JP2021006688A - Underfloor heat insulation material and free access floor - Google Patents

Abstract

To provide a durable underfloor heat insulation material and a free access floor.SOLUTION: An underfloor heat insulation material 10 is laid on an underfloor foundation surface under a floor panel of a free access floor, and has a plate-shaped foamed resin layer 11 and a top surface metal layer 15 laminated on it and located on an uppermost surface. Since the uppermost surface of the underfloor heat insulation material 10 is formed of the top surface metal layer 15, wear of the underfloor heat insulation material 10 due to the work of routing the underfloor wiring is suppressed, and the durability of the underfloor heat insulation material 10 is improved. In addition, the top surface metal layer 15 also improves the fire resistance of the underfloor heat insulation material 10.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to underfloor insulation of raised floors and raised floors having underfloor insulation.

As this kind of underfloor heat insulating material, one made of foamed resin is known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-133998 (paragraph [0021])

However, it is required to improve the durability of the underfloor heat insulating material on the assumption that the underfloor wiring is frequently changed.

The invention of claim 1 made to solve the above problems is an underfloor heat insulating material laid under a floor panel of a raised floor, which is a plate-shaped foamed resin layer and a laminated and top surface thereof. An underfloor heat insulating material comprising an upper surface metal layer located in.

The invention of claim 2 is the underfloor heat insulating material according to claim 1, wherein the upper surface metal layer is an aluminum layer.

The invention of claim 3 is the underfloor heat insulating material according to claim 1 or 2, wherein a reinforcing sheet layer is laminated between the upper surface metal layer and the foamed resin layer.

The invention of claim 4 is the underfloor heat insulating material according to claim 3, wherein the reinforcing sheet layer is made of paper.

The invention of claim 5 is the underfloor heat insulating material according to any one of claims 1 to 4, wherein the foamed resin layer is a hard polyisocyanurate foam layer.

The invention of claim 6 is the underfloor heat insulating material according to any one of claims 1 to 5, wherein the foamed resin layer contains a glass mat layer inside the foamed resin layer.

The invention according to claim 7 is the underfloor heat insulating material according to any one of claims 1 to 6, wherein the total thickness of the underfloor heat insulating material is 5 to 60 [mm].

The invention of claim 8 is the underfloor heat insulating material according to any one of claims 1 to 7, wherein the lower surface metal layer is laminated under the foamed resin layer and is located on the lowermost surface.

The invention of claim 9 is the underfloor heat insulating material according to claim 8, wherein the upper surface metal layer and the lower surface metal layer have the same structure.

The invention according to claim 10 is any one of claims 1 to 9, wherein corner cutouts are provided at four corners in order to avoid interference with columns that stand up from the floor foundation surface of the building and support the floor panel from below. The underfloor insulation material described in the section.

The invention of claim 11 is the underfloor heat insulating material according to claim 10, wherein the corner cutout portion is formed by cutting the four corners of the floor panel into a 1/4 arc shape.

The invention of claim 12 stands up from the underfloor heat insulating material according to any one of claims 1 to 11, a metal floor panel facing the underfloor heat insulating material from above, and a floor foundation surface of a building. It is a free access floor having columns that support the four corners of the floor panel from below.

In the configurations of claims 1 and 12, since the uppermost surface of the underfloor heat insulating material is an upper surface metal layer, wear of the underfloor heat insulating material due to the work of routing the underfloor wiring is suppressed, and the durability of the underfloor heat insulating material is improved. .. The top metal layer also improves the fire resistance of the underfloor insulation. Here, the upper surface metal layer may be any metal, and examples thereof include an aluminum layer, an iron layer, a copper layer, and a SUS layer. However, as in the configuration of claim 2, the upper surface metal layer is an aluminum layer. For example, the underfloor heat insulating material can be made cheaper and lighter, and the appearance is improved. Further, if the reinforcing sheet layer is laminated between the foamed resin layer and the upper surface metal layer as in the configuration of claim 3, peeling, breakage, and breakage of the upper surface metal layer can be prevented, and the durability of the underfloor heat insulating material can be prevented. Is further improved. The reinforcing sheet layer may be made of paper as in the configuration of claim 4, or may be made of resin or fiber.

Further, as the foamed resin layer, for example, it is preferable to have a closed cell structure, and examples thereof include a styrofoam layer, a rigid polyurethane foam layer, a rigid polyisocyanurate foam layer, and the like. It is preferable that the foamed resin layer is a hard polyisocyanurate foam layer having a closed cell structure from the viewpoints of heat insulation, heat resistance, and moldability. Further, if the structure includes the glass mat layer in the foamed resin layer as in the underfloor heat insulating material of claim 6, the warp of the underfloor heat insulating material can be prevented.

Considering the heat insulating property and practicality of the underfloor heat insulating material, the underfloor heat insulating material preferably has an overall thickness of 5 to 60 [mm] as in the configuration of claim 7.

Since the lowermost surface of the underfloor heat insulating material according to claim 8 is a lower surface metal layer, wear due to friction with the floor foundation surface of the building is suppressed, and durability is improved. Further, if the upper surface metal layer and the lower surface metal layer have the same structure as in the underfloor heat insulating material of claim 9, the upper and lower metal layers can be used without distinction, and the underfloor heat insulating material can be laid efficiently. Can be done.

Since the underfloor heat insulating material according to claim 10 is provided with corner notches at the four corners for avoiding interference with the columns supporting the floor panel, the laying work becomes easy. Further, since the underfloor heat insulating material according to claim 11 has a corner notch having a 1/4 arc shape, the underfloor heat insulating material is fitted and positioned inside the four columns, and the laying work is easy. Become. In addition, if a corner notch is provided in the underfloor heat insulating material in advance, cutting at the construction site becomes unnecessary, which not only reduces the number of laying work steps, but also causes the site to become dirty due to scattering of scraps during cutting, or scraps. It is possible to eliminate the labor of cleaning up.

Perspective view of raised floor according to the embodiment of the present disclosure Disassembled perspective view of raised floor View of raised floor Side section of underfloor insulation

Hereinafter, embodiments of the raised floor 40 will be described with reference to FIGS. 1 to 4. The free access floor 40 of the present embodiment shown in FIG. 1 is a so-called panel / support separation type in which a floor panel 20 and a plurality of columns 31 supporting the floor panel 20 are separated.

As shown in FIG. 2, the floor panel 20 has a structure in which a square frame-shaped rib 21 slightly smaller than the lower surface of the square panel main body 22 is provided.

The support column 31 is provided with a mounting plate 35 fixed to the lower end of the cylindrical support column body 31H. A female screw portion (not shown) is formed inside the support column main body 31H, and a male screw portion (not shown) of the movable shaft 33S is screwed therein. Further, a propeller-shaped operating member 32 projects at a position near the upper end of the movable shaft 33S. Further, a quadrangular panel support plate 33 is provided on the upper portion of the movable shaft 33S, and the panel support protrusion 34 projects from a substantially cross-shaped region of the upper surface of the panel support plate 33 excluding four corners. There is.

Further, the height difference between the upper surface of the panel support plate 33 and the upper surface of the panel support protrusion 34 is substantially the same as the height difference between the lower surface of the frame-shaped rib 21 and the lower surface of the panel main body 22 in the floor panel 20. The floor panel 20 and the support column 31 described above are both made of metal, but may be made of resin.

As shown in FIG. 1, the columns 31 are arranged in a plurality of rows and columns on the underfloor foundation surface 41A of the building at the same pitch as the vertical and horizontal sides of the floor panel 20. Then, the mounting plate 35 and the concrete underfloor foundation portion 41 of the building are fixed by an adhesive, so that the support column 31 is fixed in a state of standing upright from the underfloor foundation surface 41A. Specifically, a predetermined amount of adhesive is applied to the underfloor foundation portion 41, and the mounting plate 35 (post 31) is pressed from above. At that time, since the adhesive leaks from the through holes at the four corners of the mounting plate 35, the anchor effect of the adhesive works, and the support column 31 can be firmly fixed to the underfloor foundation portion 41. After that, the height of the movable shaft 33S is adjusted by operating the operation member 32 so that the upper surfaces of the panel support protrusions 34 of the plurality of columns 31 are located in a common horizontal plane. Then, each of the vertical and horizontal sides of the panel support plate 33 is arranged so as to be substantially parallel to the vertical and horizontal arrangement directions of the columns 31.

In this state, the plurality of floor panels 20 are sequentially fitted inside the panel support protrusions 34 of the four columns 31 (see FIG. 3). As a result, as shown in FIG. 1, a plurality of floor panels 20 are arranged in a plurality of rows and a plurality of columns on the plurality of columns 31.

The free access floor 40 of the present embodiment is provided with an underfloor heat insulating material 10 laid under the underfloor foundation surface 41A under each floor panel 20. As shown in FIG. 2, the underfloor heat insulating material 10 has a flat plate shape as a whole, and each corner portion of a square whose planar shape is substantially the same as the planar shape of the floor panel 20 is cut into a 1/4 arc shape. It has a shape. Then, as shown in FIG. 3, the underfloor heat insulating material 10 is arranged directly below the floor panel 20 in a state where the support columns 31 are received by the corner cutouts 19 of the underfloor heat insulating material 10. Here, if the underfloor heat insulating material 10 is a sheet-like material such as a non-woven fabric, the work of smoothing out wrinkles is forced after laying, but since the underfloor heat insulating material 10 is flat as described above, such work is required. No work is required. Further, since the underfloor heat insulating material 10 has the same structure on both the upper and lower sides as described later, it can be laid on the underfloor foundation portion 41 without considering the upper and lower sides. Further, the underfloor heat insulating material 10 and the mounting plate 35 (post 31) can be fixed by using the adhesives leaking from the four corners of the mounting plate 35 described above. The fixing of the underfloor heat insulating material 10 to the mounting plate 35 and the fixing of the mounting plate 35 (post 31) to the underfloor foundation portion 41 can be performed with the same adhesive. As a result, the man-hours for fixing the mounting plate 35 and the underfloor heat insulating material 10 to the underfloor foundation portion 41 can be simplified, and the types of adhesives used can be reduced.

Then, the underfloor heat insulating materials 10 that are laid and adjacent to each other are in a state where the side surfaces of the floor panels 20 that are adjacent to each other are adjacent to each other or are in contact with each other, and the floor panel 20 of the underfloor foundation surface 41A Almost the entire area beneath the group is covered with the underfloor insulation 10. Further, the four corners of the underfloor heat insulating material 10 are supported from below by the mounting plate 35 of the support column 31, and an air layer corresponding to the thickness of the mounting plate 35 is formed between the underfloor heat insulating material 10 and the underfloor foundation portion 41. To.

FIG. 4 shows the cross-sectional structure of the underfloor heat insulating material 10. As shown in the figure, the underfloor heat insulating material 10 has a structure in which the foamed resin layer 11 is sandwiched between the upper surface metal layer 15 and the lower surface metal layer 17. The upper surface metal layer 15 is, for example, an aluminum layer, and a paper reinforcing sheet layer 14 is laminated between the upper surface metal layer 15 and the foamed resin layer 11.

The lower surface metal layer 17 has the same structure as the upper surface metal layer 15 (that is, a structure having the same material and thickness), and between the lower surface metal layer 17 and the foamed resin layer 11, the structure is the same as that of the reinforcing sheet layer 14. The reinforcing sheet layer 16 is laminated. The upper surface metal layer 15, the reinforcing sheet layer 14, the lower surface metal layer 17, and the reinforcing sheet layer 16 are fixed by, for example, an adhesive. Hereinafter, when the upper surface metal layer 15 and the lower surface metal layer 17 are not distinguished, they are collectively referred to as “metal layers 15 and 17”.

In the underfloor heat insulating material 10 of the present embodiment, the metal layers 15 and 17 are made of aluminum, but may be copper, iron, SUS or the like. Further, although the metal layers 15 and 17 have the same structure, at least one of the thickness and the material may be different. Further, the surface thereof may be subjected to processing such as unevenness, or a surface layer such as paint may be applied. Further, although the reinforcing sheet layers 14 and 16 of the present embodiment are made of paper (kraft paper), they are made of a resin such as a thermoplastic resin such as a polyethylene resin or a thermosetting resin such as an epoxy resin. It may be present, or it may be made of a fiber such as a non-woven fabric. These reinforcing sheet layers may be used as a single layer, or may be used as a plurality of layers, for example, by combining paper and resin.

The foamed resin layer 11 of the present embodiment is a hard polyisocyanurate foam layer, and a glass mat layer 13 is provided therein. Here, the underfloor heat insulating material 10 is produced by discharging a polyurethane raw material between the metal layer 15 and the metal layer 17, and a continuous long underfloor heat insulating material 10 is formed by integral foaming. The glass mat layer 13 is continuously fed together with the metal layer 15 or the metal layer 17, and is arranged at an arbitrary position inside the foamed resin layer 11 in the thickness direction. As a result, the underfloor heat insulating material 10 including the glass mat layer 13 inside the foamed resin layer 11 and having the metal layer 15 and the metal layer 17 on the surface thereof can be easily produced. In this way, by arranging the metal layers 15 and 17 made of aluminum on both sides of the foamed resin layer 11 in which the reinforcing sheet layers 14 and 16 made of kraft paper are arranged on the foamed resin layer 11 side, the underfloor heat insulating material 10 It is possible to further improve the flammability and heat insulating property of the plastic, and to improve the workability. Further, since the glass mat layer 13 is contained inside the foamed resin layer 11, it is possible to prevent the underfloor heat insulating material 10 from warping.

The hard polyisocyanurate foam layer constituting the foamed resin layer 11 of the present embodiment has a closed cell structure, a density of 38 kg / m ³ , an oxygen index of 26%, and an initial value of thermal conductivity. The rate is 0.022 W / m · K, which is excellent in flame retardancy and heat insulation. Further, the glass mat layer 13 is formed by adhering a plurality of fiber strands (for example, a length of 10 to 60 [mm]) formed by bundling a plurality of glass fibers in a state of being dispersed in a plane.

The thickness of the underfloor heat insulating material 10 of the present embodiment is preferably, for example, 5 to 60 [mm], and more preferably 10 to 30 [mm]. By setting the underfloor heat insulating material 10 to the above thickness, it is possible to secure the heat insulating property, improve the workability, and secure the underfloor space.

This concludes the description of the configuration of the free access floor 40 of the present embodiment. Next, the operation and effect of the free access floor 40 will be described. In the raised floor 40, the underfloor wiring is placed on the underfloor heat insulating material 10. At that time, the wiring may be dragged on the underfloor heat insulating material 10. On the other hand, since the uppermost surface of the underfloor heat insulating material 10 is the upper surface metal layer 15, wear is suppressed and the durability is higher than that of the conventional one. As a result, the generation of dust from the underfloor heat insulating material 10 due to wear can be suppressed, and the underfloor heat insulating material 10 can be maintained in a good-looking state. Further, since the frictional resistance between the underfloor heat insulating material 10 and the wiring is small, the work of dragging the wiring can be easily performed. Further, the upper surface metal layer 15 can suppress the generation of static electricity between the wiring and the underfloor heat insulating material 10. In addition to these, the upper surface metal layer 15 and the lower surface metal layer 17 also have the effect of improving the fire resistance of the underfloor heat insulating material 10.

The underfloor space between the floor panel 20 and the underfloor heat insulating material 10 may be used as a space for supplying cold air or warm air by air conditioning, in addition to the above-mentioned wiring storage space. On the other hand, since the underfloor heat insulating material 10 includes the foamed resin layer 11 as a main portion, heat transfer between the cold air and warm air in the underfloor space and the underfloor foundation portion 41 is preferably suppressed. Further, since a gap (air layer) is formed between the underfloor heat insulating material 10 and the underfloor foundation portion 41 by the mounting plate 35 of the support column 31, a high heat insulating effect can be obtained also by this. Further, a heat insulating effect can be obtained by reflecting infrared rays between the metal layers 15 and 17 on both the upper and lower sides of the underfloor heat insulating material 10.

Since the underfloor heat insulating material 10 has the metal layers 15 and 17, it is expected to have an electromagnetic wave shielding effect. Further, when the lower surface of the underfloor heat insulating material 10 and the underfloor foundation portion 41 come into contact with each other, the effect of suppressing the wear of the lower surface of the underfloor heat insulating material 10 by the lower surface metal layer 17 can be obtained.

[Other Embodiments]
(1) The underfloor heat insulating material 10 of the above embodiment includes both the upper surface metal layer 15 and the lower surface metal layer 17, but may have a structure including only the upper surface metal layer 15.

(2) The corner cutout portion 19 of the underfloor heat insulating material 10 of the above embodiment has a 1/4 arc shape, but the corner cutout portion 19 is a square corner portion having a planar shape of the underfloor heat insulating material 10. , A so-called chamfered shape may be cut out to form a corner notch.

(3) The free access floor 40 of the above embodiment is a panel / support separation type in which the floor panel 20 and the plurality of columns 31 supporting the floor panel 20 are separated, but the floor panel and the plurality of columns are integrated. An underfloor heat insulating material having the above structure may be provided on the raised floor with integrated panels and columns. Specifically, for example, the underfloor heat insulating material disclosed in JP-A-2014-133998 may have a structure in which the upper surface metal layer 15 or both the upper surface metal layer 15 and the lower surface metal layer 17 are provided.

10 Underfloor insulation 11 Foamed resin layer 13 Glass mat layer 14, 16 Reinforcing sheet layer 15 Upper surface metal layer 17 Lower surface metal layer 19 Corner notch 20 Floor panel 31 Strut 40 Free access floor 41A Underfloor foundation surface

Claims (12)

Underfloor insulation laid under raised floor panels on raised floors
An underfloor heat insulating material including a plate-shaped foamed resin layer and a top metal layer laminated on the plate-shaped foamed resin layer and located on the uppermost surface. The underfloor heat insulating material according to claim 1, wherein the upper surface metal layer is an aluminum layer. The underfloor heat insulating material according to claim 1 or 2, wherein a reinforcing sheet layer is laminated between the upper surface metal layer and the foamed resin layer. The underfloor heat insulating material according to claim 3, wherein the reinforcing sheet layer is made of paper. The underfloor heat insulating material according to any one of claims 1 to 4, wherein the foamed resin layer is a hard polyisocyanurate foam layer. The underfloor heat insulating material according to any one of claims 1 to 5, wherein the foamed resin layer contains a glass mat layer inside the foamed resin layer. The underfloor heat insulating material according to any one of claims 1 to 6, wherein the total thickness of the underfloor heat insulating material is 5 to 60 [mm]. The underfloor heat insulating material according to any one of claims 1 to 7, wherein the underfloor heat insulating material is laminated under the foamed resin layer and includes a lower surface metal layer located on the lowermost surface. The underfloor heat insulating material according to claim 8, wherein the upper surface metal layer and the lower surface metal layer have the same structure. The underfloor heat insulating material according to any one of claims 1 to 9, which is provided with corner notches at four corners for avoiding interference with columns that stand up from the floor foundation surface of the building and support the floor panel from below. .. The underfloor heat insulating material according to claim 10, wherein the corner notch is formed by cutting the four corners of the floor panel into a quarter arc shape. The underfloor heat insulating material according to any one of claims 1 to 11.
A metal floor panel facing the underfloor insulation from above,
A raised floor having columns that stand up from the floor foundation surface of the building and support the four corners of the floor panel from below.

Images