Curtain wall
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- SHIMIZU CORP
- Filing Date
- 2022-06-24
- Publication Date
- 2026-08-04
AI Technical Summary
【0009】 本発明に係るカーテンウォールは、縦枠の一部である室内側見込壁にウィンドバリアを形成する第1縦枠シール部を配設し、レインバリアを形成する第2縦枠シール部を室外側見込壁の中でパネルの建物の室内側の内壁面の見込方向における位置よりも室外側となる位置に配設して、第1縦枠シール部と第2縦枠シール部との間に縦等圧空間を形成するとともに、縦等圧空間の室外側気密ラインをパネルの内壁面の見込方向における位置よりも室外側となる位置に設定している。即ち、室内側見込壁と室内側見込壁との間に形成される空間よりも間隔が小さくなる室外側見込壁と室外側見込壁との間に形成される空間を縦等圧空間として活用し、従来よりも縦等圧空間を室外側に近づけて形成している。そのため、従来とは異なり、アルミ等で構成されるへこみ部、及びレインバリアとなるガスケットが取り付けられへこみ部に係合する突起等を削減している。したがって、縦枠の総重量を従来よりも軽くできる。また、従来よりも室外側に近づけて縦等圧空間を形成しているため、縦枠の外気によって冷やされる面積が小さくなり防露性が向上する。
Smart Images
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Abstract
Description
Technical Field
[0001] Embodiments of the present invention relate to a curtain wall having watertightness.
Background Art
[0002] For buildings such as super high-rise buildings, curtain walls having watertightness are used (see, for example, Patent Document 1). A curtain wall is attached to the building frame and installed side by side on the wall of the building. An equal-pressure space having the same pressure as the outside is formed on the indoor side between adjacent curtain walls, ensuring watertightness and suppressing the inflow of rainwater or the like into the room due to air flow.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] In a conventional curtain wall, the number of components in a sash frame or the like for forming an equal-pressure space is large, and the total weight of the curtain wall is heavy. Therefore, in a curtain wall, there is a problem of reducing the number of components in a sash frame or the like and reducing the total weight while ensuring watertightness.
Means for Solving the Problems
[0005] A curtain wall according to the present invention, which forms the exterior wall of a building, comprises a frame having vertical frames and horizontal frames, and a panel housed in an opening in the frame, wherein the vertical frame comprises an interior-side facing wall extending in the depth direction of the building, a facing wall connected to the exterior end of the interior-side facing wall of the building and extending in the width direction, an exterior-side facing wall extending from the facing wall toward the exterior in the depth direction and facing the width direction side edge of the panel, a first vertical frame seal portion disposed on the interior-side facing wall, and a second vertical frame seal portion disposed on the exterior-side facing wall at a position further outward than the intermediate position of the panel in the depth direction, wherein a vertical isobaric space is formed between the first vertical frame seal portion and the second vertical frame seal portion, and the exterior airtight line of the vertical isobaric space is set at a position further outward than the position of the panel on the interior wall surface on the interior side of the building in the depth direction, The sealing portion provided on the interior wall is only the first vertical frame sealing portion. The horizontal frame comprises an interior vertical wall extending in the height direction of the building, an interior support plate connected to the end of the interior vertical wall in the height direction and extending in the depth direction, an exterior vertical wall located on the exterior side of the interior vertical wall and extending in the height direction, an exterior support plate extending from the exterior vertical wall toward the exterior in the depth direction and facing the height direction side edge of the panel, a first horizontal frame seal portion disposed on the interior support plate, and a second horizontal frame seal portion disposed on the exterior support plate at a position further outward than the intermediate position of the panel in the depth direction, forming a lateral equal-pressure space between the first horizontal frame seal portion and the second horizontal frame seal portion, and setting the exterior airtight line of the lateral equal-pressure space at a position further outward than the position of the interior wall surface of the panel in the depth direction. Furthermore, the only sealing portion provided on the indoor support plate is the first horizontal frame sealing portion. .
[0006] In the curtain wall according to the present invention, for example, the first vertical frame sealing portion comprises a vertical frame engaging recess, a vertical frame engaging projection that engages with the vertical frame engaging recess, and a first vertical frame gasket disposed on the vertical frame engaging projection, the second vertical frame sealing portion is a second vertical frame gasket, the first horizontal frame sealing portion comprises a horizontal frame engaging recess, a horizontal frame engaging projection that engages with the horizontal frame engaging recess, and a first horizontal frame gasket disposed on the horizontal frame engaging projection, the second horizontal frame sealing portion is a second horizontal frame gasket.
[0007] In the curtain wall according to the present invention, for example, the first vertical frame sealing portion is disposed in a region closer to the visible wall than the intermediate position in the depth direction of the interior-side depth wall. It is being done .
[0008] In the curtain wall according to the present invention, for example, the first horizontal frame sealing portion is disposed in a region closer to the outdoor vertical wall than the intermediate position of the indoor support plate in the depth direction. It is being done . [Effects of the Invention]
[0009] The curtain wall according to the present invention has a first vertical frame seal portion that forms a wind barrier on the interior-side facing wall, which is part of the vertical frame, and a second vertical frame seal portion that forms a rain barrier, which is positioned on the exterior-side facing wall at a location that is further outward than the position of the panel on the interior wall surface on the interior side of the building in the facing direction. This forms a vertical isobaric space between the first and second vertical frame seal portions, and sets the exterior airtight line of the vertical isobaric space at a location that is further outward than the position of the panel on the interior wall surface in the facing direction. In other words, the space formed between the exterior-side facing walls, which has a smaller gap than the space formed between the interior-side facing walls, is utilized as the vertical isobaric space, and the vertical isobaric space is formed closer to the exterior than in conventional designs. Therefore, unlike conventional designs, recessed portions made of aluminum or the like, and protrusions that engage with the recessed portions to which gaskets that form a rain barrier are attached are reduced. Consequently, the total weight of the vertical frame can be made lighter than in conventional designs. Furthermore, because the vertical isobaric space is formed closer to the outside than in conventional designs, the area of the vertical frame that is cooled by the outside air is reduced, improving condensation prevention.
[0010] Furthermore, a first horizontal frame seal portion, which forms a wind barrier, is provided on the indoor support plate, which is part of the horizontal frame, and a second horizontal frame seal portion, which forms a rain barrier, is provided on the outdoor support plate at a position further outward than the position in the depth direction of the inner wall surface of the panel. This creates a lateral isobaric space between the first and second horizontal frame seal portions, and sets the outdoor airtight line of the lateral isobaric space at a position further outward than the position in the depth direction of the inner wall surface of the panel. In other words, the space formed between the outdoor support plates, which is smaller in spacing than the space formed between the indoor support plates, is utilized as the lateral isobaric space, and the lateral isobaric space is formed closer to the outside than in conventional designs. Therefore, unlike conventional designs, recessed parts made of aluminum or the like, and protrusions that engage with the recessed parts to which gaskets that form a rain barrier are attached, are reduced. Consequently, the total weight of the horizontal frame can be reduced compared to conventional designs. In addition, because the lateral isobaric space is formed closer to the outside than in conventional designs, the area of the horizontal frame that is cooled by the outside air is reduced, improving condensation prevention. [Brief explanation of the drawing]
[0011] [Figure 1] This is an example of a front view from the outside of the building of the curtain wall of this embodiment, which is attached to the building's structure and forms the building's exterior wall. [Figure 2] This is a cross-sectional view of the curtain wall of this embodiment, cut along the line F1-F1 in Figure 1, illustrating the location of the longitudinal isobaric space. [Figure 3] This is a cross-sectional view of the curtain wall of this embodiment, cut along the line F2-F2 in Figure 1, illustrating the location of the lateral isobaric space. [Modes for carrying out the invention]
[0012] An embodiment of the present invention will be described below with reference to Figures 1 to 3. Note that the components and descriptions of these components may be described using multiple expressions. The components and their descriptions are examples and are not limited by the expressions of this specification. Components may also be identified by names different from those used herein.
[0013] Figure 1 is a schematic front view showing the curtain wall 1 according to this embodiment. Figure 2 is a cross-sectional view showing a part of the curtain wall 1 of this embodiment along the line F1-F1 in Figure 1, showing the location where two panel units 11 are adjacent in the X direction. Figure 3 is a vertical cross-sectional view showing a part of the curtain wall 1 of this embodiment along the line F2-F2 in Figure 1, showing the location where two panel units 11 are adjacent in the Z direction.
[0014] The curtain wall 1 shown in Figure 1, which is a panel, forms, for example, the exterior wall of a building (not shown). As shown in each drawing, the X-axis, Y-axis, and Z-axis are defined herein for convenience. The X-axis, Y-axis, and Z-axis are orthogonal to each other. The X-axis is provided along the width of the curtain wall 1, the Y-axis is provided along the depth of the curtain wall 1, and the Z-axis is provided along the height of the curtain wall 1. The X-direction (width direction) includes the +X-direction and the -X-direction. The Y-direction (depth direction) includes the +Y-direction and the -Y-direction. The Z-direction includes the +Z-direction (upward) and the -Z-direction (downward). The +Y-direction is the direction from the interior to the exterior of the building and is also called the exterior side. The -Y-direction is the direction from the exterior to the interior of the building and is also called the interior side.
[0015] As shown in Figure 1, the curtain wall 1 has a plurality of panel units 11 that are installed in a row in the height direction (Z direction) and the width direction (X direction). The panel units 11 are pre-assembled as units before being installed on the building's structure (not shown). The plurality of panel units 11 are combined with each other to form the curtain wall 1. Each of the plurality of panel units 11 is attached to the building's structure (not shown) by fasteners or the like.
[0016] Each of the multiple panel units 11 has a frame 2 and multiple panels 22 and 23. Panels 22 and 23 are examples of exterior wall materials. The frame 2 has an upper horizontal frame 5 and a lower horizontal frame 6, two vertical frames 33, an intermediate horizontal frame 7, and an intermediate vertical frame 35. Note that the intermediate horizontal frame 7 and intermediate vertical frame 35 may be omitted from the frame 2. The upper horizontal frame 5, lower horizontal frame 6, vertical frame 33, intermediate horizontal frame 7, and intermediate vertical frame 35 are made from profiles of aluminum or the like formed by extrusion molding or the like.
[0017] The upper horizontal frame 5, the lower horizontal frame 6, and the intermediate horizontal frame 7 extend in the approximate X direction. The lower horizontal frame 6 is spaced apart from the upper horizontal frame 5 in the approximate -Z direction. The intermediate horizontal frame 7 is positioned between the upper horizontal frame 5 and the lower horizontal frame 6. The two vertical frames 33 extend in the approximate Z direction between both ends of the upper horizontal frame 5 and both ends of the lower horizontal frame 6. The intermediate vertical frame 35 is positioned between the two vertical frames 33 and extends in the approximate Z direction between the upper horizontal frame 5 and the lower horizontal frame 6.
[0018] A plurality of openings 37, 38 are provided in the frame body 2. The opening 37 is surrounded by the lower horizontal frame 6, the vertical frame 33, the intermediate horizontal frame 7, and the intermediate vertical frame 35. The opening 38 is surrounded by the upper horizontal frame 5, the vertical frame 33, the intermediate horizontal frame 7, and the intermediate vertical frame 35. The panels 22, 23 fitted and housed in the openings 37, 38 are, for example, laminated glass, but may also be single-pane glass. Note that the panels 22, 23 may be spaced apart from the edges (inner peripheral surfaces) of the openings 37, 38.
[0019] As shown in FIG. 2, adjacent vertical frames 33 in the X direction include an indoor-side prospective wall 41 located on the -Y direction side (indoor side), a finding wall 42 connected to the end on the +Y direction side (outdoor side) of the indoor-side prospective wall 41, an outdoor-side prospective wall 43 extending from the finding wall 42 toward the outdoor side in the prospective direction, and an outermost wall 44 located on the outdoor side. [[ID=IO]]
[0020] In the example of FIG. 2, the indoor-side prospective wall 41, the finding wall 42, the outdoor-side prospective wall 43, and the outermost wall 44 are provided on the vertical frame 33 and are also provided on an intermediate vertical frame 35 not shown. Hereinafter, the vertical frame 33 shown in FIG. 2 will be mainly described. The panel 23 and the intermediate vertical frame 35 shown in FIG. 1 can be understood by reading the panel 22 and the vertical frame 33 in the following description as the panel 23 and the intermediate vertical frame 35. Also, in the following description, for convenience, in the X direction, the direction toward the center of the corresponding panel 22 may be referred to as the inner peripheral side. Also, in the X direction, the direction toward the outside of the corresponding panel 22 may be referred to as the outer peripheral side.
[0021] The indoor projected wall 41 is formed in a plate shape extending along the Y-Z plane. The indoor projected wall 41 has an inner peripheral surface 41a and an outer peripheral surface 41b located on the opposite side in the X direction with respect to the inner peripheral surface 41a. In the example shown in FIG. 2, the inner peripheral surface 41a and the outer peripheral surface 41b are formed substantially flat. A first vertical frame seal portion 45 is formed in a region of the outer peripheral surface 41b of the two indoor projected walls 41 that is closer to the finding wall 42. In the example shown in FIG. 2, the first vertical frame seal portion 45 is formed in a region closer to the finding wall 42 than the intermediate position in the Y direction of the outer peripheral surface 41b. This is to bring the vertical equal-pressure space 28, which will be described later, closer to the outdoor side.
[0022] For example, on the indoor projected wall 41 located on the -X direction side, a pair of protruding pieces protruding toward the outer peripheral surface 41b of the indoor projected wall 41 on the +X direction side are formed, and a vertical frame engaging recess portion 450 constituting the first vertical frame seal portion 45 is formed between the pair of protruding pieces.
[0023] On the indoor projected wall 41 located on the +X direction side, a vertical frame engaging protrusion 451 that constitutes the first vertical frame seal portion 45 and can be inserted into the vertical frame engaging recess portion 450 is formed. The vertical frame engaging protrusion 451 has a mounting groove, and a first vertical frame gasket 453 is disposed between the mounting grooves. When the vertical frame engaging protrusion 451 is inserted into the vertical frame engaging recess portion 450, the lip of the first vertical frame gasket 453 contacts one of the protruding pieces forming the vertical frame engaging recess portion 450 in the Y direction. And the contact portion between the lip of the first vertical frame gasket 453 and the inner surface of the vertical frame engaging recess portion 450 becomes the indoor side airtight line 284 of the vertical equal-pressure space 28 formed between the vertical frames 33 in the height direction. Note that the first vertical frame gasket 453, which serves as a window barrier and intervenes as a partition between the vertical equal-pressure space 28 and the interior, is formed of an elastic body such as ethylene propylene diene (EPDM) rubber, for example.
[0024] The visible wall 42 is integrally connected to the outdoor end of the indoor-side visible wall 41 and extends substantially outward. The distance between the indoor-side visible walls 41 in the visible direction is greater than the distance between the outdoor-side visible walls 43 in the visible direction. The visible wall 42 has an outer surface 42a that is formed substantially flat and faces outward.
[0025] On the outer surface 42a of the visible wall 42, for example, a gasket mounting projection is provided protruding toward the exterior side. The gasket 425 is attached in a fitted state to the gasket mounting projection, and the gasket 425 is in contact with the interior wall surface 22a, which is the interior side of the panel 22.
[0026] The exterior facing wall 43, which is formed in a plate shape and extends along the YZ plane, extends in the +Y direction, which is the exterior direction, from the end on the outer periphery side of the facing wall 42. Therefore, the interior facing wall 41, the facing wall 42, and the exterior facing wall 43 are connected to each other in a roughly stepped manner. The exterior end of the exterior facing wall 43 is located on the exterior side of the exterior wall surface 22b, which is the opposite side of the interior wall surface 22a of the panel 22.
[0027] The exterior facing wall 43 has an inner circumferential surface 43a and an outer circumferential surface 43b located opposite the inner circumferential surface 43a in the X direction. The inner circumferential surface 43a of the exterior facing wall 43 faces the facing-direction side edge 227 of the panel 22. Mounting grooves 434 are formed on the outer circumferential surface 43b of each exterior facing wall 43, and a second vertical frame seal portion 437 is disposed between either of the mounting grooves 434, i.e., the mounting groove 434 on the +X direction side in the example of Figure 2. The second vertical frame seal portion 437 is a second vertical frame gasket 437. The lip of the second vertical frame gasket 437 contacts the exterior facing wall 43 of the vertical frame 33 located on the -X direction side. The second vertical frame gasket 437 is disposed in the exterior facing wall 43 at a position that is further outward than the position of the inner wall surface 22a of the panel 22 in the facing direction. In particular, in this embodiment, the second vertical frame gasket 437 is positioned further outward than the intermediate position 229 of the panel 22, which is further outward than the inner wall surface 22a of the panel 22, within the exterior-facing wall 43. This is to bring the vertical isobaric space 28 closer to the exterior. The intermediate position 229 of the panel 22 is the intermediate position between the inner wall surface 22a and the outer wall surface 22b of the panel 22.
[0028] The second vertical frame gasket 437, which acts as a rain barrier and interposed as a partition between the outside air and the vertical isobaric space 28, is formed of, for example, EPDM rubber. The second vertical frame gasket 437 becomes the outdoor airtight line 285 of the vertical isobaric space 28 formed between the vertical frames 33. For example, the second vertical frame gasket 437 has isobaric holes (not shown) formed therein to introduce outside air into the vertical isobaric space 28 and equalize the atmospheric pressure inside the vertical isobaric space 28 with the outside air pressure. The vertical isobaric space 28 is a space with atmospheric pressure equal to the outside air pressure. Also, as shown in Figure 2, the outdoor airtight line 285 is set at a position that is on the outdoor side of the position of the inner wall surface 22a of the panel 22 in the depth direction.
[0029] A accommodating space 441 is formed in the Y direction between the visible wall 42 and the outermost plate-shaped wall 44 extending along the XZ plane, which accommodates the visible side edge 227 of the panel 22. A long, L-shaped member, a batten 438, is attached to the inner circumferential surface 43a of the exterior-facing visible wall 43, and the panel 22 is held in place by the batten 438 with a gasket 439 sandwiched between the batten 438 and the outer wall surface 22b of the panel 22. The connection between the batten 438, the gasket 439 and the outermost wall 44 is sealed. The panel 22 is located between the visible wall 42 and the outermost wall 44, and in this embodiment, it is made of laminated glass. Spacers and sealing material are placed between the glass plates.
[0030] In conventional curtain walls, the vertical isobaric space formed within the vertical frame is only formed between the interior-side facing walls. That is, engaging protrusions and recesses made of aluminum or the like for attaching the wind barrier gasket, and engaging protrusions and recesses made of aluminum or the like for attaching the rain barrier gasket, had to be formed on the interior-side facing walls, respectively. Consequently, the total weight of the vertical frame increased, and the number of structural formation steps also increased.
[0031] In this embodiment, the curtain wall 1, as shown in Figure 2, has only one first vertical frame seal portion 45 installed on the indoor side facing wall 41, and the second vertical frame seal portion 437, which is the second vertical frame gasket 437, is installed in the outdoor side facing wall 43 at a position further outward than the position of the inner wall surface 22a of the panel 22 in the facing direction. This forms a vertical isobaric space 28 from between the indoor side facing wall 41 of the vertical frame 33 to between the outdoor side facing wall 43, and sets the outdoor side airtight line 285 of the vertical isobaric space 28 at a position further outward than the position of the inner wall surface 22a of the panel 22 in the facing direction. In other words, the vertical isobaric space 28 is brought closer to the outside than in the conventional design. As a result, the number of recessed portions made of aluminum or the like, and the projections to which the gasket that acts as a rain barrier is attached and engages with the recessed portion, has been reduced by one set compared to the conventional design. Therefore, the total weight of the vertical frame 33 can be made lighter than in conventional designs. In other words, curtain walls in general, as is the case with the curtain wall 1 of this embodiment, have a structural characteristic in which the distance between the exterior facing walls 43 and the exterior facing walls 43 is smaller than the distance between the interior facing walls 41 and the interior facing walls 41 in the facing direction. In the curtain wall 1 of this embodiment, this structural characteristic can be effectively utilized to make the second vertical frame seal portion 437, which acts as a rain barrier, into a second vertical frame gasket 437, eliminating the need for a large structure like the first vertical frame seal portion 45, and as a result, the weight of the vertical frame 33 is reduced. In addition, because the vertical isobaric space 28 is formed closer to the exterior side than in conventional designs, the area of the vertical frame 33 that is cooled by the outside air is smaller than in conventional designs, improving condensation prevention.
[0032] The upper horizontal frame 5 and lower horizontal frame 6 shown in Figure 3 will be described below. The upper horizontal frame 5 includes, for example, a hollow indoor side portion 5A. The indoor side portion 5A is the indoor side portion of the upper horizontal frame 5 and is formed by an indoor vertical wall 50 that extends along the XZ plane and is formed in a plate shape, an indoor support plate 51 that extends from the upper end of the indoor vertical wall 50 in the height direction toward the outdoor side (+Y direction), and an outdoor vertical wall 52 that is located further outward than the indoor vertical wall 50 and extends along the XZ plane and is formed in a plate shape. An outdoor support plate 53 extends from the outdoor vertical wall 52 toward the outdoor side in the depth direction. Furthermore, the upper horizontal frame 5 includes an outermost wall 54 located on the outdoor side.
[0033] The lower horizontal frame 6 includes, for example, a hollow indoor portion 6A. The indoor portion 6A is the indoor side of the lower horizontal frame 6 and is formed by, for example, an indoor vertical wall 60 located on the indoor side, extending along the XZ plane and formed in a plate shape, an indoor support plate 61 extending from the indoor vertical wall 60 to the outdoor side, and an outdoor vertical wall 62 located further outdoors than the indoor vertical wall 60, extending along the XZ plane and formed in a plate shape. An outdoor support plate 63 extends from the outdoor vertical wall 62 toward the outdoor side in the depth direction. Furthermore, the lower horizontal frame 6 includes an outermost wall 64 located on the outdoor side.
[0034] The substantially flat upper surface 51b of the indoor support plate 51 of the upper horizontal frame 5 has horizontal frame engaging projections 551 that constitute the first horizontal frame seal portion 55. The horizontal frame engaging projections 551 have mounting grooves, and the first horizontal frame gasket 552 is disposed between the mounting grooves. On the other hand, a horizontal frame engaging recess portion 610 that is recessed upward is formed in one area of the lower surface 61b of the indoor support plate 61 of the lower horizontal frame 6. Preferably, the horizontal frame engaging projections 551 are disposed in an area closer to the outdoor vertical wall 52 than the intermediate position in the depth direction of the indoor support plate 51, and also preferably, the horizontal frame engaging recess portion 610 is disposed in an area closer to the outdoor vertical wall 62 than the intermediate position in the depth direction of the indoor support plate 61, because this allows the horizontal isobaric space 29 to be brought closer to the outdoor side.
[0035] The horizontal frame engagement projection 551 is inserted into the horizontal frame engagement recess 610 that constitutes the first horizontal frame seal portion 55, and the lip of the first horizontal frame gasket 552 abuts against the side surface of the horizontal frame engagement recess 610. The contact point between the lip of the first horizontal frame gasket 552, which acts as a wind barrier and interposed as a partition between the horizontal isobaric space 29 and the interior, and the inner surface of the horizontal frame engagement recess 610 becomes the interior airtight line 294 of the horizontal isobaric space 29 formed between the upper horizontal frame 5 and the lower horizontal frame 6.
[0036] On the outdoor side of the upper horizontal frame 5, beyond the indoor side portion 5A, the outdoor vertical wall 52, the outdoor support plate 53, and the outermost wall 54 form a accommodating space 5B that houses the upper edge portion 238, which is the side edge in the height direction of the panel 23. The accommodating space 5B is a groove-shaped space. The upper edge portion 238 of the panel 23 is housed in the accommodating space 5B, and a gasket 521 is placed between the indoor-facing inner wall surface 23a of the panel 23 and the outdoor-facing outer surface 520 of the outdoor vertical wall 52. A long, L-shaped member, a retaining strip 535, is attached to the lower surface of the outdoor support plate 53. With a gasket 536 sandwiched between the retaining strip 535 and the outer wall surface 23b, which is the opposite side of the inner wall surface 23a of the panel 23, the panel 23 is held down by the retaining strip 535. In addition, the connection portion between the retaining strip 535, the gasket 536, and the outermost wall 54 is sealed.
[0037] On the outdoor side of the lower horizontal frame 6, beyond the indoor side portion 6A, the outdoor vertical wall 62, the outdoor support plate 63, and the outermost wall 64 form a accommodating space 6B that houses the lower edge portion 228, which is the side edge in the height direction of the panel 22. The accommodating space 6B is a groove-shaped space. The lower edge portion 228 of the panel 22 is housed in the accommodating space 6B, and a gasket 621 is placed between the indoor-facing inner wall surface 22a of the panel 22 and the outdoor-facing outer surface 620 of the outdoor vertical wall 62. A long, L-shaped member called a trim strip 635 is attached to the upper surface of the outdoor support plate 63, and the panel 22 is held down by the trim strip 635 with a gasket 636 sandwiched between the trim strip 635 and the outer wall surface 22b, which is the opposite side of the inner wall surface 22a of the panel 22. The connection between the trim strip 635, the gasket 636, and the outermost wall 64 is sealed.
[0038] The outdoor support plate 63 of the lower horizontal frame 6 has an upper surface 630 and a substantially flat lower surface 631 located on the opposite side of the upper surface 630 in the Z direction. The outdoor support plate 53 of the upper horizontal frame 5 has a lower surface 530 and an upper surface 533 located on the opposite side of the lower surface 530 in the Z direction, with mounting grooves 532 formed therein. A second horizontal frame seal portion 537 is disposed between the mounting grooves 532. The second horizontal frame seal portion 537 is, for example, a second horizontal frame gasket 537. The lip of the second horizontal frame gasket 537 contacts the lower surface 631 of the outdoor support plate 63 which is opposite in the Z direction. The second horizontal frame gasket 537 is disposed on the outdoor support plate 63 at a position on the outdoor side that is further outward than the position of the inner wall surface 22a of panel 22 and the inner wall surface 23a of panel 23 in the depth direction. In particular, in this embodiment, the second horizontal frame gasket 537 is positioned further outward than the intermediate position 229 between panel 22 and panel 23, which is further outward than the inner wall surface 22a of panel 22 and the inner wall surface 23a of panel 23 within the outdoor support plate 63. This is to bring the lateral isobaric space 29 closer to the outdoor side.
[0039] The second horizontal frame gasket 537, which acts as a rain barrier and interposed as a partition between the outside air and the lateral isobaric space 29, becomes the outdoor airtight line 295 of the lateral isobaric space 29. The second horizontal frame gasket 537 has isobaric holes (not shown) that introduce outside air into the lateral isobaric space 29 and equalize the atmospheric pressure inside the lateral isobaric space 29 with that of the outside. Furthermore, as shown in Figure 3, the outdoor airtight line 295 is set to be on the outdoor side of the position of the inner wall surface 22a of panel 22 and the inner wall surface 23a of panel 23 in the depth direction. Note that the mounting position of the second horizontal frame gasket 537 may be on the lower surface 631 side of the outdoor support plate 63 of the lower horizontal frame 6, rather than on the upper surface 533 side of the outdoor support plate 53 of the upper horizontal frame 5.
[0040] In conventional curtain walls, the lateral isobaric space formed within the horizontal frame is only created between the indoor-side support plate of the upper horizontal frame and the indoor-side support plate of the lower horizontal frame. That is, it was necessary to form engaging protrusions and engaging recesses made of aluminum or the like for attaching the gasket that acts as a wind barrier, and engaging protrusions and engaging recesses made of aluminum or the like for attaching the gasket that acts as a rain barrier, on the indoor-side support, respectively. Consequently, the total weight of the horizontal frame increases, and the number of structural formation steps increases.
[0041] In this embodiment, the curtain wall 1 has only one sealing portion, the first horizontal frame sealing portion 55, provided on the indoor support plate 51 and the indoor support plate 61 in the upper horizontal frame 5 and the lower horizontal frame 6. The second horizontal frame sealing portion 537, which is the second horizontal frame gasket 537, is positioned on the outdoor support plate 63 at a location that is further outward than the position of the inner wall surface 22a of panel 22 and the inner wall surface 23a of panel 23 in the depth direction. A lateral isobaric space 29 is formed from between the indoor support plate 51 and the indoor support plate 61 to between the outdoor support plate 53 and the outdoor support plate 63, and the outdoor airtight line 295 of the lateral isobaric space 29 is set at a location that is further outward than the position of the inner wall surface 22a of panel 22 and the inner wall surface 23a of panel 23 in the depth direction. In other words, the lateral isobaric space 29 is brought closer to the outside than in conventional designs. Therefore, the number of recessed parts made of aluminum or the like, and the number of protrusions that engage with the gaskets that serve as rain barriers, which are attached to the recessed parts, have been reduced by one set compared to conventional designs. Consequently, the total weight of the upper horizontal frame 5 and the lower horizontal frame 6 can be made lighter than conventional designs. In other words, curtain walls in general, as is the case with the curtain wall 1 of this embodiment, have a structural characteristic in which the distance in the height direction between the outdoor support plate 53 and the outdoor support plate 63 is smaller than the distance in the height direction between the indoor support plate 51 and the indoor support plate 61. In the curtain wall 1 of this embodiment, this structural characteristic is effectively utilized so that the second horizontal frame seal part 537 that serves as a rain barrier can be made into a second horizontal frame gasket 537, eliminating the need for a large structure like the first horizontal frame seal part 55, and as a result, the weight of the upper horizontal frame 5 and the lower horizontal frame 6 is reduced. In addition, because the horizontal isobaric space 29 is formed closer to the outdoor side than conventional designs, the area of the upper horizontal frame 5 and the lower horizontal frame 6 that is cooled by the outside air is smaller than conventional designs, improving condensation prevention.
[0042] The Sustainable Development Goals (SDGs) are 17 international goals adopted at the UN Summit in September 2015. The curtain wall 1 according to this embodiment can contribute to achieving some of the 17 SDGs goals for which classification codes have been assigned, such as goal 11: "Make cities and human settlements inclusive, safe, resilient and sustainable." While embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. This novel embodiment can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. Embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents. [Explanation of symbols]
[0043] 1: Curtain Wall 22, 23: Panel 28: Longitudinal isobaric space 29: Transverse isobaric space 33: Vertical frame 41: Interior wall 42:Mitsuke wall 43: Exterior side facing wall 437: Second vertical frame gasket (second vertical frame sealing part) 44: Outermost wall 45: First vertical frame sealing section 450: Vertical frame engagement recess 451: Vertical frame engagement projection 453: First vertical frame gasket 5: Upper horizontal frame 50: Indoor vertical wall 51: Indoor support plate 52: Outdoor vertical wall 53: Outdoor support plate 537: Second horizontal frame seal section (second horizontal frame gasket) 55: First horizontal frame seal section 551: Horizontal frame engaging projection 552: First horizontal frame gasket 6: Lower horizontal frame 6A: Indoor side 60: Indoor vertical wall 61: Indoor support plate 610: Horizontal frame engagement recess 62: Exterior vertical wall 63:Outdoor support
Claims
1. A curtain wall forming the exterior wall of a building, comprising a frame having vertical and horizontal frames, and panels housed in openings formed by the vertical and horizontal frames, The vertical frame comprises an interior-side facing wall extending in the depth direction of the building, a facing wall connected to the exterior end of the interior-side facing wall of the building and extending in the width direction, an exterior-side facing wall extending from the facing wall toward the exterior in the depth direction and facing the width direction side edge of the panel, a first vertical frame seal portion disposed on the interior-side facing wall, and a second vertical frame seal portion disposed on the exterior-side facing wall at a position further outward than the intermediate position of the panel in the depth direction, forming a vertical isobaric space between the first vertical frame seal portion and the second vertical frame seal portion, and setting the exterior airtight line of the vertical isobaric space at a position further outward than the position of the panel on the interior wall surface on the interior side of the building in the depth direction, and the only seal portion disposed on the interior-side facing wall is the first vertical frame seal portion. The curtain wall comprises the horizontal frame having an interior vertical wall extending in the height direction of the building, an interior support plate connected to the end of the interior vertical wall in the height direction and extending in the depth direction, an exterior vertical wall located on the exterior side of the interior vertical wall and extending in the height direction, an exterior support plate extending from the exterior vertical wall to the exterior side in the depth direction and facing the height direction of the panel's side edge, a first horizontal frame seal portion disposed on the interior support plate, and a second horizontal frame seal portion disposed on the exterior support plate at a position further outward than the intermediate position of the panel in the depth direction, forming a lateral equal-pressure space between the first horizontal frame seal portion and the second horizontal frame seal portion, setting the exterior airtight line of the lateral equal-pressure space at a position further outward than the position of the interior wall surface of the panel in the depth direction, and the only seal portion disposed on the interior support plate being the first horizontal frame seal portion.
2. The first vertical frame seal portion comprises a vertical frame engagement recess, a vertical frame engagement projection that engages with the vertical frame engagement recess, and a first vertical frame gasket disposed on the vertical frame engagement projection. The second vertical frame sealing portion is a second vertical frame gasket. The first horizontal frame seal portion comprises a horizontal frame engagement recess, a horizontal frame engagement projection that engages with the horizontal frame engagement recess, and a first horizontal frame gasket disposed on the horizontal frame engagement projection. The curtain wall according to claim 1, wherein the second horizontal frame sealing portion is a second horizontal frame gasket.
3. The curtain wall according to claim 1 or claim 2, wherein the first vertical frame sealing portion is disposed in a region closer to the visible wall than the intermediate position in the depth direction of the interior-side depth wall.
4. The curtain wall according to claim 3, wherein the first horizontal frame sealing portion is disposed in a region closer to the outdoor vertical wall than the intermediate position in the depth direction of the indoor support plate.