JPH11172801A - Heat insulation method of h-shaped steel, heat insulation structure of h-shaped steel, and heat insulating foam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote heat insulation efficiency of H-shaped steel constituting a skeleton of steel frame construction. SOLUTION: A foam 2 monolithically having a fitting section 2a fitted between both up and down flanges 1a and 1b of an H-shaped steel 1 and a cover section 2b covered in opposition to the end faces 1d of both up and down flanges 1a and 1b when it is fitted to the H-shaped steel is formed. The fitting section 2a of the foam 2 is pushed between both up and down flanges 1a and 1b of the H-shaped steel 1 as a beam to fit and is maintained. Then, the whole side including the end faces 1d of both flanges 1a and 1b of the H-shaped steel 1 is opposingly covered with the cover section 2b to cut off thermal radiation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulation method for rationally realizing heat insulation between upper and lower flanges of an H-shaped steel constituting a building body of a building, a heat insulation structure, and a method of manufacturing an H-shaped steel. The present invention relates to a foam that can provide heat insulation between flanges.

[0002]

2. Description of the Related Art In a building represented by a house, a heat insulating material is filled for the purpose of improving heating efficiency and cooling efficiency to save energy. In wooden houses, the pillars and beams that make up the skeleton have some heat insulation properties, so it is possible to obtain an effect only by filling the space between the pillars and beams with heat insulating material. Insulation cannot be expected.

[0003] In a steel-framed house, an ALC (lightweight cellular concrete) panel is generally used as an outer wall material, and the heat insulating property of the ALC panel and the heat insulating material filled between columns and beams make it a building. Has an insulating effect. However, higher heat insulation effects are expected mainly in cold regions.

[0004] That is, as shown in FIG.
Is filled only between the columns and the beams 52, for example, the beams 52 serve as a thermal bridge and conduct heat to the indoor side, so that a high heat insulating effect cannot be expected. For this reason, urethane foam is sprayed on the exposed surfaces of the upper and lower flanges 52a and the web 52b of the H-shaped steel constituting the beam 52, or, as shown in FIG. By providing 53, heat insulation is provided.

[0005]

As described above, when heat-insulating properties are imparted to a beam made of H-section steel, if urethane foam is sprayed on the flange and the web, there is a problem that the work is complicated and the construction period is long.

In order to improve workability, it is preferable to fit the foam between the upper and lower flanges to hold the foam. In this case, the foam is held between the upper and lower flanges. There is a problem that it is difficult to judge the pressing depth at the time of pressing into the work, and that the workability is poor, and there is a problem that the end face of the flange is exposed and good heat insulating property cannot be obtained. Further, bolts are often present on the web and flange of the beam. In this case, however, it is necessary to cut out the foam, and there is a problem that the operation is complicated.

In particular, it has recently been required to improve the airtightness, and it is expected to develop a structure having both airtightness and heat insulation.

[0008] An object of the present invention is to provide a heat insulating method and a heat insulating structure capable of securing the heat insulating property of a beam or a column made of H-section steel, and a foam for imparting heat insulating property to the beam.

[0009]

Means for Solving the Problems In order to solve the above-mentioned problems, the heat insulation method for H-section steel according to the present invention is a heat insulation method for insulating between the end faces of the upper and lower flanges of the H-section steel constituting the frame of the building. In the method, a foam having a cover and a fitting portion is prepared, and the fitting portion of the foam is pressed between the upper and lower flanges of the H-shaped steel to be fitted together. It is characterized in that it covers between the end faces of the upper and lower flanges.

In the heat insulation method of the H-section steel, the foam is attached to the H-section steel by pushing a fitting portion formed on the foam between the upper and lower flanges of the H-section steel and fitting them together. I can do it. At this time, it is possible to cover between the end faces of the upper and lower flanges of the H-section steel with the cover formed in the foam.

The heat-insulating structure for H-section steel according to the present invention is a heat-insulating structure for insulating between the end faces of upper and lower flanges of an H-section steel constituting a building body of a building. The fitting portion of the foamed material is fitted between the upper and lower flanges of the H-shaped steel, and the cover portion covers the end faces of the upper and lower flanges of the H-shaped steel.

In the heat-insulating structure of the H-section steel, the foam is held between the upper and lower flanges of the H-section steel, and the exposed portions on the side surfaces of the H-section steel are covered with the foam, so that the H-section steel is insulated. Properties can be imparted.

Further, the foam for heat insulation according to the present invention is a foam for insulating between the end faces of upper and lower flanges of an H-shaped steel constituting a frame of a building. And a fitting portion fitted between the upper and lower flanges of the H-section steel are integrally provided, and a dimension of contact between the covering portion and the flange end surface is equal to the upper surface of the upper flange and the lower portion. It is equal to or slightly larger than the dimension between the lower surfaces of the flanges, and the dimension between the contact of the fitting portion with the flange is slightly larger than the dimension between the lower surface of the upper flange and the upper surface of the lower flange. is there.

In the heat insulating foam, the cover portion and the fitting portion are integrally formed, and the size of the fitting portion is formed to be slightly larger than the size between the lower surface of the upper flange and the upper surface of the lower flange. Therefore, the fitting portion can be held by being pushed between the upper and lower flanges, and the size of the cover portion is equal to or slightly larger than the size between the upper surface of the upper flange and the lower surface of the lower flange. When the fitting portion is fitted between the upper and lower flanges, the ends of the cover portions face the end surfaces of the upper and lower flanges. For this reason, heat insulation can be provided by covering the exposed portions on the side surfaces of the H-section steel.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the heat-insulating method and heat-insulating structure of the above-mentioned H-section steel, and furthermore, a preferred embodiment of a heat-insulating foam will be described with reference to the drawings. FIG. 1 is a diagram illustrating a relationship between an H-shaped steel and a foam, FIG. 2 is a diagram illustrating a heat insulating structure of the H-shaped steel, FIG. 3 is a diagram illustrating an example of a shape of the foam, and FIG. FIG. 6 is a view for explaining the engagement between the fitting portion and the cover portion in FIG.

The H-shaped steel heat insulation method according to the present embodiment insulates the entire upper and lower flanges 1a and 1b and the web 1c exposed on the indoor side surface of the H-shaped steel 1 mainly constituting the beam of the steel frame. By covering with foam 2 having properties,
It can realize a high degree of heat insulation, and can also provide the airtightness of the building.

The H-section steel 1 has a predetermined length and comprises an upper flange 1a, a lower flange 1b and a web 1c, and the upper and lower flanges 1a and 1b have a predetermined thickness. The end face 1d is formed at the free end in the width direction.

When the H-shaped steel 1 is used as a beam for a building frame, the upper part of the upper flange 1a and the lower part of the lower flange 1b are filled with a heat insulating material 3 (see FIG. 2). Therefore, the side surfaces including the end surfaces 1d of the upper and lower flanges 1a and 1b and the web 1c are exposed, and the H-shaped steel 1 itself functions as a heat transfer member, and the side surfaces function as heat radiation surfaces.

For this reason, by covering the entire side surface including the end surface 1d of the H-section steel 1 with the foam 2, heat radiation is blocked and the heat insulating property is improved.

The foam 2 is made of a heat-insulating synthetic resin, and is formed as an elongated molded body integrally formed with a fitting portion 2a and a cover 2b. As the foam 2, any synthetic resin having heat insulation properties can be used.
In the present embodiment, a foamed polyethylene-based foam expanded 90 times is used as the foam 2.

The fitting portion 2a of the foam 2 is fitted between the lower surface of the upper flange 1a and the upper surface of the lower flange 1b by being pushed between the lower surface of the upper flange 1a and the upper surface of the lower flange 1b, and has a function of maintaining this fitted state. . Therefore, when the dimension between the upper and lower flanges 1a and 1b of the H-section steel 1 is Imm, the width dimension imm of the fitting portion 2 is formed to be slightly larger than I. For example, in this embodiment, when the I dimension of the H-section steel 1 is 238 mm, the i dimension of the fitting portion 2a is set to 245 mm.

As described above, the upper and lower flanges 1 of the H-section steel 1
When the size of the fitting portion 2a of the foam 2 is slightly larger than the dimension I between a and 1b, when the foam 2 is pushed into and fitted between the upper and lower flanges 1a and 1b of the H-section steel 1, The fitted state can be maintained by the elasticity of the foam 2.

In the experiment of the present inventors, the ratio of i / I was 1.
When it was in the range of 01 to 1.04, it was easy to push the foam 2 into the H-section steel 1 and it was possible to maintain the fitted state well.

When the fitting portion 2a is pushed into and fitted between the upper and lower flanges 1a and 1b of the H-section steel 1, the cover 2b of the foam 2 is fitted to the upper and lower flanges 1a and 1b of the H-section steel 1. It has a function of opposing the end face 1d and covering the end face 1d, and a function of defining the depth of pushing the foam 2 between the upper and lower flanges 1a and 1b, that is, a function as a stopper. For this reason, the width dimension hmm of the cover 2b is formed to be slightly larger than the dimensions of the upper surface of the upper flange 1a of the H-section steel 1 and the lower surface of the lower flange 1b. The dimension is a dimension that can vary depending on the thickness of the foam 2, the dimension H from the upper surface of the upper flange 1 a to the lower surface of the lower flange 1 b in the H-section steel 1, and the elasticity of the foam 2. is there.

Therefore, the fitting portion 2a is connected to the upper and lower flanges 1a,
The cover 2b can face the end face 1d and cut off the function of the end face 1d as a heat radiating surface, regardless of the shrinkage of the dimension generated in the foam 2 when pushed between the foams 1b. For example, in this embodiment, when the H dimension of the H-section steel 1 is 250 mm, the h dimension of the cover 2b of the foam 2 is set to 255 mm.

It is not necessary to set the h / H ratio strictly. When the foam 2 is fitted to the H-section steel 1, the cover 2 b
Is preferably flush with the upper and lower surfaces of the upper and lower flanges 1a and 1b of the H-section steel 1 or slightly protrude.

Next, a procedure for fitting the foam 2 to the H-shaped steel 1 used as the building body of the building to perform heat insulation will be described.

As shown in FIG. 2, each of the flanges 1 is provided at the upper part of the upper flange 1a and the lower part of the lower flange 1b of the H-section steel 1 used as a beam constituting the frame of the building.
A heat insulating material 3 is filled along a and 1b, and an outer wall 4 made of, for example, an ALC panel is formed on the outdoor side.

By pushing the fitting portion 2a of the foam 2 between the lower surface of the upper flange 1a and the upper surface of the lower flange 1b of the H-section steel 1,
a and 1b. Upper and lower flanges 1 of H-section steel 1
In the foam 2 held between a and 1b, the cover 2b is in contact with the end face 1d of each of the flanges 1a and 1b so as to block heat radiation.

By repeating the above operation and fitting the foam 2 between the upper and lower flanges 1a and 1b of the H-section steel 1,
It is possible to cover the entire exposed surface of the section steel 1 with the foam 2, thereby blocking the heat radiation surface of the H section steel 1 and improving the heat insulation.

The foam 2 is fitted by pushing the fitting portion 2a between the upper and lower flanges 1a and 1b of the H-section steel 1. The fitting state is maintained, and the cover 2b is exposed to the H-section steel 1. Cover the sides. At this time, the shape of the foam 2 has a shape corresponding to the shape around the target H-shaped steel 1 so that the cover portion 2b can surely cover the side surface of the H-shaped steel 1 and block the heat radiation surface. Is preferred.

That is, the foam 2 does not need to have a simple convex cross section as shown in FIG. 1, and as shown in FIG. 3A, the upper flange 1a of the H-section steel 1 of the cover 2b. The lower flange 1b side may be formed longer, as shown in FIG. Further, as shown in FIG. 3C, a groove 2c is formed in one of the upper and lower flanges 1a and 1b, and the flange 2 is formed by the groove 2c.
a or 1b may be formed.

When the fitting portion 2a of the foam 2 is pushed between the upper and lower flanges 1a and 1b of the H-section steel 1, it can be fitted to these flanges 1a and 1b with sufficient elasticity. In addition, it is preferable to set the shape of the portion where the fitting part 2a and the cover part 2b are engaged. 4A to 4E show examples of such a shape.

That is, FIG. 2A shows the fitting portion 2a and the cover portion 2a.
b is formed at a substantially right angle.

FIG. 2B shows a rectangular projection 2d formed on the fitting portion 2a, and the tip of the projection 2d is connected to each flange 1a.
a and 1b are brought into contact with each other. In this case, when the fitting 2a is fitted to the H-section steel 1, the projection 2
It is unlikely that only d will shrink and change the dimensions of the cover 2b.

FIG. 3C shows a form in which the protruding portion 2d is formed on the fitting portion 2a in the same manner as described above.
Is formed with a curved projection 2d.
FIG. 4E shows a hook-shaped projection 2d formed. When any of these is fitted to the H-section steel 1, only the protrusion 2 a contracts and the dimensional change of the cover 2 b can be minimized.

[0037]

As described above in detail, in the heat-insulating method for H-section steel according to the present invention, by fitting the fitting portion of the foam between the upper and lower flanges of the H-section steel, the foam is fitted to the foam. The formed cover portion can be covered so as to face all side surfaces including the end surfaces of the upper and lower flanges.

In the heat-insulating structure for H-section steel according to the present invention,
Since the exposed surface composed of the side surface of the H-section steel is covered with the cover of the foam, heat radiation from the exposed surface can be blocked to improve heat insulation.

In the foam for heat insulation according to the present invention, H
Since the fitting part fitted between the upper and lower flanges of the shaped steel and the cover part covering the end face of each flange are formed integrally, when the fitting part is fitted between the upper and lower flanges, the foam Is held by the H-section steel, and at the same time, the cover portion faces the side faces of the H-section steel, and can block heat radiation from these side faces.

In particular, the cover has a function as a stopper when it comes into contact with the end face of each flange, so that the depth of pushing the foam into the H-section steel can be kept constant. Therefore, it is possible to prevent variations in the construction according to the personality of the worker, and it is possible to secure good and stable heat insulation.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a relationship between an H-section steel and a foam.

FIG. 2 is a diagram illustrating a heat insulation structure of an H-section steel.

FIG. 3 is a diagram illustrating an example of the shape of a foam.

FIG. 4 is a view for explaining engagement between a fitting portion and a cover portion in a foam.

FIG. 5 is a diagram illustrating a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 H-shaped steel 1a Upper flange 1b Lower flange 1c Web 1d End surface 2 Foam 2a Fitting part 2b Covering part 2c Groove 2d Projection part 3 Heat insulating material 4 Outer wall

Claims (3)

[Claims] In a heat insulation method for insulating between end faces of upper and lower flanges of an H-shaped steel constituting a building body of a building, a foam having a cover portion and a fitting portion is prepared. A heat insulation method for H-section steel, characterized in that the fitting section is pushed between the upper and lower flanges of the H-section steel to fit together, and the cover covers the end faces of the upper and lower flanges of the H-section steel. 2. A heat insulation structure for insulating between end faces of upper and lower flanges of an H-shaped steel constituting a building body of a building, wherein the fitting portion of the foam having a cover portion and a fitting portion is H-shaped. A heat insulating structure for an H-shaped steel, wherein the heat-fitting structure is fitted between upper and lower flanges of the steel, and an end face between the upper and lower flanges of the H-shaped steel is covered with the cover. 3. A foam for thermally insulating between end faces of upper and lower flanges of an H-shaped steel constituting a building body of a building, wherein a cover covering between end faces of the upper and lower flanges of the H-shaped steel is provided. H
A fitting portion fitted between the upper and lower flanges of the shaped steel is integrally provided, and a dimension between the contact of the cover and the flange end face is equal to or equal to a dimension between an upper surface of the upper flange and a lower surface of the lower flange. A foam for heat insulation, wherein the foam is slightly larger than the dimension, and the dimension between the contact of the fitting portion with the flange is slightly larger than the dimension between the lower surface of the upper flange and the upper surface of the lower flange.