JP4928405B2 - Wall insulation structure and construction method - Google Patents

Description

  The present invention relates to a heat insulating structure of an inner wall continuous with an outer wall in a concrete building and a construction method thereof.

  Conventionally, there are buildings such as a reinforced concrete structure (RC structure) and a steel-framed reinforced concrete structure (SRC structure) as concrete structures. In these concrete buildings, in order to prevent dew condensation from occurring on the inner wall according to the specifications and the environment, indoor insulation is achieved by an outer heat insulation method or an inner heat insulation method.

  The outside heat insulation method requires heat insulation on the outside of the outer wall and tiles on the surface. Therefore, it takes a lot of time and labor to work, and it is often used in cold regions. In a concrete building (such as a condominium or a low-rise building), an internal heat insulating method in which a heat insulating material is attached to the inside is often employed.

  In this inner heat insulation method, heat insulating material is attached to the inner side of the outer wall, but there are inner walls that are continuous with the outer wall (for example, partition walls and sleeve walls that partition the room, etc.), ceiling slabs that partition the upper and lower intermediate floors, etc. These become thermal bridges (mainly cooling bridges) and cause problems such as condensation.

  Therefore, as shown in a horizontal sectional view (plan view) showing the conventional wall heat insulating structure shown in FIG. 4, by providing folded heat insulating materials 53 on both sides of the inner wall 52 continuous with the outer wall 51, the thermal bridge 54 of the inner wall 52 is provided. Insulation of the part which becomes becomes prevention of dew condensation. Such a heat insulation structure is similarly applied to the slab. The heat insulating material 53 is provided in a range L of about 500 mm from the inner side surface of the outer wall 51 continuously to the heat insulating material 53 provided inside the outer wall 51. As the heat insulating material 53, blowing polystyrene foam or the like is employed.

As a conventional technique of this type, the outer wall is covered with the heat insulating material for the outer wall, and the inner wall heat insulating material is attached to both side surfaces within a predetermined range from the inner surface of the inner wall. There is a structure in which a reinforcing member is attached to the face of the mouth located on the indoor side (see, for example, Patent Document 1).
JP 2003-96942 A

  However, in the heat insulating structure of the inner wall 52 as shown in FIG. 4, a portion where the heat insulating material 53 protrudes on the wall surface 55 of the inner wall 52 is generated, and a step 56 is generated at the inner end thereof. Therefore, when finishing the inner wall 52, finishing such as ground treatment on the front side of the heat insulating material 53, attachment of a board 57 (gypsum board or the like), pasting of the cloth 58 on the board 57, etc., according to the protruding heat insulating material 53. Work must be performed, and the finishing work of the inner wall 52 requires a great deal of time and labor. The board 57 shown in the figure is attached by a GL method (zipsum lining method) in which the board 57 is pressure-bonded with a certain distance (space 60) from the outer wall 2 side using a GL bond 59. In particular, at the level difference 56 portion, skill is required for processing the board 57 and pasting the cloth 58 along the level difference 56, which is very time consuming.

  Therefore, an object of the present invention is to provide a wall heat insulating structure that can prevent an inner wall that is continuous with an outer wall from becoming a thermal bridge, and that can simplify a finishing operation of the inner wall, and a construction method therefor.

In order to achieve the above object, a wall heat insulating structure of the present invention is a wall heat insulating structure for insulating a concrete inner wall continuous with a concrete outer wall in a concrete building, and between the outer wall and the inner wall, to form a surface continuous with the wall surface of the inner wall, let includes a heat-insulating portion so as never concrete continuously with a predetermined interval between the inner wall and the outer wall, the heat insulating part, outside the It arrange | positions in the position used as the inner surface of an outer wall, and the heat insulating material of predetermined thickness is provided in the said heat insulation part toward the said inner wall side . (In this specification and claims, “outer wall” refers to a wall whose outer surface faces the outside, and “inner wall” refers to a wall at the boundary between indoor rooms, an indoor partition wall, and sleeves. This means that the heat conduction from the outer wall to the inner wall can be blocked by the heat insulation part, eliminating the work of installing the heat insulating material on the inner wall to prevent condensation on the inner wall. The workability can be improved. Moreover, it is possible to improve the aesthetics of the inner wall.

Further, it is possible the thickness of the outer wall forms an insulating portion on the connecting portion of the inner wall so as not to vary the position of the inner wall.

  Further, in the wall heat insulating structure, the heat insulating portion may be constituted by a heat insulating member having a fixing material on both wall surfaces of the inner wall and having a heat insulating material between the fixing materials. As this heat insulating member, for example, a structural slit material can be used. Thereby, the heat insulation member which comprises a heat insulation part can be easily fixed to a concrete formwork with a fixing material, and a heat insulation part can be easily integrally formed at the time of concrete placement.

  On the other hand, the wall insulation structure construction method of the present invention is any one of the above-described wall insulation structure construction methods, fixing the outer wall mold forming the outer wall and the inner wall mold forming the inner wall, The heat insulating part is fixed in the inner wall mold, and concrete is placed in a space formed by the outer wall mold and the inner wall mold to integrally form the heat insulating part between the concrete outer wall and the inner wall. I am doing so. In this way, by placing the concrete in the concrete formwork, there is a surface continuous with the inner wall between the concrete outer wall and the inner wall, and a predetermined interval is provided between the inner wall and the outer wall. An empty heat insulating part can be easily provided.

  Furthermore, in the construction method of the wall heat insulating structure, the heat insulating portion is constituted by a heat insulating member having a fixing material on both wall surfaces of the inner wall and having a heat insulating material between the fixing materials, and the fixing material is formed on the inner wall. It may be fixed by fixing means that can be removed from the outside of the mold, and concrete may be placed in a space formed by the inner wall mold and the outer wall mold. In this way, the heat insulating member forming the heat insulating portion can be easily fixed to the concrete mold, so that the workability is improved and the labor is reduced by providing the heat insulating portion between the concrete outer wall and the inner wall. be able to.

  In addition, a heat insulating material that thermally insulates the outer wall is provided inside the outer wall formed by the method of constructing the wall heat insulating structure, and a board that is attached to the inner side of the heat insulating material by a gypsum lining method is disposed at a predetermined interval on the inner side of the outer wall. If it adheres and attaches to the bond provided in the perpendicular direction between the bond provided in (1) and the heat insulating part on the inner wall side of the board, the sound insulation performance in the heat insulating part can be improved.

  According to the present invention, since the heat conduction from the outer wall to the inner wall can be blocked by the heat insulating portion by the means described above, it is possible to simplify the finishing work by eliminating the heat insulating material construction on the inner wall. .

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a horizontal sectional view (plan view) of a wall heat insulating structure showing an embodiment of the present invention, and FIG. 2 is a II-II cross sectional view of the wall heat insulating structure shown in FIG. 3 is a cross-sectional view showing in detail the heat insulating portion shown in FIG. 1, (a) is an enlarged cross-sectional view of the heat insulating portion shown in FIG. 1, and (b) is an enlarged cross-sectional view of the heat insulating portion showing another example. is there. In the specification and claims, the outdoor side of the outer wall is referred to as the outside, and the indoor side is referred to as the inside.

  As shown in FIG. 1, the horizontal cross section of the wall heat insulating structure 1 includes an outer wall 2, an inner wall 3 continuous with the outer wall 2, and a heat insulating portion 5 provided between the outer wall 2 and the inner wall 3. It has a structure. The outer wall 2 has a predetermined thickness and forms a continuous wall. The inner wall 3 has a predetermined thickness and is provided inward so as to be orthogonal to the outer wall 2. The heat insulating portion 5 is provided at a connection portion between the inner wall 3 and the outer wall 2. The heat insulating portion 5 forms a surface that is continuous with the wall surface 4 of the inner wall 3, and the outer side is arranged at a position that is flush with the inner side surface of the outer wall 2, and is formed with a predetermined thickness toward the inner wall 3 side. Yes. The heat insulating portion 5 provides a predetermined space between the outer wall 2 and the inner wall 3.

  As shown in FIG. 2, the upper and lower ends of the inner wall 3 are connected to the slab 6, but a heat insulating portion 5 is continuously provided in the vertical direction between the inner wall 3 and the outer wall 2. With the heat insulating portion 5 provided in this manner, the inner wall 3 is prevented from being continuous with the outer wall 2 in the vertical direction by the concrete. In addition, since the slab 6 is connected with the outer wall 2, the heat insulating material 7 is provided in the range L of about 500 mm from the inner surface of the outer wall 2 so that this slab 6 may not become a thermal bridge. This heat insulating material 7 is spraying of the above-mentioned expanded polystyrene. A beam 11 is provided on the lower surface of the slab 6.

  As shown in FIG. 3, the heat insulating portion 5 may be formed of a heat insulating material 8 having a rectangular cross section as shown in (a). However, as shown in (b), the wall surface 4 of the inner wall 3 is formed. The fixing material 9 attached to the mold material 10 may be provided on the side, and the heat insulating material 8 may be provided between them. When the fixing material 9 is provided on the wall surface 4 side of the inner wall 3 in this way, the heat insulating portion 5 can be easily fixed to the inner wall mold 12 for placing concrete (shown by a two-dot chain line in the figure). Therefore, the heat insulation part 5 can be easily provided at a desired place. As the fixing means for fixing the fixing material 9 to the inner wall formwork 12, detachable means such as nails 14 and wood screws are preferable. By using the detachable fixing means, the fixing means can be removed after placing the concrete. The inner wall mold 12 can be easily removed with the heat insulating portion 5 provided between the outer wall 2 and the inner wall 3. Further, in the embodiment shown in FIG. 3 (b), the heat insulating material 8 can be stably held by the mold material 10 when the concrete is placed. The outer wall mold 13 is fixed in contact with the inner wall mold 12.

  As the heat insulating material 8, for example, foamed polystyrene, foamed polyethylene, rubber foam or the like is used. The heat insulating material 8 may be determined in consideration of heat insulating performance, wall area, and the like. In FIG. 3, two types of heat insulating portions 5 are shown. However, the heat insulating portions 5 may have other configurations as long as the heat conduction from the outer wall 2 to the inner wall 3 can be blocked.

  And as shown in FIG. 1, the outer wall 2 formed in the state in which the heat insulation part 5 was provided is provided with a heat insulating material 15 (the above-mentioned foamed polystyrene spray or the like) on the inner side, and a board 16 on the inner side. Is attached, and a cloth 17 is attached to the board 16. On the other hand, since the inner wall 3 has no protrusions on the wall surface 4, the cloth 17 can be directly attached. Therefore, the finishing of the inner wall 3 can be easily performed, and the surface of the inner wall 3 can be finished without a step.

  As the board 16, a flame retardant board such as a plaster board is used. For example, a GL bond 18 is applied to the outer wall 2 side at a predetermined interval in a dumpling shape, and a certain amount of space (space 19) is provided from the outer wall 2 side. It is attached by a GL method for crimping 16. In particular, when the inner wall 3 to which the board 16 is mounted by this GL method is a partition wall with another room, the GL bond 18 is continuously provided in the vertical direction between the inner wall side of the board 16 and the heat insulating portion 5; By attaching the board 16 with these GL bonds 18, it is possible to improve the sound insulation performance in the heat insulating portion 5. As the interior finishing cloth 17 (wallpaper), a vinyl cloth, a paper cloth, a cloth cloth, or the like is used.

  As described above, according to the wall heat insulating structure 1, the heat insulating portion 5 provides a predetermined gap between the outer wall 2 and the inner wall 3 to block heat conduction, so that the outer portion of the inner wall 3 is a heat bridge. Since this makes it possible to make the wall surface 4 of the inner wall 3 flat, the work required for finishing the inner wall 3 by directly pasting the cloth 17 on the inner wall 3 is greatly simplified and efficient. Can be done. And since the wall surface 4 of the inner wall 3 becomes planar shape, it can be set as a preferable form also in terms of aesthetics.

  The concrete outer wall 2 and inner wall 3 may have any form such as a reinforced concrete structure (RC structure), a steel reinforced concrete structure (SRC structure), a reinforced concrete structure including glass fiber (GRC structure), or the like.

  In the above embodiment, the outer wall 2 and the inner wall 3 provided in the vertical direction have been described as an example. However, the outer wall 2 and the inner wall 3 that are continuous with the outer wall 2 can be similarly applied. The form with the inner wall 3 is not limited to the said embodiment.

  Furthermore, the above-described embodiment shows an example, and various modifications can be made without departing from the gist of the present invention, and the present invention is not limited to the above-described embodiment.

  The wall heat insulating structure according to the present invention can be used in a concrete building that does not want to cause a step in the wall surface of the inner wall that is continuous with the outer wall.

It is a horizontal sectional view of the wall heat insulation structure which shows one embodiment of the present invention. It is II-II sectional drawing of the wall heat insulation structure shown in FIG. It is sectional drawing which shows the heat insulation part shown in detail in FIG. 1, (a) is an expanded sectional view of the heat insulation part shown in FIG. 1, (b) is an expanded sectional view of the heat insulation part which shows another example. It is a horizontal sectional view which shows the conventional wall heat insulation structure.

Explanation of symbols

1 ... Wall insulation structure
2 ... Outer wall
3 ... Inner wall
4 ... Wall
5 ... Heat insulation part
6 ... Slab
7… Insulation
8… Insulation
DESCRIPTION OF SYMBOLS 9 ... Fixed material 10 ... Mold material 11 ... Beam 12 ... Inner wall formwork 13 ... Outer wall formwork 14 ... Nail 15 ... Thermal insulation material 16 ... Board 17 ... Cross 18 ... GL bond

Claims (5)

A wall insulation structure that insulates a concrete outer wall and a continuous concrete inner wall in a concrete building,
A surface is formed between the outer wall and the inner wall, and a surface that is continuous with the wall surface of the inner wall is provided , and a heat insulating portion is provided to prevent the concrete from continuing with a predetermined gap between the inner wall and the outer wall. ,
The heat insulating portion is disposed at a position where the outer side becomes the inner side surface of the outer wall,
A wall heat insulating structure in which a heat insulating material having a predetermined thickness is provided on the heat insulating portion toward the inner wall. The wall insulation structure according to claim 1 ,
The wall heat insulation structure which comprised the said heat insulation part with the heat insulating member which had the fixing material in the both wall surface side of the said inner wall, and comprised the heat insulating material between this fixing material. It is the construction method of the wall heat insulation structure of Claim 1 or Claim 2 ,
An outer wall mold that forms the outer wall and an inner wall mold that forms the inner wall are fixed, the heat insulating portion is fixed in the inner wall mold, and the space formed by the outer wall mold and the inner wall mold A method for constructing a wall insulation structure, characterized in that concrete is placed on a wall and a heat insulation portion is integrally formed between the concrete outer wall and the inner wall. In the construction method of the wall heat insulation structure of Claim 3 ,
The heat insulating portion is constituted by a heat insulating member having a fixing material on both wall surfaces of the inner wall and having a heat insulating material between the fixing materials,
A method for constructing a wall insulation structure, in which the fixing material is fixed by a fixing means that can be removed from the outside of the inner wall mold, and concrete is placed in a space formed by the inner wall mold and the outer wall mold. Inside the outer wall formed by the construction method of the wall heat insulating structure according to claim 3 or claim 4 , a heat insulating material for heat insulating the outer wall is provided,
A board to be attached to the inside of the heat insulating material by a gypsum lining method was continuously provided in the vertical direction between the bond provided at a predetermined interval on the inside of the outer wall and the heat insulating portion on the inner wall side of the board. A method of constructing a wall insulation structure that is attached to a bond.

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