Holder, insulation unit, building, and building construction method

Abstract

To provide a holder and a heat-insulating unit easily carried under a floor, a building capable of improving heat insulation under a floor, and a construction method of the building which is easy to construct when adding a heat-insulating material.SOLUTION: A holder 30 holds a first heat-insulating material in a building. The holder 30 includes a holding body part 31 for holding the first heat-insulating material. The holding body part 31 has a bag-shaped or cylindrical housing part 32 in which the first heat-insulating material is inserted. At least a part of the housing part 32 is constituted of a flexible sheet 32X.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a retainer for holding insulation material, an insulation unit, a building, and a method for constructing a building. [Background technology]

[0002] In buildings, there are known holders for placing heat insulating material under floors. For example, the holder described in Patent Document 1 attaches a mat-shaped or board-shaped heat insulating material to the underside of floor beams or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-43945 Summary of the Invention [Problem to be solved by the invention]

[0004] However, since the space under the floor is narrow, it is difficult to bring in the holding device, and therefore there is room for improvement in the holding device. [Means for solving the problem]

[0005] (1) A holder that solves the above problem is a holder that holds a first insulating material within a building, and is equipped with a holding main body that holds the first insulating material, and the holding main body has a bag-shaped or cylindrical storage portion into which the first insulating material is inserted, and at least a portion of the storage portion is made of a flexible sheet.

[0006] This configuration allows the first insulating material to be held with a simple structure. Furthermore, since the storage section is made of a flexible sheet, it can be folded. This makes it easy to transport the holder into narrow spaces in buildings. For example, the holder can be easily transported under the floor.

[0007] (2) The holder described in (1) above further includes an attachment portion provided in the housing portion, and the attachment portion is configured to be attachable to a structural material of the building. With this configuration, the holder can be easily attached to the structural material of the building.

[0008] (3) In the holder described in (2) above, the accommodating portion comprises an upper surface portion, a lower surface portion located below the upper surface portion, a first side surface portion connecting a first end of the upper surface portion to a first end of the lower surface portion, and a second side surface portion connecting a second end of the upper surface portion to a second end of the lower surface portion and provided on the opposite side of the first side surface portion, and the mounting portion includes a plate fixed to the upper surface portion, and the plate has, in a plan view, a first mounting portion protruding from a third end that intersects with the first end of the upper surface portion and a second mounting portion protruding from a fourth end of the upper surface portion opposite the third end.

[0009] With this configuration, the plate is fixed to the surface portion. Therefore, even when the storage portion is folded, the upper surface is fixed to the plate and the upper surface portion remains expanded. Therefore, the holder can be attached to a structural material of a building so that the storage portion can expand.

[0010] (4) In the fastener described in (2) above, the storage section includes an upper surface section, a lower surface section located below the upper surface section, a first side surface section connecting a first end of the upper surface section to a first end of the lower surface section, and a second side surface section connecting a second end of the upper surface section to a second end of the lower surface section and provided on the opposite side of the first side surface section, and the mounting section includes a first mounting protrusion configured as an extension of the upper surface section and extending from a third end intersecting the first end of the upper surface section, and a second mounting protrusion configured as an extension of the upper surface section and extending from a fourth end of the upper surface section opposite the third end. With this configuration, the fastener can be attached to a structural material of a building so that the storage section opens by pulling the first mounting protrusion and the second mounting protrusion away from each other.

[0011] (5) In the holder according to any one of (1) to (4) above, the housing comprises a first housing and a second housing provided below the first housing. With this configuration, an additional first insulating material can be placed below the first insulating material.

[0012] (6) An insulation unit that solves the above problem is an insulation unit installed in a building, and includes the holder according to any one of (1) to (5) above and a first insulation material held by the holder. With this configuration, the holder and the first insulation material can be carried in separately. This makes it easy to carry the insulation unit into a narrow space in a building. For example, it is easy to carry the insulation unit under a floor.

[0013] (7) A building that solves the above problem includes the heat insulation unit described in (6) above. With this configuration, the heat insulation under the floor can be improved.

[0014] (8) The building described in (7) above further includes a plurality of underfloor beams arranged parallel to one another, a second insulating material is arranged between the underfloor beams among the plurality of underfloor beams, and the retainer holds the first insulating material so that the first insulating material is located below the second insulating material. This configuration can improve the thermal insulation of the underfloor.

[0015] (9) In the building described in (8) above, the retainer is fixed to the underfloor cross member via a mounting bracket, and the mounting bracket has a fixing portion fixed to the underfloor cross member and an extension portion extending from the fixing portion, and the extension portion is provided with an engaging portion with which a part of the retainer engages. With this configuration, the retainer can be attached to the underfloor cross member via the mounting bracket. This makes it easy to attach the retainer to the underfloor cross member.

[0016] (10) In the building described in (8) or (9) above, the first insulating material is arranged so as to span two or more of the retainers. With this configuration, the installation state of the first insulating material can be stabilized.

[0017] (11) In the building described in (10) above, the plurality of retainers are arranged to form a plurality of rows, each of the rows extending so as to intersect with the underfloor cross member, the plurality of retainers constituting the row are arranged so that the open ends of the retainers face the same direction, and the first insulating material is inserted through two or more of the plurality of retainers in the row. With this configuration, the plurality of retainers form a row, so that the plurality of first insulating materials can be efficiently placed under the floor.

[0018] (12) A method for constructing a building to add a first insulating material under the floor, comprising the steps of attaching the retainer according to any one of (1) to (5) above to an underfloor cross member and inserting the first insulating material into the receiving portion of the retainer. This configuration makes it easy to add insulating material to a building. [Effects of the Invention]

[0019] According to the technology disclosed herein, it is possible to provide a holder and an insulation unit that can be easily transported into a narrow space. According to the building, it is possible to improve the insulation performance under the floor. According to the building construction method, it is easy to install additional insulation material in the building. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic diagram of a building. [Figure 2] FIG. 2 is a perspective view showing the positional relationship between a first insulating material and a second insulating material. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 10 is a diagram of a retainer attached to an underfloor cross member via a mounting bracket. [Figure 6] FIG. 4 is a plan view showing the arrangement of the retainers and the first insulating material under the floor. [Figure 7] FIG. 7 is a cross-sectional view of the underfloor insulation structure taken along line 7-7 in FIG. 6. [Figure 8] FIG. 8 is a cross-sectional view of the underfloor insulation structure taken along line 8-8 in FIG. 6. [Figure 9] FIG. 10 is a perspective view of a first modified example of the holder. [Figure 10] FIG. 10 is a perspective view of a second modified example of the holder. DETAILED DESCRIPTION OF THE INVENTION

[0021] 1 to 8, a building 1, a heat insulating unit 11, a retaining device 30, and a method for constructing the building 1 will be described. As shown in FIG. 1, the building 1 of this embodiment has a heat insulating structure 10 under the floor. The lowest part of the heat insulating structure 10 is formed by the heat insulating unit 11. The heat insulating unit 11 is formed by a first insulating material 15 and a retaining device 30 (see FIG. 3).

[0022] [Buildings] Examples of the building 1 in this embodiment include a detached house, an apartment building, a commercial facility, and a public facility. In this embodiment, the building 1 is a single-family home.

[0023] The building 1 comprises a foundation 2 and a building main body 3 mounted on the foundation 2. The building main body 3 comprises a skeleton 4. The skeleton 4 forms the framework of the building main body 3. The skeleton 4 is made of structural materials. The skeleton 4 comprises at least underfloor beams 5 (also called "joists"). The underfloor beams 5 are arranged parallel to each other under the floor. The underfloor beams 5 support the first floor. In this embodiment, the first floor refers to the lowest above-ground floor of the building 1. The underfloor beams 5 are made of square steel pipes, H-shaped steel, or wooden square columns. In this embodiment, the underfloor beams 5 are made of square steel pipes. Grooves 5X are provided on the sides of the square steel pipes (see Figure 5).

[0024] Subfloor materials 6 (also called "joists") are provided on the multiple underfloor cross members 5. The subfloor materials 6 are arranged at equal intervals on the multiple underfloor cross members 5 so as to intersect with the multiple underfloor cross members 5. The subfloor materials 6 are made up of members that are thinner than the underfloor cross members 5. Floor materials 7 are provided on top of the subfloor materials 6.

[0025] The building body 3 further includes an insulation unit 11. The insulation unit 11 constitutes part of the underfloor insulation structure 10. The insulation unit 11 insulates the underfloor of the building body 3. The insulation unit 11 is disposed in an underfloor space 12 (see FIG. 7) between the foundation 2 and the underfloor beams 5.

[0026] As shown in Figures 2, 7 and 8, first insulating materials 15 are placed under the multiple underfloor beams 5. This provides insulation under the floor. The first insulating materials 15 are placed so as to intersect with the underfloor beams 5. Note that in Figure 2, the retainers 30 and mounting brackets 60 are omitted.

[0027] As shown in Fig. 7, second insulating materials 16 are arranged between the plurality of underfloor cross members 5. This further insulates the underfloor.

[0028] 8, third insulating materials 17 are arranged between the plurality of underfloor materials 6. This provides insulation directly below the floor material 7.

[0029] [Insulation unit] The insulation unit 11 is provided in the building 1. The insulation unit 11 includes a holder 30 and a first insulation material 15. The first insulation material 15 is held by the holder 30.

[0030] The insulation unit 11 is assembled in the following steps. In the first step, the holder 30 is attached to the underfloor cross member 5. At this time, the holder 30 is attached to the underfloor cross member 5 so that the first opening end 37 and the second opening end 38 are open. Then, in the second step, the first insulation material 15 is held by the holder 30. Specifically, the first insulation material 15 is inserted into the storage portion 32 (see below) of the holder 30. In this way, the insulation unit 11 is assembled under the floor of the building 1.

[0031] [Holder] The holder 30 will be described with reference to Figure 3. The holder 30 holds the first insulating material 15 so that the first insulating material 15 is located below the second insulating material 16 (see Figures 2 and 5).

[0032] The holder 30 holds the first insulating material 15 in the underfloor space 12 inside the building 1. The holder 30 includes a holding body 31 that holds the first insulating material 15.

[0033] The holding body 31 has a storage portion 32. The storage portion 32 is configured in a bag-like or cylindrical shape so that the first insulating material 15 can be inserted therein. In this embodiment, the storage portion 32 is configured as a cylinder extending in the insertion direction DX. The insertion direction DX is the direction in which the first insulating material 15 enters the storage portion 32.

[0034] The accommodation section 32 includes an upper surface section 33, a lower surface section 34, a first side surface section 35, and a second side surface section 36. The accommodation section 32 has a first opening end 37 and a second opening end 38 that open in the insertion direction DX. The second opening end 38 is located on the opposite side of the accommodation section 32 from the first opening end 37.

[0035] The upper surface portion 33 is rectangular in plan view. In plan view, the upper surface portion 33 has a first end 41, which is the portion of the upper surface portion 33 where the first side surface portion 35 is connected, and a second end 42 opposite the first end 41. Furthermore, the upper surface portion 33 has a third end 43 that intersects with the first end 41, and a fourth end 44 on the upper surface portion 33 opposite the third end 43. In plan view, the third end 43 is located at the same position as the first opening end 37. In plan view, the fourth end 44 is located at the same position as the second opening end 38. The lower surface portion 34 is located below the upper surface portion 33 with a space between them.

[0036] In a plan view, the lower surface portion 34 has a first end 45, which is a portion of the lower surface portion 34 where the first side surface portion 35 is connected, and a second end 46 opposite the first end 45. The first side surface portion 35 connects the first end 41 of the upper surface portion 33 to the first end 45 of the lower surface portion 34. The second side surface portion 36 connects the second end 42 of the upper surface portion 33 to the second end 46 of the lower surface portion 34. The second side surface portion 36 is provided on the opposite side of the upper surface portion 33 from the first side surface portion 35 in a plan view.

[0037] At least a portion of the storage section 32 is made of a flexible sheet 32X. The entire storage section 32 may be made of the flexible sheet 32X. Alternatively, only the portion of the storage section 32 that supports the first insulating material 15 from below may be made of the flexible sheet 32X. The flexible sheet 32X is made of a flexible sheet-like material, such as a resin sheet or a cloth sheet. The flexible sheet 32X may include a wire for adjusting the shape of the storage section 32. For example, the wire is made to have the same shape as the opening of the storage section 32. The wire is provided in the middle of the storage section 32. The wire may be made of a material that easily returns to its original shape after being deformed.

[0038] In this embodiment, the cross section of the accommodation portion 32 perpendicular to the insertion direction DX is rectangular when the retainer 30 is attached to the underfloor cross member 5. Also, the cross section of the first insulating material 15 perpendicular to the insertion direction DX is rectangular.

[0039] The storage section 32 is configured to have a size that allows one or more first insulating materials 15 to be inserted therethrough. Specifically, in one example, the storage section 32 is configured to be able to store two first insulating materials 15 arranged side by side. In another example, the storage section 32 is configured to be able to store one first insulating material 15.

[0040] In order to lay the first insulating material 15 under the floor without any gaps, two or more types of holders 30 with different sizes of receiving portions 32 may be prepared.

[0041] [Holder mounting part] The holder 30 includes a mounting portion 50 for mounting the holder 30 under the floor of the building main body 3. The mounting portion 50 is provided in the accommodation portion 32. The mounting portion 50 is configured so as to be mountable to a structural material of the building 1. In this embodiment, the mounting portion 50 includes a plate 51 fixed to the upper surface portion 33. The plate 51 is made of a metal plate, a wooden plate, or a resin plate.

[0042] The plate 51 has a plate main body 52 fixed to the upper surface 33, a first mounting portion 53, and a second mounting portion 54. The first mounting portion 53 and the second mounting portion 54 are configured as portions extending from the plate main body 52.

[0043] 3, the first mounting portion 53 protrudes from the third end 43 of the top surface portion 33 in a plan view. The first mounting portion 53 extends outward from the first open end 37 in the insertion direction DX in a plan view. Here, "outward" refers to the direction opposite to "inward," with the direction from the first open end 37 into the housing portion 32 being defined as "inward." The first mounting portion 53 is provided with an engaging portion 53A that engages with the mounting bracket 60. The engaging portion 53A is configured as a bolt hole through which a bolt is inserted.

[0044] The second mounting portion 54 protrudes from the fourth end 44 of the top surface portion 33 in a plan view. The second mounting portion 54 extends outward from the second open end 38 in the insertion direction DX in a plan view. Here, "outward" refers to the direction opposite to "inward," with the direction from the second open end 38 into the housing portion 32 being defined as "inward." The second mounting portion 54 is provided with an engaging portion 54A that engages with the mounting bracket 60. The engaging portion 54A is configured as a bolt hole through which a bolt is inserted.

[0045] 5, the mounting portion 50 is configured so that the accommodation portion 32 can be disposed between the two underfloor beams 5 in a plan view. The first mounting portion 53 is fixed directly or indirectly to one of the two underfloor beams 5. The second mounting portion 54 is fixed directly or indirectly to the other of the two underfloor beams 5.

[0046] 5, the mounting portion 50 is configured so as to be able to be placed in the space between two underfloor beams 5. Specifically, the length of the plate 51 along the insertion direction DX is slightly shorter than the distance between the two underfloor beams 5.

[0047] [Mounting bracket] 4 and 5, the mounting bracket 60 will be described. The retainer 30 is fixed to the underfloor beam 5 via the mounting bracket 60. The mounting bracket 60 has a fixing portion 61 that is fixed to the underfloor beam 5 and an extension portion 62 that extends from the fixing portion 61.

[0048] The fixing portion 61 includes a first engagement portion 63 that engages with a first side surface 5A of the underfloor cross member 5, a second engagement portion 64 that engages with a second side surface 5B of the underfloor cross member 5 opposite the first side surface 5A, and a connecting portion 65 that connects the first engagement portion 63 and the second engagement portion 64.

[0049] The first engagement portion 63 rises perpendicular to the connecting portion 65 at a fifth end 65A of the connecting portion 65. The second engagement portion 64 rises perpendicular to the connecting portion 65 at a sixth end 65B of the connecting portion 65 opposite the fifth end 65A, and is configured parallel to the first engagement portion 63.

[0050] The first engagement portion 63 and the second engagement portion 64 have protrusions 63A, 64A that fit into the grooves 5X of the underfloor cross member 5. The fixing portion 61 is fixed to the underfloor cross member 5 by fitting the protrusions 63A of the first engagement portion 63 and the protrusions 64A of the second engagement portion 64 into the grooves 5X.

[0051] The extension portion 62 includes a first extension portion 71 and a second extension portion 72. The first extension portion 71 is connected to a seventh end 65C that intersects with the fifth end 65A of the connecting portion 65. The first extension portion 71 is provided at the same height as the connecting portion 65 in a side view. The first extension portion 71 extends in both directions along a line parallel to the seventh end 65C in a side view. Specifically, the first extension portion 71 extends so as to protrude from the first engagement portion 63 and so as to protrude from the second engagement portion 64 in a side view.

[0052] The second extension portion 72 is connected to an eighth end 65D of the connecting portion 65, which is opposite the seventh end 65C. The second extension portion 72 is provided at the same height as the connecting portion 65 in a side view. The second extension portion 72 extends in both directions along a line parallel to the eighth end 65D in a side view. Specifically, the second extension portion 72 extends so as to protrude from the first engagement portion 63 and so as to protrude from the second engagement portion 64 in a side view.

[0053] When the mounting bracket 60 is attached to the underfloor cross member 5, the extension portion 62 is located at the same height as the bottom surface of the underfloor cross member 5 or lower than the underfloor cross member 5. When the mounting bracket 60 is attached to the underfloor cross member 5, the first extension portion 71 protrudes from the first side surface 5A and the second side surface 5B of the underfloor cross member 5 in a plan view. When the mounting bracket 60 is attached to the underfloor cross member 5, the second extension portion 72 protrudes from the first side surface 5A and the second side surface 5B of the underfloor cross member 5 in a plan view.

[0054] The extension portion 62 is provided with an engagement portion 62A that engages with the first attachment portion 53 or the second attachment portion 54 of the holder 30. The engagement portion 62A is configured as a bolt hole through which a bolt is inserted.

[0055] [Fixing the holder] The retainers 30 are fixed to the underfloor beams 5 as follows: Two mounting brackets 60 are fixed to each of the two underfloor beams 5 (see FIG. 5). The two mounting brackets 60 on each underfloor beam 5 are spaced apart by a distance slightly shorter than the distance between the first end 41 and the second end 42 of the upper surface portion 33 of the retainer 30.

[0056] As shown in Fig. 5, the retainer 30 is disposed between two underfloor beams 5. A first mounting portion 53 of the retainer 30 is fixed with a bolt to the extension portion 62 of each of two mounting brackets 60 fixed to one of the two underfloor beams 5. A second mounting portion 54 of the retainer 30 is fixed with a bolt to the extension portion 62 of each of two mounting brackets 60 fixed to the other of the two underfloor beams 5. Note that the bolts are not shown in Fig. 5.

[0057] In short, the retainer 30 is fixed between two underfloor beams 5 so that each of the four corners of the retainer 30 is supported by the underfloor beams 5 in a plan view.

[0058] [Placement of first insulation material in underfloor space and construction method for building] The arrangement of the first insulating material 15 in the underfloor space 12 will be described with reference to Figure 6. In Figure 6, the first insulating material 15 is shown by a two-dot chain line. The housing portion 32 of the retainer 30 is shown by a solid line. In addition, the inspection hatch 9 for inspecting the underfloor space is shown by a one-dot chain line.

[0059] When the first insulating material 15 is to be added to the underfloor space 12, the holder 30 and the first insulating material 15 are carried into the underfloor space through the inspection hatch 9.

[0060] As shown in FIG. 6, multiple retainers 30 are attached to the underfloor cross members 5 to form multiple rows. In FIG. 6, the rows extend horizontally. The multiple rows are arranged vertically. The opening ends of the retainers 30 face in the direction of extension of the rows. The direction of extension of the rows coincides with the insertion direction DX.

[0061] Each of the multiple rows extends so as to intersect with the underfloor beams 5. Specifically, each of the multiple rows extends so as to be perpendicular to the underfloor beams 5. The first insulating material 15 is arranged so as to span two or more retainers 30, and is inserted into the accommodating portions 32 of the retainers 30. In this way, the first insulating materials 15 are arranged so as to intersect with the extension direction of the underfloor beams 5. The multiple retainers 30 may be arranged so that the side surfaces (specifically, the first side surface portion 35 or the second side surface portion 36) of vertically adjacent retainers 30 are in contact with each other.

[0062] [Operation of this embodiment] The holder 30 has a storage section 32 into which the first insulating material 15 is inserted. The storage section 32 is made of a flexible sheet 32X. Therefore, the storage section 32 can be folded and easily carried into the underfloor space 12 through an inspection hatch 9 provided in the floor. In addition, the mounting bracket 60 holds the first insulating material 15 so that the first insulating material 15 is positioned below the second insulating material 16. This allows the underfloor insulating structure 10 to be thicker.

[0063] Specifically, in the retainer 30, a plate 51 is fixed to the upper surface portion 33 of the accommodation portion 32. A first mounting portion 53 and a second mounting portion 54 are provided on the plate 51. The accommodation portion 32 is arranged below the plate 51. Therefore, by attaching the plate 51 near the bottom surface of the underfloor cross member 5, the accommodation portion 32 can be arranged below the underfloor cross member 5. This allows the first insulation material 15 to be arranged below the second insulation material 16, which is at the same height as the underfloor cross member 5.

[0064] [Effects of this embodiment] The effects of this embodiment will be described. (1) The holder 30 includes a holder body 31. The holder body 31 has a bag-shaped or cylindrical storage portion 32 into which the first insulating material 15 is inserted. The storage portion 32 is made of a flexible sheet 32X. This configuration allows the first insulating material 15 to be held with a simple structure. Furthermore, because the storage portion 32 is made of a flexible sheet 32X, it can be folded. This makes it easy to transport into narrow spaces in the building 1. For example, it can be easily transported under the floor.

[0065] (2) The holder 30 includes an attachment portion 50. The attachment portion 50 is configured to be attachable to the underfloor beam 5 of the building 1. With this configuration, the holder 30 can be easily attached to the underfloor beam 5 of the building 1.

[0066] (3) The mounting portion 50 of the holder 30 includes a plate 51 fixed to the upper surface portion 33. In a plan view, the plate 51 has a first mounting portion 53 protruding from the third end 43 of the upper surface portion 33 and a second mounting portion 54 protruding from the fourth end 44 of the upper surface portion 33.

[0067] According to this configuration, the plate 51 is fixed to the upper surface portion 33. Therefore, the upper surface portion 33 remains expanded even when the storage portion 32 is folded. When the upper surface portion 33 is placed in a predetermined position, the lower surface portion 34 moves downward due to gravity, and the storage portion 32 expands. In this way, the holder 30 can be attached to the underfloor cross member 5 of the building 1 so that the storage portion 32 expands.

[0068] (4) The insulation unit 11 includes the above-described holder 30 and the first insulation material 15 held by the holder 30. With this configuration, the holder 30 and the first insulation material 15 can be transported separately. This makes it easy to transport the insulation unit 11 into a narrow space in the building 1. For example, it is easy to transport the insulation unit 11 under the floor.

[0069] (5) The building 1 includes a heat insulating unit 11. This configuration improves the heat insulating properties under the floor of the building 1.

[0070] (6) In the building 1, second insulating materials 16 are arranged between the underfloor beams 5 among the multiple underfloor beams 5. The retaining fixture 30 holds the first insulating materials 15 so that the first insulating materials 15 are positioned below the second insulating materials 16. This configuration can improve the thermal insulation under the floor.

[0071] (7) In the building 1, the retainer 30 is fixed to the underfloor beam 5 via a mounting bracket 60. The mounting bracket 60 has a fixing portion 61 that is fixed to the underfloor beam 5, and an extension portion 62. The extension portion 62 extends from the fixing portion 61 so as to be positioned at the same height as the bottom surface of the underfloor beam 5 or lower than the underfloor beam 5. The extension portion 62 is provided with an engagement portion 62A that engages with a part of the retainer 30. With this configuration, the retainer 30 can be attached to the underfloor beam 5 via the mounting bracket 60. This makes it easy to attach the retainer 30 to the underfloor beam 5.

[0072] (8) In the building 1, the first insulating material 15 is arranged so as to span two or more holders 30. With this configuration, the first insulating material 15 can be installed stably.

[0073] (9) In the building 1 described in (8) above, the multiple retainers 30 are arranged to form multiple rows. Each of the multiple rows extends so as to intersect with the underfloor cross members 5. The multiple retainers 30 forming a row are arranged so that the first open end 37 and the second open end 38 of the retainers 30 face in the same direction. The first insulating material 15 is inserted through two or more of the multiple retainers 30 in a row. With this configuration, the multiple retainers 30 form a row, so that the multiple first insulating materials 15 can be efficiently arranged under the floor.

[0074] (10) The construction method for the building 1 includes the steps of attaching the retainer 30 to the underfloor cross member 5 and inserting the first insulating material 15 into the storage portion 32 of the retainer 30. This configuration makes it easy to install the first insulating material 15 when adding it to the building 1. Specifically, the storage portion 32 of the retainer 30 is made of a flexible sheet 32X, so the retainer 30 can be easily carried under the floor through the inspection hatch 9. Furthermore, the first insulating material 15 can be placed under the floor simply by inserting the first insulating material 15 into the storage portion 32.

[0075] <Modification> The above-described embodiments are examples of possible forms of the holder 30, the insulation unit 11, the building 1, and the construction method of the building 1, and are not intended to limit the forms. The holder 30, the insulation unit 11, the building 1, and the construction method of the building 1 may take forms different from those exemplified in the above-described embodiments. Examples of such forms include forms in which part of the configuration of the embodiments is replaced, modified, or omitted, or forms in which a new configuration is added to the embodiments. Modified examples of the embodiments are shown below.

[0076] As shown in FIG. 9 , the housing 32 may have two or more independent sections that can stack and accommodate the first insulating material 15. In one example, the housing 32 includes a first housing section 32A and a second housing section 32B. The second housing section 32B is provided below the first housing section 32A. The upper surface of the second housing section 32B is overlapped on the lower surface of the first housing section 32A. The upper surface of the second housing section 32B is joined to the lower surface of the first housing section 32A by adhesive bonding, fusion, or sewing. This configuration allows additional first insulating material 15 to be placed below the first insulating material 15.

[0077] As shown in FIG. 10 , the mounting portion 50 may be configured as an extension extending from the top surface 33 of the storage portion 32. For example, the mounting portion 50 has a first mounting protrusion 81 and a second mounting protrusion 82. The first mounting protrusion 81 extends from the top surface 33 of the storage portion 32. The first mounting protrusion 81 extends from the third end 43 of the top surface 33. The second mounting protrusion 82 extends from the top surface 33 of the storage portion 32. The second mounting protrusion 82 extends from the fourth end 44 of the top surface 33. With this configuration, the retainer 30 can be attached to a structural material of the building 1 so that the storage portion 32 opens by pulling the first mounting protrusion 81 and the second mounting protrusion 82 away from each other.

[0078] In the above embodiment, the underfloor beams 5 are square steel pipes, and therefore the mounting brackets 60 are used. Similar mounting brackets 60 can be used when the underfloor beams 5 are wooden square columns. On the other hand, when the underfloor beams 5 are H-shaped steel, the mounting brackets 60 may be omitted. In this case, the first mounting portion 53 and the second mounting portion 54 of the plate 51 are fixed directly or indirectly to the flanges of the H-shaped steel.

[0079] Furthermore, in the above embodiment, the engaging portion 53A of the first mounting portion 53 and the engaging portion 54A of the second mounting portion 54 of the retainer 30, and the engaging portion 62A of the extension portion 62 of the mounting bracket 60 are configured as bolt holes through which bolts are inserted, but the configurations of the engaging portions 53A, 54A, and 62A are not limited to this. For example, the engaging portion 62A may be configured as a protrusion that protrudes upward when the mounting bracket 60 is fixed to the underfloor cross member 5, and the engaging portions 53A and 54A may be configured as through-holes through which the protrusion can be inserted.

[0080] In the above embodiment, the insulation unit 11 is placed in the underfloor space 12 between the foundation 2 and the underfloor beams 5 to insulate the underfloor space of the building body 3, but the placement of the insulation unit 11 is not limited to this. The insulation unit 11 may also be placed under the floor of the second or higher floor.

[0081] This specification discloses the following techniques: [Appendix 1] Supplementary note 1 relates to a holder. The holder is a holder for holding a first insulating material inside a building, and includes a holding body portion for holding the first insulating material. The holding body portion has a bag-shaped or tubular storage portion into which the first insulating material is inserted. At least a portion of the storage portion is made of a flexible sheet.

[0082] [Appendix 2] The fastener of Supplementary Note 1 further comprises an attachment part provided in the accommodation part, the attachment part being configured to be attachable to a structural material of the building.

[0083] [Appendix 3] In the holder described in Supplementary Note 2, the accommodation portion includes an upper surface portion, a lower surface portion located below the upper surface portion, a first side surface portion connecting a first end of the upper surface portion to a first end of the lower surface portion, and a second side surface portion connecting a second end of the upper surface portion to a second end of the lower surface portion and provided on the opposite side of the first side surface portion. The attachment portion includes a plate fixed to the upper surface portion. The plate has, in a plan view, a first attachment portion protruding from a third end that intersects with the first end of the upper surface portion, and a second attachment portion protruding from a fourth end of the upper surface portion opposite the third end.

[0084] [Appendix 4] In the holder described in Supplementary Note 2, the accommodating portion comprises an upper surface portion, a lower surface portion located below the upper surface portion, a first side surface portion connecting a first end of the upper surface portion to a first end of the lower surface portion, and a second side surface portion connecting a second end of the upper surface portion to a second end of the lower surface portion and provided on the opposite side of the first side surface portion. The mounting portion has a first mounting protrusion configured as an extension of the upper surface portion and extending from a third end intersecting the first end of the upper surface portion, and a second mounting protrusion configured as an extension of the upper surface portion and extending from a fourth end of the upper surface portion opposite the third end.

[0085] [Appendix 5] In the holder described in Supplementary Note 1, the housing portion includes a first housing portion and a second housing portion provided below the first housing portion.

[0086] [Appendix 6] Supplementary Note 6 is an insulating unit that is installed in a building and includes the holder according to any one of Supplementary Notes 1 to 5 and a first insulating material held by the holder.

[0087] [Appendix 7] Appendix 7 is a building. The building is equipped with an insulation unit as described in Appendix 6.

[0088] [Appendix 8] The building described in Appendix 7 further includes a plurality of underfloor beams arranged parallel to one another. Second insulating material is arranged between the underfloor beams. The retainer holds the first insulating material so that the first insulating material is located below the second insulating material.

[0089] [Appendix 9] In the building described in Appendix 8, the retainer is fixed to the underfloor beam via a mounting bracket. The mounting bracket has a fixing portion fixed to the underfloor beam and an extension portion extending from the fixing portion. The extension portion is provided with an engagement portion with which a part of the retainer engages.

[0090] [Appendix 10] In the building described in Appendix 8, the first insulating material is arranged so as to span two or more of the holders.

[0091] [Appendix 11] In the building described in Appendix 10, the plurality of retainers are arranged to form a plurality of rows. Each of the plurality of rows extends so as to intersect the underfloor cross member. The plurality of retainers forming the row are arranged so that the open ends of the retainers face in the same direction. The first insulating material is inserted through two or more of the plurality of retainers in the row.

[0092] [Appendix 12] Supplementary note 12 is a method for constructing a building, which is a method for constructing a building for adding a first insulating material under the floor, and includes the steps of attaching the retainer according to any one of Supplementary notes 1 to 5 to an underfloor cross member, and inserting the first insulating material into the receiving portion of the retainer. [Explanation of symbols]

[0093] 1...building, 5...underfloor cross member, 11...insulation unit, 15...first insulation material, 16...second insulation material, 30...retaining device, 31...retaining main body portion, 32...accommodation portion, 32A...first accommodation portion, 32B...second accommodation portion, 32X...flexible sheet, 33...upper surface portion, 34...lower surface portion, 35...first side portion, 36...second side portion, 41...first end, 42...second end, 43...third end, 44...fourth end, 45...first end, 46...second end, 50...mounting portion, 51...plate, 53...first mounting portion, 54...second mounting portion, 60...mounting bracket, 61...fixing portion, 62...extension portion, 81...first mounting protrusion, 82...second mounting protrusion.

Claims

1. A holder for holding a first insulating material in a building, a holding body portion that holds the first insulating material; and an attachment portion; the holding body portion has a bag-shaped or cylindrical containing portion into which the first insulating material is inserted, At least a portion of the storage section is formed by a flexible sheet, The mounting portion is provided in the housing portion and is configured to be mountable to a structural material of the building. Retainer.

2. the storage section includes an upper surface section, a lower surface section located below the upper surface section, a first side surface section connecting a first end of the upper surface section and a first end of the lower surface section, and a second side surface section connecting a second end of the upper surface section and a second end of the lower surface section and being provided on the opposite side of the first side surface section; the mounting portion includes a plate fixed to the upper surface portion, The plate has, in a plan view, a first mounting portion protruding from a third end of the upper surface portion that intersects with the first end, and a second mounting portion protruding from a fourth end of the upper surface portion that is opposite to the third end. The holder of claim 1 .

3. the storage section includes an upper surface section, a lower surface section located below the upper surface section, a first side surface section connecting a first end of the upper surface section and a first end of the lower surface section, and a second side surface section connecting a second end of the upper surface section and a second end of the lower surface section and being provided on the opposite side of the first side surface section; The mounting portion is a first mounting projection configured as an extension of the top surface portion and extending from a third end of the top surface portion intersecting the first end; a second mounting protrusion configured as an extension of the upper surface portion and extending from a fourth end of the upper surface portion opposite the third end; The holder of claim 1 .

4. The housing portion includes a first housing portion and a second housing portion provided below the first housing portion. The holder of claim 1 .

5. An insulation unit installed in a building, The holding device according to any one of claims 1 to 4 and a first insulating material held by the holding device, Insulation unit.

6. A building equipped with an insulation unit as described in claim 5.

7. Further provided is a plurality of underfloor cross members arranged parallel to each other, A second insulating material is disposed between the underfloor cross members in the plurality of underfloor cross members, the holder holds the first insulating material so that the first insulating material is positioned below the second insulating material. The building according to claim 6.

8. The retainer is fixed to the underfloor cross member via a mounting bracket, The mounting bracket has a fixing portion that is fixed to the underfloor cross member and an extension portion that extends from the fixing portion, The extension portion is provided with an engagement portion with which a part of the retainer engages. The building according to claim 7.

9. The first insulating material is arranged to span two or more of the holders. The building according to claim 7.

10. The plurality of holders are arranged to form a plurality of rows, Each of the plurality of rows extends so as to intersect with the underfloor cross member, The plurality of holders constituting the row are arranged so that the open ends of the holders face the same direction, The first insulating material is inserted through two or more of the plurality of retainers in the row. The building according to claim 9.

11. A construction method for a building that adds a first insulation material under the floor, a step of attaching the retainer according to any one of claims 1 to 4 to an underfloor cross member; Inserting a first insulating material into the receiving portion of the holder, Construction methods for buildings.

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