JP2863120B2 - Underfloor insulation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underfloor heat insulating material attached to the back of a floor in order to improve the heat insulation of the floor.
In particular, the present invention relates to an underfloor heat insulating material which is in close contact with a joist and whose central portion does not drip for a long time without using a mounting bracket.

[0002]

2. Description of the Related Art In recent years, buildings have been insulated for the purpose of energy saving, and as a part thereof, various heat insulating materials and heat insulating methods have been used under the floor in order to prevent heat radiation from the floor surface. In many cases, a heat insulating material such as a synthetic resin foam is inserted between joists under the floor. These heat insulating materials were formed into a rectangular thick plate that fits between the joists, and were attached with both ends placed on a large scale. However, there is a problem that the heat insulating material hangs down at the center due to a large interval of the drawing, and a gap is generated between the heat insulating material and the floorboard or joist, so that a sufficient heat insulating effect cannot be obtained. In order to solve this problem, it has been practiced to support the heat insulating material by hanging the metal fittings on the joists. However, it is troublesome and costly. Kaihei 6
No. -78410, the upper surface is slightly widened by providing vertical split grooves extending over the entire length along a side surface parallel to the joist, and is mounted between the joists by pushing.
Insulation plates that do not require metal fittings, insulation panels described in Japanese Utility Model Application Laid-Open No. 5-62606, in which at least one pair of structural members (joists) and an insulation material are integrated, have come to be used.

[0003]

It is presumed that the heat insulating plate or the like according to the invention or the invention has a certain effect. However, the adhesive strength to the joists and the supporting force of the heat insulating plate itself are not sufficient, and the center hangs down over time, reducing the heat insulating effect, and easily damaging the outer edge of the groove during construction. There are issues, and further improvements are desired. Further, a panel in which a joist and a heat insulating material are integrated is easily used in a highly standardized building, but it is difficult to flexibly meet various requirements in general building. In order to improve the underfloor heat insulating material, a member having high adhesion at the joist and capable of improving the heat insulating property and the supporting force is required, but on the other hand, the construction must be easy and flexible. The present invention has been completed as a result of research on an underfloor heat insulating member that has high heat insulating properties and support capacity, is easy to construct, and has flexibility.

[0004]

In order to solve the above-mentioned problems, it is fitted between adjacent joists and attached to the underside of the floor.
Plate-shaped rectangular underfloor insulation, side 1 in contact with joists
A convex portion 3 having a height (H ₁ ) of 2 to 10 mm formed by a surface 10 having a lower edge inclined upward and outward in the length direction (hereinafter, referred to as a side surface) has a length of the side surface. At least two slots 4 per 1 m of the side surface are provided at least two places per 1 m, and at a position not more than 3 cm from the ridge line 8 in the side direction on the inner upper surface 6 adjacent to each convex portion. An underfloor heat insulating material provided parallel to a ridgeline.

[0005] The underfloor heat insulating material of the present invention, when both end faces 2 and 2 '(hereinafter referred to as end faces) perpendicular to the side faces are formed so as to be joined with the end face of the immediately adjacent underfloor heat insulating material, the heat insulating property is improved. The construction can be performed rationally without fail. The total length of the convex portions 3 in the horizontal direction is in a range of 1/25 to 1/2 of the total length of the side surface, and the length of each convex portion (horizontal direction) (L ₁ ) are at least 1 cm each, and the width (vertical length) (D ₁ ) is at least 1.
Form to 5 cm. It is desirable that the top of the convex portion 3 is formed by a plane 9 having a vertical length (S ₁ ) of at least 5 mm and perpendicular to the upper surface 6. In addition, slot 4
Is +5 cm where the length (L ₂ ) is the length (L ₁ ) of the convex portion
Or -1 cm, the width (S2) is ₂ to 15 mm,
It is preferable that the depth (D ₂ ) is formed so as to exceed １ ／ of the position of the lower end of the convex portion 3. Further, the width (W _b ) of the lower surface 7 of the underfloor heat insulating material is changed to the upper surface 6 excluding the convex portion 3.
May be diagonally narrowed so as to be 4 to 20 mm smaller than the width (W _u ), or the depression 11 may be provided in the lower surface 7 and / or the upper surface 6 as long as the required heat insulating property is satisfied. As a constituent material, expanded polystyrene is preferably used.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The underfloor heat insulating material of the present invention will be specifically described with reference to the drawings and embodiments.
Each of the drawings shows an embodiment of the underfloor heat insulating material of the present invention, FIG. 1 is a perspective view showing an embodiment of the underfloor heat insulating material of the present invention, and FIG. 2 is a plan view showing an embodiment of the underfloor heat insulating material of the present invention. 3 is a front view, and FIG. 4 is a side view. FIG. 5 is a plan view showing an embodiment of a joint portion, and FIG. 6 is a sectional view showing an embodiment in which the width of the lower surface is smaller than the width of the upper surface.

[0007] The material used for the underfloor heat insulating material 3 of the present invention is an organic material as long as it can be processed into a predetermined shape, is light and has appropriate strength and elasticity, and has a high heat insulating property that can be used under the floor for a long time. Any of a material and an inorganic material may be used, and a composite material may be used. For example, organic materials such as polystyrene foam, polyolefin foam and polyurethane foam, and inorganic materials such as calcium silicate foam can be used. Among them, organic synthetic resin foams are easy to use, and among them, bead expanded polystyrene which is economical because it is mostly formed of closed cells and has appropriate elasticity, is easy to mold, has high heat insulating properties, and is suitable.

The underfloor heat insulating material of the present invention is basically in the form of a thick rectangular plate, is fitted between joists, and usually has two or two ends.
´ is mounted and supported by a large scale. In addition, at least the same as the inner width of the joist, the maximum width is generally larger than the inner width of the joist, and the width of the lower surface 7 is smaller than the inner width of the joist. Can be easily inserted between the joists, and the side surface 1 can be brought into close contact with the joists.

In the underfloor heat insulating material of the present invention, first, the side surface 1 in contact with the joist is provided with at least two convex portions 3 per 1 m of the side surface length. The convex portions 3 are preferably arranged at equal intervals. The protrusion height (H ₁ ) of the convex portion 3 from the side surface 1 may be 2 to 10 mm, and preferably 3 to 8 mm. The maximum width of the underfloor heat insulating material including the convex portion 3 should not be smaller than the inner joist method, but is preferably about 4 mm to 2 cm larger. The portion having the maximum width is provided above the upper surface 6 or the side surface 1. The horizontal length (L ₁ ) of the convex portion 3 depends on the number of the convex portions 3, but is preferably 1 cm or more. It is desirable that the total length of the protruding portions 3 is set to fall within the range of 1/25 to 1/2, preferably 1/10 to 1/3 of the total length of the side surface. The length in the up-down direction, that is, the width (D ₁ ) is preferably at least 1.5 cm, and more preferably 2.5 cm or more. Convex part 3
The lower edge is generally formed on a slope 10 which slopes outward from the lower edge toward the upper side. This is because the width of the lower portion is made smaller than the interval between the joists so that the lower joists can be smoothly inserted between the joists. The length of the convex portion 3 in the present invention means a portion where the convex portion 3 substantially adheres to the joist, that is, a substantial horizontal length of the top.

The top of the convex portion 3 has a vertical length (S ₁ ) of at least 5 mm, preferably 1-2 c.
It is desirable to provide a planar portion 9 of m that is perpendicular to the upper surface, that is, parallel to the side of the joist. This is because the heat insulating effect can be enhanced by closely adhering to the joists, and the underfloor insulating material can be effectively supported between the joists for a long time. The left, right and upper edges can also be formed on a slope, but generally the upper edge is formed on the same plane as the upper surface 6 of the underfloor insulation. The shape of the convex portions 3 to be formed does not need to be the same, and particularly, the length of the convex portions formed at both ends may be ２〜 to ／ of the length of the intermediate convex portion. Many. The surface shape of the convex portion 3 is usually rectangular, but is not limited thereto.

Next, in the underfloor heat insulating material of the present invention, at least 3 cm from the side edge 8 of the side surface of the upper surface 6 on the inner side adjacent to each convex portion 3, at least per 1 m of the side length Two long holes 4 are provided parallel to the ridge line 8. In the present invention, the ridge line is the ridge line of the underfloor heat insulating material body not including the convex portion 3 (the convex portion may be a virtual ridge line), and the position of the long hole 4 is the ridge line 8 and the long hole. 4 means the distance A between the edge and the edge near the ridge line 8 of the opening. The mutual positions of the convex portions 3 and the elongated holes 4 may be slightly shifted in the ridge line direction as long as the object of the present invention is not hindered. For example,
In the example shown in FIG. 2, convex portions are provided at both ends, but the position of the long hole 4 is slightly shifted in the ridge line direction. In this case, a configuration as shown in FIG. 5 is also possible, but the outside of the long hole at both ends is easily chipped and maintains sufficient adhesiveness, like the above-mentioned conventional heat insulating plate provided with the split grooves. There is a drawback that can not be.

The length of the convex portion (L ₁ ) +5 cm or −
The length of 1 cm (L ₂₎ also of so as not to impair the thermal insulation effect, the width of the slot 4 (S ₂₎ is preferably kept to the minimum necessary, usually in 2 to 15 mm. The depth (D ₂ )
Although it depends on the ratio of the width in the vertical direction between the flat surface 9 and the inclined surface 10 formed at the top of the convex portion, the position generally exceeds 1/2 of the position of the lower end of the convex portion 3 from the upper surface 6. 2/3
Is preferably exceeded. When the opening area of the long hole 4 is small, it may be penetrated to the lower surface 7 as necessary. It is good to make the long hole 4 and the convex portion 3 correspond one to one,
The present invention is not limited to the one-to-one correspondence, and one long hole is provided for a plurality of convex portions having a comparatively short length (L ₁ ) arranged in a stripe shape and showing a main portion in a plan view in FIG. , Or the reverse (shown in FIG. 8).

By providing the long hole 4, when the under-floor heat insulating material of the present invention is pressed into the space between the joists, the convex portion 3 is formed.
Is pushed inward by stress from the joists and is deformed by creep, and is bent and pushed into the slot 4 as a relief. Therefore, in the above-described conventional heat-insulating flooring in which a continuous groove is provided over the entire length and the side surface is connected to the main body (the main part of the flooring) by only one side of the lower edge, the groove is easily crushed by the pressing force and the long-term However, in the underfloor heat insulating material of the present invention, since the openings parallel to the side surfaces are provided separately, it is necessary to strongly press the convex portion 3 into the long hole 4. Then, as a reaction, the convex portion 3 comes into contact with the joist by strong pressing, and the underfloor heat insulating material can be firmly held for a long period of time. Further, it is easy to select the dimensions of the elongated hole 4 and the convex portion 3 so as to balance the holding power and the workability.

Further, as shown in FIG.
The width (W _b ) of the lower surface 7 is smaller than the inner width (W _n ) between the joists 12, preferably at least about 4 mm, and
4 to 20 m larger than the width (W _u ) of the upper surface 6 excluding the convex portion 3
m, the width (W _u ) of the upper surface 6 is at least the same as the inner method (W _n ) between the joists 12, preferably about 2 to 10 mm.
At the upper part, the adhesion to the joist 12 is improved, and at the lower part, the underfloor heat insulating material 5 can be easily inserted between the joists 12, which is convenient for construction.
If the both end surfaces 2 and 2 'are formed so as to be joined with the end surface of the immediately-below underfloor heat insulating material, construction becomes easy without impairing the heat insulating effect. In the case where a joint is formed, a protruding portion and an elongated hole 4 can be formed in a portion where the hiccup is left. In this case, it is usually good to penetrate the upper slot to be overlapped and communicate with the lower slot.

Since the underfloor heat insulating material of the present invention is not formed integrally with a structural material, it is generally easy to cut at a construction site, and it is easy to perform dimensional adjustments such as jointing at the construction site. Can be. In addition, as long as the required heat insulating performance can be obtained, it is also possible to provide the depression 11 on the lower surface and / or upper surface of the underfloor heat insulating material to save the heat insulating material. In mounting the underfloor heat insulating material of the present invention, the lower surface is inserted between the joists, and a slight pressing force is applied so that the upper surface and the upper surface of the joists coincide with each other. As described above, the convex portion 3 receives a compressive force from the joist side surface, and is partially plastically deformed, and partly elastically deformed, and can be strongly adhered to the joist side surface.

Although the standard underfloor heat insulating material of the present invention has been mainly described above, the irregular underfloor heat insulating material used in the periphery of the floor can be appropriately molded according to the shape of the standard underfloor heat insulating material. , Can be processed. For example, standard underfloor insulation can be cut to size or glued. In addition, the underfloor heat insulating material of the present invention can be provided with a convex portion or a hole that is not limited to the above-described dimensions without impairing the object of the present invention.

[0017]

According to the present invention, the protruding portion of the underfloor heat insulating material of the present invention is provided with a long hole on the inner side, so that it is easy to install and adhere to the joist with a well-balanced pressing force. The heat insulating material can be firmly supported to prevent the central portion from sagging. It has high adhesion to joists and provides a high degree of heat insulation. Since it can be composed only of materials that are easy to process, it is excellent in adjustment workability at the construction site and is economical.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the underfloor heat insulating material of the present invention.

FIG. 2 is a plan view showing an embodiment of the underfloor heat insulating material of the present invention.

FIG. 3 is a front view of the same.

FIG. 4 is a side view of the same.

FIG. 5 is a plan view showing an end face joint portion of the underfloor heat insulating material of the present invention.

FIG. 6 is a sectional view showing an embodiment of the underfloor heat insulating material of the present invention.

FIG. 7 shows an example of a planar shape of a convex portion and a long hole.

FIG. 8 shows another example of the planar shape of the convex portion and the elongated hole.

[Explanation of symbols]

1: Side surface of underfloor insulation 2: End surface of underfloor insulation 3: Convex portion 4: Slotted hole 5: Underfloor insulation 6:
Upper surface 7: Lower surface 8: Ridge line between upper surface and side surface 9: Flat surface formed on top of convex portion 10: Inclined surface forming lower edge of convex portion 11: Indentation 12: Joist

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04B 1/76 E04B 1/80

Claims (8)

(57) [Claims] 1. A rectangular underfloor heat insulating material which is fitted between adjacent joists and is attached to the underside of a floor, wherein the side surfaces (1) (hereinafter referred to as side surfaces) in contact with the joists extend downward. At least two convex portions (3) each having a height (H ₁ ) of 2 to 10 mm and formed by a surface (10) whose edge is inclined outwardly at the top are provided at least two places per 1 m of the side surface length, At least two slots (4) per meter of side length at the inner upper surface (6) close to each convex portion and not more than 3 cm from the side ridge (8), An underfloor insulation material provided in parallel. 2. Both end faces (2, 2 ') (hereinafter referred to as end faces).
The underfloor insulation material according to claim 1, wherein the underfloor insulation material is configured so as to be joined with an end face of the immediately underfloor insulation material. 3. The total length of the convex portions (3) in the horizontal direction is in the range of 1/25 to 1/2 of the total length of the side surface, and the length (horizontal direction) of each convex portion (L ₁ ) ) Is at least 1 each
cm, width (vertical length) (D ₁ ) is at least 1.5
The underfloor heat insulating material according to claim 1 or 2, wherein 4. The top of the convex portion (3) is a surface perpendicular to the upper surface (6) and has a vertical length (S ₁ ) of at least 5
The underfloor insulation according to claim 1, 2 or 3, characterized in that it is formed in a plane (9) of mm. 5. The elongated hole (4) is a length (L ₂₎ the length of the convex portion (L ₁₎ of + 5 cm to -1Cm, width (S ₂₎ is 2 to 15 mm, depth (D ₂ ) is a convex part (3)
The underfloor heat insulating material according to any one of claims 1 to 4, wherein the thickness of the underfloor heat insulating material is more than 1/2 of a distance to a lower end of the floor. 6. A convex portion (3) having a width (W _b ) of a lower surface (7).
The underfloor heat insulating material according to any one of claims 1 to 5, wherein the heat insulating material is formed so as to be obliquely narrowed so as to be smaller by 4 to 20 mm than a width (W _u ) of the upper surface (6) excluding the above. 7. The underfloor insulation according to claim 1, wherein a depression (11) is provided in the lower surface (7) and / or the upper surface (6). 8. The underfloor heat insulating material according to claim 1, wherein the heat insulating material is made of expanded polystyrene.