Curtain wall
The curtain wall system ensures consistent watertightness and reduces manufacturing costs by using fitting portions to create an equal-pressure space between unit curtain walls, addressing the challenges of complex fitting structures and worker skill variations.
Patent Information
- Application Number
- JP2024111210
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2026-01-23
AI Technical Summary
Existing curtain wall systems face challenges in maintaining watertightness when unit curtain walls are installed adjacent to a building's exterior wall, as they require complex fitting structures that increase manufacturing costs and are sensitive to worker skill levels, leading to variations in watertightness.
A curtain wall design where unit curtain walls have frames with fitting portions that form horizontal and vertical spaces, using outdoor and indoor tight-fitting materials with regulating portions to create an isobaric space equal to outdoor pressure, ensuring consistent watertightness regardless of worker skill.
The design prevents water entry by creating an equal-pressure space around the frame, maintaining consistent watertightness and reducing manufacturing complexity and costs by directly determining the relative positions of the unit curtain walls.
Smart Images
Figure 2026010990000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to a curtain wall in which unit curtain walls are arranged side by side one above the other with their vertical frames adjacent to the exterior wall side of a building. [Background technology]
[0002] In curtain walls constructed by arranging multiple unit curtain walls side by side, an equal-pressure space is formed at the joints of the unit curtain walls to prevent water from entering the room. Methods for forming an equal-pressure space are described, for example, in Patent Documents 1 and 2. Patent Document 1 describes a method in which an annular seal material is provided on the outside of the room and an annular seal material on the inside of the room around the frame, and the unit curtain walls are arranged side by side with these annular seal materials abutting against each other, thereby forming an equal-pressure space between the annular seal materials. Patent Document 2 describes a method in which fitting portions are provided at the opposing portions of adjacent frame bodies, and when the unit curtain walls are arranged side by side, the fitting portions fit together to form an equal-pressure space between the fitting portions. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Patent Publication No. 2021-95748 [Patent Document 1] Japanese Patent Application Publication No. 7-180246 Summary of the Invention [Problem to be solved by the invention]
[0004] In the method of attaching annular seals to the frame, the relative position of the unit curtain walls directly affects watertightness. This raises concerns that ensuring sufficient watertightness may be difficult depending on the skill level of the worker. In contrast, in the method of attaching fittings to the frame, the relative position of the unit curtain walls is directly determined, preventing variations in watertightness due to the skill level of the worker. However, when installing unit curtain walls so that the frame's vertical frame is adjacent to the side of the building's exterior wall, a fitting structure cannot be applied between the frame and the exterior wall. Therefore, it is necessary to prepare frame materials with fittings that fit into the fittings of the vertical frame and interpose them between the frame and the exterior wall. This increases the number of parts to be handled, which may lead to problems such as increased manufacturing costs.
[0005] In view of the above situation, the present invention aims to provide a curtain wall that can prevent variations in watertightness while suppressing increases in manufacturing costs even when a unit curtain wall is installed adjacent to the side of an exterior wall. [Means for solving the problem]
[0006] In order to achieve the above object, the curtain wall of the present invention is a curtain wall in which unit curtain walls each having a frame body with upper and lower horizontal frames and left and right vertical frames are arranged side by side one above the other with at least one of the vertical frames adjacent to the side of the exterior wall of a building, one of the horizontal frames is provided with a first fitting portion extending along the length, and the other horizontal frame is provided with a second fitting portion extending along the length and fitting into the first fitting portion of an adjacent unit curtain wall to form a horizontal frame space along the length of the horizontal frames between them, and the vertical frames are provided with a front fitting portion at the portion facing the side of the exterior wall. The outdoor tight-fitting material and the indoor tight-fitting material are arranged vertically above and below, respectively, and form a vertical frame space between them by abutting against the side of the exterior wall; the upper end of the outdoor tight-fitting material and the upper end of the indoor tight-fitting material are provided with upper end regulating portions that abut against them to block the vertical frame space; lower end regulating portions are provided at the ends of the first fitting portion and the second fitting portion; the lower end of the indoor tight-fitting material abuts against the lower end regulating portion, while a gap reaching to the outside is secured between the lower end of the outdoor tight-fitting material and the lower end of the outdoor tight-fitting material; and the horizontal frame space is connected to the vertical frame space via the lower end regulating portion. [Effects of the Invention]
[0007] According to this invention, a vertical frame space can be formed between the outdoor and indoor tight-fitting materials by abutting them against the exterior wall surfaces, and this vertical frame space is connected to the horizontal frame space and the outside by the lower end restriction part. This allows for the creation of an isobaric space around the frame body that is equal to the outside pressure, making it possible to prevent water from entering the inside of the room. Moreover, because the relative positions of the unit curtain walls are directly determined by the fitting parts, variation in watertightness can be prevented regardless of the skill level of the worker. [Brief explanation of the drawings]
[0008] [Figure 1] 1 is a longitudinal cross-sectional view of a main part of a building to which a curtain wall according to an embodiment of the present invention is applied. [Figure 2] FIG. 2 is a cross-sectional view of a main part of the building shown in FIG. [Figure 3] 2 is an enlarged vertical cross-sectional view showing a connecting portion between a lower frame and an upper frame of a unit curtain wall that constitutes a curtain wall in the building shown in FIG. 1. FIG. [Figure 4] FIG. 2 is a perspective view of a connecting portion between a lower frame and an upper frame of a unit curtain wall that constitutes a curtain wall in the building shown in FIG. 1, viewed from outside the room. [Figure 5] FIG. 2 is an exploded perspective view of the connecting portion between the lower frame and upper frame of the unit curtain wall that constitutes the curtain wall in the building shown in FIG. 1, viewed from outside the room. [Figure 6] FIG. 2 is a side view of the main part of the connecting portion between the lower frame and upper frame of the unit curtain wall that constitutes the curtain wall in the building shown in FIG. 1, viewed from the left vertical frame side. [Figure 7] This is an exploded side view, viewed from the left vertical frame side, of the state in which the indoor tight-fitting material, outdoor tight-fitting material, upper end regulating portion, and lower end regulating portion have been removed at the connection portion between the lower frame and upper frame of the unit curtain wall that constitutes the curtain wall in the building shown in Figure 1. [Figure 8] FIG. 2 is an exploded side view of the connecting portion between the lower frame and upper frame of the unit curtain wall that constitutes the curtain wall in the building shown in FIG. 1, viewed from the left vertical frame side. [Figure 9] FIG. 2 is a plan view of the main part showing the left portion of the unit curtain wall that constitutes the curtain wall in the building shown in FIG. 1. [Figure 10] FIG. 2 is an exploded plan view of the main part showing the left portion of the unit curtain wall that constitutes the curtain wall in the building shown in FIG. [Figure 11] FIG. 2 is a vertical cross-sectional view of the left portion of a unit curtain wall that constitutes a curtain wall in the building shown in FIG. 1, as viewed from the outside of the room. [Figure 12] FIG. 2 is an exploded vertical cross-sectional view of the left portion of a unit curtain wall that constitutes a curtain wall in the building shown in FIG. 1, viewed from the outside of the room. [Figure 13]FIG. 2 is a vertical cross-sectional view of the left portion of a unit curtain wall that constitutes a curtain wall in the building shown in FIG. 1, as viewed from the inside of the room. [Figure 14] FIG. 2 is an exploded vertical cross-sectional view of the left portion of a unit curtain wall that constitutes a curtain wall in the building shown in FIG. 1, as viewed from the inside of the room. [Figure 15] FIG. 2 is an end view showing the upper frame of a unit curtain wall that constitutes the curtain wall in the building shown in FIG. 1. [Figure 16] FIG. 2 is an end view showing the lower frame of a unit curtain wall that constitutes the curtain wall in the building shown in FIG. 1. [Figure 17] FIG. 2 is an end view showing the right vertical frame of a unit curtain wall that constitutes the curtain wall in the building shown in FIG. 1. [Figure 18] FIG. 2 is an end view showing the left vertical frame of a unit curtain wall that constitutes the curtain wall in the building shown in FIG. 1. [Figure 19] This shows the catch pan to be applied to the curtain wall shown in Figure 1, where (a) is a view from the outer periphery and (b) is a view from the inner periphery. DETAILED DESCRIPTION OF THE INVENTION
[0009] A preferred embodiment of the curtain wall according to the present invention will be described in detail below with reference to the accompanying drawings. Note that, for convenience, the terms "prospect direction" and "visibility direction" will be used below. The prospect direction is the direction along the depth of the curtain wall, as indicated by arrow A in the drawing. A surface along the prospect direction will sometimes be referred to as a "prospect face." The prospect direction is the direction perpendicular to the prospect direction for items that extend horizontally, such as sill frames. For items that extend vertically, such as vertical frames, the horizontal direction perpendicular to the prospect direction is called the "prospect direction." A surface along the prospect direction will sometimes be called a "prospect face."
[0010] 1 to 14 show a building to which a curtain wall according to an embodiment of the present invention is applied. The building illustrated here has ceiling panels C installed between an upper floor slab S and a lower floor slab S, thereby forming a living space below the ceiling panels C and a ceiling space above the ceiling panels C. Curtain walls, which form the exterior walls of the building, are installed on the exterior sides of the upper and lower floor slabs S. The curtain wall is constructed by arranging multiple unit curtain walls 1 vertically between an exterior wall panel P on the left side and a support frame F on the right side when viewed from the exterior. The exterior wall panel P is made of concrete, such as precast concrete, and is configured to have a greater thickness than the unit curtain wall. The support frame F is made of metal, such as aluminum alloy, and is disposed opposite the side surface (exterior wall side surface) p1 of the exterior wall panel P. In the illustrated example, a support frame F having a support frame main body f1 and two support fitting fins f2 is used. The support frame body f1 has a hollow rectangular cross section. The support fitting fins f2 extend parallel to each other from the side surface of the support frame body f1 facing the side surface p1 of the exterior wall panel P, then bend toward each other, and further bend away from the support frame body f1, extending parallel to each other.
[0011] The unit curtain wall 1 comprises a frame 10 made up of an upper frame (horizontal frame) 11, a lower frame (horizontal frame) 12, and left and right vertical frames 13, 14, and a panel 20 such as double-glazed glass disposed inside the frame. The upper frame 11, lower frame 12, and vertical frames 13, 14 are formed from a metal such as an aluminum alloy, and are configured so that the dimensions along the thickness of the panel 20 are approximately equal to each other. A transom 15 is provided between the left and right vertical frames 13, 14, on the interior side of the panel 20. A fire-resistant panel W is disposed between the transom 15 and the upper frame 11. Below, the configuration of the upper frame 11, lower frame 12, and vertical frames 13, 14 that make up the frame 10 of the unit curtain wall 1 will be mainly described in detail, along with an explanation of the features of the present invention.
[0012] As shown in Figures 3 and 15, the upper frame 11 has an upper frame main body 11a, a storage groove wall 11b, and a fireproof panel support portion 11c. The upper frame main body 11a is cylindrical with a roughly rectangular cross section. The storage groove wall 11b extends from the upper edge located on the exterior side of the upper frame main body 11a toward the exterior, then bends and extends downward, forming a panel storage groove 11d that opens to the inner periphery between the upper frame main body 11a and the upper frame main body 11a. The fireproof panel support portion 11c is cylindrical with a rectangular cross section that is smaller than the upper frame main body 11a, and protrudes from the upper edge located on the interior side of the upper frame main body 11a toward the interior side in the front-view direction.
[0013] Two upper groove components 11e, 11f are provided on the upper surface of the upper frame body 11a. The upper groove components 11e, 11f extend upward, approximately parallel, from the interior edge of the upper frame body 11a and from approximately the middle of the upper frame body 11a. Between them, they form an upper mating groove (first mating portion) 11g that opens upward. Although not shown in the figure, the exterior upper groove component 11e has drainage holes (not shown) at appropriate locations along its length. Furthermore, an upper exterior seal member (seal member) 11h is attached to the upper edge of the exterior upper groove component 11e, and an upper interior seal member (seal member) 11i is attached to the upper edge of the interior upper groove component 11f. The upper chamber outer seal member 11h and the upper chamber inner seal member 11i are arranged such that their sealing surfaces face each other and extend over the entire length of the upper frame 11 along its longitudinal direction.
[0014] As shown in Figures 3 and 16, the lower frame 12 has a lower frame main body 12a and a storage groove wall 12b. The lower frame main body 12a extends approximately horizontally along the projection direction. The dimension of the lower frame main body 12a along the projection direction is approximately equal to the combined dimension of the upper frame main body 11a and the fireproof panel support portion 11c of the upper frame 11. The storage groove wall 12b extends downward from the edge located on the exterior side of the lower frame main body 12a and then extends toward the exterior side. A ledge 12A is attached to the portion of the storage groove wall 12b that extends toward the exterior side. The ledge 12A extends in the projection direction from the underside of the portion of the storage groove wall 12b that extends toward the exterior side, and then the exterior edge bends and extends upward, forming a panel storage groove 12c that opens to the inner periphery between the storage groove wall 12b and the ledge 12b. The panel accommodating groove 12c of the lower frame 12 is provided in a portion between the vertical frames 13, 14 at a position opposite to the panel accommodating groove 11d of the upper frame 11.
[0015] The underside of the lower frame body 12a is provided with a lower mating protrusion (second mating portion) 12d and a lower outward protrusion 12e. The lower mating protrusion 12d is hollow and protrudes downward, and is located at a position corresponding to the upper mating groove 11g of the upper frame 11. The dimension of the lower mating protrusion 12d along the projection direction is set so that it can be fitted into the upper mating groove 11g, and the downward protrusion dimension of the lower mating protrusion 12d is set so that a gap can be secured between the lower mating protrusion 12d and the upper surface of the upper frame body 11a when the unit curtain walls 1 are installed side by side at a predetermined pitch. The lower outward protrusion 12e is hollow and protrudes downward further outside the room than the lower mating protrusion 12d, and is located at a position that ensures the insertion groove 12f between it and the lower mating protrusion 12d. The insertion groove 12f is configured so that its dimension along the projection direction allows for the insertion of the upper groove component 11e provided on the exterior side of the upper frame 11. The protrusion dimension of the lower outer protrusion 12e from the lower frame body 12a is slightly larger than the protrusion dimension of the lower fitting protrusion 12d. A lower seal member 12g is attached to the underside of the lower outer protrusion 12e, and is interposed between it and the unit curtain wall 1 installed in parallel below.
[0016] As shown in Figure 17, the vertical frame (hereinafter referred to as the right vertical frame 13) located on the right side when viewed from the outside of the room has a right frame main body 13a and a storage groove wall 13b. The right frame main body 13a extends almost vertically along the projection direction. The dimension of the right frame main body 13a along the projection direction is approximately equal to the combined dimension of the upper frame main body 11a and the fireproof panel support portion 11c of the upper frame 11. The storage groove wall 13b extends from the edge located on the outside of the right frame main body 13a toward the outer periphery and then extends toward the outside of the room. A ledge 13A is attached to the storage groove wall 13b. The ledge 13A extends in the projection direction from the outer periphery of the portion of the storage groove wall 13b extending toward the outside, and then its outer edge bends and extends inward, forming a panel storage groove 13c that opens toward the inner periphery between the ledge 13a and the storage groove wall 13b. The panel accommodating groove 13c of the right vertical frame 13 is provided over the entire longitudinal length so as to be continuous with the panel accommodating groove 11d of the upper frame 11 and the panel accommodating groove 12c of the lower frame 12.
[0017] Two right groove components 13d are provided on the outer peripheral side of the right frame main body 13a. The right groove components 13d extend parallel to each other toward the outer peripheral side from two positions that divide the right frame main body 13a into approximately thirds, and form a right fitting groove 13e between them that opens to the outer periphery. A right chamber outside seal member 13f is attached to the outer peripheral edge of the outside right groove component 13d, and a right chamber inside seal member 13g is attached to the outer peripheral edge of the inside right groove component 13d. The right chamber outside seal member 13f and the right chamber inside seal member 13g are arranged with their sealing surfaces facing each other and along the entire length of the right vertical frame 13. These right groove-forming portions 13d are sized so that the support fitting fins f2 provided on the support frame material F can be fitted therein, and so that the right chamber outer seal member 13f and the right chamber inner seal member 13g can each abut against the support fitting fins f2 without any gaps. As is clear from the figure, the right groove-forming portion 13d on the indoor side, together with the right outer peripheral wall portion 13h and the right inner wall portion 13i, form a hollow space between itself and the right frame main body portion 13a. The right groove-forming portion 13d on the indoor side, together with the right intermediate wall portion 13j and the portion of the storage groove-forming wall portion 13b extending in the viewing direction, form a hollow space between itself and the right frame main body portion 13a.
[0018] As shown in Figure 18, the vertical frame (hereafter referred to as the left vertical frame 14) located on the left side when viewed from the outside of the room has a left frame main body 14a and a storage groove wall 14b. The left frame main body 14a extends almost vertically along the projection direction. The dimension of the left frame main body 14a along the projection direction is approximately equal to the combined dimension of the upper frame main body 11a and the fireproof panel support portion 11c of the upper frame 11. The storage groove wall 14b extends from the edge located on the outside of the left frame main body 14a toward the outer periphery and then extends toward the outside of the room. A ledge 14A is attached to the storage groove wall 14b. The ledge 14A extends in the projection direction from the outer periphery of the portion of the storage groove wall 14b extending toward the outside, and then its outer edge bends and extends toward the outer periphery. This ledge 14A forms a panel storage groove 14c that opens toward the inner periphery between the storage groove wall 14b and the ledge 14b. The panel accommodating groove 14c of the left vertical frame 14 is provided over the entire longitudinal length so as to be continuous with the panel accommodating groove 11d of the upper frame 11 and the panel accommodating groove 12c of the lower frame 12.
[0019] Two left groove components 14d, 14e are provided on the outer periphery of the left frame body 14a. The left groove components 14d, 14e extend approximately parallel toward the outer periphery from a position closer to the interior than the middle of the left frame body 14a and a position closer to the exterior than the middle, respectively, and form a left fitting groove 14f between them that opens to the outer periphery. Each left groove component 14d, 14e has a weatherstripping material mounting groove 14g, 14h at the opposing portion of the outer periphery. The weatherstripping material mounting groove 14g, 14h is a groove-shaped portion that opens toward the outer periphery. The outdoor weatherstripping material mounting groove 14g is fitted with an outdoor weatherstripping material 14B, also known as a rain barrier, and the indoor weatherstripping material mounting groove 14h is fitted with an indoor weatherstripping material 14C, also known as a wind barrier.
[0020] The outdoor sealing material 14B is integrally formed with a flat base plate 14Ba, sealing fins 14Bb extending curvedly from both side edges of the base plate 14Ba, and an attachment portion 14Bc extending from the base plate 14Ba. The attachment portion 14Bc is attached to the sealing material attachment groove 14g and is disposed along the length of the left vertical frame 14. The indoor sealing material 14C has a main body 14Ca with a roughly triangular cross section and an attachment portion 14Cb extending from one corner of the main body 14Ca to the outer periphery. The attachment portion 14Cb is attached to the sealing material attachment groove 14h and is disposed along the length of the left vertical frame 14. The upper and lower ends of the indoor sealing material 14C are provided with insertion end members 14Cc with a rectangular cross section. The lower end faces of the outdoor-side tensioning material 14B and the indoor-side tensioning material 14C are flush with the lower end faces of the vertical frames 13, 14, while their upper end faces terminate below the upper end faces of the vertical frames 13, 14. The protruding dimensions of the outdoor-side tensioning material 14B and the indoor-side tensioning material 14C from the tensioning material mounting grooves 14g, 14h toward the outer periphery are approximately equal. As is clear from the figure, the indoor-side left groove-forming portion 14e, together with the left outer peripheral wall portion 14i and the left inner wall portion 14j, form a hollow portion between itself and the left frame main body portion 14a.
[0021] The upper frame 11, lower frame 12, and vertical frames 13, 14 constructed as described above are assembled around all four sides to form the frame body 10, as shown in Figures 1 to 14. Furthermore, the edges of the panel 20 are supported in the respective panel receiving grooves 11d, 12c, 13c, and 14c via sealing members 20a and 20b, thereby forming the unit curtain wall 1. More specifically, the upper frame 11 is attached between the upper ends of the vertical frames 13, 14 by threading a screw B into the end of the upper frame 11 through the vertical frames 13, 14. Similarly, the lower frame 12 is attached between the lower ends of the vertical frames 13, 14 by threading a screw B into the end of the lower frame 12 through the vertical frames 13, 14. As is clear from the figure, the lower ends of the left and right vertical frames 13, 14 are formed with a concave and convex shape to match the shapes of the lower fitting protrusion 12d, the lower outward protrusion 12e, and the insertion groove 12f, respectively. The insertion end member 14Cc attached to the lower end of the indoor-side fastening member 14C has its side surface (contact surface) 14Cd facing the indoor side of the lower fitting protrusion 12d located on the same plane as the surface facing the indoor side of the lower fitting protrusion 12d. The ends of the lower frame 12 are also configured to match the positions of the left frame body 14a of the left vertical frame 14 and the right frame body 13a of the right vertical frame 13. Meanwhile, the upper end faces of the left and right vertical frames 13, 14 extend almost horizontally at a position that matches the underside of the storage groove-forming wall 11b, so that the two upper groove-forming portions 11e, 11f and the upper fitting groove 11g on the upper frame 11 all protrude upward. Furthermore, the end of the upper frame 11 extends above the upper wall portions of the storage groove-forming wall portion 11b and the fire-resistant panel support portion 11c to a position where it covers the end faces of the vertical frames 13 and 14. When this unit curtain wall 1 is supported on a floor slab S and installed side by side, the lower fitting protrusion 12d fits between the two upper groove-forming portions 11e and 11f, and the upper room outer sealing member 11h and the upper room inner sealing member 11i attached to the upper groove-forming portions 11e and 11f each abut against the lower fitting protrusion 12d. This directly determines the relative positions of the upper and lower unit curtain walls 1 and forms a horizontal frame space SP1 between them that extends along the length of the upper frame 11 and lower frame 12 and is open at both ends.
[0022] The above-described unit curtain wall 1 is provided with a left catch pan (catch pan) 30 attached to the upper end of the left vertical frame 14, on the interior side of the room relative to the storage groove wall portion 14b. As shown in FIG. 19, the left catch pan 30 is a block-shaped piece molded from a water-stopping elastic material such as silicone sponge. The outer periphery of the left catch pan 30 is provided with a planar exterior wall abutment surface 30a extending substantially vertically. The outward projection of the left catch pan 30 from the left vertical frame 14 is approximately the same as the projection of the exterior-facing and interior-facing tension members 14B and 14C. This embodiment illustrates a left catch pan 30 integrally formed with a relatively wide lower portion (upper end restriction portion) 30A and a relatively narrow upper portion (lower end restriction portion) 30B.
[0023] The lower portion 30A has a dimension along the projection direction that is greater than the distance between the indoor side of the indoor-side tensioning material 14C and the outdoor side of the outdoor-side tensioning material 14B, and has tensioning material accommodation grooves (accommodation sections) 31a, 31b in the portions corresponding to the outdoor-side tensioning material 14B and the indoor-side tensioning material 14C, respectively. The tensioning material accommodation grooves 31a, 31b open on three sides of the lower portion 30A: the outer periphery, the inner periphery, and the bottom. The indoor-side tensioning material accommodation groove 31a is formed with a width that allows the insertion end member 14Cc of the indoor-side tensioning material 14C to fit into it. The outdoor-side tensioning material accommodation groove 31b is formed with a width that allows the upper end of the outdoor-side tensioning material 14B to be inserted into it.
[0024] The upper portion 30B protrudes upward from the indoor-side portion of the lower portion 30A above the upper end surface of the left vertical frame 14, and has an indoor-side protrusion 32a, an outdoor-side protrusion 32b, and a lid-like protrusion 32c. The indoor-side protrusion 32a and the outdoor-side protrusion 32b protrude upward and are provided at portions corresponding to the indoor-side upper groove component 11f and the outdoor-side upper groove component 11e provided on the upper frame 11. The indoor-side protrusion 32a and the outdoor-side protrusion 32b have sealing reference planes (reference planes) 32d, 32e provided at opposing portions. The sealing reference plane 32d of the indoor-side protrusion 32a is formed in a position that is flush with the surface of the lower fitting protrusion 12d that abuts the upper indoor-side seal member 11i of the upper groove component 11f. The seal reference plane 32e of the outdoor protrusion 32b is formed in a position flush with the surface of the lower fitting convex portion 12d against which the upper outdoor seal member 11h of the upper groove component 11e abuts. Cover protrusions 32f are provided on the inner peripheral surfaces of the indoor protrusion 32a and the outdoor protrusion 32b to cover the upper portions of the upper groove components 11e, 11f and the outer surfaces of the two upper groove components 11e, 11f. The lid-like protrusion 32c is a protrusion that can be inserted into the end of the horizontal frame space SP1. The upper surface 32g of the lid-like protrusion 32c is configured to abut against the insertion end member 14Cc of the unit curtain wall 1 arranged above. A communicating groove (communicating portion) 32h is provided between the lid-like protrusion 32c and the indoor protrusion 32a. The communicating groove 32h is a notch formed to open to the upper part of the horizontal frame space SP1. In the lower part 30A, a portion that is further outside the room than the outside-side protruding part 32b is provided with an inclined surface 32i that slopes gradually downward and inward toward the outside at a position below the upper surface 32g of the lid-shaped protrusion 32c. The height of the inclined surface 32i is set so as to ensure a gap between it and the lower end surface of the outside-side weatherstripping material 14B provided on the unit curtain wall 1 above.
[0025] The left catch pan 30, with an adhesive applied to its inner peripheral surface, is attached from the upper end of the left vertical frame 14 to a portion corresponding to the two upper groove components 11e, 11f provided on the upper frame 11 and the horizontal frame space SP1. Although not shown in the figure, a right catch pan 40 is provided at the upper end of the right vertical frame 13 of the unit curtain wall 1. The right catch pan 40 is provided to close the upper end of the gap formed between the two right groove components 13d. When unit curtain walls 1 are installed side by side, the right catch pan 40 fits into the lower ends of the two right groove components 13d provided on the upper right vertical frame 13, thereby closing the lower end of the gap between them and connecting this gap to the horizontal frame space SP1.
[0026] 1 to 6, the above-described unit curtain wall 1 is arranged vertically between the exterior wall panel P and the support frame member F, and the exterior wall panel P and the support frame member F are fitted with the exterior wall panel P and the interior wall panel F, respectively, and the exterior wall panel P is fitted with the interior wall panel F and the left catch pan 30. This abuts the exterior wall panel P's side surface p1, thereby forming a vertical frame space SP2 extending vertically between the left vertical frame 14, the exterior wall panel F and the interior wall panel F, the left catch pan 30, and the side surface p1 of the exterior wall panel P. Similarly, the support fitting fin f2 of the support frame member F is fitted into the right groove portion 13d of the right vertical frame 13, and the right catch pan 40 is abutted against the support frame body f1, thereby forming a vertical frame space SP3 extending vertically between the right vertical frame 13, the support frame member F, and the right catch pan 40. The left and right vertical frame spaces SP2 and SP3 are closed at their upper ends, while their lower ends are connected to the horizontal frame space SP1. Furthermore, the vertical frame space SP2 formed between the left vertical frame 14 and the exterior wall panel P is connected to the outdoor space through the gap between the lower end of the indoor-side sealant 14C and the left catch pan 30. Therefore, these vertical frame spaces SP2, SP3 and horizontal frame space SP1 are always at the same pressure as the outdoor space. In other words, an isobaric space equalizing the outdoor pressure is created around the four sides of the unit curtain wall 1, preventing outdoor water from infiltrating the indoor space. Furthermore, as mentioned above, for unit curtain walls 1 installed side by side, the lower fitting protrusion 12d fits between the two upper groove components 11e, 11f, directly determining their relative positions, preventing variations in watertightness regardless of the skill level of the worker. Furthermore, since there is no need to apply a wet sealant to the side surface p1 of the exterior wall panel P, subsequent maintenance is also easier.
[0027] In the above-described embodiment, the left catch pan 30 is illustrated as being integrally formed with the lower portion 30A, which abuts the upper end of the outdoor-side tension member 14B and the upper end of the indoor-side tension member 14C, and the upper portion 30B, which abuts the lower end of the indoor-side tension member 14C, and is attached to the upper end of the left vertical frame 14. However, the present invention is not limited to this. For example, a catch pan similar to that in the embodiment may be attached to the lower end of the left vertical frame 14, or a catch pan in which the lower and upper portions are molded separately may be used. Furthermore, the catch pan does not necessarily need to be provided with the indoor-side protrusion 32a or the outdoor-side protrusion 32b, and further, it is not necessary to provide the lid-shaped protrusion 32c or the tension member storage grooves 31a, 31b. In addition, in the above-described embodiment, an example is given of a curtain wall constructed between an exterior wall panel and a support frame material, but unit curtain walls arranged side by side on the left and right may also be arranged side by side above and below the exterior wall panel, or unit curtain walls may be arranged side by side above and below between the left and right exterior wall panels.
[0028] As described above, the curtain wall according to the present invention is a curtain wall in which unit curtain walls each having a frame body with upper and lower horizontal frames and left and right vertical frames are arranged one above the other with at least one of the vertical frames adjacent to the side surface of the exterior wall of a building, one of the horizontal frames having a first fitting portion extending along the length, and the other horizontal frame having a second fitting portion extending along the length and fitting into the first fitting portion of an adjacent unit curtain wall to form a horizontal frame space along the length of the horizontal frames between them, and the portion of the vertical frame facing the side surface of the exterior wall has a first fitting portion extending along the length of the horizontal frame and a second fitting portion extending along the length of the horizontal frame. The outdoor tight material and the indoor tight material are arranged along the top and bottom, respectively, and form a vertical frame space between them by abutting against the sides.The upper ends of the outdoor tight material and the upper ends of the indoor tight material are provided with upper end regulating portions that abut against them to block the vertical frame space, and lower end regulating portions are provided at the ends of the first fitting portion and the second fitting portion.The lower end of the indoor tight material abuts against the lower end regulating portion, while a gap reaching to the outside is secured between the lower end of the outdoor tight material and the lower end of the outdoor tight material, and the horizontal frame space is connected to the vertical frame space via the lower end regulating portion. According to this invention, a vertical frame space can be formed between the exterior and interior curtain walls by abutting them against the exterior wall surfaces. This vertical frame space is connected to the horizontal frame space and the exterior through the lower end restriction section. This creates a space with the same pressure as the exterior around the frame, preventing water from entering the interior. Furthermore, because the relative positions of the unit curtain walls are directly determined by the fitting sections, variations in watertightness can be prevented regardless of the skill level of the worker.
[0029] The present invention is also characterized in that, in the above-mentioned curtain wall, the lower end regulating portion is provided with an outdoor protruding portion that protrudes above the lower end of the outdoor tight material from a portion located between the outdoor tight material and the indoor tight material, and a communication portion is provided on the indoor side of the outdoor protruding portion that connects the horizontal frame space and the vertical frame gap. According to this invention, it is possible to prevent external water from directly entering the pressure chamber through the communication portion, thereby improving watertightness.
[0030] The present invention is also characterized in that, in the above-mentioned curtain wall, the lower end regulating portion is provided with an indoor-side protruding portion that protrudes above the lower end of the indoor-side tight material from a portion that is closer to the indoor side than the indoor-side tight material, and the indoor-side tight material is provided with an abutment surface that abuts against the indoor-side protruding portion. According to this invention, a contact surface is provided that contacts the lower end regulating portion while rising toward the indoor side more than the indoor side tight material, thereby more reliably preventing water from entering the indoor side.
[0031] The present invention is also characterized in that, in the above-mentioned curtain wall, the upper end regulating portion is provided with a storage portion for accommodating the upper end of the outdoor-side tight material and the upper end of the indoor-side tight material. According to this invention, the watertightness between the upper end regulating portion and the outdoor tight material and the indoor tight material can be improved.
[0032] The present invention is also characterized in that, in the above-mentioned curtain wall, a sealing member having opposing sealing surfaces on the indoor side and the outdoor side is provided between the first fitting portion and the second fitting portion, and the lower end regulating portion has a reference plane provided in a portion that is on the same plane as the sealing surface of the sealing member provided on the indoor side, and the abutment surface of the indoor side protrusion abuts against the reference plane. According to this invention, the indoor sealing surface that abuts when the first fitting portion and the second fitting portion are fitted and the reference plane of the lower end regulating portion that abuts the abutting surface of the indoor tight material are located on the same plane, which is advantageous in ensuring watertightness.
[0033] Furthermore, the present invention is characterized in that, in the above-mentioned curtain wall, the upper end regulating portion and the lower end regulating portion are integrally molded and provided at the upper end of the vertical frame. According to this invention, the number of parts to be handled is reduced, which is advantageous in terms of workability during assembly and manufacturing costs. [Explanation of symbols]
[0034] 1 unit curtain wall, 10 frame body, 11 upper frame, 11g upper fitting groove portion, 11h upper room exterior sealing member, 11i upper room interior sealing member, 12 lower frame, 12d lower fitting protrusion portion, 13 right vertical frame, 14 left vertical frame, 14B outdoor sealing material, 14C indoor sealing material, 14Cd side surface, 30 left catch pan, 30A lower portion, 30B upper portion, 31a, 31b sealing material accommodation groove, 32a indoor interior protrusion portion, 32b outdoor exterior protrusion portion, 32d, 32e sealing reference plane, 32h communicating groove portion, P exterior wall panel, p1 side surface, SP1 horizontal frame space SP2, SP3 vertical frame space
Claims
1. A unit curtain wall is a curtain wall in which a frame body having upper and lower horizontal frames and left and right vertical frames is arranged side by side with at least one of the vertical frames adjacent to the outer wall side of a building, One of the horizontal frames is provided with a first fitting portion extending along the longitudinal direction, The other horizontal frame is provided with a second fitting portion that extends along the length and fits into the first fitting portion of the adjacent unit curtain wall to form a horizontal frame space along the length of the horizontal frame between them, In the portion of the vertical frame facing the outer wall side surface, an outdoor tight material and an indoor tight material that form a vertical frame space between them by abutting against the outer wall side surface are provided along the top and bottom, The upper end of the outdoor tight material and the upper end of the indoor tight material are provided with upper end restriction portions that abut against each other to close the vertical frame space, a lower end restriction portion is provided at each end of the first fitting portion and the second fitting portion; The lower end of the indoor-side tight material abuts against the lower end regulating portion, while a gap leading to the outside of the room is secured between the lower end of the outdoor-side tight material and the lower end of the indoor-side tight material, A curtain wall characterized in that the horizontal frame space is connected to the vertical frame space via the lower end restriction portion.
2. The curtain wall described in claim 1, characterized in that the lower end regulating portion is provided with an outdoor protruding portion that protrudes above the lower end of the outdoor tight material from a portion located between the outdoor tight material and the indoor tight material, and a communication portion that connects the horizontal frame space and the vertical frame space is provided indoors more than the outdoor protruding portion.
3. The lower end regulating portion is provided with an indoor protruding portion that protrudes upward from a portion that is indoors more than the indoor-side tight material and above the lower end of the indoor-side tight material, 2. The curtain wall according to claim 1, wherein the indoor-side tight material has an abutment surface that abuts against the indoor-side protrusion.
4. The curtain wall according to claim 1, characterized in that the upper end regulating portion is provided with a storage portion for storing the upper end of the outdoor-side tight material and the upper end of the indoor-side tight material.
5. A seal member having sealing surfaces facing each other on a portion that becomes the indoor side and a portion that becomes the outdoor side is provided between the first fitting portion and the second fitting portion, The curtain wall described in claim 3, characterized in that the lower end regulating portion has a reference plane in a portion that is on the same plane as the sealing surface of the sealing member provided on the inside of the room, and the abutment surface of the indoor side protruding portion abuts against the reference plane.
6. The curtain wall according to claim 1, characterized in that the upper end regulating portion and the lower end regulating portion are integrally molded and provided at the upper end of the vertical frame.
Citation Information
Patent Citations
Watertight construction for unit type curtain wall
JP1995180246A
Curtain wall unit
JP2021095748A