Outside wall structure of building

Abstract

To acquire an outside wall structure of building which can secure drainage performance in the building height direction and the horizontal direction, in the periphery of a sash.SOLUTION: On an outside wall 12 of a building 10, a first seal part 36 is arranged extending in the height direction along a gap between a corner outside wall material 32 and a sash frame. Also, a flow passage part 56 is constituted which includes an opening part 56A between a second seal part 40 and a mounting piece part 22 by a gap 38 between the corner outside wall material 32 and an upper surface part 24B of an outside window sill 24 and an upper end part of a general outside wall material 30 being closed by the second seal part 40 from the outdoor side, and this flow passage part 56 extends in the horizontal direction.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to an exterior wall structure of a building. [Background technology]

[0002] The following Patent Document 1 discloses an invention related to a drainage structure for a building. In this drainage structure for a building, a flow path is formed between the sash and the exterior wall material, extending in the building height direction. This flow path is covered from the outdoor side with an irregular sealant and a fixed sealant. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-120029 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, while the invention described in the above patent document takes into consideration drainage in the vertical direction of the building around the sash, it does not take into consideration drainage in the horizontal direction around the sash, and there is room for improvement in this regard.

[0005] In consideration of the above, an object of the present invention is to provide an exterior wall structure for a building that can ensure drainage performance in the vertical and horizontal directions of the building around the sashes. [Means for solving the problem]

[0006] The exterior wall structure of a building according to a first aspect comprises a pair of vertical frames arranged at intervals in the width direction of the exterior wall, the pair of vertical frames constituting a part of the framework of the exterior wall of the building and extending in the building height direction, the pair of vertical frames comprising a first mounting surface portion facing the outdoor side, and a second mounting surface portion extending from the first mounting surface portion to the indoor side, the pair of vertical frames comprising a mounting piece portion extending from the indoor side peripheral portion of the second mounting surface portion of one of the vertical frames towards the other of the vertical frames, the first horizontal frame constituting a part of the framework and spanning between the pair of vertical frames, the first horizontal frame comprising a third mounting surface portion facing the outdoor side, and a first upper surface portion extending horizontally between the one second mounting surface portion and the other second mounting surface portion, the first horizontal frame being arranged on the indoor side of the first horizontal frame, the first upper surface portion extending along the first horizontal frame and lower than the first upper surface portion. the corner exterior wall material is arranged in a state in which a first gap is formed between the second wall portion and the sash frame, and a second gap is formed between the lower ends of the first wall portion and the second wall portion and the upper ends of the first upper surface portion and the general exterior wall material; a first horizontal frame having a second upper surface portion located above in the height direction; a sash having a sash frame supported against the mounting piece portion and the second upper surface portion; a general exterior wall material arranged along the first mounting surface portion and the third mounting surface portion with the first upper surface portion as an upper limit; a first wall portion arranged along the first mounting surface portion and a second wall portion arranged along the second mounting surface portion, wherein a first gap is formed between the second wall portion and the sash frame, and a second gap is formed between the lower ends of the first wall portion and the second wall portion and the upper ends of the first upper surface portion and the general exterior wall material; a first seal portion arranged along the first gap and extending in the height direction; and a second seal portion that blocks the second gap from the outdoor side, thereby forming a flow path portion with an opening between the mounting piece portion and the corner exterior wall material.

[0007] In the exterior wall structure of a building according to the first aspect, a part of the framework of the exterior wall of the building is constituted by a pair of vertical frames extending in the building height direction (hereinafter simply referred to as the height direction), and these vertical frames are arranged at an interval in the width direction of the exterior wall. These vertical frames have a first mounting surface portion facing the outdoor side, and a second mounting surface portion extending from the first mounting surface portion to the indoor side.

[0008] In addition, an attachment piece portion is provided integrally or one-piece with the vertical frames, and this attachment piece portion extends from the indoor side peripheral portion of the second mounting surface portion of one vertical frame toward the other vertical frame.

[0009] The exterior wall framework includes a first horizontal frame. The first horizontal frame is stretched across the pair of vertical frames and includes a third mounting surface portion facing the exterior and a first upper surface portion extending horizontally between one second mounting surface portion and the other second mounting surface portion. The mounting piece portion and the first upper surface portion support a sash frame of the sash.

[0010] Meanwhile, a general exterior building material is disposed along the first mounting surface portion of the vertical frame and the third mounting surface portion of the first horizontal frame with the first upper surface portion as its upper limit.

[0011] Also arranged on the vertical frame is a corner exterior wall material having a first wall portion and a second wall portion. More specifically, the first wall portion is arranged along the first mounting surface portion, and the second wall portion is arranged along the second mounting surface portion. A first gap is formed between the second wall portion and the sash frame, and a second gap is formed between the lower ends of the first and second wall portions and the upper end of the first upper surface portion and the general exterior wall material.

[0012] In this embodiment, the first seal portion is disposed along the first gap and extends in the height direction, and the second gap is closed from the outdoor side by the second seal portion, thereby forming a flow path portion having an opening between the second seal portion and the mounting piece portion, and this flow path portion extends in the horizontal direction.

[0013] Therefore, in this embodiment, rainwater can flow in the vertical direction along the first seal portion during rainy weather, etc. Also, the rainwater that has flowed along the first seal portion can be drained in the horizontal direction by the flow path portion.

[0014] The building exterior wall structure of the second aspect is the building exterior wall structure of the first aspect, wherein the first sealing portion is a dry sealing material having a cavity portion extending in the height direction.

[0015] In the exterior wall structure of the building according to the second aspect, the first seal part is made of a dry sealant, and the cavity extending in the height direction can secure a flow path for rainwater flowing in the height direction. Also, compared to a structure in which the first seal part is made of a wet sealant, the damage to the appearance of the building can be suppressed.

[0016] The exterior wall structure of a building in the third aspect is the exterior wall structure of the building in the second aspect, wherein the second sealing portion is made of a wet sealing material and includes a main body portion that constitutes part of the flow path portion, and a blocking portion that protrudes from the main body portion along the first upper surface portion and to the opposite side to the corner exterior wall material and is located on the outdoor side of the opening.

[0017] In the building exterior wall structure of the third aspect, the second sealing portion is made of a wet sealing material, and a part of the flow path portion is formed by positioning the main body portion so as to follow the shape of the second gap.

[0018] However, when rainwater and strong winds are blown toward the sash due to a typhoon or the like, the rainwater may accumulate on the first upper surface portion of the first horizontal frame, and may eventually seep into the opening of the flow path portion.

[0019] In this embodiment, the second seal portion includes a blocking portion that protrudes from the main body portion along the first upper surface portion and toward the opposite side to the corner exterior wall material, and is located on the outdoor side of the opening of the flow path portion. Therefore, even if rainwater is sprayed toward the sash, the blocking portion blocks the rainwater, and the rainwater that has accumulated on the first upper surface portion can be prevented from entering the opening of the flow path portion.

[0020] A fourth aspect of the building exterior wall structure is the building exterior wall structure of the third aspect, in which the first seal portion and the blocking portion overlap when viewed from the height direction.

[0021] In the exterior wall structure of a building according to the fourth aspect, the first seal portion and the blocking portion of the second seal portion overlap when viewed in the height direction. Therefore, in this aspect, the water flowing from the first seal portion is branched by the blocking portion to the indoor side and the outdoor side, and excessive inflow of water into the indoor side of the blocking portion, i.e., the opening side of the flow path portion, can be suppressed. Effect of the Invention

[0022] As described above, the building exterior wall structure according to the present invention has the excellent effect of ensuring drainage performance in the building height direction and horizontally around the sashes. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a perspective view showing a schematic configuration of an exterior wall to which the exterior wall structure of a building according to this embodiment is applied. [Diagram 2] 1 is a perspective view showing a schematic configuration of an upper layer of a waterproof structure in an exterior wall to which the exterior wall structure of a building according to this embodiment is applied. FIG. [Diagram 3] 1 is a perspective view showing a schematic configuration of the lower layer of a waterproof structure in an exterior wall to which the exterior wall structure of a building according to this embodiment is applied. FIG. [Figure 4] 1 is a perspective view showing a schematic state when a second seal portion is not disposed in a main part of an exterior wall to which the exterior wall structure of a building according to this embodiment is applied. FIG. [Diagram 5] FIG. 2 is a perspective view showing a schematic configuration of a main part of an exterior wall to which the exterior wall structure of a building according to the present embodiment is applied. [Figure 6] FIG. 2 is a front view showing a schematic configuration of a main part of an exterior wall to which the exterior wall structure of a building according to the present embodiment is applied. [Figure 7]7 is a cross-sectional view (a cross-sectional view showing a state cut along line 7-7 in FIG. 6) that shows a schematic configuration of a main part of an exterior wall to which the exterior wall structure of a building according to this embodiment is applied. FIG. [Figure 8] 1 is a cross-sectional view showing a schematic configuration of a lower portion of a sash in an exterior wall to which the exterior wall structure of a building according to this embodiment is applied. FIG. [Figure 9] FIG. 1 is a front view showing a schematic overall configuration of an exterior wall to which the exterior wall structure of a building according to this embodiment is applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] An example of an embodiment of the exterior wall structure of a building according to the present invention will be described below with reference to Figures 1 to 9. In the following, the longitudinal direction, i.e., the girder direction, of a "building 10" to which the exterior wall structure of a building according to this embodiment is applied will be referred to as the X direction, the lateral direction, i.e., the beam direction, of the building 10 will be referred to as the Y direction, and the building height direction will be referred to as the Z direction. In each figure, one side of the X direction is indicated by an arrow X, one side of the Y direction (the outdoor side) is indicated by an arrow Y, and one side of the Z direction (the upper side in the building height direction) is indicated by an arrow Z.

[0025] 9, a "sash 14" is disposed on an "exterior wall 12" of a building 10, and this sash 14 is so-called inset, located on the indoor side with respect to a wall surface 12A of the exterior wall 12. The sash 14 is supported by a "sash frame 16" with its thickness direction set in the Y direction, and the sash frame 16 is supported by an exterior wall frame 18 that constitutes the framework of the exterior wall 12.

[0026] 2 and 8, the exterior wall frame 18 is configured by combining, in a ladder shape, a pair of vertical frames (vertical bars 20, mounting pieces 22), a first horizontal frame (outer window sill 24), a second horizontal frame (inner window sill 26), and outer and inner lintels (not shown) whose longitudinal direction is the Z direction when viewed from the Y direction. In other words, the width direction of the exterior wall frame 18 (hereinafter simply referred to as the width direction) coincides with the X direction, and the height direction of the exterior wall frame 18 coincides with the Z direction.

[0027] Specifically, the vertical bars 20 are spaced apart from each other in the X direction and form the widthwise outer portions of the exterior wall frame 18. The vertical bars 20 extend in the Z direction and include an "attachment surface portion 20A" as a first attachment surface portion facing one side in the Y direction, and an "attachment surface portion 20B" as a second attachment surface portion extending from a widthwise inner peripheral portion of the attachment surface portion 20A to the other side in the Y direction.

[0028] The mounting piece portion 22 extends inward in the width direction from the peripheral edge portion on the other side of the mounting surface portion 20B in the Y direction, with the plate thickness direction being the Y direction. The mounting piece portion 22 may be provided integrally with the vertical bar 20, or may be attached to the vertical bar 20 via an attachment member, a joint, or the like.

[0029] The outer window sill 24 constitutes the other side of the exterior wall frame 18 in the Z direction and extends in the X direction. The outer window sill 24 is hung between a pair of vertical bars 20 and has an "attachment surface portion 24A" as a third attachment surface portion facing one side in the Y direction, and an "upper surface portion 24B" as a first upper surface portion extending horizontally.

[0030] The inner window sill 26 is positioned on the other side of the outer window sill 24 in the Y direction, extends in the X direction along the outer window sill 24, and has an "upper surface portion 26A" as a second upper surface portion located on one side in the Z direction of the upper surface portion 24B of the outer window sill 24.

[0031] The outer lintel is configured symmetrically with the outer window sill 24, and the inner lintel is configured symmetrically with the inner window sill 26 in the Z direction, and these constitute one side of the exterior wall frame 18 in the Z direction.

[0032] The sash frame 16 is attached to the pair of mounting pieces 22 of the exterior wall frame 18 constructed as described above, the upper surface 26A of the inner window sill 26, and the lower surface of the inner lintel by mounting members (not shown).

[0033] As shown in FIGS. 1 and 4, a "general exterior wall material 30" is arranged relative to the vertical beams 20 and the outer window sill 24, and a "corner exterior wall material 32" is arranged relative to the vertical beams 20.

[0034] In detail, the general exterior wall material 30 is mainly composed of ceramic siding, has a rectangular plate shape with the X direction as viewed from the Y direction, and is arranged along the mounting surface 20A of the vertical rail 20 and the mounting surface 24A of the outer window sill 24. This general exterior wall material 30 is arranged so that the peripheral portion on one side in the Z direction as viewed from the Y direction coincides with the upper surface 24B of the outer window sill 24, in other words with the upper surface 24B as the upper limit, and is attached to the mounting surface 20A and the mounting surface 24A with mounting members not shown.

[0035] On the other hand, the corner exterior wall material 32 is mainly composed of ceramic siding, extends in the Z direction as a whole, and includes a "first wall portion 32A" arranged along the mounting surface portion 20A and a "second wall portion 32B" arranged along the mounting surface portion 20B, forming an L-shaped plate when viewed from the Z direction. The corner exterior wall material 32 is attached to the mounting surface portions 20A and 20B with mounting members (not shown).

[0036] Here, in this embodiment, as shown in Figs. 4 and 5, a "first seal portion 36" is arranged in a "gap 34" as a first gap formed between the end portion on the other side of the Y direction of the second wall portion 32B and the sash frame 16. Also, a "second seal portion 40" is arranged in a "gap 38" as a second gap formed by combining a gap formed between the lower end portion of the first wall portion 32A and the upper end portion of the general exterior building material 30 and a gap formed between the lower end portion of the second wall portion 32B and the upper surface portion 24B of the outer window sill 24. And, this embodiment is characterized in that a waterproof structure is formed around the sash 14, including the first seal portion 36 and the second seal portion 40. The configuration of this waterproof structure will be described in detail below.

[0037] As shown in Figures 2 and 3, the waterproof structure of this embodiment uses butyl tape 42, a lower waterproof sheet 44, an upper waterproof sheet 46, a lower aluminum tape 48, an upper aluminum tape 50, a lower sealing material 52 and an upper sealing material 54.

[0038] In detail, the butyl tape 42 is in the form of a band extending in the X direction with its thickness direction being the Y direction, and is attached to one side in the Z direction of the outer side surface portion 26B on one side of the Y direction of the inner window sill 26, further to the upper surface portion 24B of the outer window sill 24.

[0039] The lower waterproof sheet 44 is configured to include a flat portion 44A, a rising portion 44B, and a hanging portion 44C. More specifically, the flat portion 44A is disposed along the upper surface portion 24B of the outer window sill 24, with the thickness direction being the Z direction. The rising portion 44B extends from the peripheral portion of the flat portion 44A on the other side of the Y direction to one side in the Z direction, and is disposed along the butyl tape 42 and the mounting piece portion 22. The hanging portion 44C extends from the peripheral portion of the flat portion 44A on one side in the Y direction to the other side in the Z direction, and is disposed along the mounting surface portion 24A of the outer window sill 24.

[0040] The lower waterproof sheet 44 is arranged at a predetermined distance in the X direction from the vertical bars 20, and is joined to the upper surface 24B of the outer window sill 24 at a joint (not shown) made of adhesive or the like.

[0041] The upper waterproof sheet 46 is configured to include a flat portion 46A, a first rising portion 46B, a second rising portion 46C, and an outer piece portion 46D. In detail, the flat portion 46A has its thickness direction set in the Z direction and is disposed along the upper surface portion 24B of the outer window sill 24, with its outer end in the width direction reaching the vertical bar 20 and its inner portion in the width direction overlapping the flat portion 44A from one side in the Z direction.

[0042] The first rising portion 46B extends from the peripheral edge of the flat portion 46A on the other side in the Y direction to one side in the Z direction and is disposed along the rising portion 44B.

[0043] On the other hand, the second rising portion 46C extends from the outer peripheral edge of the flat portion 46A in the width direction to one side in the Z direction and is disposed along the mounting surface portion 20B of the vertical crosspiece 20. The first rising portion 46B and the second rising portion 46C abut against each other at the boundary (corner) between the mounting surface portion 20B and the mounting piece portion 22.

[0044] The outer piece 46D extends in the X direction with its thickness direction being the Y direction, and is disposed along the mounting surface 24A of the outer window sill 24 and the mounting surface 20A of the vertical rail 20. The periphery of the outer piece 46D on the inner side in the width direction and on one side in the Z direction is aligned with the periphery of the flat portion 46A on one side in the Y direction and the periphery of the second rising portion 46C on one side in the Y direction.

[0045] The lower aluminum tape 48 extends in the X direction and is positioned along the boundary, i.e., the corner, between the mounting surface portion 24A and the upper surface portion 24B of the outer window sill 24, and is attached from the upper side of the lower waterproof sheet 44 and the upper waterproof sheet 46.

[0046] The upper aluminum tape 50 is arranged along the upper surface 24B of the outer window sill 24 with its thickness direction set as the Z direction, with a portion of one side in the Y direction being attached from above the lower aluminum tape 48, and the remaining portion being attached from above the lower waterproof sheet 44 and the upper waterproof sheet 46. A predetermined gap is provided between the outer ends of the lower aluminum tape 48 and the upper aluminum tape 50 in the width direction and the mounting surface 20B of the vertical bar 20. In other words, the upper waterproof sheet 46 is not covered by the lower aluminum tape 48 and the upper aluminum tape 50 between the lower aluminum tape 48 and the upper aluminum tape 50 and the vertical bar 20.

[0047] The lower sealant 52 is made of EPT SEALER (registered trademark) or the like, and is in the form of a strip extending in the X direction with its thickness direction being the Y direction, and is attached from one side in the Y direction of the lower aluminum tape 48 and the upper waterproof sheet 46 along the mounting surface 24A of the outer window sill 24. When viewed from the Y direction, the position of the upper edge of the lower sealant 52 coincides with the position of the upper surface 24B of the outer window sill 24.

[0048] The upper sealing material 54 is basically configured in the same manner as the lower sealing material 52, and is attached to the rising portion 44B of the lower waterproof sheet 44, and the first rising portion 46B, the second rising portion 46C, and the outer piece portion 46D of the upper waterproof sheet 46. When viewed from the Y direction, the position of the lower edge of the upper sealing material 54 coincides with the position of the upper edge of the lower sealing material 52.

[0049] On the other hand, as shown in FIG. 7, the first sealing portion 36 is a dry sealing material having a “hollow portion 36A” extending in the height direction, and the first sealing portion 36 may be, for example, a gasket.

[0050] As described above, the first seal portion 36 is disposed in the gap 34, and is thereby in close contact with the corner exterior wall material 32 and the sash frame 16. The first seal portion 36 is capable of discharging rainwater, etc., blown onto one side of the sash 14 in the Z direction, to the other side in the Z direction through the hollow portion 36A.

[0051] The second seal portion 40 is made of a wet seal material such as a sealing material, and as shown in FIG. 5, includes a "main body portion 40A" and a "blocking portion 40B."

[0052] More specifically, the main body 40A is embedded in the gap 38 described above, and is in close contact with the lower end of the corner exterior wall material 32, the upper end of the general exterior wall material 30, and the outer widthwise portion of the upper waterproof sheet 46, with a specified distance between the upper sealant 54. A "flow path 56" extending horizontally is defined between the upper sealant 54 and the main body 40A.

[0053] Moreover, one "opening 56A" of the flow path portion 56 is formed between the second seal portion 40 and a portion of the upper seal material 54 that is affixed to the mounting piece portion 22. The other opening (not shown) of the flow path portion 56 opens into a flow path portion (not shown) provided on the other side in the Y direction of the seal portion 60 that is arranged between the corner exterior wall material 32 and an exterior wall material 58 that is arranged adjacent to the corner exterior wall material 32 in the X direction (see FIG. 9).

[0054] On the other hand, the blocking portion 40B protrudes widthwise inward from the other side in the Y direction of the main body 40A along the upper surface 24B of the outer window sill 24, and is located on one side in the Y direction of the opening 56A when viewed from the X direction, as shown in Fig. 7. Also, at least a portion of the blocking portion 40B overlaps with the first seal portion 36 and, by extension, the hollow portion 36A of the first seal portion 36 when viewed from the Z direction.

[0055] As shown in Fig. 8, a drip edge 62 attached to the sash frame 16 is disposed on one side in the Z direction of the outer window sill 24 and the general exterior building material 30. The drip edge 62 covers the main parts of the components of the waterproof structure according to this embodiment, except for the first seal portion 36 and the second seal portion 40, from one side in the Z direction.

[0056] <Actions and Effects of the Present Embodiment> Next, the operation and effects of this embodiment will be described.

[0057] 1 and 2, in this embodiment, a pair of vertical bars 20 extending in the Z direction constitute part of the framework of the exterior wall 12 of the building 10, and these vertical bars 20 are arranged at intervals in the width direction. Each vertical bar 20 has a mounting surface portion 20A facing one side in the Y direction, and a mounting surface portion 20B extending from the mounting surface portion 20A to the other side in the Y direction.

[0058] In addition, an attachment piece portion 22 is provided integrally or one-piece with the vertical bars 20, and this attachment piece portion 22 extends from the peripheral portion on the other side of the Y direction of the attachment surface portion 20B of one vertical bar 20 toward the other vertical bar 20.

[0059] The framework of the exterior wall 12 also includes an outer window sill 24. The outer window sill 24 is suspended between a pair of vertical bars 20 and includes an attachment surface portion 24A facing one side in the Y direction and an upper surface portion 24B extending horizontally between the one attachment surface portion 20B and the other attachment surface portion 20B. The attachment piece portion 22 and the upper surface portion 24B support the sash frame 16 of the sash 14.

[0060] On the other hand, as shown in FIG. 4, a general exterior building material 30 is arranged along the mounting surface portion 20A of the vertical rail 20 and the mounting surface portion 24A of the outer window sill 24 with the upper surface portion 24B as an upper limit.

[0061] Also, a corner exterior building material 32 having a first wall portion 32A and a second wall portion 32B is arranged on the vertical beam 20. More specifically, the first wall portion 32A is arranged along the mounting surface portion 20A, and the second wall portion 32B is arranged along the mounting surface portion 20B. As shown in FIG. 6, a gap 34 is formed between the second wall portion 32B and the sash frame 16, and a gap 38 is formed between the lower ends of the first wall portion 32A and the second wall portion 32B and the upper end portion of the upper surface portion 24B and the general exterior building material 30.

[0062] In this embodiment, the first seal portion 36 extending in the height direction is disposed along the gap 34. As also shown in Fig. 7, the gap 38 is closed from the outdoor side by the second seal portion 40, thereby forming a flow path portion 56 having an opening portion 56A between the second seal portion 40 and the mounting piece portion 22, and this flow path portion 56 extends in the horizontal direction.

[0063] Therefore, in this embodiment, during rainy weather, rainwater can flow in the vertical direction along the first seal portion 36. In addition, the rainwater that has flowed along the first seal portion 36 can be drained in the horizontal direction by the flow path portion 56.

[0064] In this embodiment, the first seal portion 36 is a dry seal material, and the cavity portion 36A extending in the Z direction can ensure a flow path for rainwater flowing in the Z direction. In addition, damage to the appearance of the building 10 can be suppressed compared to a configuration in which the first seal portion 36 is made of a wet seal material.

[0065] In this embodiment, the second seal portion 40 is made of a wet sealant, and a part of the flow path portion 56 is formed by arranging the main body portion 40A so as to follow the shape of the gap .

[0066] Incidentally, when rainwater and strong winds are blown toward the sash 14 due to a typhoon or the like, the rainwater may accumulate on the upper surface 24B of the outer window sill 24, and may eventually seep into the opening 56A of the flow path portion 56.

[0067] Here, in this embodiment, the second seal portion 40 is equipped with a blocking portion 40B, which protrudes from the main body portion 40A along the upper surface portion 24B and to the side opposite the corner exterior wall material 32, and is located on one side in the Y direction of the opening 56A of the flow path portion 56. Therefore, even if rainwater is sprayed toward the sash 14, the rainwater is blocked by the blocking portion 40B, and the rainwater accumulated on the upper surface portion 24B can be prevented from entering the opening 56A of the flow path portion 56.

[0068] In addition, in this embodiment, the first seal portion 36 and the blocking portion 40B of the second seal portion 40 overlap when viewed from the Z direction. For this reason, in this embodiment, the water flowing from the first seal portion 36 is branched by the blocking portion 40B to one side in the Y direction and the other side in the Y direction, and excessive inflow of water to the other side in the Y direction of the blocking portion 40B, i.e., the opening 56A side of the flow path portion 56, can be suppressed.

[0069] As described above, in the exterior wall structure of a building according to this embodiment, drainage performance can be ensured around the sashes 14 in the height direction and horizontal direction of the building.

[0070] <Supplementary explanation of the above embodiment> (1) In the above-described embodiment, there is no particular limitation on the materials of the components of the exterior wall frame 18, such as the vertical bars 20. However, it is possible to appropriately use steel materials such as channel steel and wooden beams as materials for the components of the exterior wall frame 18.

[0071] (2) In the above embodiment, a gasket is used for the first seal portion 36. However, depending on the specifications of the building 10, a sealing material may be used for the first seal portion 36. Also, depending on the specifications of the building 10, a configuration may be adopted in which the second seal portion 40 does not include the blocking portion 40B. [Explanation of symbols]

[0072] 10. Building 12 Exterior Wall 14 Sash 16 Sash frame 20 Vertical bars (vertical frames) 20A Mounting surface part (1st mounting surface part) 20B Mounting surface part (second mounting surface part) 22 Mounting piece 24 Outer window sill (first horizontal frame) 24A Mounting surface part (3rd mounting surface part) 24B Top part (first top part) 26 Inner window sill (second horizontal frame) 26A Top part (second top part) 30 General exterior wall materials 32 Corner exterior wall material 32A 1st wall section 32B 2nd wall section 34 Gap (First Gap) 36 First seal part 36A Cavity 38 Gap (Second Gap) 40 Second seal part 40A Main unit 40B Blocking section 56 Flow path section 56A opening

Claims

1. A pair of vertical frames that form part of the framework of an exterior wall of a building, extend in the height direction of the building, and include a first mounting surface portion facing the exterior side, and a second mounting surface portion extending from the first mounting surface portion to the interior side, and are arranged at an interval in the width direction of the exterior wall; An attachment piece portion that is integral with or provided integrally with the vertical frame and extends from an indoor side peripheral portion of the second attachment surface portion of one of the vertical frames toward the other vertical frame; a first horizontal frame that constitutes a part of the framework and is spanned between the pair of vertical frames, the first horizontal frame including a third mounting surface portion facing the outdoors and a first upper surface portion extending horizontally between one of the second mounting surface portions and the other of the second mounting surface portions; a second horizontal frame including a second upper surface portion disposed on an indoor side of the first horizontal frame, extending along the first horizontal frame, and positioned higher in the height direction than the first upper surface portion; a sash including a sash frame supported on the mounting piece portion and the second upper surface portion; A general exterior wall material arranged along the first mounting surface portion and the third mounting surface portion with the first upper surface portion as an upper limit; a corner exterior wall material comprising a first wall portion disposed along the first mounting surface portion and a second wall portion disposed along the second mounting surface portion, with a first gap being formed between the second wall portion and the sash frame, and a second gap being formed between lower ends of the first wall portion and the second wall portion and upper ends of the first upper surface portion and the general exterior wall material; a first seal portion disposed along the first gap and extending in the height direction; a second seal portion that configures a flow path portion having an opening between the second wall portion and the mounting piece portion by closing the second gap from the outdoor side; The exterior wall structure of a building having the above structure.

2. The first seal portion is a dry seal material having a cavity portion extending in the height direction. The exterior wall structure of a building according to claim 1.

3. The second seal portion is made of a wet seal material, The corner wall material is provided on the outer wall surface of the corner passage portion. The corner wall material is provided on the outer wall surface of the corner passage portion. The corner wall material is provided on the outer wall surface of the corner passage portion. The exterior wall structure of a building according to claim 2.

4. The first seal portion and the blocking portion overlap when viewed from the height direction. 、 The exterior wall structure of a building according to claim 3.

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