Curtain wall unit

Abstract

To efficiently ventilate right and left air layers without complicating a ventilation structure of the right and left air layers in a curtain wall unit having the air layers partitioned to the right and left by a middle frame.SOLUTION: The curtain wall unit 2 includes a frame body 3 having an upper frame, a lower frame, right and left vertical frames, and a middle frame 7, an outdoor side panel 2A and an indoor side panel 2C held by the frame body 3, and right and left air layers 8 formed between the outdoor side panel 2A and the indoor side panel 2C and partitioned by the middle frame 7. The frame body 3 has an air supply port for communicating each of the right and left air layers 8 with the outdoor space 13. The center frame 7 has a communication port 7D for communicating each of the right and left air layers 8 with an inner space 7E of the center frame 7, and an exhaust port 7D for communicating the inner space 7F with the outdoor space 13.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a curtain wall unit having left and right air spaces separated by a central rib. [Background technology]

[0002] In a curtain wall unit with a rib and an air space, the rib is located between the left and right vertical frames and is erected on the upper and lower frames. The air space is formed between the outdoor panel and the indoor panel, and is divided into left and right spaces by the rib. Ventilation of the left and right air spaces improves the thermal environment around windows in a building. Conventionally, a curtain wall unit has been known that includes left and right intermediate air spaces, a lower ventilation opening provided at the bottom of the right intermediate air space, an upper ventilation opening provided at the top of the left intermediate air space, and vertical ribs that separate the left and right intermediate air spaces (see Patent Document 1).

[0003] In the conventional curtain wall unit described in Patent Document 1, air flows from the outside of the curtain wall unit through the lower ventilation opening into the right intermediate air layer, then through the left and right ventilation openings in the vertical frame into the left intermediate air layer, and is released to the outside through the upper ventilation opening. In this way, air flows from the outside through the right and left intermediate air layers to the outside, efficiently ventilating the left and right intermediate air layers. However, conventional curtain wall units tend to have a long ventilation path from the lower ventilation opening to the upper ventilation opening. Furthermore, because the lower ventilation opening is provided only at the bottom of the right intermediate air layer, the lower frame hole in the lower frame must be blocked with a panel at the bottom of the left intermediate air layer. Because the upper ventilation opening is provided only at the top of the left intermediate air layer, the upper frame hole in the upper frame must be blocked with a panel at the top of the right intermediate air layer. This can lead to a complex ventilation structure for the left and right intermediate air layers. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6662717 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in consideration of the above-mentioned conventional problems, and its purpose is to efficiently ventilate the left and right air layers in a curtain wall unit having an air layer separated into left and right by a central rib, without complicating the ventilation structure of the left and right air layers. [Means for solving the problem]

[0006] The present invention provides A curtain wall unit comprising: a frame body having an upper frame, a lower frame, left and right vertical frames, and a rib; an outdoor panel and an indoor panel held by the frame body; and left and right air spaces formed between the outdoor panel and the indoor panel and partitioned by the rib, The frame body has air intake ports that communicate each of the left and right air layers with an outdoor space, The central rib is a curtain wall unit having communication ports that connect each of the left and right air layers to the inner space of the central rib, and an exhaust port that connects the inner space to the outdoor space. [Effects of the Invention]

[0007] According to the present invention, in a curtain wall unit having an air layer separated into left and right by a central rib, the left and right air layers can be efficiently ventilated without complicating the ventilation structure of the left and right air layers. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a front view showing the curtain wall of the first embodiment. [Figure 2] FIG. 2 is a cross-sectional view showing the curtain wall of the first embodiment. [Figure 3] FIG. 2 is a vertical cross-sectional view showing the curtain wall of the first embodiment. [Figure 4] FIG. 2 is a front view showing the curtain wall unit of the first embodiment. [Figure 5] FIG. 2 is a cross-sectional view showing the curtain wall unit of the first embodiment. [Figure 6] FIG. 2 is a cross-sectional view showing the adjacent portions of two curtain wall units on the left and right sides of the first embodiment. [Figure 7] FIG. 2 is a vertical cross-sectional view showing the adjacent portions of two upper and lower curtain wall units of the first embodiment. [Figure 8] FIG. 2 is a cross-sectional view showing a portion including a central rib of the curtain wall unit of the first embodiment. [Figure 9] FIG. 9 is a vertical cross-sectional view showing a central frame of the curtain wall unit of the first embodiment taken along line XX in FIG. 8. [Figure 10] FIG. 10 is a cross-sectional view showing a portion including a central rib of a curtain wall unit according to a second embodiment. [Figure 11] FIG. 10 is a cross-sectional view showing a portion including a central rib of a curtain wall unit according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the curtain wall unit of the present invention will be described with reference to the drawings. The curtain wall unit of this embodiment is used in the curtain wall of a building and is installed on the exterior wall of the building. Multiple curtain wall units are combined with each other to form a part of the curtain wall. The curtain wall unit and curtain wall are installed on the exterior wall of the building, between the indoor (indoor) and outdoor (outdoor) sides of the building, to form the exterior wall of the building. Several embodiments of the curtain wall unit will be described below in order.

[0010] (First embodiment) Fig. 1 is a front view showing the curtain wall 1 of the first embodiment, showing the curtain wall 1 and curtain wall unit 2 installed in a building 10 as viewed from the outdoor side. Fig. 2 is a cross-sectional view showing the curtain wall 1 of the first embodiment, showing the curtain wall 1 cut along a plane including the left-right direction S and the indoor-outdoor direction T. Fig. 3 is a longitudinal cross-sectional view showing the curtain wall 1 of the first embodiment, showing the curtain wall 1 and a part of the building 10 cut along a plane including the up-down direction R and the indoor-outdoor direction T.

[0011] When the curtain wall 1 and the curtain wall unit 2 installed in the building 10 are viewed from the front, the up-down direction is the up-down direction R, and the left-right direction is the left-right direction S. In FIG. 1, the up-down direction R is the vertical direction, and the left-right direction S is the horizontal direction. The indoor-outdoor direction T is the indoor-outdoor direction (indoor-outdoor direction) of the curtain wall 1 and the curtain wall unit 2 installed in the building 10. Furthermore, the indoor-outdoor direction T is the front-to-back direction (depth direction) and the thickness direction of the curtain wall 1 and the curtain wall unit 2 when viewed from the front of the curtain wall 1 and the curtain wall unit 2 installed in the building 10, and in FIG. 2 is the horizontal direction perpendicular to the left-to-right direction S. Thus, the directions of the curtain wall 1 and the curtain wall unit 2 are specified by the directions when they are installed in the building 10. Furthermore, the indoor side and the outdoor side of the curtain wall 1 and the curtain wall unit 2 are the indoor side and the outdoor side when they are installed in the building 10.

[0012] As shown in the figure, the curtain wall 1 comprises a plurality of curtain wall units 2 installed side by side on a building 10. The curtain wall units 2 are panel units that make up the curtain wall 1, and are pre-assembled before installation on the building 10. The curtain wall 1 and the curtain wall units 2 are installed in locations on the exterior wall 11 of the building 10, and form the exterior wall 11 of the building 10. The curtain wall units 2 are installed side by side in the vertical direction R and the horizontal direction S, and are connected to each other with adjacent curtain wall units 2. The curtain wall 1 and the curtain wall units 2 are arranged on the outdoor side of the skeleton 12 of the building 10, and are attached to the skeleton 12 of the building 10.

[0013] Fig. 4 is a front view showing the curtain wall unit 2 of the first embodiment, showing one curtain wall unit 2 extracted from the curtain wall 1 shown in Fig. 1. Fig. 5 is a cross-sectional view showing the curtain wall unit 2 of the first embodiment, showing one curtain wall unit 2 extracted from the curtain wall 1 shown in Fig. 2.

[0014] As shown in Figures 3 to 5, the curtain wall unit 2 includes panels 2A, 2B, and 2C (outdoor-side panel 2A and indoor-side panels 2B and 2C) and a frame body 3 that surrounds the panels 2A, 2B, and 2C. The panels 2A, 2B, and 2C are placed in a square opening 3A of the frame body 3 and are held by the frame body 3, closing the opening 3A of the frame body 3. The frame body 3 is a square opening frame that forms the opening 3A, and is placed on the outdoor side of the skeleton 12 of the building 10 and attached to the skeleton 12 of the building 10. The frame bodies 3 of the multiple curtain wall units 2 are each connected to the frame bodies 3 of adjacent curtain wall units 2.

[0015] The frame body 3 has four interlocking frames 4-6 (an upper frame 4, a lower frame 5, and a pair of vertical frames 6) and a backbone 7, and the frames 4-6 and backbone 7 form a rectangular opening 3A on the left and right. The frames 4-6 and backbone 7 of the frame body 3 are frame materials (frame components) that make up the frame body 3, and are each made of a metal (for example, aluminum alloy) shaped member formed by extrusion molding. The longitudinal direction of each of the upper frame 4 and the lower frame 5 is the left-right direction S, and the longitudinal direction of each of the vertical frames 6 and backbone 7 is the up-down direction R.

[0016] The upper and lower frames 4 and 5 are upper and lower horizontal frames (upper horizontal frame and lower horizontal frame) located at the top and bottom of the frame body 3, extending horizontally (left-right direction S). The pair of vertical frames 6 are side frames located on the left and right sides of the frame body 3, extending vertically (up-down direction R). The back rib 7 is a vertical central rib extending vertically and positioned between the left and right vertical frames 6, spaced apart from each other. The ends of the upper frame 4, lower frame 5, and left and right vertical frames 6 are connected to each other, and the ends of the back rib 7 are connected to the upper frame 4 and lower frame 5, thereby framing the frames 4 to 6 and the back rib 7. The back rib 7 is installed between the upper frame 4 and lower frame 5 and divides the inside of the frame body 3 (opening 3A) into left and right sections. The panels 2A, 2B, and 2C are held by the frames 4 to 6 and the back rib 7 of the frame body 3 and attached to the frame body 3.

[0017] The curtain wall unit 2 is a double-skin curtain wall unit having a double-skin structure. The outdoor-side panel 2A is an outer skin (outer panel) arranged on the outdoor side at the opening 3A of the frame body 3, and the indoor-side panels 2B, 2C (first indoor-side panel 2B, second indoor-side panel 2C) are inner skins (inner panels) arranged on the indoor side at the opening 3A of the frame body 3. The outdoor-side panel 2A is provided across the entire opening 3A of the frame body 3 and is arranged on the outdoor side of the indoor-side panels 2B, 2C. The first indoor-side panel 2B is an upper-side panel located above the second indoor-side panel 2C, and the second indoor-side panel 2C is a lower-side panel located below the first indoor-side panel 2B.

[0018] The indoor-side panels 2B, 2C are adjacent to each other in the vertical direction R and are disposed on the indoor side of the outdoor-side panel 2A. The outdoor-side panel 2A and the first indoor-side panel 2B are fixed panels and are fixed to the opening 3A of the frame 3. The outdoor-side panel 2A is a glass panel (for example, double-glazed glass, laminated glass, or plate glass), and the first indoor-side panel 2B is a non-glass panel (for example, a fire-resistant panel). The second indoor-side panel 2C is an openable / closable panel having a glass panel that is openably connected to the frame 3 and opens toward the indoor side.

[0019] The outdoor panel 2A and the indoor panels 2B, 2C are located on both the left and right sides of the backbone 7 (on both sides in the left-right direction S of the backbone 7). The left and right outdoor panels 2A are located on one side and the other side of the backbone 7 in the left-right direction S, with the backbone 7 sandwiched between them. The left and right indoor panels 2B, 2C are located on one side and the other side of the backbone 7 in the left-right direction S, with the backbone 7 sandwiched between them. The backbone 7 is arranged between the left and right outdoor panels 2A and between the left and right indoor panels 2B, 2C in the left-right direction S, and holds the left and right outdoor panels 2A and the left and right indoor panels 2B, 2C together.

[0020] The curtain wall unit 2 has left and right air spaces 8 formed between the outdoor panel 2A and the indoor panels 2B, 2C and separated by a rib 7. The air spaces 8 are air in spaces (voids) formed inside the frame body 3, and are located on both the left and right sides of the rib 7. The rib 7 is located between the left and right air spaces 8 and separates the left and right air spaces 8 in the left-right direction S. The air spaces 8 are separated left and right by the rib 7 and are formed on both the left and right sides of the rib 7, with the rib 7 sandwiched between them. In the left-right direction S, the air spaces 8 are formed between one of the left and right vertical frames 6 and the rib 7, and between the other of the left and right vertical frames 6 and the rib 7.

[0021] The outdoor panel 2A and the indoor panels 2B, 2C are disposed apart from each other in the indoor-outdoor direction T, facing each other with an air layer 8 between them. The air layer 8 is located on the indoor side of the outdoor panel 2A and on the outdoor side of the indoor panels 2B, 2C, and is surrounded by the frame body 3 (upper frame 4, lower frame 5, vertical frame 6, and central rib 7), forming an opening 3A in the frame body 3. The outdoor panel 2A is located on the outdoor side of the air layer 8, and the indoor panels 2B, 2C are located on the indoor side of the air layer 8. The outdoor panel 2A is disposed between the air layer 8 and the outdoor space 13, and is exposed to the outside air of the outdoor space 13. The outdoor space 13 is a space outside the building 10 and the curtain wall unit 2, and the outside air is the air in the outdoor space 13.

[0022] FIG. 6 is a cross-sectional view showing the mutually adjacent portions of two left and right curtain wall units 2 of the first embodiment, showing the portions of the left and right curtain wall units 2 on the vertical frame 6 side. As shown in the figure, the curtain wall unit 2 and the frame body 3 are installed side by side in the left-right direction S on the exterior wall 11 of the building 10. The left and right curtain wall units 2 and frame bodies 3 installed side by side in the left-right direction S are adjacent to each other in the left-right direction S.

[0023] The vertical frame 6 has a panel holding portion 6A that holds the outdoor panel 2A. The panel holding portion 6A is a groove that extends in the longitudinal direction of the vertical frame 6 and is open toward the outdoor panel 2A. The outdoor panel 2A (the vertical edge portion of the outdoor panel 2A) is housed inside the recessed panel holding portion 6A and is held inside the panel holding portion 6A. When the curtain wall units 2 are installed side by side on the building 10 (exterior wall 11), the panel holding portions 6A of the vertical frames 6 of the left and right curtain wall units 2 that are adjacent in the left-right direction S are arranged apart in the left-right direction S, forming a joint space M1 between them. The joint space M1 is a gap (joint) space located between the left and right panel holding portions 6A and is open toward the outdoor space 13.

[0024] Figure 7 is a vertical cross-sectional view showing the adjacent areas of two upper and lower curtain wall units 2 in the first embodiment, showing the portion of the upper curtain wall unit 2 on the lower frame 5 side and the portion of the lower curtain wall unit 2 on the upper frame 4 side. As shown in the figure, the curtain wall unit 2 and the frame body 3 are installed side by side in the vertical direction R on the exterior wall 11 of the building 10. The upper and lower curtain wall units 2 and frame bodies 3 installed side by side in the vertical direction R are adjacent to each other in the vertical direction R.

[0025] The upper frame 4 and the lower frame 5 have panel holding portions 4A, 5A that hold the outdoor panel 2A. The panel holding portions 4A, 5A are grooves that extend in the longitudinal direction of the upper frame 4 and the lower frame 5, respectively, and are open toward the outdoor panel 2A. The outdoor panel 2A (the upper and lower edges of the outdoor panel 2A) is housed inside the recessed panel holding portions 4A, 5A and is held inside the panel holding portions 4A, 5A. When the curtain wall units 2 are installed side by side on the building 10 (exterior wall 11), the panel holding portion 5A of the lower frame 5 of the upper curtain wall unit 2 and the panel holding portion 4A of the upper frame 4 of the lower curtain wall unit 2 that are adjacent in the vertical direction R are spaced apart in the vertical direction R, forming a joint space M2 between them. The joint space M2 is a gap (joint) space located between the upper and lower panel holding portions 4A, 5A and is open toward the outdoor space 13.

[0026] The frame body 3 has air intake ports 2D that connect each of the left and right air layers 8 to the outdoor space 13. The air intake ports 2D are openings for supplying air from the outdoor space 13 to each of the left and right air layers 8, and are located between the outdoor space 13 and the air layer 8, opening toward each of the outdoor space 13 and the air layer 8. The left and right air layers 8 are connected to the outdoor space 13 via the air intake ports 2D, respectively, and air from the outdoor space 13 (outside air) is supplied to them. Here, the air intake ports 2D are air supply holes formed in the lower frame 5, penetrating the lower frame 5 in the up-down direction R and opening toward the space below the lower frame 5 and the air layer 8 above the lower frame 5. The air intake ports 2D are located on the indoor side of the joint space M2, and connect the outdoor space 13 to the air layer 8 via the joint space M2.

[0027] Air intake port 2D is a vent that allows air to pass through, and is located below (here, on the lower side) each of the left and right air layers 8, supplying air from below toward the upper air layer 8. Air is supplied from outdoor space 13 to each of the left and right air layers 8 through air intake port 2D, and is supplied to the left and right air layers 8. When the air in air layer 8 is warmed by sunlight, outside air temperature, etc. and the air temperature rises, the density of the air in air layer 8 becomes smaller than the density of the outside air, and the air rises within air layer 8. This causes the air to move upward within air layer 8.

[0028] FIG. 8 is a cross-sectional view showing a portion including a rib 7 of the curtain wall unit 2 of the first embodiment, showing the rib 7 located between the left and right air layers 8. As shown in the figure, the rib 7 has left and right panel holding portions 7A that hold the left and right outdoor panels 2A located on the left and right sides of the rib 7, a cover 7B located on the outdoor side of the panel holding portions 7A, a hollow portion 7C facing the left and right air layers 8, an inner space 7D which is a void portion, communication ports 7E that connect each of the left and right air layers 8 to the inner space 7D of the rib 7, and an exhaust port 7F that connects the inner space 7D of the rib 7 to the outdoor space 13.

[0029] The left and right panel holding portions 7A of the rib 7 are grooves extending in the longitudinal direction of the rib 7, and are open toward the left and right outdoor panels 2A, respectively. The outdoor panel 2A (the vertical edge portion of the outdoor panel 2A) is accommodated inside the concave panel holding portions 7A and is held inside the panel holding portions 7A. The left and right panel holding portions 7A of the rib 7 are spaced apart in the left-right direction S, forming a joint space M3 between them. The joint space M3 is a gap (joint) space located between the left and right panel holding portions 7A and is open toward the outdoor space 13. The joint space M3 is located on the outdoor side of the hollow portion 7C, inner space 7D, and exhaust port 7F of the rib 7, and is located between the hollow portion 7C, inner space 7D, and exhaust port 7F and the outdoor space 13.

[0030] The cover 7B is attached to one of the left and right panel holding portions 7A and is located on the outdoor side of the left and right panel holding portions 7A. The cover 7B extends outdoors from one panel holding portion 7A and is positioned from the outdoor side of one panel holding portion 7A to the outdoor side of the other panel holding portion 7A, separating the joint space M3 and the other panel holding portion 7A from the outdoor side. The cover 7B is located on the outdoor side of the joint space M3 and covers the joint space M3 on the outdoor side. When the rib 7 is viewed from the outdoor side in the indoor-outdoor direction T, the joint space M3 is shielded by the cover 7B.

[0031] The hollow portion 7C is a hollow portion of the rib 7 and includes a wall portion surrounding the space inside the hollow portion 7C. The inner space 7D of the rib 7 is a space located inside the rib 7, and in this case, it is the space inside the hollow portion 7C. The hollow portion 7C and the inner space 7D are located on the indoor side of the left and right panel holding portions 7A and the joint space M3, and are located between the left and right air layers 8 of the rib 7, extending in the longitudinal direction of the rib 7. The communication opening 7E and the exhaust opening 7F are vents that allow air to pass through, and are provided in the hollow portion 7C of the rib 7. The communication opening 7E connects the upper portions of the left and right air layers 8 to the upper portion of the inner space 7D of the rib 7, and the exhaust opening 7F connects the upper portion of the inner space 7D of the rib 7 to the outdoor space 13.

[0032] The communication ports 7E are openings for discharging air from the left and right air layers 8 to the inner space 7D of the backbone 7, and are provided on both the left and right sides of the hollow portion 7C and the backbone 7. The communication ports 7E are located between the left and right air layers 8 and the inner space 7D of the backbone 7, respectively, and are open toward the air layers 8 and the inner space 7D. The left and right air layers 8 communicate with the inner space 7D of the backbone 7 through the communication ports 7E, respectively, and discharge air into the inner space 7D. Here, the left and right communication ports 7E are communication holes formed in the hollow portion 7C and the left and right side surfaces 7G of the backbone 7, penetrate the side surfaces 7G in the left-right direction S, and open toward the inner space 7D between the air layers 8 on the sides of the hollow portion 7C and the backbone 7 and the left and right side surfaces 7G. The side portions 7G are the side portions on both sides of the hollow portion 7C and the backbone 7 in the left-right direction S, and are arranged facing the sides of the hollow portion 7C and the backbone 7, and are located between each of the left and right air layers 8 and the inner space 7D of the backbone 7.

[0033] The exhaust port 7F is an opening for exhausting air from the inner space 7D of the back rib 7 toward the outdoor space 13 and is provided on the outdoor side of the inner space 7D of the back rib 7. The exhaust port 7F is located between the inner space 7D of the back rib 7 and the outdoor space 13 and is open toward both the inner space 7D and the outdoor space 13. The inner space 7D of the back rib 7 is connected to the outdoor space 13 via the exhaust port 7F and exhausts air toward the outdoor space 13. Here, the exhaust port 7F is an exhaust hole formed in the hollow portion 7C and the outdoor surface portion 7H of the back rib 7, penetrates the outdoor surface portion 7H in the indoor-outdoor direction T, and is open toward the inner space 7D on the indoor side of the outdoor surface portion 7H and the outdoor space 13 on the outdoor side of the outdoor surface portion 7H. The outdoor surface portion 7H is the outdoor surface portion of the hollow portion 7C and the back rib 7 in the indoor-outdoor direction T, is positioned toward the outdoor side of the hollow portion 7C and the back rib 7, and is located between the inner space 7D and the outdoor space 13.

[0034] The air in the left and right air layers 8 of the backbone 7 is discharged into the inner space 7D of the backbone 7 through the left and right communication ports 7E, respectively, and flows into the inner space 7D. This causes the left and right air layers 8 to be exhausted into the common inner space 7D. The exhaust port 7F exhausts air from the inner space 7D on the indoor side toward the outdoor space 13 on the outdoor side. The exhaust port 7F discharges the air in the inner space 7D toward the outdoor space 13, and the air is exhausted from the inner space 7D toward the outdoor space 13. The left and right air layers 8 are connected to the outdoor space 13 through the communication ports 7E, the inner space 7D, and the exhaust port 7F, respectively, and the air in the left and right air layers 8 is exhausted toward the outdoor space 13 through the communication ports 7E, the inner space 7D, and the exhaust port 7F, respectively. This causes the left and right air layers 8 to be ventilated.

[0035] The outdoor surface portion 7H of the rib 7 and the exhaust vent 7F are located on the indoor side of the joint space M3 between the left and right panel holding portions 7A of the rib 7, and are also located between the inner space 7D of the rib 7 and the joint space M3, facing the inner space 7D and the joint space M3. The exhaust vent 7F is open toward both the inner space 7D and the joint space M3. The exhaust vent 7F connects the inner space 7D to the joint space M3, and connects the inner space 7D to the outdoor space 13 via the joint space M3. The exhaust vent 7F exhausts air from the inner space 7D to the outdoor space 13 via the joint space M3.

[0036] Figure 9 is a vertical cross-sectional view showing the rib 7 of the curtain wall unit 2 of the first embodiment taken along line XX in Figure 8, and schematically shows the portion of the rib 7 including the communication port 7E and exhaust port 7F. As shown in the figure, the backbone 7 has a plurality of left and right communication openings 7E spaced apart in the up-down direction R, and a plurality of exhaust openings 7F spaced apart in the up-down direction R. The communication openings 7E are formed on both the left and right sides (side surface portions 7G) of the backbone 7 at intervals in the up-down direction R, and the left and right communication openings 7E face each other in the left-right direction S, with an inner space 7D of the backbone 7 sandwiched between them. The exhaust openings 7F are formed on the outdoor surface portion 7H of the backbone 7 at intervals in the up-down direction R, and are located between adjacent communication openings 7E in the up-down direction R. In this way, the positions of the communication openings 7E and the positions of the exhaust openings 7F in the up-down direction R are different from each other, and the communication openings 7E and the exhaust openings 7F are positioned offset from each other in the up-down direction R.

[0037] In the curtain wall unit 2 of the first embodiment described above, the left and right air layers 8 of the ribs 7 are ventilated via the communication openings 7E, the inner space 7D, and the exhaust openings 7F of the ribs 7, respectively, allowing for efficient ventilation of the left and right air layers 8 without complicating the ventilation structure of the left and right air layers 8. Furthermore, similar to the joint space M1 between the panel holding portions 6A of the vertical frames 6 of curtain wall units 2 adjacent in the left-right direction S, a joint space M3 is formed between the left and right panel holding portions 7A of the ribs 7, allowing the appearance of the vertical frames 6 and the ribs 7 to be consistent. This improves the design of the curtain wall unit 2.

[0038] The inner space 7D of the rib 7 is located inside the hollow portion 7C, making it difficult for water such as rainwater to enter the inner space 7D of the rib 7 from the outdoor space 13 via the exhaust port 7F, thereby preventing water from entering the air layer 8. By shifting the communication port 7E of the rib 7 and the exhaust port 7F in the vertical direction R, it is also possible to prevent water from entering the communication port 7E from the exhaust port 7F, preventing water from entering the air layer 8. By positioning the exhaust port 7F on the indoor side of the joint space M3, it is also possible to prevent water from entering the exhaust port 7F.

[0039] The air intake port for supplying air to the air layer 8 is not limited to the air intake port 2D provided in the lower frame 5, but may be provided in a portion of the frame body 3 other than the lower frame 5 (for example, the left and right vertical frames 6 or the middle rib 7). The air intake port 2D, the communication port 7E, and the exhaust port 7F are not limited to holes, but may be other types of openings (for example, slits, notches, or gaps). A partition wall may be provided inside the middle rib 7 to define multiple hollow sections (two in FIG. 8) within the middle rib 7. In this case, one of the multiple hollow sections defined within the middle rib 7 constitutes the hollow portion 7C of the middle rib 7. Alternatively, a partition wall may not be provided inside the middle rib 7, but a single hollow section may be formed within the middle rib 7. In this case, the single hollow section formed within the middle rib 7 constitutes the hollow portion 7C of the middle rib 7. The present invention can be applied to various curtain wall units in which the middle ribs 7 define the left and right air layers 8.

[0040] Next, a curtain wall unit 2 of another embodiment will be described. In the curtain wall unit 2 of the other embodiment, explanation of the same matters as in the curtain wall unit 2 of the first embodiment will be omitted, and the differences from the curtain wall unit 2 of the first embodiment will be mainly described. Furthermore, with regard to the curtain wall unit 2 of the other embodiment, the same names and symbols as the configuration of the curtain wall unit 2 of the first embodiment will be used for the configurations that correspond to the configuration of the curtain wall unit 2 of the first embodiment.

[0041] (Second embodiment) FIG. 10 is a cross-sectional view showing a portion including a rib 7 of a curtain wall unit 2 of the second embodiment, and shows the rib 7 located between the left and right air layers 8, similar to FIG. As shown in the figure, in the curtain wall unit 2 of the second embodiment, the ribs 7 are split ribs divided into left and right halves, unlike the ribs 7 of the first embodiment. The ribs 7 have a first aggregate 20 facing one of the air spaces 8 on the left and right of the ribs 7, and a second aggregate 30 connected to the first aggregate 20 and facing the other of the air spaces 8 on the left and right of the ribs 7.

[0042] The aggregates 20, 30 (first aggregate 20, second aggregate 30) are core components that make up the core rib 7, and each has an outdoor-side connection portion 21, 31 and an indoor-side connection portion 22, 32. The outdoor-side connection portions 21, 31 of the aggregates 20, 30 are overlapped and fixedly connected to each other. The indoor-side connection portions 22, 32 of the aggregates 20, 30 are overlapped and fixedly connected to each other. The aggregates 20, 30 are connected to each other by the outdoor-side connection portions 21, 31 and the indoor-side connection portions 22, 32, respectively.

[0043] The hollow portion 7C of the central rib 7 is formed into a hollow shape by the first aggregate 20 and the second aggregate 30. The inner space 7D of the central rib 7 is surrounded by the first aggregate 20 and the second aggregate 30 and is formed between the first aggregate 20 and the second aggregate 30. The left and right panel holding portions 7A are provided on one of the first aggregate 20 of the two aggregates 20, 30, and the cover 7B is attached to one of the left and right panel holding portions 7A of the first aggregate 20. The communication port 7E and the side portion 7G are provided in each of the first aggregate 20 and the second aggregate 30, and the exhaust port 7F and the outdoor surface portion 7H are provided in one of the first aggregate 20 of the two aggregates 20, 30. The communication port 7E of the first aggregate 20 connects one of the left and right air layers 8 of the backbone 7 to the inner space 7D, and the communication port 7E of the second aggregate 30 connects the other of the left and right air layers 8 of the backbone 7 to the inner space 7D.

[0044] In the curtain wall unit 2 of the second embodiment, with the first aggregate 20 and the second aggregate 30 of the central rib 7 separated, other components (for example, rivets) can be easily attached to each of the first aggregate 20 and the second aggregate 30. In this state, the central rib 7 is formed by connecting the first aggregate 20 and the second aggregate 30. This makes it easier to attach other components to each of the first aggregate 20 and the second aggregate 30 of the central rib 7, thereby improving the workability of the curtain wall unit 2.

[0045] (Third embodiment) FIG. 11 is a cross-sectional view showing a portion including a rib 7 of a curtain wall unit 2 of the third embodiment, and shows the rib 7 located between the left and right air layers 8, similar to FIG. As shown in the figures, in the curtain wall unit 2 of the third embodiment, the ribs 7 differ from the ribs 7 of the first embodiment in that they have a main body material 40 and a blocking material 50. The main body material 40 is the main material that constitutes the main body of the ribs 7, and faces the left and right air spaces 8 of the ribs 7, dividing them into left and right air spaces 8. The main body material 40 also forms an inner space 7D of the ribs 7.

[0046] The left and right panel holding portions 7A, the left and right communication openings 7E, and the left and right side portions 7G are provided in the main body material 40, and the exhaust opening 7F is provided in the blocking material 50. The main body material 40 has an opening 41 that opens the inner space 7D of the rib 7 toward the outdoor space 13. The opening 41 is an opening that extends in the longitudinal direction (up-down direction R) of the rib 7 and the main body material 40, is located between the left and right panel holding portions 7A, and is open toward the inner space 7D of the rib 7 and the outdoor space 13. In this example, the opening 41 is a joint space M3 between the left and right panel holding portions 7A, and is provided over the entire longitudinal direction of the ribs 7 and the main body material 40. The main body material 40 forms the inner space 7D that is open toward the outdoor side (outdoor space 13) at the opening 41.

[0047] The blocking material 50 is attached to the main body material 40 and blocks the opening 41 of the main body material 40. The blocking material 50 is installed between the left and right panel holding portions 7A, fixed to the left and right panel holding portions 7A, and attached to the opening 41 between the left and right panel holding portions 7A. In this state, the blocking material 50 is located between the inner space 7D and the outdoor space 13 and forms the outdoor surface portion 7H of the rib 7. The hollow portion 7C of the rib 7 is formed into a hollow shape by the main body material 40 and the blocking material 50. The inner space 7D of the rib 7 is formed inside the rib 7 and main body material 40 and is surrounded by the main body material 40 and the blocking material 50. The blocking material 50 is located at the opening 41 of the main body material 40 and blocks the opening 41, as well as blocking the inner space 7D of the rib 7 on the outdoor side (the outdoor space 13 side).

[0048] In the curtain wall unit 2 of the third embodiment, by changing the designs of the main material 40 and the sealing material 50, it is possible to easily change the design of the ribs 7 as viewed from the indoor side and the outdoor side. For example, the main material 40 and the sealing material 50 can be colored differently as part of their designs. Furthermore, by coloring the sealing material 50 a darker color than the main material 40, it is possible to make the joint space M3 less noticeable when the ribs 7 are viewed from the outdoor side.

[0049] The blocking material 50 may be provided not only over the entire longitudinal length of the backbone 7, but also over a portion of the longitudinal length of the backbone 7. For example, the blocking material 50 may be provided in a portion of the backbone 7 that includes the location of the communication opening 7E in the longitudinal direction, and the opening 41 of the main body material 40 may be left open in the portion of the backbone 7 other than the blocking material 50 in the longitudinal direction. In this case, the exhaust opening 7F may not be provided in the blocking material 50, and the open opening 41 of the main body material 40 in the open state may serve as the exhaust opening 7F.

[0050] As described above, the present embodiment discloses the curtain wall units described in the following items (1) to (6).

[0051] (1) A curtain wall unit comprising a frame body having an upper frame, a lower frame, left and right vertical frames, and a rib, an outdoor panel and an indoor panel held by the frame body, and left and right air spaces formed between the outdoor panel and the indoor panel and partitioned by the rib, The frame body has air intake ports that communicate each of the left and right air layers with an outdoor space, The central rib is a curtain wall unit having communication ports that connect each of the left and right air layers to the inner space of the central rib, and an exhaust port that connects the inner space to the outdoor space. In the curtain wall unit described in (1), the curtain wall unit has an air layer separated into left and right by a central frame, and the left and right air layers can be efficiently ventilated without complicating the ventilation structure of the left and right air layers.

[0052] (2) In the curtain wall unit described in (1), The rib has a hollow portion in which the communication port and the exhaust port are provided, The inner space is a curtain wall unit that is the space inside the hollow portion. In the curtain wall unit described in (2), the inner space of the core is located inside the hollow portion, making it difficult for water to enter the inner space of the core from the outdoor space through the exhaust port, thereby suppressing water penetration into the air layer.

[0053] (3) In the curtain wall unit described in (1) or (2), The central rib is a curtain wall unit having a first aggregate facing one of the left and right air layers, and a second aggregate connected to the first aggregate facing the other of the left and right air layers. In the curtain wall unit described in (3), it is possible to easily attach other components to each of the first aggregate and the second aggregate of the central frame, thereby improving the workability of the curtain wall unit.

[0054] (4) In the curtain wall unit described in (1) or (2), The central rib includes a main body material that separates the left and right air layers and has the communication port to form the inner space, and a closing material that has the exhaust port, The main body has an opening that opens the inner space toward the outdoor space, The closing material is a curtain wall unit attached to the main body material to close the opening. In the curtain wall unit described in (4), by changing the design of the main material and the sealing material, the design of the central frame as seen from the indoor side and the design as seen from the outdoor side can be easily changed.

[0055] (5) In the curtain wall unit described in any of (1) to (4), A curtain wall unit in which the communication port and the exhaust port are positioned at positions offset from each other in the vertical direction. The curtain wall unit described in (5) makes it difficult for water to enter the communication opening from the exhaust opening, thereby suppressing the intrusion of water into the air layer.

[0056] (6) In the curtain wall unit described in any of (1) to (5), The exterior panels are located on both the left and right sides of the central rib, The central rib has left and right panel holding portions that hold the left and right outdoor panels and form joint spaces between them that are open toward the outdoor space, The exhaust port is located on the indoor side of the joint space, and the curtain wall unit connects the indoor space and the outdoor space via the joint space. The curtain wall unit described in (6) can improve the design of the curtain wall unit. [Explanation of symbols]

[0057] 1···Curtain wall, 2···Curtain wall unit, 2A···Outdoor panel, 2B···First indoor panel, 2C···Second indoor panel, 2D···Air intake port, 3···Frame, 3A···Opening, 4···Top frame, 4A···Panel holding part, 5···Bottom frame, 5A···Panel holding part, 6···Vertical frame, 6A···Panel holding part, 7···Center frame, 7A···Panel holding part, 7B···Cover, 7C···Hollow part, 7D···Inner space, 7E···Communication port, 7F···Exhaust Opening, 7G... Side part, 7H... Outdoor surface, 8... Air layer, 10... Building, 11... Exterior wall, 12... Body, 13... Outdoor space, 20... First aggregate, 21... Outdoor connection part, 22... Indoor connection part, 30... Second aggregate, 31... Outdoor connection part, 32... Indoor connection part, 40... Main body material, 41... Opening, 50... Sealing material, M1... Joint space, M2... Joint space, M3... Joint space, R... Up and down direction, S... Left and right direction, T... Indoor / outdoor direction.

Claims

1. A curtain wall unit comprising: a frame body having an upper frame, a lower frame, left and right vertical frames, and a rib; an outdoor panel and an indoor panel held by the frame body; and left and right air spaces formed between the outdoor panel and the indoor panel and partitioned by the rib, The frame body has air intake ports that communicate each of the left and right air layers with an outdoor space, The central rib is a curtain wall unit having communication ports that connect each of the left and right air layers to the inner space of the central rib, and an exhaust port that connects the inner space to the outdoor space.

2. 2. The curtain wall unit according to claim 1, The rib has a hollow portion in which the communication port and the exhaust port are provided, The inner space is a curtain wall unit that is the space inside the hollow portion.

3. The curtain wall unit according to claim 1 or 2, The central rib is a curtain wall unit having a first aggregate facing one of the left and right air layers, and a second aggregate connected to the first aggregate facing the other of the left and right air layers.

4. The curtain wall unit according to claim 1 or 2, The central rib includes a main body material that separates the left and right air layers and has the communication port to form the inner space, and a closing material that has the exhaust port, The main body has an opening that opens the inner space toward the outdoor space, The closing material is a curtain wall unit attached to the main body material to close the opening.

5. The curtain wall unit according to claim 1 or 2, A curtain wall unit in which the communication port and the exhaust port are positioned at positions offset from each other in the vertical direction.

6. The curtain wall unit according to claim 1 or 2, The exterior panels are located on both the left and right sides of the central rib, The central rib has left and right panel holding portions that hold the left and right outdoor panels and form joint spaces between them that are open toward the outdoor space, The exhaust port is located on the indoor side of the joint space, and the curtain wall unit connects the indoor space and the outdoor space via the joint space.

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