Thermal insulation structure

Abstract

This provides an insulating structure that ensures thermal insulation performance under the beams while minimizing obstruction to passage in the underfloor space. [Solution] The insulation structure comprises a rising section 22 of the foundation (strip foundation 20), a plurality of floor beams (beams 12B) that span the rising section 22 and are positioned away from the ground surface G, flooring material 30 that spans the floor beams, a first insulation material (insulation material 40, 42) that covers the underside of the flooring material 30, and a second insulation material (insulation material 44) that is softer than the first insulation material and is positioned to cover at least the lower end surface of the floor beams.

Description

Technical Field

[0001] The present invention relates to a heat insulation structure.

Background Art

[0002] Patent Document 1 below shows a configuration in which a floor heat insulation material is disposed below a floor underlay panel between adjacent floor joists, and the floor joists are covered with a foamed resin molded body.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When covering the lower surface of a floor beam with a foamed resin molded body as shown in Patent Document 1 above, the dimensions of the under-floor space become smaller compared to the case where it is not covered. In particular, when covering the lower surface of a large beam, there is a risk of hindering the passage of workers during under-floor inspection.

[0005] In consideration of the above facts, the present disclosure aims to provide a heat insulation structure that can secure the heat insulation performance under a beam and is unlikely to hinder passage in the under-floor space.

Means for Solving the Problems

[0006] The heat insulation structure of the first aspect includes a rising portion of a foundation, a plurality of floor beams spanned over the rising portion and spaced apart from concrete placed on the ground surface or the ground surface, a floor material spanned over the floor beams, a first heat insulation material covering the lower surface of the floor material, and a second heat insulation material covering at least the lower end surface of the floor beam and being softer than the first heat insulation material.

[0007] In the first embodiment of the thermal insulation structure, the underside of the floor beams, which are positioned at a distance from the ground surface or concrete poured onto the ground surface, is covered by a second thermal insulation material. This second thermal insulation material is softer than the first thermal insulation material that covers the underside of the flooring material positioned above the floor beams.

[0008] Therefore, compared to a case where the second insulation material has the same hardness as the first insulation material, the second insulation material is easier to compress and less likely to obstruct passage in the underfloor space.

[0009] The second embodiment of the thermal insulation structure is the thermal insulation structure described in the first embodiment, wherein the floor beam is the lower beam among the beams that span above and below the column and constitute a frame-shaped building unit, and the second thermal insulation material is arranged across each of the floor beams in the adjacent building units.

[0010] In the second embodiment of the thermal insulation structure, the second thermal insulation material, which is softer than the first thermal insulation material, is placed across adjacent building units, making it easier to move between the underfloor spaces of the building units.

[0011] The third embodiment of the thermal insulation structure is the thermal insulation structure described in the first or second embodiment, wherein the floor beam is channel steel, the first thermal insulation material includes sprayed thermal insulation material, and the second thermal insulation material is a fibrous thermal insulation material laid from the lower surface to the upper surface of the lower flange of the channel steel.

[0012] In the third embodiment of the thermal insulation structure, the second thermal insulation material is laid from the lower surface to the upper surface of the lower flange of the channel steel, resulting in higher thermal insulation performance compared to the case where only the lower surface is covered. Furthermore, since the second thermal insulation material is a fibrous thermal insulation material, it is easier to compress compared to foamed thermal insulation material, and it easily returns to its original shape after being compressed.

[0013] The fourth embodiment of the thermal insulation structure is the thermal insulation structure described in the second embodiment, wherein three or more building units are arranged in a row, the second thermal insulation material is arranged in a part of the axial direction of the floor beam, and is arranged in the same axial position in each of the building units.

[0014] In the fourth embodiment of the insulation structure, the second insulation material is placed in a portion of the axial direction of the floor beam, so compared to the case where it is placed throughout, the area where the first insulation material, which is spray-on insulation, is laid is wider and the workability is improved.

[0015] Furthermore, since the second insulation material is positioned at the same location along the axial direction of the floor beams in multiple building units, it can move linearly through the underfloor space of multiple building units. [Effects of the Invention]

[0016] According to this disclosure, it is possible to ensure thermal insulation performance under the beams while minimizing obstruction to passage in the underfloor space. [Brief explanation of the drawing]

[0017] [Figure 1] This is a plan view showing a building to which the thermal insulation structure according to the embodiment of this disclosure is applied. [Figure 2A] This is a cross-sectional view along line AA in Figure 1. [Figure 2B] This is a cross-sectional view along line BB in Figure 1. [Modes for carrying out the invention]

[0018] The following describes an embodiment of the present invention's thermal insulation structure with reference to the drawings. Components indicated by the same reference numerals in each drawing are considered to be the same component. However, unless otherwise specified in the specification, each component is not limited to one, and there may be multiple such components.

[0019] Furthermore, explanations of identical components and reference numerals in each drawing may be omitted. This disclosure is not limited to the following embodiments, and modifications can be made as appropriate within the scope of the purpose of this disclosure, such as omitting components, substituting different components, or combining one embodiment with various modifications.

[0020] In each drawing, the directions indicated by the arrows X and Y are directions along the horizontal plane and are perpendicular to each other. Also, the direction indicated by the arrow Z is the direction along the vertical direction (up and down). In each drawing, the directions indicated by the arrows X, Y, and Z shall be the same as each other.

[0021] <Building> FIG. 1 shows a building 10 to which the heat insulation structure of an embodiment of the present disclosure is applied. The building 10 is formed by connecting building units 12. The building units 12 are constructed in a factory, transported to a construction site, and connected. Each building unit 12 is arranged such that its longitudinal direction is along the X direction.

[0022] The building unit 12 is a frame-like structure constructed by combining four columns 12A and eight beams 12B. The beams 12B are spanned above and below the columns 12A. The columns 12A are square steel pipes, and the beams 12B are channel steels. Also, secondary beams 12C are spanned on the beams 12B.

[0023] The number of connected building units 12 is not particularly limited. For example, three are connected in the X direction and four are connected in the Y direction. For example, one dwelling unit is formed by four building units 12 connected in the Y direction. That is, the building 10 is a row house (apartment building) formed by three rows of dwelling units formed by four building units 12 in the X direction. The building units 12 may be stacked in the vertical direction.

[0024] Each building unit 12 is constructed on the rising portions 22X and 22Y of the mat foundation 20. The rising portion 22X is a rising portion along the X direction and is arranged at both ends of the building 10 in the Y direction. On the other hand, the rising portion 22Y is a rising portion along the Y direction and is arranged for each span of the building unit 12.

[0025] As a result, multiple rectangular underfloor spaces V are formed in the building 10, enclosed by rising sections 22X and 22Y. Furthermore, each of these underfloor spaces V is formed for each dwelling unit. In other words, the rising section 22Y forms the partition wall between each dwelling unit. And beams 12B (beams oriented along the X direction) from the building unit 12 are positioned across adjacent rising sections 22Y.

[0026] An inspection hatch H is formed in one of the multiple building units 12 that are connected in the Y direction to form a single dwelling unit. The inspection hatch H is an opening for workers to move from the indoor space of the building 10 to the underfloor space V, and is fitted into the floor material 30, which will be described later.

[0027] When workers inspect the various pipes and equipment located in the underfloor space of building 10, they crawl under the beams 12C from the inspection hatch H, as shown by arrow M in Figure 1, and move under each building unit 12. Alternatively, workers crawl under the beams 12B to move between the building units 12.

[0028] As shown in Figure 2, the base platform 24 of the strip foundation 20 is embedded in the ground G. Furthermore, concrete 26 is poured onto the surface of the ground G below the underfloor space V. The beam 12B is positioned at a distance from the concrete 26. In this disclosure, the ground surface includes the surface of the concrete 26.

[0029] <Thermal insulation structure> As shown in Figure 2A, flooring material 30 is laid between the beams 12B, which serve as floor beams. The flooring material 30 is made up of boards such as structural plywood or particleboard. Insulation material 40 is laid below the flooring material 30 and above the beams 12B. The insulation material 40 is rigid polyurethane foam and is installed in the building unit 12 at the factory.

[0030] An insulating material 42 is laid below the insulating material 40. The insulating material 42 is spray polyurethane and is sprayed at the construction site to cover the underside of the insulating material 40, the beam 12B, and the secondary beam 12C (see Figure 1). Insulating materials 40 and 42 are examples of the first insulating material in this disclosure.

[0031] The area S shown by the dashed line in Figure 1 is the part that overlaps with beam 12B in a plan view. Furthermore, area S is the area in the longitudinal direction (X direction) of beam 12B where it is assumed that a worker crawling in the underfloor space V would pass through. Each area S is located at the same position in the X direction.

[0032] The width W of region S is determined based on the shoulder width of an adult male, for example, 45 cm or more, and preferably 50 cm or more. In this region S, as shown in Figure 2B, the insulation material 42 covers the upper flange and the upper end of the web of beam 12B.

[0033] On the other hand, the lower flange and lower end of the web of beam 12B are covered with insulation material 44. Insulation material 44 is a softer insulation material than insulation materials 40 and 42. For example, insulation material 44 is a fibrous insulation material such as glass wool or rock wool, and is packaged in bags. Insulation material 44 is an example of the second insulation material in this disclosure.

[0034] The insulation material 44 is placed across each beam 12B in adjacent building units 12. The insulation material 44 is wrapped around the lower flange of the beam 12B and laid from the lower surface to the upper surface of the lower flange. The insulation material 44 is also fixed to the lower flange of the beam 12B with butyl tape or the like.

[0035] When installing the insulation materials 42 and 44, the area where the insulation material 44 will be laid is protected in advance, and the insulation material 42 is sprayed on. Then the protective covering is removed, and after the insulation material 42 has foamed and hardened, the insulation material 44 is fixed to the beam 12B.

[0036] <Mechanism and Effects> In the thermal insulation structure of the above embodiment, as shown in Figure 2B, the lower surface of the beam 12B, which is a floor beam positioned at a distance from the concrete 26 poured onto the surface of the ground G, is covered with thermal insulation material 44. This thermal insulation material 44 is softer than the thermal insulation materials 40 and 42 that cover the lower surface of the floor material 30.

[0037] Therefore, compared to the case where the insulation material 44 has the same hardness as insulation material 40 or insulation material 42, the insulation material 44 is easier to compress and less likely to obstruct passage in the underfloor space V. In other words, when workers or others pass under the beam 12B, even if their bodies interfere with the insulation material 44, they can easily pass through by compressing the insulation material 44.

[0038] Furthermore, in this insulation structure, the insulation material 44 is placed across adjacent building units 12, making it easy to move between adjacent building units 12 in the underfloor space V.

[0039] Furthermore, in this insulated structure, the insulation material 44 is laid from the lower surface to the upper surface of the lower flange of the channel steel beam 12B, resulting in higher insulation performance compared to the case where only the lower surface is covered. In addition, since the insulation material 44 is a fibrous insulation material, it is easier to compress compared to foam insulation materials, and it easily returns to its original shape after being compressed.

[0040] Furthermore, in this insulation structure, the insulation material 44 is placed in a portion of the axial direction of the beam 12B (the portion indicated by area S in Figure 1). Compared to the case where the insulation material 44 is placed over the entire axial direction of the beam 12B, the area where the sprayed insulation material 42 is laid is wider, resulting in improved workability.

[0041] Furthermore, since the insulation material 44 is positioned at the same location in the axial direction of the beam 12B in multiple building units 12, it can move linearly through the underfloor space V of multiple building units 12, as indicated by arrow M.

[0042] <Other Embodiments> In the above embodiment, the building 10 is a structure formed by connecting building units 12, but the embodiments of this disclosure are not limited thereto. For example, the building 10 may be a structure constructed on-site without using building units 12. This structure may be made of steel or wood. In such a case, insulation material 44 is laid on some of the steel or wooden beams, and insulation material 42 is sprayed onto the other parts.

[0043] Furthermore, although the above embodiment uses thermal insulation material 40, this thermal insulation material 40 may be omitted. In other words, at least the present disclosure may be a configuration that includes thermal insulation materials 42 and 44.

[0044] Furthermore, in the above embodiment, the thermal insulation material 44 is placed in a part of the axial direction of the beam 12B (the part shown as region S in Figure 1), but the embodiments of this disclosure are not limited to this. For example, the thermal insulation material 44 may be placed over the entire axial direction of the beam 12B.

[0045] Furthermore, in the above embodiment, the thermal insulation material 44 is laid from the lower surface to the upper surface of the lower flange of the beam 12B, which is a channel steel beam, but the embodiments of this disclosure are not limited to this. For example, the thermal insulation material 44 only needs to cover the lower surface of the lower flange of the beam 12B.

[0046] Furthermore, although a strip foundation 20 is used for the building 10 in the above embodiment, the embodiments of this disclosure are not limited to this. The foundation of the building 10 may be an isolated foundation or a raft foundation. Also, when a strip foundation 20 is used, the concrete 26 may be omitted.

[0047] In these various embodiments, if the lower surface of the beam 12B is covered with an insulating material 44 that is softer than the insulating material 42, the insulating performance below the beam 12B can be ensured while minimizing obstruction to passage in the underfloor space V. Thus, this disclosure can be implemented in various forms. [Explanation of symbols]

[0048] 10 Buildings 12 building units 12B beam (floor beam) 20 Strip foundation (foundation) 22X rising section 22Y rising section 26 Concrete 40. Insulation material (First Insulation Material) 42. Insulation material (First insulation material) 44. Insulation material (secondary insulation material) G Ground

Claims

1. The rising part of the foundation, Multiple floor beams are stretched across the aforementioned rising section and positioned at a distance from the ground surface, The flooring material is stretched across the aforementioned floor beams, A first insulating material covering the underside of the flooring material, A second insulating material is provided that covers at least the lower end surface of the floor beam and is softer than the first insulating material. An insulated structure.

2. The aforementioned floor beam is the lower beam among the beams that span above and below the column and constitute a frame-shaped building unit. The second insulation material is positioned across each of the floor beams in the adjacent building units. The thermal insulation structure according to claim 1.

3. The floor beam is made of channel steel, The aforementioned first insulation material includes sprayed insulation material. The second insulating material is a fibrous insulating material laid from the lower surface to the upper surface of the lower flange of the channel steel. The thermal insulation structure according to claim 1 or 2.

4. The aforementioned building units are arranged in a row of three or more, The second insulation material is arranged in a part of the axial direction of the floor beam, and is arranged in the same position in the axial direction in each of the building units. The thermal insulation structure according to claim 2.

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