Water-stopping structure and water-stopping method

Abstract

This prevents water from seeping inside the exterior material through the beam members that can project outwards to the outside. [Solution] The watertight structure comprises the building's frame (column 12), exterior material 20 positioned on the outside of the frame, beam member 14 fixed to the frame and projecting outwards through through-holes 20H in the exterior material 20, waterproof sheet 30 inserted into the gap between the hole wall of the through-hole 20H and the beam member 14, and retaining members 32 and 34 on the inside of the exterior material 20 that hold one end of the waterproof sheet 30 between themselves and the exterior material 20.

Description

Technical Field

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[0001] The present invention relates to a water stop structure and a water stop method.

Background Art

[0002] In Patent Document 1 below, a configuration is shown in which a bracket fixed to a column is inserted into an opening of an exterior material, and a base end portion of a beam member is fixed to the bracket on the outside of the exterior material. This configuration has a waterproof structure. In this waterproof structure, a butyl tape covering the opening of the exterior material is fixed to the exterior material to prevent water from entering the indoor side.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the configuration shown in Patent Document 1 above, the base end portion of the beam member is provided outside the exterior material. On the other hand, there are cases where the base end portion of the beam member is provided inside the exterior material, that is, where the beam member that has jumped out to the outdoor side penetrates the exterior material.

[0005] The present disclosure provides a water stop structure and a water stop method that suppress water from entering the inside of the exterior material through which a beam member that has jumped out to the outdoor side penetrates, in consideration of the above facts.

Means for Solving the Problems

[0006] The first embodiment of the water-stopping structure comprises a building frame, an exterior material disposed on the outside of the frame, a beam member fixed to the frame and projecting outwards through a through-hole in the exterior material, a waterproof sheet inserted into the gap between the wall of the through-hole and the beam member, and a retaining member on the inside of the exterior material that holds one end of the waterproof sheet between itself and the exterior material.

[0007] In the first embodiment of the watertight structure, a waterproof sheet is inserted into the gap between the hole wall of a through-hole formed in the exterior material and the beam member. One end of this waterproof sheet is held in place on the inside of the exterior material, sandwiched between the exterior material and a retaining member.

[0008] Therefore, it is possible to prevent water from seeping in from the outside of the waterproof sheet (outside from the beam member) to the inside of the exterior material. This prevents water from seeping in to the inside of the exterior material through which the beam member that protrudes outwards penetrates.

[0009] The second embodiment of the waterproofing structure is the same as the first embodiment, but the beam members are provided in multiples and connected by horizontal members, the through holes are formed between the multiple beam members, and the waterproof sheet is fixed to the beam members and the horizontal members.

[0010] In the second embodiment of the watertight structure, multiple beam members are connected by horizontal members, and a waterproof sheet is fixed to these beam members and horizontal members. This prevents water from seeping in from the gaps between the beam members and the waterproof sheet, and between the horizontal members and the waterproof sheet, into the interior of the exterior material.

[0011] The third embodiment of the water-stopping method involves bringing in the exterior material, with the waterproof sheet and the retaining material assembled according to the first or second embodiment, and fixing it to the structure, and passing the beam member through the through hole and fixing it to the structure.

[0012] In the third embodiment of the waterproofing method, the exterior material, the retaining material, and the waterproof sheet are unitized. This reduces on-site work compared to assembling them on-site. [Effects of the Invention]

[0013] According to this disclosure, it is possible to prevent water from seeping into the interior of the exterior material through which the beam member that can be projected outwards can penetrate. [Brief explanation of the drawing]

[0014] [Figure 1] This is a partial perspective view of a building to which a watertight structure according to the embodiment of this disclosure is applied. [Figure 2] This is a plan view showing a water-stopping structure according to an embodiment of the present disclosure. [Figure 3] (A) is a cross-sectional view along line AA in Figure 2, and (B) is a cross-sectional view along line BB in Figure 2. [Figure 4] This is a partially enlarged perspective view showing a water-stopping structure according to an embodiment of the present disclosure. [Figure 5] (A) is a perspective view showing a modified example of the waterproof sheet according to the embodiment of this disclosure, and (B) is a perspective view showing another modified example. [Figure 6] This is a plan view showing a modified example of a through hole according to the embodiment of the present disclosure. [Modes for carrying out the invention]

[0015] Hereinafter, a water-stopping structure and water-stopping method according to the embodiments of this disclosure will be described with reference to the drawings. Components indicated by the same reference numerals in each drawing are considered to be the same component. However, unless otherwise specified in the specification, each component is not limited to one, and there may be multiple such components.

[0016] Furthermore, explanations of redundant components and reference numerals in each drawing may be omitted. This disclosure is not limited to the following embodiments, and modifications can be made as appropriate within the scope of the purpose of this disclosure, such as omitting components, substituting them with different components, or combining one embodiment with various modifications.

[0017] In each drawing, the directions indicated by the arrows X and Y are directions along the horizontal plane and are perpendicular to each other. Also, the direction indicated by the arrow Z is the direction along the vertical direction (up and down direction). In each drawing, the directions indicated by the arrows X, Y, and Z are considered to be the same as each other.

[0018] <Building> FIG. 1 shows a building 10 to which the water-stopping structure and water-stopping method according to an embodiment of the present disclosure are applied. In the building 10, an exterior finishing material 20 is disposed outside a column 12 as a building frame. The column 12 is a column made of a rectangular steel pipe arranged along the outer periphery of the building 10. The exterior finishing material 20 is an outer wall finishing material provided along the direction in which the columns 12 are arranged (the X direction in FIG. 1).

[0019] A beam member 14 is fixed to the column 12. The beam member 14 is a channel member that projects outward from the outdoor side of the building 10 (the Y direction in FIG. 1). A plurality of beam members 14 are provided. In the example shown in FIG. 1, the base ends of two adjacent beam members 14 are respectively fixed to two adjacent columns 12. The number of beam members 14 is not particularly limited and can be appropriately determined as needed.

[0020] The beam member 14 is, for example, a cantilever beam, and the eaves and balconies of the building are supported by this beam member 14. Also, the beam member 14 can form a second floor portion that projects from the first floor portion of the building 10. Note that the beam member 14 may be fixed to the frame of the column 12, such as a beam 18 spanned across the column 12.

[0021] A purlin 16 as a transverse member is spanned along the exterior finishing material 20 on the beam member 14. In other words, adjacent beam members 14 are connected by the purlin 16. The purlin 16 is formed of an angle material.

[0022] The exterior finishing material 20 is formed of, for example, siding or the like. A through hole 20H through which the beam member 14 passes is formed in the exterior finishing material 20. The through hole 20H is formed across between two beam members 14 so that the two beam members 14 can be inserted therethrough. Note that the upper end of the through hole 20H is not shown in the drawing.

[0023] A soffit material 22 is provided below the beam member 14. In addition, wing wall materials 24 are provided at both ends of the beam member 14 and the soffit material 22, rising above the soffit material 22. The installation range (height) of the wing wall materials 24 is appropriately determined depending on the object being constructed, such as an eaves, balcony, or second floor.

[0024] The beam member 14, the secondary beam 16, and the through-hole 20H are located in a concealed space V, which is hidden by the soffit material 22, the wing wall material 24, and the floor material installed above the beam member 14. In the event of strong winds and rain, such as during a typhoon, wind may blow upwards at the inner corner between the soffit material 22 and the exterior material 20, as indicated by the arrow W in Figure 1, and rainwater carried by the upward-blowing wind may seep into the concealed space V.

[0025] Therefore, in the waterproofing structure and waterproofing method according to the embodiment of this disclosure, it is necessary to prevent such rainwater from further penetrating into the interior of the exterior material 20 through the through-hole 20H.

[0026] In this embodiment, the configuration in which the columns 12, beam members 14, and secondary beams 16 are made of steel is described, but these members may also be made of wood or concrete. In other words, this disclosure can be applied to buildings of various structural types, such as steel frame construction, wooden construction, and reinforced concrete construction.

[0027] <Waterproof structure> Figure 2 shows a beam member 14 fixed to a column 12, positioned to pass through a through-hole 20H in the exterior material 20. As shown in this figure, a waterproof sheet 30 is inserted through the through-hole 20H.

[0028] The waterproof sheet 30 is an airtight sheet material formed using butyl rubber or the like. In a plan view, the waterproof sheet 30 is inserted into the gap between the hole wall of the through hole 20H and the beam member 14. The end portion 30A of the waterproof sheet 30 is folded back on the exterior material 20 side on the outside of the beam member 14.

[0029] A retaining member 32 is positioned inside the exterior material 20. The retaining member 32 is made of steel material such as an angle material, and its longitudinal direction is positioned along the edge of the through hole 20H that runs in the vertical direction. The end 30A of the waterproof sheet 30 is held in place by being sandwiched between the retaining member 32 and the exterior material 20.

[0030] On the other hand, in the waterproof sheet 30, the portion 30B that is located on the outside of the exterior material 20 is bonded to the beam member 14.

[0031] As shown in Figure 3(A), in the elevation view as well, the waterproof sheet 30 is inserted into the gap between the hole wall of the through hole 20H and the beam member 14. The end portion 30C of the waterproof sheet 30 is folded back on the inside of the exterior material 20, towards the exterior material 20 side below the beam member 14.

[0032] A retaining member 34 is positioned inside the exterior material 20. The retaining member 34 is made of steel material such as an angle material, and its longitudinal direction is positioned along the edge of the through hole 20H that runs horizontally. The end 30C of the waterproof sheet 30 is held in place by being sandwiched between the retaining member 34 and the exterior material 20.

[0033] On the other hand, in the waterproof sheet 30, the portion 30D that is positioned on the outside of the exterior material 20 is bonded to the joist 16.

[0034] Furthermore, at the ends 30A and 30C of the waterproof sheet 30, which is placed inside the exterior material 20, a flexible member (not shown) such as ethylene propylene rubber (EPDM) may be placed on top of the waterproof sheet 30.

[0035] This improves watertightness between the retaining material 32 and the exterior material 20 compared to when a flexible member is not used. Furthermore, when a flexible member is used, the waterproof sheet 30 can be made of a relatively rigid material such as polyvinyl chloride.

[0036] Figure 3(B) shows the end of the waterproof sheet 30 as viewed from a direction along the axial direction of the beam member 14. As shown in this figure, the waterproof sheet 30 is arranged in a roughly "U" shape to cover the two beams from below and is inserted into the through hole 20H from below and the side.

[0037] In other words, the waterproof sheet 30 is not positioned above the beam member 14 and is not inserted from above the through hole 20H. This is because, as mentioned above, the purpose of the waterproof sheet 30 is to stop rainwater carried by the wind blown upwards, as shown by the arrow W in Figure 1.

[0038] <Water stoppage method> To form the above-described waterproof structure, for example, the exterior material 20, with the waterproof sheet 30 and the retaining members 32 and 34 assembled, can be manufactured in a factory and transported to the site. The retaining members 32 and 34 also serve as base materials for the exterior material 20, and are connected to other base materials or fixed to the structure of the building 10.

[0039] In this way, by using the same fasteners 32 and 34 for fixing the waterproof sheet 30 and the same material for the base of the exterior material 20, the number of building components 10 can be reduced compared to when these are provided separately. Furthermore, because the exterior material 20, fasteners 32 and 34 and the waterproof sheet 30 are unitized, on-site work can be reduced compared to when these are assembled on-site.

[0040] The waterproof sheet 30, the retaining members 32 and 34, and the exterior material 20 may be assembled on-site. In this case, the retaining members 32 and 34 are fixed to the building frame 10, and the waterproof sheet 30 is sandwiched between the retaining members 32 and 34 while the exterior material 20 is fixed to the retaining members 32 and 34.

[0041] In this way, by not pre-assembling the individual components, the package size can be made smaller compared to when they are pre-assembled, making it easier to transport to the site.

[0042] <Mechanism and Effects> In the waterproofing structure according to the embodiment of this disclosure, as shown in Figure 2, a waterproof sheet 30 is inserted into the gap between the hole wall of the through hole 20H formed in the exterior material 20 and the beam member 14. The end portion 30A of the waterproof sheet 30 is held in place on the inside of the exterior material 20 by being sandwiched between the exterior material 20 and the retaining member 32.

[0043] Therefore, it is possible to prevent water from entering the exterior material 20 from the outside of the waterproof sheet 30 (outside when viewed from the beam member 14) through the path indicated by arrow N1.

[0044] Similarly, as shown in Figure 3, the end portion 30C of the waterproof sheet 30 is held in place on the inside of the exterior material 20 by being sandwiched between the exterior material 20 and the retaining material 34.

[0045] Therefore, it is possible to prevent water from entering the exterior material 20 from the outside of the waterproof sheet 30 (the lower side when viewed from the beam member 14) through the path indicated by arrow N2.

[0046] This prevents water from seeping inside the exterior material 20 through which the beam member 14 that can be projected outwards penetrates.

[0047] Furthermore, in the watertight structure according to the embodiment of this disclosure, as shown in Figure 2, a plurality of beam members 14 are connected by secondary beams 16 as horizontal members, and a waterproof sheet is fixed to these beam members 14 and secondary beams 16 (parts 30B and 30D).

[0048] This prevents water from seeping into the interior of the exterior material 20 from between the beam member 14 and the waterproof sheet 30, and between the secondary beam 16 and the waterproof sheet 30.

[0049] Thus, in this disclosure, a watertight structure is formed by a dry construction method using a waterproof sheet 30. Therefore, a relatively large through-hole 20H spanning two beam members 14 can be easily sealed. Furthermore, watertight sealing can be achieved regardless of the size of the gap between the beam member 14 and the hole wall of the through-hole 20H. For example, this gap can be 10 mm or more.

[0050] In contrast, when sealing the gap between the beam member 14 and the wall of the through-hole in the exterior material 20 using a wet method such as an amorphous sealant, the likelihood of seal failure increases when the gap exceeds 10 mm. Because the through-hole is in a concealed space V, seal failure is difficult to detect and repair.

[0051] Furthermore, if the gap is less than 10 mm, high construction precision is required regarding the position of the beam member 14 and the through hole, resulting in poor workability.

[0052] <Other Embodiments> As shown in Figure 4, the waterproof sheet 30 in this embodiment has an end portion 30C (a plane along the Z and X directions) that is folded downwards and sandwiched between the retaining material 34 and the exterior material 20, when viewed from the portion 30D (a plane along the X and Y directions) that is adhered to the beam 16.

[0053] Furthermore, the waterproof sheet 30 has a portion 30B (a plane along the Z and Y directions) that is folded upward and adhered to the beam member 14 when viewed from portion 30D. In addition, it has an end portion 30A (a plane along the Z and X directions) that is folded laterally and sandwiched between the retaining member 32 and the exterior material 20 when viewed from portion 30B.

[0054] Thus, the waterproof sheet 30 has a three-dimensional shape. The waterproof sheet 30 may be formed by folding a single flexible sheet on a flat surface to have partial pleats, etc., but the embodiments of this disclosure are not limited to this.

[0055] For example, as shown in Figure 5(A), the waterproof sheet 40 may be formed by bonding together multiple members 40A, 40B, and 40C, each divided into planes, at their respective ends. Waterproof tape or the like may be applied over these bonded areas.

[0056] Alternatively, as shown in Figure 5(B) for the waterproof sheet 42, portions along multiple surfaces may be integrally formed by press molding or the like. Thus, the "waterproof sheet" in this disclosure can be any material that makes up the surface, and includes a variety of embodiments.

[0057] Furthermore, although the through-hole 20H in this embodiment is formed across multiple beam members 14, the embodiments of this disclosure are not limited to this. For example, as shown in Figure 6, the through-hole 20K may be provided for each beam member 14.

[0058] Furthermore, in this embodiment, the waterproof sheet 30 is bonded to the beam member 14 and the secondary beam 16 on the outside of the exterior material 20, but the embodiments of this disclosure are not limited to this. For example, if the waterproof sheet 30 is made of a material that is difficult to deform and can be held in contact with (or close to) the beam member 14 and the secondary beam 16, it is not necessary to bond the waterproof sheet 30 to the outside of the exterior material 20. Thus, this disclosure can be implemented in various forms. [Explanation of Symbols]

[0059] 10 Buildings 12 pillars (framework) 14 Beam members 16 Small beam 18 Beam (framework) 20 Exterior materials 20H through hole 20K through hole 30 Waterproof Sheets 30A end 30C end 32 Retaining material 34 Retaining material 40 Waterproof Sheets 42 Waterproof sheet

Claims

1. The building's structure and, The exterior material placed on the outside of the aforementioned structure, A beam member fixed to the aforementioned structure and projecting outwards through the through-hole in the exterior material, A waterproof sheet is inserted into the gap between the hole wall of the through hole and the beam member, Inside the exterior material, a retaining member is provided to hold one end of the waterproof sheet between itself and the exterior material, A watertight structure equipped with a waterproofing structure.

2. Multiple beam members are provided and connected by horizontal members. The through-hole is formed between a plurality of beam members, The waterproof sheet is fixed to the beam member and the horizontal member. The water-stopping structure according to claim 1.

3. The exterior material, with the waterproof sheet and the retaining material assembled according to claim 1 or 2, is brought in and fixed to the structure. The beam member is passed through the through hole and fixed to the structure. Methods for stopping water flow.

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