Remodeling method of double window

Abstract

To provide a remodeling method of double window capable of achieving both effective utilization of glass and performance improvement of an opening part of a building skeleton.SOLUTION: In a remodeling method of double window where a window in which an existing sash having a glass is stored in an existing frame provided at an opening part of a building skeleton is remodeled into a double window having an outer window and an inner window, the glass is removed from the existing sash, a new stile body is mounted on the removed glass and a sash for inner window is constructed, a frame body for inner window is mounted on the indoor side of the existing frame, a sash for outer window is stored utilizing the existing frame, and the sash for inner window is stored in the frame body for inner window.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a method for retrofitting double-glazed windows. [Background technology]

[0002] Conventionally, it has been known to construct a double-glazed window by using an existing window installed in an opening in a building frame as an exterior window and attaching an interior window to the interior side of the exterior window (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2024-6277 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, the useful life of glass is considered to be 10 to 20 years. If a window with a shoji screen whose glass has reached the end of its useful life is to continue using it, the glass will need to be replaced. Meanwhile, in recent years, there has been a demand for the creation of a recycling-oriented society, and the recycling of glass that is discarded when glass is replaced has been advocated.

[0005] The present disclosure aims to provide a method for renovating double-glazed windows that can achieve both effective use of glass and improved performance of openings in building frames. [Means for solving the problem]

[0006] The present disclosure relates to a method for renovating a double-glazed window, which converts a window having an existing shoji screen with glass installed in an existing frame provided in an opening of a building body into a double-glazed window having an exterior window and an interior window, by removing the glass from the existing shoji screen, attaching a new frame to the removed glass to form an interior window shoji screen, attaching an interior window frame body to the interior side of the existing frame, and installing the exterior window shoji screen using the existing frame, and installing the interior window shoji screen in the interior window frame body. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a front view of a double-glazed window according to an embodiment of the present invention as viewed from the outside of the room. [Figure 2] FIG. 2 is a rear view of the double-glazed window according to the present embodiment as viewed from the indoor side. [Figure 3] 1 is a vertical cross-sectional view of a double-glazed window according to an embodiment of the present invention. [Figure 4] 1 is a cross-sectional view of a double-glazed window according to an embodiment of the present invention. [Figure 5] 1 is a vertical cross-sectional view of an existing window to which the double-glazed window renovation method according to this embodiment is applied. [Figure 6] 1 is a cross-sectional view of an existing window to which the double-glazed window renovation method according to this embodiment is applied. [Figure 7] FIG. 1 is a flow chart illustrating a method for renovating a double-glazed window according to an embodiment of the present invention. [Figure 8] 1 is an explanatory diagram illustrating the construction of an inner window shoji screen using glass from an existing shoji screen of a double-glazed window according to this embodiment. [Figure 9] 3 is a cross-sectional view of a frame member used in the double-glazed window according to the present embodiment. FIG. [Figure 10] FIG. 2 is an exploded vertical cross-sectional view showing a method for renovating a double-glazed window according to the present embodiment. [Figure 11] FIG. 2 is an exploded cross-sectional view showing a method for renovating a double-glazed window according to the present embodiment. [Figure 12] 1 is a vertical cross-sectional view showing an enlarged view of the upper frame side of a double-glazed window according to the present embodiment. [Figure 13] 1 is an enlarged vertical cross-sectional view showing the bottom frame side of a double-glazed window according to the present embodiment. FIG. [Figure 14] FIG. 2 is an enlarged vertical cross-sectional view showing one vertical frame side of the double-glazed window according to the present embodiment. [Figure 15] 3 is a vertical cross-sectional view showing an enlarged view of the other vertical frame side of the double-glazed window according to the present embodiment. FIG. [Figure 16] FIG. 10 is a vertical cross-sectional view of a double-glazed window according to another embodiment. [Figure 17] FIG. 10 is a flow chart illustrating a method for renovating a double-glazed window according to another embodiment. [Figure 18] FIG. 10 is a cross-sectional view showing another embodiment of the frame member. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. As shown in Figures 1 to 4, a double-glazed window 1 according to this embodiment comprises an outer window 2 arranged on the outdoor side X1 of an opening 101 in a building skeleton 100, and an inner window 3 arranged on the indoor side X2.

[0009] Here, the directions indicated by the arrows in the figure are defined. The X1-X2 direction indicates the indoor / outdoor direction of the double-glazed window 1. X1 is the outside, and X2 is the inside. The indoor / outdoor direction indicates the front view of the double-glazed window 1. In the double-glazed window 1, the surface that is arranged along the front view direction is called the front view surface. The direction perpendicular to the front view direction indicates the front view of the double-glazed window 1. In the double-glazed window 1, the surface that is arranged along the front view direction and faces the outside view X1 and the inside view X2 of the double-glazed window 1 is called the front view surface. The direction toward the outside of the front view of the double-glazed window 1 is called the outside, and the surface facing outward is called the outer surface. The direction toward the inside of the front view of the double-glazed window 1 is called the inside, and the surface facing inward is called the inner surface.

[0010] The exterior window 2 is formed by renovating an existing window 4 installed in an opening 101 in a building skeleton 100. The exterior window 2 is constructed by attaching a new frame 20 to the inside of an existing frame 40 using a cover construction method, and then fitting an exterior window outer shoji screen 24, an exterior window inner shoji screen 25, and a screen door 26 inside the new frame 20, forming a double sliding window. The screen door 26 is not shown in Figure 1.

[0011] The inner window 3 is a window that is newly attached to the interior side X2 of the outer window 2. A frame member 110 is provided around the four perimeter of the opening 101 on the interior side X2 of the outer window 2. The inner window 3 is composed of a sliding window that houses an outer shoji screen 34 for an inner window and an inner shoji screen 35 for an inner window inside an inner window frame body 30 that is attached to the inner side of the frame member 110 that covers the four perimeters.

[0012] 5 and 6, the existing window 4 before being remodeled into a double-glazed window 1 will be described. The existing window 4 is composed of an existing frame 40, an existing outer shoji screen 44, an existing inner shoji screen 45, and an existing screen door 46. The existing frame 40 is composed of an existing upper frame 41, an existing lower frame 42, and existing left and right vertical frames 43 attached to an opening 101 in a building skeleton 100, which are framed into a rectangular shape.

[0013] The existing upper frame 41 has an exterior guide rail 411, an interior guide rail 412, and a guide rail 413 for the screen door. An upper frame member 111 of the frame members 110 that surround the opening 101 is arranged on the interior side X2 of the existing upper frame 41. The upper frame member 111 is made of a resin or wooden plate with a rectangular cross section. A cutout portion 111a is provided on the exterior-most side X1 of the upper frame member 111. A resin upper angle member 414 is attached within the cutout portion 111a.

[0014] The existing lower frame 42 has an exterior guide rail 421, an interior guide rail 422, and a guide rail 423 for the screen door. A lower frame member 112 of the frame member 110 that surrounds the opening 101 is disposed on the interior side X2 of the existing lower frame 42. The lower frame member 112 is made of a resin or wooden plate with a rectangular cross section. A cutout portion 112a is provided on the exterior-most side X1 of the lower frame member 112. A resin lower angle member 424 is attached within the cutout portion 112a.

[0015] The left and right existing vertical frames 43 each have a shoji projection piece 431 that engages with the existing outer shoji screen 44 and the existing inner shoji screen 45, and a screen projection piece 432 that engages with the existing screen screen 46. A vertical frame member 113 of the frame member 110 that surrounds the opening 101 is arranged on the indoor side X2 of the existing vertical frame 43. The vertical frame member 113 is made of a resin or wooden board with a rectangular cross section. A cutout portion 113a is provided on the outdoor-most side X1 of the vertical frame member 113. A resin vertical angle member 434 is attached within the cutout portion 113a.

[0016] The existing outer shoji screen 44 and the existing inner shoji screen 45 are constructed by fitting double-glazed glass G1, G2 inside existing frames 440, 450, which are constructed by assembling existing upper frames 441, 451, existing lower frames 442, 452, existing door end frames 443, 453, and existing door end frames 444, 454, each made of metal, into a rectangular frame assembly. The double-glazed glass G1, G2 is constructed by arranging two sheets of glass G1a, G2a facing each other with spacers G1b, G2b in between. The existing outer shoji screen 44 is slidably attached between the outdoor guide rails 411, 421 of the existing upper frame 41 and the existing lower frame 42. The existing inner shoji screen 45 is slidably attached between the indoor guide rails 412, 422 of the existing upper frame 41 and the existing lower frame 42.

[0017] Next, a specific method for converting an existing window 4 into a double-glazed window 1 according to this embodiment will be described with reference to Figures 7 to 11. Here, an overview of the method for converting an existing window 4 into a double-glazed window 1 will be described. The specific structure of the double-glazed window 1 after conversion will be described further below.

[0018] When the existing window 4 is converted into a double-glazed window 1, as shown in FIG. 7, first, the existing outer shoji screen 44, the existing inner shoji screen 45, and the existing screen door 46 are removed from the existing frame 40 (step S1).

[0019] In step S1, the existing outer shoji screen 44 and the existing inner shoji screen 45 are removed, and then the double-pane glass G1, G2 of the existing outer shoji screen 44 and the existing inner shoji screen 45 are reused to assemble the outer shoji screen 34 for the inner window and the inner shoji screen 35 for the inner window to be used in the inner window 3 (step S1a).

[0020] 8, the existing upper frames 441, 451, the existing lower frames 442, 452, the existing front frames 443, 453, and the existing rear frames 444, 454 are disassembled from the existing outer shoji screen 44 and the existing inner shoji screen 45, and the double-glazed glass G1, G2 are removed from the existing frames 440, 450. The removed double-glazed glass G1, G2 is then used as is, and new upper frames 341, 351, lower frames 342, 352, front frames 343, 353, and rear frames 344, 354 are assembled around them in a rectangular shape to form the frames 340, 350, thereby forming the outer shoji screen for inner windows 34 and the inner shoji screen for inner windows 35. "Using the double glazing G1, G2 as is" means that no processing is performed on the double glazing G1, G2 to change the external dimensions of the length and width.

[0021] The frames 340, 350 of the outer shoji screen for interior windows 34 and the inner shoji screen for interior windows 35 are resin or wooden frames each consisting of a resin or wooden upper frame 341, 351, a lower frame 342, 352, a door leading frame 343, 353, and a door trailing frame 344, 354. The upper frames 341, 351, the lower frames 342, 352, the door leading frame 343, 353, and the door trailing frame 344, 354 have a width smaller than the width of the existing upper frames 441, 451, the existing lower frames 442, 452, the existing door leading frame 443, 453, and the existing door trailing frame 444, 454 of the existing outer shoji screen 44 and the existing inner shoji screen 45. As a result, even if the double-pane glass G1, G2 is common to the existing outer shoji screen 44 and the existing inner shoji screen 45, the outer dimensions of the outer shoji screen 34 for the inner window and the inner shoji screen 35 for the inner window are made smaller than the outer dimensions of the existing outer shoji screen 44 and the existing inner shoji screen 45.

[0022] As shown in Figures 4, 14 and 15, metal profile members 3431, 3531 are attached to the inside of the door end frames 343, 353. As shown in Figure 4, metal profile members 3441, 3541 are attached to the inside of the door end frames 344, 354. This increases the strength of the door end and door end sides of the outer shoji screen for interior windows 34 and the inner shoji screen for interior windows 35.

[0023] Double door rollers 345, 355, each with two wheels, are attached to both longitudinal ends of the bottom frames 342, 352. Because the bottom frames 342, 352 have a small overall width, the wheels are formed with a smaller diameter than the wheels of the door rollers used for the exterior window 2. Even though the wheels of the double door rollers 345, 355 are small in diameter, their double design allows them to stably support the outer door screen 34 for the interior window and the inner door screen 35 for the interior window. However, the door rollers attached to the bottom frames 342, 352 are not limited to double door rollers, and may be triple door rollers with three wheels or door rollers with more wheels.

[0024] Separately from the process of forming the outer shoji screen 34 for an interior window and the inner shoji screen 35 for an interior window, after removing the existing outer shoji screen 44 and the existing inner shoji screen 45 in step S1, the frame member 110 is removed (step S2). This is because, in this embodiment, the external dimensions of the newly installed inner window frame body 30 are larger than the inner opening dimensions of the frame member 110 around all four sides, and therefore, replacement with a new frame member is necessary. In this embodiment, only the height dimension of the inner window frame body 30 is larger than the inner opening dimension in the height direction of the frame member 110. Therefore, in step S2, the upper frame member 111 and the lower frame member 112 are removed to be replaced with new upper frame member 111A and lower frame member 112A. At this time, the upper angle member 414 and the lower angle member 424 are also temporarily removed.

[0025] The new upper frame member 111A and lower frame member 112A will be described with reference to FIG. 9. The upper frame member 111A and lower frame member 112A have a vertically symmetrical structure. The upper frame member 111A and the lower frame member 112A are made of resin or wood and have grooves 1110, 1120 extending along their entire length. The grooves 1110, 1120 are recessed in the projection direction from the inner surfaces 111b, 112b of the upper frame member 111A and the lower frame member 112A with a predetermined width. The grooves 1110, 1120 are composed of first grooves 1111, 1121 located on the indoor side X2 and second grooves 1112, 1122 located at the ends of the first grooves 1111, 1121 on the outdoor side X1. The depth of the first grooves 1111, 1121 is deeper than the depth of the second grooves 1112, 1122. The projection width of the first grooves 1111, 1121 is greater than the projection width of the second grooves 1112, 1122. As will be described later, the first grooves 1111, 1121 have a projection width that can accommodate the upper frame 31 and lower frame 32 of the interior window frame body 30. The second grooves 1112, 1122 have a projection width and depth that can accommodate the outer ends 512a, 522a of the visible wall portions 512, 522 of the cover members 51, 51, respectively, as will be described later.

[0026] After removing the existing upper frame member 111 and lower frame member 112 in step S2, new upper frame member 111A and lower frame member 112A having grooves 1110, 1120 are installed in the same locations along with upper angle member 414 and lower angle member 424, as shown in Figure 10 (step S3).

[0027] 10 and 11, the new frame 20, which has been framed on all four sides, is pulled from the outdoor side X1 of the existing frame 40 to the indoor side X2 and attached to the inner periphery of the existing frame 40 (step S4). The new frame 20 is attached to the inner periphery of the existing frame 40 via spacer members (not shown in FIGS. 10 and 11) of an appropriate thickness that adjust the gap with the existing frame 40. After the new frame 20 is attached, cover members 51, 52, and 53 that shield the indoor-facing surface of the new frame 20 are attached to the ends of the new frame 20 on the indoor side X2.

[0028] Next, the inner window frame body 30 is attached to the inner periphery of the frame member 110 (Step S5). More specifically, as shown in Figures 10 and 11, the upper frame 31 of the inner window frame body 30 is attached to the first groove 1111 of the new upper frame member 111A. The lower frame 32 of the inner window frame body 30 is attached to the first groove 1121 of the new lower frame member 112A. The left and right vertical frames 33 of the inner window frame body 30 are attached to the inner surfaces 113b of the left and right vertical frame members 113, respectively. This allows the inner window frame body 30 to be attached around the entire inner periphery of the frame member 110, as shown in Figures 3 and 4.

[0029] Next, new exterior window outer shoji screens 24 and interior shoji screens 25 are attached to the inside of the new frame 20 (step S6). More specifically, as shown in Figures 3 and 4, the exterior window outer shoji screen 24 is slidably placed between the exterior guide rails 211, 221 of the new upper frame 21 and the new lower frame 22. The exterior window interior shoji screen 25 is slidably placed between the interior guide rails 212, 222 of the new upper frame 21 and the new lower frame 22.

[0030] Next, the outer shoji screen 34 for the inner window and the inner shoji screen 35 for the inner window assembled in step S1a are attached to the inside of the inner window frame body 30 (step S7). More specifically, as shown in Figures 3 and 4, the outer shoji screen 34 for the inner window is slidably fitted into the exterior guide rails 312, 322 of the upper frame 31 and lower frame 32 of the inner window frame body 30. The inner shoji screen 35 for the inner window is slidably fitted into the interior guide rails 313, 323 of the upper frame 31 and lower frame 32 of the inner window frame body 30. In this way, the existing window 4 is converted into a double-glazed window 1 comprising an exterior window 2 and an interior window 3.

[0031] Next, the specific structure of the double-glazed window 1 will be further described with reference to Figures 12 to 15. First, the specific structure of the new frame 20 in the outer window 2 of the double-glazed window 1 will be described.

[0032] The new upper frame 21 is formed of a metal frame made of extruded profiles. As shown in Figure 12, the new upper frame 21 has an expected width extending from the screen door guide rail 413 of the existing upper frame 41 to the outside X1 beyond the recessed groove 1110 of the upper frame member 111A. The new upper frame 21 integrally includes an outside guide rail 211 and an inside guide rail 212 corresponding to the exterior window exterior shoji 24 and the interior exterior window shoji 25, as well as a screen door guide rail 213 located furthest outside X1. A resin cover material C1 is attached to the inside surface of the new upper frame 21 between the outside guide rail 211 and the inside guide rail 212.

[0033] The new upper frame 21 has an outdoor hollow portion S11 and an indoor hollow portion S12, each of which has a generally rectangular cross section and extends over the entire length of the new upper frame 21. The outdoor hollow portion S11 and the indoor hollow portion S12 are arranged side by side in the projection direction of the new upper frame 21, with a partition wall S13 in between. The outer surfaces S1a of the outdoor hollow portion S11 and the indoor hollow portion S12 are both flat and formed flush in the projection direction of the new upper frame 21. The outdoor guide rail 211 extends downward from the end of the outdoor hollow portion S11 on the outdoor side X1. The indoor guide rail 212 extends downward from a midpoint in the projection direction of the indoor hollow portion S12.

[0034] The new upper frame 21 has an integral outdoor extension 214 that extends toward the outdoor side X1 at a position closer to the outdoor side X1 than the outdoor hollow portion S11 and lower than the outer surface S1a of the outdoor hollow portion S11. The outdoor extension 214 connects the outdoor guide rail 211 and the screen door guide rail 213 in the forward direction. The outdoor extension 214 also functions as a drainage groove that channels rainwater that has seeped onto the new upper frame 21 in the left-right direction without allowing it to flow into the indoor side X2.

[0035] An outdoor wall portion 215 extending outward in the sight direction is integrally formed at the end of the outdoor extension portion 214 closest to the outside (X1). The outdoor wall portion 215 is positioned so as to overlap the outdoor side surface 413a of the screen door guide rail 413 of the existing upper frame 41 from the outside (X1) side. A decorative material 216 made of metal is attached to the outdoor wall portion 215 so as to be detachable from the outside (X1) side. The decorative material 216 covers the outdoor wall portion 215 and extends outward in the sight direction beyond the existing upper frame 41, forming the visible surface of the new upper frame 21 on the outside (X1) side. The decorative material 216 conceals the area from the outside (X1) side extending from the existing upper frame 41 to the area including the sealing material 102a arranged between the existing upper frame 41 and the exterior material 102.

[0036] An elastic fin member 217 is provided on the outer surface S1a of the end of the outdoor hollow portion S11 on the outdoor side X1. The fin member 217 protrudes upward so as to be close to the outdoor guide rail 411 of the existing upper frame 41. Even if rainwater seeps in between the new upper frame 21 and the existing upper frame 41, the rainwater flows left and right through the outdoor extension portion 214 and is drained to the outer periphery of the new vertical frame 23, preventing it from seeping into the indoor side X2. Even if a large amount of rainwater seeps into the outdoor extension portion 214, the fin member 217 prevents it from seeping into the indoor side X2. Because the fin member 217 is elastic, it can bend elastically even if it comes into contact with the existing upper frame 41 or the like when attaching the new upper frame 21 to the inner periphery of the existing upper frame 41, eliminating the risk of damaging the existing upper frame 41 or the like.

[0037] An attachment portion 218 for fixing the new upper frame 21 to the building skeleton 100 is integrally formed at the end of the new upper frame 21 on the indoor side X2. The attachment portion 218 extends in a plate-like shape from an outer portion of the end face of the indoor side X2 in the indoor hollow portion S12 toward the indoor side X2. The new upper frame 21 is arranged on the inner periphery of the existing upper frame 41 and the upper frame member 111A via a spacer member SP1. The spacer member SP1 is arranged closer to the inner surface 111b on the outdoor side X1 than the recessed groove 1110 in the upper frame member 111A. The spacer member SP1 is composed of one or more plate-like members. The thickness and number of layers of the plate-like members constituting the spacer member SP1 are adjusted appropriately depending on the size of the gap between the new upper frame 21 and the existing upper frame 41 and upper frame member 111A. The new upper frame 21 is fixed to the building skeleton 100 from the indoor side X2 by a screw SC1 that passes through the mounting portion 218, the spacer member SP1, and the upper frame member 111A.

[0038] A resin angle member 219 is attached to the end of the new upper frame 21 on the indoor side X2. The angle member 219 integrally includes an L-shaped angle portion 2191 extending toward the indoor side X2, and a cover portion 2192 extending from the angle portion 2191 toward the outdoor side X1. The angle portion 2191 is arranged so as to cover the mounting portion 218 from the inside. The cover portion 2192 extends along the inner surface of the new upper frame 21 between the angle portion 2191 and the indoor side guide rail 212.

[0039] A resin cover member 51 is attached to the indoor side X2 of the angle member 219. The cover member 51 has a base 511 attached to the angle portion 2191 of the angle member 219 with a screw 51a, and a visible wall portion 512 extending from the base 511 toward the second recessed groove 1112 of the upper frame member 111A. The visible wall portion 512 covers the space between the angle portion 2191 and the upper frame member 111A from the indoor side X2. As a result, the visible wall portion 512 of the cover member 51 shields the indoor side X2 visible surface of the new upper frame 21.

[0040] The outer end 512a of the visible wall portion 512 of the cover member 51 is positioned within the second recessed groove 1112 of the upper frame member 111A. When the inner window 3 is open, the boundary between the spacer member SP1 and the upper frame member 111A is not visible from the inside X2 of the room, improving the design of the upper frame side when the double window 1 is viewed from the inside X2 of the room.

[0041] The new sill 22 is formed of a metal frame made of extruded profiles. As shown in Figure 13, the new sill 22 has an expected width extending from the screen door guide rail 423 of the existing sill 42 to the outside X1 beyond the recessed groove 1120 of the lower frame member 112A. The new sill 22 integrally includes an outside guide rail 221 and an inside guide rail 222 corresponding to the exterior window exterior shoji 24 and the exterior window interior shoji 25, as well as a screen door guide rail 223 positioned furthest outside X1. A resin cover material C2 is attached to the inside surface of the new sill 22 between the outside guide rail 221 and the inside guide rail 222.

[0042] The new lower frame 22 has an outdoor hollow portion S21 and an indoor hollow portion S22 that extend over the entire length of the new lower frame 22. The outdoor hollow portion S21 and the indoor hollow portion S22 are arranged side by side in the projection direction of the new lower frame 22, with the partition wall S23 interposed between them. The internal space of the outdoor hollow portion S21 is formed so as to bulge toward the existing lower frame 42 as it moves from the partition wall S23 toward the outside X1. The indoor hollow portion S22 has a generally rectangular cross section. The outdoor guide rail 221 extends upward from a midpoint in the projection direction of the outdoor hollow portion S21. The indoor guide rail 222 extends upward from a midpoint in the projection direction of the indoor hollow portion S22.

[0043] A height adjustment member 224 is attached to the end of the exterior side X1 of the new sill 22. The height adjustment member 224 extends from the new sill 22 toward the existing sill 42 and is placed between the exterior guide rail 421 of the existing sill 42 and the screen door guide rail 423. By adjusting the height adjustment member 224, the height of the exterior side X1 of the new sill 22 is adjusted. A decorative member 225 made of metal is attached to the end face of the exterior side X1 of the new sill 22 so as to be detachable from the exterior side X1. The decorative member 225 covers the height adjustment member 224 and extends outward in the viewing direction beyond the existing sill 42, forming the viewing surface of the exterior side X1 of the new sill 22. The decorative member 225 conceals the area from the exterior side X1, extending from the existing sill 42 to the area including the sealing material 102a arranged between the existing sill 42 and the exterior material 102.

[0044] An attachment portion 226 for fixing the new lower frame 22 to the building skeleton 100 is integrally formed at the end of the new lower frame 22 on the indoor side X2. The attachment portion 226 extends in a plate-like shape from an outer portion of the end face of the indoor side X2 in the indoor-side hollow portion S22 toward the indoor side X2. The new lower frame 22 is arranged on the inner periphery of the existing lower frame 42 and the lower frame member 112A via the spacer member SP2. The spacer member SP2 is arranged closer to the inner surface 112b on the outdoor side X1 than the recessed groove 1120 in the lower frame member 112A. The spacer member SP2 is composed of one or more plate-like members. The thickness and number of layers of the plate-like members constituting the spacer member SP2 are appropriately adjusted depending on the size of the gap between the new lower frame 22 and the existing lower frame 42 and the lower frame member 112A. The new lower frame 22 is fixed to the building skeleton 100 from the indoor side X2 by screws SC2 that pass through the mounting portion 226, spacer member SP2 and lower frame member 112A.

[0045] A resin angle member 227 is attached to the end of the new lower frame 22 on the indoor side X2. The angle member 227 integrally includes an L-shaped angle portion 2271 extending toward the indoor side X2 and a cover portion 2272 extending from the angle portion 2271 toward the outdoor side X1. The angle portion 2271 is arranged to cover the mounting portion 226 from the inside. The cover portion 2272 extends along the inner surface of the new lower frame 22 between the angle portion 2271 and the indoor side guide rail 222.

[0046] A resin cover member 52 is attached to the indoor side X2 of the angle member 227. The cover member 52 has a base 521 attached to the angle portion 2271 of the angle member 227 with a screw 52a, and a visible wall portion 522 extending from the base 521 toward the second recessed groove 1122 of the lower frame member 112A. The visible wall portion 522 covers the space between the angle portion 2271 and the lower frame member 112A from the indoor side X2. As a result, the visible wall portion 522 of the cover member 52 shields the indoor side X2 visible surface of the new lower frame 22.

[0047] The outer end 522a of the visible wall portion 522 of the cover member 52 is positioned within the second groove 1122 of the lower frame member 112A. When the inner window 3 is open, the boundary between the spacer member SP2 and the lower frame member 112A is not visible from the inside X2 of the room, improving the design of the lower frame side when the double-glazed window 1 is viewed from the inside X2 of the room.

[0048] The new vertical frame 23 is formed of a metal frame made of extruded profiles. As shown in Figures 14 and 15, the new vertical frame 23 has a projected width extending from the outside X1 end of the existing vertical frame 43 to the outside X1 end of the vertical frame member 113. The new vertical frame 23 has an outside hollow portion S31 and an inside hollow portion S32, each of which has a substantially rectangular cross section and extends over the entire length of the new vertical frame 23. The outside hollow portion S31 and the inside hollow portion S32 are arranged side by side in the projected direction of the new vertical frame 23, with a partition wall S33 interposed between them. The outer surfaces S3a of the outside hollow portion S31 and the inside hollow portion S32 are both flat and formed flush with the projected direction of the new vertical frame 23. On the inner surface of the new vertical frame 23, there are projecting pieces 231 for the shoji screen that engage with the door frame sills 243, 253 of the outer shoji screen 24 for the exterior window and the inner shoji screen 25 for the exterior window when they are closed.

[0049] An outdoor wall portion 232 extending outward in the sight direction is integrally formed on the end of the outdoor side X1 of the new vertical frame 23. The outdoor wall portion 232 protrudes outward in the sight direction further than the outer surfaces S3a of the outdoor hollow portion S31 and the indoor hollow portion S32 and is positioned so as to overlap the end face 43a of the outdoor side X1 of the existing vertical frame 43 from the outdoor side X1. Furthermore, a decorative material 233 made of metal is detachably attached to the end of the outdoor side X1 of the new vertical frame 23. The decorative material 233 covers the outdoor wall portion 232 and extends outward in the sight direction beyond the existing vertical frame 43, forming the sight surface of the outdoor side X1 of the new vertical frame 23. The decorative material 233 conceals the area from the outdoor side X1, extending from the existing vertical frame 43 to the area including the sealing material 102a arranged between the existing vertical frame 43 and the exterior material 102.

[0050] An attachment portion 234 for fixing the new vertical frame 23 to the building skeleton 100 is integrally provided at the end of the indoor side X2 of the new vertical frame 23. The attachment portion 234 extends in a plate-like shape from an inner portion of the end face of the indoor side X2 in the indoor-side hollow portion S32 toward the indoor side X2. The new vertical frame 23 is arranged on the inner periphery of the existing vertical frame 43 and the vertical frame member 113 via a spacer member SP3. The spacer member SP3 is arranged at the end of the inner surface 113b of the vertical frame member 113 on the outdoor side X1. The spacer member SP3 is composed of one or more plate-like members. The thickness and number of layers of the plate-like members that make up the spacer member SP3 are set appropriately depending on the size of the gap between the new vertical frame 23 and the existing vertical frame 43 and the vertical frame member 113. The new vertical frame 23 is fixed to the building skeleton 100 by screws SC3 that pass through the mounting portion 234, spacer member SP3, and vertical frame member 113 from the indoor side X2.

[0051] A resin angle member 235 is attached to the end of the new vertical frame 23 on the indoor side X2. The angle member 235 integrally includes an L-shaped angle portion 2351 extending toward the indoor side X2 and a cover portion 2352 extending from the angle portion 2351 toward the outdoor side X1. The angle portion 2351 is arranged to cover the mounting portion 234 from the inside. The cover portion 2352 extends along the inner surface of the new vertical frame 23 on the outdoor side X1 further than the angle portion 2351. The angle member 235 is attached to the inner surface of the new vertical frame 23 by the cover portion 2352 with screws 235a.

[0052] A resin cover member 53 is attached to the indoor side X2 of the angle member 235. The cover member 53 has a base 531 attached to the angle portion 2351 of the angle member 235 with a screw 53a, and a visible wall portion 532 extending from the base 531 toward the inner surface 113b of the vertical frame member 113. The visible wall portion 532 covers the space between the angle portion 2251 and the vertical frame member 113 from the indoor side X2. As a result, the visible wall portion 532 of the cover member 53 shields the indoor side X2 visible surface of the new vertical frame 23.

[0053] Next, we will explain the outer shoji screen for an exterior window 24 and the inner shoji screen for an exterior window 25. In this embodiment, the outer shoji screen for an exterior window 24 and the inner shoji screen for an exterior window 25 are newly constructed shoji screens separate from existing shoji screens when renovating a double-glazed window 1.

[0054] The outer shoji screen 24 for exterior windows and the inner shoji screen 25 for exterior windows are each constructed by fitting new double-pane glass G10, G20 inside a frame body 240, 250 formed by assembling an upper frame 241, 251, a lower frame 242, 252, a door end frame 243, 253, and a door end frame into a rectangular shape.

[0055] The frames 240, 250 have a composite structure of metal and resin. Specifically, the upper frames 241, 251 are composed of metal frames 2411, 2511 and resin frames 2412, 2512 attached to the interior X2 side of the metal frames 2411, 2511. The lower frames 242, 252 are composed of metal frames 2421, 2521 and resin frames 2422, 2522 attached to the interior X2 side of the metal frames 2421, 2521. The door end frames 243, 253 are composed of metal frames 2431, 2531 and resin frames 2432, 2532 attached to the interior X2 side of the metal frames 2431, 2531. Although not shown, the door end frame is composed of a metal frame and a resin frame attached to the interior side X2 of the metal frame. However, the frames of the exterior window outer screen 24 and the interior window screen 25 are not limited to those having a composite structure of metal and resin, and may be resin frames without a metal frame portion.

[0056] Single door rollers 2423, 2523, each having one wheel, are attached inside the lower frames 242, 252. The wheels of these door rollers 2423, 2523 have a larger diameter than the wheels of the double door rollers 345, 355 used for the interior window 3.

[0057] Next, we will explain the specific structure of the inner window frame body 30 in the inner window 3 of the double-glazed window 1. The inner window frame body 30 is made of a resin frame or a wooden frame, and is composed of an upper frame 31, a lower frame 32, and left and right vertical frames 33. The inner window frame body 30 may be constructed by framing the upper frame 31, the lower frame 32, and the left and right vertical frames 33 into a rectangular shape in advance, or it may be constructed by individually fixing the upper frame 31, the lower frame 32, and the left and right vertical frames 33 to the upper and lower vertical frame members 111A, 112A, 113, respectively, without framing them into a rectangular shape in advance.

[0058] As shown in Figures 10 and 12, the upper frame 31 integrally comprises an upper frame body 311, an exterior guide rail 312, an interior guide rail 313, and an interior wall portion 314. The upper frame body 311 is formed in a flat plate shape. The projected width of the first recessed groove 1111 in the upper frame member 111A is large enough to accommodate the upper frame body 311. A plurality of parallel ridges 3111 are formed on the outer surface of the upper frame body 311, spanning the entire length of the upper frame body 311. Because the upper frame 31 contacts the upper frame member 111A via the multiple ridges 3111, heat from the upper frame member 111A side is less likely to be transferred to the inside of the interior window frame body 30.

[0059] The outdoor guide rail 312 and the indoor guide rail 313 each have a hollow shape with a rectangular cross section, and protrude inward from the upper frame body 311. The indoor wall portion 314 is disposed at the end of the upper frame body 311 on the indoor side X2, and protrudes inward from the upper frame body 311.

[0060] 12, the indoor side wall portion 314 protrudes inward from the inner surface 111b of the upper frame member 111A when the upper frame 31 is housed in the first recessed groove 1111 of the upper frame member 111A. This conceals the gap formed between the upper frames 341, 351 of the outer shoji screen for inner window 34 and the inner shoji screen for inner window 35 housed in the inner window frame body 30 and the inner surface 111b of the upper frame member 111A from the indoor side X2.

[0061] As shown in Figures 10 and 13, the lower frame 32 integrally comprises a lower frame body 321, an exterior guide rail 322, an interior guide rail 323, and an interior wall portion 324. The lower frame body 321 is formed in a flat plate shape. The projected width of the first recessed groove 1121 in the lower frame member 112A is large enough to accommodate the lower frame body 321. A plurality of parallel ridges 3211 are formed on the outer surface of the lower frame body 321, spanning the entire length of the lower frame body 321. Because the lower frame 32 contacts the lower frame member 112A via the multiple ridges 3211, heat from the lower frame member 112A side is less likely to be transferred to the inside of the interior window frame body 30.

[0062] The outdoor guide rail 322 and the indoor guide rail 323 are each formed in a solid shape with a rectangular cross section, and protrude inward from the lower frame body 321. The indoor wall portion 324 is disposed at the end of the lower frame body 321 on the indoor side X2, and protrudes inward from the lower frame body 321.

[0063] 13, the indoor side wall portion 324 protrudes inward from the inner surface 112b of the lower frame member 112A when the lower frame 32 is housed in the first recessed groove 1121 of the lower frame member 112A. This conceals the gap formed between the lower frames 342, 352 of the outer shoji screen for inner window 34 and the inner shoji screen for inner window 35 housed in the inner window frame body 30 and the inner surface 112b of the lower frame member 112A from the indoor side X2.

[0064] The left and right vertical frames 33 have a symmetrical structure in the left-right direction and the front-to-back direction. As shown in Figures 11, 14, and 15, the vertical frame 33 integrally comprises a vertical frame main body 331, a protruding portion 332, an outdoor wall portion 333, and an indoor wall portion 334. The protruding portion 332, the outdoor wall portion 333, and the indoor wall portion 334 protrude inward from the vertical frame main body 331 to the same height.

[0065] The vertical frame body 331 is formed in a flat plate shape. On the outer surface of the vertical frame body 331, multiple parallel ridges 3311 are formed over the entire length of the vertical frame body 331. Because the vertical frame 33 contacts the vertical frame member 113 via the multiple ridges 3311, heat from the vertical frame member 113 is less likely to be transmitted to the inside of the interior window frame body 30.

[0066] The protrusion 332 is located at the center of the vertical frame body 331 in the projection direction. As shown in Figures 4 and 14, the protrusion 332 of the vertical frame 33 to which the outer shoji screen for an interior window 34 is pulled in the closed state is located on the indoor side X2 of the end frame 343 of the outer shoji screen for an interior window 34. As shown in Figures 4 and 15, the protrusion 332 of the vertical frame 33 to which the inner shoji screen for an interior window 35 is pulled in the closed state is located on the indoor side X2 of the end frame 353 of the inner shoji screen for an interior window 35. A fin member 3321 is attached to the protrusion 332 to seal the gap between the end frames 343, 353 of the outer shoji screen for an interior window 34 and the inner shoji screen for an interior window 35 in the closed state.

[0067] The outdoor wall portion 333 is disposed at the outdoor side X1 end portion of the vertical frame body 331. As shown in Figures 14 and 15, the outdoor wall portion 333 covers and conceals, from the indoor side X2, the gap between the outer end portion 531a of the visible wall portion 532 of the cover member 53 provided on the indoor side X2 of the exterior window 2 and the vertical frame member 113.

[0068] The indoor side wall portion 334 is disposed at the indoor side X2 end portion of the vertical frame body 331. As shown in Fig. 14 in particular, the indoor side wall portion 334 of the vertical frame 33, to which the inner shoji screen for an inner window 35 in the closed state is pulled, covers and conceals the gap between the door edge frame 353 of the inner shoji screen for an inner window 35 and the vertical frame body 331 from the indoor side X2.

[0069] The outer shoji screen 34 for an interior window is slidably housed in the exterior guide rails 312, 322 of the upper frame 31 and the lower frame 32. The inner shoji screen 35 for an interior window is slidably housed in the interior guide rails 313, 323 of the upper frame 31 and the lower frame 32. In this embodiment, as shown in Fig. 8, the visible width of the frames 340, 350 of the outer shoji screen 34 for an interior window and the inner shoji screen 35 for an interior window is smaller than the visible width of the existing frames 440, 450 of the existing outer shoji screen 44 and the existing inner shoji screen 45. As shown in Figs. 3, 4, 12 to 15, the frames 340, 350 of the outer shoji screen 34 for an interior window and the inner shoji screen 35 for an interior window are positioned outside the opening lines L1, L2, L3 formed by the cover members 51, 52, 53 on the interior side X2 of the exterior window 2. The frames 340, 350 of the outer shoji screen for interior windows 34 and the inner shoji screen for interior windows 35 do not block the opening of the outer window 2 formed by the cover members 51, 52, 53 from the inside X2, so light from outside is not blocked by the inner window 3. If the frames 340, 350 of the outer shoji screen for interior windows 34 and the inner shoji screen for interior windows 35 are made of resin, they are unified in design with the resin cover members 51, 52, 53, resulting in good design.

[0070] In the above embodiment, the existing window 4 was remodeled into an exterior window 2 using the covering method, but the exterior window is not limited to remodeling an existing window using the covering method. Fig. 16 shows a double-glazed window 1A in which the existing frame 40 of the existing window is used as is to form an exterior window 2A. The exterior window 2A has a new exterior window outer shoji screen 24A and an interior exterior window shoji screen 25A housed inside the existing frame 40. The interior window 3 of this double-glazed window 1A has the same configuration as the interior window 3 of the double-glazed window 1 remodeled using the covering method described above.

[0071] A method for converting the window into a double-glazed window 1A in this case will be described with reference to FIG.

[0072] First, the existing outer shoji screen 44, the existing inner shoji screen 45, and the existing screen door 46 are removed from the existing frame 40 (step S11).

[0073] In step S11, the existing outer shoji screen 44 and the existing inner shoji screen 45 are removed, and then the double-pane glass G1, G2 of the existing outer shoji screen 44 and the existing inner shoji screen 45 are used as they are to assemble the outer shoji screen 34 for the inner window and the inner shoji screen 35 for the inner window to be used in the inner window 3 in the same manner as shown in Figure 8 (step S11a).

[0074] Separately from the above-mentioned process of forming the outer shoji screen 34 for interior windows and the inner shoji screen 35 for interior windows, after removing the existing outer shoji screen 44 and the existing inner shoji screen 45 in step S11, the frame members 110 (upper frame member 111 and lower frame member 112) are removed (step S12).

[0075] In step S12, the existing upper frame member 111 and lower frame member 112 are removed, and then new upper frame member 111A and lower frame member 112A having grooves 1110 and 1120 are installed in the same locations, along with upper angle member 414 and lower angle member 424, in the same manner as in Figure 10 (step S13).

[0076] Next, in the same manner as in FIGS. 10 and 11, the inner window frame body 30 is attached to the inner periphery of the frame member 110 (step S14).

[0077] Next, new exterior window outer screen 24A and interior window screen 25A are attached to the inside of the existing frame 40 (step S15). The new exterior window outer screen 24A and interior window screen 25A are constructed by utilizing the existing frames 440, 450 of the existing exterior screen 44 and interior screen 45 as they are and fitting new double-glazed glass G10, G20 inside them. In step S15, as shown in FIG. 16, the exterior window outer screen 24A is slidably fitted between the exterior guide rails 411, 421 of the existing upper frame 41 and the existing lower frame 42, and the exterior window inner screen 25A is slidably fitted between the interior guide rails 412, 422 of the existing upper frame 41 and the existing lower frame 42.

[0078] Next, the outer shoji screen 34 for the inner window and the inner shoji screen 35 for the inner window assembled in step S11a are attached to the inside of the inner window frame body 30 (step S16). In this way, the existing window is remodeled into a double-glazed window 1A equipped with an outer window 2A and an inner window 3, using the existing frame 40 as is.

[0079] In the above embodiment, the glass of each shoji screen is made of double-glazed glass G1, G2, G10, or G20, but this is not limiting. Each shoji screen may be made of a single sheet of glass or may be made of double-glazed glass having three or more sheets of glass.

[0080] In the above embodiment, the recessed grooves 1110, 1120 are formed in the upper frame member 111A and the lower frame member 112A, respectively, of the frame members 110 that extend around the four sides, but the recessed grooves may be formed in only one of the upper frame member 111A and the lower frame member 112A. Depending on the external vertical and horizontal dimensions of the interior window frame body, the recessed grooves may be formed in at least one of the upper, lower, and vertical frame members of the frame members 110 that extend around the four sides, or may not be formed in any of the frame members 110.

[0081] The exterior and interior windows are not limited to sliding windows. The exterior and interior windows may be, for example, fixed windows or casement windows. When the interior window is a casement window, the shoji screen is configured to open inward. As shown in Figure 18, when a recessed groove 1110A is formed in the frame member 110A used for this inward-opening window, the recessed groove 1110A that accommodates the interior window frame body is formed to open to the inside X2 of the room so as not to interfere with the opening and closing of the shoji screen.

[0082] The remodeling method for the double-glazed window 1, 1A according to each of the above embodiments has the following advantages.

[0083] A method for renovating a double-glazed window into a double-glazed window 1, 1A having an outer window 2, 2A and an inner window 3, the method comprising: removing glass (double-glazed glass G1, G2) from the existing shoji (existing outer shoji 44 and existing inner shoji 45) having glass G1, G2 in an existing frame 40 provided in an opening 101 of a building skeleton 100; New frames 340, 350 are attached to the existing frames 40 (G2) to form the interior window shoji (exterior shoji 34 for interior windows and interior shoji 35 for interior windows), and the interior window frame body 30 is attached to the interior side X2 of the existing frame 40. The existing frame 40 is used to fit the exterior window shoji (exterior shoji 24, 24A for exterior windows and interior shoji 25, 25A for exterior windows), and the interior window shoji (exterior shoji 34 for interior windows and interior shoji 35 for interior windows) is fitted into the interior window frame body 30.

[0084] According to this method, when the glass (double glazing G1, G2) used in existing windows is replaced because it has reached the end of its useful life, etc., the glass (double glazing G1, G2) does not need to be discarded, but can be effectively used as glass for the inner window 3 to improve the thermal insulation performance of the opening 101 in the building skeleton 100. This is because the glass for the inner window 3 does not require as much strength as the glass for the outer window 2. Therefore, this renovation method makes it possible to achieve both effective use of the glass (double glazing G1, G2) and improved performance of the opening 101.

[0085] The exterior window shoji screens 24A, 25A may be constructed by attaching new glass (double-pane glass G10, G20) to the existing frames 440, 450 after removing the glass (double-pane glass G1, G2) from the existing shoji screens (existing outer shoji screen 44 and existing inner shoji screen 45).

[0086] This allows the existing frames 440, 450 of the existing shoji screens (the existing outer shoji screen 44 and the existing inner shoji screen 45) to be effectively utilized.

[0087] Newly constructed shoji screens for exterior windows (external shoji screen for exterior windows 24 and internal shoji screen for exterior windows 25) may be installed in the existing frame 40 separately from the existing shoji screens (existing outer shoji screen 44 and existing internal shoji screen 45).

[0088] This improves the design of the double-glazed window 1 when viewed from the outside X1.

[0089] A new frame 20 is attached to the inner periphery of the existing frame 40, and the exterior window shoji screens (exterior window shoji screen 24 and interior window shoji screen 25) are placed in the new frame 20.

[0090] This makes it possible to easily construct an exterior window 2 having a new frame body by utilizing the existing frame 40.

[0091] Cover members 51, 52, and 53 that shield the visible surface of the indoor side X2 of the new frame 20 are attached around the four periphery of the indoor side X2 of the new frame 20.

[0092] This improves the design of the new frame 20 when viewed from the indoor side X2.

[0093] The outer ends 512a, 522a of at least one of the upper and lower interior facing surfaces (facing wall portions 512, 522) of the four peripheries of the cover members 51, 52, 53 are disposed in the recessed grooves 1110, 1120.

[0094] As a result, when the inner window 3 is opened, the boundary between the cover members 51, 52, 53 and the frame members 110 (upper frame member 111A, lower frame member 112A) is not visible from the inside X2 of the room, thereby improving the design of the double-glazed window 1, 1A when viewed from the inside X2 of the room.

[0095] The frames 340, 350 of the interior window shoji screens (exterior interior window shoji screen 34 and interior interior window shoji screen 35) are positioned outside the opening lines L1, L2, L3 of the cover members 51, 52, 53 that run around the four sides.

[0096] According to this, the frames 340, 350 of the interior window shoji screens (exterior shoji screen for interior window 34 and interior shoji screen for interior window 35) do not block the opening of the exterior window 2 from the inside X2, so that the interior window 3 does not block light from outside.

[0097] The existing frame 40 has frame members 110 around the four sides on the indoor side X2, and at least one of the upper and lower frame members 110 is replaced with a frame member (upper frame member 111A, lower frame member 112A, frame member 110A) having grooves 1110, 1120, 1110A, and the interior window frame body 30 is installed in the grooves 1110, 1120, 1110A.

[0098] This allows the inner window frame body 30 to be attached to the inner periphery of the frame member 110 even if the outer dimensions of the inner window frame body 30 are larger than the inner opening dimensions of the frame member 110 due to the size of the glass to be reused (double glazing G1, G2). This allows the opening of the inner window 3 to be made larger.

[0099] The shoji screens for exterior windows (external shoji screens 24, 24A for exterior windows and internal shoji screens 25, 25A for exterior windows) and internal shoji screens (external shoji screens 34 for interior windows and internal shoji screens 35 for interior windows) are shoji screens that have door rollers 2423, 2523, 345, 355, respectively, and are configured to be able to slide laterally along guide rails 211, 221, 212, 222, 312, 322, 313, 323, and the outer diameter of the wheels of the door rollers 345, 355 provided on the shoji screens for interior windows (external shoji screens 34 for interior windows and internal shoji screens 35 for interior windows) is made smaller than the outer diameter of the wheels of the door rollers 2423, 2523 provided on the shoji screens for exterior windows (external shoji screens 24, 24A for exterior windows and internal shoji screens 25, 25A for exterior windows).

[0100] This allows the visible width of the frames 340, 350 of the interior window shoji screens (exterior shoji screen for interior windows 34 and interior shoji screen for interior windows 35) to be reduced, and even if the glass (double-pane glass G1, G2) is used as is, the interior window shoji screens (exterior shoji screen for interior windows 34 and interior shoji screen for interior windows 35) can be made compact.

[0101] The door rollers 345, 355 provided on the interior window shoji screens (the exterior interior window shoji screen 34 and the interior interior window shoji screen 35) are door rollers having two or more wheels.

[0102] This allows the inner window shoji screens (inner window outer shoji screen 34 and inner window inner shoji screen 35) to be stably supported even if the wheels are made smaller in diameter.

[0103] The interior window frame body 30 is a resin frame or a wooden frame.

[0104] This improves the heat insulating properties of the inner window 3.

[0105] The frames 340, 350 of the interior window shoji screens (exterior interior window shoji screen 34 and interior interior window shoji screen 35) are made of resin or wood.

[0106] This improves the heat insulating properties of the inner window 3.

[0107] The present disclosure includes building fixtures according to the following aspects. <Aspect 1> A method for renovating a double-glazed window into a double-glazed window with an outer window and an inner window. The method involves renovating a window with an existing shoji screen, which has glass panes in an existing frame installed in an opening of a building frame, into a double-glazed window with an outer window and an inner window. Remove the glass from the existing shoji screen, A new frame is attached to the removed glass pane to form a shoji screen for an interior window. Attach an interior window frame body to the interior side of the existing frame; A method for renovating a double-glazed window by fitting an outer window shoji screen into the existing frame and fitting the inner window shoji screen into the inner window frame body.

[0108] <Aspect 2> A method for renovating a double-glazed window as described in aspect 1, in which the glass is removed from the existing shoji screen and new glass is attached to the existing frame to form the exterior window shoji screen.

[0109] <Aspect 3> A method for renovating a double-glazed window according to aspect 1, wherein a newly constructed exterior window shoji screen is fitted into the existing frame separately from the existing shoji screen.

[0110] <Aspect 4> A method for renovating a double-glazed window according to aspect 3, comprising attaching a new frame to the inner periphery of the existing frame and fitting the exterior window shoji screen into the new frame.

[0111] <Aspect 5> A method for renovating a double-glazed window as described in aspect 4, in which a cover member is attached around the four sides of the interior side of the new frame to shield the visible surface on the interior side of the new frame.

[0112] <Aspect 6> A method for renovating a double-glazed window as described in aspect 5, in which the outer end of the interior facing surface of at least one of the upper and lower sides of the four periphery of the cover member is positioned within the groove.

[0113] <Aspect 7> A method for renovating a double-glazed window as described in aspect 5 or 6, wherein the frame of the interior window shoji screen is positioned outside the opening line of the cover member around all four sides.

[0114] <Aspect 8> The existing frame has a frame member extending around the four sides on the indoor side, A method for renovating a double-glazed window described in any of aspects 1 to 7, in which at least one of the upper and lower frame members is replaced with a frame member having a groove, and the inner window frame body is attached within the groove.

[0115] <Aspect 9> The outer window shoji screen and the inner window shoji screen each have a door roller and are configured to be slidable laterally along a guide rail, A method for renovating a double-glazed window according to any one of aspects 1 to 8, wherein the outer diameter of the wheels of the door rollers provided on the interior window shoji screen is made smaller than the outer diameter of the wheels of the door rollers provided on the exterior window shoji screen.

[0116] <Aspect 10> A method for renovating a double-glazed window according to aspect 9, wherein the rollers provided on the interior window shoji screen are rollers having two or more wheels.

[0117] <Aspect 11> A method for renovating a double-glazed window according to any one of aspects 1 to 10, wherein the inner window frame is a resin frame or a wooden frame.

[0118] <Aspect 12> 12. The method for renovating a double-glazed window according to any one of aspects 1 to 11, wherein the frame of the interior window shoji screen is a resin frame or a wooden frame. [Explanation of symbols]

[0119] 1,1A double-glazed window, 2,2A exterior window, 20 new frame, 24 exterior shoji screen for exterior window, 25 interior shoji screen for exterior window, 3 interior window, 30 interior window frame body, 34 exterior shoji screen for interior window, 35 interior shoji screen for interior window, 340,350 frame body, 345,355 double-row door roller, 40 existing frame, 44 existing exterior shoji screen, 45 existing interior shoji screen, 51,52,53 cover member, 512,522 outer end, 100 building frame, 101 opening, 110 frame member, 111A upper frame member, 112A lower frame member, 1110,1120 groove, G1,G2 double glazing, L1, L2, L3 opening lines

Claims

1. A double-glazed window renovation method for renovating a window with an existing shoji screen having glass in an existing frame installed in an opening of a building frame into a double-glazed window having an outer window and an inner window, Remove the glass from the existing shoji screen, A new frame is attached to the removed glass to form a shoji screen for an interior window. Attach an interior window frame body to the interior side of the existing frame; A method for renovating a double-glazed window by fitting an outer window shoji screen into the existing frame and fitting the inner window shoji screen into the inner window frame body.

2. 2. A method for renovating a double-glazed window as described in claim 1, wherein the glass is removed from the existing shoji screen and then new glass is attached to the existing frame to form the exterior window shoji screen.

3. 2. A method for renovating a double-glazed window as described in claim 1, wherein a newly constructed exterior window shoji screen is fitted into the existing frame separately from the existing shoji screen.

4. 4. A method for renovating a double-glazed window as described in claim 3, wherein a new frame is attached to the inner periphery of the existing frame, and the exterior window shoji screen is placed in the new frame.

5. A method for renovating a double-glazed window as described in claim 4, wherein a cover member is attached around the four periphery of the interior side of the new frame to shield the visible surface on the interior side of the new frame.

6. 6. A method for renovating a double-glazed window as claimed in claim 5, wherein the outer end of at least one of the upper and lower surfaces facing the interior of the cover member is positioned within the groove.

7. 7. A method for renovating a double-glazed window as described in claim 5 or 6, wherein the frame of the interior window shoji screen is positioned outside the opening line of the cover member that extends around all four sides.

8. The existing frame has a frame member extending around the four sides on the indoor side, A method for renovating a double-glazed window as described in any one of claims 1 to 6, wherein at least one of the upper and lower frame members is replaced with a frame member having a groove, and the inner window frame body is attached to the groove.

9. The outer window shoji screen and the inner window shoji screen each have a door roller and are configured to be slidable laterally along a guide rail, A method for renovating a double-glazed window as described in any one of claims 1 to 6, wherein the outer diameter of the wheels of the door rollers provided on the inner window shoji is made smaller than the outer diameter of the wheels of the door rollers provided on the outer window shoji.

10. The method for renovating a double-glazed window according to claim 9, wherein the rollers provided on the interior window shoji screen are rollers having two or more wheels.

11. The method for renovating a double-glazed window according to any one of claims 1 to 6, wherein the inner window frame is a resin frame or a wooden frame.

12. The method for renovating a double-glazed window according to any one of claims 1 to 6, wherein the frame of the interior window shoji is a resin frame or a wooden frame.

Images