JP5466064B2 - sash - Google Patents

Description

  The present invention relates to a sash in which inner and outer shoji are housed in a frame provided in a building opening, and more particularly to a sash capable of draining water that has entered the indoor side of an inner rail that guides the shoji to the outside of the room. .

  The sash provided at the opening of the building has a drainage structure in the lower frame against the intrusion of rainwater or the like. In addition, in a sash in which the inner and outer shoji are housed in the frame, the inner and outer rails for guiding the inner and outer shoji are formed in the lower frame. On the side of the lower frame where the shingles are placed, the outdoor side of the lower frame is directly exposed to the outside of the room, while on the side of the lower frame, the side of the shingles is placed outside of the outer rail. , Exposed directly to the outdoors. For this reason, especially in the area directly exposed to the outside, water is directly guided to the hollow portion of the lower frame by providing a drain hole on the upper surface of the lower frame.

  On the other hand, since the hollow part of the lower frame leading to the outdoor side is provided over the area between the inner and outer rails, water cannot be guided directly from the area on the indoor side to the hollow part of the lower frame. Further, since the amount of water entering the indoor side of the inner rail is usually considerably small, a drain hole as much as the outdoor side is not required. For this reason, water is once led to the area between the inner and outer rails through the drain hole provided in the inner rail from the area on the inner side of the inner rail, and further drained from there to the hollow portion. As a sash having such a drainage structure, there is a sash described in Patent Document 1, for example.

JP-A-2005-97928

  The drain hole of the inner rail is usually formed not in the region on the side of the inner rail on which the shingles that separate the interior and the exterior are disposed, but on the region on the side on which the shingles that are exposed indoors are disposed. For this reason, water that has entered the area on the indoor side from the inner rail on the side where the shoji is placed flows first to the area on the side where the shoji is placed along the longitudinal direction of the lower frame. Drained to the outside of the rail.

  However, if the frame is tilted at the time of construction and the side of the shingles is low, or if a large amount of water accumulates in the inner area of the shingles, the drainage will not be performed efficiently. There was a possibility of overflowing water.

  This invention is made | formed in view of the said subject, and it aims at providing the sash which can drain | emit the water which permeated the room | chamber interior side of the inner rail among the upper surfaces of a lower frame to the outdoor side efficiently.

In order to solve the above-described problems, a sash according to the present invention houses an internal and external shoji in a frame formed by a framework of upper and lower frames and left and right vertical frames, and the inner and outer shoji are respectively formed on the upper surface of the lower frame. In the sash guided by
In the lower part of the inner rail of the lower frame, an inner drain hole is formed which constitutes a drainage path that communicates the inside and outside of the inner rail in a region where the inner shoji is arranged in a state where the inner and outer shoji is closed, A drainage bypass member that communicates with the inner drainage hole and guides water to the outdoor side is provided on the upper surface of the lower frame, and an end portion of the lower frame on the side where the inner and outer shojis are arranged with the inner and outer shojis closed. In this case, a bypass notch is formed in the outer rail, and the drainage bypass member is inserted into the bypass notch .

  The sash according to the present invention is characterized in that a concave indoor concave portion is formed on the indoor side of the inner rail, and an indoor resin cover material is provided so as to cover the indoor concave portion.

  Further, in the sash according to the present invention, the drain bypass member includes a communication channel portion that serves as a channel for water from the inner drain hole, and the upper surface of the indoor recess is more than the upper surface between the inner and outer rails of the lower frame. By being formed at a high position, a step is formed on the inside and outside across the inner rail, and the step is a height equivalent to the thickness of the inner wall constituting the communication flow path portion or a height greater than the thickness of the inner wall. It is characterized by having.

  Furthermore, in the sash according to the present invention, the upper surface between the inner and outer rails of the lower frame is formed to be inclined downward from the indoor side toward the outdoor side, and the drain bypass member is located indoors along the upper surface between the inner and outer rails. Is formed in a downward inclined shape toward the outdoor side.

  And the sash which concerns on this invention is comprised by the lower part of the outer rail of the said lower frame, The bypass notch part which makes the said drainage bypass member penetrate is provided.

  Further, the sash according to the present invention is characterized in that the drainage bypass member includes a vertical portion that is bent downward outward from the bypass notch, and a water outlet is provided at a tip portion of the vertical portion. It is configured.

  Furthermore, the sash according to the present invention is characterized in that a check valve is provided at the water outlet of the drainage bypass member.

  Furthermore, the sash according to the present invention is characterized in that the drainage bypass member integrally includes an outer door abutment block that can be brought into contact with the lower end portion of the outer panel.

  According to the sash according to the present invention, in the lower part of the inner rail of the lower frame, the inner drainage that constitutes the drainage path in which the inner rail and the outer rail communicate with each other in the region where the inner and outer shoji is arranged in a closed state. A hole is formed, and a drainage bypass member is provided on the upper surface of the lower frame so as to communicate with the inner drainage hole and guide the water to the outdoor side. In addition to being able to drain through the drainage hole, it is possible to prevent backflow to the indoor side and efficiently drain water that has entered the indoor side of the inner rail to the outdoor side.

  Further, according to the sash according to the present invention, a concave indoor recess is formed on the indoor side of the inner rail, and an indoor resin cover material is provided so as to cover the indoor recess. Moreover, since an inner side drain hole can also be concealed, the design property can be improved.

  Furthermore, according to the sash according to the present invention, the upper surface of the interior recess is formed at a position higher than the upper surface between the inner and outer rails of the lower frame, so that a step is formed inside and outside the inner rail, and the step is communicated By having a height equivalent to the thickness of the inner wall constituting the flow channel portion or a height greater than the thickness of the inner wall, the flow channel of the communication flow channel portion of the drain bypass member from the indoor recess is continuous or the communication flow channel side. Therefore, smooth drainage can be performed without hindering the flow of water from the interior recess.

  Furthermore, according to the sash according to the present invention, the upper surface between the inner and outer rails of the lower frame is formed in a downwardly inclined shape from the indoor side toward the outdoor side, and the drainage bypass member extends from the indoor side along the upper surface between the inner and outer rails. By being formed in a downward inclined shape toward the outdoor side, water can be smoothly drained toward the outdoor side on the lower frame upper surface and the drain bypass member.

  And, according to the sash according to the present invention, the lower portion of the outer rail of the lower frame is provided with a bypass notch portion through which the drainage bypass member is inserted, thereby bringing the drainage bypass member to the outside of the outer rail, More reliable drainage can be achieved.

  Further, according to the sash according to the present invention, the drainage bypass member includes the vertical portion that is bent downward toward the outdoor side from the bypass notch portion, and the water outlet is provided with the water outlet at the tip portion of the vertical portion. Is located below the upper surface of the lower frame, so that backflow of water and air can be prevented.

  Furthermore, according to the sash according to the present invention, a check valve is provided at the water outlet of the drainage bypass member, so that backflow of water and air can be prevented more reliably.

  Furthermore, according to the sash according to the present invention, the drainage bypass member is integrally provided with an outer door contact block that can be brought into contact with the lower end portion of the external shoji, thereby reducing the number of parts and man-hours. Cost reduction.

It is a longitudinal cross-sectional view of the sash in this embodiment. It is a cross-sectional view of a sash. FIG. 2 is an enlarged view of the vicinity of the lower frame in FIG. 1. It is a top view of a lower frame. It is the perspective view seen from the outdoor side of the lower frame It is the perspective view which cut and extracted a part of lower frame. FIG. 6 is an enlarged perspective view of the vicinity of the end portion on the side where the inner frame of the lower frame is disposed. It is sectional drawing of the lower frame of the part in which a drainage bypass member is provided. FIG. 8 is a perspective view excluding an outer door contact block in FIG. 7.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a sash according to the present embodiment, and FIG. 2 is a transverse sectional view of the sash. As shown in each of these drawings, the sash of the present embodiment includes an inner frame 2 and an outer frame in a frame 1 in which an upper frame 10, a lower frame 11, and left and right vertical frames 12, 12 are framed in a square shape. 3 is placed in a draw. In addition, a screen door 4 is also housed outside the outside door 3.

  The frame 1 has a configuration in which a resin material is disposed on the indoor side of the metal material over four circumferences. The upper frame 10 covers the exposed portion on the indoor side of the metal upper frame 10a with a resin upper frame 10b. The lower frame 11 has a resin cover member 11b covering a portion of the upper surface of the metal lower frame 11a exposed to the indoor side, and further covering an indoor side portion with the indoor resin cover material 11c. The vertical frame 12 covers the indoor exposed portion of the metal vertical frame 12a with a resin vertical frame 12b. Further, an inner rail 23 and an outer rail 24 for guiding the inner shoji 2 and the outer shoji 3 are provided so as to protrude from the upper surface of the metal lower frame 11a.

  Each of the inner shoji 2 and the outer shoji 3 is configured by placing a glass body 6 in a housing 5 formed by assembling an upper collar 40, a lower collar 41, and left and right vertical collars 42, 42 into a square shape. Yes. As with the frame 1, the housing 5 has a configuration in which a resin material is disposed on the indoor side of the metal material over four circumferences. The upper collar 40 covers the exposed portion on the indoor side of the metal upper collar 40a with a resin upper collar 40b. The lower collar 41 covers the exposed portion of the metal upper collar 41a on the indoor side with a resin lower collar 41b. The vertical gutter 42 covers the indoor side exposed portion of the metal vertical gutter 42a with a resin vertical gutter 42b. Further, a door wheel 41c is provided at the lower end of the lower arm 41, and the shoji 2, 3 is placed on the inner rail 23 in the inner shoji 2 and on the outer rail 24 in the outer shoji 3, so that each shoji 2, 3 is placed in the lower frame. 11 so that it can run in the longitudinal direction.

  As shown in FIG. 2, in the state in which the inner shoji 2 and the outer shoji 3 are closed, the inner shoji 2 is disposed on the right side in the figure, and the outer shoji 3 is disposed on the left side in the figure. In the area where the inner impeller 2 is arranged, the inner rail 23 separates the inside and outside of the lower side of the frame 1. On the other hand, in the area where the shoji 3 is arranged, the outer rail 24 separates the interior and the exterior on the lower side of the frame 1.

  On the upper surface of the lower frame 11, an inner door contact block 27 is provided at the end of the inner rail 23 adjacent to the vertical frame 12 on the side where the external shoji 3 is arranged, and the vertical side on the side where the internal shoji 2 is arranged. An outer door contact block 28 is provided at the end of the outer rail 24 adjacent to the frame 12. When the inner door stopper block 27 is moved and opened, the inner door contact block 27 comes into contact with the lower end portion of the casing 5 so that the casing 5 does not collide with the vertical frame 12. Similarly, when the door block 28 is moved and opened, the outer door contact block 28 comes into contact with the lower end portion of the housing 5 so that the housing 5 does not collide with the vertical frame 12.

  FIG. 3 shows an enlarged view of the vicinity of the lower frame 11 of FIG. As shown in this figure, the metal lower frame 11a includes a hollow section 20 having a hollow cross section, and an inner rail 23 projects from the indoor end portion of the upper surface 21 constituting the hollow portion 20, and the outer rail extends from the outdoor end portion of the upper surface. 24 protrudes. That is, the upper surface 21 of the hollow portion 20 constitutes the upper surface between the inner rail 23 and the outer rail 24 in the lower frame 11. The above-described cover member 11b is attached so as to cover the upper surface 21.

  The cover member 11b includes an upper surface covering portion 30 that covers the upper surface 21 of the metal lower frame 11a, a rising portion 32 that rises from the outdoor end portion of the upper surface covering portion 30 toward the outer rail 24, and an inner rail that extends from the lower surface of the upper surface covering portion 30. 23, and an indoor locking portion 35 locked to the outer rail 24 from the lower surface of the upper surface covering portion 30.

  The upper surface covering portion 30 of the cover member 11b is separated from the upper surface 21 of the metal lower frame 11a, and a space area therebetween serves as a drainage path 36 for flowing water on the upper surface of the lower frame 11 from the indoor side to the outdoor side. Yes. The upper surface 21 of the metal lower frame 11a constituting the drainage path 36 is formed in a downwardly inclined shape from the indoor side toward the outdoor side so that water can easily flow from the indoor side to the outdoor side. The upper surface covering portion 30 of the cover member 11b is also inclined downward from the indoor side toward the outdoor side.

  The rising portion 32 of the cover member 11b extends obliquely upward from the outdoor end portion of the upper surface covering portion 30 to the stepped locked portion 24b formed on the outer rail 24, and the tip end portion thereof becomes the locked portion 24b. It is locked against. For this reason, a space 32 a is formed between the rising portion 32 and the outer rail 24.

  On the indoor side of the metal lower frame 11a, the inner rail 23 is formed as an indoor recess 22 that forms one side. The indoor resin cover material 11 c is formed in a concave shape covering the indoor recess 22, and the indoor end portion extends toward the indoor side to constitute the angle portion 13. In addition, this angle part 13 is also formed in the resin upper frame 10b and the resin vertical frame 12b, and is provided so that it may extend over four rounds in the indoor edge part of the frame 1. FIG. A locked portion 23b is formed on the inner rail 23, and the outdoor surface of the indoor resin cover material 11c is locked and fixed to the locked portion 23b.

  Next, the drainage structure of the lower frame 11 will be described. The portions exposed to the outside of the frame 1 and the inner and outer shoji 2, 3 are exposed to rain water and the like, and also the portions exposed to the indoor side of the frame 1, the inner and outer shoji 2, 3 are condensed water. May occur. Since these waters fall down, they are received by the lower frame 11. For this reason, it is necessary to provide the lower frame 11 with a drainage structure for draining water on the outdoor side.

  FIG. 4 shows a plan view of the lower frame 11, and FIG. 5 shows a perspective view of the lower frame 11 viewed from the outdoor side. In FIG. 4, the upper side in the figure is the outdoor side, and the lower side in the figure is the indoor side. Accordingly, when the internal and external shojis 2 and 3 are closed, the internal shoji 2 is arranged on the right side in the figure, and the external shoji 3 is arranged on the left side in the figure. In FIG. 4, the area | region where the internal shingles 2 are arrange | positioned, and the area | region where the external obstacle 3 are arrange | positioned are each shown with the broken line.

  As shown in FIG. 4, a central block 26 is provided in an area between the inner rail 23 and the outer rail 24 of the lower frame 11 and in a central area where the inner shoji 2 and the outer shoji 3 are summoned. As shown in FIG. 5, the central block 26 includes a plurality of fin portions 26 a on the upper surface, and is provided to ensure airtightness at the summing portion of the inner and outer children 2 and 3. Cover members 11b are provided on both sides of the central block 26. Among these, the cover member 11b on the side where the outer shoji 3 is arranged, that is, the left cover member 11b in the drawing is exposed to the indoor side, and thus is formed of a resin material. On the other hand, the side where the shoji 2 is arranged, that is, the cover member 11b on the right side in the figure is exposed to the outdoor side and is therefore formed of a metal material. However, all have the same cross-sectional shape.

  An upper surface drain hole 31 is formed in the upper surface covering portion 30 in the cover member 11b on the side where the outer shingles 3 formed of a resin material are disposed. A plurality of upper surface drain holes 31 are formed so as to penetrate the upper surface covering portion 30 along the longitudinal direction of the cover member 11b. , Leading to the hollow portion 20 of the metal lower frame 11a.

  In the indoor resin cover material 11c, indoor upper surface drain holes 11e are formed in the vicinity of the center and in the vicinity of the end portion on the side where the inner shoji 2 is disposed. The indoor upper surface drain hole 11e guides water that has flowed into the upper surface of the indoor resin cover material 11c to the indoor recess 22 of the metal lower frame 11a.

  As shown in FIG. 5, an inner drainage hole 23 a is formed in the inner rail 23 that forms the indoor recess 22 of the metal lower frame 11 a in the region on the side where the outer panel 3 is disposed. The inner drain hole 23a is formed so as to extend both above and below the upper surface covering portion 30 of the cover member 11b, and both the water from the upper surface of the indoor resin cover material 11c and the water from the bottom surface of the indoor concave portion 22 It leads to the upper surface 21 between the rail 23 and the outer rail 24.

  As shown in FIG. 3, the water guided to the upper surface 21 between the inner rail 23 and the outer rail 24 passes through the outer drain holes 24 a formed in the lower portion of the outer rail 24, and Drained outside the room. As shown in FIG. 5, a plurality of drainage devices 25 are provided on the outdoor surface of the metal lower frame 11 a, and an outer drainage hole 24 a is formed on the back side of the drainage device 25. The drainage device 25 has a check valve inside, and prevents rainwater or the like from flowing back into the drainage path and flowing backward.

  As described above, on the side where the shoji 3 is disposed, the water that flows into the indoor side from the inner rail 23 is guided to the region between the inner rail 23 and the outer rail 24 from the inner drain hole 23a, and further the outer drainage. It drains to the outside from the hole 24a. On the other hand, the drainage path is formed by the drainage bypass member 29 provided at the end on the vertical frame 12 side on the side where the inner shoji 2 is arranged. The configuration will be described in detail later.

  On the side where the shoji 3 is disposed, drainage is performed from the upper surface 21 between the inner rail 23 and the outer rail 24 through the outer drainage hole 24a, but there was a backflow from the drainage side due to strong wind from the outdoor side. In such a case, the flow of air and water is separated to prevent the air and water from being ejected indoors.

  FIG. 6 shows a perspective view in which a part of the lower frame 11 is cut and taken out. As shown in this figure, an air communication hole 33 is formed in the rising portion 32 of the cover member 11b. As described above, the space portion 32a is formed between the rising portion 32 and the outer rail 24, and the outer drain hole 24a is disposed below the space portion 32a.

  Normally, water drained from the lower frame 11 is guided to the outer drainage hole 24a through the drainage path 36 between the upper surface 21 of the lower frame 11 and the upper surface covering portion 30 of the cover member 11b. On the other hand, when rainwater and wind blow in at the same time and there is a backflow from the outer drainage hole 24a, the air communicates from the space 32a between the rising part 32 and the outer rail 24 as shown by a thick arrow in FIG. Therefore, rainwater stops flowing in the reverse direction through the drainage path 36 and can be prevented from being ejected from the upper surface drainage hole 11e of the cover member 11b.

  The rising portion 32 of the cover member 11 b rises from the outdoor end of the upper surface covering portion 30 toward the outer rail 24, and the air communication hole 33 is formed at a position higher than the upper surface drain hole 11 e of the upper surface covering portion 30. It is possible to reliably pass the backflowed air and prevent the water from being ejected. Further, since the space portion 32a is provided between the rising portion 32 and the outer rail 24, this can be used as an air flow path. The rising portion 32 may be formed on the indoor side of the cover member 11b so as to rise toward the inner rail 23, and the air communication hole 33 may be formed there. The air can be surely extracted.

  Next, the drainage structure from the indoor concave portion 22 on the side where the inner shoji 2 is disposed will be described. FIG. 7 shows an enlarged perspective view of the vicinity of the end of the lower frame 11 on the side where the inner impingement 2 is disposed. As shown in this figure, the above-mentioned outer door contact block 28 is provided at the upper surface end of the lower frame 11 so as to straddle the outer rail 24, and the drainage bypass member 29 is provided at the lower part thereof. . In FIG. 7, only the outdoor end portion of the drainage bypass member 29 appears.

  In FIG. 8, sectional drawing of the lower frame 11 of the part in which the drainage bypass member 29 is provided is shown. FIG. 9 is a perspective view in which the outer door contact block 28 in FIG. 7 is removed. As shown in FIG. 8, the inner drain hole 23 a of the inner rail 23 communicates the inside and outside of the inner rail 23, thereby forming a drain path between the indoor recess 22 and the outer side of the inner rail 23. The member 29 includes a communication flow path portion 29a that communicates with the inner drain hole 23a and guides water from the indoor recess 22 to the outdoor side, and this communication flow path portion 29a is a drainage path that continues from the inner drain hole 23a. ing.

  As described above, the upper surface 21 of the metal lower frame 11a between the inner rail 23 and the outer rail 24 is formed in a downwardly inclined shape from the indoor side toward the outdoor side, and the communication flow path portion 29a of the drain bypass member 29 is also formed. Along this, it is formed in a downwardly inclined shape from the indoor side to the outdoor side. For this reason, water can be smoothly flowed toward the outdoor side.

  Between the upper surface 22a of the indoor recess 22 formed in the metal lower frame 11a and the upper surface 21 between the inner rail 23 and the outer rail 24, the height differs between the inside and outside with the inner rail 23 interposed, The upper surface 21 is formed to be lower. The step 23 c has a height equivalent to the thickness of the inner wall that forms the communication flow path portion 29 a of the drainage bypass member 29. Thereby, the upper surface 22a of the indoor recess 22 and the communication flow path portion 29a of the drain bypass member 29 can be configured as a continuous flow path, and drainage can be performed smoothly. Further, the step 23c may be formed to have a height larger than the thickness of the inner wall that forms the communication flow path portion 29a. In this case, since the communication flow path portion 29a is lower than the upper surface 22a of the indoor recess 22, smooth drainage can be similarly performed.

  The drainage bypass member 29 takes out the water flowing into the indoor concave portion 22 on the side where the inner shoji 2 is disposed by the communication flow path portion 29a to the outside of the inner rail 23 and drains it. Drainage is performed on the outdoor side from the inner rail 23 separating the outside, and smooth drainage can be performed while preventing rainwater and wind from blowing into the room.

  The drainage bypass member 29 drains the water from the indoor recess 22 to the outside of the outdoor rail 24, so that the outer rail 24 is formed with a bypass notch 24c through which the drainage bypass member 29 is inserted. Yes. The drainage bypass member 29 includes a vertical portion 29b that bends downward along the outer surface of the metal lower frame 11a on the outdoor side through which the bypass cutout 24c is inserted. A water outlet 29c is formed on the outer surface of the front end portion of the vertical portion 29b, from which water is finally drained. Further, as shown in FIG. 8, a check valve 29d is provided at the water outlet 29c to prevent backflow of rainwater and wind from the outdoor side.

  In this manner, the drain bypass member 29 is taken out to the outside of the outer rail 24, bent further downward, and drained at the lower end portion, so that the backflow of rain water and wind can be prevented more reliably. Further, an outer door contact block 28 is provided so as to cover the drain bypass member 29, and these are integrated, but the drain bypass member 29 and the outer door contact block 28 are formed as an integral part from the beginning. May be.

  Further, the drain bypass member 29 only needs to be formed so that at least the water outlet is taken out from the inner drain hole 23 a to the outdoor side, and may be up to the front of the outer rail 24 or in front of the outer rail 24. It may be bent in an L shape.

  Although the embodiment of the present invention has been described above, the application of the present invention is not limited to this embodiment, and can be applied in various ways within the scope of its technical idea.

DESCRIPTION OF SYMBOLS 1 Frame 2 Inner shoji 3 External shoji 4 Screen door 5 Housing 6 Glass body 10 Upper frame 11 Lower frame 11b Cover member 11c Indoor resin cover material 12 Vertical frame 20 Hollow part 21 Upper surface 22 Indoor recessed part 23 Inner rail 23a Inner drain hole 24 Outer rail 24a Outer drain hole 29 Drain bypass member 29a Communication flow path part 29b Vertical part 29c Water outlet 30 Upper surface covering part 31 Upper surface drain hole 32 Rising part 32a Space part 33 Air communication hole

Claims (8)

The internal and external shoji is placed in a frame formed by framing the upper and lower frames and the left and right vertical frames.
In the lower part of the inner rail of the lower frame, an inner drain hole is formed which constitutes a drainage path that communicates the inside and outside of the inner rail in a region where the inner shoji is arranged in a state where the inner and outer shoji is closed, A drainage bypass member that communicates with the inner drainage hole and guides water to the outdoor side is provided on the upper surface of the lower frame, and an end portion of the lower frame on the side where the inner and outer shojis are arranged with the inner and outer shojis closed. In the sash , a bypass notch is formed in the outer rail, and the drainage bypass member is inserted into the bypass notch .   The sash according to claim 1, wherein a concave indoor concave portion is formed on the indoor side of the inner rail, and an indoor resin cover material is provided so as to cover the indoor concave portion. The drain bypass member includes a communication flow path portion that becomes a flow path of water from the inner drain hole, and the upper surface of the indoor recess is formed at a position higher than the upper surface between the inner and outer rails of the lower frame, A step is formed inside and outside the inner rail, and the step has a height equivalent to a thickness of an inner wall constituting the communication flow path portion or a height larger than a thickness of the inner wall. 2. The sash according to 2 .   The upper surface between the inner and outer rails of the lower frame is formed in a downwardly inclined shape from the indoor side to the outdoor side, and the drain bypass member is formed in a downwardly inclined shape from the indoor side to the outdoor side along the upper surface between the inner and outer rails. The sash of any one of Claims 1-3 characterized by the above-mentioned.   The sash according to any one of claims 1 to 4, wherein a bypass notch for inserting the drainage bypass member is provided at a lower portion of the outer rail of the lower frame.   The sash according to claim 5, wherein the drainage bypass member includes a vertical portion that is bent downward outward from the bypass cutout portion, and a water outlet is provided at a tip portion of the vertical portion.   The sash according to any one of claims 1 to 6, wherein a check valve is provided at a water outlet of the drainage bypass member.   The sash according to any one of claims 1 to 7, wherein the drainage bypass member integrally includes an outer door abutment block that can be brought into contact with a lower end portion of the outer panel.

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