JP5813332B2 - Thermal insulation board for construction, thermal insulation method, thermal insulation structure and building - Google Patents

Description

  The present invention relates to a heat insulating plate for building installed between floor joists of a building such as a wooden house, a heat insulating method using the heat insulating plate, a heat insulating structure, and a building.

As a wooden house insulation method, a construction insulation plate made of a synthetic resin foam is fitted between floor joists, and a floor base plywood is struck on top of this, and a flooring material is pasted. The building insulation board used in this insulation method is provided with a groove so that it can be fitted between the floor joists without any gaps. By providing the groove, the building heat insulating plate is easily elastically deformed along the direction orthogonal to the groove, and the workability of filling the joists is improved.
Conventionally, as a thermal insulation board provided with a groove, for example, techniques disclosed in Patent Documents 1 to 3 have been proposed.

  Patent Document 1 discloses a first structural member disposed at a distance and a second structural member disposed on the first structural member and disposed in a direction intersecting the first structural member at a distance. A synthetic resin foam heat insulating material fitted between the adjacent second structural members, the heat insulating material being flat and having a substantially rectangular cross section on the upper surface A first movable piece portion that can be elastically deformed over the entire length via a first groove that is provided in parallel with the long edge side and opened on the upper surface side, and is provided on the lower surface in parallel with the long edge side and opened on the lower surface side. A second movable piece portion that is elastically deformable over the entire length via the second groove, and the upper edge of the side end surface of the first movable piece portion is located outward from the lower edge thereof. The side end surface of the second movable piece portion is inclined such that its lower edge is located outward from its upper edge. It is building insulation material, wherein is disclosed that it is the.

  Patent Document 2 shows a floor heat insulating plate fitted between adjacent joists, which has a rectangular plate shape whose upper surface can be in close contact with the lower surface of the floor plate when fitted between joists. Each of the both side edge portions is formed such that the inner edge thereof is connected to the upper surface of the central portion through the water receiving step portion, and the upper surface of the central portion is bounded by a longitudinal central line extending in the joist direction. As shown in the figure, it is an inclined surface of both flows that incline downward toward the water receiving step part, and on both sides of the central part is drained to drain rain water received by the water receiving step part by flowing down the inclined surface. An insulating board for floors is disclosed in which an appropriate number of holes are provided vertically.

  Patent Document 3 discloses a heat insulating plate made of a synthetic resin foam having a rectangular shape as a whole used by being fitted between parallel structural members of a building, and is open to the upper surface side in parallel to at least one side. A split groove is formed, and at least a side surface on the side where the split groove is formed has an inclined surface whose upper edge is located outward from the lower edge, and further communicates with the split groove; A second split groove portion reaching the peripheral side surface of the heat insulating plate is provided, and the second split groove portion has a closed area at a peripheral side surface of the heat insulating plate or an inner portion close to the peripheral side surface. An insulation board is disclosed.

JP-A-10-159203 No. 7-54449 JP 2003-129484 A

The groove provided in the heat insulating board for building is more easily elastically deformed as the groove depth is deeper, and the workability of filling the joists is improved. However, if the groove depth is too deep, the groove portion of the heat insulating board is easily broken. On the other hand, if the groove depth is reduced, cracking is difficult, but elastic deformation is likely to occur, and there is a problem that filling workability to the joists becomes worse.
With regard to the depth of this groove, Patent Document 1 describes that the depth of the groove is preferably approximately ½ of the average thickness of the heat insulating material, and a deep groove having a thickness of approximately 2/3 or more. It is described that cracking occurs in the groove part during conveyance or construction, and the elastic deformation part on both sides is unnecessarily separated.
The floor heat insulating plate disclosed in Patent Document 2 has a problem that the groove is deep and the water drainage hole is provided through the groove in an appropriate number, so that the heat insulating plate is very easy to break along the groove.

  As described above, in the prior art disclosed in Patent Documents 1 to 3, the depth of the groove formed in the heat insulating plate for building is formed at an appropriate depth that is easily elastically deformed and hardly cracks. It was a preferable degree of recognition. However, it has been difficult for conventional heat insulating boards for buildings to form appropriate grooves that have a uniform groove depth in the longitudinal direction, are easily elastically deformed, and are less likely to crack.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the heat insulating board for buildings which is easy to deform | transform elastically, has favorable workability | operativity at the time of fitting between floor joists, and is hard to produce a crack.

  In order to solve the above problems, the present invention is a heat insulating plate made of a synthetic resin foam that is used by being fitted between parallel joists, and has a groove on at least one surface, and the depth of the groove is The building heat insulating plate is characterized in that the center in the groove longitudinal direction is deeper than both ends in the groove longitudinal direction.

  In the building heat insulating plate of the present invention, it is preferable that the depth of the groove gradually increases from both ends in the groove longitudinal direction toward the center in the groove longitudinal direction.

  In the building heat insulating plate of the present invention, the center in the longitudinal direction of the groove may be configured so that the groove penetrates to the back side in the depth direction.

  In the architectural heat insulating plate of the present invention, it is preferable that a drain hole communicating with the groove is provided at least in the center in the groove longitudinal direction.

  The architectural heat insulating plate of the present invention has a rectangular shape in plan view, and a main body upper central portion between a lower portion of a main body fitted between adjacent joists and two grooves arranged in parallel along the longitudinal direction. And the upper side of the main body on both sides of the upper central portion of the main body, and the depth of the groove is preferably deeper in the center in the longitudinal direction than both ends in the longitudinal direction of the heat insulating plate for building.

  The architectural heat insulating plate of the present invention may have a configuration in which both longitudinal ends of the central portion of the main body and the upper portion of the main body protrude from the lower portion of the main body, and a protrusion is provided on the lower surface of the protruding portion.

  The architectural heat insulating plate of the present invention may have a configuration in which a draining edge is provided at the periphery of the drain hole.

  In the heat insulating board for building of the present invention, the surface on which the groove is formed may be provided with a slope surface that becomes lower as it approaches the groove.

  In the present invention, the building heat insulating plate is fitted between the joists placed side by side under the floor of the building in a state where both sides of the groove are pressed and elastically deformed, and the building heat insulating plates are attached between the joists. Provided is a heat insulating method characterized by having a process.

  Moreover, this invention provides the heat insulation structure characterized by having the structure which the said heat insulating board for construction was inserted between the joists arranged in parallel under the floor of the building, and the said heat insulating board for construction was attached between the joists.

  Moreover, this invention provides the building characterized by having the said heat insulation structure.

  The heat insulating board for building of the present invention is provided with a groove on at least one surface, and the depth of the groove is deeper at the center in the groove longitudinal direction than at both ends in the groove longitudinal direction. At both ends in the longitudinal direction of the groove where cracking is likely to occur along the groove at the time of enforcement, it is difficult to crack because the depth of the groove is shallow. Therefore, the workability when fitted between floor joists is good.

It is a top view which shows an example of the heat insulating board for buildings of this invention. It is a bottom view which shows an example of the heat insulating board for buildings of this invention. It is the sectional view on the AA line of FIG. 1 which shows an example of the heat insulating board for buildings of this invention. It is a front view which shows an example of the heat insulating board for buildings of this invention. It is a perspective view which shows an example of the heat insulating board for buildings of this invention. It is the BB sectional view taken on the line of FIG. 1 which shows an example of the heat insulating board for buildings of this invention. It is a side view which shows an example of the heat insulating board for buildings of this invention. It is the C section expanded sectional view of FIG. It is a side view which shows the other example of the heat insulation board for buildings of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The heat insulating board 1 for a building according to the present invention is a heat insulating board made of a synthetic resin foam that is used by being fitted between parallel joists, and is provided with grooves 6 and 6 on one surface. The depth is characterized by being deeper at the center in the groove longitudinal direction than at both ends in the groove longitudinal direction.

  1-8 is a figure which shows an example of the heat insulation board for buildings of this invention. The architectural heat insulating plate 1 in this example has a rectangular shape in plan view, and one of the main surfaces (hereinafter referred to as the upper surface side) is provided with two grooves 6 and 6 along the longitudinal direction. Yes. The heat insulating plate 1 for building is on the lower surface side opposite to the upper surface side, and a lower body portion 2 fitted between adjacent joists at the time of construction, and two grooves 6 and 6 arranged in parallel on the upper surface side. The main body upper center part 3 is between the main body upper center part 3 and the main body upper part parts 4 and 5 on both sides of the main body upper center part 3. As shown in FIG. 3, the depth of the grooves 6 and 6 is deeper at the center in the longitudinal direction than at both ends in the longitudinal direction of the building heat insulating plate 1.

  This building insulation board 1 is formed by foaming a thermoplastic resin such as a polyolefin resin such as a polyethylene resin or a polypropylene resin, a copolymer such as a polystyrene resin, an acrylic resin, a polyester resin, or an ABS resin. Synthetic resin foam moldings (plastic foam) and synthetic resin foam moldings obtained by foaming thermosetting resins such as polyurethane resins and silicone resins can be used. Among them, polystyrene resin foam molding The body-made heat insulating board 1 for construction is preferable. The architectural insulation board 1 made of a polystyrene resin foam molded body can be manufactured by cutting a thick polystyrene resin foam board into a predetermined shape, for example, or by using expandable polystyrene resin particles. The polystyrene resin pre-expanded particles obtained by heating and pre-expanding are filled in a mold having a cavity having a predetermined shape, and the mold is heated to perform in-mold foam molding.

The density and the expansion ratio of the insulating heat insulating plate 1 can be appropriately selected for each resin used in consideration of necessary strength, light weight, stress relaxation performance, and the like. For example, the insulating heat insulating plate made of polystyrene resin foam molded body In the case of 1, the density is preferably in the range of 10 to 50 kg / m ³ (foaming factor 20 to 100 times), and more preferably in the range of density 13 to ³⁰ kg / m ³ (foaming factor 33 to 77 times). .

  The thickness of the building heat insulating plate 1 is preferably 10 mm or more, and more preferably 25 mm or more. If the thickness is less than 10 mm, the heat insulation becomes insufficient, the mechanical strength is lowered, and the film tends to crack. Although the upper limit in particular of the thickness of the heat insulation board 1 for construction is not restrict | limited, From a viewpoint of workability | operativity at the time of heat insulation board filling, it is preferable that it is 500 mm or less, and it is more preferable that it is 300 mm or less.

  Since the size of the heat insulating board 1 for building is used by being fitted between joists arranged in parallel under the floor of the building, the width is preferably in the range of 100 to 900 mm, and is 150 to 450 mm. A range is preferable. Further, the length is preferably in the range of 300 to 3000 mm, and more preferably in the range of 450 to 2000 mm so that the length can be fitted between the pulls fixing the joists.

  The groove 6 provided in the building heat insulating plate 1 is formed so that the center in the longitudinal direction is deepest and the depth gradually decreases toward both ends in the longitudinal direction. Therefore, as shown in FIG. 3, the bottom of the groove 6 is provided with a slope that becomes deeper toward the center in the longitudinal direction. When water flows into the groove 6, the water flows toward the center in the longitudinal direction. It has become.

  The depth of the groove 6 can be 30 to 100% with respect to the thickness of the building heat insulating plate 1 at the deepest portion at the center in the longitudinal direction. That is, the groove 6 may penetrate the lower surface side at the center in the longitudinal direction. The groove depth at the center in the longitudinal direction is more preferably in the range of 70 to 95% with respect to the thickness. Further, the groove depth at both ends in the longitudinal direction is preferably in the range of 20 to 80%, more preferably in the range of 30 to 70% with respect to the thickness. If the groove depth at the center and both ends in the longitudinal direction is within the above range, it is difficult to break at both ends in the longitudinal direction of the groove, which is prone to cracking along the groove at the time of transportation or enforcement, and it is difficult to break because of the shallow groove depth. In addition, the groove becomes deeper at the center portion in the longitudinal direction of the groove where cracks are less likely to occur at the time of enforcement, and it is easy to deform elastically, and the workability when fitted between floor joists becomes good.

  The width of the groove 6 is preferably in the range of 3 to 30 mm, and more preferably in the range of 5 to 15 mm, in order to elastically deform the building heat insulating plate 1 and make it easy to fit between the joists. If the width of the groove 6 is less than the above range, the amount of deformation that elastically deforms the building heat insulating plate 1 is small and difficult to fit between joists. If the width of the groove 6 exceeds the above range, the building heat insulating plate 1 is removed. When elastically deformed, stress concentrates on the groove bottom, and cracking is likely to occur. The bottom shape of the groove 6 is not particularly limited, but is preferably U-shaped or V-shaped.

  The grooves 6 and 6 are provided with drain holes 9 at least at the center in the longitudinal direction, preferably at the center in the longitudinal direction and at a plurality of other locations. The diameter of the drain hole 9 is not particularly limited, but is usually preferably in the range of 3 to 10 mm, and more preferably in the range of 4 to 7 mm. By providing this drain hole 9, when rainwater hits the building insulation board 1 and gets wet before the roof is completed after the building insulation board 1 is fitted between the joists, it enters the groove 6. It is possible to extract water from the bottom side. In this heat insulating board 1 for construction, since the groove 6 is provided with an inclination so as to become deeper from both ends in the longitudinal direction toward the central part, and the drain hole 9 is provided in the central part, the water that has entered the groove 6 is removed. It can be collected smoothly and extracted to the lower surface side.

A draining edge 10 protrudes from the periphery of the drain hole 9 opened on the lower surface side. By providing this draining edge 10, the water extracted through the drain hole 9 can be smoothly discharged to the lower surface side, and water can hardly be left in the drain hole 9.
In this example, the drain hole 9 is provided directly in the groove 6. However, the drain hole 9 only needs to communicate with the groove 6 and can be provided in the vicinity of the groove 6. By providing the drain hole 9 in the vicinity of the groove 6, the crack resistance of the groove 6 can be increased compared to the case of providing the drain hole 9 directly in the groove 6, and a plurality of drain holes 9 are provided. Also, the strength reduction of the groove 6 can be reduced.

  The upper center portion 3 of the main body 1 of the building heat insulating plate 1 is provided with a notch portion 7 at one longitudinal end portion and an overhang portion 8 at the other end portion. When a plurality of the building insulation plates 1 are fitted between the joists, the overhanging portion 8 of another building insulation plate 1 overlaps the notch 7 of the building insulation plate 1 adjacent in the longitudinal direction to close the gap. Insulation performance is improved.

  Protrusions 11 are provided along the longitudinal direction on the lower surface side of both ends in the longitudinal direction of the body upper central portion 3 and the body upper side portions 4 and 5 of the heat insulating plate 1 for building. The protrusion 11 is formed by abutting the upper surface of the large pulling and elastically deforming when the architectural heat insulating plate 1 is fitted between the joists, thereby longitudinally extending the upper central portion 3 and the upper upper portions 4 and 5 of the main body. Both ends in the direction can be filled so that there is no gap with the floor base plywood surface. Further, the bending rigidity in the longitudinal direction of the heat insulating plate can be improved.

  The heat insulating plate 1 for building is provided with grooves 6 and 6 on the upper surface, and the depth of the grooves 6 and 6 is deeper at the center in the longitudinal direction than at both ends in the longitudinal direction. At both ends in the longitudinal direction, where cracks are likely to occur along the groove at the time of enforcement, the groove depth is shallow, making it difficult to crack. Therefore, it is easy to deform and the workability when fitted between floor joists is good.

  The heat insulation method using the heat insulating plate 1 for building is applied to a building such as a wooden house. In general, on the floor of a building, a large drawing is provided in parallel at a predetermined interval, and a plurality of joists are fixed in a direction orthogonal to the large drawing. In order to attach this heat insulating board 1 for building between joists, by compressing both sides in the width direction of the heat insulating board 1 for building and elastically deforming it, it is fitted from the lower body 2 side between adjacent joists, Easy to install. At the place where the joist interval becomes narrower than the predetermined interval at the end of the floor surface, the heat insulating plate is cut at one groove 6 and the main body side portion 5 is removed, so that the other main body side portion 5 is attached while being elastically deformed. You can also. The building insulation board 1 attached between the joists is elastically restored by being released from the compression, and is stably held between the joists by the restoring force. The heat insulating plate 1 for building is attached between joists on the lower surface side of both ends in the longitudinal direction of the upper central portion 3 and the upper body portions 4 and 5 in contact with the upper surface of the large pull. In the same manner, the heat insulating plate 1 for building is attached between the other joists, the heat insulating plate 1 for building is attached to the entire floor, a floor base plywood is struck thereon, and a floor material is further pasted.

The heat insulating structure formed by using this heat insulating method is formed by fitting the heat insulating plate 1 for building between the joists, so that the heat insulating plate 1 for building can be attached without any gap between the joists, and the heat insulating effect can be obtained. An excellent heat insulating structure can be formed.
Further, the heat insulating board 1 for building is difficult to break at both ends, and since the grooves 6 and 6 are deep at the center and are easily elastically deformed, it is not easily damaged and has excellent workability. Therefore, the heat insulating structure using the heat insulating plate for building 1 can be constructed in a short time, and it is difficult to cause a loss of a damaged product and can be constructed at a low cost.
Furthermore, since the insulating heat insulating plate 1 has a slope at the bottom of the grooves 6 and 6 and a water drain hole 9 is provided at the deepest central portion, it is efficient even if rainwater penetrates into the grooves 6 and 6. Water can be drained to the lower surface side.

  FIG. 9 is a side view showing another example of the heat insulating board for building of the present invention. The heat insulating board for building of this example is provided with a sloped surface 12 that becomes lower as it approaches the grooves 6 and 6 on the upper surface where the grooves 6 and 6 are formed. It is configured.

The heat insulating board for building of this example is provided with grooves 6 and 6 on the upper surface in the same manner as the heat insulating board 1 for building, and the depth of the grooves 6 and 6 is longer in the center in the longitudinal direction than at both ends in the longitudinal direction. Because it is deeper, it is difficult to crack at both ends in the longitudinal direction, which is prone to cracking along the groove during transportation and enforcement, because the groove depth is shallow, and it is difficult to crack during transportation and enforcement. Then, the grooves 6 and 6 are deepened, are easily elastically deformed, and workability when fitted between floor joists is improved.
Moreover, since the heat insulating board for building of this example is provided with the inclined surface 12 which becomes lower as it approaches the grooves 6 and 6 on the upper face where the grooves 6 and 6 are formed, the upper face of the heat insulating board for this building. When the rainwater hits and gets wet, the water on the upper surface enters the grooves 6 and 6 along the gradient surface 12 and can be smoothly drained from the grooves 6 and 6 to the lower surface side through the drain hole 9. Wiping work can be reduced.

  The present invention relates to a heat insulating plate for building installed between floor joists of a building such as a wooden house, a heat insulating method using the heat insulating plate, a heat insulating structure, and a building. The building heat insulating plate of the present invention is elastically easily deformable, has good workability when fitted between floor joists, and is less prone to cracking. It is suitable as a heat insulating plate.

  DESCRIPTION OF SYMBOLS 1 ... Thermal insulation board for buildings, 2 ... Lower part of main body, 3 ... Upper center part of main body, 4 ... Upper part of main body, 5 ... Upper part of main body, 6 ... Groove, 7 ... Notch part, 8 ... Overhang part, 9 ... Drain Hole, 10 ... draining edge, 11 ... projection, 12 ... slope.

Claims (8)

It is a heat insulating plate made of a synthetic resin foam used by being fitted between parallel joists,
A groove is provided on at least one surface, and the depth of the groove is deeper at the center in the groove longitudinal direction than at both ends in the groove longitudinal direction.
At least in the center in the longitudinal direction of the groove , a water drainage hole communicating with the groove is provided at a position other than the bottom of the groove and at a position where the crack resistance of the groove is increased . Insulation board.   The architectural heat insulating plate according to claim 1, wherein the depth of the groove gradually increases from both ends in the groove longitudinal direction toward the center in the groove longitudinal direction. The architectural heat insulating plate has a rectangular shape in plan view, a lower part of the main body fitted between adjacent joists, and a central upper part of the main body between two grooves arranged in parallel along the longitudinal direction, consists of a body upper portion on each side of the body central portion, according to claim 1 or 2 depth of the groove is the direction of longitudinal center than longitudinal ends of the building insulation plate is deeper Insulation board for building. The architectural heat insulating plate according to any one of claims 1 to 3 , wherein a draining edge is provided at a peripheral edge of the drain hole . The heat insulating board for buildings according to any one of claims 1 to 4, wherein a slope surface that is lowered as the groove is formed is provided on a surface on which the groove is formed. In the state which pressed the both sides of the groove | channel and elastically deformed the heat insulation board for buildings of any one of Claims 1-5 , it fitted between the joists arranged in parallel under the floor of the building, and between the joists A heat insulation method comprising a step of attaching the heat insulating plate for building. It has the structure which fitted the heat insulating board for construction of any one of Claims 1-5 between joists arranged in parallel under the floor of a building, and attached the said heat insulating board for buildings between joists. Heat insulation structure. A building having the heat insulating structure according to claim 7 .

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