Doors and windows

Abstract

To provide a joinery component that can reduce component costs while suppressing deformation of the frame material. [Solution] The joinery comprises a frame material having an opening groove, a surface material whose lower edge is supported within the opening groove, and a sagging prevention component provided within the opening groove. The frame material has a horizontal wall forming the bottom surface of the opening groove and a vertical wall forming a visible surface on the outer periphery of the horizontal wall. The sagging prevention component has a receiving surface positioned opposite the lower end surface of the surface material and an installation surface installed on the bottom surface of the opening groove. The center of the depth width of the installation surface is either positioned to overlap the vertical wall vertically in the depth direction or to be located on the interior side of the vertical wall.

Description

Technical Field

[0001] The present invention relates to a fixture including a frame member and a face member.

Background Art

[0002] For windows of a building, a fixture in which a face member such as glass is supported by a frame member is used. For example, Patent Document 1 discloses a configuration in which a downward prevention component for preventing the glass from sagging during a fire is installed in an opening groove of a lower frame.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The downward prevention component of Patent Document 1 is installed such that the installation surface with respect to the bottom surface of the opening groove projects outside the vertical wall on the outer peripheral side of the opening groove and outside the room. Therefore, when the glass sags during a fire and the downward prevention component receives a large load, there is a possibility of deforming the lower frame. Thus, in this configuration, a collapse prevention component is arranged on the outside of the vertical wall on the outside of the room to suppress the deformation of the lower frame by the downward prevention component that has received the load of the glass. That is, in this configuration, a collapse prevention component is separately required, increasing the component cost.

[0005] The present invention has been made in consideration of the above problems of the prior art, and an object thereof is to provide a fixture that can reduce the component cost while suppressing the deformation of the frame member.

Means for Solving the Problems

[0006] A joinery according to one aspect of the present invention comprises a frame material having an opening groove, a facing material whose lower edge is supported within the opening groove, and a sagging prevention component provided within the opening groove, wherein the frame material has a horizontal wall forming the bottom surface of the opening groove and a vertical wall forming a visible surface on the outer periphery of the horizontal wall, and the sagging prevention component has a receiving surface positioned opposite to the lower end surface of the facing material and an installation surface installed on the bottom surface of the opening groove, wherein the center of the depth width of the installation surface is located either in a position that overlaps the vertical wall vertically in the depth direction or in a position on the interior side of the vertical wall. [Effects of the Invention]

[0007] According to the above embodiment of the present invention, it is possible to reduce component costs while suppressing deformation of the frame material. [Brief explanation of the drawing]

[0008] [Figure 1] This is a longitudinal cross-sectional view of a door or window according to one embodiment. [Figure 2] Figure 1 is a cross-sectional view of the joinery shown. [Figure 3] Figure 1 is an enlarged view of the lower frame and its surrounding area. [Figure 4] (A) is a plan view of the lower frame showing an example where the anti-sagging component is positioned to overlap with the drain hole, and (B) is a plan view of the lower frame showing an example where the anti-sagging component is positioned not to overlap with the drain hole. [Figure 5] This is a cross-sectional view of an example configuration in which a sagging prevention component is screwed to the lower frame. [Figure 6] This is a side view of a modified version of the anti-sagging component. [Figure 7] This is a side view of a lowering prevention component relating to another modified example. [Modes for carrying out the invention]

[0009] The following describes preferred embodiments of the building components according to the present invention in detail with reference to the attached drawings.

[0010] As shown in Figures 1 and 2, the joinery 10 according to this embodiment comprises a frame 12 fixed to an opening in the building structure and a facing material 14 supported inside the frame 12. In this embodiment, a fixed window joinery 10 is provided as an example, in which the facing material 14 is supported by the frame 12 in a way that prevents opening and closing. The joinery 10 is installed on the exterior wall of a building such as a house or a shop, and separates the interior and exterior sides of the building.

[0011] First, let me explain the overall structure of the joinery 10.

[0012] The frame 12 is constructed by framing the upper frame 12a, the lower frame 12b, and the left and right vertical frames 12c and 12d around the perimeter, thereby forming a rectangular opening on the inside.

[0013] In this application, the "depth direction" refers to the direction of the door 10 from the inside to the outside, that is, the direction from the inside to the outside or the reverse direction (indicated by arrow Z in the figure), and the "depth surface" refers to the surface that extends along the depth direction. The "face direction" is the direction perpendicular to the depth direction, and in the case of a vertical frame 12c that is long in the vertical direction, it refers to the left-right direction perpendicular to its longitudinal direction (indicated by arrow X in the figure), and in the case of a lower frame 12b that is long in the left-right direction, it refers to the up-down direction perpendicular to its longitudinal direction (indicated by arrow Y in the figure). The "face surface" refers to the surface that aligns with the face direction. The "inner circumference side" refers to the inner part of the frame body 12, which is a frame-shaped member. The "outer circumference side" refers to the outer part of the frame body 12, which is a frame-shaped member.

[0014] As shown in Figure 1, the upper frame 12a is configured by connecting an attachment material 17 to the indoor side of the upper frame body 16. The attachment material 17 is connected to the upper frame body 16 by, for example, a pair of engaging parts and covers its indoor surface. The lower frame 12b is configured by connecting an attachment material 21 to the indoor side of the lower frame body 20. The attachment material 21 is connected to the lower frame body 20 by, for example, a pair of engaging parts and covers its indoor surface.

[0015] As shown in Fig. 2, one vertical frame 12c is configured by connecting an attachment member 25 and a pressing edge 26 to the indoor side of the vertical frame body 24. The attachment member 25 is connected to the vertical frame body 24 by, for example, a pair of engaging portions and covers the indoor side surface thereof. The pressing edge 26 has a first portion 26a on the outdoor side engaged with the prospective surface on the inner peripheral side of the vertical frame body 24, and a second portion 26b on the indoor side engaged with the first portion 26a and the attachment member 25. The other vertical frame 12d can have a structure symmetric to the left and right with the one vertical frame 12c. Therefore, for each component of the vertical frame 12d, the same reference numerals as those of the components of the vertical frame 12c are given and detailed description thereof is omitted.

[0016] The frame bodies 16, 20, 24 and the first portion 26a are, for example, extruded profiles made of a metal material such as an aluminum alloy. The attachment members 17, 21, 25 and the second portion 26b are, for example, extruded profiles made of a resin material such as vinyl chloride resin (PVC). Thereby, the frame 12 constitutes a window frame with a composite structure by combining a metal material and a resin material, and has high durability and heat insulation performance. Each of the frames 12a to 12d may be entirely composed of metal or resin.

[0017] As shown in Figs. 1 and 2, the facing material 14 is, for example, a two-layer laminated glass in which a pair of plate glasses 28, 29 face each other with a spacer 30 interposed therebetween. The facing material 14 may be a single layer or may have a structure of three or more layers. In the case of this embodiment, the plate glass 28 on the outdoor side is a fireproof glass, for example, wired glass or heat-resistant toughened glass. The plate glass 29 on the indoor side is a non-fireproof glass, for example, float glass.

[0018] The four peripheral edge portions of the facing material 14 are inserted into and supported by the opening grooves 32 provided in each of the frames 12a to 12d. The opening grooves 32 open toward the inner peripheral side of the frame 12 and can swallow the edge portions of the facing material 14. The edge portions of the facing material 14 are supported in the opening grooves 32 via, for example, a backup material 33 and a sealing material 34.

[0019] As shown in FIG. 1, a fall-preventing component 36 is installed in the opening groove 32 of the lower frame 12b. The fall-preventing component 36 is a component that suppresses the occurrence of a through-hole in the indoor-outdoor direction between the facing material 14 and the frame body 12 when the facing material 14 hangs down due to its weight during a fire. The reference numeral 38 in FIG. 1 is a setting block that supports the lower end surface 14a of the facing material 14. The setting block 38 is, for example, a rubber block formed of EPDM (ethylene propylene diene rubber), and is arranged at a plurality of positions in the longitudinal direction of the lower frame 12b (see FIG. 4(A)).

[0020] Next, the configuration of the fall-preventing component 36 and its peripheral part will be described.

[0021] First, a specific configuration example of the lower frame 12b where the fall-preventing component 36 is installed will be described. As shown in FIG. 3, the lower frame 12b has a horizontal wall 40, side walls 41, 42, and a vertical wall 43 around the opening groove 32.

[0022] The horizontal wall (bottom wall) 40 is a plate portion that forms the bottom surface 32a of the opening groove 32. The horizontal wall 40 extends along the indoor-outdoor direction on the outer peripheral side of the opening groove 32. Drainage holes 44, 45 arranged in the indoor-outdoor direction are formed in the horizontal wall 40. The outdoor drainage hole 44 opens on the outdoor side of the vertical wall 43 and communicates with the space S. The indoor drainage hole 45 opens on the indoor side of the vertical wall 43 and communicates with the hollow portion 48. A set of drainage holes 44, 45 arranged so as to straddle the vertical wall 43 indoors and outdoors can be provided, for example, near both ends in the longitudinal direction of the lower frame 12b (see FIG. 4(A)). For example, only the outdoor drainage hole 44 can be provided near the center in the longitudinal direction of the lower frame 12b. The indoor drainage hole 45 is for ensuring the drainage volume during heavy rain or the like. The fitting 10 may be configured to omit the drainage hole 45 and have only the drainage hole 44.

[0023] The side walls 41 and 42 are plate portions that form the interior and exterior sides of the opening groove 32. The side walls 41 and 42 each rise inward from the side wall 40 and face each other across the opening groove 32. The exterior side wall 41 forms the exterior surface 41a of the lower frame 12b. An attachment material 21 is engaged with the upper end of the interior side wall 42. The backup material 33 and sealing material 34 are interposed between the exterior side wall 41 and the surface of the exterior glass pane 28. The backup material 33 and sealing material 34 are also interposed between the interior side wall 42 and attachment material 21 and the surface of the interior glass pane 29.

[0024] The vertical wall 43 is a plate portion adjacent to the outer periphery of the opening groove 32. The vertical wall 43 rises outward from the horizontal wall 40. The vertical wall 43 forms the exterior surface 43a of the lower frame 12b. In the depth direction, the vertical wall 43 is located on the interior side of the exterior side wall 41. Therefore, the exterior surface 43a is offset to the interior side of the exterior surface 41a, forming a space S on its exterior side. The space S serves as an outlet for rainwater discharged from the drainage holes 44 and 45. In this embodiment, the lower frame 12b has a hollow section 48 formed on the interior side of the vertical wall 43. Through holes can be formed in the vertical wall 43 to drain rainwater that has flowed from the drainage holes 45 into the hollow section 48 into the space S.

[0025] Next, an example of the configuration of the anti-sagging component 36 will be described. The anti-sagging component 36 is installed in the opening groove 32 of the lower frame 12b.

[0026] As shown in Figures 3 and 4(A), the anti-sagging component 36 is positioned directly below the surface material 14. The anti-sagging component 36 in this embodiment has a downward convex shape in side view and a rectangular shape in plan view. The anti-sagging component 36 is a metal part made of, for example, aluminum alloy, stainless steel, or steel. The anti-sagging component 36 in this embodiment is an extruded profile of aluminum alloy. This allows the anti-sagging component 36 to stably withstand the load of the surface material 14 even in the event of a fire.

[0027] The anti-sagging component 36 may have a receiving surface 36a, an installation surface 36b, and a positioning portion 36c.

[0028] The receiving surface 36a is a plane that aligns with the XZ plane and is positioned opposite the lower end surface 14a of the facing material 14. A gap 49 is provided between the receiving surface 36a and the lower end surface 14a. The gap 49 is intended to prevent the metal anti-sagging component 36 from contacting the glass facing material 14 and damaging it during normal operation (non-fire). The depth width (width in the indoor-outdoor direction) of the receiving surface 36a is equal to or greater than the depth width of the facing material 14. In this embodiment, the depth width of the receiving surface 36a is greater than the depth width of the facing material 14 and is positioned to straddle the facing material 14 in the depth direction.

[0029] Normally, the lower end surface 14a of the facing material 14 is supported by the setting block 38. The setting block 38 is fixed to the bottom surface 32a of the opening groove 32 and contacts and supports the lower end surface 14a with its upper surface. Therefore, in this embodiment, the height from the installation surface 36b of the anti-sagging component 36 to the receiving surface 36a is lower than the height of the setting block 38. This total height difference between the anti-sagging component 36 and the setting block 38 forms the gap between the receiving surface 36a and the lower end surface 14a.

[0030] A groove 36d can be formed in the receiving surface 36a. The groove 36d extends along the longitudinal direction of the lower frame 12b. The groove 36d contributes to reducing the material cost of the anti-sagging component 36. The groove 36d can also be used as a countersunk hole (countersunk groove) when fixing the anti-sagging component 36 with a screw 51, as will be described later (see Figure 5).

[0031] The mounting surface 36b is a plane that follows the XZ plane and is installed on the bottom surface 32a of the opening groove 32. The mounting surface 36b can be fixed to the bottom surface 32a with an adhesive member 50 such as double-sided adhesive tape. As shown in Figure 5, the mounting surface 36b can also be fixed to the bottom surface 32a with a fastener (screw 51) that passes through the groove 36d. In this embodiment, the depth of the mounting surface 36b of the anti-sagging component 36 is smaller than the depth of the receiving surface 36a. In this case, the center C of the depth of the mounting surface 36b coincides or approximately coincides vertically with the center of the depth of the receiving surface 36a (the width center of the groove 36d). In other words, the width center of the receiving surface 36a and the width center of the mounting surface 36b coincide or approximately coincide, and the center C coincides or approximately coincides with the center of gravity of the anti-sagging component 36.

[0032] The positioning portion 36c abuts against the outdoor-side wall 41 of the opening groove 32, positioning the anti-sagging component 36 in the depth direction within the opening groove 32. The positioning portion 36c can be made up of a fin-shaped rib that rises slightly upward from the outdoor-side end of the receiving surface 36a. Alternatively, the positioning portion 36c may be provided at the indoor-side end of the receiving surface 36a and positioned by abutting against the indoor-side wall 42 of the opening groove 32. In this embodiment, the positioning portion 36c can determine the depth position of the anti-sagging component 36 within the opening groove 32, but it does not restrict the positional displacement (movement) of the anti-sagging component 36 in the depth direction.

[0033] The anti-sagging component 36 may have a chamfered tapered surface 36e directly below the positioning portion 36c. The tapered surface 36e has a shape in which the outdoor side of the anti-sagging component 36, where the positioning portion 36c abuts against the side wall 41, is cut away, and this side is gradually offset toward the indoor side from the side wall 41.

[0034] In this type of anti-sagging component 36, the center C of the depth width of the installation surface 36b is located on the interior side of the vertical wall 43 in the depth direction. The center C of the depth width of the installation surface 36b may also be located in a position that overlaps the vertical wall 43 vertically in the depth direction. In other words, the center of gravity of the anti-sagging component 36 can be said to be located on the interior side of the vertical wall 43 in the depth direction, or in a position that overlaps the vertical wall 43 vertically.

[0035] As shown in Figure 4(A), the anti-sagging components 36 are installed at multiple positions along the longitudinal direction of the lower frame 12b. For example, the anti-sagging components 36 can be installed near both ends and near the center along the longitudinal direction of the lower frame 12b. This allows the weight of the facing material 14 to be efficiently supported in the event of a fire.

[0036] As shown in Figures 3 and 4(A), the anti-sagging component 36 may be installed in a position that overlaps with the drainage holes 44 and 45. That is, the anti-sagging component 36 has a mounting surface 36b with a depth significantly smaller than the receiving surface 36a. Therefore, the mounting surface 36b can be positioned between the drainage holes 44 and 45 that are arranged inside and outside the room, and does not block the drainage holes 44 and 45.

[0037] As shown in Figure 4(B), the anti-sagging component 36 may be installed in a position that does not overlap with the drainage holes 44 and 45, that is, in a position offset from the drainage holes 44 and 45 in the longitudinal direction of the lower frame 12b. In other words, the installation surface 36b of the anti-sagging component 36 is narrower than the receiving surface 36a and does not block the bottom surface 32a. Therefore, even when the anti-sagging component 36 is installed in a position that does not overlap with the drainage holes 44 and 45, it does not block the drainage path of rainwater flowing from the bottom surface 32a to the drainage holes 44 and 45. The setting block 38 is not shown in Figure 4(B).

[0038] As described above, the joinery 10 of this embodiment is equipped with a sagging prevention component 36 in the opening groove 32 of the lower frame 12b, which is a frame material. The sagging prevention component 36 has a receiving surface 36a positioned opposite the lower end surface 14a of the facing material 14, and an installation surface 36b installed on the bottom surface 32a of the opening groove 32. The center C of the depth width of the installation surface 36b is either in a position that overlaps the vertical wall 43 vertically in the depth direction, or in a position that is on the interior side of the vertical wall 43.

[0039] In this type of joinery 10, if the setting block 38 burns out during a fire and the facing material 14 sags, the receiving surface 36a of the anti-sagging component 36 will support the lower end surface 14a of the facing material 14.

[0040] In this case, the installation surface 36b of the anti-sagging component 36 is located either at a position where the center C of its expected width overlaps vertically with the vertical wall 43, or at a position on the interior side of the vertical wall 43. Therefore, the load F from the facing material 14, shown by the dashed line in Figure 3, on the anti-sagging component 36 is applied to the horizontal wall 40 in the area directly above the vertical wall 43 or further interior. This allows the lower frame 12b to reliably support the load F of the facing material 14 with the vertical wall 43 while diverting the load F to the interior side of the vertical wall 43. As a result, the lower frame 12b is less likely to deform in such a way that the horizontal wall 40 and the side wall 41 above it, which protrude above the space S, fall outwards. Consequently, the risk of the lower frame 12b deforming during a fire, causing structural damage or water leakage, is also reduced. Furthermore, the lower frame 12b is less likely to form through holes around the facing material 14 that would allow flames and smoke to pass through in the interior-exterior direction, thus providing high fire resistance. Furthermore, even if the setting block 38 is damaged, the lower frame 12b is less likely to deform, which suppresses misalignment and detachment of the facing material 14, and improves the quality of the joinery 10. Moreover, since the joinery 10 does not require the space S to be reinforced with other parts such as crush prevention parts, it is possible to reduce parts costs and simplify construction by reducing the number of parts.

[0041] The anti-sagging component 36 can also be configured such that its center of gravity is either positioned so as to overlap vertically with the vertical wall 43 in the depth direction, or so as to be located on the interior side of the vertical wall 43. In this case, the door 10 can more reliably support the load of the anti-sagging component 36, which is subjected to the load F of the facing material 14, with the vertical wall 43.

[0042] The panel 14 is made of double-glazed glass with a fire-resistant glass pane 28 on the exterior side. For example, if the interior glass pane 29 is non-fire-resistant float glass, the glass pane 29 will burn or break in the event of a fire. On the other hand, the exterior glass pane 28 remains even in the event of a fire, so most of the load F of the panel 14 is the weight of the glass pane 28. The panel 14 has a thickness that extends almost the entire width of the depth of the opening groove 32. Therefore, as shown in Figure 3, the center of the thickness of the glass pane 28 may be located on the exterior side of the vertical wall 43 in the depth direction. This structure makes the lower frame 12b more susceptible to deformation toward the exterior side due to the load F of the panel 14 (glass pane 28) applied to the anti-sagging component 36 in the event of a fire. However, despite this structure, the joinery 10 is configured so that the center C of the installation surface 36b is located on the interior side of the vertical wall 43, thereby reducing the risk of deformation of the lower frame 12b.

[0043] The anti-sagging component 36 may have a positioning portion 36c that abuts against the indoor or outdoor side walls 41, 42 that form the opening groove 32. This makes it easier to position the anti-sagging component 36 in the projection direction during installation on the lower frame 12b. In particular, as shown in Figure 4(A), when the anti-sagging component 36 is installed in a position that overlaps with the drain holes 44, 45, there is the advantage that it can be easily installed in a projection position where the installation surface 36b does not block the drain holes 44, 45. In particular, the anti-sagging component 36 of this embodiment has a structure in which the installation surface 36b is hidden below the receiving surface 36a. Therefore, having a positioning portion 36c in the anti-sagging component 36 makes it easier to position the anti-sagging component 36 when it is placed from above on the bottom surface 32a of the opening groove 32.

[0044] The configuration of the anti-sagging component is not limited to the anti-sagging component 36 shown in Figures 3 and 5. The anti-sagging component 54 shown in Figure 6 has a configuration in which the receiving surface 36a does not have a groove portion 36d. Because the anti-sagging component 54 has an even simpler shape, it can be easily manufactured not only by extrusion molding but also by machining, for example, using a CNC machine tool.

[0045] The anti-sagging component 56 shown in Figure 7 has a hollow shape with a hollow section 57 on the inside. The hollow shape of the anti-sagging component 56 reduces material costs and further reduces component costs.

[0046] As described above, a joinery according to one aspect of the present invention comprises a frame material having an opening groove, a face material whose lower edge is supported within the opening groove, and a sagging prevention component provided within the opening groove. The frame material has a horizontal wall forming the bottom surface of the opening groove and a vertical wall forming a visible surface on the outer periphery of the horizontal wall. The sagging prevention component has a receiving surface positioned opposite the lower end surface of the face material and an installation surface installed on the bottom surface of the opening groove. The center of the depth width of the installation surface is either at a position that overlaps the vertical wall vertically in the depth direction or at a position on the interior side of the vertical wall. With this configuration, when the face material sags during a fire, the load of the sagging prevention component, which receives the load, is applied to the frame material via the installation surface whose center of depth width is located directly above the vertical wall or on the interior side of the vertical wall. As a result, the frame material can withstand the load with the vertical wall while releasing this load to the interior side of the vertical wall to suppress deformation. Therefore, the frame material does not need to add separate parts such as crush prevention components, and component costs can be reduced.

[0047] The center of gravity of the anti-sagging component may be positioned either vertically overlapping with the vertical wall in the depth direction or on the interior side of the vertical wall. This allows the vertical wall to more reliably support the load of the anti-sagging component, which is loaded with the surface material, and further reduces the risk of deformation of the frame material.

[0048] The aforementioned facing material is composed of double-glazed glass with fire-resistant glass on at least the exterior side, and the center of the thickness of the fire-resistant glass may be configured to be on the exterior side of the vertical wall in the depth direction. In this configuration, the fire-resistant glass, which is more likely to remain in the event of a fire, is on the exterior side of the vertical wall, while the load of the anti-sagging component that receives the load of the fire-resistant glass can be supported by the vertical wall.

[0049] The aforementioned anti-sagging component may have a positioning portion that abuts against the indoor or outdoor side wall forming the opening groove. This makes it easier to position the anti-sagging component in the depth direction during installation on the frame material.

[0050] The anti-sagging component is a metal part in which the depth of the receiving surface is greater than the depth of the installation surface, and the installation surface may be fixed to the bottom surface of the opening groove with an adhesive member or fastener. In this configuration, the anti-sagging component can stably support the load of the surface material even in the event of a fire.

[0051] A gap may be provided between the receiving surface of the anti-sagging component and the lower end surface of the surface material. This would prevent the anti-sagging component from contacting the surface material under normal circumstances and causing damage.

[0052] It should be noted that the present invention is not limited to the embodiments described above, and can be freely modified without departing from the spirit of the invention.

[0053] Although the above example uses a fixed window 10, the frame material on which the anti-sagging component 36 etc. is installed is not limited to the components of the frame 12 fixed to the building structure. For example, the frame material on which the anti-sagging component 36 is installed may be the frame material of a sash, and the window with this configuration may be a sliding window or casement window other than a fixed window.

[0054] In the above example, a setting block 38 is provided as a support member for the surface material 14, positioned differently from the anti-sagging component 36. However, the setting block may be installed, for example, on the receiving surface 36a and positioned to fill the gap 49. [Explanation of symbols]

[0055] 10 Door / window, 12 Frame, 12a Top frame, 12b Bottom frame, 12c, 12d Vertical frame, 14 Facing material, 14a Bottom end surface, 28, 29 Glass plate, 32 Opening groove, 32a Bottom surface, 36, 54, 56 Anti-sagging parts, 36a Receiving surface, 36b Installation surface, 36c Positioning part, 40 Side wall, 41, 42 Side wall, 43 Vertical wall, 44, 45 Drainage hole

Claims

1. It is a door or window, A frame material having an opening groove, A surface material whose lower edge is supported within the opening groove, A lowering prevention component provided in the opening groove, Equipped with, The frame material has a horizontal wall that forms the bottom surface of the opening groove and a vertical wall that forms the visible surface on the outer periphery of the horizontal wall. The aforementioned anti-sagging component has a receiving surface positioned opposite the lower end surface of the surface material, and an installation surface installed on the bottom surface of the opening groove, The center of the depth width of the installation surface is either at a position where it overlaps vertically with the vertical wall in the depth direction, or at a position on the interior side of the vertical wall. A type of joinery characterized by its features.

2. A joinery according to claim 1, The center of gravity of the aforementioned anti-sagging component is located either at a position that overlaps vertically with the vertical wall in the depth direction, or at a position that is more towards the interior of the room than the vertical wall. A type of joinery characterized by its features.

3. A joinery according to claim 1 or 2, The aforementioned surface material is composed of double-glazed glass having fire-resistant glass on at least the exterior side. The center of the thickness of the fire-resistant glass is located on the exterior side of the vertical wall in the depth direction. A type of joinery characterized by its features.

4. A joinery according to claim 1, The aforementioned anti-sagging component has a positioning portion that abuts against the indoor or outdoor side wall that forms the opening groove. A type of joinery characterized by its features.

5. A joinery according to claim 1, The aforementioned anti-sagging component is a metal component in which the depth of the receiving surface is greater than the depth of the installation surface. The mounting surface is fixed to the bottom surface of the opening groove with an adhesive member or fastener. A type of joinery characterized by its features.

6. A joinery according to claim 1, There is a gap between the receiving surface of the anti-sagging component and the lower end surface of the surface material. A type of joinery characterized by its features.

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