Heat insulation structure

Abstract

To improve heat insulation property while reducing impact to a ceiling height at a four storied building with a height equal to or less than 10 m.SOLUTION: A heat insulation structure 1 is applied to a four storied building 100 with a height equal to or less than 10 m, and at a slab 110 at a predetermined range from an inner surface 120a of an outer wall 120 dividing the outside and the inside, and at a chipped part 10 formed with a level of a top end lower than the other range, a heat insulation material 20 is arranged. Thus arranging the heat insulation material 20 at the predetermined range from the inner surface 120a of the outer wall 120 dividing the outside and the inside can prevent a heat bridge phenomenon and improve heat insulation property. In addition, by arranging the heat insulation material 20 at the chipped part 10 formed with the level of the top end lower than out of the predetermined range can prevent a ceiling height from being lowered due to a thickness of the heat insulation material 20.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a heat insulation structure applicable to a four-story building with a height within 10 m.

Background Art

[0002] Depending on the area where a building is constructed, if its height exceeds 10 m, it will be subject to various regulations (for example, Article 56-2 of the Building Standards Law, which defines the exemption from the application of shadow regulations), and it will also cause inconvenience to the neighbors. Generally, when building a multi-story building with a height of 10 m or less, in order to ensure a floor height that does not impair the habitability and keep the height within 10 m, it was designed as a three-story building.

[0003] However, if the floor area is the same, by making it a four-story building, it is possible to make the living space wider compared to a three-story building. Therefore, the applicant has proposed a four-story building with a height within 10 m (see Patent Document 1).

[0004] In recent years, there has been a demand for improving the heat insulation performance of buildings. Specifically, in a building, when a heat insulating material is arranged on the inner surface side of an outer wall that separates the outside and the inside, a heat bridge phenomenon occurs where heat escapes from the part where the slabs of the outer wall are continuous because the heat insulating material cannot be arranged there. Therefore, in order to prevent the heat bridge phenomenon, it is required to arrange a heat insulating material within a predetermined range from the outer wall in the slab.

[0005] For example, Patent Document 2 proposes a heat insulation reinforcement structure for a building structure in which a heat insulating board is arranged on the upper surface of a floor slab and a self-leveling material is poured up to a position higher than the heat insulating board to fix the heat insulating board to the floor slab.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] However, in the heat insulation and reinforcement structure of Patent Document 2, since the heat insulation board is laid on the slab and the self-leveling material is poured from above it, the finish thickness of the floor increases. For this reason, there is a problem that the ceiling height, which is the height from the floor finish surface to the ceiling, becomes smaller by the amount thickened by the heat insulation board and the self-leveling material.

[0008] In a four-story building with a height of 10 m or less, in order to secure a ceiling height that does not impair the habitability, there is a desire to suppress the thickness of the floor finishing material, and the heat insulation and reinforcement structure of Patent Document 2 cannot be adopted.

[0009] The present invention has been made in view of the above points, and an object thereof is to improve the heat insulation performance while suppressing the influence on the ceiling height in a four-story building with a height of 10 m or less.

MEANS FOR SOLVING THE PROBLEMS

[0010] (1) A heat insulation structure applied to a four-story building with a height of 10 m or less, wherein a heat insulating material is disposed in a notch formed in a slab in a predetermined range from the inner surface of a wall partitioning the exterior and the interior so that the level of the top end is lower than that of other ranges. 、 The notch in which the heat insulating material is disposed is formed by a stepped slab having a lower top level than the other range in the slab within the predetermined range A heat insulation structure characterized by the above.

[0011] In the invention of (1), the heat insulation structure applied to a four-story building with a height of 10 m or less is such that a heat insulating material is disposed in a notch formed in a slab in a predetermined range from the inner surface of a wall partitioning the exterior and the interior so that the level of the top end is lower than that of other ranges.

[0012] By arranging the heat insulating material within a predetermined range from the inner surface of the wall that separates the exterior and the interior in this manner, it becomes possible to prevent the thermal bridge phenomenon and improve the heat insulation performance. And by arranging the heat insulating material in the notch formed such that the level of the top end is lower than that outside the predetermined range, it is possible to prevent the ceiling height from decreasing due to the thickness of the heat insulating material. Therefore, in a four-story building with a height of 10 m or less, it is possible to improve the heat insulation performance while suppressing the influence on the ceiling height.

[0014] Here, it is not possible to reduce the thickness of a predetermined slab defined as a structural body (it is not possible to form a notch). According to the invention of (2), a notch can be formed in the protruding portion added on a predetermined slab defined as a structural body, and the heat insulating material can be arranged in the notch of this protruding portion. Thereby, it is possible to arrange the heat insulating material without affecting the structural body and while suppressing the influence on the ceiling height.

[0016] According to the invention of (3), a notch can be formed in a slab within a predetermined range by a stepped slab whose top end level is lower than that of other ranges, and the heat insulating material can be arranged in the notch of this protruding portion. Thereby, since the stepped slab can be used as a notch for arranging the heat insulating material, the process of separately forming a notch only for arranging the heat insulating material can be reduced. Therefore, it is possible to more simply arrange the heat insulating material while suppressing the influence on the ceiling height.

Effect of the Invention

[0017] According to the present invention, in a four-story building with a height of 10 m or less, it is possible to improve the heat insulation performance while suppressing the influence on the ceiling height.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

MODE FOR CARRYING OUT THE INVENTION

[0019] Hereinafter, with reference to the accompanying drawings, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail. In the following figures, the same elements are denoted by the same numbers or symbols throughout the description of the embodiments.

[0020] (A four-story building with a height of 10 m or less) FIG. 1 is a view showing an outline of a building to which a heat insulation structure according to an embodiment of the present invention is applied. In FIG. 1, the left side shows a cross section of a living room where the occupant spends more time, and the right side shows a cross section of an entrance hall which is a space temporarily used by the occupant.

[0021] A four-story building 100 with a height of 10 m or less is made of reinforced concrete, and the floor height (the height from the FL of one floor to the FL of the next upper floor) is 2500 mm (10 m / 4) or less. Further, the thickness of a predetermined slab 110 defined as a structure of the building 100 on this scale needs to be 150 mm or more.

[0022] In addition, since the occupant spends more time in the living room of the building 100, the ceiling height of the living room (the height from the floor finish upper surface to the ceiling finish upper surface) is higher (for example, 2300 mm or more) because the sense of oppression in the living room becomes greater as it becomes lower, and there is a desire to improve the habitability. On the other hand, since spaces other than the living room such as the entrance hall, corridor, and plumbing area are spaces temporarily used by the occupant, the habitability does not decrease even if the ceiling height as high as that of the living room is not secured.

[0023] In such a building 100, in order to prevent heat bridge phenomenon and improve heat insulation performance, it is necessary to perform heat insulation treatment on the upper and lower surfaces of the slab 110 within a predetermined range (for example, a range of 450 mm or more from the inner surface 120a) of the outer wall 120, which is an example of a wall partitioning the exterior and the interior.

[0024] Also, when performing heat insulation treatment on the slab 110 within a predetermined range from the inner surface 120a of the outer wall 120, since at least the upper surface side of the slab 110 in the living room serves as the floor, it is necessary to make it flat so that there is no step after arranging the heat insulating material.

[0025] (Heat insulation structure) In the heat insulation structure 1, the heat insulating material 20 is arranged in the cutouts 10, 10A formed so that the level of the top edge is lower than that of other ranges in the slab 110 within a predetermined range from the inner surface 120a of the outer wall 120, which is a wall partitioning the exterior and the interior.

[0026] The heat insulating material 20 is, for example, heat insulating mortar, but is not limited thereto, and any material can be used as long as it has higher heat insulation performance than concrete and can be used as a base for floor finishing materials (for example, wood-based floor materials, tiles, etc.).

[0027] (Heat insulation structure of living room) FIG. 2 is a diagram showing a cross section of a living room of a building to which the heat insulation structure according to an embodiment of the present invention is applied. The slab 110 in the living room has a thickened portion 112 (for example, 20 mm thick) added on the structural slab 111 (for example, 150 mm thick).

[0028] In the slab 110 in the living room, a cutout 10 is formed by not providing the thickened portion 112 within a predetermined range from the inner surface 120a of the outer wall 120. And the heat insulating material 20 is arranged in this cutout 10. For example, by setting the thickness of the heat insulating material 20 to 15 mm and arranging the unevenness adjusting material thereon with a thickness of 5 mm, the portion other than the portion where the cutout 10 of the slab 110 is formed becomes flush, serving as a base for the floor finishing material 130.

[0029] As a result, without creating a step on the floor in the living room, the upper surface side of the slab 110 within a predetermined range from the inner surface 120a of the outer wall 120 can be heat-treated.

[0030] Such a notch 10 is formed as follows. When placing concrete to raise a certain floor, a plate material having the same thickness as the depth of the notch 10 (for example, 20 mm or the like) is placed in the concrete before hardening, and the upper surface of this plate material is aligned with the top edge of the concrete before hardening (FL shown in FIG. 2: the height serving as the reference surface for the floor), and the concrete is hardened. Then, when the formwork is disassembled, the notch 10 is formed by removing the plate material.

[0031] Here, when the floor height is limited to 2500 mm (10 m / 4) or less, if a laid floor (double floor) is adopted for the floor finish, the required dimensions of the floor finish increase and the ceiling height is compressed. For this reason, it is desirable that the floor finish in this embodiment is a direct-laying of the floor finishing material 130 (for example, a wood-based floor material or the like).

[0032] According to the heat insulation structure 1 of this embodiment, with the above-described configuration, in a four-story building 100 with a height within 10 m, in a situation where the floor height can only be 2500 mm, the thickness of the structural slab 111 is 150 mm, the thickness of the recessed portion 112 (heat insulation material 20) is 20 mm, the thickness of the floor finishing material 130 (for example, a wood-based floor material or the like) is 15 mm, and the ceiling finishing material 140 (for example, vinyl cloth or the like) is directly laid on the lower surface of the upper floor slab 110. Thus, at least outside a predetermined range from the inner surface 120a of the outer wall 120, the ceiling height can be set to 2315 mm. As a result, it is possible to prevent the heat bridge phenomenon, improve the heat insulation performance, and without forming a step due to the arrangement of the heat insulation material 20 on the floor, reduce the sense of oppression caused by the low ceiling, and prevent the living comfort in the living room from deteriorating.

[0033] (Heat insulation structure for spaces other than the living room) FIG. 3 is a view showing a cross section of a space other than the living room of a building to which the heat insulation structure according to the embodiment of the present invention is applied.

[0034] In the slab 110 in the space outside the living room, a notch 10A is formed by a stepped slab whose top level is lower than that of other ranges within a predetermined range from the inner surface 120a of the outer wall 120. And a heat insulating material 20 is disposed in this notch 10A. The heat insulating material 20 disposed in the notch 10A serves as a base for the floor finishing material 130A disposed thereon.

[0035] Here, generally, in a house, the floor of the entrance is finished one step lower than the floor of the living room or the corridor connected to the living room, or is finished with a finishing material (for example, a wood-based floor material, etc.) having a larger height dimension than the finishing material of the floor of the living room or the corridor connected to the living room (for example, a porcelain tile, etc.). When the floor of the living room or the corridor connected to the living room is used as a laid floor, even if the top of the slab is at the same height in the living room part and the entrance part, by not using the entrance as a laid floor, a step can be formed at the boundary between the floor of the living room or the corridor connected to the living room and the floor of the entrance, so that the entrance can be finished one step lower or with a finishing material having a larger height dimension at the entrance.

[0036] However, in the specification of finishing the floor of the living room or the corridor connected to the living room with a stretch ceiling as in this embodiment, when it is desired to finish the entrance one step lower, a stepped slab is formed in the slab 110 to finish the slab 110 of the entrance one step lower. Also, when it is desired to dispose a floor finishing material 130A (for example, a porcelain tile that requires a height dimension of 45 mm) having a height dimension larger than that of the floor finishing material 130 of the living room (for example, a wood-based floor material that requires a height dimension of 15 mm) at the entrance, if the top of the slab is formed at the same height in the living room part and the entrance part, the finished surface of the floor finishing material 130A at the entrance will protrude from the finished surface of the floor of the living room or the corridor connected to the living room. Therefore, a stepped slab is formed in the slab 110 to finish the slab 110 of the entrance one step lower. That is, in the specification of finishing the floor of the living room or the corridor connected to the living room with a stretch ceiling, regardless of the presence or absence of the heat insulating material 20, it is necessary to form a stepped slab that provides a step at the boundary between the living room or the corridor connected to the living room and the entrance in the slab 110.

[0037] The notch 10A is formed by such a stepped slab of the slab 110, and the heat insulating material 20 is disposed therein. Thus, the stepped slab formed regardless of the presence or absence of the heat insulating material 20 can be used as the notch 10A for disposing the heat insulating material 20, so that the process of separately forming the notch 10A only for disposing the heat insulating material 20 can be reduced. Therefore, it is possible to more simply dispose the heat insulating material while suppressing the influence on the ceiling height.

[0038] Further, the height dimension of the step of the stepped slab of the slab 110 is, for example, 45 mm when the floor finishing material 130A of the entrance is made of vitreous tile, and becomes 60 mm when the thickness of the heat insulating material 20 of 15 mm is added thereto.

[0039] As described above, the slab 110 in the living room has the thickening portion 112 (thickness 20 mm) added on the structural slab 111 (thickness 150 mm). On the other hand, in the slab 110 of the entrance, by omitting the thickening portion 112 (thickness 20 mm), the height dimension of the step of the structural slab 111 (the height dimension protruding to the lower floor side from the lower surface of the slab 110) can be suppressed to 40 mm (60 mm - 20 mm). Thereby, when forming the stepped slab, it is possible to prevent the space in the ceiling space of the lower floor from being compressed while performing the heat insulation treatment.

[0040] On the lower surface side of the slab 110, it is desirable to dispose the heat insulating material 21 (for example, synthetic resin foam material or the like) in a predetermined range (for example, a range of 450 mm or more from the inner surface 120a) from the inner surface 120a of the outer wall 120. Such a heat insulating material 21 is disposed, for example, by spraying the synthetic resin foam material onto the inner surface 120a side of the outer wall 120 up to the above-mentioned predetermined range on the lower surface side of the slab 110. The heat insulating material 21 is preferably covered with a ceiling finishing material obtained by attaching a cloth to a gypsum board.

[0041] Although the present invention has been described using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiments. It is obvious to those skilled in the art that various changes or improvements can be made to the above embodiments. Also, it is clear from the description of the claims that forms with such changes or improvements can also be included in the technical scope of the present invention.

Explanation of Reference Numerals

[0042] 1 Heat insulation structure 10, 10A Notch 20, 21 Heat insulating material 100 Building 110 Slab 111 Structural slab 112 Deep part 120 Outer wall 130, 130A Floor finish material 140 Ceiling finish material

Claims

【Claim 1】 A heat insulation structure applied to a four-story building with a height within 10 m, a heat insulating material is disposed in a notch formed in a slab within a predetermined range from the inner surface of a wall partitioning the exterior and the interior such that the level of the top edge is lower than that in other ranges, the heat insulation structure, wherein the notch in which the heat insulating material is disposed is formed in the slab within the predetermined range by a stepped slab whose top edge level is lower than that in other ranges.

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