Composite sash frame, main frame and sash repair method

Abstract

To provide a composite sash frame, a main frame, and a sash refurbishment method, all of which are configured to prevent an inner opening from becoming smaller even upon sash replacement, and also prevent damage to the exterior walls of a building even upon sash replacement.SOLUTION: A composite sash frame of the present invention includes a main frame has an inner-frame surface that demarcates an opening in which a panel member can be disposed and a fixed frame that can be attached to the main frame and fixed to a building skeleton, and the main frame does not have a portion protruding outwardly from the outer surface of the frame and fixed to the building skeleton.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a composite sash frame, a main frame, and a sash renovation method. [Background technology]

[0002] Conventionally, sash frames installed in building openings have been dedicated frames that are tailored to the building structure, such as wooden or reinforced concrete. Patent Document 1 describes this type of sash frame. In the sash frame described in Patent Document 1, a plate-shaped portion is inserted into the back side of the exterior material of the exterior wall. This plate-shaped portion is fixed to a pillar material with screws. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-035308 Summary of the Invention [Problem to be solved by the invention]

[0004] The sash frame described in Patent Document 1 has a plate-shaped portion that fits into the exterior wall and is fixed to a pillar. Therefore, when replacing the sash frame, it is necessary to destroy the exterior wall, such as by removing the exterior material. In response to this, a cover construction method is known in which the existing sash frame is left in place and a new sash frame is added. This cover construction method can reduce damage to the exterior wall.

[0005] However, the cover method has the problem that the inside opening tends to become smaller because the existing sash frame is left in place and a new sash frame is added.

[0006] The present invention aims to provide a composite sash frame, a main frame, and a sash renovation method that are configured to prevent the inner opening from becoming smaller even when the sash is replaced, and that can suppress damage to the exterior wall of a building even when the sash is replaced. [Means for solving the problem]

[0007] A composite sash frame according to a first aspect of the present invention comprises a main frame having an inner frame surface that defines an opening into which a panel material can be placed, and a fixed frame that can be attached to the main frame and is fixed to the building's skeleton, and the main frame does not have a portion that protrudes outward from the outer surface of the frame and is fixed to the building's skeleton.

[0008] In one embodiment of the present invention, the fixed frame comprises a fixed portion that is fixed to the main body of the building, and an attachment portion that is attached to the main body frame in a state in which the fixed portion protrudes from the outer surface of the main body frame in the out-of-plane direction.

[0009] In one embodiment of the present invention, the fixing portion is a fixing plate-shaped portion disposed between an exterior member and an interior member of the exterior wall of the building.

[0010] In one embodiment of the present invention, the mounting portion is a mounting plate portion that is attached to the main body frame in a state where it is stacked on the outer surface of the main body frame.

[0011] In one embodiment of the present invention, the main body frame is made of resin.

[0012] In one embodiment of the present invention, the fixing frame is made of aluminum.

[0013] In one embodiment of the present invention, the fixed frame includes a cover portion that covers the outdoor side surface of the main body frame.

[0014] A second aspect of the present invention is a main frame having an inner frame surface that defines an opening in which a panel material can be placed, and which can be attached to a fixed frame that is fixed to the building's main body, and which does not have a part that protrudes outward from the outer surface of the frame and is fixed to the building's main body.

[0015] A third aspect of the present invention is a sash renovation method for replacing a main frame having an inner frame surface that defines an opening in which a panel material can be placed, wherein the main frame does not have a portion that protrudes outward from the outer frame surface and is fixed to the building's skeleton, and the existing main frame is removed from a fixed frame that is fixed to the building's skeleton, and a new main frame is attached to the fixed frame. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a composite sash frame, a main frame, and a sash renovation method that are configured to prevent the inner opening from becoming smaller even when the sash is replaced, and that can suppress damage to the exterior wall of the building even when the sash is replaced. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a cross-sectional view showing a horizontal cross section of a composite sash frame according to one embodiment of the present invention, which includes a main body frame according to one embodiment of the present invention. [Figure 2] 2 is a cross-sectional view showing a vertical cross section of the composite sash frame shown in FIG. 1. FIG. [Figure 3] 2 is a cross-sectional view showing a horizontal cross section of a composite sash frame according to one embodiment of the present invention, which is applied to an exterior wall structure different from that shown in FIG. 1. FIG. [Figure 4] 4 is a cross-sectional view showing a vertical cross section of the composite sash frame shown in FIG. 3. FIG. [Figure 5] 2 is a cross-sectional view showing a horizontal cross section of a composite sash frame according to one embodiment of the present invention, which is applied to an exterior wall structure different from that shown in FIG. 1. FIG. [Figure 6] 6 is a cross-sectional view showing a vertical cross section of the composite sash frame shown in FIG. 5. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of a composite sash frame, a main frame, and a sash repair method according to the present invention will be described with reference to the drawings. In each drawing, the same reference numerals are used to designate common components.

[0019] Figures 1 and 2 are cross-sectional views showing a composite sash frame 100 according to one embodiment of the present invention. Figure 1 is a cross-sectional view showing a horizontal cross section of an exterior wall 200 on which the composite sash frame 100 is arranged. Figure 2 is a cross-sectional view showing a vertical cross section of the exterior wall 200 on which the composite sash frame 100 is arranged. For ease of explanation, Figure 2 shows only the vicinity of the lower end of the composite sash frame 100 in the vertical direction.

[0020] As shown in FIGS. 1 and 2, a composite sash frame 100 of this embodiment is provided in an opening 200 a in an exterior wall 200 of a building 1 .

[0021] The building 1 is a wooden house constructed by a conventional construction method. Therefore, the exterior wall 200 includes a pillar member 201, an exterior member 202, a heat insulating member 203, and an interior member 204.

[0022] The pillar members 201 form the skeleton of the building 1. The building 1 has a framework structure made up of the pillar members 201 and beam members (not shown).

[0023] The exterior member 202 constitutes the exterior surface (hereinafter referred to as the "exterior surface") of the exterior wall 200. For example, metal or ceramic siding, extruded cement board, or wood panel can be used as the exterior member 202. This exterior member 202 is connected to the periphery of the framework. This allows for the formation of an exterior skin layer that includes the outer surface of the exterior wall 200.

[0024] Furthermore, as the heat insulating member 203, for example, a panel-shaped heat insulating material made of a foamed resin material such as phenol foam, polystyrene foam, or urethane foam, as well as a fiber-based heat insulating material such as rock wool, can also be used. The heat insulating member 203 is arranged, for example, on the indoor side of the exterior member 202, along the indoor side surface of the exterior member 202 (hereinafter referred to as the "inner surface"). This allows a heat insulating layer of the exterior wall 200 to be formed.

[0025] For example, gypsum board can be used as the interior member 204. The interior member 204 may have a configuration in which another interior material is laminated on the indoor side of the gypsum board. By connecting the interior member 204 to the indoor side of the heat insulating member 203, an inner skin layer of the exterior wall 200 can be formed.

[0026] 1 and 2, a furring strip 205 is formed between the pillar member 201 and the exterior member 202. Also, as shown in Fig. 2, a window sill 206 is provided vertically below the opening 200a in the exterior wall 200, connecting the pillar members 201 located on both sides of the opening 200a in the horizontal direction. Furthermore, a window lintel (not shown) is provided vertically above the opening 200a in the exterior wall 200, connecting the pillar members 201 located on both sides of the opening 200a in the horizontal direction. Also, in Fig. 1, the airtightness line of the exterior wall 200 is indicated by a dashed line.

[0027] 1, an opening 200a penetrating through the thickness direction is formed in the exterior wall 200. Hereinafter, the composite sash frame 100 arranged in this opening 200a will be described in detail.

[0028] As shown in Figures 1 and 2, composite sash frame 100 comprises main frame 10 and fixed frame 20. Frame inner surface 11 of main frame 10 defines opening 10a in which panel material 30 such as a shoji screen can be placed. Furthermore, main frame 10 does not have a portion that protrudes from frame outer surface 12 in an out-of-plane direction (outward to the left and right in Figure 1, and downward in Figure 2) and is fixed to column member 201 that serves as the skeleton of building 1.

[0029] The fixed frame 20 can be attached to the main body frame 10. The fixed frame 20 is fixed to the skeleton of the building 1. As shown in Fig. 1, the fixed frame 20 of this embodiment is fixed to a column member 201, which is the skeleton of the building 1, with a fastening member 207 such as a screw.

[0030] Because the composite sash frame 100 includes the main frame 10 and the fixed frame 20 described above, when replacing the sash during renovations or other such activities, the main frame 10 can be removed from the fixed frame 20 without removing the fixed frame 20 from the building 1. In other words, the main frame 10 can be replaced while leaving the fixed frame 20 fixed to the column members 201 that form the building's framework. Replacing the main frame 10 reduces the likelihood of the inner opening 10a becoming smaller than in the configuration before the sash replacement. Furthermore, even in a configuration in which the fixed frame 20 is fixed to the column members 201 on the indoor side of the exterior members 202 as shown in FIG. 1 , there is no need to remove the exterior members 202 in order to remove the fixed frame 20 from the column members 201. In other words, damage to the exterior wall 200 of the building 1 can be reduced even when replacing the sash.

[0031] As described above, since the composite sash frame 100 is equipped with the above-mentioned main frame 10 and fixed frame 20, the inner opening 10a is less likely to become smaller even when the sash is replaced, and damage to the exterior wall 200 of the building 1 can be suppressed even when the sash is replaced.

[0032] Hereinafter, the composite sash frame 100 of this embodiment will be described in further detail with reference to FIGS.

[0033] The main frame 10 of this embodiment may be a rectangular frame body composed of two horizontal frames 41 positioned vertically above and below and two vertical frames 42 positioned horizontally to the left and right, as viewed from the indoor or outdoor side. The inner frame surface 11 of the main frame 10 of this embodiment is composed of the opposing inner surfaces of the two horizontal frames 41 and the opposing inner surfaces of the two vertical frames 42. As shown in Figures 1 and 2, the opening 10a defined by the inner frame surface 11 is fitted with movable outer and inner panels 30a and 30b. The outer panel 30a is made up of a frame 30a1 and a glass panel 30a2. The inner panel 30b is made up of a frame 30b1 and a glass panel 30b2. However, the configuration of the panels 30 arranged in the opening 10a is not particularly limited. For example, a fixed-fit panel 30 may be arranged in the opening 10a.

[0034] The frame outer surface 12 of the main body frame 10 of this embodiment is composed of the non-opposing outer surfaces of two main body horizontal frames 41 and the non-opposing outer surfaces of two main body vertical frames 42. As shown in Figures 1 and 2, the outer surfaces of the main body horizontal frames 41 of this embodiment are composed of planes extending vertically. Furthermore, the outer surfaces of the main body vertical frames 42 of this embodiment are composed of planes extending horizontally. In other words, the frame outer surface 12 of this embodiment is composed of four planes. In this way, the frame outer surface 12 of the main body frame 10 does not have any parts that protrude outward from the plane of the frame outer surface 12.

[0035] More specifically, the main body horizontal frames 41 do not have any parts that protrude outward in the vertical direction (vertically upward for the main body horizontal frames 41 positioned vertically upward, and vertically downward for the main body horizontal frames 41 positioned vertically downward). Furthermore, the main body vertical frames 42 do not have any parts that protrude outward in the horizontal direction (horizontally left for the main body vertical frames 42 positioned horizontally left in a front view of the main body frame 10, and horizontally right for the main body vertical frames 42 positioned horizontally right in a front view of the main body frame 10). The protruding parts are, for example, parts such as the fixed plate-shaped portion 21a of the fixed frame 20, which has the vertical direction as its in-plane direction and the thickness direction of the exterior wall 200 as its thickness direction.

[0036] In addition, the outdoor side surface 13 of the main body frame 10 of this embodiment is covered by a cover portion 23 (described later) of the fixed frame 20. Furthermore, the indoor side surface 14 of the main body frame 10 of this embodiment covers an interior member 204.

[0037] The material of the main frame 10 is not particularly limited. Therefore, the main frame 10 can be made of metal, such as aluminum, resin, or a combination of these materials. However, the main frame 10 is preferably made of resin. Because the fixed frame 20 described above is fixed to a skeleton within the exterior wall 200 of the building 1, its shape may vary depending on the exterior wall structure of the building 1. Conversely, by providing a common receiving portion capable of receiving the main frame 10 on any fixed frame 20 whose shape varies depending on the exterior wall structure of the building 1, the shape of the main frame 10 can be made constant regardless of the exterior wall structure of the building 1. In this way, if the shape of the main frame 10 can be made constant regardless of the exterior wall structure of the building 1, manufacturing costs can be reduced even if the main frame 10 is made of resin, which is more expensive than aluminum. Furthermore, using resin for the main frame 10 can improve insulation performance compared to aluminum.

[0038] The fixed frame 20 of this embodiment includes a fixed portion 21, an attachment portion 22, and a cover portion 23. The fixed portion 21 is fixed to the skeleton of the building 1. As shown in FIG. 1, in this embodiment, the fixed portion 21 is fixed to a column member 201, which is the skeleton of the building 1, with a fastening member 207 such as a screw. Note that, as shown in FIG. 2, the fixed portion 21 of this embodiment is also fixed to a window sill 206 with a fastening member 207 such as a screw.

[0039] The fixing portion 21 of this embodiment is a fixing plate-shaped portion 21a arranged between an exterior member 202 and an interior member 204 of an exterior wall 200 of the building 1. More specifically, as shown in FIG. 1 , the fixing plate-shaped portion 21a as the fixing portion 21 of this embodiment is arranged between the exterior member 202 of the exterior wall 200 of the building 1 and a column member 201 on the horizontal outer side of the main body frame 10. Furthermore, as shown in FIG. 2 , the fixing plate-shaped portion 21a as the fixing portion 21 of this embodiment is arranged between the exterior member 202 of the exterior wall 200 of the building 1 and a window lintel or window sill 206 on the vertical outer side of the main body frame 10. Note that, as shown in FIGS. 1 and 2 , the fixing plate-shaped portion 21a of this embodiment is arranged such that the vertical direction is the in-plane direction and the thickness direction of the exterior wall 200 is the thickness direction. In this embodiment, the portion of the fixed plate portion 21a that is outside the horizontal main body frame 41 of the main body frame 10 is a strip-shaped portion that extends in the extension direction of the horizontal main body frame 41. In addition, the portion of the fixed plate portion 21a that is outside the vertical main body frame 42 of the main body frame 10 is a strip-shaped portion that extends in the extension direction of the vertical main body frame 42.

[0040] As shown in FIGS. 1 and 2, a fixing plate portion 21a serving as the fixing portion 21 in this embodiment is fixed to a column member 201 serving as the skeleton of a building 1 between an exterior member 202 and an interior member 204 of an exterior wall 200.

[0041] The mounting portion 22 is attached to the main body frame 10 with the fixing portion 21 protruding outward from the frame outer surface 12 of the main body frame 10. The mounting portion 22 is a mounting plate portion 22a that is attached to the main body frame 10 while being stacked on the frame outer surface 12 of the main body frame 10. The mounting plate portion 22a serving as the mounting portion 22 in this embodiment extends on and along the frame outer surface 12 of the main body frame 10. More specifically, the portion of the mounting plate portion 22a in this embodiment that is disposed on the outer surface of the horizontal main body frame 41 of the main body frame 10 is a strip-shaped portion that is stacked on the outer surface of the horizontal main body frame 41 and extends in the extension direction of the horizontal main body frame 41. Furthermore, the portion of the mounting plate portion 22a in this embodiment that is disposed on the outer surface of the vertical main body frame 42 of the main body frame 10 is a strip-shaped portion that is stacked on the outer surface of the vertical main body frame 42 and extends in the extension direction of the vertical main body frame 42.

[0042] The attachment configuration between main body frame 10 and attachment portion 22 of fixed frame 20 is not particularly limited. For example, main body frame 10 may be fixed to fixed frame 20 with fastening members such as screws, with frame outer surface 12 abutting against attachment portion 22 of fixed frame 20.

[0043] The cover portion 23 is a cover plate portion 23a that covers the outdoor side surface 13 of the main body frame 10. By providing the cover plate portion 23a as the cover portion 23, the outdoor side surface 13 of the main body frame 10 can be protected.

[0044] Furthermore, it is preferable that the cover plate portion 23a of the cover portion 23 be continuous with the outdoor side of the mounting plate portion 22a. This makes it easier for the wet sealant 208 filled between the exterior member 202 and the composite sash frame 100 to be interposed only between the exterior member 202 and the fixed frame 20. In other words, the presence of the cover portion 23 prevents the sealant 208, before it hardens, from climbing over the mounting plate portion 22a and adhering to the main frame 10. Therefore, it is not necessary to remove the sealant 208 when replacing the sash. This makes it easier to replace the main frame 10 while leaving the fixed frame 20 in place.

[0045] More specifically, the fixed frame 20 of this embodiment can be a rectangular frame body composed of fixed horizontal frames 51 positioned at the top and bottom in the vertical direction and fixed vertical frames 52 positioned at the left and right in the horizontal direction when viewed from the indoor or outdoor side, for example. The fixed horizontal frames 51 and the fixed vertical frames 52 each have an outdoor flange portion at their outdoor end that protrudes toward the inside of the frame. Furthermore, the fixed horizontal frames 51 and the fixed vertical frames 52 each have an indoor flange portion at their indoor end that protrudes toward the outside of the frame. In this embodiment, the outdoor flange portion is formed by the cover plate portion 23a described above. Furthermore, in this embodiment, the indoor flange portion is formed by the fixed plate portion 21a described above.

[0046] The material of the fixed frame 20 is not particularly limited. Therefore, the fixed frame 20 can be made of a metal such as aluminum, a resin, or a combination of these materials. However, as described above, the fixed frame 20 is fixed to the skeleton of the building 1, and therefore the shape may vary depending on the structure of the building 1. In other words, it is difficult to make the shape of the fixed frame 20 constant regardless of the structure of the building 1. Therefore, it is preferable to make the fixed frame 20 out of aluminum, which is cheaper than resin, so that it can be made into various shapes depending on the structure of the building 1.

[0047] As described above, the composite sash frame 100 of this embodiment comprises a main frame 10 that is attached to a fixed frame 20 that is fixed to the skeleton of the building 1 (in this embodiment, column member 201). This main frame 10 does not have a portion that protrudes outward from the frame outer surface 12. With this configuration, it is possible to replace the main frame 10 while the fixed frame 20 remains fixed to the exterior wall 200 of the building 1, as shown in Figures 1 and 2.

[0048] In other words, the sash can be easily renovated by removing the existing main frame 10 from the fixed frame 20 that is fixed to the building's framework and attaching a new main frame 10 to the fixed frame 20.

[0049] Furthermore, as described above, it is preferable that main body frame 10 has a constant shape regardless of the exterior wall structure of building 1. That is, as shown in Figures 3 to 6, main body frame 10 of composite sash frame 100 of this embodiment is preferably attachable to separate fixing frames 20 (see Figures 1 and 2), 320 (see Figures 3 and 4), and 420 (see Figures 5 and 6) that can be fixed to buildings with different exterior wall structures.

[0050] The exterior wall 300 shown in Figures 3 and 4 has a different configuration from the exterior wall 200 shown in Figures 1 and 2. The exterior wall 300 shown in Figures 3 and 4 includes a pillar member 301, an exterior member 302, a heat insulating member 303, an interior member 304, a window sill 306, and a base member 309. In the exterior wall 300, the base member 309 is arranged on the outdoor side of the pillar member 301, and the heat insulating member 303 is arranged between the outdoor side of this base member 309 and the exterior member 302. The exterior wall structure shown in Figures 3 and 4 is a so-called "exterior insulation structure."

[0051] The main frame 10 of the composite sash frame 101 shown in Figures 3 and 4 is the same as the main frame 10 of the composite sash frame 100 shown in Figures 1 and 2. In contrast, the fixed frame 320 shown in Figures 3 and 4 differs in shape and size from the fixed frame 20 shown in Figures 1 and 2. In other words, the fixed frame 320 shown in Figures 3 and 4 is configured to correspond to the exterior wall structure shown in Figures 3 and 4. Note that the fixed frame 320 shown in Figures 3 and 4 includes an aluminum first frame portion 320a on the outdoor side and a resin second frame portion 320b connected to the indoor side of the first frame portion 320a, but this configuration is not particularly limited. The entire fixed frame 320 may be made of aluminum.

[0052] The exterior wall 400 shown in Figures 5 and 6 has a different configuration from the exterior wall 200 shown in Figures 1 and 2. The exterior wall 400 shown in Figures 5 and 6 is the exterior wall of a building made of reinforced concrete. In other words, the skeleton of the building shown in Figures 5 and 6 is the exterior wall 400 itself made of reinforced concrete, and the exterior wall structure is a "reinforced concrete structure."

[0053] The main frame 10 of the composite sash frame 102 shown in Figures 5 and 6 is the same as the main frame 10 shown in Figures 1 and 2. In contrast, the fixed frame 420 shown in Figures 5 and 6 differs in shape and size from the fixed frame 20 shown in Figures 1 and 2. In other words, the fixed frame 420 shown in Figures 5 and 6 is configured in accordance with the exterior wall structure shown in Figures 5 and 6.

[0054] As described above, by making the main frame 10 constant regardless of the exterior wall structure, the sash replacement work becomes easier regardless of the exterior wall structure, and the sash replacement work can be made more efficient.

[0055] In other words, according to the main frame 10 of this embodiment, the existing main frame 10 can be removed from the fixed frame 20 (see Figures 1 and 2), 320 (see Figures 3 and 4), and 420 (see Figures 5 and 6) that are fixed to the building's main body, and a new main frame 10 can be attached to the fixed frame 20 (see Figures 1 and 2), 320 (see Figures 3 and 4), and 420 (see Figures 5 and 6), thereby easily renovating the sash regardless of the exterior wall structure.

[0056] The composite sash frame, main frame, and sash renovation method of the present invention are not limited to the specific configurations and processes shown in the above-mentioned embodiments, and various modifications and variations are possible as long as they do not deviate from the scope of the claims. [Industrial Applicability]

[0057] The present invention relates to a composite sash frame, a main frame, and a sash renovation method. [Explanation of symbols]

[0058] 1: Building 10: Main frame 10a: opening 11:Inside of the frame 12: Outer surface of frame 13: Outdoor frame side 14: Indoor frame side 20, 320, 420: Fixed frame 21: Fixed part 21a: Fixed plate-shaped part 22: Mounting part 22a: Mounting plate part 23: Cover part 23a: Cover plate part 30: Panel material 30a: Outer shoji screen (panel material) 30b: Inner shoji screen (panel material) 30a1, 30b1: Stile 30a2, 30b2: glass plate material 41: Main body horizontal frame 42: Main body vertical frame 51: Fixed horizontal frame 52: Fixed vertical frame 100, 101, 102: Composite sash frame 200, 300, 400: Exterior walls 200a: opening 201, 301: Column members 202, 302: Exterior materials 203, 303: Heat insulating materials 204, 304: Interior materials 205: Fusumi 206, 306: Window sill 207: Fastening member 208: Sealant 309: Base material 320a: First frame part 320b: 2nd frame part

Claims

1. a main frame having an inner frame surface defining an opening in which a panel material can be placed; a fixed frame that can be attached to the main body frame and is fixed to the building frame; The main body frame does not have a portion that protrudes outward from the outer surface of the frame, The main body frame does not include a portion that is fixed to the skeleton of the building, The fixed frame is a fixing portion fixed to the skeleton of the building; an attachment portion attached to the main body frame in a state in which the fixing portion protrudes from the frame outer surface of the main body frame in the out-of-plane direction, The fixed frame and the main body frame are configured separately from each other, The fixed frame does not have a portion that covers the main frame from the indoor side.

2. The composite sash frame according to claim 1 , wherein the fixing portion is a fixing plate-shaped portion disposed between an exterior member and an interior member of the exterior wall of the building.

3. The composite sash frame according to claim 1 or 2, wherein the mounting portion is a mounting plate-shaped portion that is attached to the main frame in a state where it is stacked on the outer frame surface of the main frame.

4. The composite sash frame according to claim 1 , wherein the main frame is made of resin.

5. 5. A composite sash frame as claimed in any one of claims 1 to 4, wherein the fixed frame is made of aluminium.

6. The composite sash frame according to claim 1 , wherein the fixed frame includes a cover portion that covers the exterior side surface of the main frame.

7. A main frame having a frame inner surface that defines an opening in which a panel material can be placed, It can be attached to a fixed frame that is fixed to the building frame, It does not have any part that protrudes outward from the outer surface of the frame, It does not have a part that is fixed to the skeleton of the building, The fixed frame is a fixing portion fixed to the skeleton of the building; an attachment portion attached to the main body frame in a state in which the fixing portion protrudes from the frame outer surface of the main body frame in the out-of-plane direction, The fixed frame and the main body frame are configured separately from each other, A main frame in which the fixed frame does not have a portion that covers the main frame from the indoor side.

8. A sash repair method for replacing a main frame having a frame inner surface that defines an opening in which a panel material can be placed, comprising: The main body frame does not have a portion that protrudes outward from the outer surface of the frame, The main frame does not have a part that is fixed to the skeleton of the building, The sash repair method includes: removing the existing main body frame from a fixed frame fixed to the skeleton of the building; attaching the new main body frame to the fixed frame; Including, The fixed frame is a fixing portion fixed to the skeleton of the building; an attachment portion attached to the main body frame in a state in which the fixing portion protrudes from the frame outer surface of the main body frame in the out-of-plane direction, The fixed frame and the main body frame are configured separately from each other, A sash renovation method in which the fixed frame does not have a portion that covers the main frame from the indoor side.

Images