Curtain Wall Unit

Abstract

To provide a curtain wall unit that can effectively prevent water from accumulating inside.SOLUTION: A curtain wall unit 1 includes a pair of vertical frames, a horizontal frame 2 disposed between the pair of vertical frames and attached to the pair of vertical frames, a window 101 arranged between the pair of vertical frames and arranged on the horizontal frame, a window support body 3 provided at a lower end 101a of the window, a connecting part 6 for connecting the window support body and the horizontal frame, a drain valve 8 positioned on the indoor side of the lower end part of the window and attached to the window support body, and an internal drainage path RI that is formed in communication with the outside via multiple openings formed in the horizontal frame, and drains water from the drain valve through the indoor side of the connecting part to the end part of the horizontal frame on the outdoor side.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present disclosure relates to curtain wall units. [Background technology]

[0002] Conventionally, in buildings such as mid- to high-rise buildings, curtain walls have been used in which multiple curtain wall units are attached to the building frame to form the exterior walls. For example, in Patent Document 1, a curtain wall is formed by connecting multiple curtain wall units, each with a frame and glass panels arranged inside, lengthwise and widthwise. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-219831 Summary of the Invention [Problem to be solved by the invention]

[0004] Condensation may occur inside a curtain wall unit due to the temperature difference between the inside and outside of a building, and the water generated by the condensation may accumulate inside the curtain wall unit. Rainwater may also seep into the interior of the curtain wall unit's components. Water accumulation inside the curtain wall unit may cause flooding inside the room or affect the durability of the components. Therefore, the curtain wall in Patent Document 1 uses a sealing material to ensure watertightness and thermal insulation, while forming a path for introducing outside air and employing an equal-pressure structure that suppresses the generation of pressure differences between the inside and outside of the curtain wall unit. However, further improvements in the ability to prevent water generated by environmental factors from accumulating inside the curtain wall unit are desired.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to provide a curtain wall unit that can effectively prevent water from accumulating inside the curtain wall. [Means for solving the problem]

[0006] A curtain wall unit according to one aspect of the present disclosure comprises a pair of vertical frames, a horizontal frame disposed between the pair of vertical frames and attached to the pair of vertical frames, a window disposed between the pair of vertical frames and placed on the horizontal frame, a window support provided at the lower end of the window, a connecting portion connecting the window support and the horizontal frame, a drain valve located on the indoor side of the lower end of the window and attached to the window support, and an internal drainage path formed to communicate with the outdoors via a plurality of openings formed in the horizontal frame, and draining water from the drain valve through a portion indoors relative to the connecting portion to the outdoor end of the horizontal frame. The horizontal frame is formed with a first opening that opens below the drain valve, a second opening that opens below the connecting portion, and a third opening that is formed in the exterior wall of the horizontal frame and opens at a position lower than the first opening and the second opening, and the internal drainage path is formed so that water is drained from the drain valve through the first opening and the second opening and then from the third opening. . [Brief explanation of the drawings]

[0007] [Figure 1] Front view of a curtain wall including curtain wall units. [Figure 2] FIG. 1 is a perspective view of a curtain wall unit. [Figure 3] FIG. 1 is an exploded perspective view of a curtain wall unit. [Figure 4] 2. FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 5] FIG. [Figure 6] A top view of Figure 5. [Figure 7] A longitudinal section of the horizontal frame of a curtain wall unit. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] Top view of the horizontal frame body. [Figure 11] Front view of the horizontal frame body. [Figure 12] Top view of the attachment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, one embodiment of the curtain wall unit 1 will be described with reference to the drawings. As shown in Fig. 1, the curtain wall unit 1 is formed by connecting a plurality of curtain wall units 1 to form a curtain wall 200. As shown in Figs. 2 and 3, the curtain wall unit 1 includes a pair of vertical frames 106, windows 101, 102, 103, 104, and a horizontal frame 2.

[0009] In the following description, the thickness direction of the windows 101, 102, 103, and 104 is referred to as the indoor / outdoor direction Y. Of the directions perpendicular to the indoor / outdoor direction Y, the horizontal direction is referred to as the width direction X, and the vertical direction is referred to as the length direction Z.

[0010] As shown in FIG. 1, the frame 105 is formed into a rectangle by a pair of vertical frames 106, an upper frame 109, and a lower frame 108. The frame 105 is made of, for example, aluminum extrusions. As shown in FIG. 2, windows 101, 102, 103, and 104 are arranged between the pair of vertical frames 106. As an example, a curtain wall unit 1 is shown having multiple built-in windows 101, 102, 103, and 104 inside the frame 105, but the number of windows in the curtain wall unit 1 is not limited to the illustrated example. As shown in FIG. 4, the windows 101 and 102 are double-glazed windows fixed around all four sides to glass support parts 111. In the illustrated example, the lower window 102 and the upper window 104 are shown as single-glazed windows. Each window may be single-glazed or double-glazed.

[0011] The horizontal frame 2, which serves as a moat, is arranged between a pair of vertical frames 106. The horizontal frame 2 is attached to the pair of vertical frames 106. Both longitudinal ends of the horizontal frame 2 are fixed to the inside of the pair of opposing vertical frames 106. A window 101 is provided on the horizontal frame 2. The horizontal frame 2 supports the window 101. As shown in Figure 7, the horizontal frame 2 comprises a horizontal frame main body 5, an attachment 4, and a cover 7. The horizontal frame main body 5, the attachment 4, and the cover 7 are each members that are long in the width direction X.

[0012] As shown in FIG. 7 , the horizontal frame body 5 includes an inner hollow portion 51, an upper connection portion 54, an outer hollow portion 52, and a receiving portion 53. The inner hollow portion 51 has a hollow portion with a generally rectangular cross section in the indoor-outdoor direction Y and is positioned closer to the indoor side I than the outer hollow portion 52. The upper connection portion 54 is formed to protrude upward from the upper wall 514 of the inner hollow portion 51. The upper connection portion 54 is a portion that connects to the attachment 4. The upper connection portion 54 includes a first upper connection portion 541 and a second upper connection portion 542. The first upper connection portion 541 is formed to protrude upward from the upper end of the side wall 512 on the indoor side I of the inner hollow portion 51. The second upper connection portion 542 is formed to protrude upward from the upper end of the side wall 513 on the outdoor side O of the inner hollow portion 51. The second upper connection portion 542 has a locking piece 543. The upper end of the locking piece 543 protrudes above the upper wall 524 of the outer hollow portion 52 and is inclined downward toward the room I. A second opening 5a is formed in the locking piece 543. The second opening 5a is formed by cutting out the corner of the upper end of the outer hollow portion 52 on the room I side. As shown in Figures 10 and 11, the second openings 5a are formed at multiple locations spaced apart from each other in the width direction X of the locking piece 543.

[0013] The outer hollow portion 52 is provided continuous with the inner hollow portion 51 on the outdoor side O. The outer hollow portion 52 is provided at a position spanning the inner hollow portion 51 and the upper connecting portion 54 in the vertical direction Z. The upper wall 524 of the outer hollow portion 52 is higher than the upper wall 514 of the inner hollow portion 51. The lower wall 521 of the outer hollow portion 52 is higher than the lower wall 511 of the inner hollow portion 51. The lower wall 521 of the outer hollow portion 52 has an inclined portion 522 that slopes downward on the outdoor side O. The upper wall 524 of the outer hollow portion 52 has an inclined portion 525 that slopes downward on the outdoor side O. A third opening 5b is formed in an outer wall 526 of the outer hollow portion 52. The third opening 5b is a hole that penetrates the outer wall 526 in the indoor-outdoor direction Y. The outer wall 526 of the outer hollow portion 52 is an example of an outdoor side wall. As shown in FIG. 5, the third openings 5b are formed at a plurality of locations spaced apart in the width direction X.

[0014] An accommodation groove 527 that protrudes upward is formed in the upper part of the upper wall 524 of the outer hollow portion 52. The accommodation groove 527 is formed over substantially the entire area of ​​the horizontal frame main body 5 in the width direction X.

[0015] The receiving portion 53 protrudes substantially horizontally from the outer end of the upper wall 524 of the outer hollow portion 52 toward the outside O. Locking protrusions 532, 533 are formed on both ends of the receiving portion 53 in the indoor-outdoor direction Y. A sixth opening 5c ​​penetrating in the vertical direction Z is formed between the locking protrusions 532, 533 of the receiving portion 53. As shown in Figures 5, 6, 9, and 10, the sixth openings 5c are formed at multiple locations spaced apart in the width direction X.

[0016] For ease of explanation, FIG. 7 shows the first opening 4a, the second opening 5a, the third opening 5b, the fourth opening 3a, the fifth opening 7a, and the sixth opening 5c ​​on the same cross section. The first opening 4a, the second opening 5a, and the third opening 5b are formed in overlapping positions in the width direction X, while the fourth opening 3a, the fifth opening 7a, and the sixth opening 5c ​​are formed in overlapping positions in the width direction X. The positions of the first opening 4a, the second opening 5a, and the third opening 5b in the width direction X may be closely offset, but at least partial overlap is preferred for smooth drainage. Similarly, the positions of the fourth opening 3a, the fifth opening 7a, and the sixth opening 5c ​​in the width direction X may be closely offset. It is preferable that the first opening 4a, the second opening 5a, the third opening 5b, the fourth opening 3a, the fifth opening 7a, and the sixth opening 5c ​​are positioned so that they at least partially overlap, as this allows for smooth drainage.It is preferable that the first opening 4a, the second opening 5a, the third opening 5b, the fourth opening 3a, the fifth opening 7a, and the sixth opening 5c ​​are positioned so that they at least partially overlap, as this allows for smooth drainage.

[0017] The horizontal frame body 5 is provided with a window accommodating portion 57. The window accommodating portion 57 has a groove shape that opens downward. The window accommodating portion 57 is configured to be able to accommodate and fix the upper end portion of a window 102 that is arranged below the horizontal frame 2. The window accommodating portion 57 does not have to be provided integrally with the horizontal frame body 5.

[0018] The attachment 4 is a component that is connected to the window support 3. The attachment 4 is a component that connects the horizontal frame main body 5 and the window support 3. The attachment 4 is provided between the intermediate window unit 110 and the horizontal frame 2 when the intermediate window unit 110 shown in Figure 3 is installed in a location where the dimensions between the horizontal frames 2 are different. The attachment 4 is attached to the upper part of the horizontal frame main body 5 on the room I side. The attachment 4 comprises a fixing portion 42, a flat portion 41, a locking portion 46, a lower locking portion 47, and a water-stopping portion 48. The fixing portion 42 has a flat plate shape. The fixing portion 42 is arranged along the side wall 512 on the room I side of the inner hollow portion 51. The fixing portion 42 is fixed to the frame and the horizontal frame main body 5 with screws 90. The upper end of the fixing portion 42 engages with the window support 3.

[0019] The flat plate portion 41 has a flat plate shape that protrudes and extends substantially horizontally from the fixed portion 42 toward the outside O. The flat plate portion 41 is spaced apart from the fixed portion 42 above the upper wall 514 of the inner hollow portion 51 and is provided so as to cover the upper part of the inner hollow portion 51. A first opening 4a that penetrates the flat plate portion 41 in the vertical direction Z is formed. In FIGS. 5 and 6, the cover 7 is omitted and the horizontal frame 2 is illustrated. As shown in FIGS. 5, 6, and 12, the first openings 4a are formed in multiple locations spaced apart in the width direction X.

[0020] A locking portion 46 is formed on the end of the upper surface of the flat plate portion 41 of the attachment 4 on the outdoor O side. The locking portion 46 stands upward from the upper surface of the flat plate portion 41 and has an L-shaped cross section with the upper end bent toward the outdoor O.

[0021] A lower locking portion 47 is formed on the end of the underside of the flat plate portion 41 of the attachment 4 facing the outside O. The lower locking portion 47 hangs down from the underside of the flat plate portion 41 and has an L-shaped cross section with its lower end bent toward the outside O.

[0022] The water-stopping portion 48 protrudes further toward the outside O than the end of the flat plate portion 41 on the outside O side. The water-stopping portion 48 has an inclined portion 482 that inclines obliquely upward from a contact portion 481 with the upper end of the locking piece 543 of the horizontal frame main body 5, and a pressing portion 483 that extends in a substantially horizontal direction.

[0023] The cover 7 is a plate-shaped component that covers the horizontal frame 2, the connecting portion 6, and the window support 3 from the exterior side O. The cover 7 includes a cover body 71 and a locking portion 72. The cover body 71 has a plate shape that is elongated in the width direction X. The cover body 71 is disposed along the vertical direction Z. The locking portion 72 extends from the interior side I of the cover body 71 toward the interior side I. A fifth opening 7a is formed in the locking portion 72. The fifth opening 7a is formed by cutting out the locking portion 72 at a position that overlaps with the sixth opening 5c ​​of the receiving portion 53 in the width direction X. The cover 7 prevents the connecting portions of the horizontal frame 2, the horizontal frame body 5, the attachment 4, the window support 3, etc. from being exposed to the outside. The cover 7 is provided for the purposes of windproofing, waterproofing, and enhancing the exterior design. If the third opening 5b is configured not to open toward the outside O, the cover 7 is not an essential component from the viewpoint of ensuring the internal drainage route RI of the horizontal frame 2.

[0024] A window support 3 is provided at the lower end 101a of the window 101. The window support 3 is provided at the upper part of the horizontal frame 2 on the outside O side.

[0025] As shown in Figures 7 to 9, the window support body 3 includes a window receiving portion 31, a positioning portion 32, a connecting portion 33, and a locking portion 36. The window receiving portion 31 is attached to the lower end 101a of the window 101 to support the window 101. The window receiving portion 31 has a flat plate shape. The window receiving portion 31 is arranged in a substantially horizontal direction. A fourth opening 3a is formed at the end of the window receiving portion 31 on the outside O side, near the end on the outer surface 101b side of the window 101. The fourth opening 3a is an opening that penetrates the window receiving portion 31 in the vertical direction Z.

[0026] A locking portion 36 is formed in the middle of the underside of the window support 3 in the indoor / outdoor direction Y. The locking portion 36 has an L-shaped cross section that extends downward from the underside of the window support 3 and bends toward the room I.

[0027] The positioning portion 32 is higher than the window support portion 31 and is positioned closer to the outside room O than the window support portion 31. The positioning portion 32 is configured to be able to hold the window 101 in a position spaced apart from the frame. A drain valve 8 is attached to the positioning portion 32 of the window support 3. As shown in Figures 7 and 8, a drain valve attachment hole 34 is formed in the positioning portion 32, into which the drain valve 8 is inserted and fixed. The drain valve 8 is a valve that allows water adhering to the upper surface of the window support 3 to pass downward, and prevents water from seeping into the room I from below the window support 3.

[0028] The connecting portion 33 protrudes downward from the lower surface of the positioning portion 32. The connecting portion 33 is engaged with the fixing portion 42 of the attachment 4. The connecting portion 33 is fixed to the attachment 4 by inserting a screw 90 into a screw hole 331 shown in FIG.

[0029] The structure of the curtain wall unit 1 will be described. As shown in FIG. 7 , a window support 3 is fixed to the lower end of a window 101. The lower end of the fixing portion 42 of the attachment 4 is fixed to the side wall 512 on the room I side of the horizontal frame main body 5 with a screw 90. The locking piece 543 of the horizontal frame main body 5 is locked to the lower locking portion 47 of the attachment 4. The contact portion 481 of the attachment 4 contacts the upper end of the locking piece 543 of the horizontal frame main body 5. The locking piece 543 contacts the lower locking portion 47 to form an engagement portion 9. The engagement portion 9 is located below the connecting portion 6. A storage groove 527 is disposed below the pressing portion 483. A water-stopping material 58 is attached to the storage groove 527. The water-stopping material 58 is, for example, a packing made of soft resin. Because the water-stopping material 58 and the pressing portion 483 are in contact with each other, the water-stopping material 58 is more effective at preventing water from seeping into the room I side and preventing wind from entering.

[0030] The window support 3 and horizontal frame 2 are connected by a connecting portion 6. The horizontal frame main body 5 and the attachment 4 are fixed with screws 90, and the locking portion 46 of the attachment 4 engages with the locking portion 36 of the window support 3, thereby connecting the window support 3 and horizontal frame 2 by the connecting portion 6. The locking portion 46 and the locking portion 36 are provided over approximately the entire length of the window support 3 and the horizontal frame main body 5 in the width direction X, respectively. The connecting portion 6 is engaged with the L-shaped locking portions 36, 46 facing each other. The connecting portion 6 determines the position of the window support 3 relative to the horizontal frame 2 and also blocks the space around the connecting portion 6 in the indoor-outdoor direction Y.

[0031] The attachment 4 and the horizontal frame body 5 are in contact with each other at the pressing portion 483 and the water-stopping material 58, and at the contact portion 481 and the locking piece 543. Therefore, the attachment 4 and the horizontal frame body 5 prevent water and wind from entering at two locations in the indoor-outdoor direction Y. The fourth opening 3a opens above the pressing portion 483. Therefore, even if water falls from the fourth opening 3a via the lower end of the window 101, the water-stopping material 58 is covered above by the pressing portion 483, preventing water from seeping in. Even if water that falls from the fourth opening 3a flows along the pressing portion 483 toward the outdoor area O, it is less likely to seep into the indoor area I because the connecting portion 6 is located closer to the outdoor area O than the fourth opening 3a.

[0032] The locking portion 72 of the cover 7 is locked to the receiving portion 53 of the horizontal frame body 5. The sixth opening 5c ​​of the receiving portion 53 and the fifth opening 7a of the locking portion 72 are open at a position where they overlap.

[0033] The upper end of a window 102 disposed below the horizontal frame 2 is accommodated and fixed in the window accommodating portion 57.

[0034] An internal drainage path RI is formed in the curtain wall unit 1. The internal drainage path RI is formed to communicate with the outside O through multiple openings 4a, 5a, and 5b formed in the horizontal frame 2. The internal drainage path RI drains water from the drain valve 8, passing through the interior I side of the connecting portion 6, through the first opening 4a and the second opening 5a, and then through the third opening 5b to the end on the outside O side. Specifically, the internal drainage path RI is a drainage path that communicates with the outside O through the first opening 4a that opens below the drain valve 8, the second opening 5a that opens below the connecting portion 6, and the third opening 5b formed in the outer wall 526 of the outer hollow portion 52 of the horizontal frame main body 5. Water flowing downward from the drain valve 8 reaches the flat plate portion 41. The water flows downward from the first opening 4a without accumulating on the flat plate portion 41 and flows onto the upper wall 514 of the inner hollow portion 51. Water that flows onto the upper wall 514 of the inner hollow portion 51 passes through the second opening 5a and flows into the outer hollow portion 52. The water that flows into the inner hollow portion 51 flows down the inclined portion 522 and is drained from the third opening 5b. The water that flows from the third opening 5b passes between the cover 7 and the outer wall 526 and is drained to the outside O. Because the third opening 5b opens at a lower position than the first opening 4a and the second opening 5a, the water that flows into the inner hollow portion 51 is smoothly guided to the third opening 5b.

[0035] 9 to 12, the first openings 4a, second openings 5a, and third openings 5b are each formed in plurality at intervals in the width direction X. Therefore, condensation water and rainwater are less likely to accumulate in the area of ​​the horizontal frame 2 on the indoor I side from the bottom of the window 101, and are smoothly drained away.

[0036] In addition to the interior drainage path RI, the curtain wall unit 1 is also equipped with an exterior drainage path RO. The exterior drainage path RO drains water from the window support 3 to the end of the horizontal frame 2 on the exterior O side through multiple openings formed in the horizontal frame 2 on the exterior O side of the connecting portion 6. The exterior drainage path RO allows water that flows into the window support 3 from the lower end of the window 101 to flow downward through the fourth opening 3a, and then through the fifth opening 7a and the sixth opening 5c. Water that flows through the sixth opening 5c ​​flows downward along the slope 525, passes between the cover 7 and the exterior wall 526, and is drained to the exterior O. Multiple exterior drainage paths RO are formed at intervals in the width direction X of the curtain wall unit 1. Rainwater that flows down from the window 101 is smoothly drained through the exterior drainage path RO.

[0037] A method for installing the curtain wall unit 1 at a construction site will be described. The curtain wall unit 1 is prepared with the frame 105 and the windows 101, 102, 103, and 104 separated. At the construction site, the frame 105 is first fixed, and then the windows 101, 102, 103, and 104 are installed from the interior I side, as shown in Figure 3. Grooves into which the windows 101, 102, 103, and 104 are inserted are formed on the inner periphery of the frame 105. The upper ends of the windows 101, 102, 103, and 104 are inserted into the groove of the upper frame 109, and one vertical end of the window 101, 102, 103, and 104 is inserted into the groove of the vertical frame 106 and pushed all the way into the groove. The windows 101, 102, 103, and 104 are shifted widthwise, and the other vertical end is placed in the groove of the other vertical frame 106. Thereafter, the lower ends of the windows 101, 102, 103, and 104 are covered and fixed with fixing members (not shown). In the example shown in Figure 3, the windows 101, 102, 103, and 104 are prepared in advance and divided into an upper window 104, a lower window 102, and a middle window unit 110. After the upper window 104 and the lower window 102 are fixed to the frame 105, the middle window unit 110 is fixed. Before or after the lower ends of the windows 101, 104, and the middle window unit 110 are fixed, the windows are waterproofed or the like using a known method.

[0038] The curtain wall unit 1 further includes an intermediate drainage path RM. The engagement portion 9 is disposed between the interior drainage path RI and the exterior drainage path RO, which will be described later. The end of the engagement portion 9 on the interior side I side is exposed to the interior drainage path RI. The engagement portion 9 has the locking piece 543 in contact with the lower locking portion 47, preventing water from seeping from the exterior side O to the interior side I side. However, because the locking piece 543 and the lower locking portion 47 are in surface contact with each other, water may seep into the interior side I side through the engagement portion 9 if the air pressure difference between the interior and exterior of the curtain wall unit 1 is large. In addition, the water-stopping material 58 and the pressing portion 483 are also pressed together. However, if the water-stopping material 58 deteriorates over time or if the air pressure difference between the interior and exterior of the curtain wall unit 1 is large, water may seep into the interior side I side through the engagement portion 9. The curtain wall unit 1 provides the intermediate drainage path RM by exposing the end of the engagement portion 9 on the exterior side O side to the interior drainage path RI. By providing an intermediate drainage path RM, the curtain wall unit 1 can allow water that has seeped into the room I from the engagement portion 9 to merge with the internal drainage path RI and be drained to the outside O side through the second opening 5a and the third opening 5b.

[0039] The first opening 4a opens into the flat plate portion 41 of the attachment 4 located below the drain valve 8. In the illustrated example, the first opening 4a opens closer to the outside O than the drain valve 8 in the indoor-outdoor direction Y, but the position of the first opening 4a is not limited to the illustrated example. The first opening 4a may be located below the drain valve 8 and may be configured to penetrate vertically through a portion that forms the upper surface of the horizontal frame 2, which is the surface that receives water flowing from the drain valve 8.

[0040] According to the curtain wall unit 1, an internal drainage path RI is provided on the outside O side of the connecting portion 6, so that water generated inside the curtain wall unit 1 can be effectively prevented from accumulating within the components and can be drained smoothly.

[0041] According to the curtain wall unit 1, the internal drainage route RI can drain water from the drain valve 8 through the first opening 4a and the second opening 5a to the outside O side through the third opening 5b of the outer hollow portion 52. Therefore, water generated on the indoor I side of the curtain wall unit 1 can be smoothly drained from the drain valve 8 to the outside O side. The third opening 5b opens at a lower position than the first opening 4a and the second opening 5a, allowing for smooth drainage.

[0042] According to the curtain wall unit 1, multiple internal drainage channels RI are formed at intervals in the width direction of the window 101. The curtain wall unit 1 can drain water to the outside O side from multiple locations in the width direction X, thereby preventing water from accumulating.

[0043] The curtain wall unit 1 has an attachment 4 attached to a horizontal frame 2. A first opening 4a is formed in the attachment 4. Water that flows downward from a drain valve 8 provided on the window support 3 can be smoothly drained from the first opening 4a of the attachment 4. This prevents water from accumulating in the attachment 4 for a long period of time.

[0044] The curtain wall unit 1 is provided with an internal drainage path RI and an external drainage path RO, so that water such as rainwater that seeps into the bottom of the window 101 flows through the connecting portion 6 to the outside O side and is smoothly drained away. The curtain wall unit 1 can prevent rainwater from seeping into the room O side. Because the curtain wall unit 1 is formed with an internal drainage path RI, water that occurs on the indoor I side of the window 101, such as condensation water, can be smoothly drained to the outside O side.

[0045] The horizontal frame 2 is not limited to the example of the above embodiment. For example, the attachment 4 may be formed integrally with the horizontal frame main body 5. Alternatively, the upper connecting portion 54 and the attachment 4 may be formed integrally, and a hollow portion may be provided above the inner hollow portion 51, with the first opening 4a and the second opening 5a formed in this hollow portion, forming an inner drainage path and an intermediate drainage path. The configuration in which the horizontal frame 2 has the inner hollow portion 51 and the outer hollow portion 52 is not essential. For example, a horizontal frame having one hollow portion below the connecting portion, or a horizontal frame having three or more hollow portions below the connecting portion may be used.

[0046] In the above embodiment, an example was shown in which a window was arranged inside a frame body 105 that included a pair of vertical frames 106, a bottom frame 108, and an top frame 109, but the curtain wall unit 1 is not limited to this example. A configuration may also be used in which the bottom frame 108 and top frame 109 are not included, and the window is arranged inside a pair of vertical frames 106 and horizontal frames 2, and curtain wall units lined up in the vertical direction Z are connected by horizontal frames.

[0047] Although the first opening 4a, the second opening 5a, the third opening 5b, the fourth opening 3a, the fifth opening 7a, and the sixth opening 5c ​​are shown as elongated holes, round holes, and notches, the shapes of the openings are not limited to these examples. The first opening 4a, the second opening 5a, the third opening 5b, the fourth opening 3a, the fifth opening 7a, and the sixth opening 5c ​​may have any shape that allows water to pass through.

[0048] The above-described embodiments are merely examples and are not limited to the scope of the disclosure. The above-described embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the disclosure. These embodiments and their modifications are included in the scope of the claims and their equivalents. [Explanation of symbols]

[0049] 1...Curtain wall unit, 2...Horizontal frame, 3...Window support, 3a...Fourth opening (opening), 4...Attachment, 4a...First opening, 5a...Second opening, 5b...Third opening, 5c...Sixth opening (opening), 6...Connecting portion, 7a...Fifth opening (opening), 8...Drain valve, 9...Engagement portion, 101...Window, 105...Frame body, 106...Vertical frame, 108...Bottom frame, 109...Top frame, RI...Internal drainage path, RO...External drainage path, 526...Exterior wall (outdoor wall)

Claims

1. A pair of vertical frames, a horizontal frame disposed between the pair of vertical frames and attached to the pair of vertical frames; a window disposed between the pair of vertical frames and disposed on the horizontal frame; a window support provided at the lower end of the window; a connecting portion that connects the window support and the horizontal frame; a drain valve located on the interior side of the lower end of the window and attached to the window support; An internal drainage path is formed in communication with the outside of the room through a plurality of openings formed in the horizontal frame, and drains water from the drain valve through the indoor side of the connecting portion to the outdoor end of the horizontal frame; Equipped with The horizontal frame is provided with a first opening that opens below the drain valve, a second opening that opens below the connecting portion, and a third opening that is formed on the outdoor side wall of the horizontal frame and opens at a position lower than the first opening and the second opening, The curtain wall unit is configured so that the internal drainage path drains water from the drain valve through the first opening and the second opening and out the third opening.

2. The horizontal frame includes an attachment that is connected to the window support; The first opening is formed in the attachment. The curtain wall unit of claim 1 .

3. The internal drainage channels are formed at intervals in the width direction of the window.

3. The curtain wall unit according to claim 1 or 2.

4. An external drainage path is provided through which water is drained from the window support to the outside end of the horizontal frame via an opening formed in the horizontal frame on the outside of the connecting portion. The curtain wall unit according to any one of claims 1 to 3.

5. A water stop portion is provided on the horizontal frame and extends in the width direction below the connecting portion, The water stop portion is disposed between the internal drainage path and the external drainage path, The indoor end of the water stop portion is exposed to the internal drainage path. The curtain wall unit according to claim 4.

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