Buildings and building construction methods

Abstract

To provide a building and a building construction method which can provide a water proof structure between an inner member and a pipe even after a construction of an outer member.SOLUTION: An outer wall 12 has: a base material 21 as an inner member; an outer package material 22 as an outer member provided on an outdoor side from the inner member; and a first waterproof sheet 23 as a first waterproof layer provided on a face on the outer package material 22 side of the base material 21. A pipe 13 inserted into a through hole 12a penetrating the outer wall 12 has: a pipe body 31; a flange 32; and a second waterproof sheet 33 as a second waterproof layer provided on a first end face 32a of the flange 32. The through hole 12a has: a first hole 21a of a first hole diameter penetrating the base material 21; and a second hole 22a of a second hole diameter penetrating the outer package material 22. The flange 32 is larger than the first hole diameter, and smaller than the second hole diameter. The second waterproof sheet 33 is attached to the first waterproof sheet 23.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a building and a construction method for the building. [Background technology]

[0002] Patent Document 1 discloses a building that includes an exterior wall and a pipe inserted into a through-hole that penetrates the exterior wall. The exterior wall has a wall member as an interior member and siding as an exterior member that is provided on the exterior side of the interior member. In such a building, it is necessary to ensure waterproofing between the interior member and the pipe.

[0003] For example, Patent Document 1 discloses a waterproof structure for an inner member and a pipe using a waterproof member. The waterproof member has a cylindrical portion and a flange portion provided on the outer periphery of the cylindrical portion. The pipe is inserted into the cylindrical portion. The inner periphery of the cylindrical portion is provided with a protrusion that can abut against the outer periphery of the pipe. The protrusion ensures waterproofing between the pipe and the cylindrical portion. The flange portion is attached to the inner member while being pressed against the outer surface of the inner member. A waterproof sheet is attached to the flange portion and the inner member, from the surface of the flange opposite the surface facing the inner member to the outer surface of the inner member. The waterproof sheet ensures waterproofing between the flange portion and the inner member. In constructing a waterproof structure using this waterproof member, the outer member is constructed after the waterproof member is attached to the inner member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-247667 Summary of the Invention [Problem to be solved by the invention]

[0005] The waterproof structure between the inner member and the pipe may need to be established not only before the installation of the outer member, but also after the installation of the outer member. However, Patent Document 1 does not anticipate establishing a waterproof structure between the inner member and the pipe after the installation of the outer member. As a result, for example, when inserting the waterproof member into the through hole from the outer member side, the flange may interfere with the outer member, or if the hole diameter of the outer member is small, it may be difficult to install the waterproof member or waterproof sheet. With the technology of Patent Document 1, it is difficult to establish a waterproof structure between the inner member and the pipe after the installation of the outer member. [Means for solving the problem]

[0006] (1) A building that solves the above problem is a building that has an exterior wall and a pipe inserted into a through hole that penetrates the exterior wall, wherein the exterior wall has an inner member, an outer member that is provided on the outdoor side of the inner member, and a first waterproof layer that is provided on the surface of the inner member facing the outer member, and the pipe has a pipe body, a flange that is provided on the outer periphery of the pipe body, and a second waterproof layer that is provided on a first end face of the flange in the axial direction of the pipe body that is located on the indoor side, and the through hole has a first hole of a first hole diameter that penetrates the inner member and a second hole of a second hole diameter that penetrates the outer member, and the flange is larger than the first hole diameter and smaller than the second hole diameter, and the second waterproof layer is attached to the first waterproof layer.

[0007] According to this configuration, the flange has a smaller diameter than the second hole of the second hole provided in the outer member, so the pipe can be inserted into the through hole from the outer member side even after the outer member is installed. Meanwhile, the flange has a larger diameter than the first hole of the first hole provided in the inner member, so the flange cannot be inserted into the first hole. The second waterproof layer provided on the first end surface of the flange is pressed against the first waterproof layer by the flange, so that the second waterproof layer is attached to the first waterproof layer. The first waterproof layer and the second waterproof layer ensure waterproofing between the inner member and the flange. Therefore, a waterproof structure can be established between the inner member and the pipe even after the outer member is installed.

[0008] (2) In the building of (1) above, a sealing material is provided between the outer peripheral surface of the pipe body and the surface of the outer member that defines the second hole. According to this configuration, the sealing material ensures waterproofing between the outer member and the pipe body, thereby improving waterproofing between the outer wall and the pipe.

[0009] (3) In the building of (1) or (2) above, the pipe body and the flange are integrally formed. For example, if the pipe body and the flange are not integrally formed, i.e., are separate bodies, it is necessary to provide a sealant between the pipe body and the flange to ensure waterproofing between them. In contrast, with the above-described configuration, the pipe body and the flange are integrally formed, so there is no need to provide a sealant to ensure waterproofing between the pipe body and the flange. This simplifies the pipe configuration. This makes it easier to manufacture the pipe.

[0010] (4) In the building of any one of (1) to (3) above, the first waterproof layer is formed by a first waterproof sheet provided on the surface of the inner member facing the outer member.

[0011] This configuration reduces variations in the application of the first waterproof layer compared to when the first waterproof layer is made of waterproof paint, thereby more reliably maintaining waterproofing between the inner member and the flange.

[0012] (5) In the building of any one of (1) to (4) above, the second waterproof layer is formed by a second waterproof sheet provided on the first end surface of the flange. This configuration reduces variations in the application of the second waterproof layer compared to when the second waterproof layer is made of waterproof paint, thereby more reliably maintaining waterproofing between the inner member and the flange.

[0013] (6) In the building of (5) above, the second waterproof sheet is larger than the flange. With this configuration, the contact area between the second waterproof layer and the first waterproof layer is increased, so that even if there is an installation error or the second waterproof sheet is torn, waterproofing between the inner member and the flange can be more reliably achieved.

[0014] (7) In any one of the buildings (1) to (6) above, the pipe body has a first portion located closer to the inner member than the flange in the axial direction of the pipe body, and a second portion located closer to the outer member than the flange, and the outer diameter of the first portion is smaller than the outer diameter of the second portion. According to this configuration, the gap between the second portion of the pipe body and the surface of the outer member that defines the second hole is reduced, which reduces the amount of sealant used and improves the appearance of the exterior wall.

[0015] (8) In any one of the buildings (1) to (6) above, the pipe body has a first portion located closer to the inner member than the flange in the axial direction of the pipe body, and a second portion located closer to the outer member than the flange, and the outer diameter of the first portion is larger than the outer diameter of the second portion. According to this configuration, the gap between the second portion of the pipe body and the surface of the outer member that defines the second hole is increased, improving workability when attaching the second waterproof layer to the first waterproof layer.

[0016] (9) In any one of the buildings (1) to (8) above, a rib is provided on a second end face of the flange in the axial direction of the pipe body, the second end face being located opposite to the first end face.

[0017] According to this configuration, the rib increases the strength of the flange, so that the flange is less likely to deform when the flange is inserted into the second hole or when the flange presses the second waterproof layer against the first waterproof layer.

[0018] (10) A construction method for a building that solves the above problem is a construction method for a building that includes an exterior wall and a pipe inserted into a through hole that penetrates the exterior wall, wherein the exterior wall has an inner member, an outer member that is provided outdoors relative to the inner member, and a first waterproof layer that is provided on the surface of the inner member facing the outer member, and the pipe has a pipe body, a flange that is provided on the outer periphery of the pipe body, and a second waterproof layer that is provided on a first end face of the flange in the axial direction of the pipe body, and includes a through hole forming process for forming the through hole in the exterior wall by forming a first hole in the inner member with a first hole diameter that is smaller than the flange and a second hole in the outer member with a second hole diameter that is larger than the flange, an insertion process for inserting the pipe into the through hole from the outer member side so that the first end face of the flange is positioned indoors, and an attachment process for attaching the second waterproof layer to the first waterproof layer by pressing the flange against the first waterproof layer.

[0019] According to this method, in the through-hole forming step, a second hole having a second hole diameter larger than that of the flange is formed in the outer member. Therefore, even after the outer member is installed, in the inserting step, the pipe can be inserted into the through-hole from the outer member side. On the other hand, in the through-hole forming step, a first hole having a first hole diameter smaller than that of the flange is formed in the inner member. Therefore, in the inserting step, the flange is not inserted into the first hole. In the attaching step, the second waterproof layer provided on the first end surface of the flange is pressed against the first waterproof layer by the flange, thereby attaching the second waterproof layer to the first waterproof layer. The first waterproof layer and the second waterproof layer ensure waterproofing between the inner member and the flange. Therefore, even after the outer member is installed, a waterproof structure can be established between the inner member and the pipe. [Effects of the Invention]

[0020] According to the building and building construction method of the present invention, a waterproof structure can be provided between the inner member and the pipe even after the outer member has been constructed. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. 1 is a cross-sectional view showing a construction method for a building. [Figure 4] FIG. 1 is a cross-sectional view showing a construction method for a building. [Figure 5] FIG. 1 is a cross-sectional view showing a construction method for a building. [Figure 6] FIG. 10 is a cross-sectional view of a building showing a pipe in a modified example. [Figure 7] FIG. 10 is a cross-sectional view of a building showing a pipe in a modified example. [Figure 8] FIG. 10 is a cross-sectional view of a building showing a pipe in a modified example. [Figure 9] FIG. 10 is a side view showing a pipe in a modified example. [Figure 10] FIG. 10 is a cross-sectional view showing a building in a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0022] A building 10 and a construction method for the building 10 according to this embodiment will be described with reference to Figures 1 to 5. The building 10 and the construction method for the building 10 according to this embodiment are used in a building 10 having a constructed exterior wall 12 when pulling electrical wires from the outside of the building 10 into the building 10 or when ensuring ventilation between the inside and outside of the building 10. The building 10 according to this embodiment is made of wood. Examples of the building 10 include a house, a store, a parking lot, and a warehouse.

[0023] <Building 10> As shown in FIG. 1, a building 10 includes an exterior wall 12 and a pipe 13 inserted into a through-hole 12a provided in the exterior wall 12.

[0024] The exterior wall 12 has a base material 21 as an inner member, an exterior material 22 as an outer member, and a first waterproof sheet 23 as a first waterproof layer. The base material 21 of this embodiment is made of structural plywood. The exterior material 22 of this embodiment is made of multiple pieces of siding. The first waterproof sheet 23 of this embodiment is made of Tyvek (registered trademark). Note that the thickness of the first waterproof sheet 23 is exaggerated in the drawings. Although not shown, the exterior wall 12 has a thermal insulation material. The thermal insulation material is provided on the indoor side of the base material 21.

[0025] The exterior material 22 is provided on the outdoor side of the base material 21. The first waterproof sheet 23 is provided on the surface of the base material 21 facing the exterior material 22, i.e., the outdoor side. A ventilation layer 12b is provided between the exterior material 22 and the first waterproof sheet 23. The through-hole 12a has a first hole 21a with a first diameter that penetrates the base material 21, a second hole 22a with a second diameter that penetrates the exterior material 22, and a third hole 23a with a third diameter that penetrates the first waterproof sheet 23. The first hole 21a, the second hole 22a, and the third hole 23a are each circular. The centers of the first hole 21a, the second hole 22a, and the third hole 23a are aligned in a straight line in the thickness direction of the exterior wall 12. The second hole diameter is larger than the first hole diameter and the third hole diameter. The third hole diameter is the same as the first hole diameter.

[0026] As shown in Figures 1 and 2, the pipe 13 has a pipe body 31, a flange 32, and a second waterproof sheet 33 as a second waterproof layer. Note that the thickness of the second waterproof sheet 33 is exaggerated in the drawings. In this embodiment, the pipe body 31 and the flange 32 are formed by injection molding. The flange 32 is formed integrally with the pipe body 31.

[0027] The pipe body 31 is cylindrical. The pipe body 31 extends linearly. The flange 32 is provided on the outer periphery of the pipe body 31. The flange 32 is provided midway in the axial direction of the pipe body 31. In this embodiment, the flange 32 extends from the outer periphery of the pipe body 31. The pipe body 31 has a first portion 31a located on one side of the flange 32 in the axial direction of the pipe body 31, and a second portion 31b located on the other side of the flange 32. In this embodiment, the outer diameter of the first portion 31a and the outer diameter of the second portion 31b are the same. The flange 32 is annular. The outer diameter of the flange 32 is larger than the outer diameter of the pipe body 31.

[0028] 1, the outer diameter of the pipe body 31 is smaller than each of the first, second, and third hole diameters. Therefore, the outer diameter of the first portion 31a of the pipe body 31 is smaller than each of the first and third hole diameters. The outer diameter of the second portion 31b of the pipe body 31 is smaller than the second hole diameter. The outer diameter of the flange 32 is larger than each of the first and third hole diameters and smaller than the second hole diameter.

[0029] The flange 32 has a first end face 32a and a second end face 32b. The first end face 32a and the second end face 32b are each end faces of the flange 32 in the axial direction of the pipe body 31. The second end face 32b is the face opposite to the first end face 32a.

[0030] The second waterproof sheet 33 is flexible. The second waterproof sheet 33 is made of an elastic material. For example, the second waterproof sheet 33 is made of a resin sheet or a rubber sheet.

[0031] The second waterproof sheet 33 is provided on the first end surface 32a of the flange 32. The second waterproof sheet 33 has a first surface 33a and a second surface 33b. The first surface 33a and the second surface 33b are surfaces perpendicular to the thickness direction of the second waterproof sheet 33. The first surface 33a faces the first end surface 32a of the flange 32. The second surface 33b is the surface opposite the first surface 33a. In this embodiment, an adhesive layer (not shown) is provided on the first surface 33a and the second surface 33b of the second waterproof sheet 33. The second waterproof sheet 33 is attached to the first end surface 32a of the flange 32 by the adhesive layer provided on the first surface 33a. The adhesive layer on the first surface 33a only needs to be provided on the portion facing the first end surface 32a of the flange 32.

[0032] In this embodiment, the second waterproof sheet 33 is annular. In this embodiment, the outer diameter of the second waterproof sheet 33 is larger than the outer diameter of the flange 32. Therefore, the outer peripheral edge of the second waterproof sheet 33 is located outside the outer peripheral edge of the flange 32. In this embodiment, the outer diameter of the second waterproof sheet 33 is larger than the second hole diameter.

[0033] The pipe 13 is inserted through the through hole 12a in the exterior wall 12. Specifically, the flange 32 and the second waterproof sheet 33 are located in the ventilation layer 12b. The first end face 32a of the flange 32 is located closer to the interior than the second end face 32b. The second waterproof sheet 33 is located between the flange 32 and the first waterproof sheet 23. The first portion 31a of the pipe body 31 is located closer to the base material 21 than the flange 32. The first portion 31a of the pipe body 31 is inserted through the first hole 21a and the third hole 23a, thereby penetrating the base material 21 and the first waterproof sheet 23. The first portion 31a of the pipe body 31 also penetrates an insulating material (not shown). The second portion 31b of the pipe body 31 is located closer to the exterior material 22 than the flange 32. The second portion 31b of the pipe body 31 is inserted through the second hole 22a, thereby penetrating the exterior material 22.

[0034] The second waterproof sheet 33 is attached to the first waterproof sheet 23. In this embodiment, the second waterproof sheet 33 is attached to the first waterproof sheet 23 by an adhesive layer provided on the second surface 33b. The first waterproof sheet 23 and the second waterproof sheet 33 ensure waterproofing between the base material 21 and the flange 32.

[0035] A sealing material 14 is provided in the gap between the outer peripheral surface of the second portion 31b of the pipe body 31 and the surface defining the second hole 22a in the exterior material 22. The sealing material 14 ensures waterproofing between the exterior material 22 and the pipe body 31.

[0036] <10 Construction Methods for Buildings> The construction method for the building 10 includes a through-hole forming step, an inserting step, an attaching step, a cutting step, and a sealing step. Each step will be described in detail below.

[0037] As shown in Fig. 3, in the through hole forming step, the worker forms a through hole 12a in the exterior wall 12. Specifically, the worker first forms a second hole 22a in the exterior material 22, the second hole diameter being larger than the outer diameter of the flange 32. Next, the worker forms a third hole 23a in the first waterproof sheet 23, the third hole diameter being smaller than the outer diameter of the flange 32. Next, the worker forms a first hole 21a in the base material 21, the first hole diameter being smaller than the outer diameter of the flange 32.

[0038] The order in which the first hole 21a, the second hole 22a, and the third hole 23a are formed may be changed as appropriate. Also, after holes of the same diameter smaller than the outer diameter of the flange 32 are formed in each of the exterior material 22, the first waterproof sheet 23, and the base material 21, the diameter of only the hole in the exterior material 22 may be enlarged so that it is larger than the outer diameter of the flange 32.

[0039] Before the insertion step, the worker places the second waterproof sheet 33 on one end surface of the flange 32. The one end surface of the flange 32 on which the second waterproof sheet 33 is placed becomes the first end surface 32a. The timing for placing the second waterproof sheet 33 on the flange 32 may be before the through-hole forming step or after the through-hole forming step, as long as it is before the insertion step. Specifically, the worker inserts the pipe body 31 through the hole in the second waterproof sheet 33, and then attaches the second waterproof sheet 33 to the flange 32.

[0040] As described above, adhesive layers (not shown) are provided on the first surface 33a and the second surface 33b of the second waterproof sheet 33 in this embodiment. Before the second waterproof sheet 33 is attached to the flange 32, each adhesive layer is covered with a release paper (not shown). Therefore, when attaching the second waterproof sheet 33 to the flange 32, the worker peels off the release paper covering the first surface 33a of the second waterproof sheet 33 to expose the adhesive layer provided on the first surface 33a. The worker then attaches the second waterproof sheet 33 to the flange 32 by bringing the exposed adhesive layer into contact with the flange 32.

[0041] In addition, in this embodiment, just before the insertion step, the worker peels off the release paper covering the second surface 33b of the second waterproof sheet 33 to expose the adhesive layer provided on the second surface 33b.

[0042] 4, in the insertion step, a worker inserts the pipe 13 into the through hole 12a from the exterior material 22 side. At this time, the pipe 13 is inserted into the through hole 12a so that the first end surface 32a of the flange 32 is located on the indoor side. The first portion 31a of the pipe body 31 is inserted into the through hole 12a in the order of the second hole 22a, the third hole 23a, and the first hole 21a.

[0043] The outer diameter of the flange 32 is smaller than the second hole diameter. Therefore, the flange 32 is inserted into the second hole 22a without interfering with the exterior material 22. On the other hand, the outer diameter of the second waterproof sheet 33 in this embodiment is larger than the second hole diameter. Therefore, the worker inserts the flange 32 into the second hole 22a so that the adhesive layer provided on the second surface 33b of the second waterproof sheet 33 does not come into contact with the surface of the exterior material 22 that defines the second hole 22a. More specifically, the worker inserts the flange 32 into the second hole 22a while folding the portion of the second waterproof sheet 33 that is located outside the outer peripheral edge of the flange 32 toward the outdoors.

[0044] As shown in FIG. 5, when the flange 32 passes through the second hole 22a and reaches the breathable layer 12b, the folded second waterproof sheet 33 returns to its original state before being folded. The outer diameter of the flange 32 is larger than the diameter of the first hole and the diameter of the third hole. Therefore, the flange 32 is not inserted through the first hole 21a and the third hole 23a. The second surface 33b of the second waterproof sheet 33 faces the area of ​​the first waterproof sheet 23 surrounding the third hole 23a.

[0045] The second portion 31b of the pipe body 31 is inserted into the second hole 22a. A gap S is formed between the outer peripheral surface of the second portion 31b of the pipe body 31 and the surface of the exterior material 22 that defines the second hole 22a. In this embodiment, a part of the second portion 31b of the pipe body 31 protrudes from the surface of the exterior material 22 facing outdoors.

[0046] In the attachment step, the worker attaches the second waterproof sheet 33 to the first waterproof sheet 23 by pressing the flange 32 against the first waterproof sheet 23. At this time, the worker holds the portion of the pipe body 31 that protrudes beyond the outdoor surface of the exterior material 22 and pushes the pipe 13 toward the indoor side, thereby pressing the flange 32 against the first waterproof sheet 23. In other words, the worker presses the flange 32 against the first waterproof sheet 23 without inserting his hand into the ventilation layer 12b through the gap S between the pipe body 31 and the exterior material 22 to directly press the flange 32. In this embodiment, the second waterproof sheet 33 is attached to the first waterproof sheet 23 by contacting the adhesive layer provided on the second surface 33b of the second waterproof sheet 33 with the first waterproof sheet 23.

[0047] The worker also inserts a spatula or the like (not shown) into the gap S between the pipe body 31 and the exterior material 22, and uses the spatula or the like to press the portion of the second waterproof sheet 33 that is located outside the outer peripheral edge of the flange 32 against the first waterproof sheet 23. This causes the entire second surface 33b of the second waterproof sheet 33 to be attached to the first waterproof sheet 23.

[0048] As shown in Fig. 1, in the cutting process, the worker cuts off the portion of the pipe body 31 that protrudes beyond the outdoor surface of the exterior material 22. In Fig. 1, the portion of the pipe body 31 that is cut in the cutting process is indicated by a two-dot chain line.

[0049] In the sealing process, the worker fills the gap S between the outer peripheral surface of the second portion 31b of the pipe body 31 and the surface that defines the second hole 22a in the exterior material 22 with the sealant 14. The filled sealant 14 hardens.

[0050] [Operation of this embodiment] The operation of this embodiment will be described. The building 10 includes an exterior wall 12 and a pipe 13 inserted into a through-hole 12a that penetrates the exterior wall 12. The exterior wall 12 includes a base material 21, an exterior material 22 provided on the exterior side of the base material 21, and a first waterproof sheet 23 provided on the surface of the base material 21 facing the exterior material 22. The pipe 13 includes a pipe body 31, a flange 32 provided on the outer periphery of the pipe body 31, and a second waterproof sheet 33 provided on a first end face 32a of the flange 32. The through-hole 12a includes a first hole 21a of a first diameter that penetrates the base material 21, a second hole 22a of a second diameter that penetrates the exterior material 22, and a third hole 23a of a third diameter that penetrates the first waterproof sheet 23. The flange 32 is larger than the first and third hole diameters and smaller than the second hole diameter. The second waterproof sheet 33 is attached to the first waterproof sheet 23. A sealing material 14 is provided between the outer peripheral surface of the pipe body 31 and the surface of the exterior material 22 that defines the second hole 22a.

[0051] According to this configuration, the flange 32 is smaller than the second hole diameter of the second hole 22a provided in the exterior material 22, so the pipe 13 can be inserted into the through hole 12a from the exterior material 22 side, even after the exterior material 22 is installed. On the other hand, the flange 32 is larger than the first hole diameter of the first hole 21a provided in the base material 21 and the third hole diameter of the third hole 23a provided in the first waterproof sheet 23, so the flange 32 cannot be inserted into the first hole 21a or the third hole 23a. The second waterproof sheet 33 provided on the first end surface 32a of the flange 32 is pressed against the first waterproof sheet 23 by the flange 32, so that the second waterproof sheet 33 is attached to the first waterproof sheet 23. The first waterproof sheet 23 and the second waterproof sheet 33 ensure waterproofing between the base material 21 and the flange 32. Therefore, a waterproof structure can be established between the base material 21 and the pipe 13, even after the exterior material 22 is installed. Furthermore, the sealing material 14 ensures waterproofing between the exterior material 22 and the pipe body 31. Therefore, waterproofing between the exterior wall 12 and the pipe 13 is ensured.

[0052] [Effects of this embodiment] The effects of this embodiment will be described. (1) Because the flange 32 is smaller than the second hole diameter of the second hole 22a provided in the exterior material 22, the pipe 13 can be inserted into the through hole 12a from the exterior material 22 side, even after the exterior material 22 is installed. On the other hand, because the flange 32 is larger than the first hole diameter of the first hole 21a provided in the base material 21 and the third hole diameter of the third hole 23a provided in the first waterproof sheet 23, the flange 32 cannot be inserted into the first hole 21a or the third hole 23a. The second waterproof sheet 33 provided on the first end surface 32a of the flange 32 is pressed against the first waterproof sheet 23 by the flange 32, thereby adhering the second waterproof sheet 33 to the first waterproof sheet 23. The first waterproof sheet 23 and the second waterproof sheet 33 ensure waterproofing between the base material 21 and the flange 32. Therefore, a waterproof structure can be established between the base material 21 and the pipe 13, even after the exterior material 22 is installed.

[0053] (2) A sealing material 14 is provided between the outer peripheral surface of the pipe body 31 and the surface of the exterior material 22 that defines the second hole 22a. With this configuration, the sealing material 14 ensures waterproofing between the exterior material 22 and the pipe body 31. Therefore, waterproofing between the exterior wall 12 and the pipe 13 is improved.

[0054] (3) For example, if the pipe body 31 and the flange 32 are not integrally formed, i.e., are separate bodies, it is necessary to provide a sealant between the pipe body 31 and the flange 32 to ensure waterproofing between the pipe body 31 and the flange 32. In contrast, in this embodiment, the pipe body 31 and the flange 32 are integrally formed, so there is no need to use a sealant to ensure waterproofing between the pipe body 31 and the flange 32. This simplifies the configuration of the pipe 13. This makes it easier to manufacture the pipe 13.

[0055] (4) The first waterproof layer is formed of the first waterproof sheet 23. This reduces variations in the construction of the first waterproof layer compared to when the first waterproof layer is formed of waterproof paint. Therefore, the gap between the base material 21 and the flange 32 can be more reliably waterproofed.

[0056] (5) The second waterproof layer is formed of the second waterproof sheet 33. This reduces variations in the construction of the second waterproof layer compared to when the second waterproof layer is formed of waterproof paint. Therefore, the gap between the base material 21 and the flange 32 can be more reliably waterproofed.

[0057] (6) The second waterproof sheet 33 is larger than the flange 32. With this configuration, the contact area between the second waterproof sheet 33 and the first waterproof sheet 23 is increased, so that waterproofing between the base material 21 and the flange 32 can be more reliably achieved even if there is an installation error or the second waterproof sheet 33 is torn.

[0058] (7) The construction method for the building 10 includes a through-hole forming step of forming a through-hole 12a in the exterior wall 12. In the through-hole forming step, a first hole 21a having a first hole diameter smaller than the flange 32 is formed in the base material 21. A second hole 22a having a second hole diameter larger than the flange 32 is formed in the exterior material 22. A third hole 23a having a third hole diameter smaller than the flange 32 is formed in the first waterproof sheet 23.

[0059] The construction method for the building 10 includes an insertion step of inserting the pipe 13 into the through hole 12a from the exterior cladding material 22 side so that the first end face 32a of the flange 32, to which the second waterproof sheet 33 is attached, is located on the indoor side. Because the flange 32 is smaller than the second hole diameter, the pipe 13 can be inserted into the through hole 12a even after the construction of the exterior cladding material 22. On the other hand, because the flange 32 is larger than the first hole diameter of the first hole 21a provided in the base material 21 and the third hole diameter of the third hole 23a provided in the first waterproof sheet 23, the flange 32 is not inserted into the first hole 21a or the third hole 23a.

[0060] The construction method for the building 10 includes an attachment step of attaching the second waterproof sheet 33 to the first waterproof sheet 23 by pressing the flange 32 against the first waterproof sheet 23. The first waterproof sheet 23 and the second waterproof sheet 33 ensure waterproofing between the base material 21 and the flange 32. Therefore, a waterproof structure can be established between the base material 21 and the pipe 13 even after the exterior material 22 has been installed.

[0061] (8) The second waterproof sheet 33 is preliminarily provided on the first end surface 32a of the flange 32 before the flange 32 is inserted into the second hole 22a. The second waterproof sheet 33 is attached to the first waterproof sheet 23 by being pressed against the first waterproof sheet 23 by the flange 32. In this case, the worker can attach the second waterproof sheet 33 without inserting his or her hand into the breathable layer 12b through the second hole 22a. Therefore, even if the second hole diameter of the second hole 22a is small, a waterproof structure can be provided between the base material 21 and the pipe 13.

[0062] (9) Water may penetrate the ventilation layer 12b of the exterior wall 12. If waterproofing is not ensured between the base material 21 and the pipe 13, the water that penetrates the ventilation layer 12b may penetrate into the interior through the gap between the pipe 13 and the base material 21. This may cause the infiltrating water to dampen the insulating material (not shown) that is located on the interior side of the base material 21. In contrast, in this embodiment, waterproofing is ensured between the base material 21 and the pipe 13. This makes it possible to prevent the insulating material from becoming damp due to water that penetrates between the base material 21 and the pipe 13.

[0063] (10) After the insertion step, a part of the second portion 31b of the pipe body 31 protrudes from the outdoor surface of the exterior material 22. Therefore, in the attachment step, the worker can press the flange 32 against the first waterproof sheet 23 by holding the part of the pipe body 31 that protrudes from the outdoor surface of the exterior material 22 and pushing the pipe 13 toward the indoor side.

[0064] <Example of change> The above-described embodiment is an example of the possible forms that the building 10 and the construction method for the building 10 can take, and is not intended to limit the forms. The building 10 and the construction method for the building 10 can take forms different from those exemplified in the above-described embodiment. Examples of such forms include forms in which part of the configuration of the embodiment is replaced, modified, or omitted, or forms in which a new configuration is added to the embodiment. Modified examples of the embodiment are shown below.

[0065] The pipe body 31 and the flange 32 may be separate bodies. In this case, a sealant is provided between the outer circumferential surface of the pipe body 31 and the inner circumferential surface of the flange 32 to ensure waterproofing between the pipe body 31 and the flange 32.

[0066] The flange 32 does not have to be circular. For example, the flange 32 may be rectangular. In the above embodiment, the first waterproof layer is formed by the first waterproof sheet 23, but this is not limited thereto. For example, the first waterproof layer may be formed by a waterproof coating applied to the surface of the base material 21 facing the exterior material 22. In this case, the first waterproof layer is not provided so as to block the portion of the surface of the base material 21 facing the exterior material 22 where the first hole 21a opens. Therefore, the step of forming the third hole 23a of the third hole diameter is not necessary in the through hole forming step.

[0067] In the above embodiment, the second waterproof layer is formed by the second waterproof sheet 33, but this is not limiting. For example, the second waterproof layer may be formed by waterproof paint applied to the first end surface 32a of the flange 32.

[0068] The second waterproof sheet 33 does not have to be circular. For example, the second waterproof sheet 33 may be rectangular. The second waterproof sheet 33 does not have to be larger than the flange 32. The outer diameter of the second waterproof sheet 33 may be the same as the outer diameter of the flange 32. In other words, the second waterproof sheet 33 does not have to have a portion located outside the outer peripheral edge of the flange 32.

[0069] The outer diameter of the second waterproof sheet 33 does not have to be larger than the second hole diameter of the second hole 22a in the exterior material 22. The outer diameter of the second waterproof sheet 33 may be smaller than the second hole diameter. In this case, the second waterproof sheet 33 does not have to be flexible.

[0070] In the above embodiment, the first hole diameter of the first hole 21a of the base material 21 and the third hole diameter of the third hole 23a of the first waterproof sheet 23 were the same size, but the first hole diameter and the third hole diameter may be different sizes.

[0071] The outer diameter of the first portion 31a of the pipe body 31 and the outer diameter of the second portion 31b of the pipe body 31 may be different. 6, the outer diameter of the second portion 31b may be larger than the outer diameter of the first portion 31a. In other words, the outer diameter of the first portion 31a may be smaller than the outer diameter of the second portion 31b. In this case, the gap S between the second portion 31b of the pipe body 31 and the surface defining the second hole 22a of the exterior material 22 is reduced, which reduces the amount of sealing material 14 used and improves the appearance of the exterior wall 12.

[0072] 7, the outer diameter of the second portion 31b may be smaller than the outer diameter of the first portion 31a. In other words, the outer diameter of the first portion 31a may be larger than the outer diameter of the second portion 31b. In this case, the gap S between the second portion 31b of the pipe body 31 and the surface defining the second hole 22a of the exterior material 22 becomes larger, improving the workability when attaching the second waterproof sheet 33 to the first waterproof sheet 23.

[0073] 8 and 9, ribs 34 may be provided on the second end surface 32b of the flange 32. For example, four ribs 34 are provided at equal intervals in the circumferential direction of the flange 32. Each rib 34 has a triangular prism shape. Each rib 34 extends in the radial direction of the flange 32.

[0074] In this case, the ribs 34 increase the strength of the flange 32, making the flange 32 less likely to deform when the flange 32 is inserted into the second hole 22a or when the flange 32 presses the second waterproof sheet 33 against the first waterproof sheet 23.

[0075] The number, arrangement, and shape of the ribs 34 may be changed as appropriate. For example, in Fig. 9, the ribs 34 are provided at positions separated from the outer circumferential surface of the pipe body 31, but they may be connected to the outer circumferential surface of the pipe body 31.

[0076] The building 10 is not limited to being made of wood. The building 10 may be made of concrete or steel. As shown in Figure 10, the exterior wall 12 of a concrete building 10 has an insulating material 24 as an inner member, a concrete wall 25 as an outer member provided on the outdoor side of the inner member, and a first waterproof sheet 23 provided on the surface of the insulating material 24 facing the concrete wall 25.

[0077] As in the above embodiment, the pipe 13 has a pipe body 31, a flange 32 provided on the outer periphery of the pipe body 31, and a second waterproof sheet 33 provided on a first end surface 32a of the flange 32.

[0078] The through hole 12a in the exterior wall 12 has a first hole 24a of a first diameter that penetrates the insulation 24, a second hole 25a of a second diameter that penetrates the concrete wall 25, and a third hole 23a of a third diameter that penetrates the first waterproof sheet 23. The flange 32 of the pipe 13 is larger than the first hole diameter and the third hole diameter, but smaller than the second hole diameter. The second waterproof sheet 33 is attached to the first waterproof sheet 23.

[0079] In this case, the same effect as effect (1) of the above embodiment can be obtained. The cutting step may be omitted. The cutting step may be performed after the sealing step.

[0080] In the above embodiment, all of the release paper covering the second surface 33b of the second waterproof sheet 33 was peeled off before the insertion step, but it is also possible to peel off only the portion of the release paper covering the second surface 33b of the second waterproof sheet 33 that overlaps the first end surface 32a of the flange 32. In other words, the portion of the release paper covering the second surface 33b of the second waterproof sheet 33 that is located outside the outer peripheral edge of the flange 32 may be left.

[0081] Of the release paper covering the second surface 33b of the second waterproof sheet 33, the portion located outside the outer peripheral edge of the flange 32 is peeled off after the insertion step and before the attachment step. In this case, even if the second waterproof sheet 33 comes into contact with the surface of the exterior material 22 that defines the second hole 22a in the insertion step, the second waterproof sheet 33 can be prevented from sticking to the exterior material 22.

[0082] In the above example, the release paper covering the second surface 33b of the second waterproof sheet 33 may be provided with a tab that protrudes outward beyond the outer peripheral edge of the second waterproof sheet 33. In this case, when peeling off the portion of the release paper covering the second surface 33b of the second waterproof sheet 33 that is located outside the outer peripheral edge of the flange 32, the worker can pull the tab to peel it off, improving workability.

[0083] The thickness of the flange 32 may be changed as appropriate as long as it does not protrude from the exterior surface of the exterior material 22. In the above embodiment, adhesive layers were provided in advance on the first surface 33a and the second surface 33b of the second waterproof sheet 33, but adhesive layers do not necessarily have to be provided.

[0084] As an example, the second waterproof sheet 33 may be attached to the first end surface 32a of the flange 32 by an adhesive applied to the first surface 33a. The second waterproof sheet 33 may be attached to the first waterproof sheet 23 by an adhesive applied to the second surface 33b.

[0085] As another example, the second waterproof sheet 33 may be attached to the first end surface 32a of the flange 32 by adhesive applied to the first end surface 32a of the flange 32. The second waterproof sheet 33 may be attached to the first waterproof sheet 23 by adhesive applied around the third hole 23a of the first waterproof sheet 23.

[0086] This specification discloses the following techniques: [Appendix 1] A building comprising an exterior wall and a pipe inserted into a through hole penetrating the exterior wall, wherein the exterior wall has an inner member, an outer member arranged outdoors relative to the inner member, and a first waterproof layer arranged on the surface of the inner member facing the outer member, the pipe has a pipe body, a flange arranged on the outer periphery of the pipe body, and a second waterproof layer arranged on a first end face of the flange in the axial direction of the pipe body that is located indoors, the through hole has a first hole of a first hole diameter that penetrates the inner member and a second hole of a second hole diameter that penetrates the outer member, the flange is larger than the first hole diameter and smaller than the second hole diameter, and the second waterproof layer is attached to the first waterproof layer.

[0087] [Appendix 2] In the building described in Supplementary Note 1, a sealing material is provided between the outer peripheral surface of the pipe body and the surface of the outer member that defines the second hole.

[0088] [Appendix 3] In the building described in Appendix 1, the pipe body and the flange are integrally formed.

[0089] [Appendix 4] In the building described in Supplementary Note 1, the first waterproof layer is composed of a first waterproof sheet provided on the surface of the inner member facing the outer member.

[0090] [Appendix 5] In the building described in Supplementary Note 1, the second waterproof layer is formed by a second waterproof sheet provided on the first end surface of the flange.

[0091] [Appendix 6] In the building described in Appendix 5, the second waterproof sheet is larger than the flange. [Appendix 7] In the building described in Appendix 1, the pipe body has a first portion located closer to the inner member than the flange in the axial direction of the pipe body, and a second portion located closer to the outer member than the flange, and the outer diameter of the first portion is smaller than the outer diameter of the second portion.

[0092] [Appendix 8] In the building described in Appendix 1, the pipe body has a first portion located closer to the inner member than the flange in the axial direction of the pipe body, and a second portion located closer to the outer member than the flange, and the outer diameter of the first portion is larger than the outer diameter of the second portion.

[0093] [Appendix 9] In the building described in Supplementary Note 1, a rib is provided on a second end face of the flange in the axial direction of the pipe body, the second end face being located opposite to the first end face.

[0094] [Appendix 10] A construction method for a building comprising an exterior wall and a pipe inserted into a through hole penetrating the exterior wall, wherein the exterior wall comprises an inner member, an outer member provided outdoors relative to the inner member, and a first waterproof layer provided on the surface of the inner member facing the outer member, and the pipe comprises a pipe body, a flange provided on the outer periphery of the pipe body, and a second waterproof layer provided on a first end face of the flange in the axial direction of the pipe body, the construction method comprising the steps of: forming a first hole in the inner member having a first hole diameter smaller than that of the flange, and forming a second hole in the outer member having a second hole diameter larger than that of the flange, thereby forming the through hole in the exterior wall; inserting the pipe into the through hole from the outer member side so that the first end face of the flange is positioned indoors; and attaching the second waterproof layer to the first waterproof layer by pressing the flange against the first waterproof layer. [Explanation of symbols]

[0095] 10...building, 12...exterior wall, 12a...through hole, 13...pipe, 14...sealant, 21...underlayment material as inner component, 21a...first hole, 22...exterior material as outer component, 22a...second hole, 23...first waterproof sheet as first waterproof layer, 31...pipe body, 31a...first part, 31b...second part, 32...flange, 32a...first end face, 32b...second end face, 33...second waterproof sheet as second waterproof layer, 34...rib.

Claims

1. A building comprising an exterior wall and a pipe inserted into a through hole penetrating the exterior wall, the exterior wall includes an inner member, an outer member provided on the outdoor side of the inner member, and a first waterproof layer provided on a surface of the inner member facing the outer member, The pipe has a pipe body, a flange provided on an outer periphery of the pipe body, and a second waterproof layer provided on a first end surface of the flange in the axial direction of the pipe body, the first end surface being located on the indoor side, the through hole includes a first hole having a first diameter that penetrates the inner member and a second hole having a second diameter that penetrates the outer member, the flange is larger than the first hole diameter and smaller than the second hole diameter; the pipe body has a first portion located closer to the inner member than the flange in an axial direction of the pipe body, and a second portion located closer to the outer member than the flange, The outer diameter of the second portion is constant throughout the second portion in the axial direction of the pipe body, The outer diameter of the second portion is smaller than the outer diameter of the flange, The second waterproof layer is attached to the first waterproof layer of the building.

2. The building according to claim 1, wherein a sealing material is provided between the outer peripheral surface of the pipe body and the surface of the outer member that defines the second hole.

3. The building according to claim 1, wherein the pipe body and the flange are integrally formed.

4. 2. The building according to claim 1, wherein the first waterproof layer is constituted by a first waterproof sheet provided on the surface of the inner member facing the outer member.

5. The building according to claim 1, wherein the second waterproof layer is constituted by a second waterproof sheet provided on the first end surface of the flange.

6. The building according to claim 5, wherein the second waterproof sheet is larger than the flange.

7. A building as described in claim 1, wherein the outer diameter of the first portion is smaller than the outer diameter of the second portion.

8. A building as described in claim 1, wherein the outer diameter of the first portion is larger than the outer diameter of the second portion.

9. The building according to claim 1, wherein a rib is provided on a second end face of the flange in the axial direction of the pipe body, the second end face being located opposite to the first end face.

10. A construction method for a building having an exterior wall and a pipe inserted into a through-hole penetrating the exterior wall, the exterior wall includes an inner member, an outer member provided on the outdoor side of the inner member, and a first waterproof layer provided on a surface of the inner member facing the outer member, The pipe includes a pipe body, a flange provided on an outer periphery of the pipe body, and a second waterproof layer provided on a first end surface of the flange in an axial direction of the pipe body, the pipe body has a first portion located closer to the inner member than the flange in an axial direction of the pipe body, and a second portion located closer to the outer member than the flange, The outer diameter of the second portion is constant throughout the second portion in the axial direction of the pipe body, The outer diameter of the second portion is smaller than the outer diameter of the flange, a through-hole forming step of forming a first hole in the inner member having a first diameter smaller than that of the flange, and forming a second hole in the outer member having a second diameter larger than that of the flange, thereby forming the through hole in the outer wall; an insertion step of inserting the pipe into the through hole from the outer member side so that the first end surface of the flange is positioned on the indoor side; an attachment step of attaching the second waterproof layer to the first waterproof layer by pressing the flange against the first waterproof layer; A construction method for a building having the above.

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