Building materials

Abstract

To provide a joinery piece in which the strength of the lower frame rail, which includes at least a resin component, is improved. [Solution] The building fitting comprises a frame consisting of an upper frame, a lower frame, and a pair of left and right vertical frames, which are provided in an opening in the building structure, and a sliding screen provided on the lower frame so as to be slidable along a lower frame side rail, wherein the lower frame side rail is formed to include at least a resin member and has a reinforcing member that reinforces the lower frame side rail.

Description

[Technical Field]

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

[0002] Conventionally, there are known joinery fixtures in which a sliding screen is housed inside a frame made of metal and resin members (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-183046 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional joinery, the rails of the frame that guide the sliding movement of the shoji screen are composed of two parts: a metal component and a resin component. As a result, there is a problem in that the strength of the rail on the lower frame side, where the load of the shoji screen is particularly applied, is weak.

[0005] This disclosure aims to provide a building fixture in which the strength of the lower frame rail, which includes at least a resin component, is improved. [Means for solving the problem]

[0006] The present disclosure relates to a fitting having a frame body consisting of an upper frame, a lower frame, and a pair of left and right vertical frames that are installed in an opening in a building structure, and a shoji screen that is slidably installed along a lower frame side rail installed on the lower frame, wherein the lower frame side rail is formed including a metal member and a resin member and has a reinforcing member that reinforces the lower frame side rail. [Brief explanation of the drawings]

[0007] [Figure 1] This is a front view of the door / window according to the first embodiment, as seen from the outside. [Figure 2] Figure 1 is a vertical cross-sectional view of the joinery shown. [Figure 3] Figure 1 is a cross-sectional view of the joinery shown. [Figure 4] FIG. 3 is an enlarged vertical cross-sectional view showing the upper frame portion of the fitting shown in FIG. 2. [Figure 5] FIG. 5 is an enlarged vertical cross-sectional view showing a newly installed upper frame of the fitting shown in FIG. 4. [Figure 6] FIG. 3 is an enlarged vertical cross-sectional view showing the lower frame portion of the fitting shown in FIG. 2. [Figure 7] FIG. 7 is an enlarged vertical cross-sectional view showing a newly installed lower frame of the fitting shown in FIG. 6. [Figure 8] FIG. 4 is an enlarged cross-sectional view showing the left vertical frame portion of the fitting shown in FIG. 3. [Figure 9] FIG. 9 is an enlarged vertical cross-sectional view showing a newly installed vertical frame on the left side of the fitting shown in FIG. 8. [Figure 10] FIG. 4 is an enlarged cross-sectional view showing the right-hand vertical frame portion of the fitting shown in FIG. 3. [Figure 11] FIG. 11 is an enlarged vertical cross-sectional view showing a newly installed vertical frame on the right side of the fitting shown in FIG. [Figure 12] A vertical cross-sectional view showing another embodiment of the existing lower frame. [Figure 13] This is a vertical cross-sectional view of a fitting with a shoji screen containing three layers of glass. [Figure 14] This is a cross-sectional view of a fitting with a shoji screen containing three layers of glass. [Figure 15] FIG. 10 is a vertical cross-sectional view showing an enlarged view of the upper frame portion of the fitting according to the second embodiment. [Figure 16] FIG. 10 is an enlarged cross-sectional view showing the left vertical frame portion of the fitting according to the second embodiment. [Figure 17] FIG. 10 is a diagram showing a method for installing fittings according to a second embodiment. [Figure 18] FIG. 10 is a diagram showing a method for installing fittings according to a second embodiment. [Figure 19] FIG. 10 is a diagram showing a method for installing fittings according to a second embodiment. [Figure 20] FIG. 10 is a diagram showing a method for installing fittings according to a second embodiment. [Figure 21] This is a vertical cross-sectional view showing an enlarged view of the upper frame portion of the joinery according to the third embodiment. [Figure 22] This is a vertical cross-sectional view showing an enlarged view of the lower frame portion of the door / window fitting according to the third embodiment. [Figure 23] This is a cross-sectional view showing an enlarged view of the left vertical frame portion of the door / window fitting according to the third embodiment. [Figure 24] This is a vertical cross-sectional view showing an enlarged view of the lower frame portion of the door / window according to the fourth embodiment. [Figure 25] Figure 24 is a magnified vertical cross-sectional view showing the newly installed lower frame of the door / window component. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the drawings. The fitting 1 according to this embodiment is a remodeling fitting for renovation in which a new frame 3 is attached to an existing frame 2 in a state where the existing frame 2 is attached to an opening in a building skeleton 100.

[0009] In this specification, the depth direction is the direction along the interior-exterior direction of the door / window 1. The face direction is the direction along the surface direction of the facing material of the door / window 1, and is perpendicular to the depth direction. In the drawings, the exterior side of the door / window 1 is referred to as "exterior side X1," and the interior side of the door / window 1 is referred to as "interior side X2." The horizontal direction when the door / window 1 is viewed from the front is referred to as "left and right." The direction toward the center of the door / window 1 when the door / window 1 is viewed from the front is referred to as "inward," and the direction away from the center of the door / window 1 is referred to as "outward."

[0010] The joinery 1 shown in the first embodiment is a sliding window type renovation sash fitted into an opening in a wooden building frame 100. The joinery 1 comprises an existing frame 2, a new frame 3, two resin sashes 41 and 42, and one screen door 43. The existing frame 2 is an existing frame body that is installed around the top, bottom, left, and right sides of the opening in the building frame 100. The new frame 3 is a new frame body that is installed around the top, bottom, left, and right sides on the inner side of the existing frame 2. The sashes 41 and 42 and the screen door 43 are fitted inside the new frame 3 so as to be slidable in the left and right directions. As shown in Figure 1, a crescent lock 44 is attached to the sash 41 located on the interior side X2. Drainage ports 329 for draining rainwater that flows into the lower frame portion are provided at both the left and right ends of the visible surface on the exterior side X1 of the lower frame portion. In FIG. 1, the screen door 43 is not shown.

[0011] As shown in Figures 2 and 3, the existing frame 2 is formed by assembling four frame members—an existing upper frame 21, an existing lower frame 22, and a pair of existing vertical frames 23—into a rectangle, and is installed on the inside of the opening in the building structure 100 before renovation. The existing upper frame 21, existing lower frame 22, and the pair of existing vertical frames 23 are each made of extruded profiles of metal such as aluminum or resin such as PVC. A frame member 101 is placed on the interior side of the existing frame 2. The frame member 101 is installed around all four sides of the inner circumferential surface of the opening in the building structure 100, extending inward from the interior end face 2a of the interior side X2 of the existing frame 2. The gap between the four-sided assembled existing frame 2 and the exterior wall material 102 provided on the exterior side X1 of the building structure 100 is sealed around all four sides with a backup material 103 and a sealing material 104.

[0012] As shown in Figures 2 and 4, the existing upper frame 21 is positioned above the opening in the building structure 100 and fixed in a position offset to the exterior side X1 of the opening. The existing upper frame 21 has a pair of guide rails 211a and 211b for the existing sash and a guide rail 211c for the existing screen door, both projecting downwards.

[0013] As shown in Figures 2 and 5, the existing lower frame 22 is positioned at the bottom of the opening in the building structure 100 and fixed in a position offset to the exterior side X1 of the opening. The existing lower frame 22 has a pair of guide rails 221a and 221b for the existing sash and a guide rail 221c for the existing screen door, both projecting upward. The height of the existing lower frame 22 is formed to gradually decrease from the guide rail 221a on the interior side X2 to the guide rail 221c on the exterior side X1.

[0014] As shown in Figures 3, 6 and 7, the existing vertical frames 23 are arranged on the left and right vertical portions of the opening of the building skeleton 100, and are fixed at positions biased towards the outside side X1 of the opening.

[0015] The newly installed frame 3 in this embodiment is a dedicated frame specifically formed for the existing frame 2 to correspond to the shape of the existing frame 2. As shown in Figures 2 and 3, the newly installed frame 3 is attached to the inner circumference extending from the existing frame 2 to the frame member 101, with four frame members—a newly installed upper frame 31, a newly installed lower frame 32, and a pair of newly installed vertical frames 33—assembled in a rectangular shape on all four sides. Specifically, the newly installed frame 3 is positioned on the inner circumference of the existing frame 2 and the frame member 101 by being brought out from the indoor side X2 to the outdoor side X1 of the opening in the building structure 100 with all four sides assembled, and then pulled back into the indoor side X2. The newly installed frame 3, positioned on the inner circumference of the existing frame 2 and the frame member 101, is fixed to the building structure 100 on the indoor side X2 of the existing frame 2 by fixing members SC1, SC2, and SC3.

[0016] Next, the configurations of the newly constructed upper frame 31, the newly constructed lower frame 32, and the pair of newly constructed vertical frames 33 will be explained individually.

[0017] First, let me explain the newly established upper frame 31.

[0018] The new upper frame 31 extends left and right along the length of the existing upper frame 21. The new upper frame 31 has a length in the front direction that extends from the guide rail 211c of the existing upper frame 21 to near the center of the frame member 101 in the front direction. The new upper frame 31 is composed of a frame member main body 31A and a resin rail member 31B. The rail member 31B covers the lower side of the frame member main body 31A, and the upper stile members 41B1 and 42B1 of the shoji screens 41 and 42 (described later) are positioned so as to straddle the rail member 31B (outdoor guide rail portion 3101, indoor guide rail portion 3103) and sandwich the rail member 31B (outdoor guide rail portion 3101, indoor guide rail portion 3103) from the indoor / outdoor direction, thereby guiding the sliding movement of the shoji screens 41 and 42.

[0019] As shown in Figures 4 and 5, the frame member main body 31A is divided into two in the front direction: an outdoor frame member 311 and an indoor frame member 312. The outdoor frame member 311 and the indoor frame member 312 are both metal frame members, and are each made of extruded shapes extruded in the longitudinal direction from a metal material such as aluminum. The outdoor frame member 311 and the indoor frame member 312 are integrally connected by a connecting member 313. The connecting member 313 is made of a thermally insulating material such as resin, and blocks heat transfer from the outdoor frame member 311 to the indoor frame member 312 in the frame member main body 31A.

[0020] The frame member main body 31A integrally includes a pair of guide rails 314a, 314b corresponding to the two shoji screens 41, 42 to be placed inside the new frame 3, and a guide rail 314c for the screen door 43 to be placed on the outermost side X1 of the new frame 3. The guide rails 314b and 314c are arranged in the outer frame member 311 and protrude downward. The guide rail 314a is arranged adjacent to the connecting member 313 in the inner frame member 312 and protrudes downward. The guide rails 314a, 314b and the guide rail 314c extend over the entire length of the frame member main body 31A.

[0021] The outdoor frame member 311 has a hollow portion 3111 with a generally rectangular cross section that extends from the portion where the guide rail 314b is arranged to the connecting member 313. The indoor frame member 312 has a hollow portion 3121 with a generally rectangular cross section that extends from the connecting member 313 toward the indoor side X2. The top surface 311a of the outdoor frame member 311 corresponding to the hollow portion 3111 and the top surface 312a of the indoor frame member 312 corresponding to the hollow portion 3121 are both flat surfaces and are arranged flush with each other in the projection direction of the frame member main body 31A. The connecting member 313 does not protrude above these top surfaces 311a, 312a.

[0022] The outdoor frame member 311 has an outdoor extension 3112 integrally therewith, which extends toward the outdoor side X1 at a position lower than the upper surface 311a of the outdoor frame member 311. The outdoor extension 3112 is arranged at the end of the new upper frame 31 on the outdoor side X1. Specifically, the outdoor extension 3112 is arranged between the guide rails 314b and 314c. The outdoor extension 3112 also functions as a drainage groove that channels rainwater that has seeped onto the new upper frame 31 in the left-right direction without allowing it to flow into the indoor side X2.

[0023] An outdoor wall portion 315 extending upward in the viewing direction is integrally formed at the outermost portion X1 of the outdoor extension portion 3112. The outdoor wall portion 315 protrudes further upward than the upper surfaces 311a, 312a of the outdoor frame member 311 and the indoor frame member 312, and is positioned so as to overlap, from the outdoor side X1, the outdoor side surface 211d of the outermost guide rail 211c of the existing upper frame 21. A decorative material 316 made of a metal material such as aluminum is attached to the outdoor wall portion 315 so as to be detachable from the outdoor side X1. The decorative material 316 covers the outdoor wall portion 315 and extends upward in the viewing direction beyond the existing upper frame 21, forming the viewing surface of the new upper frame 31. The decorative material 316 covers and conceals the visible surface of the existing upper frame 21 on the outside X1 and the sealing material 104 exposed between the existing upper frame 21 and the exterior wall material 102 from the outside X1.

[0024] Elastic fin members 317 are provided on the upper surface 311a of the outdoor frame member 311 in a portion facing the outdoor side X1. The fin members 317 protrude upward from the upper surface 311a of the outdoor frame member 311 so as to be close to the guide rails 211b of the existing upper frame 21. Even if rainwater seeps into the new upper frame 31 between the outdoor wall portion 315 and the guide rails 211c of the existing upper frame 21, it flows left and right through the outdoor extensions 3112 and is drained to the outer periphery of the new vertical frame 33, preventing it from seeping into the indoor side X2. Even if a large amount of rainwater seeps into the outdoor extensions 3112, the fin members 317 prevent it from seeping into the indoor side X2. Since the fin member 317 is elastic, even if the newly installed upper frame 31 comes into contact with the existing upper frame 21 when it is positioned on the inner circumference side of the existing upper frame 21, it can bend elastically and there is no risk of damage.

[0025] An attachment portion 318 for fixing the new upper frame 31 to the building skeleton 100 is integrally provided at the portion of the frame member main body 31A closest to the indoor side X2. The attachment portion 318 is arranged parallel to the upper surfaces 311a, 312a of the outdoor frame member 311 and the indoor frame member 312, and extends in a plate shape from the upper portion of the end surface 312b of the indoor side X2 of the indoor frame member 312 toward the indoor side X2.

[0026] The upper surface 318a of the mounting portion 318 is provided with at least a pair of protrusions 3181 extending in the longitudinal direction of the new upper frame 31. The pair of protrusions 3181 protrude slightly upward from the upper surface 318a of the mounting portion 318 and are arranged parallel to each other at a predetermined interval in the projection direction. The position of the upper surface 318a of the mounting portion 318 is arranged slightly below the positions of the upper surfaces 311a, 312a of the outdoor frame member 311 and the indoor frame member 312. The pair of protrusions 3181 protrude from the upper surface 318a of the mounting portion 318 to a height approximately equal to the positions of the upper surfaces 311a, 312a of the outdoor frame member 311 and the indoor frame member 312.

[0027] The rail member 31B is attached to the frame member main body 31A over the entire length of the frame member main body 31A so as to cover the underside of the frame member main body 31A, specifically, from the underside 311b of the outdoor frame member 311 to the underside 312c of the indoor frame member 312. The rail member 31B in this embodiment is divided into two resin rail members 31B1 and 31B2 that respectively correspond to the pair of guide rails 314a and 314b of the frame member main body 31A.

[0028] 5, the rail member 31B1 arranged on the outdoor side X1 is attached to the underside 311b of the outdoor frame member 311 of the frame member main body 31A. The rail member 31B1 has an outdoor guide rail portion 3101 and an outdoor cover portion 3102 extending integrally from the outdoor guide rail portion 3101 toward the indoor side X2. The outdoor guide rail portion 3101 is an upper frame side rail arranged on the outdoor side of the new upper frame 31.

[0029] The outdoor guide rail portion 3101 has a rail width in the front direction that is sufficiently larger than that of the guide rail 314b, and protrudes downward further than the guide rail 314b. More specifically, the outdoor guide rail portion 3101 has an outdoor rail wall portion 3101a, an indoor rail wall portion 3101b, and an end wall portion 3101c that connects the lower ends of the outdoor rail wall portion 3101a and the indoor rail wall portion 3101b in the front direction. The length in the front direction of the outdoor rail wall portion 3101a is shorter than the length in the front direction of the indoor rail wall portion 3101b.

[0030] The outdoor rail wall portion 3101a is disposed parallel to the guide rail 314b and protrudes further downward from the lower end of the guide rail 314b. An outdoor engagement portion 3101d formed in a hook shape toward the outdoor side X1 is provided at the upper end of the outdoor rail wall portion 3101a. The outdoor engagement portion 3101d engages, from the indoor side X2, with an engagement protrusion 314b2 provided at the lower end of the guide rail 314b so as to protrude toward the indoor side X2. The outdoor rail wall portion 3101a is disposed flush with the side surface of the guide rail 314b on the outdoor side X1 so as to extend the guide rail 314b downward.

[0031] The indoor rail wall 3101b is disposed slightly away from the guide rail 314b on the indoor side X2 and parallel to the guide rail 314b and the outdoor rail wall 3101a. A protruding portion 3101e that protrudes toward the outdoor side X1 is integrally formed at the upper end of the indoor rail wall 3101b. The protruding portion 3101e is disposed parallel to the underside 311b of the outdoor frame member 311 and abuts or is close to the underside 311b. The tip of the protruding portion 3101e on the outdoor side X1 is fitted, from the indoor side X2, into an engagement groove 314b1 provided on the indoor side X2 of the base of the guide rail 314b. The lower end of the indoor rail wall 3101b is disposed at the same position as the lower end of the outdoor rail wall 3101a.

[0032] The end wall 3101c is positioned slightly above the lower ends of the outdoor rail wall 3101a and the indoor rail wall 3101b. As a result, a groove 3101f surrounded by the end wall 3101c and the lower ends of the outdoor rail wall 3101a and the indoor rail wall 3101b is formed on the underside of the end wall 3101c and extends along the length of the outdoor guide rail 3101. The groove 3101f is sealed by fitting a sealant 3101g made of resin, rubber, or the like.

[0033] The outdoor cover portion 3102 is formed in a hollow shape with a substantially rectangular cross section, and extends from the upper end of the indoor rail wall portion 3101b over the guide rail 314a toward the indoor side X2. The outdoor cover portion 3102 substantially shields the space between the indoor rail wall portion 3101b and the guide rail 314a. The outdoor cover portion 3102 abuts or is closer to the underside 311b of the outdoor frame member 311 and the underside of the connecting member 313 on the indoor side X2 than the guide rail 314b. An indoor side engaging portion 3102a that protrudes toward the indoor side X2 is provided on the upper end surface of the indoor side X2 of the outdoor cover portion 3102. The indoor side engaging portion 3102a engages from the outdoor side X1 with an engaging groove 314a1 provided on the outdoor side X1 at the base of the guide rail 314a. The outdoor cover part 3102 prevents the outside air temperature transmitted from the existing upper frame 21 side to the new upper frame 31 from being transmitted to the inner periphery between the guide rails 314a, 314b of the new upper frame 31.

[0034] The rail member 31B2 arranged on the indoor side X2 is attached to the underside 312c of the indoor side frame member 312 of the frame member main body 31A. The rail member 31B2 has an indoor side guide rail portion 3103 and an indoor side cover portion 3104 extending integrally from the indoor side guide rail portion 3103 toward the indoor side X2. The indoor side guide rail portion 3103 protrudes downward from the frame member main body 31A to the same protruding height as the outdoor side guide rail portion 3101. The indoor side guide rail portion 3103 is an upper frame side rail arranged on the indoor side of the new upper frame 31.

[0035] The indoor guide rail portion 3103 has the same rail width in the front direction as the outdoor guide rail portion 3101, and protrudes downward below the guide rail 314a to the same protruding height as the outdoor guide rail portion 3101. More specifically, the indoor guide rail portion 3103 has an outdoor rail wall portion 3103a, an indoor rail wall portion 3103b, and an end wall portion 3103c that connects the lower ends of the outdoor rail wall portion 3103a and the indoor rail wall portion 3103b in the front direction. The length in the front direction of the outdoor rail wall portion 3103a is shorter than the length in the front direction of the indoor rail wall portion 3103b.

[0036] The outdoor rail wall portion 3103a is arranged parallel to the guide rail 314a and protrudes further downward from the lower end of the guide rail 314a. The upper end of the outdoor rail wall portion 3103a is provided with an outdoor engaging portion 3103d, which is formed in a hook shape toward the outdoor side X1. The outdoor engaging portion 3103d engages from the indoor side X2 with an engaging projection 314a2 provided on the lower end of the guide rail 314a so as to protrude toward the indoor side X2. The outdoor rail wall portion 3103a is arranged flush with the side surface of the outdoor side X1 of the guide rail 314a so as to extend the guide rail 314a downward.

[0037] The indoor rail wall portion 3103b is positioned parallel to the guide rail 314a and the outdoor rail wall portion 3103a, slightly separated from the guide rail 314a on the indoor side X2. An overhang portion 3103e is integrally provided at the upper end of the indoor rail wall portion 3103b, extending toward the outdoor side X1. The overhang portion 3103e is positioned parallel to the lower surface 312c of the indoor frame member 312, and is in contact with or close to the lower surface 312c. The tip of the overhang portion 3103e on the outdoor side X1 is fitted from the indoor side X2 into an engagement groove 314a1 provided on the indoor side X2 of the base of the guide rail 314a. The lower end of the indoor rail wall portion 3103b is positioned at the same location as the lower end of the outdoor rail wall portion 3103a.

[0038] The end wall portion 3103c is positioned slightly above the lower ends of the outdoor rail wall portion 3103a and the indoor rail wall portion 3103b. As a result, a groove 3103f, similar to the groove 3101f of the outdoor guide rail portion 3101, is formed on the lower surface of the end wall portion 3103c along the length of the indoor guide rail portion 3103. The groove 3103f is sealed by fitting a sealing material 3103g made of resin or rubber.

[0039] The indoor-side cover portion 3104 extends from near the upper end portion of the indoor-side rail wall portion 3103b toward the indoor side X2. The indoor-side cover portion 3104 is spaced a distance downward from the underside 312c of the indoor-side frame member 312, and substantially shields the underside 312c of the indoor-side frame member 312 closer to the indoor side X2 than the indoor-side rail wall portion 3103b. An indoor-side engaging portion 3104a formed in a hook shape toward the indoor side X2 is provided at the end portion of the indoor-side cover portion 3104 on the indoor side X2. The indoor-side engaging portion 3104a engages, from the outdoor side X1, with the lower end portion of a protruding piece 312d extending downward from the end face 312b of the indoor side X2 of the indoor frame member 312. The indoor-side cover part 3104 prevents the outside air temperature transmitted from the existing upper frame 21 side to the new upper frame 31 from being transmitted to the inner periphery of the indoor side X2 beyond the guide rail 314a of the new upper frame 31. An angle member 319, which will be described later, is integrally provided at the end of the indoor side X2 of the indoor-side cover part 3104.

[0040] The new upper frame 31 of the new frame 3, assembled on all four sides of a rectangle, is positioned on the inner periphery of the section extending from the existing upper frame 21 to the frame member 101. The exterior frame member 311 of the new upper frame 31 is positioned below the existing upper frame 21. The interior frame member 312 of the new upper frame 31 is positioned below the frame member 101. As shown in FIG. 4 , if a gap is formed between the new upper frame 31 and the frame member 101, a spacer member 301 is positioned to fill the gap. The spacer member 301 is composed of one or more sheets. The thickness of the sheets constituting the spacer member 301 and the number of layers of the sheets are appropriately determined depending on the size of the gap between the interior frame member 312 of the new upper frame 31 and the frame member 101, etc. The upper surface 312a, mounting portion 318, and connecting member 313 of the interior frame member 312 abut and overlap the spacer member 301. The new upper frame 31 is fixed to the building skeleton 100 on the indoor side X2, closer to the existing upper frame 21, by a screw SC1 that passes through the mounting portion 318 and spacer member 301 from the indoor side X2. The screw SC1 passes through a pair of protrusions 3181 of the mounting portion 318. The pair of protrusions 3181 abut against the spacer member 301, and suppress deformation of the mounting portion 318 when the tightening torque of the screw SC1 is applied.

[0041] When the new frame 3 is attached to the inner periphery of the existing frame 2, no attachment members for the new upper frame 31 are interposed between the existing upper frame 21 and the new upper frame 31. The new upper frame 31 is positioned so that it directly faces the inner periphery of the existing upper frame 21 from top to bottom. Therefore, the new upper frame 31 can be positioned as close as possible to the existing upper frame 21. Because the new upper frame 31 is not fixed to the existing upper frame 21, even if distortion or other issues occur in the existing upper frame 21, it can be attached without being affected by the state of the distortion. Because the screw SC1 does not come into contact with the existing upper frame 21, heat is not transferred between the existing upper frame 21 and the indoor frame member 312 of the new upper frame 31 via the screw SC1.

[0042] A resin angle member 319 is attached to the indoor-side frame member 312 of the new upper frame 31. As shown in FIG. 5, the angle member 319 has an angle portion 319a extending toward the indoor-side X2 and a standing wall portion 319b extending upward from the end of the angle portion 319a on the outdoor-side X1 side. The standing wall portion 319b is integrally connected to the end of the indoor-side X2 side of the indoor-side cover portion 3104 and is arranged so that it is continuous with the end face 312b and protruding piece 312d on the indoor-side X2 side of the indoor-side frame member 312 and extends the end face 312b and protruding piece 312d downward. The angle portion 319a extends from the lower end of the standing wall portion 319b toward the indoor-side X2 side and covers the mounting portion 318 from below. The angle portion 319a is arranged at a position approximately equal to the lower ends of the outdoor-side guide rail portion 3101 and the indoor-side guide rail portion 3103. The angle member 319 may be provided separately from the indoor side cover part 3104 at a position corresponding to the protruding piece 312d.

[0043] Next, the new lower frame 32 will be described.

[0044] The new sill 32 extends left and right along the length of the existing sill 22. The new sill 32 has a length in the projection direction that extends from the guide rail 211c of the existing sill 22 to near the center of the frame member 101 in the projection direction. The new sill 32 is composed of a frame member main body 32A and a resin rail member 32B. The rail member 32B covers the upper side of the frame member main body 32A, and the lower sill members 41B2 and 42B2 of the shoji screens 41 and 42 (described later) are positioned so as to straddle the rail member 32B (outdoor guide rail portion 3201, indoor guide rail portion 3203) and sandwich the rail member 32B (outdoor guide rail portion 3201, indoor guide rail portion 3203) from the indoor / outdoor direction, thereby guiding the sliding movement of the shoji screens 41 and 42.

[0045] The frame member main body 32A is divided into two parts in the front direction: an outdoor frame member 321 and an indoor frame member 322. The outdoor frame member 321 and the indoor frame member 322 are both metal frame members, and are each made of extruded shapes extruded in the longitudinal direction from a metal material such as aluminum. The outdoor frame member 321 and the indoor frame member 322 are integrally connected by a connecting member 323. The connecting member 323 is made of a thermally insulating material such as resin, and blocks heat transfer from the outdoor frame member 321 to the indoor frame member 322 in the new lower frame 32.

[0046] The frame member main body 32A has guide rails 324a, 324b, and 324c that protrude upward corresponding to the guide rails 314a, 314b, and 314c of the new upper frame 31. The guide rail 324a on the innermost side X2 is arranged adjacent to the connecting member 323 at the outermost side X1 on the upper surface 322a of the indoor frame member 322. The guide rail 324b is arranged near the center in the projection direction on the upper surface 321a of the outdoor frame member 321. The guide rail 324c is arranged at the outermost side X1 on the upper surface 321a of the outdoor frame member 321.

[0047] 6 and 7, the outdoor frame member 321 has a hollow portion 3211 that bulges downward to fit the shape of the existing lower frame 22. The indoor frame member 322 has a hollow portion 3221 that has a generally rectangular cross section and extends from the connecting member 323 toward the indoor side X2. A step portion 3222 that is recessed upward is formed in the portion of the underside 322c of the indoor frame member 322 facing the outdoor side X1.

[0048] As shown in FIG. 6, a height-adjusting member 325 is attached to the exterior side X1 of the new lower frame 32. The height-adjusting member 325 extends downward from the new lower frame 32 and is placed on the upper surface 22a between the guide rails 221b, 221c of the existing lower frame 22. By adjusting the height-adjusting member 325, the height of the exterior side X1 of the new lower frame 32 is adjusted. A decorative member 326 made of a metal material such as aluminum is attached to the side surface of the exterior side X1 of the new lower frame 32 so as to be detachable from the exterior side X1. The decorative member 326 covers the height-adjusting member 325 and extends downward in the view direction beyond the existing lower frame 22, forming the view surface of the new lower frame 32. The decorative member 326 conceals the view surface of the exterior side X1 of the existing lower frame 22 and the sealant 104 exposed between the existing lower frame 22 and the exterior wall material 102 from the view surface X1.

[0049] An attachment portion 327 for fixing the new lower frame 32 to the building skeleton 100 is integrally formed at the portion of the new lower frame 32 closest to the indoor side X2. The attachment portion 327 extends in a plate shape from the lower part of the end face 322b of the indoor side frame member 322 on the indoor side X2 toward the indoor side X2.

[0050] At least a pair of protrusions 3271 extending in the longitudinal direction of the new lower frame 32 are provided on the lower surface 327a of the mounting portion 327. The pair of protrusions 3271 protrude slightly downward from the lower surface 327a of the mounting portion 327 and are arranged parallel to each other at a predetermined interval in the projection direction.

[0051] The rail member 32B is attached to the frame member body 32A along its entire length in the longitudinal direction, so as to cover the upper surface of the frame member body 32A, specifically from the upper surface 321a of the outdoor frame member 321 to the upper surface 322a of the indoor frame member 322. In this embodiment, the rail member 32B is divided into two resin rail members 32B1 and 32B2, which correspond to the pair of guide rails 324a and 324b of the frame member body 32A, respectively.

[0052] As shown in Figure 7, the rail member 32B1, which is positioned on the outdoor side X1, is attached to the upper surface 321a of the outdoor frame member 321 of the frame member body 32A. The rail member 32B1 has an outdoor guide rail portion 3201 and an outdoor cover portion 3202 that extends integrally from the outdoor guide rail portion 3201 toward the indoor side X2. The outdoor guide rail portion 3201 is the lower frame side rail positioned on the outdoor side of the newly installed lower frame 32.

[0053] The outdoor guide rail section 3201 has a rail width that is sufficiently larger in the depth direction than the guide rail 324b and protrudes upward from the guide rail 324b. Specifically, the outdoor guide rail section 3201 has an outdoor rail wall section 3201a, an indoor rail wall section 3201b, an upper end wall section 3201c that connects the upper ends of the outdoor rail wall section 3201a and the indoor rail wall section 3201b in the depth direction, and a lower end wall section 3201d that connects the lower ends of the outdoor rail wall section 3201a and the indoor rail wall section 3201b in the depth direction, and is formed in a vertically elongated hollow shape with a substantially rectangular cross-section.

[0054] The outdoor rail wall portion 3201a is disposed parallel to the guide rail 324b and abuts against the guide rail 324b from the indoor side X2, with the lower end wall portion 3201d abutting against and placed on the upper surface 321a of the outdoor frame member 321. An outdoor engaging portion 3201e is provided on the side surface of the outdoor rail wall portion 3201a facing the outdoor side X1. The outdoor engaging portion 3201e engages, from the indoor side X2, with an engaging protrusion 324b1 that is provided at the upper end of the guide rail 324b so as to protrude toward the indoor side X2, and accommodates the entire guide rail 324b from the indoor side X2. A portion of the outdoor rail wall portion 3201a that protrudes above the guide rail 324b is disposed flush with the side surface of the guide rail 314b facing the outdoor side X1 so as to extend the guide rail 314b upward.

[0055] Upper end wall 3201c is positioned slightly below the positions of the upper ends of outdoor rail wall 3201a and indoor rail wall 3201b. As a result, groove 3201f surrounded by upper end wall 3201c and the upper ends of outdoor rail wall 3201a and indoor rail wall 3201b is formed on the upper surface of upper end wall 3201c and extends along the length of outdoor guide rail 3201. Guide rail component 3201g made of a metal material such as aluminum is fitted into groove 3201f.

[0056] The reinforcing member 3201h is made of a plate member made of metal such as aluminum. The reinforcing member 3201h is disposed in a hollow portion 3201i formed inside the outdoor guide rail portion 3201 and extends over the entire length of the outdoor guide rail portion 3201. The reinforcing member 3201h abuts along the indoor rail wall portion 3201b. The upper end of the reinforcing member 3201h abuts against the upper end wall portion 3201c, and the lower end of the reinforcing member 3201h abuts against the lower end wall portion 3201d. The outdoor guide rail portion 3201 has protrusions 3201j on the upper end wall portion 3201c and the lower end wall portion 3201d. The upper and lower ends of the reinforcing member 3201h are sandwiched between the protrusions 3201j and the indoor rail wall portion 3201b, respectively, and are held within the hollow portion 3201i. As a result, the outdoor guide rail portion 3201, which is made of resin, is reinforced by the reinforcing member 3201h, improving its strength.

[0057] The outdoor cover portion 3202 extends from near the lower end of the indoor rail wall portion 3201b over the guide rail 324a toward the indoor side X2. The outdoor cover portion 3202 is spaced a distance above the upper surface 321a of the outdoor frame member 321, and substantially shields the outdoor frame member 321 and connecting member 323 on the indoor side X2 beyond the indoor rail wall portion 3201b. An indoor side engaging portion 3202b formed in a hook shape protrudes from the lower surface 3202a of the outdoor cover portion 3202 toward the indoor side X2. The indoor side engaging portion 3202b engages from the outdoor side X1 with an engaging groove 321c formed at the end of the upper surface 321a of the outdoor frame member 321 on the indoor side X2. The outdoor cover portion 3202 suppresses the transmission of outside air temperature from the existing lower frame 22 to the new lower frame 32 to the inner circumference side of the indoor side X2, rather than to the guide rail 324b of the new lower frame 32.

[0058] As shown in Fig. 6, a resin inter-rail cover 3205 is attached to the upper surface of the outdoor cover part 3202. The inter-rail cover 3205 is arranged across the outdoor guide rail part 3201 and the indoor guide rail part 3203 so as to further shield the outdoor cover part 3202. In detail, as shown in Fig. 7, the edge part on the outdoor side X1 of the inter-rail cover 3205 engages with an engagement protrusion 3201b1 protruding from the indoor rail wall part 3201b of the outdoor guide rail part 3201 towards the indoor side X2, and the edge part on the indoor side X2 of the inter-rail cover 3205 engages with an engagement protrusion 324a2 protruding from the guide rail 324a on the indoor side X2 towards the outdoor side X1, thereby achieving attachment. The rail-to-rail cover 3205 further prevents the outside air temperature transmitted from the existing lower frame 22 to the new lower frame 32 from being transmitted to the inner side between the outdoor guide rail portion 3201 and the indoor guide rail portion 3203 of the new lower frame 32, thereby improving the insulation performance of the new lower frame 32.

[0059] The rail member 32B2 arranged on the indoor side X2 is attached to the upper surface 322a of the indoor side frame member 322 of the frame member main body 32A. The rail member 32B2 has an indoor side guide rail portion 3203 and an indoor side cover portion 3204 extending integrally from the indoor side guide rail portion 3203 toward the indoor side X2. The indoor side guide rail portion 3203 protrudes upward from the frame member main body 31A to the same protruding height as the outdoor side guide rail portion 3201. The indoor side guide rail portion 3203 is a lower frame side rail arranged on the indoor side of the new lower frame 32.

[0060] The indoor guide rail section 3203 has the same rail width in the projection direction as the outdoor guide rail section 3201. More specifically, the indoor guide rail section 3203 has an outdoor rail wall section 3203a, an indoor rail wall section 3203b, an upper end wall section 3203c that connects the upper ends of the outdoor rail wall section 3203a and the indoor rail wall section 3203b in the projection direction, and a lower end wall section 3203d that connects the lower ends of the outdoor rail wall section 3203a and the indoor rail wall section 3203b in the projection direction, and is formed in a vertically elongated hollow shape with a substantially rectangular cross section.

[0061] The outdoor rail wall portion 3203a is arranged parallel to the guide rail 324a and abuts against the guide rail 324a from the indoor side X2, while the lower end wall portion 3203d abuts against the upper surface 322a of the indoor frame member 322 and rests on the upper surface 322a. On the outdoor side X1 of the outdoor rail wall portion 3203a, there is an engagement groove 3203e that engages from the indoor side X2 with an engagement projection 324a1 provided on the upper end of the guide rail 324a so as to project toward the indoor side X2, and accommodates the entire guide rail 324a from the indoor side X2. The portion of the outdoor rail wall portion 3203a that projects upward above the guide rail 324a is arranged flush with the outdoor side X1 of the guide rail 324a so as to extend the guide rail 314a upward.

[0062] The upper end wall portion 3203c is positioned slightly below the upper ends of the outdoor rail wall portion 3203a and the indoor rail wall portion 3203b. As a result, a groove portion 3203f is formed along the length of the indoor guide rail portion 3203 on the upper end surface of the outdoor rail wall portion 3203a, surrounded by the upper end wall portion 3203c and the upper ends of the outdoor rail wall portion 3203a and the indoor rail wall portion 3203b. A guide rail component 3203g made of a metal material such as aluminum is fitted and attached to the groove portion 3203f.

[0063] Like the reinforcing member 3201h, the reinforcing member 3203h is made of a plate member made of metal such as aluminum. The reinforcing member 3203h is disposed in a hollow portion 3203i formed inside the indoor-side guide rail portion 3203, and extends over the entire length of the indoor-side guide rail portion 3203. The reinforcing member 3203h abuts along the indoor-side rail wall portion 3203b. The upper end of the reinforcing member 3203h abuts against the upper end wall portion 3203c, and the lower end of the reinforcing member 3203h abuts against the lower end wall portion 3203d. The indoor-side guide rail portion 3203 is provided with protrusions 3203j on each of the upper end wall portion 3203c and the lower end wall portion 3203d. The upper and lower ends of the reinforcing member 3203h are sandwiched between the protrusion 3203j and the indoor rail wall portion 3203b, respectively, and are held in the hollow portion 3203i, whereby the indoor guide rail portion 3203, which is a resin member, is reinforced by the reinforcing member 3203h, improving its strength.

[0064] The indoor-side cover portion 3204 extends from the lower end of the indoor-side rail wall portion 3203b toward the indoor side X2. The indoor-side cover portion 3204 is spaced above the upper surface 322a of the indoor-side frame member 322, and substantially shields the upper surface 322a of the indoor-side frame member 322 on the indoor side X2 more than the indoor-side rail wall portion 3203b. An indoor-side engaging portion 3204a is provided at the lower part of the end portion of the indoor side X2 of the indoor-side cover portion 3204. The indoor-side engaging portion 3204a engages from the outdoor side X1 with an engaging protrusion 322d1 provided at the base of a protruding piece 322d extending upward from the end surface 322b of the indoor side X2 of the indoor frame member 322. The engaging protrusion 322d1 protrudes toward the outdoor side X1. The indoor-side cover part 3204 prevents the outside air temperature transmitted from the existing lower frame 22 side to the new lower frame 32 from being transmitted to the inner periphery of the indoor side X2 beyond the guide rail 314a of the new lower frame 32. An angle member 328, which will be described later, is integrally provided at the end of the indoor side X2 of the indoor-side cover part 3204.

[0065] As shown in Fig. 6, a resin cover material 3206 is attached to the upper surface of the indoor-side cover portion 3204. The cover material 3206 is arranged across the indoor-side guide rail portion 3203 and the angle member 328 (described later) so as to further shield the indoor-side cover portion 3204. In detail, as shown in Fig. 7, the edge portion on the outdoor side X1 of the cover material 3206 engages with an engagement protrusion 3203b1 that protrudes toward the indoor side X2 from the indoor rail wall portion 3203b of the indoor-side guide rail portion 3203, and the edge portion on the indoor side X2 of the cover material 3206 engages with an engagement protrusion 328b1 that protrudes toward the outdoor side X1 from the upright wall portion 328b of the angle member 328, thereby achieving attachment. The cover material 3206 further suppresses the transmission of outside air temperature from the existing bottom frame 22 to the new bottom frame 32 to the inner circumference of the indoor side X2 rather than the indoor side guide rail portion 3203 of the new bottom frame 32, thereby improving the thermal insulation performance of the new bottom frame 32.

[0066] In the new frame 3 assembled on all four sides into a rectangle, the new lower frame 32 is positioned on the inner periphery of the section extending from the existing lower frame 22 to the frame member 101. The exterior frame member 321 of the new lower frame 32 is positioned above the existing lower frame 22. The interior frame member 322 of the new lower frame 32 is positioned above the frame member 101. The new lower frame 32 is fixed to the building skeleton 100 on the indoor side X2, closer to the existing lower frame 22, by screws SC2 that penetrate the mounting portion 327 from the indoor side X2. The screws SC2 penetrate between a pair of protrusions 3271 of the mounting portion 327. The pair of protrusions 3271 abut against the frame member 101 and suppress deformation of the mounting portion 327 when the tightening torque of the screws SC2 is applied.

[0067] As shown in Figure 6, a spacer member 302 and a support plate 3021 are attached from below with screws 302a into the step 3222 of the indoor-side frame member 322 of the new lower frame 32, filling the gap with the frame member 101. The spacer member 302 is composed of one or more sheets. The thickness of the sheets constituting the spacer member 302 and the number of layers of the sheets are appropriately determined depending on the vertical depth of the step 3222 and the size of the gap between the indoor-side frame member 322 of the new lower frame 32 and the frame member 101. The support plate 3021 is made of a plate material such as metal, fiber-reinforced resin such as CFRP, or PEEK resin, and extends from the indoor-side frame member 322, passing below the connecting member 323, to the outdoor-side frame member 321. An end portion of the support plate 3021 on the outdoor side X1 abuts against a lower surface 321b of a portion of the outdoor frame member 321 adjacent to the connecting member 323, and supports the outdoor frame member 321 from below.

[0068] When the new frame 3 is attached to the inner periphery of the existing frame 2, no attachment members for the new lower frame 32 are interposed between the existing lower frame 22 and the new lower frame 32. The new lower frame 32 is positioned so that it directly faces the inner periphery of the existing lower frame 22 from top to bottom. Therefore, the new lower frame 32 can be positioned as close as possible to the existing lower frame 22. Because the new lower frame 32 is not fixed to the existing lower frame 22, even if distortion or other issues occur in the existing lower frame 22, it can be attached without being affected by the state of the distortion. Because the screws SC2 do not come into contact with the existing lower frame 22, heat is not transferred between the existing lower frame 22 and the indoor frame member 322 of the new lower frame 32 via the screws SC2.

[0069] A resin angle member 328 is attached to the indoor-side frame member 322 of the new lower frame 32. As shown in FIG. 7, the angle member 328 has an angle portion 328a extending toward the indoor-side X2 and a standing wall portion 328b extending downward from the end of the angle portion 328a on the outdoor-side X1 side. The standing wall portion 328b is integrally connected to the end of the indoor-side cover portion 3204 on the indoor-side X2 side and is arranged so that it is continuous with the end face 322b and protruding piece 322d on the indoor-side X2 side of the indoor-side frame member 322 and extends the end face 322b and protruding piece 322d upward. The angle portion 328a extends from the upper end of the standing wall portion 328b toward the indoor-side X2 side and covers the mounting portion 327 from above. The angle portion 328a of the angle member 328 is positioned at approximately the same location as the upper ends of the outdoor guide rail portion 3201 and the indoor guide rail portion 3203. The angle member 328 may be provided separately from the indoor cover portion 3204 in the portion corresponding to the protruding piece 322d.

[0070] Next, the newly installed vertical frames 33 will be described. The left and right newly installed vertical frames 33 have substantially the same structure, except that they are symmetrical. Therefore, the common components of the left and right newly installed vertical frames 33 will be described using the same reference numerals.

[0071] The new vertical frame 33 extends vertically along the length of the existing vertical frame 23. The new vertical frame 33 has a length in the projection direction that extends from the end of the existing vertical frame 23 on the exterior side X1 to near the center of the frame member 101 in the projection direction. The new vertical frame 33 is composed of a frame member main body 33A and a resin rail member 33B. The rail member 33B covers the inner side of the frame member main body 33A, and the vertical stile members 41B3 and 42B3 of the shoji screens 41 and 42 (described later) are arranged to straddle the rail member 33B (the exterior guide rail portion 3301 and the interior guide rail portion 3302) and sandwich the rail member 33B (the exterior guide rail portion 3301 and the interior guide rail portion 3302) from the indoor / outdoor direction, thereby guiding the sliding movement of the shoji screens 41 and 42.

[0072] The frame member main body 33A is divided into two parts in the front direction: an outdoor frame member 331 and an indoor frame member 332. The outdoor frame member 331 and the indoor frame member 332 are both metal frame members, and are each made of extruded shapes extruded in the longitudinal direction from a metal material such as aluminum. The outdoor frame member 331 and the indoor frame member 332 are integrally connected by a connecting member 333. The connecting member 333 is made of a material with insulating properties such as resin, and blocks heat transfer from the outdoor frame member 331 to the indoor frame member 332 in the new vertical frame 33.

[0073] The position of the connecting member 333 in the new vertical frame 33 in the projection direction coincides with the positions of the connecting members 313, 323 in the new upper frame 31 and the new lower frame 32 in the projection direction. The upper and lower ends of the connecting member 333 are arranged in contact with or close to the left and right ends of the connecting members 313, 323 of the new upper frame 31 and the new lower frame 32. The connecting members 313, 323, 333 are substantially continuous around the four periphery of the new frame 3.

[0074] As shown in Figures 8 to 11, the outdoor frame member 331 has a hollow portion 3311 with a substantially rectangular cross section. The indoor frame member 332 has a hollow portion 3321 with a substantially rectangular cross section. The outer surface 331a of the outdoor frame member 331 corresponding to the hollow portion 3311 and the outer surface 332a of the indoor frame member 332 corresponding to the hollow portion 3321 are both flat surfaces and are arranged flush with each other in the projection direction of the new vertical frame 33. The connecting member 333 does not protrude outward beyond these outer surfaces 331a and 332a. The inner surface 331b of the outdoor frame member 331 corresponding to the hollow portion 3311 and the inner surface 332b of the indoor frame member 332 corresponding to the hollow portion 3321 are both flat surfaces and are arranged flush with each other in the projection direction of the new vertical frame 33. The connecting member 333 does not protrude inward beyond these inner surfaces 331b and 332b.

[0075] An outdoor wall portion 334 extending outward in the find direction is integrally formed on the outdoor frame member 331 at the outermost portion X1. The outdoor wall portion 334 protrudes outward in the find direction further than the outer surfaces 331a, 332a of the outdoor frame member 331 and the indoor frame member 332, and is positioned so as to overlap the outermost end face 23a of the existing vertical frame 23 at the outermost portion X1 from the outdoor side X1. A decorative material 335 made of a metal material such as aluminum is attached to the outdoor wall portion 334 so as to be detachable from the outdoor side X1. The decorative material 335 covers the outdoor wall portion 334 and extends outward in the find direction beyond the existing vertical frame 23, forming the find surface of the new vertical frame 33. The decorative material 335 covers and conceals the visible surface of the existing vertical frame 23 on the outside X1 side and the sealing material 104 exposed between the existing vertical frame 23 and the exterior wall material 102 from the outside X1 side.

[0076] An attachment portion 336 used to fix the new vertical frame 33 to the building skeleton 100 is integrally formed at the portion of the new vertical frame 33 closest to the indoor side X2. The attachment portion 336 extends in a plate shape from the end face 332c of the indoor side X2 of the indoor side frame member 332 toward the indoor side X2. The attachment portion 336 is arranged parallel to the outer surfaces 331a, 332a of the outdoor side frame member 331 and the indoor side frame member 332.

[0077] At least a pair of protrusions 3361 extending in the longitudinal direction of the new vertical frame 33 are provided on the outer surface 336a of the mounting portion 336. The pair of protrusions 3361 protrude slightly outward from the outer surface 336a of the mounting portion 336 and are arranged parallel to each other at a predetermined interval in the projection direction. The position of the outer surface 336a of the mounting portion 336 is arranged slightly inward from the positions of the outer surfaces 331a, 332a of the outdoor frame member 331 and the indoor frame member 332. The pair of protrusions 3361 protrude from the outer surface 336a of the mounting portion 336 to a height approximately equal to the positions of the outer surfaces 331a, 332a of the outdoor frame member 331 and the indoor frame member 332.

[0078] At least one fin-shaped water-blocking member 337 is provided on each outer surface 331a of the outdoor frame member 331 of the new vertical frame 33. The water-blocking member 337 extends over the entire length of the new vertical frame 33. The water-blocking member 337 protrudes from the outer surface 331a of the outdoor frame member 331 toward the inner surface 23b of the existing vertical frame 23. The tip of the water-blocking member 337 abuts against the inner surface 23b of the existing vertical frame 23. Therefore, the water-blocking member 337 is positioned so as to prevent rainwater from flowing in the indoor / outdoor direction between the existing vertical frame 23 and the new vertical frame 33. The position of the water-blocking member 337 in the projection direction of the new vertical frame 33 is slightly on the indoor side X2 of the outdoor extension portion 3112 of the new upper frame 31, or is positioned in the same position as the fin member 317 of the new upper frame 31. As a result, rainwater that flows down from both longitudinal ends of the outside extension part 3112 of the new upper frame 31 between the existing vertical frame 23 and the new vertical frame 33 is efficiently drained onto the existing lower frame 22 along the surface of the outside side X1 of the water-blocking member 337. Therefore, by providing this water-blocking member 337 between the existing vertical frame 23 and the new vertical frame 33, rainwater flowing down from the new upper frame 31 is prevented from infiltrating into the inside side X2. Rainwater that has flowed onto the existing lower frame 22 is drained to the outside side X1 from notches (not shown) provided on both the left and right sides of the rail member 32B1 that is furthest outside X1.

[0079] The water-blocking member 337 is formed of an elastic material such as soft resin or rubber. The water-blocking member 337 may also be formed of a hard material such as hard resin or metal. When the water-blocking member 337 is formed of an elastic material, the tip of the water-blocking member 337 elastically abuts against the inner surface 23b of the existing vertical frame 23, sealing the gap between the existing vertical frame 23 and the new vertical frame 33. This effectively prevents rainwater from seeping into the indoor side X2. The water-blocking member 337 formed of an elastic material can bend elastically and is not susceptible to damage even when it comes into contact with the existing vertical frame 23 or the like when the new vertical frame 33 is positioned on the inner periphery of the existing vertical frame 23.

[0080] The rail member 33B is attached to the frame member body 33A along its entire length in the longitudinal direction, so as to cover the inner surface of the frame member body 33A, specifically from the inner surface 331b of the outdoor frame member 331 to the inner surface 332b of the indoor frame member 332.

[0081] 9 and 11, the rail member 33B covers almost the entire area of ​​the frame member main body 33A in the front direction, from the inner surface 331b of the outdoor frame member 331 of the frame member main body 33A to the inner surface 332b of the indoor frame member 332. The rail member 33B has an outdoor guide rail portion 3301, an indoor guide rail portion 3302, and a cover portion 3303 that integrally connects these guide rail portions 3301 and 3302 in the front direction.

[0082] The outdoor guide rail section 3301 and the indoor guide rail section 3302 are arranged at the same position in the forward direction as the outdoor guide rail sections 3101, 3201 and the indoor guide rail sections 3103, 3203, which are respectively provided on the new upper frame 31 and the new lower frame 32, and have the same rail width in the forward direction as the outdoor guide rail sections 3101, 3201 and the indoor guide rail sections 3103, 3203.

[0083] The outdoor guide rail portion 3301 has an outdoor rail wall portion 3301a, an indoor rail wall portion 3301b, and an inner end wall portion 3301c that connects the inner ends of the outdoor rail wall portion 3301a and the indoor rail wall portion 3301b in the forward direction. The outdoor guide rail portion 3301 is formed in a horizontally elongated hollow shape with a generally rectangular cross section that protrudes inward from the inner surface 3303b of the cover portion 3303. The inner end wall portion 3301c is positioned slightly outward from the inner ends of the outdoor rail wall portion 3301a and the indoor rail wall portion 3301b. As a result, a groove portion 3301d surrounded by the inner end wall portion 3301c and the inner ends of the outdoor rail wall portion 3301a and the indoor rail wall portion 3301b is formed on the inner surface of the inner end wall portion 3301c along the length of the outdoor guide rail portion 3301.

[0084] The indoor guide rail section 3302 includes an outdoor rail wall section 3302a, an indoor rail wall section 3302b, and an inner end wall section 3302c that connects the inner ends of the outdoor rail wall section 3302a and the indoor rail wall section 3302b in the depth direction. The indoor guide rail section 3302 is formed as a horizontally elongated hollow shape with a roughly rectangular cross-section, projecting inward from the inner surface 3303b of the cover section 3303, parallel to the outdoor guide rail section 3301. The inner end wall section 3302c is positioned slightly outward from the inner ends of the outdoor rail wall section 3302a and the indoor rail wall section 3302b. As a result, a groove portion 3302d surrounded by the inner end wall portion 3302c and the inner ends of the outdoor rail wall portion 3302a and the indoor rail wall portion 3302b is formed on the inner surface of the indoor end wall portion 3302c along the longitudinal direction of the indoor guide rail portion 3302.

[0085] The cover portion 3303 has a roughly rectangular hollow shape that is long in the depth direction, and integrally connects the outdoor guide rail portion 3301 and the indoor guide rail portion 3302 on their outer sides. The outer surface 3303a of the cover portion 3303 is a flat surface. The outer surface 3303a of the cover portion 3303 abuts from the middle of the depth direction on the inner surface 331b of the outdoor frame member 331 of the frame member body 33A, via the connecting member 333, to the middle of the depth direction on the inner surface 332b of the indoor frame member 332. The outdoor guide rail portion 3301 is located at the end of the outdoor side X1 on the inner surface 3303b of the cover portion 3303, and the indoor guide rail portion 3302 is located at the end of the indoor side X2 on the inner surface 3303b of the cover portion 3303.

[0086] The cover portion 3303 has an external extension portion 3303c integrally formed on its outer surface 3303a, which extends parallel to the external side X1. The external extension portion 3303c abuts against the inner surface 331b of the external frame member 331. The external end of the rail member 33B on the external side X1 is attached to the external frame member 311 of the frame member body 33A by a screw 3303d that passes through the external extension portion 3303c. Near the base of the external extension portion 3303c on the outer surface 3303a of the cover portion 3303, an external engagement groove 3303e is formed to accommodate and engage with the external engagement projection 331c that protrudes from the inner surface 331b of the external frame member 331.

[0087] The cover portion 3303 has an integrally formed indoor extension portion 3303f, which extends parallel to the indoor side X2 from the inner surface 3303b. The indoor extension portion 3303f covers the indoor side X2 end of the inner surface 332b of the indoor frame member 332 at a distance from the inner surface 332b of the indoor frame member 332. The indoor side X2 end of the indoor extension portion 3303f is bent toward the inner surface 332b of the indoor frame member 332 along a protruding piece 322d that extends inward from the end face 322b of the indoor side X2 of the indoor frame member 332, and an integrally formed folded portion 3303g is formed along the inner surface 332b toward the outdoor side X1. The folded portion 3303g has an indoor engagement groove 3303h formed therein that accommodates and engages with the inner end of the protruding piece 322d. The outer end X1 of the folded portion 3303g engages from the indoor side X2 with an indoor engaging projection 332e that protrudes from the inner surface 332b of the indoor frame member 332. The cover portion 3303 prevents the outside air temperature transmitted from the existing vertical frame 23 to the new vertical frame 33 from being transmitted to the inner circumference between the outdoor guide rail portion 3301 and the indoor guide rail portion 3302 of the new vertical frame 33. An angle member 338, described later, is integrally provided at the indoor end X2 of the cover portion 3303.

[0088] As shown in Fig. 8, a resin inter-rail cover 3304 is attached to the inner surface 3303b of the cover portion 3303 of the new vertical frame 33 on the right side when viewed from the outside side X1. The inter-rail cover 3304 is arranged across the outside guide rail portion 3301 and the inside guide rail portion 3302 so as to further shield the cover portion 3303. In detail, the edge portion on the outside side X1 of the inter-rail cover 3304 engages with an engagement protrusion 3301b1 protruding from the inside rail wall portion 3301b of the outside guide rail portion 3301 toward the inside side X2, and the edge portion on the inside side X2 of the inter-rail cover 3304 engages with an engagement protrusion 3302a1 protruding from the outside rail wall portion 3302a of the inside guide rail portion 3302 toward the outside side X1, thereby achieving attachment. The rail-to-rail cover 3304 further prevents the outside air temperature transmitted from the existing vertical frame 23 to the new vertical frame 33 from being transmitted to the inner periphery between the outdoor guide rail portion 3301 and the indoor guide rail portion 3302 of the new vertical frame 33, thereby improving the thermal insulation performance of the new vertical frame 33. Although not shown, a similar rail-to-rail cover 3304 may also be provided on the inner surface 3303b of the cover portion 3303 of the new vertical frame 33 on the left side when viewed from the outdoor side X1.

[0089] In the newly constructed frame 3, which is assembled in a rectangular shape on all four sides, the left and right pairs of newly constructed vertical frames 33 are positioned on the inner circumference side of the portion extending from the existing vertical frame 23 to the frame member 101. The outdoor frame member 331 of the newly constructed vertical frame 33 is positioned inside the existing vertical frame 23. As shown in Figures 8 and 10, if a gap is formed between the newly constructed vertical frame 33 and the frame member 101, a spacer member 303 is positioned to fill that gap. The spacer member 303 is composed of one or more sheets. The thickness of the sheets constituting the spacer member 303 and the number of layers of sheets are appropriately set according to the size of the gap between the indoor frame member 332 of the newly constructed vertical frame 33 and the frame member 101. The outer surface 332a and mounting portion 336 of the indoor frame member 332 abut and overlap with the spacer member 303. The connecting member 333 is positioned inside the spacer member 303. The newly installed vertical frame 33 is fixed to the building structure 100 on the interior side X2 than the existing vertical frame 23 by a screw SC3 that penetrates the mounting portion 336 and the spacer member 303 from the interior side X2. The screw SC3 penetrates between a pair of protruding portions 3361 of the mounting portion 336. The pair of protruding portions 3361 abut against the spacer member 303, suppressing deformation of the mounting portion 336 when the tightening torque of the screw SC3 is applied.

[0090] When the new frame 3 is attached to the inner circumference of the existing frame 2, there is no member interposed between the existing vertical frame 23 and the new vertical frame 33 for attaching the new vertical frame 33. The new vertical frame 33 is positioned so as to face the inner circumference of the existing vertical frame 23 directly from left to right. Therefore, the new vertical frame 33 can be positioned as close as possible to the existing vertical frame 23. Since the new vertical frame 33 is not fixed to the existing vertical frame 23, it can be installed without being affected by the state of distortion in the existing vertical frame 23. Since the screw SC3 does not come into contact with the existing vertical frame 23, no heat is transferred between the existing vertical frame 23 and the indoor side frame member 332 of the new vertical frame 33 via the screw SC3.

[0091] An angle member 338 made of resin is attached to the indoor frame member 332 of the newly installed vertical frame 33. The angle member 338 has an angle portion 338a that extends toward the indoor side X2 and a vertical wall portion 338b that extends outward from the end of the angle portion 338a on the outdoor side X1. The vertical wall portion 338b is positioned to extend inward from the end face 332c and protruding piece 332d of the indoor side X2 of the indoor frame member 332, and the end face 332c and protruding piece 332d are continuous with the end face 332c and protruding piece 332d. The angle portion 338a extends toward the indoor side X2 from the inner end of the vertical wall portion 338b and covers the mounting portion 336 from the inside. The position of the angle portion 338a in the depth direction coincides with the position of the angle portions 319a and 328a of the angle members 319 and 328 of the newly installed upper frame 31 and new lower frame 32 in the depth direction. The position of the angle portion 338a in the viewing direction is arranged at a position substantially equal to the positions in the viewing direction of the inner ends of the outdoor guide rail portion 3301 and the indoor guide rail portion 3203. The angle member 338 may be provided separately from the cover portion 3303 at a location corresponding to the protruding piece 332d.

[0092] As shown in Figures 4, 6, 8, and 10, airtight tapes T1 and T2 made of resin or metal such as aluminum are attached to the indoor side X2 portion of the newly installed frame 3, which is fixed by screws SC1, SC2, and SC3. Airtight tape T1 is attached to the frame member 101. The outdoor side X1 end of airtight tape T1 is attached from the frame member 101 to the outdoor side X1 surface 2b of the wall portion that protrudes furthest inward X2 of the existing frame 2. The indoor side X2 end of airtight tape T1 extends further outward X2 than the existing upper frame 21, existing lower frame 22, and existing vertical frame 23. The outdoor side X1 end of airtight tape T2 covers the mounting portions 318, 327, 336 and the heads of screws SC1, SC2, and SC3. The end of the airtight tape T2 on the indoor side X2 extends further toward the indoor side X2 than the mounting portions 318, 327, 336 and overlaps the airtight tape T1. This improves the airtightness between the existing frame 2 and the new frame 3.

[0093] After the newly installed frame 3 is fixed to the building frame 100, resin decorative covers 51, 52, and 53 are provided around the interior side X2. The decorative covers 51, 52, and 53 are attached to the angle members 319, 328, and 338 by screws 51a, 52a, and 53a. The decorative cover 51 of the newly installed upper frame 31 extends inward towards the interior side X2, continuous with the angle portion 319a of the angle member 319, and is also positioned across the frame member 101. The decorative cover 52 of the newly installed lower frame 32 extends inward towards the interior side X2, continuous with the angle portion 328a of the angle member 328, and is also positioned across the frame member 101. The decorative cover 53 of the newly installed vertical frame 33 extends inward towards the interior side X2, continuous with the angle portion 338a of the angle member 338, and is also positioned across the frame member 101.

[0094] As shown in Figures 4, 6, 8, and 10, the decorative covers 51, 52, and 53 integrally include a rectangular cross-section hollow section 510, 520, and 530 that is flush with the angle sections 319a, 328a, and 338a and positioned on the indoor side X2 of the angle sections 319a, 328a, and 338a, indoor cover walls 511, 521, and 531 that extend from the ends of the indoor side X2 of the hollow section 510, 520, and 530a toward the frame member 101, and fixing sections 512, 522, and 532 that are fixed to the angle members 319, 328, and 338. The side surfaces 510a, 520a, 530a of the hollow portions 510, 520, 530 and the interior cover walls 511, 521, 531 form the interior side X2 facing surfaces of the decorative covers 51, 52, 53.

[0095] The interior cover walls 511, 521, 531 are formed with multiple cutout grooves 511a, 521a, 531a. The cutout grooves 511a, 521a, 531a are formed along the bases of multiple protrusions extending parallel to the length of the decorative covers 51, 52, 53. The multiple cutout grooves 511a, 521a, 531a are arranged parallel to each other at a predetermined interval in the viewing direction. That is, the cutout grooves 511a, 521a of the decorative covers 51, 52 of the new upper frame 31 and the new lower frame 32 are arranged parallel to each other at an interval in the vertical direction. The cutout grooves 531a of the decorative cover 53 of the new vertical frame 33 are arranged parallel to each other at an interval in the horizontal direction. The indoor-side cover walls 511, 521, 531 can be easily cut by sliding a cutter blade along any of the cut grooves 511a, 521a, 531a or by folding them by hand. Therefore, depending on the distance between the angle portions 319a, 328a, 338a of the angle members 319, 328, 338 and the frame member 101, a worker can easily adjust the height of the indoor-side cover walls 511, 521, 531 from the frame member 101 by cutting the indoor-side cover walls 511, 521, 531 at any of the cut grooves 511a, 521a, 531a on site.

[0096] The fixing parts 512, 522, and 532 of the decorative covers 51, 52, and 53 are composed of fixing part bodies 512a, 522a, and 532a that extend from the hollow parts 510, 520, and 530 toward the outdoor side X1, contact plate parts 512b, 522b, and 532b that are provided at the ends of the fixing part bodies 512a, 522a, and 532a toward the outdoor side X1 and extend in the visible direction, and a pair of screw insertion plate parts 512c, 522c, and 532c that protrude from the fixing part bodies 512a, 522a, and 532a toward the back surface of the angle parts 319a, 328a, and 338a. The contact plate portions 512b, 522b, and 532b of the fixing portions 512, 522, and 532 abut against the vertical wall portions 319b, 328b, and 338b of the angle members 319, 328, and 338 from the indoor side X2, defining the position of the decorative covers 51, 52, and 53 in the depth direction. The screws 51a, 52a, and 53a pass through the angle portions 319a, 328a, and 338a, and are screwed into the fixing portion bodies 512a, 522a, and 532a by passing between the pair of screw insertion plate portions 512c, 522c, and 532c. When screws 51a, 52a, and 53a are tightened, the contact plates 512b, 522b, and 532b and the screw insertion plates 512c, 522c, and 532c come into contact with the back surfaces of the angle sections 319a, 328a, and 338a, defining the visible position of the decorative covers 51, 52, and 53. Therefore, the decorative covers 51, 52, and 53 are fixed in the correct position relative to the angle members 319, 328, and 338 without any misalignment.

[0097] The decorative covers 51, 52, and 53, fixed to the angle members 319, 328, and 338, cover the newly installed upper frame 31, lower frame 32, vertical frame 33, and spacer members 301 and 303 between the angle members 319, 328, and 338 and the frame member 101 from the interior side X2. The heads of the screws SC1, SC2, and SC3 are positioned inside the decorative covers 51, 52, and 53. The boundary between the decorative covers 51, 52, and 53 and the frame member 101 is shielded on all four sides by L-shaped trim pieces 61, 62, and 63, which are fixed to the frame member 101 by screws 61a, 62a, and 63a. The ends of the upper and lower trim pieces 61 and 62 are positioned in contact with or close to the upper and lower ends of the vertical trim piece 63. The boundary between trim piece 61 and trim piece 63, and the boundary between trim piece 62 and trim piece 63, are each concealed by corner piece 64.

[0098] Insulation materials 501, 502, and 503 are provided around the perimeter of the decorative covers 51, 52, and 53. The insulation materials 501, 502, and 503 are made of materials that provide insulation, such as extruded polystyrene foam, bead-molded polystyrene, resin materials such as urethane resin, rubber, or vacuum insulation materials. The insulation materials 501, 502, and 503 may be made of different materials from each other. The insulation materials 501, 502, and 503 are housed over the entire length of the newly installed upper frame 31, the newly installed lower frame 32, and the newly installed vertical frame 33, respectively. The ends of each of the insulation materials 501, 502, and 503 are positioned in contact with or close to the ends of other circumferentially adjacent insulation materials 501, 502, and 503. As a result, even though the visible orientation of the newly installed frame 3 of the door 1 is compact, heat transfer between the exterior side X1 and the interior side X2 of the newly installed frame 3 can be further suppressed. Therefore, the thermal insulation performance of the door 1 is improved.

[0099] Next, the shoji screens 41 and 42 will be described.

[0100] Inside the newly installed frame 3, which is attached to the inner circumference of the existing frame 2, shoji screens 41, 42 and a screen door 43 are housed so as to be slidable in the left-right direction. Of these, shoji screens 41 and 42 are made of resin. Specifically, as shown in Figures 2 and 3, shoji screens 41 and 42 consist of metal frame bodies 41A and 42A, which are extruded profiles with a rectangular cross-section and hollow shape made of a metal material such as aluminum, assembled into a rectangular frame around all four sides; resin frame members 41B and 42B that cover the exterior side X1, interior side X2, and outer circumference of the metal frame bodies 41A and 42A around all four sides; and facing materials 410 and 420 such as glass housed inside the metal frame bodies 41A and 42A and the resin frame members 41B and 42B.

[0101] The upper frame members 41B1 and 42B1 of the resin frame members 41B and 42B are provided so as to protrude above the metal frame bodies 41A and 42A, and sandwich the indoor guide rail portion 3103 and the outdoor guide rail portion 3101, which protrude downward from the newly installed upper frame 31, from the indoor and outdoor directions, respectively. As shown in Figure 4, the upper end surfaces of the upper frame members 41B1 and 42B1 are provided with fin-shaped sealing members 401 that seal the gap by elastically contacting the indoor guide rail portion 3103 and the outdoor guide rail portion 3101 from the indoor and outdoor directions.

[0102] As shown in Figure 4, the upper frame members 41B1 and 42B1 sandwich the facing materials 410 and 420 in the indoor-outdoor direction between them and the trim strips 41B11 and 42B11 attached to the upper frame members 41B1 and 42B11. The trim strips 41B11 and 42B11 have fin members 41B12 and 42B12 made of a soft material that elastically adhere to the indoor-side X2 surface of the facing materials 410 and 420. Gaskets 41B13 and 42B13 made of rubber or resin are provided between the upper frame members 41B1 and 42B1 and the outdoor-side X1 surface of the facing materials 410 and 420. The packings 41B13 and 42B13 are attached to the upper frame members 41B1 and 42B1 to prevent damage to the facing material 410 and 420 and to ensure airtightness and watertightness between the upper frame members 41B1 and 42B1 and the facing material 410 and 420.

[0103] The lower frame members 41B2 and 42B2 of the resin frame members 41B and 42B are provided so as to protrude downward from the metal frame bodies 41A and 42A, and sandwich the indoor guide rail section 3203 and the outdoor guide rail section 3201, which protrude upward from the newly installed lower frame 32, from both the indoor and outdoor directions. As shown in Figure 6, the lower end surfaces of the lower frame members 41B2 and 42B2 are provided with fin-shaped sealing members 402 that seal the gap by elastically contacting the indoor guide rail section 3203 and the outdoor guide rail section 3201 from both the indoor and outdoor directions. The rollers 4101 and 4201 provided inside the lower frame members 41B2 and 42B2 are rotatably mounted on the guide rail components 3203g and 3201g of the indoor guide rail section 3203 and the outdoor guide rail section 3201.

[0104] As shown in Figure 6, the lower frame members 41B2 and 42B2 sandwich the facing materials 410 and 420 in the indoor-outdoor direction between them and the trim strips 41B21 and 42B21 attached to the lower frame members 41B2 and 42B2. The trim strips 41B21 and 42B21 have fin members 41B22 and 42B22 made of a soft material that elastically adhere to the indoor-side X2 surface of the facing materials 410 and 420. Gaskets 41B23 and 42B23 made of rubber or resin are provided between the lower frame members 41B2 and 42B2 and the outdoor-side X1 surface of the facing materials 410 and 420. The gaskets 41B23, 42B23 are attached to the lower frame members 41B2, 42B2 to prevent damage to the face materials 410, 420 and ensure airtightness and watertightness between the lower frame members 41B2, 42B2 and the face materials 410, 420.

[0105] As shown in Figures 3 and 10, the vertical frame member 41B3 on the door-edge side of the resin frame member 41B is provided to protrude outward from the metal frame body 41A, and when the shoji screen 41 is fully closed, it sandwiches the indoor guide rail portion 3302, which protrudes inward from the newly installed vertical frame 33 located on the door-edge side of the shoji screen 41, from both the indoor and outdoor directions. The outer end surface of the vertical frame member 41B3 is provided with a fin-shaped sealing member 413 that seals the gap by elastically contacting the indoor guide rail portion 3302 from both the indoor and outdoor directions. As shown in Figure 3, the vertical frame member 41B4 on the door-end side of the resin frame member 41B is provided to protrude outward from the metal frame body 41A.

[0106] As shown in Figures 3 and 8, the vertical frame member 42B3 on the door-edge side of the resin frame member 42B is provided to protrude outward from the metal frame body 42A, and when the shoji screen 42 is fully closed, it sandwiches the outdoor guide rail portion 3301, which protrudes inward from the newly installed vertical frame 33 located on the door-edge side of the shoji screen 42, from both the indoor and outdoor directions. The outer end surface of the vertical frame member 42B3 is provided with a fin-shaped sealing member 403 that seals the gap by elastically contacting the outdoor guide rail portion 3301 from both the indoor and outdoor directions. As shown in Figure 3, the vertical frame member 42B4 on the door-end side of the resin frame member 42B is provided to protrude outward from the metal frame body 42A. When the shoji screens 41 and 42 are fully closed, the vertical frame member 41B4 of shoji screen 41 and the vertical frame member 42B4 of shoji screen 42 are arranged to overlap in the depth direction.

[0107] As shown in Figures 8 and 10, the vertical frame members 41B3 and 42B3 sandwich the facing materials 410 and 420 in the indoor-outdoor direction between them and the trim pieces 41B31 and 42B31 attached to the vertical frame members 41B3 and 42B3. The trim pieces 41B31 and 42B31 have fin members 41B32 and 42B32 made of a soft material that elastically adhere to the indoor-side X2 surface of the facing materials 410 and 420. Gaskets 41B33 and 42B33 made of rubber or resin are provided between the vertical frame members 41B3 and 42B3 and the outdoor-side X1 surface of the facing materials 410 and 420. The packings 41B33, 42B33 are attached to the vertical frame members 41B3, 42B3 to prevent damage to the face materials 410, 420 and ensure airtightness and watertightness between the vertical frame members 41B3, 42B3 and the face materials 410, 420.

[0108] Although one embodiment of the joinery of this disclosure has been described above, the joinery of this disclosure can be modified as appropriate. For example, the joinery of this disclosure is not limited to having the two sliding doors described above. The joinery of this disclosure may have three or more sliding doors, or it may constitute a single sliding window with one sliding door.

[0109] In the fitting 1 described above, the rail member 33B provided on the new vertical frame 33 does not necessarily have to be provided.

[0110] In the above-described joinery 1, the newly constructed upper frame 31, newly constructed lower frame 32, and newly constructed vertical frame 33 that constitute the newly constructed frame 3 each have an insulating structure in which metal frame members divided in the indoor-outdoor direction are connected by connecting members 313, 323, and 333. However, such an insulating structure may be provided in at least one of the upper, lower, left, and right frame members that constitute the newly constructed frame. The new frame 3 does not necessarily have to have a connecting member.

[0111] In the above-mentioned building fixture 1, all frame members on the top, bottom, left and right of the newly constructed frame 3 are arranged so as to face the inner circumferential surface of the existing frame 2 without any other members intervening between them, but the frame members arranged so as to face the inner circumferential surface of the existing frame 2 in this manner may be at least one of the frame members on the top, bottom, left and right.

[0112] In the above-described fitting 1, the insulating materials 501, 502, and 503 are provided in the top, bottom, left, and right frame members of the new frame 3, respectively, but the insulating materials may be provided in at least one of the top, bottom, left, and right frame members of the new frame 3. The new frame 3 does not necessarily have to have the insulating materials 501, 502, and 503.

[0113] The fittings of the present disclosure are not limited to those applied to an existing frame 2 having an existing lower frame 22 formed so that the height gradually decreases from the indoor side X2 to the outdoor side X1, like the fitting 1 described above. The fittings of the present disclosure can also be applied to the case of renovating an existing frame having an existing lower frame 220 in which a pair of guide rails 221a, 221b protrude at the same height, as shown in Figure 12.

[0114] In the above-described fitting 1, an example was shown in which shoji screens 41, 42 each containing face materials 410, 420 made up of two layers of glass were attached to a new frame 3, but the glass that makes up the face materials 410, 420 is not limited to two layers and may be three layers, for example. Figures 13 and 14 show fitting 1 in which shoji screens 41, 42 each containing face materials 410, 420 made up of three layers of glass are slidably attached to a new frame 3 having the same configuration as Figures 2 and 3.

[0115] Figures 15 and 16 show a fitting 1A according to the second embodiment. This fitting 1A is configured so that a new frame 3 can be fitted into the existing frame 2 from the indoor side X2. In Figures 15 and 16, parts with the same reference numerals as those in the fitting 1 according to the first embodiment indicate parts with the same configuration, and therefore their explanations will be cited from the explanations for the fitting 1 and may be omitted below. The new lower frame of the fitting 1A has the same configuration as the new lower frame 32 of the fitting 1.

[0116] The newly installed upper frame 31Y1 in the door / window 1A is composed of a frame member body 31A, a rail member 31B, and a newly installed upper frame division portion 34 arranged on the outer periphery of the frame member body 31A. The frame member body 31A in the door / window 1A does not have an exterior wall portion 315 which is integrally present in the frame member body 31A of the door / window 1. Therefore, the frame member body 31A does not have an extended plate portion that extends outward beyond the upper surface 311a of the exterior frame member 311.

[0117] The newly installed upper frame division section 34 is fixed to the existing upper frame 21 via a mounting piece 35. The frame member body 31A is attached to the inner circumference side of the existing upper frame 21 to which the newly installed upper frame division section 34 is fixed. The newly installed upper frame division section 34 is positioned on the upper part of the frame member body 31A, and is positioned between the existing upper frame 21 and the frame member body 31A. The newly installed upper frame division section 34 is made of an extruded profile formed by extruding a metal material such as aluminum in the longitudinal direction, or a bent product made by bending a metal sheet material.

[0118] The newly installed upper frame division section 34 extends in the longitudinal direction of the existing upper frame 21 at the lower part of the existing upper frame 21. The newly installed upper frame division section 34 includes an indoor / outdoor extending plate 341 that extends in the indoor / outdoor direction below the existing upper frame 21. The indoor / outdoor extending plate 341 extends between the existing upper frame 21 and the guide rails 211a and 211b of the existing upper frame 21, below the guide rails 211a and 211b of the existing upper frame 21.

[0119] The indoor-outdoor extending plate 341 integrally has an outdoor extension portion 3412 that extends toward the outdoor side X1 at a position lower than the upper surface 341a of the indoor-outdoor extending plate 341. The outdoor extension portion 3412 also serves as a drainage channel that directs rainwater that has seeped into the upper surface of the newly installed upper frame division portion 34 in a left-right direction without allowing it to flow into the indoor side X2.

[0120] The outermost part X1 of the outdoor extension 3412 is integrally provided with an outdoor upper wall portion 342 extending upward in the visible direction and an outdoor lower wall portion 343 extending downward in the visible direction.

[0121] The outdoor upper wall portion 342 protrudes further upward than the upper surface 341a of the indoor / outdoor extending plate 341, and is arranged so as to overlap, from the outdoor side X1, with the outdoor side surface 211d of the guide rail 211c on the outdoor-most side X1 of the existing upper frame 21. The outdoor upper wall portion 342 is arranged on the outdoor side X1 of the existing upper frame 21, and is arranged along the surface of the existing upper frame 21 on the outdoor side X1.

[0122] The outdoor lower wall portion 343 extends downward from the end of the outdoor extension portion 3412 closest to the outdoor side X1. A gasket 343a is attached to the indoor side X2 surface of the outdoor lower wall portion 343. The upper part of the guide rail 314c that forms the end face of the outdoor side X1 of the frame member main body 31A abuts against the gasket 343a. In this way, the gasket 343a waterproofs the part on the outdoor side X where the frame member main body 31A and the new upper frame divided portion 34 abut.

[0123] The decorative material 316 is detachably attached from the outside side X1 to the new upper frame partition 34. The decorative material 316 covers the outside upper wall portion 342 and the outside lower wall portion 343, and extends upward in the sight direction beyond the existing upper frame 21, forming the sight surface of the outside side X1 of the new upper frame 31. The decorative material 316 conceals the sealant 104 exposed between the existing upper frame 21 and the exterior wall material 102 from the outside side X1.

[0124] An elastic fin member 344 is provided on the outdoor side X1 portion of the upper surface 341a of the indoor-outdoor extending plate 341. The fin member 344 protrudes upward from the upper surface 341a of the indoor-outdoor extending plate 341 so as to be close to the guide rail 211b of the existing upper frame 21.

[0125] Even if rainwater seeps into the new upper frame division 34 between the outdoor upper wall portion 342 and the guide rail 211c of the existing upper frame 21, it flows left and right through the outdoor extension portion 3412 and is drained to the outer periphery of the new vertical frame 33. This prevents rainwater from seeping into the indoor side X2. Even if a large amount of rainwater seeps into the outdoor extension portion 3412, the fin members 344 prevent it from seeing into the indoor side X2. Because the fin members 344 are elastic, even if the new upper frame division 34 comes into contact with the existing upper frame 21 when it is positioned on the inner periphery of the existing upper frame 21, it can bend elastically and there is no risk of damage.

[0126] The newly installed upper frame division section 34 is fixed to the guide rail 211b of the existing upper frame 21 by screws 35b via an L-shaped mounting piece 35.

[0127] As shown in FIG. 17 , the mounting piece 35 has a base portion 351, a contact portion 352, and a screw base portion 353 provided between the base portion 351 and the contact portion 352. The base portion 351 is attached to the upper surface 341a of the indoor-outdoor extending plate 341 and is fixed to the indoor-outdoor extending plate 341 with a screw 34a. The contact portion 352 contacts the guide rail 211b of the existing upper frame 21 from the indoor side X2. The screw base portion 353 is provided to diagonally connect the base portion 351 and the contact portion 352. The surface of the screw base portion 353 is formed to face diagonally downward on the indoor side X2. The mounting piece 35 is formed, for example, from an extruded member formed by extruding a metal material such as aluminum in the longitudinal direction, or a bent product formed by bending a metal plate.

[0128] The new upper frame segment 34 is fixed to the inner periphery of the existing upper frame 21 by a screw 35b that penetrates the screw base 353 of the mounting piece 35 from diagonally below and screws into the guide rail 211b. Although not shown, the indoor / outdoor extension plate 341 of the new upper frame segment 34 has a through-hole formed therein through which the screw 35b can be inserted from the lower side of the new upper frame segment 34 toward the screw base 353.

[0129] In this embodiment, the outdoor upper wall portion 342 is not provided on the frame member body 31A, but on the newly installed upper frame division portion 34. For example, if the outdoor upper wall portion 342 were not provided on the newly installed upper frame division portion 34, but on the frame member body 31A in the same way as the outdoor wall portion 315 of the door 1, the outdoor upper wall portion 342 extending outward (upward) from the frame member body 31A would hit the existing upper frame 21 when assembling the new upper frame 31Y1 to the existing upper frame 21 from the indoor side X2. Therefore, in order to avoid the existing upper frame 21, it would be necessary to insert the new upper frame into the inside of the existing frame 2 while tilting it from the indoor side X2 with the new frame assembled on all four sides, bring it out to the outdoor side X1, and then pull it towards the existing upper frame 21 to attach the new upper frame to the existing upper frame 21. If the newly installed upper frame is extended outwards to the exterior side X1, for example, if there are grilles or shutters installed on the exterior side X1, the newly installed frame may come into contact with the grilles or shutters installed on the exterior side X1.

[0130] In contrast, in this embodiment, the newly installed upper frame 31Y1 is divided into a frame member body 31A, a rail member 31B, and a newly installed upper frame division section 34. An outdoor-side upper wall section 342 is provided on the newly installed upper frame division section 34, and the newly installed upper frame division section 34 is first attached to the existing upper frame 21, and then the newly installed frame 3, which is assembled around all four sides without the newly installed upper frame division section 34, is attached to the inner side of the existing frame 2. This allows the newly installed upper frame to be easily installed from the indoor side X2 without having to tilt it and insert it into the inside of the existing upper frame 21 from the indoor side X2 and then bring it out to the outdoor side X1.

[0131] From a similar perspective, the newly installed vertical frame 33Y1 in the door / window 1A also does not have an extended plate portion that extends outward (in the left and right facing directions) of the frame member body 33A, as shown in Figure 16. In other words, the outdoor frame member 331 of the frame member body 33A does not have an outdoor wall portion 334 that extends outward in the facing direction at the outermost X1 part of the outdoor frame member 331 in the door / window 1.

[0132] Next, the procedure for constructing the fitting 1A will be described. When constructing the fitting 1A, a new frame 3 assembled on all four sides by the new upper frame 31Y1 (frame member main body 31A and rail member 31B), the new lower frame (not shown), and the new left and right vertical frames 33 is prepared in advance without attaching the new upper frame division part 34 to the new frame 3.

[0133] When installing the fitting 1A, first, as shown in Fig. 17, the new upper frame division 34 is fixed to the lower part of the existing upper frame 21 (new frame division fixing process). Specifically, as shown in Fig. 17 and Fig. 18, the new upper frame division 34 is fixed via mounting piece 35 to the guide rail 211b for the existing shoji screen, which is provided on the existing upper frame 21 and protrudes downward, with screws 35a and 35b.

[0134] Next, as shown in Fig. 18, the new frame 3 assembled on all four sides with the new upper frame divided section 34 separated from the new upper frame 31 is tilted so that its lower end (new lower frame side) is positioned on the outside X1 rather than the upper end (new upper frame 31Y1 side), and is fitted into the opening of the existing frame 2 from the indoor side X2 of the existing frame 2. While rotating around the lower end, as shown in Fig. 19, the frame member main body 31A is moved from the indoor side X2 toward the outdoor side X1 against the indoor side X2 surface of the outdoor side lower wall section 343 of the new upper frame divided section 34 fixed to the existing upper frame 21. As a result, the upper part of the guide rail 314c on the outdoor side X1 of the frame member main body 31A abuts against the gasket 343a of the outdoor side lower wall section 343, and is attached to the existing frame 2 (new frame attachment process).

[0135] Here, the new upper frame 31Y1 with the new upper frame partition 34 separated does not have an extension panel portion that protrudes in the viewing direction of the building skeleton 100 on the outside X1, i.e., the outside wall portion 315 of the new upper frame 31 and the outside wall portion 334 of the new vertical frame 33 that were provided on the door frame 1. As a result, the new upper frame 31Y1 and the left and right new vertical frames 33 do not collide with the existing frame 2, so there is no need to once extend the new upper frame 31Y1 side to the outside X1 of the existing frame 2 and pull it to the inside X2 to attach it to the existing frame 2. In other words, the new frame 3 can be easily attached to the existing frame 2 from the inside X2. This improves the workability of the door frame 1A.

[0136] 19, the mounting portion 318 of the new upper frame 31Y1 is fixed to the building skeleton 100 with the screw SC1. At this time, a spacer member 301 is interposed in the gap formed between the mounting portion 318 of the new upper frame 31Y1 and the building skeleton 100.

[0137] Next, as shown in Figure 20, at the outdoor side X1, the decorative material 316 is attached to the outdoor side X1 of the new upper frame partition 34. At the indoor side X2, the decorative cover 51 is attached to the angle member 319 of the new upper frame 31Y1. An L-shaped parting material 61 is attached to the boundary between the decorative cover 51 and the inner surface of the frame member 101. Although not shown, a decorative cover 53 is also attached to the new vertical frame 33Y1 in a similar manner. Heat insulating material may be housed inside the decorative covers 51, 53, similar to the heat insulating materials 501, 503 of the door and window 1.

[0138] Figures 21 to 23 show a fitting 1B according to the third embodiment. This fitting 1B differs from the fitting 1 according to the first embodiment and the fitting 1A according to the second embodiment in the configuration of the rail members. In Figures 21 to 23, parts with the same reference numerals as the fitting 1 according to the first embodiment and the fitting 1A according to the second embodiment indicate parts with the same configuration, and therefore their explanations will be cited from the explanation for the fitting 1 and may be omitted below.

[0139] As shown in Figure 21, in the joinery 1B, the newly installed upper frame 31Y2 is composed of a frame member body 36A and a resin rail member 36B. The rail member 36B covers the lower side of the frame member body 36A, and the upper frame members 41B1 and 42B1 of the sashes 41 and 42 are arranged to straddle the rail member 36B (outdoor guide rail section 3601, indoor guide rail section 3602) and sandwich the rail member 36B (outdoor guide rail section 3601, indoor guide rail section 3602) from both the indoor and outdoor directions, thereby guiding the sliding movement of the sashes 41 and 42.

[0140] The frame member body 36A is divided in the depth direction into an outdoor frame member 361 and an indoor frame member 362. Both the outdoor frame member 361 and the indoor frame member 362 are metal frame members, and each is made of an extruded profile formed by extruding a metal material such as aluminum in the longitudinal direction. The outdoor frame member 361 and the indoor frame member 362 are integrally connected by a pair of upper and lower connecting members 363. The connecting members 363 are made of a material with heat insulating properties such as resin, and block the transfer of heat from the outdoor frame member 361 to the indoor frame member 362 in the frame member body 36A. The frame member body 36A is not provided with guide rails to guide the sliding movement of the sashes 41 and 42.

[0141] The outdoor frame member 361 and the indoor frame member 362 each have hollow sections 3611 and 3621, respectively. The upper surface 361a of the outdoor frame member 361, corresponding to the hollow section 3611, forms an inclined surface that slopes downward from the indoor side X2 towards the outdoor side X1. The upper surface 362a of the indoor frame member 362, corresponding to the hollow section 3621, is a flat surface. The uppermost portion 361a1 of the upper surface 361a of the outdoor frame member 361 is flush with the upper surface 362a of the indoor frame member 362 in the depth direction. The connecting member 363 does not protrude above the portion 361a1 of the upper surface 361a of the outdoor frame member 361 and the upper surface 362a of the indoor frame member 362.

[0142] The outdoor frame member 361 has an outdoor extension 3612 integrally therewith, which extends toward the outdoor side X1 at a position lower than the upper surface 361a of the outdoor frame member 361. The outdoor extension 3612 is disposed at the end of the new upper frame 31Y2 on the outdoor side X1. The outdoor extension 3612 also functions as a drainage groove that channels rainwater that has infiltrated onto the new upper frame 31Y2 in the left-right direction without allowing it to flow into the indoor side X2.

[0143] An outdoor wall portion 364 extending upward in the viewing direction is integrally formed at the outermost X1 portion of the outdoor extension portion 3612. The outdoor wall portion 364 protrudes further upward than the upper surfaces 361a, 362a of the outdoor frame member 361 and the indoor frame member 362, and is positioned so as to overlap, from the outdoor side X1, the outdoor side surface 211d of the outermost X1 guide rail 211c of the existing upper frame 21. The decorative material 316 is attached to the outdoor wall portion 364 in a manner that allows it to be detached from the outdoor side X1.

[0144] An attachment portion 365 for fixing the new upper frame 31Y2 to the building skeleton 100 is integrally formed on the portion of the frame member main body 36A closest to the indoor side X2. The attachment portion 365 is arranged parallel to the upper surface 362a of the indoor side frame member 322, and extends in a plate shape from the upper portion of the end surface 362b of the indoor side frame member 362 on the indoor side X2 toward the indoor side X2. The frame member main body 36A is fixed to the building skeleton 100 with a screw SC1 that passes through the attachment portion 365.

[0145] The rail member 36B extends over the entire length of the frame member main body 36A so as to cover the underside of the frame member main body 36A, specifically, from the underside 361b of the outdoor frame member 361 to the underside 362c of the indoor frame member 362. The rail member 36B is attached to the frame member main body 36A with screws 36a and 36b.

[0146] The rail member 36B has three hollow portions 366a, 366b, and 366c that are adjacently arranged in the indoor-outdoor direction. An upper surface 366d that is formed flush with the three hollow portions 366a, 366b, and 366c in the indoor-outdoor direction is a flat surface. The upper surface 366d is arranged to face from the lower surface 361b of the outdoor frame member 361 to the lower surface 362c of the indoor frame member 362.

[0147] An outer guide rail portion 3601, an inner guide rail 3602, and a screen door guide rail 3603, all made of resin, are integrally provided on a lower surface 366e formed in the indoor / outdoor direction across the three hollow portions 366a, 366b, and 366c, each of which is an upper frame rail that protrudes downward. The outer guide rail portion 3601 protrudes downward from the outer side X1 end of the central hollow portion 366b. The inner guide rail portion 3602 protrudes downward from the inner side X2 end of the central hollow portion 366b. The screen door guide rail 3603 protrudes downward from the outer side X1 end of the outermost hollow portion 366a at X1. At the end of the hollow portion 366c on the indoor side X2, which is the innermost side X2, there is integrally formed an indoor side protruding portion 3604 made of resin that protrudes downward further than the outdoor side guide rail portion 3601, the indoor side guide rail 3602 and the screen door guide rail 3603.

[0148] An attachment portion 367 is integrally formed at the end of the rail member 36B on the innermost side X2. The attachment portion 367 extends in a plate shape from the upper end of the hollow portion 366c on the innermost side X2 toward the inner side X2.

[0149] The frame member body 36A and the rail member 36B are fixed together by screws 36a on the outdoor side X1 and by screws 36b on the indoor side X2, with the upper surface 366d of the rail member 36B, which spans the three hollow portions 366a, 366b, and 366c of the rail member 36B facing the lower surfaces 361b, 361c of the frame member body 36A. Screws 36a are screwed in from above the outdoor extension portion 3612 of the frame member body 36A, penetrating the upper surface 366d toward the hollow portion 366a of the outdoor side X1 of the rail member 36B. Screws 36b are screwed in from below the indoor side X2 of the rail member 36B, diagonally upward, penetrating the mounting portion 367 and the lower surface 362c of the indoor frame member 362 of the frame member body 36A.

[0150] The angle member 319, which is disposed on the indoor side X2 of the new upper frame 31Y2, is provided separately from the rail member 36B. The angle member 319 is attached with a screw 319c to a hollow portion 366c on the indoor side X2 of the rail member 36B, with the vertical wall portion 319b abutting from the indoor side X2.

[0151] As shown in Figure 22, in the joinery 1B, the newly installed lower frame 32Y2 is composed of a frame member body 37A and a resin rail member 37B. The rail member 37B covers the upper side of the frame member body 37A, and the lower frame members 41B2 and 42B2 of the sashes 41 and 42 are positioned so as to straddle the rail member 37B (outdoor guide rail section 3701, indoor guide rail section 3702) and sandwich the rail member 37B (outdoor guide rail section 3701, indoor guide rail section 3702) from both the indoor and outdoor directions, thereby guiding the sliding movement of the sashes 41 and 42.

[0152] The outdoor guide rail section 3701 and the indoor guide rail section 3702 are lower frame side rails. The outdoor guide rail section 3701 and the indoor guide rail section 3702 each have hollow sections 3701a and 3702a, respectively. Reinforcing members 3701b and 3702b, made of metal plate members, are arranged in the hollow sections 3701a and 3702a, respectively. The reinforcing members 3701b and 3702b extend along the entire length of the outdoor guide rail section 3701 and the indoor guide rail section 3702. The reinforcing members 3701b and 3702b are held within the hollow sections 3701a and 3702a, similar to the reinforcing members 3201h and 3203h shown in Figure 7.

[0153] The frame member body 37A is divided in the depth direction into an outdoor frame member 371 and an indoor frame member 372. Both the outdoor frame member 371 and the indoor frame member 372 are metal frame members, and each is made of an extruded profile formed by extruding a metal material such as aluminum in the longitudinal direction. The outdoor frame member 371 and the indoor frame member 372 are integrally connected by a pair of upper and lower connecting members 373. The connecting members 373 are made of a material with heat insulating properties such as resin, and block the transfer of heat from the outdoor frame member 371 to the indoor frame member 372 in the frame member body 37A. The frame member body 37A is not provided with guide rails to guide the sliding movement of the sashes 41 and 42.

[0154] The outdoor frame member 371 has two hollow sections 3711 and 3712, starting from the outdoor side X1. The indoor frame member 372 has two hollow sections 3721 and 3722, starting from the outdoor side X1. The upper surface 371a of the outdoor frame member 371, spanning the hollow sections 3711 and 3712, is a flat surface that is flush with the interior in the interior-exterior direction. The upper surface 372a of the indoor frame member 372, spanning the hollow sections 3721 and 3722, is a flat surface that is flush with the interior in the interior-exterior direction. The connecting member 373 does not protrude above the upper surface 371a of the outdoor frame member 371 and the upper surface 372a of the indoor frame member 372.

[0155] An outdoor wall portion 374 extending downward is integrally provided at the outdoor end X1 of the outdoor frame member 371. The height adjustment member 325 of the newly installed lower frame 32Y2 is attached to the lower end of the outdoor wall portion 374. The decorative material 326 is detachably attached to the outdoor wall portion 374 from the outdoor X1.

[0156] An attachment portion 375 for fixing the new lower frame 32Y2 to the building skeleton 100 is integrally formed on the portion of the frame member main body 37A closest to the indoor side X2. The attachment portion 375 is arranged parallel to the underside 372c of the indoor side frame member 372, and extends in a plate shape from the lower part of the end face 372b of the indoor side frame member 372 on the indoor side X2 toward the indoor side X2. The frame member main body 37A is fixed to the building skeleton 100 with a screw SC2 that passes through the attachment portion 375.

[0157] The rail member 37B extends along the entire length of the frame member body 37A so as to cover the upper surface of the frame member body 37A, specifically from the upper surface 371a of the outdoor frame member 371 to the upper surface 372a of the indoor frame member 372. The rail member 37B is attached to the frame member body 37A by screws 37a and 37b.

[0158] The rail member 37B has three hollow portions 376a, 376b, and 376c that are adjacent to each other in the indoor-outdoor direction. A lower surface 376d that is formed flush with the three hollow portions 376a, 376b, and 376c in the indoor-outdoor direction is a flat surface. The lower surface 376d is disposed so as to face from an upper surface 371a of the outdoor frame member 371 to an upper surface 372a of the indoor frame member 372.

[0159] An outdoor-side guide rail portion 3701, an indoor-side guide rail 3702, and a screen door guide rail 3703, all of which are made of resin and protrude upward, are integrally provided on an upper surface 376e formed in the indoor / outdoor direction across the three hollow portions 376a, 376b, and 376c. The outdoor-side guide rail portion 3701 protrudes upward from the outdoor-side X1 end of the central hollow portion 376b. The indoor-side guide rail portion 3702 protrudes upward from the indoor-side X2 end of the central hollow portion 376b. The screen door guide rail 3703 protrudes upward from the outdoor-side X1 end of the outermost hollow portion 376a on the outdoor side X1. At the end of the hollow portion 376c on the indoor side X2, which is closest to the indoor side X2, there is integrally provided an indoor side protruding portion 3704 made of resin which protrudes upward further than the outdoor side guide rail portion 3701, the indoor side guide rail 3702 and the screen door guide rail 3703.

[0160] An attachment portion 377 is integrally formed at the end of the rail member 37B on the innermost side X2. The attachment portion 377 extends in a plate shape from the lower end of the hollow portion 376c on the innermost side X2 toward the inner side X2.

[0161] A core member 378 is housed inside the central hollow portion 376b of the rail member 37B. The core member 378 may be an extruded member formed by longitudinally extruding a metal material such as aluminum, a bent product formed by bending a metal plate, or a pultrusion-molded product formed by pultrusion molding containing carbon fiber and a resin such as epoxy. The core member 378 has a core hollow portion 378a with a rectangular cross section and a protruding wall portion 378b protruding from the core hollow portion 378a toward the exterior side X1. The overall outer shape of the core member 378 conforms to the inner surface of the hollow portion 376a of the rail member 37B. The protruding wall portion 378b extends from the upper end surface of the core hollow portion 378a on the exterior side X1 toward the exterior side X1 and is bent downward. The lower end of the downwardly bent protruding wall portion 378b is bent toward the interior side X2.

[0162] The frame member main body 37A and the rail member 37B are fixed by screws 37a on the outside side X1 and by screws 37b on the inside side X2, with the bottom surface 376d of the rail member 37B spanning the three hollow portions 376a, 376b, and 376c facing the top surfaces 371a and 372a of the frame member main body 37A. The screws 37a are threaded from below the frame member main body 37A so as to penetrate through the top surface 371a corresponding to the hollow portion 3711 on the outside side X1 and the bottom surface 376d toward the hollow portion 376a on the outside side X1 of the rail member 37B. An insertion hole 3711a is formed in the bottom surface of the hollow portion 3711 of the frame member main body 37A to allow the screw 37a to be inserted from below. The screw 37b is screwed obliquely downward from above the indoor side X2 of the rail member 37B so as to penetrate through the mounting portion 377 and the upper surface 372a of the indoor side frame member 372 of the frame member main body 37A.

[0163] The angle member 328, which is arranged on the indoor side X2 of the new lower frame 32Y2, is provided separately from the rail member 37B. The angle member 328 is attached to the hollow portion 376c on the indoor side X2 of the rail member 37B with the vertical wall portion 328b abutting from the indoor side X2 by a screw 328c.

[0164] 23, in the fitting 1B, the new vertical frame 33Y2 is composed of a frame member main body 38A and a resin rail member 38B. The rail member 38B covers the inside side of the frame member main body 38A, and the vertical stile members 41B3, 42B3 of the shoji screens 41, 42 straddle the rail member 38B (outdoor guide rail portion 3801, indoor guide rail portion 3802) and are arranged to sandwich the rail member 38B (outdoor guide rail portion 3801, indoor guide rail portion 3802) from the indoor / outdoor direction, thereby guiding the sliding movement of the shoji screens 41, 42.

[0165] The frame member body 38A is divided into two parts in the depth direction: an outdoor frame member 381 and an indoor frame member 382. Both the outdoor frame member 381 and the indoor frame member 382 are metal frame members, and each is made of an extruded profile formed by extruding a metal material such as aluminum in the longitudinal direction. The outdoor frame member 381 and the indoor frame member 382 are integrally connected by a pair of left and right connecting members 383. The connecting members 383 are made of a material with heat insulating properties such as resin, and block the transfer of heat from the outdoor frame member 381 to the indoor frame member 382 in the frame member body 38A.

[0166] The position of the connecting member 383 in the depth direction of the newly installed vertical frame 33Y2 coincides with the position of the connecting members 363 and 373 in the depth direction of the newly installed upper frame 31Y2 and the newly installed lower frame 32Y2. The upper and lower ends of the connecting member 383 are positioned in contact with or close to the left and right ends of the connecting members 363 and 373 of the newly installed upper frame 31Y2 and the newly installed lower frame 32Y2. The connecting members 363, 373 and 383 are substantially continuous around all four sides of the newly installed frame 3.

[0167] The outdoor frame member 381 has a hollow section 3811 with a substantially rectangular cross-section. The indoor frame member 382 has a hollow section 3821 with a substantially rectangular cross-section. The outer surface 381a of the outdoor frame member 381 corresponding to the hollow section 3811 and the outer surface 382a of the indoor frame member 382 corresponding to the hollow section 3821 are both flat surfaces and are arranged flush with the new vertical frame 33Y2 in the depth direction. The connecting member 383 does not protrude outward from these outer surfaces 381a and 382a. The inner surface 381b of the outdoor frame member 381 corresponding to the hollow section 3811 and the inner surface 382b of the indoor frame member 382 corresponding to the hollow section 3821 are both flat surfaces and are arranged flush with the new vertical frame 33Y2 in the depth direction. The connecting member 383 does not protrude inward from these inner surfaces 381b and 382b.

[0168] An outdoor wall portion 384 extending outward in the find direction is integrally formed on the outdoor-most portion X1 of the outdoor frame member 381. The outdoor wall portion 384 protrudes outward in the find direction further than the outer surfaces 381a, 382a of the outdoor frame member 381 and the indoor frame member 382, ​​and is arranged so as to overlap the outdoor-most X1 end face 23a of the existing vertical frame 23 from the outdoor side X1. The decorative material 335 is attached to the outdoor wall portion 384 in a manner that allows it to be detached from the outdoor side X1.

[0169] An attachment portion 385 used to fix the new vertical frame 33Y2 to the building skeleton 100 is integrally formed on the part of the indoor side frame member 382 closest to the indoor side X2. The attachment portion 385 extends in a plate shape from an end face 382c of the indoor side X2 of the indoor side frame member 382 towards the indoor side X2. The attachment portion 385 is arranged parallel to the outer surfaces 381a, 382a of the outdoor frame member 381 and the indoor side frame member 382. The frame member main body 38A is fixed to the building skeleton 100 with screws SC3 that pass through the attachment portion 385.

[0170] The rail member 38B extends over the entire length of the frame member main body 38A so as to cover the inner surface of the frame member main body 38A, specifically, from the inner surface 381b of the outdoor frame member 381 to the inner surface 382b of the indoor frame member 382. The rail member 38B is attached to the frame member main body 38A with screws 38a and 38b.

[0171] The rail member 38B has three hollow portions 386a, 386b, and 386c that are adjacent to each other in the indoor-outdoor direction. An outer surface 386d that is formed flush in the indoor-outdoor direction across the three hollow portions 386a, 386b, and 386c is a flat surface. The outer surface 386d is arranged to face from the inner surface 381b of the outdoor frame member 381 to the inner surface 382b of the indoor frame member 382.

[0172] An inner surface 386e, which is formed in the indoor / outdoor direction across the three hollow sections 386a, 386b, and 386c, is integrally provided with an outdoor guide rail section 3801, an indoor guide rail 3802, and a guide rail 3803 for a screen door, all of which protrude inward and are made of resin. The outdoor guide rail section 3801 protrudes inward from the outdoor side X1 end of the central hollow section 386b. The indoor side guide rail section 3802 protrudes inward from the indoor side X2 end of the central hollow section 386b. The screen door guide rail 3803 protrudes inward from the outdoor side X1 end of the outermost hollow section 386a at X1. At the end of the innermost hollow section 386c of the innermost X2, a resin inner protrusion 3804 is integrally provided, which protrudes inward from the outer guide rail section 3801, the inner guide rail 3802, and the screen door guide rail 3803.

[0173] A mounting portion 387 is integrally formed at the innermost X2 end of the rail member 38B. The mounting portion 387 extends in a plate-like shape toward the inner X2 from the outer end of the hollow portion 386c of the innermost X2.

[0174] The frame member main body 38A and the rail member 38B are fixed with screws 38a on the outside side X1 and with screws 38b on the inside side X2, with the outer surface 386d of the rail member 38B, which covers the three hollow portions 386a, 386b, and 386c, facing the outer surfaces 381b and 382b of the frame member main body 38A. The screws 38a are threaded from the outside of the frame member main body 38A through the inner surface 381b corresponding to the hollow portion 3811 on the outside side X1 and the outer surface 386d toward the hollow portion 386a on the outside side X1 of the rail member 38B. An insertion hole 3811a is formed in the outer surface of the hollow portion 3811 of the frame member main body 38A to allow the screw 38a to be inserted from the outside. The screw 38b is screwed in from the inside of the indoor side X2 of the rail member 38B toward an oblique outward direction, so as to penetrate the mounting portion 387 and the inner surface 382b of the indoor side frame member 382 of the frame member body 38A.

[0175] The angle member 338, which is disposed on the indoor side X2 of the new vertical frame 33Y2, is provided separately from the rail member 38B. The angle member 338 is attached to a hollow portion 386c on the indoor side X2 of the rail member 38B with a vertical wall portion 388b abutting from the indoor side X2 with a screw 388c.

[0176] Figures 24 and 25 show the sill portion and new sill 32X of the fitting 1C according to the fourth embodiment. The parts with the same reference numerals as the sill portion and new sill 32 of the fitting 1 according to the first embodiment shown in Figures 6 and 7 indicate parts with the same configuration, so the detailed description of those parts will be cited from the above description and may be omitted below.

[0177] The new lower frame 32X has a frame member main body 32A which is a metal member, and an outdoor guide rail portion 3201X and an indoor guide rail portion 3203X which are lower frame side rails, and is similar to the new lower frame 32 of the fitting 1 related to the first embodiment in that the outdoor guide rail portion 3201X and the indoor guide rail portion 3203X are respectively made of a metal member and a resin member, but the specific configurations of the outdoor guide rail portion 3201X and the indoor guide rail portion 3203X differ from the outdoor guide rail portion 3201 and the indoor guide rail portion 3203 of the new lower frame 32 of the fitting 1 related to the first embodiment.

[0178] As shown in FIG. 25, the outdoor guide rail portion 3201X is made up of a guide rail 321d made of a metal member, a rail wall portion 321e made of a resin member, and a reinforcing member 321f made of a metal member.

[0179] The guide rail 321d has a rising portion 321d1 that rises upward integrally from the upper surface 321a of the outdoor frame member 321, and an upper end wall portion 321d2 that extends from the upper end of the rising portion 321d1 toward the indoor side X2. A guide rail component 321d3, on which the door rollers 4201 of the shoji screen 42 roll, is integrally provided to protrude upward from the upper end wall portion 321d2.

[0180] The rail wall portion 321e forms the side surface of the guide rail 321d on the indoor side X2. The rail wall portion 321e is integrally formed with the outdoor side X1 end of the outdoor side cover portion 3202 and is arranged parallel to the rising portion 321d1 of the guide rail 321d. The upper end of the rail wall portion 321e engages with the indoor side X2 surface of the upper end engaging claw portion 321d4, which extends downward from the indoor side X2 end of the upper end wall portion 321d2 of the guide rail 321d, from the indoor side X2. As a result, a hollow portion S1 is formed on the inside of the outdoor side guide rail portion 3201X between the guide rail 321d and the rail wall portion 321e.

[0181] The reinforcing member 321f is made of a metal plate such as aluminum. The reinforcing member 321f is positioned in the hollow section S1 formed inside the outdoor guide rail section 3201X and extends along the entire length of the outdoor guide rail section 3201X. The reinforcing member 321f is positioned to face the rail wall section 321e along the hollow section S1 side. The reinforcing member 321f may also be in contact with the rail wall section 321e along the hollow section S1 side.

[0182] The reinforcing member 321f integrally has three engaging portions 321f1, 321f2, and 321f3 that protrude toward the exterior side X1. The engaging portions 321f1, 321f2, and 321f3 are provided along the entire length of the reinforcing member 321f.

[0183] The engaging portion 321f1 is located at the upper end of the reinforcing member 321f. The engaging portion 321f1 engages with the lower end of the upper end engaging claw portion 321d4 of the guide rail 321d by contacting it from below. The upper end portion 321f4 of the reinforcing member 321f, which protrudes above the engaging portion 321f1, is positioned to be sandwiched between the upper end engaging claw portion 321d4 and the rail wall portion 321e.

[0184] The engaging portion 321f2 is disposed in the middle of the reinforcing member 321f in the height direction. The engaging portion 321f2 abuts and engages from above with the middle engaging claw portion 321d5 that extends from the middle of the rising portion 321d1 of the guide rail 321d in the height direction toward the indoor side X2.

[0185] The engagement portion 321f3 is disposed at the lower end of the reinforcing member 321f. The engagement portion 321f3 abuts and engages from above with a lower-end engagement claw 321d6 that protrudes from the upper surface 321a of the outdoor frame member 321 at a position corresponding to below the upper-end engagement claw 321d4 of the guide rail 321d. A lower end 321f5 of the reinforcing member 321f that protrudes below the engagement portion 321f3 is disposed so as to be sandwiched between the lower-end engagement claw 321d6 and the rail wall portion 321e.

[0186] In this way, the reinforcing member 321f of the outdoor guide rail portion 3201X is held by engaging with the guide rail 321d from the indoor side X2 by the engaging portions 321f1, 321f2, and 321f3. In this state, the reinforcing member 321f is not engaged with the rail wall portion 321e. The reinforcing member 321f is arranged along the rail wall portion 321e, thereby reinforcing the rail wall portion 321e, which is made of a resin material. In other words, the load of the shoji screen 42 applied to the outdoor guide rail portion 3201X via the guide rail part 321d3 is received solely by the guide rail 321d and the reinforcing member 321f, and the load due to the load is prevented from being applied to the rail wall portion 321e. Therefore, although the outdoor guide rail portion 3201X includes a resin material, it is reinforced by the reinforcing member 321f, thereby improving its strength.

[0187] As shown in FIG. 25, the indoor guide rail portion 3203X is made up of a guide rail 322e made of a metal member, a rail wall portion 322f made of a resin member, and a reinforcing member 322g made of a metal member.

[0188] The guide rail 322e has a rising portion 322e1 that rises upward integrally from the upper surface 322a of the indoor frame member 322, and an upper end wall portion 322e2 that extends from the upper end of the rising portion 322e1 toward the indoor side X2. A guide rail part 322e3, on which the door rollers 4101 of the shoji screen 41 roll, is integrally provided on the upper end wall portion 322e2 and protrudes upward.

[0189] The rail wall portion 322f forms the side surface of the guide rail 322e on the indoor side X2. The rail wall portion 322f is formed integrally with the end portion of the indoor side cover portion 3204 on the outdoor side X1 and is arranged parallel to the rising portion 322e1 of the guide rail 322e. The upper end portion of the rail wall portion 322f engages, from the indoor side X2, with the indoor side X2 surface of the upper end engagement claw portion 322e4 that extends downward from the indoor side X2 end portion of the upper end wall portion 322e2 of the guide rail 322e. As a result, a hollow portion S2 is formed between the guide rail 322e and the rail wall portion 322f on the inside of the outdoor guide rail portion 3203X.

[0190] The reinforcing member 322g is made of a plate member made of metal such as aluminum. The reinforcing member 322g is disposed in a hollow portion S2 formed inside the outdoor guide rail portion 3203X, and extends over the entire length of the indoor guide rail portion 3203X. The reinforcing member 322g abuts along the rail wall portion 322f.

[0191] The reinforcing member 322g integrally has three engaging portions 322g1, 322g2, and 322g3 that protrude toward the outside side X1. The engaging portions 322g1, 322g2, and 322g3 are provided over the entire length of the reinforcing member 322g.

[0192] The engagement portion 322g1 is disposed at the upper end of the reinforcing member 322g. The engagement portion 322g1 abuts against and engages with the lower end of the upper end engagement claw 322e4 of the guide rail 322e from below. The upper end 322g4 of the reinforcing member 322g, which protrudes above the engagement portion 322g1, is disposed so as to be sandwiched between the upper end engagement claw 322e4 and the rail wall portion 322f.

[0193] The engaging portion 322g2 is disposed in the middle of the reinforcing member 322g in the height direction. The engaging portion 322g2 abuts and engages from above with the middle engaging claw portion 322e5 that extends from the middle of the rising portion 322e1 of the guide rail 322e in the height direction toward the indoor side X2.

[0194] The engagement portion 322g3 is disposed at the lower end of the reinforcing member 322g. The engagement portion 322g3 abuts and engages from above with a lower end engagement claw 322g6 that protrudes from the upper surface 322a of the indoor frame member 322 at a position corresponding to below the upper end engagement claw 322e4 of the guide rail 322e. A lower end 322g5 of the reinforcing member 322g that protrudes below the engagement portion 322g3 is disposed so as to be sandwiched between the lower end engagement claw 322e6 and the rail wall portion 322f.

[0195] In this way, the reinforcing member 322g of the indoor guide rail portion 3203X is held by engaging with the guide rail 322e from the indoor side X2 by the engaging portions 322g1, 322g2, and 322g3. In this state, the reinforcing member 322g is not engaged with the rail wall portion 322f. The reinforcing member 322g is arranged along the rail wall portion 322f, thereby reinforcing the rail wall portion 322f, which is a resin member. In other words, the load of the shoji screen 41 applied to the indoor guide rail portion 3203X via the guide rail part 322e3 is received solely by the guide rail 322e and the reinforcing member 322g, and the load due to the load is prevented from being applied to the rail wall portion 322f. Therefore, although the indoor guide rail portion 3203X includes a resin member, it is reinforced by the reinforcing member 322g, thereby improving its strength.

[0196] The joinery 1C of the above embodiment has the following effects. Specifically, it has a new frame 3 which is a frame body consisting of a new upper frame 31, a new lower frame 32, and a pair of new left and right vertical frames 33 that are installed in an opening in the building frame 100, and sashes 41 and 42 which are slidably housed in a lower frame side rail installed in the new lower frame 32. The lower frame side rail is formed by including a metal member and a resin member, and has reinforcing members 321f and 322g that reinforce the outdoor side guide rail 3201X and the indoor side guide rail 3203X. As a result, the lower frame side rail is reinforced by the reinforcing members 321f and 322g. Therefore, the strength of the lower frame side rail is improved even though it has a resin member.

[0197] In the above embodiment, the outdoor guide rail section 3201X and the indoor guide rail section 3203X, which are the lower frame side rails, have hollow sections S1 and S2 on the inside, and the reinforcing members 321f and 322g are arranged in the hollow sections S1 and S2. As a result, the strength of the lower frame side rail, which is improved in terms of heat insulation and strength by the hollow sections S1 and S2, is further improved by the reinforcing members 321f and 322g.

[0198] In the above embodiment, the reinforcing members 321f and 322g are arranged along the surface of the resin member on the hollow portions S1 and S2 side, thereby enabling the resin member, which has a weak strength, to be effectively reinforced by the reinforcing members 321f and 322g.

[0199] In the above embodiment, the outdoor guide rail portion 3201X and the indoor guide rail portion 3203X, which are the lower frame side rails, have upper end engagement claw portion 321d4, intermediate engagement claw portion 321d5, and lower end engagement claw portion 321d6, and the reinforcing members 321f, 322g have engagement portions 321f1, 321f2, 321f3, 322g1, 322g2, 322g3 that engage with the upper end engagement claw portion 321d4, intermediate engagement claw portion 321d5, and lower end engagement claw portion 321d6. ​​According to this, the reinforcing members 321f, 322g are held by the outdoor guide rail portion 3201X and the indoor guide rail portion 3203X through engagement, so that the reinforcing members 321f, 322g can be easily provided on the outdoor guide rail portion 3201X and the indoor guide rail portion 3203X. Furthermore, since the outdoor guide rail portion 3201X and the indoor guide rail portion 3203X engage with the reinforcing members 321f, 322g at three engagement locations, top and bottom, the reinforcing members 321f, 322g are stably held by the outdoor guide rail portion 3201X and the indoor guide rail portion 3203X.

[0200] In the above embodiment, the reinforcing members 321f and 322g are made of metal. This further improves the strength of the lower frame rail.

[0201] In the above embodiment, the outdoor guide rail portion 3201X and the indoor guide rail portion 3203X, which are the lower frame side rails, have guide rail components 321d3 and 322e3 that contact the door rollers 4101 and 4201 of the shoji screens 41 and 42, and the guide rail components 321d3 and 322e3 are provided integrally with the metal members. This allows the metal members to firmly withstand the load of the shoji screens 41 and 42 that is applied to the guide rail components 321d3 and 322e3.

[0202] In the above embodiments, examples have been given in which the fittings 1, 1A, 1B, and 1C are renovated fittings, but the fittings of the present disclosure are not limited to such renovated fittings and may be fittings installed in the skeleton of a newly constructed building. The fittings of the present disclosure are not limited to sliding windows. The fittings of the present disclosure may be any fittings that have a shoji screen that can slide along a lower frame side rail installed in the lower frame, and may also be single-sliding windows, etc.

[0203] The present disclosure includes building materials according to the following aspects.

[0204] <Aspect 1> a frame body consisting of an upper frame, a lower frame, and a pair of left and right vertical frames provided at an opening in the building skeleton; A shoji screen that is slidably accommodated in a lower frame side rail provided on the lower frame, The lower frame side rail is formed from a metal member and a resin member, and has a reinforcing member that reinforces the lower frame side rail.

[0205] <Aspect 2> The lower frame side rail has a hollow portion on the inside, The fixture according to aspect 1, wherein the reinforcing member is disposed in the hollow portion.

[0206] <Aspect 3> The fitting according to aspect 2, wherein the reinforcing member is arranged along the surface of the resin member facing the hollow portion.

[0207] <Aspect 4> The lower frame rail has a claw portion, The fitting according to any one of aspects 1 to 3, wherein the reinforcing member has an engaging portion that engages with the claw portion.

[0208] <Aspect 5> 5. The fitting according to any one of aspects 1 to 4, wherein the reinforcing member is made of metal.

[0209] <Aspect 6> The lower frame side rail has a guide rail component with which the shoji door roller contacts, The guide rail component is provided integrally with the metal member, as described in any of embodiments 1 to 5. [Explanation of symbols]

[0210] 1C fittings, 3 new frame (frame body), 31 new upper frame (upper frame), 32 new lower frame (lower frame), 33 new vertical frame (vertical frame), 32B rail portion (plastic member), 321e, 322f rail wall portion (plastic member), 321f, 322g reinforcing member, S1, S2 hollow portion, 321d4 upper end engaging claw portion (claw portion), 321d5 intermediate engaging claw portion (claw portion), 321d6 lower end engaging claw portion (claw portion), 321f1, 321f2, 321f3, 322g1, 322g2, 322g3 engaging portion, 3201X outdoor guide rail portion (lower frame side rail), 3203X indoor guide rail portion (lower frame side rail), 321d3,322e3 Guide rail parts, 41,42 Shoji screens, 100 Building frame

Claims

1. a frame body consisting of an upper frame, a lower frame, and a pair of left and right vertical frames provided at an opening in the building skeleton; a shoji screen that is slidably mounted along a lower frame side rail that is mounted on the lower frame; The lower frame side rail is formed from a metal member and a resin member, and has a reinforcing member that reinforces the lower frame side rail.

2. The lower frame side rail has a hollow portion on the inside, The fixture according to claim 1 , wherein the reinforcing member is disposed in the hollow portion.

3. The fixture according to claim 2 , wherein the reinforcing member is arranged along the surface of the resin member facing the hollow portion.

4. The lower frame side rail has a claw portion, The fixture according to any one of claims 1 to 3, wherein the reinforcing member has an engaging portion that engages with the claw portion.

5. The fixture according to any one of claims 1 to 3, wherein the reinforcing member is made of metal.

6. The lower frame side rail has a guide rail component with which the shoji door roller contacts, The fitting according to any one of claims 1 to 3, wherein the guide rail component is integrally formed with the metal member.

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