How to repair window frames

Abstract

To provide a sash renovation method capable of easily replacing an existing sash with a new one without removing exterior wall materials.SOLUTION: The renovation method is a method of a sash that is attached to a frame 5 of an opening in a structure that is constituted of including a lintel 51 that divides an opening, a window sill 52, and left and right vertical members, which is placed on the indoor side of an exterior material 91. The method includes: an existing frame removal step of removing an existing window frame from the frame 5 of opening in the structure toward the indoor side: a sealing tape attaching step of attaching a sealing tape 70 to at least lintel 51 and left and right vertical members of the frame 5 of the opening in the structure; a new frame attaching step of attaching a new window frame 2B to the frame 5 of the opening in the structure from inside the room abutting on the sealing tape 70; and an interior material installation step of installing an indoor side frame 95B of the new window frame 2B.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a sash renovation method for removing an existing sash attached to a frame opening and installing a new sash.

Background Art

[0002] Patent Document 1 discloses a wall surface unit for a panel construction method, in which a sash is attached to a frame opening frame with screws at a factory to manufacture the wall surface unit, and the wall surface unit is transported to a construction site and installed on the frame of a building. After this wall surface unit is attached to a building, finishing is performed by arranging an outer wall material to a position covering the outer facing surfaces of the upper frame and vertical stiles of the sash.

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] Incidentally, for sashes attached to frame openings of buildings, when they have been used for a long period of time, it is required to replace them with new sashes for renovation. In the wall surface unit of Patent Document 1, a positioning portion for positioning a sash frame in a depth direction is provided on an inner peripheral portion of the frame opening frame, and the frame is positioned by bringing an indoor-facing surface of the frame into contact with the positioning portion. Therefore, when renovating a sash, it is necessary to remove the frame outward to the outdoor side relative to the frame opening frame, and it is also necessary to remove the outer wall material provided on the outdoor side of the frame, which requires large-scale renovation work.

[0005] An object of the present invention is to provide a sash renovation method that allows an existing sash to be easily replaced with a new sash without removing the outer wall material.

Means for Solving the Problem

[0006] The present invention relates to a method for repairing a window sash, which involves replacing an existing window frame with a new window frame, the existing window frame being attached to an opening frame that is configured to have an upper member, a lower member, and left and right vertical members that partition an opening and is located on the interior side of an exterior wall material, and comprising: an existing frame removal step of removing the existing window frame from the opening frame to the interior side; a buffer member attachment step of attaching buffer members to at least the upper member and left and right vertical members of the opening frame, or at least the upper frame and left and right vertical members of the new window frame; a new frame attachment step of attaching the new window frame to the opening frame from the interior side and sealing the space between the opening frame and the new window frame with the buffer members; and an interior material installation step of installing interior material on the interior side of the new window frame. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a method for repairing window sashes that allows for easy replacement of existing sashes with new sashes without removing the exterior wall material. [Brief explanation of the drawing]

[0008] [Figure 1] This is an interior view drawing of a wall unit, including the existing window frames. [Figure 2] This is a vertical cross-sectional view showing the exterior wall portion where the existing window frames are installed. [Figure 3] This is a cross-sectional view showing the exterior wall portion where the existing window frames are installed. [Figure 4] This diagram illustrates the process of removing interior materials, adhesives, and sealants in the repair method for window frames. [Figure 5] This diagram illustrates the process of removing existing trim material in the window frame repair method. [Figure 6] This diagram illustrates the process of removing the existing frame in the window frame repair method. [Figure 7] This diagram illustrates the process of installing a buffer member in the repair method for window sashes. [Figure 8] This diagram illustrates the process of installing a new frame in the window frame renovation method. [Figure 9] This diagram illustrates the process of installing new trim material in the renovation of window frames. [Figure 10] This is a vertical cross-sectional view showing the exterior wall section where the newly installed window frames have been fitted after the renovation work was completed. [Figure 11] This is a cross-sectional view showing the exterior wall section where the newly installed window frames have been fitted after the renovation work was completed. [Figure 12] This is a vertical cross-sectional view showing the exterior wall portion where the newly installed window frame of the modified example has been fitted. [Figure 13] This is a cross-sectional view showing the exterior wall portion where the newly installed window frame of the modified example has been fitted. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is an interior view of the wall unit 10 as seen from the interior side, and Figures 2 and 3 are longitudinal and transverse cross-sectional views of the exterior wall portion to which the wall unit 10 is attached. The wall unit 10 illustrated here is treated as a single structure when installed in a building and includes a sash 1 and a structural opening frame 5, which are building components. In the following description, the left-right direction of the wall unit 10 is defined as the X-axis direction, the up-down direction of the wall unit 10 is defined as the Y-axis direction, and the depth direction (indoor / outdoor direction) of the wall unit 10 is defined as the Z-axis direction. The X, Y, and Z axis directions are orthogonal to each other.

[0010] As shown in Figure 1, the structural opening frame 5 is an opening frame composed of a lintel 51 which is an upper member that demarcates the opening, a window sill 52 which is a lower member, and left and right vertical members 53 and 54. A sash 1 is fixed to the opening of this structural opening frame 5. Sash 1 is an inward-opening window and is an existing sash 1 comprising an existing window frame 2 and an existing sash 3 that is positioned within the existing window frame 2 so as to be openable and closable by hinges 26. The existing window frame 2 is constructed by framing the upper frame 21, lower frame 22, and left and right vertical frames 23, 24 around the perimeter. The existing sash 3 comprises an upper rail 31, lower rail 32, left and right vertical rails 33, 34, and a facing material 35 surrounded by these. Note that in Figures 2 to 11, hatching indicating cross-sections of the main structural members of the existing window frame 2 and existing sash 3 has been omitted for the sake of clarity in the drawings.

[0011] As shown in Figures 2 and 3, the upper frame 21, lower frame 22, and left and right vertical frames 23 and 24 of the existing window frame 2 are formed from frame materials having the same cross-sectional shape. These frame materials are made of extruded profiles of synthetic resin and have a cross-sectional shape corresponding to the window type, which is an inward-opening window. Furthermore, recesses are formed on the outer surface of each frame material, that is, the surface facing the building opening frame 5. Brackets 40, which are positioning members, are provided on the vertical frames 23 and 24. The brackets 40 are metal plates, and the outdoor side is bent along the visible surface of the vertical frames 23 and 24 and screwed into the recesses of the vertical frames 23 and 24 with screws 48, while the indoor side is bent outwards and comes into contact with the stepped portions 532 and 542 of the vertical members 53 and 54 and screwed in with screws 49. By the contact of these brackets 40 with the indoor visible surfaces of the stepped portions 532 and 542, the vertical frames 23 and 24, i.e., the existing window frame 2, are positioned in the visible direction relative to the vertical members 53 and 54, i.e., the building opening frame 5. In this embodiment, the outdoor visible surface of the existing window frame 2 and the outdoor surface of the building opening frame 5 are positioned to be approximately flush. In this embodiment, the bracket 40 is positioned at an intermediate vertical position between the vertical frames 23 and 24, but it may be positioned at multiple locations depending on the height dimensions of the vertical frames 23 and 24. Also, in this embodiment, the upper frame 21 is not provided with a positioning bracket, but for example, if the longitudinal dimension of the upper frame 21 is large, that is, if the left and right width dimensions of the existing window frame 2 are large, a bracket may be provided at an intermediate horizontal position on the upper frame 21. Further, as shown in FIG. 2, a spacer 27 is attached to a recessed portion on the outer peripheral surface of the lower frame 22. Accordingly, a load applied to the lower frame 22 is supported by the window sill 52 via the lower frame 22 and the spacer 27.

[0012] The existing shoji 3 is configured by attaching an upper rail 31, a lower rail 32, and left and right vertical stiles 33, 34 to four circumferences of a rectangular face member 35. The upper rail 31, the lower rail 32, and the left and right vertical stiles 33, 34 are extruded profiles made of synthetic resin having the same cross-sectional shape. The face member 35 is, for example, triple glass. The existing shoji 3 is an inward-opening window configured such that a hinge 26 is provided between the vertical stile 33 located on the left side when viewed from the indoor side and the vertical frame 23, and the existing shoji 3 opens toward the indoor side around a hinge axis extending in the vertical direction. A handle 36 is provided on a facing surface facing the room of the vertical stile 34 located on the right side when viewed from the indoor side.

[0013] As shown in FIG. 1, the building frame opening frame 5 is configured in a frame shape including a lintel 51, the window sill 52, and left and right vertical members 53, 54. Upper end sides of the vertical members 53, 54 extend upward beyond the lintel 51, lower end sides of the vertical members 53, 54 extend downward beyond the window sill 52, and cross members 55, 56 are respectively attached with a horizontal overlapping arrangement between upper ends and between lower ends of the vertical members 53, 54. Vertical crosspieces 57 are respectively attached between the cross member 55 and the lintel 51, and between the window sill 52 and the cross member 56. The lintel 51, the window sill 52, the left and right vertical members 53, 54, the cross members 55, 56, and the vertical crosspieces 57 are made of, for example, wood. As shown in FIG. 2, heat insulating materials 60 are respectively disposed between the upper end cross member 55 and the lintel 51, and between the window sill 52 and the lower end cross member 56. Further, a surface material 58 is attached to an outdoor surface of the building frame opening frame 5. The surface material 58 is formed of a load-bearing surface material such as a particle board obtained by laminating a plurality of wood boards. Note that, depending on the relationship between the height dimension of the wall unit 10 and the height dimension of the sash 1, the building frame opening frame 5 may be configured without providing one or both of the cross members 55, 56.

[0014] As shown in Figure 2, the lintel 51 has a facing surface 511 that faces the opening of the structural frame 5, and a stepped portion 512 is formed on the interior side of the facing surface 511. That is, the lintel 51 has a facing surface 511 that faces the upper frame 21, and a vertical surface and a horizontal surface that extend upward from the interior end of the facing surface 511 and further inward to form the stepped portion 512. The window sill 52 has a facing surface 521 that faces the opening of the structural opening frame 5, and stepped portions 522 and 523 are formed on the indoor and outdoor sides of the facing surface 521. Specifically, the window sill 52 has a facing surface 521 which is the upper surface on which the spacer 27 attached to the lower frame 22 is placed, a stepped portion 522 which is divided by a vertical plane provided downward from the indoor end of the facing surface 521 and a horizontal plane extending inward from the lower end of the vertical plane, and a stepped portion 523 which is divided by a vertical plane provided downward from the outdoor end of the facing surface 521 and a horizontal plane extending outward from the lower end of the vertical plane. A waterproof sheet 59 is attached from the visible surface 521 of the window sill 52 to the exterior surface of the surface material 58 provided on the exterior side of the window sill 52, via the vertical and horizontal planes of the stepped portion 522.

[0015] As shown in Figure 3, the vertical members 53 and 54 have facing surfaces 531 and 541 that face the opening of the structural frame 5, and stepped portions 532 and 542 are formed on the interior side of the facing surfaces 531 and 541. That is, the vertical members 53 and 54 have facing surfaces 531 and 541 that face the vertical frames 23 and 24, and facing surfaces and looking surfaces that extend outward from the interior end of the facing surfaces 531 and 541 in the visible direction, and further extend inward to form stepped portions 532 and 542. The interior end of the bracket 40 described above is bent so as to abut the facing surfaces and looking surfaces of the stepped portions 532 and 542, and is positioned in the looking direction by abutting the facing surfaces, and is fixed to the vertical members 53 and 54 by screws 49 at the portion that abuts the looking surfaces.

[0016] The upper frame 21, lower frame 22, and vertical frames 23 and 24 of the existing window frame 2, which are positioned on the inner circumference side of the structural opening frame 5, are fixed to the lintel 51, window sill 52, and vertical members 53 and 54 with adhesive 61, as shown in Figures 1 to 3. Specifically, the stepped sections 512, 522, 532, and 542 are formed at the same position in the depth direction (Z-axis direction), and the adhesive 61 is filled between the stepped sections 512, 522, 532, and 542 and the interior side ends of the depth surfaces of the upper frame 21, lower frame 22, and vertical frames 23 and 24, and is provided continuously around all four sides along the entire length of the upper frame 21, lower frame 22, and vertical frames 23 and 24. This adhesive 61 filling process is carried out on the manufacturing line of the wall unit 10 and is mechanized, so the adhesive 61 can be filled automatically and uniformly. As described above, the adhesive 61 fixes the existing window frame 2 to the building structure opening frame 5 by continuously sealing the gap on the interior side around all four sides. Therefore, the adhesive 61 firmly fixes the existing window frame 2 to the building structure opening frame 5, and ensures airtightness and watertightness between the building structure opening frame 5 and the existing window frame 2. The adhesive 61 can be any adhesive that can fix the existing window frame 2 to the structural opening frame 5, and various types of adhesives such as hot-melt type, two-component type, and moisture-resistant type can be used. In addition, different types of adhesive 61 may be used depending on the application location.

[0017] As shown in Figures 2 and 3, an upper trim piece 81 and vertical trim pieces 83 and 84 are attached to the exterior surface of the structural opening frame 5. The upper trim piece 81 is configured in a roughly L-shape in cross-section, comprising a fixing piece fixed to the exterior surface of the upper frame 21 with screws 85, and a trim piece extending outward from the fixing piece. Screw holes are formed on the lower surface of the trim piece, and screws (not shown) that connect the vertical trim pieces 83 and 84 to the upper trim piece 81 are screwed into these screw holes. The vertical trim pieces 83 and 84 have a symmetrical and identical cross-sectional shape, and are formed in an L-shape in cross-section, comprising a fixing piece that is fixed to the exterior surface of the vertical frames 23 and 24 with screws 85, and a trim piece that extends outward from the fixing piece.

[0018] As shown in Figure 2, an attachment 86 is fixed to the stepped portion 523 of the window sill 52 with a waterproof sheet 59 in between, and a water drain material 82 is detachably attached to this attachment 86. The attachment 86 has a fixing piece fixed to the visible surface 521 with screws 87, a retaining piece to which an airtight material 88 is attached, and a pair of upper and lower engaging pieces to which a water drain material 82 engages. The airtight material 88 abuts against the lower surface of the lower frame 22 and functions as a watertight material that seals the space between the attachment 86 and the lower frame 22. In addition, screw holes are formed in the attachment 86, and covers 89 (see Figure 3) attached to both end faces of the attachment 86 are fixed with screws that are screwed into the screw holes. The flashing material 82 is attached by engaging with the engaging piece of the attachment 86. The length of the flashing material 82 in the X-axis direction is approximately the same as the length of the attachment 86, and both ends are positioned at the lower ends of the vertical trim pieces 83 and 84. Therefore, the lower ends of the vertical trim pieces 83 and 84 are formed to match the shape of the upper surface of the flashing material 82. As shown in Figure 3, a sealer 77 is placed between the lower ends of the vertical trim pieces 83 and 84 and the upper surface of the flashing material 82. In addition, screw holes are formed in the flashing material 82, and end caps 821 that close the ends of the flashing material 82 are fixed with screws that are screwed into the screw holes.

[0019] As shown in Figures 2 and 3, waterproof tapes 71 and 72 are applied across the exterior surfaces of the upper frame 21, vertical frames 23 and 24, and the surface material 58. The waterproof tapes 71 and 72 prevent water from seeping in between the upper frame 21, vertical frames 23 and 24, and the surface material 58. Also, as shown in Figure 2, a waterproof sheet 73 is applied above the upper trim material 81 to the exterior surface of the surface material 58 and the surface of the waterproof tape 71.

[0020] As shown in Figures 2 and 3, exterior cladding 91, which is provided as an exterior wall material, is attached to the exterior side of the structural opening frame 5 via vertical furring strips 92 and horizontal furring strips 93. The exterior cladding 91 is attached except for the opening portion demarcated by the upper trim 81, flashing 82, and vertical trim 83 and 84. Backup material 75 and sealing material 76 are placed between the opening surface of the exterior cladding 91, i.e., the exterior wall material, and the upper trim 81, flashing 82, and vertical trim 83 and 84. Interior wall material 94 is attached to the interior side of the structural opening frame 5, except for the opening where the sash 1 is placed. In addition, a trim frame 95 is attached to all four sides of the inner surface of the opening of the structural opening frame 5 to trim the interior wall material 94. In other words, the interior wall material 94 and the trim frame 95 are attached to the interior side of the structural opening frame 5 as interior finishing materials.

[0021] [Assembly process for wall units] Next, we will explain the process of assembling the wall unit 10. At the manufacturing plant for sash 1, sash 1 is assembled. Since this assembly method is the same as for a typical sash 1, the explanation is omitted. In the assembly plant for the structural opening frame 5, the lintel 51, window sill 52, left and right vertical members 53, 54, and horizontal members 55, 56 are framed, the surface material 58 is attached, and the insulation material 60 is placed to assemble the structural opening frame 5.

[0022] Next, at the assembly plant for the wall unit 10, the sash 1 and attachment 86 are attached to the structural opening frame 5 to assemble the wall unit 10. The assembly of the wall unit 10 may be carried out at the same factory as the manufacturing plant for the sash 1 and the assembly plant for the structural opening frame 5, or at a different factory. To assemble the wall unit 10, first, a waterproof sheet 59 is attached to the structural opening frame 5, and the attachment 86 with the airtight material 88 and cover 89 attached is fixed to the window sill 52 with screws 87. Next, the bracket 40 is fixed to the existing window frame 2 with screws 48, and the bracket 40 is fixed to the structural opening frame 5 with screws 49 to position the existing window frame 2. Then, the interior side of the existing window frame 2 is fixed to the structural opening frame 5 with adhesive 61. Although the process of dispensing the adhesive 61 can be done manually by an operator, since the wall unit 10 is assembled in the factory, it can be automated using robots or the like.

[0023] [On-site installation work for wall units] The wall unit 10 is completed through the assembly process described above. This wall unit 10 is then transported to the construction site. At this time, the sash 1 is an internally mounted sash that fits within the visible surface of the wall unit 10, and the upper trim material 81, flashing material 82, and vertical trim materials 83, 84 that protrude from the wall unit 10 are not attached. Therefore, multiple wall units 10 can be stacked flat using spacers, improving transportation efficiency. The method for attaching this wall unit 10 to a building such as a house can be the same as in Patent Document 1, so the explanation will be omitted. After installing the wall unit 10 to a house or the like, waterproof tapes 71 and 72 are applied across the surface material 58 and the upper frame 21 and vertical frames 23 and 24, and then the upper trim 81, flashing 82, and vertical trim 83 and 84 are installed. The flashing 82 is installed by engaging it with the attachment 86. The upper trim 81 and vertical trim 83 and 84 are assembled in a three-way configuration with screws and then attached to the upper frame 21 and vertical frames 23 and 24 with screws 85. Furthermore, before installing the wall unit 10 in a house or the like, for example, during the assembly of the wall unit 10 at the factory, or after transporting the wall unit 10 to the construction site and before installing it in the house, the waterproof tapes 71, 72, the top trim 81, the flashing 82, and the vertical trim 83, 84 may be attached to the wall unit 10. Furthermore, after applying waterproof tapes 71, 72 and waterproof sheet 73 to the surfaces of the upper trim 81 and vertical trim 83, 84, vertical furring strips 92 and horizontal furring strips 93 are attached and the exterior material 91 is installed. Then, backup material 75 and sealant 76 are placed to seal the gap between the exterior material 91 and the upper trim 81, flashing 82, and vertical trim 83, 84. Finally, the interior wall material 94 and frame 95 are attached to the interior side of the wall unit 10 to finish it.

[0024] [How to repair window frames] Next, the repair method for sash 1 will be explained with reference to Figures 4 to 11. In Figures 4 to 9, (A) is a vertical cross-sectional view of sash 1 and the structural opening frame 5, and (B) is a horizontal cross-sectional view of the main part. The method for repairing sash 1 involves removing the existing sash 1 from the structural opening frame 5 of the wall unit 10 attached to the building, that is, from the structural opening, and then installing a new sash 1B. First, as shown in Figure 4, an interior material removal step is performed to remove the frame 95, which is an interior material, and an adhesive removal step is performed to cut and remove the adhesive 61 by inserting a cutter or the like into the gap between the structural opening frame 5 and the existing window frame 2. Next, a seal removal step is performed to remove the backup material 75 and sealant 76 from between the exterior material 91 and the upper trim material 81, flashing material 82, and vertical trim materials 83 and 84. Furthermore, the screws 49 that fix the bracket 40 are also removed.

[0025] Next, as shown in Figure 5, an existing trim removal process is performed in which the lower parts of the vertical trim pieces 83 and 84 are bent or cut using a crowbar or the like to remove them. The dotted line in Figure 5(B) indicates the bent portion 83A of the lower end of the trim piece of the vertical trim piece 83. The bending or cutting position of the vertical trim pieces 83 and 84 should be higher than the lower surface of the lower frame 22. Also, since the upper trim piece 81 does not protrude above the upper frame 21, bending or cutting is unnecessary. Next, as shown in Figure 6, the existing frame removal process is performed to remove the existing sash 1 from the building opening frame 5 to the interior side. At this time, the upper trim 81 and the vertical trim 83 and 84 are removed together with the existing window frame 2 while they are still attached to it. Next, remove the screws securing the attachment 86 and detach the flashing material 82 and attachment 86 from the structural opening frame 5. If it is determined that the flashing material 82 and attachment 86 do not need to be replaced, leave them attached to the structural opening frame 5. If it is determined that only the flashing material 82 needs to be replaced and the attachment 86 does not need to be replaced, then only the flashing material 82 should be removed from the attachment 86.

[0026] Next, as shown in Figure 7, a buffer member installation process is performed in which buffer members are attached to the visible surfaces 511, 531, and 541 of the lintel 51 and vertical members 53 and 54. In this embodiment, sealing tape 70 is used as the buffer member, and in the buffer member installation process, the sealing tape 70, which is the buffer member, is attached to the lintel 51 and vertical members 53 and 54. The sealing tape 70 is a tape-shaped sealing material that has a thickness that can fill the gap between the visible surfaces 511, 531, and 541 of the lintel 51 and vertical members 53 and 54 and the visible surfaces of the upper frame 21B and vertical frames 23B and 24B of the newly installed window frame 2B, which will be described later, and has an adhesive surface that can be fixed to the visible surfaces 511, 531, and 541 of the lintel 51 and vertical members 53 and 54. The sealing tape 70 is made of polyurethane or the like and is placed between the lintel 51, vertical members 53 and 54 and the upper frame 21B, vertical frames 23B and 24B of the new window frame 2B, providing a buffer function to prevent them from colliding with each other. Furthermore, the sealing tape 70 also has the function of sealing the space between the lintel 51, vertical members 53 and 54 and the upper frame 21B, vertical frames 23B and 24B of the new window frame 2B, that is, ensuring watertightness and airtightness. The sealing tape 70 has a width dimension from the opening end face of the surface material 58 to the interior edge of the depth surfaces 511, 531, and 541, and a length dimension that allows it to be continuously applied to the lintel 51 and vertical members 53 and 54. Figure 7(B) shows the sealing tape 70 applied to the lintel 51 and vertical members 53 and 54. Furthermore, when replacing attachment 86, the newly installed attachment 86B, with the airtight seal 88B and cover 89B attached, is placed on the stepped portion 523 of the window sill 52 and secured with screws 87.

[0027] Next, as shown in Figure 8, the worker places the newly installed sash 1B around the inner circumference of the opening of the structural opening frame 5 and performs the new frame installation process, which involves fixing the newly installed window frame 2B to the structural opening frame 5. The newly installed sash 1B is comprised of a newly installed window frame 2B and a newly installed sash 3B. As shown in Figures 10 and 11, the newly installed window frame 2B, like the existing window frame 2, comprises an upper frame 21B, a lower frame 22B, and vertical frames 23B and 24B, and a rectangular tubular metal reinforcing member 28 is inserted into the hollow portions of at least the upper frame 21B and the lower frame 22B. Through holes for inserting screws 100 are pre-formed on the inner circumferential surface of the newly installed window frame 2B and on the opposing surface of the reinforcing member 28 facing this inner circumferential surface. Furthermore, the newly installed shoji screen 3B, like the existing shoji screen 3, is constructed with an upper frame 31B, a lower frame 32B, vertical frames 33B and 34B, a facing material 35B, and a handle 36B, and is attached to the newly installed window frame 2B by a hinge 26B so that it can open inward.

[0028] In the new frame installation process, brackets 40B are attached to the vertical frames 23B and 24B of the new window frame 2B with screws 48, and the bent portion of the indoor end of bracket 40B is brought into contact with the stepped portions 532 and 542 of the vertical members 53 and 54 and secured with screws 49. Next, screws 100 are inserted from the inner circumference of the upper frame 21B and lower frame 22B, and the screws 100 are screwed into the lintel 51 and window sill 52 via the reinforcing material 28. As a result, the newly installed window frame 2B is fixed to the structural opening frame 5 by screws 100 while being positioned in the depth direction by the bracket 40. In this case, the lower frame 22B of the newly installed window frame 2B is placed on the visible surface 521 of the window sill 52 via a spacer 27B, and the lower surface of the lower frame 22B is sealed by contacting the airtight material 88B of the attachment 86B. The upper frame 21B and vertical frames 23B and 24B are sealed by being in close contact with the sealing tape 70. The sealing tape 70 is fixed to the visible surfaces 511, 531, and 541 of the lintel 51 and vertical members 53 and 54, and is in contact with the visible surfaces of the upper frame 21B and vertical frames 23B and 24B, thereby ensuring watertightness and airtightness between the lintel 51 and vertical members 53 and 54 and the upper frame 21B and vertical frames 23B and 24B.

[0029] Next, as shown in Figure 9, the process of installing new trim pieces is carried out, which involves installing the new upper trim piece 81B, flashing piece 82B, and vertical trim pieces 83B and 84B. The flashing piece 82B is installed by engaging it with the engaging piece of the attachment 86B with the end cap 821B attached. The upper trim piece 81B and vertical trim piece 83B are fixed to the upper frame 21B, vertical frame 23B and 24B with screws 85, with the three sides framed and the sealer 77B in place.

[0030] Next, as shown in Figures 10 and 11, an exterior wall sealing process is performed in which new backing material 75B and sealant 76B are filled between the opening surface of the exterior material 91, i.e., the exterior wall material, and the upper trim material 81B, flashing material 82B, and vertical trim materials 83B and 84B to seal the exterior wall. In addition, an interior material installation process is performed in which new frames 95B, which are interior materials, are attached to the stepped sections 512, 522, 532, and 542 of the lintel 51, window sill 52, and vertical members 53 and 54. With these steps completed, the renovation to the new sash 1B is finished. The newly installed sash 1B differs from the existing sash 1 in that the upper frame 21B and lower frame 22B are fixed to the structural opening frame 5 with screws 100, and airtightness and watertightness between the upper frame 21B, vertical frames 23B and 24B and the lintel 51 and vertical members 53 and 54 are ensured by sealing tape 70.

[0031] [Effects of the Embodiment] According to this embodiment, since the existing window frame 2 and the new window frame 2B do not have nail fins or the like that contact the visible surface of the structural opening frame 5 from the outside, the sash 1 can be removed from the interior side of the structural opening frame 5, and the sash 1B can be installed from the interior side. Therefore, since it is not necessary to remove or destroy the exterior material 91 when repairing the sash, the existing sash 1 can be repaired with the new sash 1B in a short period of time and at low cost. In addition, since the process of removing the existing frame to remove the existing sash 1 and the process of installing the new frame to install the new sash 1B can be performed from the interior side of the structural opening frame 5, the workability and safety during sash repair can be improved. Furthermore, at construction sites where window frame renovation work is being carried out, sealing tape 70 is applied to the lintel 51 and vertical members 53 and 54, and the upper frame 21 and vertical frames 23 and 24 of the newly installed window frame 2B are brought into contact with this sealing tape 70 to ensure watertightness and airtightness. This improves the efficiency of renovation work compared to when wet sealing material is used to fill the gaps between the lintel 51, vertical members 53 and 54 and the upper frame 21 and vertical frames 23 and 24 during renovation to ensure watertightness and airtightness. In addition, because sealing tape 70 is used, the quality of watertightness and airtightness can be stabilized compared to when wet sealing material is used.

[0032] Because the sealing tape 70 has a large depth dimension from the opening in the surface material 58 to the interior end of the depth surfaces 511, 531, and 541, watertightness and airtightness can be easily improved by placing the sealing tape 70 along the depth direction between the depth surfaces 511, 531, and 541 of the lintel 51 and vertical members 53 and 54, and the upper frame 21 and vertical frames 23 and 24. Furthermore, since the sealing tape 70 can be continuously applied to three sides of the lintel 51 and vertical members 53 and 54, it can be easily installed at the renovation site, improving work efficiency during renovation.

[0033] The newly installed window frame 2B is positioned in the depth direction by the bracket 40B and fixed to the vertical members 53 and 54 with screws 49, and fixed to the lintel 51 and window sill 52 with screws 100, so that it can be firmly fixed to the structural opening frame 5. In particular, by placing a reinforcing member 28 on the newly installed window frame 2B and locking the heads of the screws 100 into this reinforcing member 28, the fixing strength by the screws 100 can be improved, and the strength of the newly installed window frame 2B itself can also be improved.

[0034] [Differentiation] The present invention is not limited to the configurations described in the embodiments above, and any modifications that can achieve the objectives of the present invention are included in the present invention. For example, the cushioning member is not limited to the sealing tape 70, but can be anything that can seal the gap between the structural opening frame 5 and the newly installed window frame 2B, such as a sponge. Also, the cushioning member such as the sealing tape 70 is not limited to being provided continuously on three sides of the lintel 51 and vertical members 53 and 54 of the structural opening frame 5, but may be provided continuously on all four sides, including the window sill 52. Furthermore, the cushioning member such as the sealing tape 70 is not limited to having a length that is provided continuously on three sides of the lintel 51 and vertical members 53 and 54, but may be provided on each of the lintel 51 and vertical members 53 and 54 separately. Furthermore, cushioning materials such as sealing tape 70 are not limited to those attached to the structural opening frame 5 side, such as the lintel 51 and vertical members 53 and 54, but may also be attached to the newly installed window frame 2B side.

[0035] After the new frame installation process and before the interior material installation process, a sealing material filling process may be performed, as shown in Figure 12, in which sealing material 61B is filled from the interior side between at least the window sill 52, which is the lower material, and the lower frame 22 of the new window frame 2B. That is, as shown in Figure 12, a sealing material filling process may be performed, in which wet sealing material 61B is filled from the interior side between at least the interior end of the lower frame 22 and the stepped portion 522 of the window sill 52, in order to improve airtightness and watertightness. This sealing material 61B is not limited to the space between the lower frame 22 and the window sill 52, but may also be provided between the upper frame 21, vertical frames 23, 24 of the new window frame 2B and the lintel 51, vertical members 53, 54, which are the upper materials, as shown in Figures 12 and 13. By providing sealing material 61B that is continuous on all four sides of the interior side of the new window frame 2B, the watertightness and airtightness of the new window frame 2B can be improved.

[0036] In the process of removing the existing frame, the existing sash 3 may be removed from the existing window frame 2, and then the existing window frame 2 may be removed from the structural opening frame 5. Alternatively, in the process of installing the new frame, the new window frame 2B may be installed on the structural opening frame 5, and then the new sash 3B may be installed on the new window frame 2B.

[0037] The existing sash 1 and the newly installed sash 1B are not limited to being made of synthetic resin, but may also be made of extruded metal profiles such as aluminum. The existing sash 1 and the newly installed sash 1B are not limited to inward-opening windows, but can utilize various types of windows, such as fixed windows, outward-opening windows, and double-hung windows. In the case of a fixed window, the frame material that holds the glass is directly fixed to the structural opening frame 5, so the frame material becomes the frame itself. Furthermore, the newly installed sash 1B may be of the same window type and material as the existing sash 1, but it may also be of a different window type and material.

[0038] [summary] The present invention relates to a method for repairing a window sash, which involves replacing an existing window frame with a new window frame, the existing window frame being attached to an opening frame that is configured to be located on the interior side of an exterior wall material and comprises an upper member, a lower member, and left and right vertical members that define an opening, and comprising: an existing frame removal step of removing the existing window frame from the opening frame to the interior side; a buffer member attachment step of attaching buffer members to at least the upper member and left and right vertical members of the opening frame, or to at least the upper frame and left and right vertical members of the new window frame; a new frame attachment step of attaching the new window frame to the opening frame from the interior side and sealing the space between the opening frame and the new window frame with the buffer members; and an interior material installation step of installing interior material on the interior side of the new window frame. According to the present invention, since the existing window frame is removed to the interior side and the new window frame is installed from the interior side, the sash can be renovated without removing or damaging the exterior wall material. Furthermore, after removing the existing window frame, a buffer member is attached to at least the upper member and left and right vertical members of the upper member, lower member, and left and right vertical members that partition the opening, or to at least the upper frame and left and right vertical frames of the new window frame. Therefore, when the lower frame of the new window frame is placed on the lower member of the opening frame, the gaps that occur between the upper member and left and right vertical members, and between the upper frame and left and right vertical frames can be sealed with the buffer member, thereby improving watertightness and airtightness.

[0039] In the window frame repair method of the present invention, it is preferable that the cushioning member installation step involves attaching the cushioning member to the visible surfaces of the upper member and the vertical member, and the new frame installation step involves bringing the visible surfaces of the upper frame and the left and right vertical frames of the new window frame into contact with the cushioning member and attaching the new window frame to the opening frame. Since the cushioning member is attached to the depth surfaces of the upper and vertical members and is in contact with the depth surfaces of the upper and vertical frames of the new window frame, the width dimension of the cushioning member in the depth direction can be made to be approximately the same as the depth dimension of the opening frame and the new window frame. As a result, sufficient depth can be secured between the adhesive surface of the opening frame and the cushioning member, and between the contact surface of the cushioning member and the new window frame, ensuring sufficient watertightness and airtightness. Furthermore, since the buffer member can be positioned between the facing surface of the opening frame and the facing surface of the new window frame, there is no need to provide overlapping protrusions on the opening frame and the new frame in the facing direction. This allows the existing window frame and the new window frame to be easily removed or installed from the interior side of the opening frame, improving the efficiency of renovation work.

[0040] In the window frame repair method of the present invention, it is preferable that the existing window frame and the new window frame have positioning members that abut against the interior surface of the opening frame. Existing and new window frames do not have nail fins or the like that are placed between the exterior wall and the opening frame so that they can be removed from the interior side or installed from the interior side. Therefore, it is not possible to position them in the depth direction relative to the opening frame using nail fins. In contrast, in the present invention, existing and new window frames have positioning members that abut the interior surface of the opening frame, so they can be easily positioned in the depth direction relative to the opening frame.

[0041] In the window frame repair method of the present invention, it is preferable that an existing trim piece is attached to the existing window frame facing the opening surface of the exterior wall material, a sealant is filled between the opening surface of the exterior wall material and the existing trim piece, and that before the existing frame removal step, the method includes a sealant removal step of removing the sealant and an existing trim piece removal step of removing the portion of the existing trim piece that overlaps with the opening frame in the depth direction. Since the sealant removal process and the removal of existing trim material are performed before the removal of the existing frame, it is possible to prevent the sealant and existing trim material from becoming an obstacle when removing the existing window frame to the interior side, and the existing window frame can be easily removed. In addition, since the existing trim material is attached to the existing window frame, it can be removed together with the existing window frame during renovation.

[0042] In the window frame repair method of the present invention, it is preferable to have a new trim material installation step after the new frame installation step, in which a new trim material is installed on the new window frame. Because the process includes a step for installing new trim, the trim can be installed when renovating with a new window frame. Furthermore, since the new trim is attached to the new window frame after it has been attached to the opening frame, the new trim can be easily positioned and installed relative to the opening in the exterior wall material.

[0043] In the window frame repair method of the present invention, the existing window frame is fixed to the opening frame with adhesive, and it is preferable to have an adhesive removal step to remove the adhesive before the existing frame removal step. The adhesive used to secure the existing window frame can be easily cut and removed with a cutting tool such as a utility knife. This improves the work efficiency during renovations compared to cases where the existing window frame is fixed to the opening frame with multiple screws.

[0044] In the window frame repair method of the present invention, it is preferable that the cushioning member installation step involves continuously attaching the cushioning member to three sides of the opening frame, namely the upper member and the left and right vertical members, or to three sides of the newly installed window frame, namely the upper frame and the left and right vertical frames. By attaching buffer members to three sides of the top member and the left and right vertical members, or to three sides of the top frame and left and right vertical frames of the newly installed window frame, buffer members can be easily attached to the opening frame or new window frame at the construction site, thereby improving on-site work efficiency.

[0045] In the window frame repair method of the present invention, it is preferable that an attachment is placed on the lower material, and that the space between the attachment and the lower frame of the existing window frame or the new window frame is sealed with a waterproofing material. By placing an attachment on the base material and sealing the gap between this attachment and the base frame with a waterproofing material such as AT material, watertightness and airtightness can be ensured by the waterproofing material without the need to place a buffer member on the base material. Furthermore, since the waterproofing material can be attached to the attachment in advance, the amount of work required for window frame repair can also be reduced.

[0046] In the window frame repair method of the present invention, it is preferable to have a sealing material filling step in which sealing material is filled from the interior side between at least the lower material and the lower frame of the new window frame, after the new frame installation step and before the interior material installation step. By filling the gap between the base material and the bottom frame of the new window frame with sealant, the watertightness and airtightness between the base material and the bottom frame can be improved when a buffer member is not attached to the base material. Furthermore, if the sealant is continuously filled around all four sides between the opening frame and the new window frame, the watertightness and airtightness can be further improved by providing sealant in addition to a buffer member. [Explanation of symbols]

[0047] 1...Sash, 1B...Sash, 2...Existing window frame, 2B...New window frame, 3...Existing sash, 3B...New sash, 5...Structural opening frame, 10...Wall unit, 21...Upper frame, 21B...Upper frame, 22...Lower frame, 22B...Lower frame, 23...Vertical frame, 23B...Vertical frame, 24...Vertical frame, 24B...Vertical frame, 26...Hinge, 26B...Hinge, 27...Spacer, 27B...Spacer, 28...Reinforcement material, 31...Upper frame 31B...Top frame, 32...Bottom frame, 32B...Bottom frame, 33...Vertical frame, 33B...Vertical frame, 34...Vertical frame, 34B...Vertical frame, 35...Face material, 35B...Face material, 36...Handle, 36B...Handle, 40...Bracket, 40B...Bracket, 51...Lindle, 52...Window sill, 53...Vertical member, 54...Vertical member, 58...Surface material, 59...Waterproof sheet, 61...Adhesive, 70...Sealing tape, 7 1...Waterproof tape, 72...Waterproof tape, 73...Waterproof sheet, 75...Backup material, 75B...Backup material, 76...Sealant, 76B...Sealant, 77...Sealer, 77B...Sealer, 81...Top trim, 81B...Top trim, 82...Drip edge, 82B...Drip edge, 83...Vertical trim, 83B...Vertical trim, 84...Vertical trim, 84B...Vertical trim, 86...Attachment, 86B...Attachment, 88...Airtight material, 88B...Airtight material, 91...Exterior material, 92...Vertical furring strip, 93...Horizontal furring strip, 94...Interior wall material, 95...Picture frame, 95B...Picture frame, 100...Screw, 511...Face, 512...Step, 521...Face, 522...Step, 523...Step, 531...Face, 532...Step, 541...Face, 542...Step.

Claims

1. A method for repairing a window sash, which involves replacing an existing window frame with a new window frame, the existing window frame being attached to an opening frame that is located on the interior side of an exterior wall material and is composed of an upper member, a lower member, and left and right vertical members that partition the opening, The process of removing the existing window frame from the opening frame to the interior side, A cushioning member installation step involves attaching a cushioning member to at least the upper member and the left and right vertical members of the opening frame, or to at least the upper frame and the left and right vertical frames of the newly installed window frame. A new frame installation step involves attaching the new window frame to the opening frame from the interior side, and sealing the space between the opening frame and the new window frame with the buffer member. The interior finishing process involves installing interior finishing materials on the interior side of the newly installed window frame. A method for repairing window frames, characterized by having [a certain feature].

2. In the method for repairing a window frame according to claim 1, The cushioning member mounting step involves attaching the cushioning member to the visible surface of the upper member and the vertical member. The aforementioned new frame installation step involves attaching the new window frame to the opening frame by bringing the top frame and the left and right vertical frames of the new window frame into contact with the buffer member. A method for repairing window frames, characterized by the following features.

3. In the method for repairing a window frame according to claim 1, The existing window frame and the new window frame have positioning members that abut against the interior surface of the opening frame. A method for repairing window frames, characterized by the following features.

4. In the method for repairing a window frame according to claim 1, An existing trim piece is attached to the existing window frame, facing the opening surface of the exterior wall material. A sealant is filled between the opening surface of the exterior wall material and the existing trim material. Before the process of removing the existing frame, A seal removal step to remove the aforementioned sealant, The process of removing the existing trim material, which involves removing the portion of the existing trim material that overlaps with the opening frame in the depth direction, A method for repairing window frames, characterized by having [a certain feature].

5. In the method for repairing a window frame according to claim 1, After the aforementioned new frame installation process, The process of installing new trim on the aforementioned new window frame is as follows: A method for repairing window frames, characterized by having [a certain feature].

6. In the method for repairing a window frame according to claim 1, The existing window frame is fixed to the opening frame with adhesive. Prior to the removal of the existing frame, an adhesive removal step is performed to remove the adhesive. A method for repairing window frames, characterized by having [a certain feature].

7. In the method for repairing a window frame according to claim 1, The cushioning member installation step involves continuously attaching the cushioning member to three sides of the opening frame, the upper member and the left and right vertical members, or to three sides of the new window frame, the upper frame and the left and right vertical frames. A method for repairing window frames, characterized by the following features.

8. In the method for repairing a window frame according to claim 1, An attachment is placed on the aforementioned base material. The space between the attachment and the lower frame of the existing window frame or the new window frame is sealed with a waterproofing material. A method for repairing window frames, characterized by the following features.

9. In the method for repairing a window frame according to claim 1, After the new frame installation step and before the interior material installation step, there is a sealing material filling step in which sealing material is filled from the interior side between at least the base material and the lower frame of the new window frame. A method for repairing window frames, characterized by the following features.

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