cap body 711. The interior visible wall portion 714 extends upward from the interior end X2 of the lower end cap body 711. The interior visible wall portion 714 is exposed at the lower end of the meeting stile frame 33 and forms the interior X2 visible surface of the lower end cap 710. The width of the interior visible wall portion 714 in the left-right direction corresponds to the width of the meeting stile frame body 331 of the meeting stile frame 33 in the left-right direction. The end portion 711b of the lower end cap body 711 that is located on the vertical frame 23 side, that is, the end portion 711b that is located on the visible surface 33b side of the meeting stile frame 33, protrudes toward the vertical frame 23 (left side in Figures 20 and 22) more than the interior visible wall portion 714, as shown in Figures 20 and 22.

[0201] The lower end sealing wall portion 715 is formed in a rectangular shape in plan view, protruding from the upper end of the interior side facing wall portion 714 toward the interior side X2, and is positioned facing downward. The external shape of the lower end sealing wall portion 715 corresponds to the plan view shape of the hollow portion S33b on the interior side X2 of the meeting stile interior frame body 331 in the meeting stile interior frame 33. The lower end sealing wall portion 715 is formed by an inclined surface that slopes downward from the interior side X2 toward the exterior side X1.

[0202] A rising wall portion 7151 is formed along the outer circumference of the lower end sealing wall portion 715, extending upward from the lower end sealing wall portion 715. As shown in Figures 21 and 22, the outdoor side X1 of the lower end sealing wall portion 715 does not have the rising wall portion 7151 and is open to the inside of the lower end cap body 711.

[0203] As shown in Figures 20 to 22, the lower end sealing wall portion 715 has component mounting holes 716 formed therein, which serve as component mounting portions. The component mounting holes 716 are holes into which functional components such as the water receiving component 900 shown in Figure 19 can be detachably attached, and they penetrate the lower end sealing wall portion 715 vertically. In this embodiment, the lower end sealing wall portion 715 has two rectangular component mounting holes 716, 716 arranged side by side in the left-right direction, but the component mounting holes 716, 716 do not necessarily have to be arranged side by side in the left-right direction. The component mounting holes 716, 716 may be arranged, for example, in the depth direction, or diagonally with respect to the depth direction. The number of component mounting holes 716 is not limited to two, and it is sufficient to have at least one in the lower end sealing wall portion 715. The shape of the component mounting holes 716 is not limited to rectangles, but may be other shapes such as round holes. Details of the functional components will be described later.

[0204] As shown in Figure 20, the lower end cap 710 is attached to the lower end of the meeting stile inner frame 33 by inserting the locking plate 7112 into the inside of the meeting stile inner frame body 331 from below the meeting stile inner frame 33. The end plate portion 712 is housed in U-shaped notches 3331i formed in the outer peripheral covering material 3331 on the visible surface 33b of the meeting stile inner frame 33, and is exposed on the visible surface 33b of the meeting stile inner frame 33. The lower end cap 710 is fixed to the lower frame 32 by screws SC21 that pass through the opening 7121 of the end plate portion 712.

[0205] In this embodiment, the lower end extensions 3331j, 3331j of the outer peripheral covering material 3331, which is provided on the visible surface 33b of the meeting stile inner frame 33 and arranged so as to sandwich the end plate portion 712 between them, extend to approximately the same position as the lower end of the meeting stile body 331. The lower end cap body 711 abuts against the lower end surfaces 3331j1, 3331j1 of the meeting stile inner frame body 331 and the lower end extensions 3331j, 3331j, and is arranged to cover the lower end surfaces 3331j1, 3331j1. The indoor side visible wall portion 714 is arranged flush with the indoor side visible surface 3331j2 of the lower end extension 3331j of the pair of lower end extensions 3331j, 3331j, specifically the indoor side X2 lower end extension 3331j.

[0206] The lower end sealing wall portion 715 and the rising wall portion 7151 are fitted inside the meeting stile inner frame covering material 333 of the meeting stile inner frame 33. The portion of the meeting stile inner frame body 331 on the indoor side X2 of the partition wall portion 3316 is positioned above the lower end surface 333b of the meeting stile inner frame covering material 333 by the height of the rising wall portion 7151 from the lower end sealing wall portion 715. Therefore, the lower end sealing plate portion 715 is positioned flush with the lower end surface 333b of the meeting stile inner frame covering material 333 to seal the hollow portion S33b of the meeting stile frame body 331 and prevent dust and other debris from entering from below. The lower end sealing wall portion 715 is positioned to protrude on the indoor side X2 from the facing surface 32a on the indoor side X2 of the facing material G of the inner sash 3 and the lower frame 32.

[0207] The lower end cap 710 is installed such that, except for the lower end cap body 711, end plate portion 712, outdoor-facing wall portion 713, indoor-facing wall portion 714, and lower end sealing wall portion 715 which are exposed on the outer surface of the meeting stile inner frame 33, the majority of it is hidden inside the lower end of the meeting stile inner frame 33. The lower end cap body 711, which covers the hollow portion S33a on the outdoor side X1 of the meeting stile inner frame body 331, is a thin, flat plate and is positioned flush with the visible surface 33b of the meeting stile inner frame 33 on the outer circumference side of the end extension portions 3331j, 3331j. Therefore, the lower end cap 710 does not protrude toward the vertical frame 23 side beyond the visible surface 33b of the meeting stile inner frame 33.

[0208] The lower end sealing wall portion 715 of the lower end cap 710, which is attached to the lower end of the meeting stile inner frame 33, is positioned inside the meeting stile inner frame covering material 333. For example, when condensation water generated in the hollow portion S33b on the indoor side X2 of the meeting stile inner frame body 331, the ventilation channel Vc1 between the meeting stile inner frame body 331 and the attachment 332, and the ventilation channel Vc2 between the attachment 332 and the meeting stile inner frame covering material 333 flows down, it receives the condensation water. The condensation water received by the lower end sealing wall portion 715 flows to the outdoor side X1 along the slope of the lower end sealing wall portion 715 and is discharged onto the lower frame 22 from the drain hole 7113 of the lower end cap body 711.

[0209] As shown in Figure 21, the two component mounting holes 716, 716 provided in the lower end sealing wall portion 715 each have vertical wall portions 7161, 7161 that project upward independently. The vertical wall portions 7161 are formed in a rectangular tubular shape that project upward along the four sides of the component mounting holes 716. The vertical wall portions 7161 may be in other shapes, such as cylindrical, as long as they can surround the component mounting holes 716. This prevents a large amount of condensation water from flowing down the lower end sealing wall portion 715 from being discharged from the component mounting holes 716, 716, and prevents the interior from getting wet from condensation water discharged from the component mounting holes 716, 716. The lower end sealing wall portion 715 may also be provided with a single vertical wall portion 7161 that surrounds all of the multiple component mounting holes 716.

[0210] (Functional parts) In this disclosure, functional components are different from fixing components such as screws for attaching end caps. They are components that add new functions to end caps by being retrofitted using the component mounting holes of the end caps as needed. The material of the functional components is, for example, resin or metal such as aluminum, and is appropriately selected according to the specific function of the functional component. Specific functional components include water receiving components for receiving condensation, gap adjustment components for reducing the gap between the vertical frame of the shoji screen and the upper or lower frame, and security components such as security sensor components for detecting external forces applied to the shoji screen and open detection sensor components for detecting when the shoji screen has been opened.

[0211] Figures 19 and 20 show the water receiving component 900 as a functional component. The water receiving component 900 is detachably attached by engaging with two component mounting holes 716, 716 in the lower end sealing wall portion 715. As shown in Figure 23, the water receiving component 900 has a water receiving component body 901, a pair of engaging pieces 902, 902, and a vertical wall portion 903.

[0212] As shown in Figure 24, the water receiving component body 901 is formed in a flat plate shape with a size that can cover the lower end surface of the portion of the meeting stile inner frame 33 that protrudes more towards the indoor side X2 than the angle portion 226 of the lower frame 22. Specifically, the water receiving component body 901 is formed so that, when the water receiving component 900 is attached to the lower end sealing wall portion 715, it can cover the entire lower end surface of the indoor side covering material 3333 of the meeting stile inner frame covering material 333 on the meeting stile inner frame 33 from the lower end sealing wall portion 715. The water receiving component body 901 also covers the lower end surfaces of the opposing portions between the indoor side covering material 3333 and the outer peripheral side covering material 3331, and between the opposing portions between the indoor side covering material 3333 and the inner peripheral side covering material 3332.

[0213] The pair of engaging pieces 902, 902 each consist of a claw. The water receiving component 900 is attached to the lower surface of the lower end sealing wall 715 by the pair of engaging pieces 902, 902 being inserted into and engaging with the pair of component mounting holes 716, 716 of the lower end sealing wall 715.

[0214] The vertical wall portion 903 rises upward from the end of the water receiving component body 901. In this embodiment, the vertical wall portion 903 is formed to rise along the inner periphery of the meeting stile inner frame covering material 333.

[0215] As shown in Figure 24, the water receiving component 900 is attached to the lower end sealing wall portion 715 of the lower end cap 710, and the water receiving component body 901 covers from below the portion of the meeting stile inner frame 33 that protrudes from the lower frame 22 toward the indoor side X2. Therefore, even if condensation water flows outward from the lower end sealing wall portion 715 inside the meeting stile inner frame 33, it can be received by the water receiving component body 901. The outdoor side X1 end of the water receiving component body 901 is positioned on the angle portion 226 of the lower frame 22. Therefore, the received condensation water will not drip down from the angle portion 226 toward the indoor side X2.

[0216] The vertical wall portion 903 rises along the inner periphery of the meeting stile inner frame covering material 333. Therefore, when the inner sash 3 is opened to the left in Figure 24, it is possible to prevent condensation on the water receiving component body 901 from being discharged to the inner periphery of the meeting stile inner frame 33. The vertical wall portion 903 may also be formed to rise along the left and right periphery and visible surfaces of the meeting stile inner frame covering material 333.

[0217] Furthermore, the water receiving component body 901 may be formed to protrude outward from the outer peripheral surface 33b of the meeting stile inner frame 33, inward from the inner peripheral surface 33c of the inner peripheral surface 33, and inward from the indoor side X2 beyond the visible surface 33a of the indoor side X2, so that it can receive condensation water and the like that generated on the surface of the meeting stile inner frame 33.

[0218] [Upper end cap for butt joint frame] Figure 25 shows the upper end cap 800 provided on the upper end of the butt joint frame 44 of the inner sash 4. The upper end cap 800 also functions as an upper sway stopper component that suppresses swaying of the upper end of the inner sash 4. The upper end cap 800 is inserted and attached to the upper end of the meeting joint inner frame 44. The upper end cap 800 has an upper end cap body 801, an interior-side visible wall portion 802, and an upper end sealing wall portion 803.

[0219] The upper end cap body 801 has a planar shape that corresponds to the planar shape of the region extending from the butt joint frame body 441 to the outdoor side wall portion 4441 of the frame covering body 444, and is formed in a block shape that is inserted inside the butt joint frame 44. The upper end cap body 801 is inserted into the butt joint frame 44 from above and is positioned at the upper end of the butt joint frame 44, covering the upper end surface of the butt joint frame 44.

[0220] The upper end cap body 801 has a groove 8011 that opens to the upper surface 801a. The groove 8011 is formed in a U shape in cross-section, extends in the left-right direction of the inner sash 4 along the extension direction of the upper frame 41, and penetrates the upper end cap body 801 in the left-right direction. The groove 8011 engages with the upper rail 21b on the indoor side of the upper frame 21 when the inner sash 4 is housed within the frame 2.

[0221] The upper end cap body 801 is positioned to face the outer circumference of the butt joint frame 44. The upper end cap body 801 has one opening 8012. The opening 8012 is a hole through which a screw SC31 is inserted to fix the upper end cap 800 to the upper frame 41. The screw SC31 is a fastener that fixes the vertical and horizontal frames together. The screw SC31 is inserted through the opening 8012 and screwed into a tapping hole 1141 formed in the upper frame body 1100.

[0222] The interior-facing visible wall portion 802 is positioned at the interior-facing end X2 of the upper end cap body 801 and faces the interior-facing side X2. The interior-facing visible wall portion 802 is exposed at the upper end of the butt joint frame 44 and forms the interior-facing visible surface X2 of the upper end cap 800. The width of the interior-facing visible wall portion 802 in the left-right direction corresponds to the width of the frame covering portion 442 of the butt joint frame 44 in the left-right direction.

[0223] The upper end sealing wall portion 803 is made of a rectangular flat plate and protrudes from the lower end of the indoor side facing wall portion 802 toward the indoor side X2 and toward the outer periphery of the butt frame 44, and is positioned facing upward. The external shape of the upper end sealing wall portion 803 corresponds to the plan view shape of the area on the indoor side X2 of the butt frame 44. The upper end sealing wall portion 803 is provided with a locking plate 8031 ​​that protrudes downward from its lower surface. The outer periphery end of the upper end sealing wall portion 803 is provided with a projection wall portion 8032 that protrudes downward.

[0224] As shown in Figure 25, the upper end cap 800 is attached to the upper end of the butt joint frame 44 by inserting it into the inside of the butt joint frame 44 from above. The upper end cap body 801 is exposed facing the outer circumference of the butt joint frame 44. The upper end cap 800 is fixed to the upper frame 41 by a screw SC31 that passes through the opening 8012 of the upper end cap body 801. The interior side facing wall portion 802 is positioned flush with the interior side facing surface 41a of the upper frame 41 X2.

[0225] The upper sealing wall portion 803 fits inside the butt joint frame covering material 446 of the butt joint frame 44. In the butt joint frame 44, the portion of the frame covering body 444 on the indoor side X2 is positioned below the upper end surface 446a of the butt joint frame covering material 446, at a distance equal to or greater than the thickness of the upper sealing wall portion 803. Therefore, the upper sealing plate portion 803 is positioned flush with the upper end surface 446a of the butt joint frame covering material 446, sealing the hollow portion S44 of the frame covering body 444 and preventing dust and other debris from entering from above. The upper sealing wall portion 803 is positioned to protrude further inward X2 than the facing surface 41a on the indoor side X2 of the inner sash material G and the upper frame 41.

[0226] The projection wall portion 8032 provided on the upper end sealing wall portion 803 is positioned above the outer peripheral end portion 4451a of the attachment 445 and the elastic member 4446, and constitutes a part of the projection surface 44b of the butt joint frame 44.

[0227] [Bottom end cap for butt joint frame] Figures 26 to 30 show the lower end cap 810 provided at the lower end of the butt joint frame 44 of the inner sash 4. The lower end cap 810 also functions as a lower sway stopper component that suppresses swaying of the lower end of the inner sash 4. The lower end cap 810 is inserted and attached to the lower end of the butt joint frame 44. The lower end cap 810 has a lower end cap body 811, an interior-side visible wall portion 812, and a lower end sealing wall portion 813.

[0228] The lower end cap body 811, like the upper end cap body 801 of the upper end cap 800, has a planar shape corresponding to the planar shape of the area extending from the butt joint frame body 441 to the outdoor side wall portion 4441 of the frame covering body 444, and is formed in a block shape that is inserted inside the butt joint frame 44. The lower end cap body 811 is inserted into the butt joint frame 44 from below and is positioned at the lower end of the butt joint frame 44, covering the lower end surface of the butt joint frame 44.

[0229] The lower end cap body 811 has a groove 8111 that opens to the lower surface 811a. The groove 8111 is formed in a downward U-shape in cross-section, extends in the left-right direction of the inner sash 4 along the extension direction of the lower frame 42, and penetrates the lower end cap body 811 in the left-right direction. The groove 8111 engages with the lower rail 21b on the indoor side of the lower frame 22 when the inner sash 4 is housed within the frame 2.

[0230] The lower end cap body 811 is positioned to face the outer circumference of the butt joint frame 44. The lower end cap body 811 has two openings, upper and lower, 8112 and 8113. Opening 8112 is a hole through which a screw SC32 is inserted to fix the lower end cap 810 to the lower frame 42. The screw SC32 is a fastener that fixes the vertical and horizontal frames together. The screw SC32 is inserted through opening 8112 and screwed into a tapping hole 2131 formed in the lower frame body 2100. As shown in Figures 26, 27 and 29, a drain hole 8114 is formed on the lower surface 811a of the lower end cap body 811. The drain hole 8114 is located on the outdoor side X1 of the angle portion 226 of the lower frame 22 and drains condensation water received by the lower end cap body 811 onto the lower frame 22.

[0231] The interior-facing visible wall portion 812 is positioned at the interior-facing end X2 of the lower end cap body 811 and faces the interior-facing side X2. The interior-facing visible wall portion 812 is exposed at the lower end of the butt joint frame 44 and forms the interior-facing visible surface X2 of the lower end cap 810. The width of the interior-facing visible wall portion 812 in the left-right direction corresponds to the width of the frame covering portion 442 of the butt joint frame 44 in the left-right direction.

[0232] The lower end sealing wall portion 813 is made of a rectangular flat plate and protrudes from the upper end of the indoor side facing wall portion 812 toward the indoor side X2 and toward the outer periphery of the butt frame 44, and is positioned facing downward. The external shape of the lower end sealing wall portion 813 corresponds to the plan view shape of the area on the indoor side X2 of the butt frame 44 relative to the bridge portion 443. The lower end sealing wall portion 813 is formed by an inclined surface that slopes downward from the indoor side X2 toward the outdoor side X1. The lower end sealing wall portion 813 is provided with a locking plate 8131 that protrudes upward from its upper surface. The outer periphery end of the lower end sealing wall portion 813 is provided with a projection wall portion 8132 that protrudes upward.

[0233] As shown in Figure 27, the lower end cap 810 is attached to the lower end of the butt joint frame 44 by inserting it into the inside of the butt joint frame 44 from below. The lower end cap body 811 is exposed facing the outer circumference of the butt joint frame 44. The lower end cap 810 is fixed to the lower frame 42 by a screw SC32 that passes through the upper opening 8112 of the lower end cap body 811. The interior side visible wall portion 812 is positioned flush with the interior side visible surface 42a of the lower frame 42.

[0234] The lower end sealing wall portion 813 fits inside the butt joint frame covering material 446 of the butt joint frame 44. In the butt joint frame 44, the portion of the frame covering body 444 on the indoor side X2 is positioned above the lower end surface 446b of the butt joint frame covering material 446, at a distance equal to or greater than the thickness of the lower end sealing wall portion 813. Therefore, the lower end sealing plate portion 813 is positioned substantially flush with the lower end surface 446b of the butt joint frame covering material 446, sealing the hollow portion S44 of the frame covering body 444 and preventing dust and other debris from entering from below. The lower end sealing wall portion 813 is positioned to protrude further inward X2 than the facing surface 42a on the indoor side X2 of the inner sash material G and the lower frame 42.

[0235] As shown in Figures 27 to 29, a component mounting hole 814 is formed in the lower end sealing wall portion 813. The component mounting hole 814 is a hole that constitutes a component mounting portion to which a functional component such as the water receiving component 900 shown in Figure 19 can be detachably attached, and it penetrates the lower end sealing wall portion 813 vertically. In this embodiment, the lower end sealing wall portion 813 is provided with two rectangular component mounting holes 814, 814 arranged side by side in the left-right direction, but the component mounting holes 814, 814 do not necessarily have to be arranged side by side in the left-right direction. The component mounting holes 814, 814 may be arranged side by side in the depth direction, for example, or diagonally with respect to the depth direction. The number of component mounting holes 814 is not limited to two, and it is sufficient to have at least one in the lower end sealing wall portion 813. The shape of the component mounting hole 814 is not limited to a rectangle, but may be other shapes such as a round hole.

[0236] The lower end sealing wall portion 813 of the lower end cap 810, which is attached to the lower end of the butt joint frame 44, is positioned inside the butt joint frame covering material 446. For example, when condensation water generated in the hollow portion S44 of the frame covering body 444, the ventilation channel Vc3 between the frame covering body 444 and the attachment 445, and the ventilation channel Vc4 between the attachment 445 and the butt joint frame covering material 446 flows down, it receives the condensation water. The condensation water received by the lower end sealing wall portion 813 flows outwards X1 along the slope of the lower end sealing wall portion 813 and is discharged onto the lower frame 22 from the drain hole 8114 of the lower end cap body 811.

[0237] As shown in Figure 28, the two component mounting holes 814, 814 provided in the lower end sealing wall portion 813 each have vertical wall portions 8141, 8141 that project upward independently. The vertical wall portion 8141 is formed in a rectangular tubular shape that projects upward along the four sides of the component mounting hole 814. The vertical wall portion 8141 may be in any other shape, such as a cylindrical shape, as long as it can surround the component mounting hole 814. This prevents the water from being discharged from the component mounting holes 814, 814 even if a large amount of condensation flows down into the lower end sealing wall portion 813, and prevents the room from getting wet from the condensation water discharged from the component mounting holes 814, 814. The lower end sealing wall portion 813 may also be provided with a single vertical wall portion 8141 that surrounds all of the multiple component mounting holes 81.

[0238] As shown in Figures 26 and 27, a water receiving component 900, which functions the same as the lower end cap 710, is attached to the lower end cap 810. As shown in Figure 30, the water receiving component 900 is attached to the lower end sealing wall portion 813 of the lower end cap 810, and the water receiving component body 901 covers from below the portion of the butt joint frame 44 that protrudes from the lower frame 22 toward the indoor side X2. Therefore, even if condensation water flows outward from the lower end sealing wall portion 813 inside the butt joint frame 44, it can be received by the water receiving component body 901. The outdoor side X1 end of the water receiving component body 901 is positioned on the angle portion 226 of the lower frame 22. Therefore, the received condensation water will not drip down from the angle portion 226 toward the indoor side X2.

[0239] The vertical wall portion 903 of the water receiving component 900 may be formed to rise along the left and right facing surfaces and visible surfaces of the frame covering material 446. Furthermore, the water receiving component body 901 may be formed to protrude further outward than the outer facing surface 44b of the outer facing surface 44b, further inward than the inner facing surface 44c, and further inward than the visible surface 44a on the indoor side X2, so that it can receive condensation water and the like that generated on the surface of the butt frame 44.

[0240] Figure 31 shows the gap adjustment component 910 as a functional component. The gap adjustment component 910 has a flat gap adjustment component body 911, a pair of engaging pieces 912, 912, and a vertical wall portion 913. The gap adjustment component 910 has the same configuration as the water receiving component 900, except that the gap adjustment component body 911 is thicker.

[0241] Figure 32 shows the gap adjustment component 910 attached to the lower end cap 810 of the lower end of the butt joint frame 44. The gap adjustment component 910 can reduce the gap g between the lower end of the butt joint frame 44 and the angle portion 226 of the lower frame 2. Therefore, it is possible to suppress the inflow of cold air transmitted from the lower end of the butt joint frame 44 into the indoor side X2, thereby improving thermal insulation. The gap adjustment component 910 can also be similarly attached to the lower end cap 710 of the lower end of the meeting stile inner frame 33.

[0242] The component mounting holes 716 and 814 of the lower end caps 710 and 810 are positioned at specific locations on the lower end sealing walls 715 and 814. Specifically, as shown in Figure 24, the component mounting hole 716 of the lower end cap 710 is positioned at a distance L1 from the inner circumferential surface 33c of the meeting stile inner frame 33, and at a distance L2 from the visible surface 33a on the indoor side X2 of the meeting stile inner frame 33. As shown in Figure 30, the component mounting hole 814 of the lower end cap 810 is positioned at a distance L1 from the inner circumferential surface 44c of the butt joint frame 44, and at a distance L2 from the visible surface 44a on the indoor side X2 of the butt joint frame 44. This allows functional components such as the water receiving component 900 and the gap adjustment component 910 to be attached to the lower end caps 710 and 810, which are positioned at different locations, eliminating the need to prepare dedicated components for each end cap.

[0243] The upper end caps 700, 800 and lower end caps 710, 810 provided at the upper and lower ends of the meeting stiles 33, 43 do not protrude outwards from the outer periphery of the meeting stiles 33, 43. In this case, when the inner sashes 3, 4 are opened, the crescent locks 35, 45 (see Figure 2) provided on the meeting stiles 33, 43 may collide with the vertical frames 23, 24. Therefore, as shown in Figures 1, 33, and 34, it is preferable to provide a stopper member on at least one of the upper stiles 31, 41 and the lower stiles 32, 42 of the inner sashes 3, 4. In this embodiment, the inner sashes 3, 4 are provided with stopper members 36, 36, 46, 46 on both the upper stiles 31, 41 and the lower stiles 32, 42, respectively.

[0244] The stopper members 36 and 46 are made of resin blocks. The stopper members 36 and 36 of the inner sliding door 3 are positioned on the upper frame body 1100 and the lower frame body 2100 of the upper frame 31 and the lower frame 32 of the inner sliding door 3, and are attached in close proximity to the upper and lower ends of the butt joint frame 34. The stopper members 46 and 46 of the inner sliding door 4 are positioned on the upper frame body 1100 and the lower frame body 2100 of the upper frame 41 and the lower frame 42 of the inner sliding door 4, and are attached in close proximity to the upper and lower ends of the butt joint frame 34. According to this, when the inner sashes 3 and 4 are opened, the stopper members 36, 36, 46, and 46 collide with the facing surface of the meeting outer frame 53 and 63 of the outer sashes 5 and 6 on the outdoor side X1 of the inner sashes 3 and 4 before the crescent locks 35 and 45 collide with the vertical frames 23 and 24, thereby defining the limit position in the opening direction. There is no need to provide stopper members on the indoor upper rail 21b and indoor lower rail 22b of the upper frame 21 and lower frame 22 on which the inner sashes 3 and 4 slide, and the stopper members 36 and 46 are not visible from the indoor side X2, thus further improving the design of the sliding window 1.

[0245] In the above embodiment, component mounting holes 716, 814 were formed in the lower end sealing wall portions 715, 813 of the lower end caps 710, 810 to attach the functional components, the water receiving component 900 and the gap adjustment component 910. However, by similarly providing component mounting holes or other component mounting portions in the upper end sealing wall portions 705, 803 of the upper end caps 700, 800, functional components such as gap adjustment components can also be detachably attached to the upper end caps 700, 800.

[0246] The component mounting section for attaching functional components only needs to be capable of detachably attaching the functional components, and is not limited to being composed of holes for inserting engaging means of functional components (engaging pieces 902, 912 of the water receiving component 900 and gap adjustment component 910), such as component mounting holes 716, 814. The component mounting section may be, for example, a mounting hole such as a screw hole for fixing the functional component with a fastener such as a screw, or an engaging piece such as a hook or elastic piece that protrudes from the wall and can be attached by hooking or clamping the functional component. The component mounting section may have a magnet and be configured to magnetically attract the functional component. The component mounting section may have a hook-and-loop fastener and be configured to be capable of attaching the functional component by the hook-and-loop fastener.

[0247] The component mounting portion for attaching functional components is not limited to those provided on the upper end sealing wall portions 705, 803 of the upper end caps 700, 800, or the lower end sealing wall portions 715, 813 of the lower end caps 710, 810, as shown in the above embodiments. The component mounting portion only needs to be able to attach functional components to the space formed between the indoor-side visible wall portions 704, 802 and the upper end sealing wall portions 705, 803 of the upper end caps 700, 800, or to the space formed between the indoor-side visible wall portions 714, 812 and the lower end sealing wall portions 715, 813 of the lower end caps 710, 810. Therefore, the component mounting portion on the upper end caps 700, 800 only needs to be provided on at least one of the indoor-side visible wall portions 704, 802 which are exposed to the indoor side X2, and the upper end sealing wall portions 705, 803 which are exposed upward. The component mounting portion of the lower end caps 710, 810 only needs to be provided on at least one of the indoor-facing visible wall portions 714, 812 which are exposed to the indoor-facing side X2, and the lower end sealing wall portions 715, 813 which are exposed downwards.

[0248] The sliding window 1, which is a building component of this embodiment, provides the following effects.

[0249] The joinery of this embodiment is a sliding window 1 comprising a frame 2 having an upper frame 21, a lower frame 22, and a pair of left and right vertical frames 23, 24, and inner sashes 3, 4 and outer sashes 5, 6 arranged on the inner circumference of the frame 2, wherein the inner sashes 3, 4 have upper stiles 31, 41, lower stiles 32, 42, and a pair of left and right vertical stiles, namely meeting stiles 33 and butt stiles 44, and the upper and lower ends of the meeting stiles 33 and butt stiles 44 of the inner sashes 3, 4 are fitted with upper end caps 700, 800 and lower end caps 710,810 are arranged, and the upper end caps 700,800 and lower end caps 710,810 have an indoor-side visible wall portion 704,802,714,812, an upper end sealing wall portion 705,803, or a lower end sealing wall portion 715,813 which are wall portions that are exposed to at least one of the indoor side X2 and either above or below, and the wall portion has at least one component mounting portion (component mounting hole 716,814, etc.) to which a functional component can be attached.

[0250] According to this, various functional components can be retrofitted by utilizing the component mounting sections provided on the walls of the upper end caps 700, 800 or the lower end caps 710, 810. Therefore, functions can be easily added later without changing the upper end caps 700, 800 or the lower end caps 710, 810.

[0251] In this embodiment, the lower end caps 710 and 810 are positioned at the lower ends of the meeting stile inner frame 33 and the butt stile 44.

[0252] According to this, various functional components can be retrofitted to the lower ends of the meeting stile inner frame 3 and the butt stile 44 of the inner sliding doors 3 and 4.

[0253] In this embodiment, the lower end sealing wall portions 715 and 813, which are exposed and positioned downward, are inclined downward toward the outdoor side X2.

[0254] According to this, condensation water that flows down from the inside of the meeting stile 33 and the butt stile 44 to the lower end sealing wall portions 715 and 813 can be smoothly discharged to the outside X1, so there is no risk of wetting the interior with condensation water.

[0255] In this embodiment, the component mounting portion is a component mounting hole 716, 814 to which a functional component can be attached, and the lower end sealing wall portion 715, 813 has vertical wall portions 7161, 8141 that protrude upward so as to surround the component mounting hole 716, 814.

[0256] According to this, even if a large amount of condensation water flows down the lower end sealing wall portion 715, 813, the vertical wall portion 7161, 8141 prevents it from flowing into the component mounting hole 716, 814, thus preventing it from being discharged from the component mounting hole 716, 814.

[0257] In this embodiment, the functional component is the water receiving component 900.

[0258] According to this, dew condensation water and the like that has flowed down from the lower ends of the meeting inner stile 33 and the abutting stile 44 to the outside of the lower end sealing wall portions 715, 813 can be received by the water receiving component 900, so there is no risk of wetting the indoor space with the dew condensation water or the like.

[0259] In the present embodiment, the water receiving component 900, in a state of being attached to the lower end sealing wall portions 715, 813, protrudes toward the indoor side X2 beyond the indoor side facing surfaces 33a, 44a of the meeting inner stile 33 and the abutting stile 44.

[0260] According to this, dew condensation water and the like generated on the surfaces of the meeting inner stile 33 and the abutting stile 44 can also be received by the water receiving component 900.

[0261] In the present embodiment, the functional component is a gap adjusting component 910 that, in a state of being attached to the indoor side facing wall portions 704, 802, 714, 812, the upper end sealing wall portions 705, 803 or the lower end sealing wall portions 715, 813, reduces the gap between the upper frame 21 and the upper end portion of the meeting inner stile 33 or the abutting stile 44, or the gap between the lower frame 22 and the lower end portion of the meeting inner stile 33 or the abutting stile 44.

[0262] According to this, it is possible to suppress the cold air transmitted from the upper end portion or the lower end portion of the meeting inner stile 33 and the abutting stile 44 from flowing into the indoor side X2, and improve the heat insulation performance.

[0263] In the present embodiment, the functional component has engaging pieces 902, 912 that engage with the component mounting holes 716, 814.

[0264] According to this, the functional component can be easily detachably attached to the lower end sealing wall portions 715, 813 of the lower end caps 710, 810 by using the component mounting holes 716, 814.

[0265] The functional components of this embodiment are configured to be attachable to the interior-facing visible wall portions 704, 802, 714, 812, upper end sealing wall portions 705, 803, or lower end sealing wall portions 715, 813 of the upper end caps 700, 800 and lower end caps 710, 810 of the sliding window 1 described above.

[0266] By utilizing the component mounting section provided on the wall of the upper end cap 700, 800 or the lower end cap 710, 810, it is possible to easily add functional components later without modifying the upper end cap 700, 800 or the lower end cap 710, 810.

[0267] This disclosure is not limited to the embodiments described above and can be modified as appropriate. For example, the covering material is not limited to wood, but may be made of non-metallic materials such as ceramic plates, tiles, glass, or resin plates.

[0268] 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. A sliding window may have two sashes. The joinery disclosed herein is not limited to a sliding window, but may also be a single-sliding window, a casement window, a fixed 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.

[0269] This disclosure includes joinery as described in the following embodiments.

[0270] <Aspect 1> A frame having an upper frame, a lower frame, and a pair of left and right vertical frames, A joinery comprising a sliding screen arranged on the inner circumference of the frame, The aforementioned shoji screen has an upper frame, a lower frame, and a pair of left and right vertical frames. An end cap is placed on at least one of the upper and lower ends of the vertical frame of the shoji screen. The end cap has a wall portion that is exposed on the indoor side and on at least one of the upper or lower sides. The wall portion is a joinery having at least one component mounting portion to which a functional component can be attached.

[0271] <Aspect 2> The fitting according to Aspect 1, wherein the end cap is disposed at a lower end portion of the vertical stile.

[0272] <Aspect 3> The fitting according to Aspect 2, wherein the wall portion disposed to be exposed downward is inclined downward toward the outdoor side.

[0273] <Aspect 4> The component mounting portion is a component mounting hole to which the functional component can be mounted, The fitting according to Aspect 3, wherein the wall portion has a standing wall portion protruding upward so as to surround the component mounting hole.

[0274] <Aspect 5> The fitting according to Aspect 3 or 4, wherein the functional component is a water receiving component.

[0275] <Aspect 6> The fitting according to Aspect 5, wherein the water receiving component, in a state of being mounted on the wall portion, protrudes further toward the indoor side than the indoor side facing surface of the vertical stile.

[0276] <Aspect 7> The fitting according to any one of Aspects 1 to 4, wherein the functional component is a gap adjusting component that reduces a gap between the upper frame and the upper end portion of the vertical stile, or a gap between the lower stile and the lower end portion of the vertical stile, in a state of being mounted on the wall portion.

[0277] <Aspect 8> The fitting according to any one of Aspects 1 to 7, wherein the functional component has an engaging piece that engages with the component mounting hole.

[0278] <Aspect 9> A functional component configured to be mountable to the wall portion of the end cap in the fitting according to any one of Aspects 1 to 8.

Description of Reference Numerals

[0279] 1 Sliding window, 2 Frame, 21 Upper frame 21, 22 Lower frame, 23,24 Vertical frame, 3,4 Inner sash, 5,6 Outer sash, 31,41 Upper frame, 32,42 Lower frame, 33 Meeting stile inner frame (vertical frame), 33a,44a Indoor side facing surface, 44 Butt joint frame (vertical frame), 710,810 Lower end cap, 714,812 Indoor side facing wall section (wall section), 715,813 Lower end sealing wall section (wall section), 716,814 Part mounting hole (part mounting section), 7161,8141 Vertical wall section, 900 Water receiving part (functional part), 910 Gap adjustment part (functional part), 902,912 Engaging pieces

Claims

1. A frame having an upper frame, a lower frame, and a pair of left and right vertical frames, A joinery comprising a sliding screen arranged on the inner circumference of the frame, The aforementioned shoji screen has an upper frame, a lower frame, and a pair of left and right vertical frames. An end cap is placed on at least one of the upper and lower ends of the vertical frame of the shoji screen. The end cap has a wall portion that is exposed on the indoor side and on at least one of the upper or lower sides. The wall portion is a joinery having at least one component mounting portion to which a functional component can be attached.

2. The end cap is positioned at the lower end of the vertical frame, as described in claim 1.

3. The building fitting according to claim 2, wherein the wall portion exposed and positioned below is sloped downward toward the exterior.

4. The aforementioned component mounting portion is a component mounting hole to which the functional component can be attached. The building fixture according to claim 3, wherein the wall portion has a vertical wall portion that protrudes upward so as to surround the component mounting hole.

5. The building fitting according to claim 3 or 4, wherein the functional component is a water receiving component.

6. The joinery according to claim 5, wherein the water receiving component, when attached to the wall, protrudes inward from the interior side of the interior-facing surface of the vertical frame.

7. The joinery according to any one of claims 1 to 4, wherein the functional component is a gap adjustment component that, when attached to the wall, reduces the gap between the upper frame and the upper end of the vertical frame, or the gap between the lower frame and the lower end of the vertical frame.

8. The building component according to any one of claims 1 to 4, wherein the functional component has an engaging piece that engages with the mounting hole for the component.

9. A functional component configured to be attachable to the wall portion of the end cap in a building fitting according to any one of claims 1 to 4.

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