JPH10140687A - Heat insulating wall structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent inner dewing and rust due to heat bridge of screws and the like fastened with a framework from generating, in the heat insulating wall of a building of steel framework. SOLUTION: In this heat insulating wall, heat insulating material 2 arranged outside a metallic frame 1 is fastened with the metallic frame 1 by means of screws 3 for heat insulating material, ventilating furring strips 4 arranged outside the heat insulating material 2 is fastened with the metallic frame 1 by means of screws 5 for furring strips, and an outer facing material 6 is fitted to the outside. Then, the head part of the screw 5 for ventilating furring strips is sunk on the recessed part of the ventilating furring strips 4, the interior of the recessed part is filled with urethane 12 by a simplified urethane spray, and hence the head part of the ventilating furring strips screw 5 is prevented from contacting with cold air. In addition, the head part of the screws 3 for heat insulating material is covered with the ventilating furring strips 4, and hence the head part of the screw 3 for heat insulating material is prevented from contacting with cold air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for preventing internal dew condensation and rusting caused by a heat bridge such as a screw fastened to a frame, for example, in a heat insulating wall of a steel frame building.

[0002]

2. Description of the Related Art In recent years, in the field of construction, for example, in the construction field, recycling has become possible in place of a wooden frame structure that can be incinerated when it is aged or that can only be treated as industrial waste. Buildings such as steel houses with lightweight lightweight steel frames have been imported and become more widespread.For example, steel frame manufacturers and housing manufacturers are considering studying ways to build an experimental building or model building to conform to the Japanese climate. Piled up.

When a heat insulating wall is applied to such a steel frame, for example, FIG. 4 is a cross sectional view of the heat insulating wall.
In the case of a so-called outer heat-insulating structure wall as shown in (A) and (B), which is a cross-sectional view taken along the line Z-Z in (A), a heat insulating material 52 is provided on the outside (outdoor side o) of the steel frame 51 as a frame. The heat insulating material 52 is fastened to the steel frame 51 with heat insulating screws 53, and the body edge 54 provided outside the heat insulator 52 is fastened with the body edge screws 55.
The exterior material 56 disposed outside of the device is fastened with exterior material nails 57. Further, on the inside of the steel frame 51 (the indoor side i), wallpaper 60 is attached via a gypsum board 58.

Then, an inner space layer s is formed between the heat insulating material 52 and the gypsum board 58, and the heat insulating material 52 is formed.
A ventilation layer t is formed between the outer material 56 and the outer material 56. Further, in the case of a wall using both a so-called inner heat insulating structure and an outer heat insulating structure, not shown, the steel frames 51, 51 are not shown.
A heat insulator 52 is attached between the steel frame 51 and
The exterior material 5 is provided on the outside of the heat insulation material outside the
6, and a heat insulating material such as glass wool is accommodated in the internal space layer s.

[0005]

The above-mentioned buildings such as steel houses can be recycled even when the buildings are dismantled because the frame is made of iron. However, the thermal conductivity of metals such as steel ( Since about 38 to 47 kcal / m · h · ° C. is significantly higher than the thermal conductivity of wood (about 0.13 kcal / m · h · ° C.), so-called heat bridges easily cause internal dew condensation. There is a problem that metal parts such as are easily rusted.

That is, since the head of the body edge screw 55 is in direct contact with the exterior material 56, if a member having high heat insulation properties is not used as the exterior material 56, the outside air temperature is reduced to the metal exterior edge. There is a problem that the heat is transmitted to the steel frame 51 through the screw 55 (heat bridge), and especially in a cold region or the like, the tip of the low-temperature screw 55 faces the high-temperature internal space layer s and dew condensation easily occurs.

Further, in the case of the external heat insulating structure wall shown in FIG. 4, there is a similar problem with the heat insulating screw 53, and the position of the head of such a heat insulating screw 53 is not particularly considered. When the head of the screw 53 is directly exposed to the ventilation layer t, the outside air temperature is transmitted to the steel frame 51 through the heat-insulating material screw 53 having high thermal conductivity (heat bridge), and especially the screw facing the internal space layer s. Dew condensation was likely to occur at the tip 53 and the like. Such dew condensation in the interior causes rust on a metal portion such as the steel frame 51, and has a problem that durability is reduced and recycling is hindered.

By the way, the structure of the heat insulating wall in the wooden frame will be briefly described for comparison. As shown in FIG. 3, the heat insulating material 52 disposed on the outdoor side o of the wooden pillar 61 or the stud 62 is shown in FIG.
With heat insulating material screws 53 and heat insulating material 52
The outside edge of the body 54 is fastened by a body edge screw 55, and the exterior material 56 outside the body edge 54 is further secured by an exterior material nail 57. A wallpaper 60 is attached to the interior side i of the pillar 61 or the like via a gypsum board 58.

[0009] In such a heat insulating wall structure of a wooden frame, the tips of the body edge screws 55 and the heat insulating material screws 53 are driven into the wooden pillars 61 or studs 62 having low thermal conductivity. It is in a state, and there is no particular problem of dew condensation.

In view of this, there has been a demand for a technique for preventing dew condensation and rusting on the metal portion of the internal space layer, irrespective of the material of the exterior material, particularly in the heat insulating wall structure of a metal frame.

[0011]

In order to solve the above-mentioned problems, according to the present invention, a heat insulating material is fixed to at least the outside of a metal frame, and a body edge is fixed to the outside of the heat insulating material. Along with this, the heat insulation wall is designed to attach an exterior material to the body edge, and a body edge mounting bracket for fastening the body edge penetrates from the outside to the inside of the body edge, and then a part of the penetrated tip. In the heat-insulating wall structure fastened to the frame, the outside of the head of the rim mounting bracket is covered with a heat-insulating member, and the exterior material is attached to the outside.

In this way, by covering the outside (outdoor side) of the head of the rim mounting bracket with the heat insulating member and attaching the exterior material to the outside, heat transfer of outside air to the head of the rim mounting bracket is cut off. In addition, the heat bridging caused by the rim mounting bracket is prevented. Here, the configuration in which the heat insulating material is fixed to the outside of the shaft assembly is a so-called external heat insulating structure shown in FIG. 4, and the structure in which the heat insulating material is fixed between the shaft sets is a so-called internal heat insulating structure. And the body edge is fastened to the outside of the heat insulating material outside the frame, and the exterior material is attached to this body edge, but the head of the body edge mounting bracket is exposed on the outer surface of the body edge, so the head is Cover with heat insulating material. At this time, as the heat insulating member, the thermal conductivity is about 0.5.
Materials of 3 kcal / m · h · ° C or less can be applied.

According to the second aspect of the present invention, the heat insulating material mounting bracket for fixing the heat insulating material penetrates from the outside to the inside of the heat insulating material, and a part of the penetrated tip is fastened to the shaft assembly. In the above, the outside of the heat insulating material mounting bracket was covered by a rim having low thermal conductivity.

Here, the configuration of the heat insulating wall in which the heat insulating material is fixed to the outside of the frame is a so-called external heat insulating structure. Block heat transfer and prevent heat bridges due to the insulation fittings. As the body edge having a small thermal conductivity, any of natural wood, laminated wood, synthetic wood, plastic, etc., which are generally used as the body edge material, has low thermal conductivity and is generally suitable. Of about 0.3 kcal / m · h · ° C or less can be applied.

According to a third aspect of the present invention, a recess having a depth equal to or greater than the thickness of the head of the mounting bracket for fastening the trunk is formed in a predetermined portion of the trunk, and the head of the flange mounting bracket is immersed in this recess. After fastening at least, the recess was filled with a heat insulating member to cover the outside.

That is, if only the head of the mounting bracket is locally covered with the heat insulating member and the exterior material is attached, a gap is easily formed between the exterior material and the outer surface of the body edge. On the other hand, if the heat insulating member is interposed on the entire outer surface of the trunk edge, it is expensive. Therefore, if a recess is formed in the body edge, the head of the mounting bracket for fastening the body edge to the recess is immersed, and the recess is filled with a heat insulating member so that the outer surface is flush, and the exterior material is attached. The outer member can be firmly mounted, and can be constructed at a low cost.

Here, the heat insulating member to be filled into the concave portion is, for example, a resin applied by a simple resin spray or a packing made of plastic, wood, rubber, or the like having a low thermal conductivity. 0.3kcal / m ・ h ・ ℃ or less is applicable.

[0018]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 shows an example of the heat insulating wall structure of the present invention, in which (A) is a cross-sectional view, (B) is a cross-sectional view taken along the line XX of (A), and FIG. It is an explanatory view of a form in which the head of the mounting bracket is immersed in,
(A) is a perspective view of a body edge in which a recess is formed, and (B) is a cross-sectional view showing a state in which the recess is filled with a heat insulating member.

The embodiment of the heat-insulating wall structure shown in FIG. 1 shows an example of the structure of a so-called external heat-insulating heat-insulating wall. A rigid polyurethane foam or the like is provided on the outdoor side o of a metal frame 1 such as steel as a frame. And a metal heat-insulating screw 3 is screwed in from the outside of the heat-insulating material 2 and fastened to the metal frame 1, and the outside of the heat-insulating material 2 along the frame 1. Up and down wooden ventilation trunk 4
The metal frame screw 5 is screwed from the outside of the ventilation frame 4 and fastened to the metal frame 1. Incidentally, the screw 3 for the heat insulating material and the screw 5 for the body edge are a drilling screw or a tapping screw which can be screwed into a metal and has a cutting edge or a sharpened point at the tip of the screw.

An exterior material 6 is arranged outside the ventilation shell 4, and an exterior material nail 7 is driven in from the front side of the exterior material 6 and fastened to the ventilation shell 4, thereby fixing the heat insulating material 2 and the exterior material. 6 so that the ventilation layer t is formed. On the indoor side i of the metal frame 1, wallpaper 10 is attached via a gypsum board 8, and the inner space layer s is formed by the metal frame 1.
Is defined.

The basic structure of such a heat insulating wall structure is the same as the conventional structure except for a part. For example, in a cold region, even if the outside temperature is low with the heat insulating material 2 as a boundary, The interior side is maintained at a high temperature, and the moisture on the interior side gradually escapes to the ventilation layer t through the gypsum board 8, the heat insulating material 2 and the like, and then is sent upward through the ventilation layer t communicating with the outside of the building, and the interior of the building is It is discharged outside from the upper part.

By the way, in the present invention, the head of the screw 3 for the heat insulating material and the head of the screw 5 for the body edge projecting into the internal space layer s having a high temperature are prevented from coming into contact with the cold air. That is, as described above, when the heads of the screws 3 and 5 come into contact with cold air, the low thermal screws 3 and 5 and the metal frame 1 face the high internal space layer s due to high thermal conductivity. This causes condensation in the same part.

For this reason, first, the screw 3 for the heat insulating material is set at a position where the head of the screw is covered and covered by the ventilation shell 4 to block the transmission of the outside air. For this reason, the mounting position of the heat insulating material screw 3 is set to a position corresponding to, for example, the center of the ventilation trunk edge 4 in the width direction.

FIG. 2A shows the body edge screw 5.
A recess 4a is formed on the outer surface of the ventilation shell 4 as shown in FIG.
After the screw head is inserted into the recess 4a and fastened, as shown in (B), urethane 12 as a heat insulating member is filled in the recess 4a by a simple urethane spray 11 so as to cover the outside. I have.

In the embodiment, the diameter of the recess 4a is set to about w / 2 to w / 3 with respect to the width w of the ventilation shell 4 and the depth is set to be larger than the thickness of the screw head. The thickness d of the body edge 4 is set to about d / 2.

The filling of the urethane 12 is performed by
Is made flush with the outer surface of the ventilation shell 4 so that a gap is less likely to be formed between the exterior material 6 attached to the outside and the outer surface of the ventilation shell 4. The heat insulating member filled in the concave portion 4a may be other resin or the like of the urethane 12, and instead of filling the resin or the like, a packing made of rubber, wood, plastic, or the like may be packed.

The heat-insulating wall structure constructed as described above has a structure in which, even in a cold region or the like, the cool air on the outdoor side o is transmitted to the body edge screw 5 through the exterior material 6 or the cool air in the ventilation layer t is cooled. The problem that the temperature of the screws 5, 3 and the metal frame 1 becomes lower than the dew point temperature by being transmitted to the service screw 3 is eliminated, so that dew condensation can be prevented and rusting can be suppressed.

In the above-described heat insulating wall structure, if the metal frame 1 is made of a metal material having a thermal conductivity of about 1 kcal / m · h · ° C. or more, besides steel, etc. The invention is effective. In addition to the rigid polyurethane foam, the heat insulating material 2 has a heat conductivity of about 0, such as polyisocyanurate foam, styrene foam, phenol foam, polyethylene foam, glass wool, rock wool, cork, and cellulose fiber. .3kcal
/ m ・ h ・ ℃ or less can be applied.

Further, as the ventilation shell 4, in addition to natural wood, plywood, laminated veneer lumber (LVL), particle board, synthetic wood, laminated wood, plastic or the like has a thermal conductivity of about 0.3 kcal / m · h.・ Materials with temperature below ℃ can be used. Of course, when the recess 4a is formed in the ventilation drum edge 4 as in the embodiment, the shape, size, and the like of the recess 4a are arbitrary, and may be a groove, but it is not particularly necessary to provide the recess 4a. In this case, for example, a heat insulating member having a predetermined thickness is covered over substantially the entire outer surface of the body edge 4 and the exterior material 6 is attached from above so that the exterior material 6 can be assembled in a stable state. I do.

Further, in the present embodiment, the case of so-called external heat insulation has been described as an example. However, the present invention can also be applied to the case where internal heat insulation for fixing a heat insulating material to the internal space layer s between the metal frames 1 and 1 is also used. .

[0031]

As described above, according to the heat insulating wall structure of the present invention, in the heat insulating wall in which the body edge is attached to the metal frame by the body edge fitting, the head of the body edge attachment is provided. Since the portion is covered with a heat insulating member so as not to be exposed to cold air, it is possible to prevent internal dew condensation and rusting due to the heat bridge of the cooled body edge mounting bracket. Therefore, there is no problem in recycling. Further, if the outside of the heat insulating material mounting bracket is covered by the body edge as in claim 2, similarly, it is possible to prevent problems such as internal condensation and rusting caused by the heat bridge of the heat insulating material mounting material. Further, if the head of the mounting bracket for fastening the torso is immersed in the concave portion of the torso and the heat insulating member is filled in the concave, the exterior material can be attached in a stable state. Inexpensive configuration.

[Brief description of the drawings]

FIG. 1 shows an example of a heat insulating wall structure of the present invention, in which (A) is a cross-sectional view, and (B) is a cross-sectional view taken along line XX of (A).

FIGS. 2A and 2B are explanatory views of a form in which a head of a mounting bracket is immersed in a concave portion formed in a body edge; FIG. 2A is a perspective view of the body edge having a concave portion; FIG. Sectional view showing the filling state

3A and 3B show a heat insulating wall structure of a wooden frame, wherein FIG. 3A is a cross-sectional view and FIG. 3B is a cross-sectional view taken along line YY of FIG.

4A and 4B show a conventional heat insulating wall structure of a steel frame assembly, wherein FIG. 4A is a cross-sectional view, and FIG.

[Explanation of symbols]

1 ... metal frame, 2 ... heat insulator, 3 ... screw for heat insulator,
Reference numeral 4: Vent edge, 4a: recess, 5: screw for edge, 6: exterior material, s: internal space layer, 12: urethane.

Claims (3)

[Claims] 1. A heat insulating wall having a heat insulating material fastened at least outside a metal frame, a body edge fastened to the outside of the heat insulator, and an exterior material attached to the body edge. In a heat insulating wall structure in which a part of a penetrated tip is fastened to the frame after a body edge mounting bracket for fastening the body edge penetrates from the outside to the inside of the body edge, A heat insulating wall structure, wherein the outside of the head is covered with a heat insulating member, and the exterior material is attached to the outside. 2. The heat insulating wall according to claim 1, wherein the heat insulating material fixing bracket for fastening the heat insulating material penetrates from the outside to the inside of the heat insulating material, and then a part of the penetrating tip is formed. A heat insulating wall structure fastened to a frame, wherein the outside of the heat insulating material mounting bracket is covered by a rim having a low thermal conductivity. 3. The heat insulating wall structure according to claim 1, wherein a concave portion having a depth equal to or greater than a thickness of a head of the body edge mounting bracket is formed in a predetermined portion of the body edge. After the head of the body mounting bracket is immersed in the recess and fastened, the outside of the head of the body mounting bracket is covered with a heat insulating member by filling the recess with a heat insulating member. Heat insulation wall structure.