Base material forming bag, base material, exterior wall, and method for forming base material

Abstract

The present invention provides a base material forming bag that allows a base material to be formed between the outer wall member and the inner wall member after the construction of the exterior wall, a base material, an exterior wall, and a method for forming the base material. [Solution] The building 10 comprises an outer wall member 11 with a through hole 11h, an inner wall member 12 located on the indoor side of the outer wall member 11, and a base material 13 provided between the outer wall member 11 and the inner wall member 12. The base material 13 comprises a base material forming bag 14 and a filler material 15. The base material forming bag 14 comprises a main body portion 40 and a cylindrical injection portion 42. The main body portion 40 is flexible. The main body portion 40 is filled with the filler material 15. The injection portion 42 extends from the main body portion 40 and is connected to the inside of the main body portion 40. The main body portion 40 has a drainage structure that guides water that has entered between the outer wall member 11 and the inner wall member 12 downwards.

Description

Technical Field

[0001] The present disclosure relates to a base material forming bag, a base material, an outer wall, and a method for forming a base material.

Background Art

[0002] The outer wall described in Patent Document 1 includes an outer wall member (in the same document, siding) and an inner wall member provided on the indoor side of the outer wall member (in the same document, the outer plate of the wall member). A gap is provided between the outer wall member and the inner wall member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] After the construction of the outer wall, accessories may be attached to the outer wall by fixing members such as screws and nails, or the outer wall member may be fixed to the inner wall member by fixing members so that the cracked outer wall member does not fall off. When such fixing work is performed in a portion where no base material such as a skirt or a crossbar is provided between the outer wall member and the inner wall member, the outer wall member may crack due to deformation so as to approach the inner wall member. Therefore, after the construction of the outer wall, it is required to form a base material between the outer wall member and the inner wall member.

Means for Solving the Problems

[0005] (1) A base material forming bag that solves the above problem is a base material forming bag for forming a base material between an outer wall member having through holes and an inner wall member located on the indoor side of the outer wall member, comprising a flexible main body filled with a filler, and a cylindrical injection part extending from the main body and connected to the inside of the main body, wherein the main body has a drainage structure that guides water that has entered between the outer wall member and the inner wall member downward.

[0006] With this configuration, the main body is flexible and, when folded, is inserted between the outer wall member and the inner wall member through a through-hole in the outer wall member. Filling material is injected into the main body via the injection section, forming a base material between the outer wall member and the inner wall member. Therefore, a base material can be formed between the outer wall member and the inner wall member after the construction of the outer wall. Furthermore, because the main body has a drainage structure, water that penetrates between the outer and inner wall members is less likely to accumulate on the substrate. Therefore, water leakage into the building can be suppressed.

[0007] (2) In the base material forming bag of (1) above, the main body portion has a first opposing surface facing the outer wall member and a second opposing surface facing the inner wall member, and the main body portion has a projection that protrudes from at least one of the first opposing surface and the second opposing surface as the drainage structure.

[0008] With this configuration, the protrusions create gaps between the first opposing surface and the outer wall member, and between the second opposing surface and the inner wall member, at least one of these gaps. As a result, water that enters between the outer wall member and the inner wall member flows downward through these gaps. Therefore, water that enters between the outer wall member and the inner wall member is less likely to accumulate on the substrate.

[0009] (3) In the base material forming bag described in (2) above, the main body further has an upper surface which is inclined so as to be located downward toward the surface on which the projection is provided, among the first opposing surface and the second opposing surface.

[0010] With this configuration, water adhering to the upper surface of the main body is guided by the inclined upper surface of the main body toward the surface with the projection among the first and second opposing surfaces, and then flows downward through the gap. Therefore, water that penetrates between the outer wall member and the inner wall member is less likely to accumulate on the substrate.

[0011] (4) In the base material forming bag of (1) above, the main body portion has a first opposing surface facing the outer wall member, a second opposing surface facing the inner wall member, and two side surfaces connecting the first opposing surface and the second opposing surface, and the main body portion has an upper surface as the drainage structure that is inclined to be located downward toward at least one of the two side surfaces.

[0012] With this configuration, water adhering to the upper surface of the main body is guided toward the side of the main body by the sloping upper surface of the main body, and then flows down between the outer wall member and the inner wall member. Therefore, water that penetrates between the outer wall member and the inner wall member is less likely to accumulate on the substrate.

[0013] (5) In any one of the base material forming bags described in (1) to (4) above, the length of the injection section is greater than the thickness of the outer wall member, and the injection section is provided with a cutting promotion section in the direction in which the injection section extends.

[0014] When filling the main body with filler through the injection section, workability is improved if the tip of the injection section protrudes from the outdoor side of the outer wall member. With the above configuration, since the length of the injection section is greater than the thickness of the outer wall member, when the main body is inserted between the outer wall member and the inner wall member, the tip of the injection section protrudes from the outdoor side of the outer wall member. Therefore, workability is improved when filling with filler.

[0015] On the other hand, when sealing a through-hole, it is easier to ensure sufficient sealing depth if the tip of the injection section is located inside the through-hole. With the above configuration, since the injection section is equipped with a cutting-promoting section, the injection section can be easily cut by the cutting-promoting section after filling with the filler material. As the injection section is cut, the new tip of the injection section is located inside the through-hole. Therefore, it is easier to ensure sufficient sealing depth. In this case, a sealing backup material becomes unnecessary.

[0016] (6) A base material that solves the above problem comprises one of the base material forming bags described in (1) to (5) above, and a filler material filled in the main body of the base material forming bag. With this configuration, the main body is flexible and, when folded, is inserted between the outer wall member and the inner wall member through a through-hole in the outer wall member. Filling material is injected into the main body via the injection section, forming a base material between the outer wall member and the inner wall member. Therefore, a base material can be formed between the outer wall member and the inner wall member after the construction of the outer wall. Furthermore, because the main body has a drainage structure, water that penetrates between the outer and inner wall members is less likely to accumulate on the substrate. Therefore, water leakage into the building can be suppressed.

[0017] (7) An exterior wall that solves the above problem comprises an outer wall member having through holes, an inner wall member provided on the indoor side of the outer wall member, and the base material of (6) provided between the outer wall member and the inner wall member.

[0018] With this configuration, the main body is flexible and, when folded, is inserted between the outer wall member and the inner wall member through a through-hole in the outer wall member. Filling material is injected into the main body via the injection section, forming a base material between the outer wall member and the inner wall member. Therefore, a base material can be formed between the outer wall member and the inner wall member after the construction of the outer wall. In addition, since the main body has a drainage structure, water that has entered between the outer wall member and the inner wall member is unlikely to accumulate on the base material. Therefore, leakage into the room can be suppressed.

[0019] (8) The method for forming the base material for forming the base material in (6) above includes a through-hole forming step of forming a through-hole in the outer wall member, an insertion step of inserting the main body portion in a folded state between the outer wall member and the inner wall member through the through-hole, and a filling step of filling the main body portion with the filling material through the injection portion.

[0020] According to this method, by folding the main body portion, the main body portion can be inserted between the outer wall member and the inner wall member through the through-hole of the outer wall member. By filling the main body portion with the filling material through the injection portion, a base material can be formed between the outer wall member and the inner wall member. Therefore, a base material can be formed between the outer wall member and the inner wall member after the construction of the outer wall.

Advantages of the Invention

[0021] According to the base material forming bag, base material, outer wall, and base material forming method of the present disclosure, a base material can be formed between the outer wall member and the inner wall member after the construction of the outer wall.

Brief Description of the Drawings

[0022] [Figure 1] It is a cross-sectional view of the outer part of the outer wall. [Figure 2] It is a perspective view showing the base material forming bag before construction. [Figure 3] It is a cross-sectional view showing the through-hole forming step and the insertion step of the base material forming method. [Figure 4] It is a cross-sectional view showing the filling step of the base material forming method. [Figure 5] It is a cross-sectional view showing the cutting step of the base material forming method. [Figure 6] It is a perspective view showing the base material forming bag in the modified example.

Modes for Carrying Out the Invention

[0023] Referring to Figures 1 to 5, the base material forming bag 14, base material 13, exterior wall 10, and the method of forming the base material 13 in this embodiment will be described. The base material 13 in this embodiment is formed to attach ancillary items (not shown) to the exterior wall 10 after the exterior wall 10 has been constructed.

[0024] <Exterior wall 10> As shown in Figure 1, the exterior wall 10 of the building comprises an exterior wall member 11, an interior wall member 12, and a base material 13. The exterior wall member 11 is made of exterior wall panels such as siding. The interior wall member 12 is made of base panels such as structural plywood. The interior wall member 12 is located on the interior side of the exterior wall member 11. The interior wall member 12 is provided at a predetermined distance from the exterior wall member 11. A ventilation layer 10a is provided between the exterior wall member 11 and the interior wall member 12. Through holes 11h are provided in the exterior wall member 11. The base material 13 is provided between the exterior wall member 11 and the interior wall member 12. That is, the base material 13 is provided in the ventilation layer 10a. Although not shown, the exterior wall 10 further comprises a column located on the interior side of the interior wall member 12, and an interior wall member located on the interior side of the column.

[0025] <Underlayment 13> The base material 13 comprises a base material forming bag 14 and a filler material 15. The base material forming bag 14 is made of, for example, a sheet of rubber, polypropylene (PP), or polyethylene (PE). The filler material 15 is made of foamed resin or rubber. In this embodiment, the filler material 15 is made of foamed urethane.

[0026] The base material forming bag 14 has a main body portion 40. The main body portion 40 is provided between the outer wall member 11 and the inner wall member 12. The main body portion 40 is sandwiched between the outer wall member 11 and the inner wall member 12. The main body portion 40 is filled with a filler material 15. The main body portion 40 is flexible. Therefore, the main body portion 40 is foldable before being filled with the filler material 15 (see Figure 3).

[0027] As shown in Figures 1 and 2, the main body 40 of this embodiment has an upper surface 40a, a lower surface 40b, a first opposing surface 40c, a second opposing surface 40d, and two side surfaces 40e. The first opposing surface 40c faces the indoor side surface 11a of the outer wall member 11. The second opposing surface 40d faces the outdoor side surface 12a of the inner wall member 12. The two side surfaces 40e connect the first opposing surface 40c and the second opposing surface 40d. In the following description, the horizontal direction along the first opposing surface 40c and the second opposing surface 40d is defined as the width direction of the main body 40, and the direction perpendicular to the first opposing surface 40c and the second opposing surface 40d is defined as the thickness direction of the main body 40.

[0028] The main body portion 40 has a drainage structure that guides water that has entered between the outer wall member 11 and the inner wall member 12 downward. The main body portion 40 of this embodiment has a plurality of protrusions 41 that project from the first opposing surface 40c as a drainage structure. The plurality of protrusions 41 are arranged with spacing in the vertical direction and in the width direction of the main body portion 40. The main body portion 40 of this embodiment also has an upper surface 40a as a drainage structure that is inclined to be located downward as it approaches the first opposing surface 40c.

[0029] As shown in Figure 1, the projections 41 provide a gap G between the portion of the first opposing surface 40c of the main body 40 where the projections 41 are not provided and the indoor surface 11a of the outer wall member 11. The tip of each projection 41 abuts against the indoor surface 11a of the outer wall member 11. The second opposing surface 40d of the main body 40 abuts against the outdoor surface 12a of the inner wall member 12.

[0030] The base material forming bag 14 has a cylindrical injection section 42. The injection section 42 in this embodiment is cylindrical. The injection section 42 extends from the first opposing surface 40c of the main body 40 in the thickness direction of the main body 40. The injection section 42 is connected to the inside of the main body 40. The injection section 42 is located within the through hole 11h of the outer wall member 11. The filler material 15 is filled into the main body 40 via the injection section 42.

[0031] Figure 2 shows the base material forming bag 14 before construction. In the base material forming bag 14 before construction, the length of the injection section 42 is greater than the thickness of the outer wall member 11. The injection section 42 in this embodiment is provided with a cutting acceleration section 42a. The cutting acceleration section 42a is provided in the middle of the direction in which the injection section 42 extends. The cutting acceleration section 42a is provided around the entire circumference of the injection section 42 in the circumferential direction. The cutting acceleration section 42a in this embodiment is constructed by making the thickness of the injection section 42 thinner than the thickness of other parts.

[0032] Figure 1 shows the base material forming bag 14 after construction. In the base material forming bag 14 after construction, the injection section 42 is cut by the cutting acceleration section 42a, so the length of the injection section 42 is smaller than the thickness of the outer wall member 11. The tip of the injection section 42 is located inside the through hole 11h of the outer wall member 11. The through hole 11h is sealed with sealant 16.

[0033] Although not shown in the diagram, the ancillary components are attached to the exterior wall 10 by fixing members. The fixing members penetrate the exterior wall member 11, the base material 13, and the interior wall member 12. <Method for forming base material 13> The method for forming the base material 13 includes a through-hole formation step, an insertion step, a filling step, a cutting step, and a sealing step. The formation of the base material 13 is performed by an operator.

[0034] As shown in Figure 3, the through-hole formation process is the process of forming a through-hole 11h in the outer wall member 11. The insertion process involves inserting the main body portion 40 of the base material forming bag 14 through the through hole 11h between the outer wall member 11 and the inner wall member 12, that is, into the ventilation layer 10a. The main body portion 40 is folded to a size that can pass through the through hole 11h. In its folded state, the main body portion 40 is inserted through the through hole 11h between the outer wall member 11 and the inner wall member 12.

[0035] As shown in Figure 4, with the main body 40 inserted between the outer wall member 11 and the inner wall member 12, the injection section 42 is inserted into the through hole 11h. In this embodiment, the length of the injection section 42 is greater than the thickness of the outer wall member 11. Therefore, the tip of the injection section 42 protrudes from the outdoor side surface 11b of the outer wall member 11. The cutting acceleration section 42a is located inside the through hole 11h.

[0036] The filling process involves filling the main body portion 40 of the base material forming bag 14 with filler material 15. A filling member 100 for filling the filler material 15 is attached to the tip of the injection portion 42. The filling member 100 is, for example, a spray. The filler material 15 sprayed from the filling member 100 is filled into the main body portion 40 via the injection portion 42. In this embodiment, the filler material 15 is made of foamed urethane. As a result, the filler material 15 foams up inside the main body portion 40, causing the folded main body portion 40 to expand. This forms the base material 13 between the outer wall member 11 and the inner wall member 12.

[0037] As shown in Figure 5, the cutting process is the process of cutting the injection section 42. The injection section 42 in this embodiment is provided with a cutting acceleration section 42a. Therefore, when the worker pulls the tip of the injection section 42 outwards, the injection section 42 is cut by the cutting acceleration section 42a. As a result, the new tip of the injection section 42 is located inside the through hole 11h.

[0038] The sealing process involves filling the through-hole 11h with sealing material 16 to seal the through-hole 11h. This makes it difficult for water to penetrate from the outside through the through-hole 11h between the outer wall member 11 and the inner wall member 12.

[0039] [Operation of this embodiment] The operation of this embodiment will now be explained. The base material 13 comprises a base material forming bag 14 and a filler material 15. The base material forming bag 14 has a flexible main body 40 and an injection part 42 that extends from the main body 40 and connects to the inside of the main body 40. The filler material 15 is filled into the main body 40 via the injection part 42.

[0040] Because the main body portion 40 is flexible, it can be folded to insert the main body portion 40 between the outer wall member 11 and the inner wall member 12 through the through hole 11h. Then, by filling the main body portion 40 with filler material 15 via the injection portion 42, a base material 13 can be formed between the outer wall member 11 and the inner wall member 12. Therefore, a base material 13 can be formed between the outer wall member 11 and the inner wall member 12 after the construction of the outer wall 10.

[0041] The main body 40 has a drainage structure that guides water that has entered between the outer wall member 11 and the inner wall member 12 downwards. In this embodiment, the main body 40 has a plurality of protrusions 41 that project from the first opposing surface 40c as a drainage structure. The protrusions 41 create a gap G between the first opposing surface 40c of the main body 40 and the indoor side surface 11a of the outer wall member 11. Therefore, water that has entered between the outer wall member 11 and the inner wall member 12 flows downwards through the gap G. Consequently, water that has entered between the outer wall member 11 and the inner wall member 12 is less likely to accumulate on the base material 13.

[0042] Furthermore, the main body 40 has an upper surface 40a that slopes downwards as it approaches the first opposing surface 40c, serving as a drainage structure. As a result, water adhering to the upper surface 40a of the main body 40 is guided toward the first opposing surface 40c by the sloping upper surface 40a of the main body 40, and then flows downwards through the gap G. Consequently, water that penetrates between the outer wall member 11 and the inner wall member 12 is less likely to accumulate on the base material 13.

[0043] [Effects of this embodiment] The effects of this embodiment will now be explained. (1) Since the main body 40 of the base material forming bag 14 is flexible, the main body 40 can be folded and inserted between the outer wall member 11 and the inner wall member 12 through the through hole 11h. Then, by filling the main body 40 with filler 15 through the injection part 42 of the base material forming bag 14, the base material 13 can be formed between the outer wall member 11 and the inner wall member 12. Therefore, the base material 13 can be formed between the outer wall member 11 and the inner wall member 12 after the construction of the outer wall 10.

[0044] Furthermore, the main body 40 has a drainage structure that guides water that has entered between the outer wall member 11 and the inner wall member 12 downwards, so that water that has entered between the outer wall member 11 and the inner wall member 12 does not easily accumulate on the base material 13. Therefore, water leakage into the interior can be suppressed.

[0045] (2) The main body 40 has a drainage structure which includes a plurality of protrusions 41 that protrude from the first opposing surface 40c. With this configuration, the plurality of protrusions 41 create a gap G between the first opposing surface 40c and the indoor side surface 11a of the outer wall member 11, so that water that enters between the outer wall member 11 and the inner wall member 12 flows down through the gap G. Therefore, water that enters between the outer wall member 11 and the inner wall member 12 is less likely to accumulate on the base material 13.

[0046] (3) The main body 40 has an upper surface 40a as a drainage structure, which is inclined to be located downward as it approaches the first opposing surface 40c. With this configuration, water adhering to the upper surface 40a of the main body 40 is guided toward the first opposing surface 40c by the inclined upper surface 40a of the main body 40, and then flows downward through the gap G. Therefore, water that penetrates between the outer wall member 11 and the inner wall member 12 is less likely to accumulate on the base material 13.

[0047] (4) Multiple protrusions 41 are provided on the first opposing surface 40c. In addition, the upper surface 40a of the main body 40 is inclined so as to be positioned downward towards the first opposing surface 40c. With this configuration, water that has entered between the outer wall member 11 and the inner wall member 12 can be guided to the outside, thereby further suppressing water leakage into the building.

[0048] (5) When filling the main body 40 with the filler 15 via the injection section 42, it is preferable for the tip of the injection section 42 to protrude from the outdoor surface 11b of the outer wall member 11 for better workability. In this embodiment, the length of the injection section 42 before construction is greater than the thickness of the outer wall member 11. Therefore, when the main body 40 is inserted between the outer wall member 11 and the inner wall member 12, the tip of the injection section 42 protrudes from the outdoor surface 11b of the outer wall member 11. Thus, it is easier to fill the filler 15.

[0049] On the other hand, when sealing the through hole 11h, it is easier to ensure a sufficient sealing depth if the tip of the injection section 42 is located inside the through hole 11h. In this embodiment, the injection section 42 is provided with a cutting promotion section 42a in the direction in which the injection section 42 extends. Therefore, after filling with the filler material 15, the injection section 42 can be easily cut by the cutting promotion section 42a. As the injection section 42 is cut, the new tip of the injection section 42 is located inside the through hole 11h. Therefore, it is easier to ensure a sufficient sealing depth. In this case, a sealing backup material becomes unnecessary.

[0050] (6) As a method for providing a base material between the outer wall member 11 and the inner wall member 12 after the construction of the outer wall 10, one could consider removing the outer wall member 11, providing the base material, and then reinstalling the outer wall member 11, but this would be a large-scale operation. In contrast, in this embodiment, the base material 13 can be formed without removing the outer wall member 11.

[0051] (7) As a method for attaching an accessory to the exterior wall 10 after its construction, for example, one could form a hole in the outer wall member 11 and then insert the accessory between the outer wall member 11 and the inner wall member 12 through the hole to directly fix it to the inner wall member 12. However, in this case, the hole provided in the outer wall member 11 tends to be large. In contrast, in this embodiment, the size of the through hole 11h provided in the outer wall member 11 only needs to be large enough for the folded main body 40 to pass through, so the aesthetic appearance of the outer wall member 11 is not easily reduced.

[0052] (8) As a method for forming the base material 13, for example, it is conceivable to directly inject urethane between the outer wall member 11 and the inner wall member 12 through the through hole 11h of the outer wall member 11. However, with this method, the shape of the urethane is difficult to determine, so if a depression occurs on the upper surface of the urethane, water that has entered between the outer wall member 11 and the inner wall member 12 may accumulate on top of the urethane. Also, if the amount of urethane injected is excessive, the ventilation layer 10a may be blocked by the injected urethane, which may impair the ventilation between the outer wall member 11 and the inner wall member 12.

[0053] In contrast, in this embodiment, the shape of the base material 13 is determined by the shape of the base material forming bag 14, so the shape of the base material 13 can be made such that water that has entered between the outer wall member 11 and the inner wall member 12 does not easily accumulate on top of the base material 13. Also, since the filler material 15 is filled into the main body portion 40 of the base material forming bag 14, the amount of filler material 15 can be controlled. Therefore, ventilation between the outer wall member 11 and the inner wall member 12 can be ensured.

[0054] (9) The filler material 15 of the base material 13 is made of urethane. This reduces thermal bridging compared to cases where ancillary items are directly fixed to the inner wall member 12 or wooden base material is provided, thereby improving the thermal insulation and condensation resistance of the outer wall 10.

[0055] <Example of changes> The above embodiments are examples of possible forms of the base material forming bag 14, base material 13, exterior wall 10, and the method for forming the base material 13, and are not intended to limit their form. The method for forming the base material forming bag 14, base material 13, exterior wall 10, and base material 13 may take forms different from those exemplified in the above embodiments. Examples of such forms include forms in which some of the configurations of the embodiments are replaced, modified, or omitted, or forms in which new configurations are added to the embodiments. Modifications of the embodiments are shown below.

[0056] The shape and size of the main body 40 may be changed as appropriate. In the above embodiment, the upper surface 40a of the main body 40 does not have to be inclined so as to be positioned downward toward the first opposing surface 40c. Even in this case, at least the effects (1) and (2) of the above embodiment can be obtained.

[0057] The drainage structure of the main body 40 is not limited to the structure of the above embodiment and may be modified as appropriate. [Drainage structure 1] As shown in Figure 6, the main body portion 40 may have an upper surface 40a as a drainage structure, which is inclined downward from the center of the width direction of the main body portion 40 toward each of the two side surfaces 40e.

[0058] [Drainage structure 2] The main body 40 may have an upper surface 40a as a drainage structure, which is inclined so as to be located downward from one side surface 40e to the other side surface 40e.

[0059] In drainage structures 1 and 2, water adhering to the upper surface 40a of the main body 40 is guided toward the side surface 40e of the main body 40 by the inclined upper surface 40a of the main body 40, and then flows down between the outer wall member 11 and the inner wall member 12. Therefore, water that penetrates between the outer wall member 11 and the inner wall member 12 is less likely to accumulate on the base material 13.

[0060] [Drainage structure 3] The main body portion 40 may have a plurality of protrusions 41 projecting from the second opposing surface 40d as a drainage structure. In this case as well, the same effects as those of the above embodiment (2) can be obtained.

[0061] Preferably, the main body 40 has an upper surface 40a that is inclined to be located downward as it approaches the second opposing surface 40d, as a drainage structure. In this case, the same effect as effect (3) of the above embodiment can be obtained.

[0062] [Drainage structure 4] The main body portion 40 may have a plurality of protrusions 41 that project from both the first opposing surface 40c and the second opposing surface 40d as a drainage structure. In this case, the effect (2) of the above embodiment can be obtained.

[0063] Preferably, the main body portion 40 has an upper surface 40a as a drainage structure, which is inclined so as to be located downward from the center of the main body portion 40 in the thickness direction toward the first opposing surface 40c and the second opposing surface 40d, respectively. In this case, the effect (3) of the above embodiment can be obtained.

[0064] • The length of the injection section 42 may be less than the thickness of the outer wall member 11. Even in this case, the effect (1) of the above embodiment can be obtained. The cutting promotion section 42a of the injection section 42 may be formed by making dotted line-shaped cuts in the injection section 42.

[0065] The injection section 42 does not necessarily have to be provided with a cutting acceleration section 42a. Even in this case, the effect (1) of the above embodiment can be obtained. The method for forming the base material 13 may include a step of inflating the folded main body 40 by sending air into the main body 40 through the injection part 42 before the filling step. If the filler 15 is not a foamed resin, the main body 40 cannot be inflated by utilizing the foaming of the filler 15, so it is effective to inflate the main body 40 before filling with the filler 15.

[0066] In the above embodiment, the base material 13 was formed to attach an accessory to the exterior wall 10, but it may also be formed to fix the exterior wall member 11 to the interior wall member 12 so that the cracked exterior wall member 11 does not fall off. In this case, it is not necessary to replace the cracked exterior wall member 11, thus solving the problems that arise when replacing the exterior wall member 11.

[0067] When replacing exterior wall members 11, the following problems may arise: When replacing only a portion of multiple exterior wall members 11, the aesthetic appeal of the exterior wall 10 is reduced because the color of the replaced exterior wall member 11 differs from the color of the existing exterior wall members 11 that are not being replaced. When replacing only a portion of multiple exterior wall members 11, if there is no stock of exterior wall members 11 with the same color and pattern as the existing exterior wall members 11 that are not being replaced, the aesthetic appeal of the exterior wall 10 is reduced because only the color and pattern of the replaced exterior wall member 11 differs. If all exterior wall members 11 are replaced, not just the cracked exterior wall members 11, the aesthetic appeal of the exterior wall 10 will not be reduced, but this will be costly.

[0068] <Note> This specification discloses the following technologies: [Note 1] A base material forming bag for forming a base material between an outer wall member having a through hole and an inner wall member located on the indoor side of the outer wall member, comprising a flexible main body filled with a filler, and a cylindrical injection part extending from the main body and connected to the inside of the main body, wherein the main body has a drainage structure that guides water that has entered between the outer wall member and the inner wall member downward.

[0069] [Note 2] In the base material forming bag described in Appendix 1, the main body portion has a first opposing surface facing the outer wall member and a second opposing surface facing the inner wall member, and the main body portion has a projection that protrudes from at least one of the first opposing surface and the second opposing surface as a drainage structure.

[0070] [Note 3] In the base material forming bag described in Appendix 2, the main body further has an upper surface that, as the drainage structure, is inclined so as to be located downward toward the surface on which the projection is provided, among the first opposing surface and the second opposing surface.

[0071] [Note 4] In the base material forming bag described in Appendix 1, the main body portion has a first opposing surface facing the outer wall member, a second opposing surface facing the inner wall member, and two side surfaces connecting the first opposing surface and the second opposing surface, and the main body portion has an upper surface as the drainage structure, which is inclined to be located downward toward at least one of the two side surfaces.

[0072] [Note 5] In the base material forming bag described in Appendix 1, the length of the injection section is greater than the thickness of the outer wall member, and the injection section is provided with a cutting promotion section in the direction in which the injection section extends.

[0073] [Note 6] A base material comprising a base material forming bag described in any one of the appendices 1 to 5, and a filler material filled in the main body of the base material forming bag.

[0074] [Note 7] An exterior wall comprising an outer wall member having through holes, an inner wall member located on the indoor side of the outer wall member, and a base material as described in Appendix 6 provided between the outer wall member and the inner wall member.

[0075] [Note 8] A method for forming a base material as described in Appendix 6, comprising: a through-hole forming step of forming a through-hole in the outer wall member; an insertion step of inserting the main body portion into the space between the outer wall member and the inner wall member through the through-hole in a folded state; and a filling step of filling the main body portion with the filler through the injection portion. [Explanation of symbols]

[0076] 10...Outer wall, 11...Outer wall member, 11h...Through hole, 12...Inner wall member, 13...Base material, 14...Base material forming bag, 15...Filling material, 40...Main body, 40a...Top surface, 40c...First opposing surface, 40d...Second opposing surface, 40e...Side surface, 41...Protrusion, 42...Injection part, 42a...Cutting acceleration part.

Claims

1. A base material forming bag for forming a base material between an outer wall member having a through hole and an inner wall member located on the indoor side of the outer wall member, A main body that is flexible and filled with a filler, A cylindrical injection section extending from the main body and connected to the main body, Equipped with, The main body is a base material forming bag having a drainage structure that guides water that has entered between the outer wall member and the inner wall member downwards.

2. The main body portion has a first opposing surface facing the outer wall member and a second opposing surface facing the inner wall member, The base material forming bag according to claim 1, wherein the main body portion has a projection that protrudes from at least one of the first opposing surface and the second opposing surface as a drainage structure.

3. The base material forming bag according to claim 2, wherein the main body further has an upper surface that is inclined so as to be located downward toward the surface on which the projection is provided, among the first opposing surface and the second opposing surface.

4. The main body portion has a first opposing surface facing the outer wall member, a second opposing surface facing the inner wall member, and two sides connecting the first opposing surface and the second opposing surface. The base material forming bag according to claim 1, wherein the main body portion has an upper surface that slopes downward toward at least one of the two sides as a drainage structure.

5. The length of the injection section is greater than the thickness of the outer wall member. The base material forming bag according to claim 1, wherein the injection portion is provided with a cutting promotion portion in the direction in which the injection portion extends.

6. A base material forming bag according to any one of claims 1 to 5, The filling material filled in the main body of the base material forming bag, A base material equipped with these features.

7. An outer wall member having a through hole, An inner wall member provided on the indoor side of the outer wall member, The base material according to claim 6 is provided between the outer wall member and the inner wall member, Exterior walls equipped with these features.

8. A method for forming a base material according to claim 6, The process of forming a through hole in the outer wall member, The insertion step involves inserting the main body portion, in a folded state, through the through hole between the outer wall member and the inner wall member, A filling step of filling the main body with the filler material through the injection section, A method for forming a base material that includes [a specific component].

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