JP2002081145A - Exterior wall construction for externally insulated concrete building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an external wall construction for externally insulated wall construction capable of providing an energy saving effect for an externally insulated concrete building throughout a year even in a warm region where the outside air has a relatively high temperature in summer. SOLUTION: An insulating member 12 is arranged by tightly adhering to the exterior wall surface of a concrete building frame 11, backing members 15 arranged along the exterior side surface of the insulating members 12 is supported by mounting fittings 16 attached to the exterior wall surface of the concrete building frame 11, and exterior finish members are fixed to the backing members 15, and a thin radiation heat interrupting sheet 13 having many small holes 14 is adhered to the exterior side surface of the insulating members 12 as a feature in the exterior wall construction of the externally insulated concrete building fixed with the exterior finish members to the backing members.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer wall structure of an outer insulating concrete building, and more particularly to a method of arranging an insulating material on an outer wall surface of a concrete frame to form an outer insulating concrete building. The present invention relates to an outer wall structure of an externally insulated concrete building that blocks radiant heat of the building to suppress a rise in temperature of a concrete body.

[0002]

2. Description of the Related Art In recent years, the value of concrete buildings built using an external heat insulation method has been increasing. The external heat insulation method refers to a method of constructing a concrete structure constituting a building by surrounding the concrete structure with a heat insulating material from the outside so as to minimize the influence of the outside temperature.

[0003] The adoption of such an external heat insulation method significantly improves the living environment in a concrete building. In particular, the energy saving effect is high as compared with internal heat insulation in which a heat insulating material is arranged inside a concrete frame. It is possible to provide a living space which is excellent both economically and environmentally, for example, by significantly reducing the occurrence of dew condensation on the indoor side in winter.

[0004]

When a concrete building is constructed by using such an external heat insulation method, the outer wall surface of the concrete frame is covered with a heat insulating material such as rock wool and the outer surface of the heat insulating material is formed. A structure in which a plurality of base materials are erected at predetermined intervals along the base material and an exterior finishing material is attached using the base materials is generally used as an outer wall structure.

As described above, when a concrete building is constructed by using the outer heat insulation method, the outer wall surface of the concrete structure is covered with a heat insulating material such as rock wool in order to minimize the influence of the outside temperature on the concrete structure. Therefore, the temperature of the concrete skeleton as a heat storage does not drop extremely throughout the year.

[0006] However, in summer, the daytime outside air temperature is 3
In a warm region where the temperature is around 0 degrees and the outside air is 22 to 25 degrees even at night, the exterior finishing material is heated by the atmosphere, and from the back surface of the heated exterior finishing material through rock wool which is a heat insulating material. Radiant heat is transferred to the concrete frame.

[0007] Therefore, the temperature of the concrete skeleton rises considerably in summer, especially when the amount of heat received is large. As mentioned above, concrete has a heat storage effect, so once it is kept warm, even if the outside air drops slightly at night,
By itself, it does not lower to the desired temperature. For this reason, in the summer in a warm region as described above, the exterior insulation concrete building has a very high indoor temperature,
In summer, there is a problem that it is necessary to operate the air conditioner continuously for a long time.

[0008] This point will be described more specifically.
For example, in a concrete building with an internal insulation system, when the air conditioner is operated indoors when the room temperature is 29.5 degrees in summer, the room temperature drops by about 4.5 degrees one hour after the air conditioner starts operating, Even if the machine is stopped, since the heat insulating material is disposed inside the concrete frame, the room temperature is stably maintained at around 25 ° C.

[0009] However, in a concrete building of the external heat insulation system, when the air conditioner is operated indoors when the room temperature is 29.5 degrees in summer, the room temperature reaches about 5.0 degrees in two hours after the operation of the air conditioner starts. Although the temperature decreases, the room temperature rises immediately after the air conditioner is stopped due to a large heat supply amount due to the heat storage of the concrete skeleton, which is a so-called “chattering state”.

[0010] Therefore, the energy saving effect in winter due to the external insulating concrete building may be offset by the increase in the cooling load in summer, and therefore, the annual performance of the external insulating concrete building in a warm region where the outside air is relatively high in summer. There is a demand for an improvement that achieves an energy-saving effect through the process.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem, and it is possible to obtain a year-round energy saving effect of an externally insulated concrete building even in a warm region where outside air is relatively high in summer. It is an object of the present invention to provide an exterior wall structure of an exterior insulation concrete building.

[0012]

SUMMARY OF THE INVENTION The present invention is an outer wall structure of an externally insulated concrete building, and is configured as follows to solve the above-mentioned technical problem. That is,
The present invention relates to an outer wall structure of an outer insulating concrete building in which a heat insulating material is arranged on an outer wall surface of a concrete skeleton,
A heat insulating material which is arranged almost in close contact with the outer wall surface of the concrete skeleton, and a base material which is supported by using a mounting bracket attached to the outer wall surface of the concrete skeleton and is arranged along the outer surface of the heat insulating material; A thin radiant heat shielding sheet having air permeability is attached to the outer surface of the heat insulating material, which comprises an exterior finishing material fixed to a base material.

<Specific Configuration in the Present Invention> The outer wall structure of the external heat-insulating concrete building according to the present invention is composed of the essential components described above. Holds. The specific component is that the radiant heat shielding sheet is formed with a number of small holes, the holes are about 1 mm in diameter, and the distance between each other is about 5 to 10 mm.
mm.

Further, in the outer wall structure of the outer heat insulating concrete building according to the present invention, it is preferable that the radiant heat shielding sheet is formed of a thin heat shielding film such as aluminum foil or silver paper. Further, in the outer wall structure of the outer heat insulating concrete building of the present invention, it is preferable to use a radiant heat shielding sheet formed of a mesh material. This mesh material is
Fibers made of aluminum or the like are woven in a mesh form by plain weaving, twill weaving, or the like. In the exterior wall structure of the exterior insulation concrete building of the present invention, it is also preferable to attach a non-hole insulation sheet to the back surface of the exterior finishing material attached to the base material.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an outer insulating concrete building according to the present invention. FIG. 1 schematically shows an outer wall structure (hereinafter, referred to as an outer wall structure) 10 of an outer insulating concrete building according to an embodiment of the present invention, and FIG. 2 shows a part of the outer wall structure in an enlarged manner. Have been.

An outer wall structure 10 according to this embodiment is shown in FIG.
As shown in FIG. 1, a heat insulating material 12 is arranged on an outer wall surface of a concrete skeleton 11. In the outer wall structure 10 according to this embodiment, the heat insulating material 12 is configured as a two-layer structure in which an inner rock wool 12a and an outer rock wool 12b are overlapped with each other.
1 is arranged in close contact with the outer wall surface.

Generally, the thickness of the heat insulating material 12 is 200 mm in cold regions and 150 mm in other regions. In the latter case, the thickness of the inner rock wool 12 a is about 125 mm.
mm, and the thickness of the outer rock wool 12b is about 25 mm.

A radiation heat shielding sheet 13 is attached to the surface of the outer rock wool 12b constituting the heat insulating material 12. As the radiation heat shielding sheet 13, for example, a thin metal sheet or a metal film such as aluminum foil or silver paper can be used. The radiation heat shielding sheet 13 is provided with a large number of small holes 14 at predetermined intervals in order to provide ventilation performance.

The large number of small holes 14 are
2. It functions to release the water vapor generated inside to the atmosphere, and is formed with a size (diameter) and a mutual interval at which the water vapor inside the heat insulating material is effectively released without lowering the radiation heat blocking performance. Specifically, one hole 14 preferably has a diameter of about 1 mm, and each hole 14 has a diameter of about 5 to 10 m.
Preferably, they are formed at intervals of m in the vertical and horizontal directions.

On the surface side of the outer rock wool 12b on which the radiant heat shielding sheet 13 is adhered, a plurality of base materials (metal fittings) 15 are provided at predetermined intervals along the surface of the radiant heat shielding sheet 13. It is supported upright.
Usually, a metal square pipe is used for the base material 15 as shown in FIG.

A large number of base materials 15 made of this square pipe
Is supported by a number of mounting brackets 16 formed of a material having low thermal conductivity such as stainless steel and firmly mounted on the concrete skeleton 11. As a specific mounting structure of the base material 15 by each mounting bracket 16, one end of the cutting bolt 16 a is screwed into a grip anchor or a chemical anchor (not shown) which is driven into the concrete skeleton 11 from the outer wall surface side. Fixed together.

At this time, one end of the cutting bolt 16a is screwed to the anchor through an insertion hole formed at one end of the reinforcing stay 16b, and the nut 16c previously screwed to the cutting bolt 16a is tightened to tighten the reinforcing stay 16b. Is fixed to the surface of the concrete skeleton 11. The slicing bolt 16a extends substantially perpendicularly from the outer wall surface 12 of the concrete body 11, passes the other end through an insertion hole formed in the side surface of the base material 15, and nuts (not shown) from both sides of the base material side surface. To secure.

On the other hand, the other end of the reinforcing stay 16b extends obliquely with respect to the cutting bolt 16a, and is connected to the base material 15 by a screw or the like below the connecting portion between the base material 15 and the cutting bolt 16a. ing. In this manner, each base material 15 is firmly fixed and supported on the concrete skeleton 11 while maintaining a predetermined interval with high accuracy.

In FIG. 1, reference numeral 16d designates a lateral shake prevention breath, which is fixed to the concrete frame 11 as necessary similarly to the reinforcing stay, and connected to the adjacent horizontal base material 15. Base material 15 is attached to mounting bracket 1
The mounting structure described above, which is fixed to the concrete skeleton 11 by 6, is not the gist of the present invention, so that further detailed description will be omitted.

As described above, the exterior finishing material 17 is disposed on the outer wall surface of the concrete skeleton 11 on a large number of base materials 15 which are firmly attached to the concrete skeleton 11 and supported at predetermined intervals. The heat insulating material 12 is completely fixed using screws, bolts or the like so as to completely cover the heat insulating material 12, and a caulking material 18 is filled between the exterior finishing materials 17. As a result, a space is formed between the adjacent base materials 15, and the space functions as the ventilation layer 19.

Since the structure of the concrete frame 11 on the indoor side is not the gist of the present invention, a detailed description thereof will be omitted. However, in the case of an external heat insulating concrete building, a heat insulating material is provided inside the concrete frame 11. Basically, it is not provided, but a base wood is provided in a lattice shape so as to form a predetermined air layer (hollow layer) 20, and an interior material 21 such as a gypsum board is attached to the base wood. General.

According to the outer wall structure 10 of the outer insulating concrete building according to the present embodiment having such a configuration, for example, the outside air temperature rises in summer and the exterior finishing material 17 is heated, and the radiant heat is released from the back surface side by the heat insulating material. Even if the heat is transferred toward the heat insulating material 12, the propagation into the heat insulating material 12 is prevented by the radiant heat shielding sheet 13 attached to the surface of the heat insulating material 12, and as a result, the concrete body 11 is extremely There is no warming.

In the process of lowering the outside air temperature in winter and decreasing the humidity outside the concrete frame 11, the high water vapor partial pressure in the living room causes the water vapor to permeate through the concrete frame to the outside. After passing through the material, it exits through a number of small holes 14 provided in the radiant heat shielding sheet 13 to the ventilation layer 19 and is discharged outside through the ventilation layer 19, so that dew condensation occurs inside the heat insulating material 12. Nor.

Further, as an advantage of the outer wall structure 10 of the externally insulated concrete building according to the above-described embodiment, an improvement in the construction work environment can be mentioned. That is, in the external heat-insulating building, the heat-insulating material such as rock wool disposed on the outer surface of the concrete skeleton is not packaged at all because the water vapor permeable to the outside passes through the concrete skeleton. Therefore, when cutting insulation material that has been transported from the factory to the construction site to process it to the installation size,
In some cases, fiber waste is scattered in the air, and the working environment is degraded, for example, the worker inhales or touches the skin.

However, as described above, since the heat insulating material made of rock wool or the like is wrapped with an air-permeable aluminum foil or aluminum film, or wrapped with a mesh-like sheet or film described later, it passes through the concrete frame. It is possible to prevent fiber dust from scattering in the air at the time of cutting the heat insulating material while allowing the water vapor permeable to the outside to pass, so that the working environment for disposing the heat insulating material can be remarkably improved.

Further, according to the outer wall structure 10 of the outer insulating concrete building according to the present embodiment described above, in the construction method in which rock wool is held down by the vertical base material 15, the base material 1
There is a possibility that damage such as digging and tearing may occur due to the pressing pressure of the rock wool that comes into contact with the rock wool 5. However, by covering the surface of the rock wool with the above-mentioned radiant heat shielding sheet 13, the contact pressure of Concentration can be prevented, thereby preventing damage to the heat insulating material such as biting or tearing, and improving the durability of the heat insulating material in long-term use.

In the outer wall structure 10 of the outer insulating concrete building according to the above-described embodiment, a heat insulating material 12 is disposed on the outer wall surface of the concrete frame 11, and the surface of the heat insulating material 12 is made of, for example, aluminum foil or silver paper. Radiant heat shielding sheet 13 made of a thin metal sheet
Although the radiant heat from 7 is shielded, a similar heat insulating sheet (not shown) is attached to the entire back surface of the exterior finishing material 17 to further increase the heat insulating effect.

However, in this case, it is not necessary to provide a small hole for allowing water vapor to escape in the heat insulating sheet attached to the back surface of the exterior finishing material 17. That is, a heat insulating sheet without holes may be used. In addition, the above-described structure of the present invention is effective not only for the side outer wall of the concrete skeleton but also for a roof insulation structure, and the “outer wall structure” in the present invention means including such a heat insulating structure portion of the roof. It is.

Further, in the outer wall structure 10 of the outer insulating concrete building according to the above-described embodiment, an example is described in which a radiant heat shielding sheet having a large number of small holes is used. In the outer wall structure of (1), it is also preferable to use a radiant heat shielding sheet formed of a mesh material. This mesh-like material is obtained by weaving fibers formed of aluminum or the like into a mesh shape by plain weaving or twill weaving.

[0035]

As described above, according to the outer wall structure of the externally insulated concrete building of the present invention, even in summer when the outside air is relatively high, the concrete frame is radiated from the exterior finishing material heated by the outside air. Temperature can be prevented, and even in a warm region where the outside air is relatively high in summer, it is possible to obtain an energy-saving effect and a comfortable living environment of the externally insulated concrete building throughout the year.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory view schematically showing a configuration of an outer wall structure of an externally insulated concrete building according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing the outer wall structure of the outer heat-insulating concrete building shown in FIG. 1, cut along line 2-2.

[Explanation of symbols]

 Reference Signs List 10 outer wall structure of outer heat-insulating concrete skeleton 11 concrete skeleton 12 heat insulator 12a inner rock wool constituting heat insulator 12b outer rock wool constituting heat insulator 13 radiant heat shielding sheet 14 small hole 15 base material 16 mounting bracket 17 exterior finish Lumber

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04B 2/56 622 E04B 2/56 622J 645 645A F-term (Reference) 2E001 DB02 DD01 EA01 FA04 GA12 GA22 GA23 GA24 GA42 GA44 GA66 HA32 HB01 HB03 HB04 KA01 LA04 NA07 NB01 NC01 ND12 2E002 EA08 FA02 FA09 FB01 FB02 HA01 HA03 HB01 HB02 MA27 MA32

Claims (5)

[Claims] An outer wall structure of an external heat insulating concrete building in which a heat insulating material is disposed on an outer wall surface of a concrete skeleton, wherein the heat insulating material disposed substantially in close contact with the outer wall surface of the concrete skeleton, The base material is supported using a mounting bracket attached to an outer wall surface, and includes a base material arranged along the outer surface of the heat insulating material, and an exterior finish material fixed to the base material. An outer wall structure of an outer insulating concrete building, characterized in that a thin radiant heat shielding sheet having air permeability is attached to a side surface. 2. The external insulation according to claim 1, wherein the radiant heat shielding sheet has a plurality of small holes formed therein, wherein the holes have a diameter of about 1 mm and a distance between the holes is about 5 to 10 mm. Exterior wall structure of concrete building. 3. The external wall structure of an external heat insulating concrete building according to claim 1, wherein the radiant heat shielding sheet is formed of a thin heat shielding film of aluminum foil or silver paper. 4. The outer wall structure of an externally insulated concrete building according to claim 1, wherein the radiant heat shielding sheet is formed of a mesh material. 5. The external heat-insulating concrete building according to claim 1, wherein a non-hole heat-insulating sheet is attached to a back surface of the exterior finishing material attached to the base material. Exterior wall structure.