JP2019124018A - Roof thermal insulation plate - Google Patents

Abstract

To inhibit a thermal insulation plate which is installed on a roof, to be corroded due to retention of moisture, thereby achieving a long service life.SOLUTION: A plurality of roof thermal insulation plate 10 laid on the inclined roof is provided with an engaging part 20 which can be engaged with another roof thermal insulation plate 10 adjacent to an inclined direction end face 16, and a relief surface 30 is formed so as to connect a surface 12 and the inclined direction end face 16. The relief surface 30 is formed to have a slope face or a step shape so as to approach a back surface 14 side as it goes from the surface 12 to the inclined direction end face 16.SELECTED DRAWING: Figure 4

Description

  TECHNICAL FIELD The present invention relates to a roof heat insulating board to be laid for the purpose of a roof foundation and the like.

  Conventionally, in wooden buildings and the like, a heat insulating board is applied as a base material of a roof in order to enhance the heat insulation performance between the outdoor and the indoor. For example, as shown in FIG. 6, there is a method of realizing external heat insulation by laying a plurality of heat insulating plates D directly on the rafter Z. Under the present circumstances, an unevenness is formed in the end face (side surface) of heat insulation board D, heat insulation board D is connected by fitting unevenness of adjacent heat insulation board D, and it is made to have high heat insulation performance and airtightness performance ( For example, refer to Patent Document 1). By installing a waterproof sheet B (a roofing or moisture-permeable waterproof paper) on the surface (upper surface) side of the heat insulating plate D, rain water is prevented from infiltrating into the heat insulating plate D.

Unexamined-Japanese-Patent No. 2017-193973

  However, it is difficult to completely apply the waterproof sheet B, or the waterproof sheet is deteriorated with time. As a result, part of the rainwater may infiltrate the insulating plate D gradually. As shown in FIG. 6, the rainwater U1 and U2 that has penetrated into the inside of the heat insulating plate D moves downward along the surface of the heat insulating plate D by its own weight. Between the end faces of the heat insulating plates D adjacent to each other, the water permeability is deteriorated, and the rainwater is held in the fine gap formed at the time of construction, so the rainwaters U3 and U4 easily stay. If left as it is for a long time, there is a problem that the heat insulating plate D is corroded or deteriorated.

  An object of the present invention is to provide a roof heat insulating board which can exhibit sufficient performance over a long period of time in view of such a situation.

  The present invention for achieving the above object is a roof heat insulating board provided with a plurality of sheets for an inclined roof, wherein a surface facing the sky side, a back surface facing the ground side, and a pair of the roof in the inclination direction. An inclined portion forming a side surface, an engaging portion formed on the inclined end surface and capable of being engaged with another roof heat insulating plate adjacent in the inclined direction, and connecting the surface and the inclined direction end surface And a relief surface formed on the roof, wherein the relief surface has a slope or step shape approaching the back surface side from the surface toward the end face in the inclination direction. It is a board.

  In relation to the roof heat insulating plate, the pair of inclined direction end surfaces are a high end surface located on the high position side and a low end surface located on the low position in the state of being laid on the roof The relief surface is formed so as to connect the surface and the end face on the high elevation side.

  The boundary between the escape surface and the end face on the high place side is located higher than the boundary between the escape face and the surface in a state of being laid on the roof in relation to the insulating plate for roof It is characterized by

  In relation to the roof insulating board, the lower end face has an exposed area exposed by the escape surface of the other roof insulating board adjacent to the lower side of the roof. Do.

  In relation to the roof heat insulating plate, the escape surface is extended in a range of one fifth or more of a plate thickness which is a distance between the front surface and the back surface.

  In relation to the roof heat insulating plate, the escape surface is extended in a range of 5 mm or more in a thickness direction which is a distance between the front surface and the back surface.

  A convex portion is formed as the engagement portion on one of the inclined direction end surfaces where the escape surface is continuous in relation to the roof heat insulating plate, and the other inclined end surface is formed as the engagement portion. A recess is formed to be fitted to the protrusion.

  In relation to the roof heat insulating plate, a peripheral surface on the surface side in the convex portion is continuous with the escape surface.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to suppress deterioration by rain water, and it can exhibit the outstanding effect that sufficient thermal insulation performance can be exhibited over a long period of time.

(A) is a cross-sectional view showing a state in which a roof heat insulating board according to an embodiment of the present invention is installed on a roof, and (B) is a perspective view showing a construction state of a roof heat insulating board installed on a roof is there. (A) is the top view which looked at the heat insulation board for the roof from the surface side, It is the side view which developed the side of four sides, (B) is a perspective view expanding and showing corner B in (A) , (C) is an enlarged perspective view showing a corner C in (A), (D) is an enlarged perspective view showing a corner D in (A), (E) is (A) It is the perspective view which expands and shows the corner part E in. It is a top view which shows the aspect which combines several heat insulation boards for roofs. (A) is a side sectional view explaining the function of the heat insulation board for the same roof, (B)-(D) is a sectional view showing the modification of the heat insulation board for the same roof. (A) And (B) is sectional drawing which shows the modification of the heat insulation board for the same roof. It is sectional drawing which shows the conventional heat insulating plate for roofs.

  Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

  <Roof structure>

  FIG. 1A shows a state in which a roof heat insulating plate (hereinafter, heat insulating plate) 10 according to the present embodiment is applied to a roof. The heat insulation board 10 is fixed to the upper surface of the rafter 80 arrange | positioned along the direction of a roof. At the lower end of the rafter 80, a gable plate 84 is provided to prevent wind from entering the attic. In the vicinity of the lower end of the rafter 80, a slip stopper 86 serving as a stopper of the heat insulating plate 10 is fixed. The antislip bar 86 also serves as a base plate for fixing the blast plate 84.

  The rafter 80 is fixed to a pillar 70 extending in the vertical direction and a purlin 78 suspended horizontally (in the winding direction) in the vicinity of the upper end of the pillar 70. The structural surface material 72, the waterproof sheet 74, the outer wall material 76 (which may be a heat insulating plate), and the like are fixed to the outside of the column 70.

  In addition, although the case where the heat insulation board 10 is directly fixed to the upper surface of the rafter 80 is illustrated here, a foundation board may be laid on the upper surface of the rafter 80, and the heat insulation board 10 may be constructed on it. .

  A waterproof sheet 60 is placed on the surface (upper surface) of the heat insulating plate 10. Although this waterproofing sheet 60 is representative of roofing and moisture-permeable waterproof paper, other sheet materials can also be used.

  A fixed cylinder rim 62 is provided on the waterproof sheet 60. The fixed barrel edge 62 extends in an inclined direction along the upper side of the rafter 80, as shown in FIG. 1B, and cooperates with the rafter 80 to fix the heat insulating plate 10 so as to sandwich it. . In addition, in FIG. 1 (B), illustration of waterproof sheet 74 grade | etc., Is abbreviate | omitted for convenience of explanation.

  Referring back to FIG. 1A, the grate 64 is horizontally fixed on the fixed cylinder edge 62. A tile 66 is installed on the tile 64. An eaves 68 is installed at the lower end of the fixed barrel edge 62 in the inclination direction so as to be sandwiched with the tile 64.

  The heat insulation board 10 becomes a structural material obtained by press-molding a wooden fiber. The heat insulating plate 10 is more resistant to fire than petroleum-based ones, and is less likely to burn at the time of fire, so the progress of the fire can be delayed. In addition, because it does not emit toxic gas when burning, safety for people and the environment can be realized.

  <Insulating plate structure>

  As shown in FIG. 2 and FIG. 4 (A), the heat insulating plate 10 is a plate material which becomes a square (here, a rectangle) in a plan view, the inclination direction K of the roof becomes a short side, and the horizontal direction of the roof ( Direction of winding) H is the long side.

  The heat insulating plate 10 has a surface 12 facing the sky side, a back surface 14 facing the ground side, a pair of inclined direction end faces 16 forming side surfaces at both ends in the inclination direction K, and a pair forming side surfaces at both ends in the horizontal direction H The horizontal end face 18 of the Here, among the pair of inclined direction end surfaces 16, when laying the roof, the one located on the high side in the inclined direction is the high end face 16A, and the one located on the low side is the low end face 16B Define.

  The inclined direction end face 16 is formed with an engaging portion 20 which can be engaged with another heat insulating plate 10 adjacent in the inclined direction K.

  Specifically, the engaging portion 20 has a convex portion 22 formed on the side of the high end face 16A and a concave portion 24 formed on the low end face 16B. The convex part 22 of the other adjacent heat insulation board 10 is inserted in the recessed part 24, and it mutually fits. The protrusions 22 form line-like (peak-like) protrusions extending in the horizontal direction H at the height side end face 16A. The recess 24 is a groove extending in the horizontal direction H at the lower end surface 16B.

  As shown to FIG. 4 (A), the cross-sectional shape of the convex part 22 and the recessed part 24 becomes the same shape. Specifically, the cross-sectional shape of the convex portion 22 is a tapered shape in which the distal end is thinner and the proximal end is thicker. Therefore, the outer peripheral surface (outer wall) 22A on the front surface 12 side and the outer peripheral surface (outer wall) 22B on the back surface 14 side are formed in the convex portion 22. On the other hand, in the recess 24, an inner peripheral surface (inner wall) 24A on the front surface 12 side and an inner peripheral surface (inner wall) 24B on the rear surface 14 side are formed. Further, the convex portion 22 is disposed at a position separated from the virtual extension plane X of the surface 12 by the distance S in the thickness direction. Specifically, the convex portion 22 is separated from the virtual extension plane X by more than one-fifth of the total plate thickness T. Desirably, they are separated by more than a quarter of the total thickness T. For example, when the total plate thickness is 30 mm, it is preferable that the distance from the surface 12 in the thickness direction is 6 mm or more, more preferably 7.5 mm or more. Regardless of the total plate thickness T, it is preferable that the protrusion 22 be separated by 5 mm or more from the virtual extension plane X in the plate thickness direction.

  Returning to FIG. 2, the heat insulating plate 10 has a relief surface 30 formed to connect the surface 12 and the elevation side end face 16A. The relief surface 30 extends in a band along the horizontal direction H.

  As shown in FIGS. 2 (B) and 2 (E), the relief surface 30 approaches the back surface 14 (i.e., separates from the surface 12 in the thickness direction) from the surface 12 toward the elevation end surface 16A. It becomes a slope shape. The term "inclination" means having a predetermined angle with respect to the plane of the surface 12. In addition, as shown to FIG. 4 (A), it is preferable that inclination-angle (alpha) of the relief surface 30 on the basis of the surface 12 (virtual extension plane X) is set to 45 degrees or less, More preferably, it is 30 degrees or less Set to

  The height-side end face 16 </ b> A is a region with high rigidity (high strength) because the convex portion 22 is formed. Although the height near the end face 16A becomes thin due to the escape surface 30, the height end face 16A is originally high in strength, so that the strength reduction due to the escape surface 30 can be compensated. In addition, since the concave portion 24 is formed on the lower end surface 16B, the area becomes low (low strength) in rigidity. Therefore, when the surface equivalent to the escape surface 30 is temporarily formed, attention to the strength surface is taken into consideration. It takes

  Furthermore, the escape surface 30 extends in a range of one fifth or more of the total plate thickness T, which is the distance between the front surface 12 and the back surface 14 (see distance S in FIG. 4A). Desirably, it extends in the range of 1/4 or more of the total plate thickness T. For example, when the total plate thickness is 30 mm, it extends in the range of 6 mm or more from the surface 12 in the plate thickness direction, desirably extends in the range of 7.5 mm or more. Regardless of the total plate thickness T, the escape surface 30 preferably extends in the same plate thickness direction to a range of 5 mm or more. Although the details will be described later, as the range (distance S) of the relief surface 30 is wider, the lower end surface 16B of the opposing heat insulating plate 10 is easier to dry.

  Further, as shown in FIGS. 2B and 2E, the relief surface 30 is continuous with the outer peripheral surface (outer wall) 22A of the convex portion 22. In particular, in the present embodiment, the angle of the relief surface 30 and the angle of the outer peripheral surface (outer wall) 22A completely coincide with each other, and are configured to be a single plane. In this way, as shown in FIG. 4A, the rainwater U4 that has permeated in the vicinity of the outer peripheral surface 22A of the convex portion 22 easily moves to the lower side through the escape surface 30.

  Furthermore, as shown in FIG. 4A, an exposed region R exposed by the escape surface 30 of the other heat insulating plate 10 adjacent to the lower side in the roof installation state is secured on the lower side end face 16B. . Specifically, the exposed region R is an end surface region continuous from the opening edge of the recess 22 toward the surface 12 side. Rainwater U3 moving and staying along the surface 12 of the heat insulating plate 10 in the inclination direction K is vaporized to the external space through the exposed region R of the low end face 16B. As a result, the lower end face 16B can be always kept in a dry state, and the corrosion and deterioration of the heat insulating plate 10 can be suppressed.

  Further, in the state of being laid on the roof, the boundary P1 between the escape surface 30 and the elevation side end face 16A (here, the boundary between the outer peripheral surface 22A of the convex portion 22) is compared with the boundary P2 of the escape surface 30 and the surface 12 It is located on the height side. That is, in the roof laying state, the angle β based on the horizontal plane L in the relief surface 30 is the same as the inclination direction of the roof, and is an inclination slightly smaller than the roof. In this way, the rainwater U4 that has permeated the relief surface 30 can easily move to the lower side along the slope of the relief surface 30.

  Returning to FIG. 2, lateral engagement portions 40 are formed on the pair of horizontal end faces 18. Specifically, the side engagement portion 40 has a side convex portion 42 formed on one horizontal end face 18 and a side concave portion 44 formed on the other horizontal end face 18. The side convex part 42 of the other adjacent heat insulation board 10 is inserted in the side concave part 44, and it mutually fits. The cross-sectional shapes of the side convex portion 42 and the side concave portion 44 are the same. Specifically, the cross-sectional shape of the side convex portion 42 is a tapered shape that is thinner at the tip end and thicker at the base end side. In addition, as shown to FIG. 2 (B), the convex part 22 and the side convex part 42 are mutually connected in the corner part. Similarly, as shown in FIG. 2D, the recesses 24 and the side recesses 44 are also connected to each other at the corners.

  In FIG. 3, the aspect which connects the several heat insulation board 10 to the inclination direction K and the horizontal direction H is shown. The plurality of heat insulating plates 10 connected in the horizontal direction H are connected to each other by using the side engaging portions 40. The plurality of heat insulating plates 10 connected in the inclination direction K are connected to each other by using the engaging portion 20.

  According to the heat insulating plate 10 of the present embodiment, as shown in FIG. 4A, in order to form the exposed region R on the low position side end face 16B of the heat insulating plate 10 on the high position side, the heat insulating plate at the low position A relief surface 30 is formed at 10. As a result, it becomes possible to always keep the low end face 16B of the heat insulation plate 10 on the high place dry. As a result, the life extension of the heat insulating plate 10 is achieved. In particular, the rainwater U1 to U3 permeating from the surface 12 is likely to be retained by its own weight in the low end face 16B, but according to the present embodiment, the rain water U1 to U3 is taken as the low end face 16B (exposed area R Can be released (vaporized) from the

  Furthermore, since the escape surface 30 itself is inclined in the same direction as the inclination direction K of the roof, rainwater U4 that has penetrated the surface of the escape surface 30 is also easy to move to the lower side along the surface 12, Can also be released (vaporized) to the outside. In particular, in the present embodiment, the escape surface 30 extends from the surface 12 to a range of one-fifth or more or a range of 5 mm or more in the plate thickness direction, so that the area of the exposed region R becomes large. Can be enhanced. Furthermore, the escape surface 30 and the outer peripheral surface (outer wall) 22A of the convex portion 22 are continuous, and there is no step difference at the boundary P1. As a result, the retention of water on the boundary P1 between the relief surface 30 and the projection 22 is suppressed, and the corrosion in the vicinity of the base end of the projection 22 can also be suppressed.

  <Modification of heat insulation plate>

  As in the heat insulating plate 10 shown in FIG. 4 (B), a small protrusion having a triangular cross section may be formed at the end of the protrusion 22. Similarly, on the bottom of the recess 24, a small recess having a cross-sectional triangle or more may be formed.

  Like the heat insulation board 10 shown to FIG. 4C, you may provide a step-like level | step difference between the escape surface 30 and the surface 12. As shown in FIG. In this case, the surface direction of the relief surface 30 may be parallel to the surface 12.

  As in the heat insulating plate 10 shown in FIG. 4D, the exposed region R of the low end face 16 opposite to the escape surface 30 may be an inclined surface similar to the escape surface.

  Like the heat insulation board 10 shown to FIG. 5 (A), you may form the convex part 22 in the low place side end surface 16B, and may form the recessed part 24 in the high place side end surface 16A. That is, it is also possible to invert the relationship between the unevenness on the high side and the low side. Under the present circumstances, it is preferable to make the escape surface 30 formed in the height side end surface 16A continue with the opening edge of the recessed part 24. As shown in FIG.

  As a modification of the heat insulating plate 10 of FIG. 5 (A), like the heat insulating plate 10 shown in FIG. 5 (B), the exposed region R of the lower end face 16 opposite to the relief surface 30 is inclined similarly to the release surface. It is good also as a face.

  In addition, the heat insulation board of this invention is not limited to above-described embodiment, Of course in the range which does not deviate from the summary of this invention, a various change can be added.

DESCRIPTION OF SYMBOLS 10 roof heat insulation board 12 surface 14 back surface 16A height side end face 16B low side end face 18 horizontal end face 20 engagement part 22 convex part 22 recessed part 22A, 22B outer peripheral surface 24 recessed part 24A, 24B inner peripheral surface 30 relief surface 40 side One side engaging part 42 Side convex part 44 Side concave part 60 Tarpaulin 62 Fixing body rim 64 Rub 66 Rub 68 Eaves 70 Pillar 72 Structural facing 74 74 Tarpaulin 76 Outer wall material 78 Pulling 80 80 Rafter 84

Claims (8)

A roof insulation board which is laid on a plurality of sloped roofs,
The surface facing the sky side,
The back side facing the ground side,
Inclined end faces constituting a pair of side surfaces in the inclining direction of the roof;
An engagement portion which is formed on the end surface in the inclination direction and can be engaged with another roof heat insulating plate adjacent in the inclination direction;
And a relief surface formed to connect the surface and the inclined direction end surface,
The roof heat insulating plate, wherein the escape surface has a slope or a step shape approaching the back surface side from the surface toward the end surface in the inclination direction. The pair of inclined direction end surfaces are a high end surface located on the high position side and a low position end surface located on the low position in the state of being laid on the roof,
The escape surface is formed so as to connect the surface and the high end face.
A roof heat insulating board according to claim 1. In the state of being laid on the roof, the boundary between the escape surface and the end face on the height side is located higher than the boundary between the escape surface and the surface,
The heat insulation board for roofs of Claim 2. The lower end face has an exposed area exposed by the escape surface of another roof insulating board adjacent to the lower side of the roof.
The heat insulation board for roofs of Claim 2 or 3. The escape surface extends in a range of 1⁄5 or more of a plate thickness which is a distance between the front surface and the back surface,
The heat insulation board for roofs in any one of Claims 1-4. The escape surface extends in a range of 5 mm or more in a thickness direction which is a distance between the front surface and the back surface.
The heat insulating board for roofs according to any one of claims 1 to 6. A convex portion is formed as the engaging portion on one of the inclined direction end surfaces where the escape surfaces are continuous, and a concave portion is formed on the other inclined direction end surface to be fitted with the convex portion as the engaging portion. It is characterized by
The heat insulating board for roofs according to any one of claims 1 to 6. The peripheral surface on the surface side in the convex portion is continuous with the escape surface,
The heat insulation board for roofs of Claim 7.

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