Building materials

Abstract

To provide fittings with higher thermal insulation properties. [Solution] The system comprises a double-glazed glass 5 having multiple glass panes 5A, 5B, and 5C, and a frame 6 that holds the double-glazed glass 5, and the outermost glass pane 5A, which is located furthest outdoors, has an extension portion 5G that extends outward in the in-plane direction of the double-glazed glass 5 further than the indoor-side glass panes 5B and 5C other than the outermost glass pane 5A, and the extension portion 5G is located outdoors from the frame 6 and faces the frame 6 in the forward direction.

Description

[Technical Field]

[0001] The present invention relates to fittings with double glazing. [Background technology]

[0002] Conventionally, there has been known a fixture in which the edges of double-glazed glass are held in an aluminum frame-shaped frame having an upper frame, a lower frame, a door edge frame, and a door joint frame (see, for example, Patent Document 1). In this fixture, each frame has a glass holding groove that holds the edges of the double-glazed glass, and the edges of the double-glazed glass are held via a glazing channel attached to the opening of the glass holding groove. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-23448 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional building fixtures, the portion of each frame that forms the glass-retaining groove has opposing portions on the outdoor and indoor sides that face the edge of the double-glazed glass in the projection direction, and the indoor and outdoor opposing portions are connected on the outer periphery side of the edge of the double-glazed glass. In other words, the opposing portion of the frame that is located on the outdoor side of the double-glazed glass and covers the double-glazed glass is connected to the opposing portion on the indoor side. Therefore, even if double-glazed glass with an air gap and low heat transmittance is used, there is a problem in that the insulating properties are impaired because the frame, which is made of a metal such as aluminum that has a higher thermal conductivity than glass, is connected to the indoor and outdoor sides.

[0005] The present invention has been made in consideration of the above-mentioned problems of the conventional art, and an object of the present invention is to provide a building material with higher thermal insulation properties. [Means for solving the problem]

[0006] The main invention for achieving this object is a fixture comprising a double-glazed glass having a plurality of glass plates and a frame body that holds the double-glazed glass, wherein the outermost glass plate of the plurality of glass plates that is located furthest outdoors has an extension portion that extends outward in the in-plane direction of the double-glazed glass further than the indoor-side glass plates other than the outermost glass plate, and the extension portion is located outdoors from the frame body and faces the frame body in the forward direction. Other features of the present invention will become apparent from the description of this specification and the accompanying drawings. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a building material with higher thermal insulation properties. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a view of the fitting of this embodiment as seen from the outdoor side. [Figure 2] FIG. 2 is a vertical cross-sectional view showing the fitting of the present embodiment. [Figure 3] FIG. 2 is a cross-sectional view showing the fitting of the present embodiment. [Figure 4] FIG. 3 is an enlarged view of part A in FIG. 2. [Figure 5] FIG. 3 is an enlarged view of part B in FIG. [Figure 6] FIG. 4 is an enlarged view of part C in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the fitting of the present invention will be described with reference to the drawings. In this embodiment, a fitting 1 for a vertical sliding window will be described as an example of a fitting according to the present invention.

[0010] In the following explanation, when the fitting 1 is attached to a building or the like, the direction that is up and down will be referred to as the up-down direction, the direction that is left and right will be referred to as the left-right direction, and the depth direction that is the direction between indoors and outdoors will be referred to as the prospective direction.

[0011] As shown in Fig. 1, the fitting 1 of this embodiment comprises a window frame 2 that is framed in a rectangular shape and forms an opening, a movable shoji screen 3 attached within the window frame 2, and a link mechanism (not shown) provided between the window frame 2 and the movable shoji screen 3. The movable shoji screen 3 is supported on a pivot shaft that is rotatable while moving vertically and laterally (left and right), and is configured to be able to be opened by pushing a handle 4 (Fig. 3) provided on the movable shoji screen 3 outwards.

[0012] The window frame 2 is formed into a rectangular frame by an upper frame 21, a lower frame 22, and vertical frames 23 arranged on the left and right. As shown in Figures 2 and 3, the upper frame 21, the lower frame 22, and the left and right vertical frames 23 are all connected by frame connectors 21C, 22C, and 23C to outdoor frame members 21A, 22A, and 23A located on the outdoor side and indoor frame members 21B, 22B, and 23B located on the indoor side. The outdoor frame members 21A, 22A, and 23A and the indoor frame members 21B, 22B, and 23B are extruded aluminum members, and the frame connectors 21C, 22C, and 23C are made of synthetic resin.

[0013] The movable shoji screen 3 has a double-glazed glass 5 having three glass panes 5A, 5B, and 5C, and a frame 6 that holds the double-glazed glass 5. The three glass panes 5A, 5B, and 5C of the double-glazed glass 5 face each other at a distance in the projection direction, and the outer edges of each glass pane 5A, 5B, and 5C are joined via a spacer 5D that has sealing properties. In the following description of the movable shoji screen 3, the outside of the frame 6 is referred to as the outer periphery side, and the inside of the frame 6 is referred to as the inner periphery side in the in-plane direction of the double-glazed glass 5 or the three glass panes 5A, 5B, and 5C.

[0014] Of the three glass plates 5A, 5B, and 5C, the outermost glass plate 5A, which is arranged furthest outdoors, has an outer peripheral edge 5E located outermost in the in-plane direction of the outermost glass plate 5A (double glazing 5) than the outer peripheral edges 5F of the indoor-side glass plates 5B and 5C, which are arranged indoors relative to the outermost glass plate 5A. In other words, the outermost glass plate 5A has extending portions 5G on all four sides that extend outer circumferentially further than the outer peripheral edges 5F of the indoor-side glass plates 5B and 5C.

[0015] In this embodiment, an example is described in which the double-glazing unit 5 has two indoor-side glass sheets 5B and 5C, but the number of indoor-side glass sheets is not limited to two. For example, if the double-glazing unit 5 is made up of two glass sheets, there is one indoor-side glass sheet, and if the double-glazing unit 5 is made up of four or more glass sheets, there are three or more indoor-side glass sheets. In other words, the indoor-side glass sheet is any glass sheet excluding the outermost glass sheet among the glass sheets that make up the double-glazing unit.

[0016] The frame body 6 is made up of an upper frame 7, a lower frame 8, and vertical frames 9 arranged on the left and right sides, arranged in a rectangular shape, and the left and right vertical frames 9 are fixed together by screws that extend left and right and thread into the upper frame 7 or the lower frame 8. As shown in Figures 4 to 6, the upper frame 7, the lower frame 8, and the left and right vertical frames 9 are all connected by frame connectors 72, 82, 92 to outer frame members 70, 80, 90 located on the outer periphery and inner frame members 71, 81, 91 located on the inner periphery. The outer frame members 70, 80, 90 and the inner frame members 71, 81, 91 are extruded aluminum members with the longitudinal direction as the extrusion direction, and the frame connectors 72, 82, 92 are made of synthetic resin.

[0017] The outer frame members 70, 80, 90 have rectangular cylindrical portions 70B, 80B, 90B that penetrate longitudinally and form hollow portions 70A, 80A, 90A with rectangular cross sections, and outer wall portions 70C, 80C, 90C that are connected to the rectangular cylindrical portions 70B, 80B, 90B and extend toward the indoor side.

[0018] The rectangular cylindrical portions 70B, 80B, 90B have a cross-sectional shape that is rectangular and long in the projection direction, and in the rectangular cylindrical portions 70B, 80B, 90B, outer peripheral wall portions 70C, 80C, 90C are provided that are connected to the inner peripheral edges of the indoor visible wall portions 70D, 80D, 90D that form the indoor visible surface.

[0019] As shown in Fig. 4, the upper frame 7 has a protruding portion 70E in which an indoor visible wall portion 70D protrudes toward the inner periphery (downward), and the outer periphery wall portion 70C extends toward the indoor side from the inner periphery end of the protruding portion 70E. On the inner periphery of the outer periphery wall portion 70C, inner frame members 71 are arranged at intervals in the in-plane direction (vertical direction) of the double-glazed glass 5, and the outdoor ends and indoor ends of the outer periphery wall portion 70C and the inner frame members 71 are connected by frame connecting members 72, respectively.

[0020] Protrusion 70E connected to the outdoor end of outer peripheral wall 70C, outdoor stile connecting member 72, and the outdoor end of inner peripheral stile member 71 form a flat sight surface 7A. Square tubular portion 70B is located on the outer periphery of outer peripheral wall 70C, and the portion of indoor sight wall 70D that is outdoor is located on the outdoor side of sight surface 7A.

[0021] As shown in Figure 5, the lower frame 8 faces the square cylindrical portion 70B of the upper frame 7 at the square cylindrical portion 80B, and an outer peripheral wall portion 80C is provided at a position where the inner wall portion 80F facing the center of the frame body 6 extends indoors beyond the indoor visible wall portion 80D. On the inner side of the outer peripheral wall portion 80C, inner frame members 81 are arranged at intervals in the in-plane direction (vertical direction) of the double-glazed glass 5, and the outdoor-side ends and indoor-side ends of the outer peripheral wall portion 80C and the inner frame member 81 are connected by frame connecting members 82, respectively.

[0022] The outdoor end of outer peripheral wall portion 80C, outdoor stile connecting member 82, and outdoor end of inner peripheral stile member 81 form a flat sight surface 8A. Square tubular portion 80B is located on the outer periphery side of sight surface 8A, and the portion on the outdoor side of indoor sight wall portion 80D is located outdoors from sight surface 8A.

[0023] As shown in Fig. 6, the vertical frame 9 has an indoor visible wall portion 90D that has a protruding portion 90E that protrudes slightly toward the inner periphery (left or right), and the outer periphery wall portion 90C extends toward the indoor side from the inner periphery end of the protruding portion 90E. On the inner periphery of the outer periphery wall portion 90C, inner periphery frame members 91 are arranged at intervals in the in-plane direction (left-right direction) of the double-glazed glass 5, and the outdoor-side ends and indoor-side ends of the outer periphery wall portion 90C and the inner periphery frame members 91 are connected by frame connecting members 92, respectively.

[0024] The protruding portion 90E, which forms the outdoor end of the outer peripheral wall portion 90C, the outdoor stile connecting member 92, and the outdoor end of the inner peripheral stile member 91 form a flat sight surface 9A. The square tubular portion 90B is located on the outer periphery side of the outer peripheral wall portion 90C, and the portion of the square tubular portion 90B that is on the outdoor side of the indoor sight wall portion 90D is located on the outdoor side of the sight surface 9A.

[0025] The double glazing 5 is installed such that the indoor-side glass sheets 5B, 5C are arranged in a space surrounded by the rectangular tubular portions 70B, 80B, 90B. Specifically, the outer peripheral edges 5F of the indoor-side glass sheets 5B, 5C face, with a gap in the in-plane direction, the inner peripheral wall portions 70F, 80F, 90F that face the center of the frame 6 in each of the rectangular tubular portions 70B, 80B, 90B, and the outer peripheral portion of the indoor-side surface of the indoor-most glass sheet 5C faces, with a gap in the prospective direction, the respective sight surfaces 7A, 8A, 9A.

[0026] The double-glazed glass 5 is placed on the rectangular cylindrical portion 80B of the bottom frame 8 via a setting block 3A. The glass pane 5C closest to the interior has backup material 3B interposed between it and each of the facing surfaces 7A, 8A, and 9A, and is bonded with a waterproof coating material, known as sealing 3C, which becomes rubbery and repels water when applied.

[0027] The outermost glass sheet 5A of the double-glazing glass 5 has an extension 5G that faces, at a distance in the projection direction, the exterior facing wall sections 70G, 80G, and 90G that form the exterior facing surfaces of each of the rectangular tubular sections 70B, 80B, and 90B. The outermost glass sheet 5A is fixed in place by a so-called structural sealant 3D, which is interposed between the extension 5G and the exterior facing wall sections 70G, 80G, and 90G and structurally bonds and fixes the components together, using a backup material 3B.

[0028] In the movable shoji screen 3 in which the double-glazed glass 5 is attached to the frame 6, the upper frame 7, lower frame 8 and left and right vertical frames 9 do not protrude outward from the outermost glass plate 5A, and the outdoor visible wall portions 70G, 80G, 90G that form the outdoor ends of the upper frame 7, lower frame 8 and left and right vertical frames 9 are located inside the outermost glass plate 5A and face the extension portion 5G in the forward direction.

[0029] According to the fitting 1 of this embodiment, the extension portion 5G of the outermost glass sheet 5A of the double-glazing glass 5, which extends outward in the in-plane direction of the double-glazing glass 5 beyond the indoor-side glass sheets 5B and 5C, is located on the outdoor side of the rectangular tubular portions 70B, 80B, and 90B that form the outdoor-side ends of the frame 6 and faces the forward direction, so the rectangular tubular portions 70B, 80B, and 90B are not exposed to the outdoors. This makes the frame 6 less susceptible to heating or cooling by outside air and reduces heat conduction through the frame 6 to the indoor side. This makes it possible to provide a fitting 1 with higher thermal insulation. In particular, the frame 6 of this embodiment has peripheral frame members 70, 80, and 90 to which the double-glazing glass 5 is joined, made of aluminum, which has a higher thermal conductivity than glass, so heat conduction through the frame 6 to the indoor side can be more effectively reduced.

[0030] Furthermore, the extension 5G is joined to the frame 6 by the structural sealant 3D, so that the extension 5G is structurally adhesively fixed to the frame 6. This makes it possible to more reliably hold the double-glazing glass 5 to the frame 6.

[0031] Furthermore, since the frame 6 does not protrude beyond the outer peripheral edge 5E of the outermost glass plate 5A in the in-plane direction, the frame 6 is less likely to come into contact with the outside air. This makes it possible to further improve thermal insulation. Furthermore, the frame 6 is not visible from the outside. In other words, when viewed from the outside, only the outermost glass plate 5A of the movable shoji screen 3 is visible, and the outer peripheral edge of the frame 6 is not visible. This results in excellent design.

[0032] Furthermore, since the double glazing 5 is made up of three glass plates 5A, 5B, and 5C, it is possible to provide higher heat insulation than when it is made up of two glass plates.

[0033] Furthermore, because the rectangular tubular portions 70B, 80B, and 90B of the frame 6 are arranged on the outer periphery of the indoor-side glass panes 5B and 5C in the in-plane direction, the indoor-side glass panes 5B and 5C can be supported by the frame 6 on the underside of the double-glazing 5. This makes it possible to provide a fitting 1 that more reliably holds the double-glazing 5 and has excellent thermal insulation properties.

[0034] Furthermore, since the frame 6 and the indoor glass panel 5C are joined by the sealing 3C, it is possible to ensure airtightness and watertightness between the frame 6 and the double glazing 5.

[0035] In the above embodiment, an example has been described in which the frame 6 and the indoor-side glass plate 5C are joined by the sealant 3C, but the frame 6 and the indoor-side glass plate 5C may also be joined by the structural sealant 3D. In this case, the frame 6 and the indoor-side glass plate 5C are also structurally bonded and fixed together, making it possible to more reliably hold the insulating glass 5 to the frame 6.

[0036] Furthermore, by attaching a heat ray reflective film to any of the glass plates 5A, 5B, and 5C that make up the double glazing 5, it is possible to prevent heat rays from entering the room and also to prevent the temperature rise in the space between the glass plates 5A, 5B, and 5C, thereby reducing the heat transmittance and further improving the insulation properties.

[0037] Furthermore, by applying a heat ray reflective film to the glass plates 5A, 5B, and 5C, the visible light transmittance is reduced, making it difficult to see the indoor side of the glass plates to which the heat ray reflective film is applied. For example, when a heat ray reflective film is applied to the outermost glass plate 5A, the spacers interposed between the glass plates 5A, 5B, and 5C, as well as the sealant and backup material that join the indoor side glass plate 5C to the frame 6, are difficult to see through the outermost glass plate 5A, thereby further improving the design.

[0038] Furthermore, applying a heat ray reflective film to the glass plates 5A, 5B, and 5C reduces ultraviolet transmittance. Therefore, for example, applying a heat ray reflective film to the outermost glass plate 5A improves the durability of sealing materials such as the structural sealant 3D and the sealing material 3C that joins the indoor glass plate 5C to the frame 6.

[0039] In the above embodiment, an example has been described in which the frame 6 is formed of aluminum outer frame members 70, 80, 90 and inner frame members 71, 81, 91 and synthetic resin frame connectors 72, 82, 92, but this is not limiting. For example, the outer frame members and inner frame members may be made of a metal other than aluminum, or one of the outer frame members or inner frame members may be made of synthetic resin without a frame connector.

[0040] In addition, the frame may be made of metal, synthetic resin, or wood, and may not have a frame connector and may consist of an upper frame, a lower frame, and a vertical frame that are not separated into an outer frame and an inner frame.The frame that holds the double-glazed glass is not limited to a frame, and may be, for example, a frame that constitutes a fixed window and is fixed directly to a building, etc.

[0041] Furthermore, when the movable shoji screen 3 of the fixture 1 of the present invention is fixed to the window frame 2 so as to be immovable and used as a fixture for a fixed window, a large clearance can be secured between the shoji screen and the window frame, so that even if the window frame is significantly deformed by an earthquake or the like, damage to the fixture and the double-pane glass can be suppressed.

[0042] In the above embodiment, the fitting 1 for a vertical sliding window has been described as an example, but the fitting is not limited to this. For example, any fitting having a frame that holds double glazing, such as a sliding window, an outward-opening window, an inward-opening window, or a fixed window, may be used.

[0043] The above-described embodiments are provided to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and the present invention includes equivalents thereof.

[0044] This embodiment discloses the fittings described in the following items (1) to (9).

[0045] (1) A fixture comprising a double-glazed glass having a plurality of glass panes and a frame body that holds the double-glazed glass, wherein the outermost glass pane of the plurality of glass panes that is located furthest outdoors has an extension portion that extends outward in the in-plane direction of the double-glazed glass more than the indoor-side glass panes other than the outermost glass pane, and the extension portion is located outdoors from the frame body and faces the frame body in the forward direction.

[0046] In the fitting described in (1), the extension portion of the outermost glass sheet of the double-glazing glass, which extends further outward in the in-plane direction of the double-glazing glass than the indoor-side glass sheet, is located on the outdoor side of the frame body and faces the frame body in the projection direction, so the part of the frame body facing the extension portion is not exposed to the outdoors beyond the outermost glass sheet. This makes the temperature of the frame body less susceptible to the outside temperature and makes it possible to suppress heat conduction to the indoor side through the frame body. This makes it possible to provide fittings with higher thermal insulation properties.

[0047] (2) In the fitting described in (1), the extension portion is joined to the frame body by a structural sealant.

[0048] In the fitting described in (2), the extension is joined to the frame with a structural sealant, so that the extension is structurally bonded to the frame, which makes it possible to more reliably hold the double-glazed glass in the frame.

[0049] (3) The fixture described in (1) or (2), characterized in that the frame is made of metal.

[0050] In the building fixture described in (3), the frame is made of metal, which has a higher thermal conductivity than glass, so it is possible to more effectively suppress the conduction of heat to the indoor side through the frame while maintaining the strength of the frame.

[0051] (4) A fitting according to any one of (1) to (3), characterized in that the frame does not protrude beyond the outer peripheral edge of the outermost glass plate in the in-plane direction.

[0052] In the fitting described in (4), the frame does not protrude beyond the outer edge of the outermost glass sheet in the in-plane direction of the double-glazed glass, so the frame is less likely to come into contact with the outside air. This makes it possible to further improve insulation. In addition, since the frame is not visible from the outside, it has excellent design properties.

[0053] (5) The fitting according to any one of (1) to (4), characterized in that the double glazing is composed of three of the glass plates.

[0054] In the fixture described in (5), the double-glazed glass is made up of three glass panes, which allows it to have higher thermal insulation properties than if it were made up of two glass panes.

[0055] (6) The fitting according to any one of (1) to (5), characterized in that the frame body is disposed on the outer periphery of the indoor glass sheet in the in-plane direction.

[0056] In the fitting described in (6), a frame is arranged on the outer periphery of the indoor glass sheet in the in-plane direction, so that the indoor glass sheet is supported by the frame on the underside of the double-glazing, which makes it possible to more reliably support the double-glazing.

[0057] (7) A fitting according to any one of (1) to (6), characterized in that the indoor glass panel and the frame are joined by sealing.

[0058] In the fittings described in (7), it is possible to ensure airtightness and watertightness between the indoor glass panel and the frame body, which are joined by sealing.

[0059] (8) A fitting according to any one of (1) to (6), characterized in that the indoor glass panel is joined to the frame by a structural sealant.

[0060] In the fitting described in (8), the indoor glass pane is bonded to the frame with a structural sealant, so that the indoor glass pane is structurally bonded to the frame, which makes it possible to hold the double-glazed glass in the frame more securely.

[0061] (9) A fitting according to any one of (1) to (8), characterized in that a heat-reflecting film is attached to any one of the glass plates among the plurality of glass plates.

[0062] In the fitting described in (9), a heat-reflecting film is attached to one of the glass panes among multiple panes, which prevents heat rays from entering the room and reduces the thermal transmittance, thereby further improving thermal insulation. Also, the visible light transmittance is reduced, making it difficult to see the indoor side of the glass pane to which the heat-reflecting film is attached. Therefore, sealing materials, back-up materials, frames, etc. located on the indoor side of the glass pane are difficult to see, further improving the design. [Explanation of symbols]

[0063] 1: Doors and windows, 2: Window frames, 3: Movable shoji screens, 3A: Setting blocks, 3B: Backup material, 3C: Sealing, 3D: Structural sealant, 4: Handle, 5: Double glazing, 5A: Outermost glass plate, 5B: Indoor glass plate, 5C: indoor glass plate, 5D: spacer, 5E: outer peripheral edge of outermost glass plate, 5F: outer peripheral edge of indoor glass sheet, 5G: extension part, 6: frame, 7: upper frame, 7A: Upper frame surface, 8: Lower frame, 8A: Lower frame surface, 9: Vertical frame, 9A: Vertical frame surface, 21: Upper frame, 21A: Outdoor frame material of upper frame, 21B: Indoor frame material of upper frame, 21C: Frame connecting material of upper frame, 22: Lower frame, 22A: Lower frame outdoor frame material, 22B: Lower frame indoor frame material, 22C: Lower frame frame connecting material, 23: Vertical frame, 23A: Vertical outdoor frame material, 23B: Vertical indoor frame material 23C: Vertical frame connecting member, 70: Peripheral frame member of upper frame, 70A: Hollow portion of upper frame, 70B: Square cylindrical portion of the upper frame, 70C: Outer wall portion of the upper frame, 70D: Indoor facing wall portion of the upper frame, 70E: protruding portion of upper frame, 70F: inner peripheral wall portion of upper frame, 70G: outdoor facing wall portion of upper frame, 71: inner frame material of upper frame, 72: frame connecting material of upper frame, 80: outer frame material of lower frame, 80A: hollow portion of the lower frame, 80B: square cylindrical portion of the lower frame, 80C: outer peripheral wall portion of the lower frame, 80D: Indoor facing wall portion of the lower frame, 80F: Inner peripheral wall portion of the lower frame, 80G: Outdoor facing wall part of the lower frame, 81: Inner frame material of the lower frame, 82: Frame connecting material of the lower frame, 90: Peripheral frame material of vertical frame, 90A: Hollow portion of vertical frame, 90B: Square cylindrical portion of vertical frame, 90C: Peripheral wall portion of vertical frame, 90D: Indoor facing wall portion of vertical frame, 90E: Protrusion portion of vertical frame, 90G: Outdoor facing wall of vertical frame, 91: Inner frame material of vertical frame, 92: Frame connecting material of vertical frame,

Claims

1. a double-glazed glass sheet having a plurality of glass sheets; a frame body that holds the double-glazing glass; and an outermost glass plate located furthest outdoors among the plurality of glass plates has an extension portion that extends outward in an in-plane direction of the double glazing glass relative to an indoor-side glass plate other than the outermost glass plate, The extension portion is located outside the frame body and faces the frame body in the forward direction.

2. In the fittings according to claim 1, A fixture characterized in that the extension portion is joined to the frame body by a structural sealant.

3. In the fittings according to claim 1 or 2, The frame is made of metal.

4. In the fittings according to claim 1 or 2, The frame does not protrude outward from the outer peripheral edge of the outermost glass plate in the in-plane direction.

5. In the fittings according to claim 1 or 2, The double glazing is constructed from three of the glass sheets.

6. In the fittings according to claim 1 or 2, A fitting characterized in that the frame body is arranged on the outer periphery of the indoor-side glass sheet in the in-plane direction.

7. In the fittings according to claim 1 or 2, The interior glass panel and the frame are joined by sealing.

8. In the fittings according to claim 1 or 2, A fixture characterized in that the indoor glass panel is joined to the frame body with a structural sealant.

9. In the fittings according to claim 1 or 2, A fitting characterized in that a heat ray reflective film is attached to any one of the plurality of glass plates.

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