JP2011063982A - Exterior wall heat insulation board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exterior wall heat insulation board which facilitates finishing of an exterior wall. <P>SOLUTION: The exterior wall heat insulation board has a plurality of screw driving recesses 14 formed on one side surface of a substantially rectangular foamed resin board 11 horizontally symmetrical, and also has a waterproofing coating layer formed on the surface of the foamed resin board 11 and the inner surface of the recesses 14. Provision of the screw driving recesses 14 facilitates location of fixing positions and also provision of the coating layer enhances adhesion property with coating, mortar and exterior tiles. Enhancement of the heat insulation property of the exterior wall helps to prevent separation of a flat exterior tile from the exterior wall over a long period which used to be difficult heretofore, even when the flat exterior tiles having no unevenness on the rear surface are adhered on the wall and disposed as they are. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an outer wall heat insulation board used for an outer wall of a building.

  In recent years, wooden buildings are often provided with a heat insulating material on the outer wall of the building for the purpose of improving air conditioning efficiency and preventing dew condensation indoors and outdoors.

  However, in concrete buildings (so-called buildings), exterior materials (decorative materials), especially decorative tiles are often attached to the outer walls. Conventionally, it has been pointed out that cosmetic materials in concrete buildings have been peeled off due to deterioration over time, and it is a fact that regular exterior repair work is indispensable.

  Conventionally, some proposals have been made to prevent peeling of exterior materials (such as outer wall tiles) of buildings. For example, as shown in FIG. 4, there is a type using a special tile 1 having irregularities on the back surface (Patent Document 1). This is to prevent the peeling by making the bonding state with the heat insulating material 2 good by the unevenness of the back surface of the special tile 1. 3 is a mortar, 4 is an anchor member driven into the mortar 3, and 5 is a concrete frame.

  The peeling of the outer wall tile is considered to be mainly caused by condensation on the back surface of the outer wall tile. Therefore, sticking the special tile 1 with unevenness to the heat insulating material 2 has an excellent effect in terms of the peeling prevention function. To do. If the heat insulating material 2 prevents condensation outside the house and the back surface unevenness of the special tile 1 makes the fitting state with the heat insulating material 2 good, the aging of the adhesive (such as mortar) used on the back surface of the special tile 1 This is because deterioration can also be prevented.

  Note that there are some proposals for forming a ventilation layer on the outer wall only to prevent condensation on the back surface of the exterior material such as the outer wall tile (for example, Patent Documents 2 and 3).

JP2003-027698 JP 2006-169892 JP2002-294893

  The problem is that the work efficiency is poor and the cost for preventing the outer wall tiles from peeling off increases. This is as follows.

  First, special tiles with irregularities on the back surface are expensive to manufacture compared to versatile outer wall tiles with a smooth back surface. Moreover, in order to stick such a special tile to a heat insulating material, since it is necessary to shape | mold an unevenness | corrugation also to a heat insulating material, the manufacturing cost of a heat insulating material will also increase.

  Secondly, when special tiles having irregularities on the back surface are used, there is a problem of position adjustment at the opening portion of the outer wall (window frame opening or the like) and the corner portion (corner portion) of the outer wall. This is because if the irregularities of the outer wall tile are not sufficiently fitted with the irregularities of the heat insulating material at the opening or corner, the risk of the outer wall tile peeling off increases.

  The outer wall tiles with irregularities on the back are also standard products to reduce costs, but the outer wall dimensions of the building vary from site to site. For this reason, a high level of skill is required in order to realize a beautiful uneven fitting at the opening and corner. In order to perform construction that sufficiently satisfies the intended purpose, construction by a skilled engineer is necessary, and the work cost commensurate with it is a condition.

  In addition, in anticipation of dimensional constraints (badness), it is difficult for inexperienced people to arrange special tiles with irregularities neatly, which may cause delays in the construction period. There is also a problem that the outer wall construction is terminated only by appearance, with an insufficiently uneven fitting that is worried about the delay in the construction period.

  In the structure (Patent Documents 2 and 3) in which a ventilation layer is provided on the outer wall, it is difficult to fix the exterior material (decorative material) in close contact with the heat insulating material, so a plate material is provided via a base material such as a square material. This is inevitably generated in a structure in which an exterior material is stuck thereon. The ventilation layer on the outer wall is not necessarily a necessary structure for a building, although it is for preventing condensation.

  Then, the objective of this invention is providing the outer wall heat insulation board which can perform the cosmetic finish of an outer wall more easily.

  In order to achieve the above-mentioned object and to solve the problem, the outer wall heat insulation board according to the present invention is provided with a plurality of screw-in recesses symmetrically on one side surface of a substantially rectangular foamed resin plate and foamed. A waterproof coating layer is provided on the surface of the resin plate and the inner surface of the recess (Claim 1).

  By providing a plurality of screw driving recesses symmetrically, even an unskilled operator can easily fix the outer wall heat insulating board to the housing. In addition, by providing a waterproof coating layer (coating layer) on the entire surface including the recesses, it is possible to easily attach the exterior material via various adhesives.

  The coating layer has a two-layer structure, the inner layer is an asphalt layer obtained by applying and drying asphalt diluted with petroleum, and the outer layer may be a coating layer mainly composed of an acrylic resin. ).

  The inner layer asphalt layer has very good adhesion to the foamed resin (for example, polystyrene foam), and also has good adhesion to the outer layer resin coating layer. For this reason, even if the exterior material is attached (directly attached) to the surface of the resin coating layer of the outer layer via an adhesive, the exterior material has a structure that is extremely difficult to peel off. Condensation is unlikely to occur on the back surface, so there is little risk of deterioration over time.

  The coating layer has a single-layer structure, and the main raw material of this coating layer is a mixture of an acrylic resin-based base material, an inorganic hydraulic curing agent containing cement powder, and asphalt powder. The blending ratio of the body may be 10 to 30% of the total weight by weight (Claim 3).

  When the coating layer has a single-layer structure, there is an advantage that the manufacturing process for applying and drying the coating layer can be simplified as compared with the two-layer structure.

  According to the outer wall heat insulating board according to the present invention, even if the exterior material is directly attached to the foamed resin plate, the adhesiveness with the adhesive on the back surface of the exterior material can be kept good, so that the exterior material can be peeled off over a long period of time. Can be suppressed. Since the back surface of the exterior material may be smooth, the construction cost (component cost) can be reduced. Since the exterior material can be directly attached to the foamed resin plate, condensation on the outer wall can be prevented without providing a ventilation layer on the outer wall. The waterproof coating layer has good compatibility with paints and mortars.

  1 and 2 show an embodiment of an outer wall heat insulation board according to the present invention. The outer wall heat insulating board 10 uses a foamed resin plate having a substantially rectangular plane, such as a polystyrene foam plate or a foamed styrene plate. Hereinafter, a description will be given by taking the foamed polystyrene plate 11 as an example. A plurality of screw-driving recesses 14 are provided on one surface of the foamed polystyrene plate 11 symmetrically, and the surface of the foamed polystyrene plate and the inner surface of the recess 14 are waterproof. A coating layer 20 is provided.

  As the expanded polystyrene plate 11, it is desirable to use a flame-retardant material made of so-called extruded polystyrene (XPS), such as Styrofoam (registered trademark). Even if it is made of expanded polystyrene (EPS), it can be used as the expanded polystyrene plate according to the present invention if a flame retardant is added to the raw material.

  The foamed polystyrene plate 11 is standardized to some extent in consideration of transportability, workability, etc. from the properties as a building material. For example, the thing for building materials marketed as a dimension standard of length 1820mm, width 910mm, and thickness (W) 50mm can be used.

  The concave portion 14 is used to fix the foamed polystyrene plate 11 to the housing by driving a screw into the portion. At this time, by forming the concave portion 14, the screw head (head) does not protrude from the surface of the foamed polystyrene plate 11 (so as not to be uneven), and the screw head is placed inside the concave portion 14. The surface of the expanded polystyrene plate 11 can be processed smoothly (planar). Further, the presence of the recess 14 makes it easy to determine the screw driving position, so that even a person with little work experience can definitely drive the required number of fixing screws into an appropriate location.

  The shape of the recess 14 does not matter. This is because it is only necessary to be able to suggest to the operator the location where the screw is driven and the number of screws.

  Preferably, the diameter of the opening on the surface side of the expanded polystyrene plate 11 is increased, the diameter is shrunk toward the inside, and a mark (positioning mark) for driving a screw into the center of the bottom surface is present. Since the screw is a member having a relatively thin leg length, it is not necessary to set the inner diameter of the recess 14 to be excessively large. However, by increasing the diameter of the opening on the front side, there is an advantage that the screwing operation becomes easy. The planar shape may be a polygon.

  More specifically, the recess 14 is substantially frustoconical (see FIG. 2). If it has a substantially frustoconical shape, the diameter of the opening on the front side of the expanded polystyrene plate 11 is a large circle, and the circular passing diameter shrinks toward the inside, so a screw (concrete bolt, etc.) is driven into the center of the bottom surface. easy. In addition, formation of the recessed part 14 should just press the metal metal mold | die heated to high temperature on the surface of the polystyrene foam board 11. FIG.

  In this case, as a more desirable shape, the screw driving mark provided at the center of the bottom surface is a recessed hole. The mark may be a sealant or paint, but if a recessed hole Q is provided, inserting the tip of the screw into the hole Q does not cause a displacement of the driving location. This is because the screw can be driven into the housing. Inadvertent misalignment can also be prevented.

  The magnitude | size of the recessed part 14 can be set suitably. Specifically, for example, the differential diameter (W1) of the opening is 40 mm, the differential diameter (W2) of the bottom surface is 35 mm, the depth (W3) is 10 mm, and the differential diameter of the recessed hole Q is 10 mm. The depth (depth) of the recessed hole Q is 10 mm. This number is not absolute. It is desirable to set at least a vertical fluctuation (a positive numerical value or a negative numerical value) of about 30%.

  It is desirable to provide three or four recesses 14 symmetrically in the left-right direction. The number in the vertical direction can be determined in consideration of the weight of the exterior material. Moreover, when applying to a wooden building, the separation distance of the left-right direction of the recessed part 14 is set according to the dimension between pillars so that a screwing position may be easily set to an appropriate position between pillars.

  The coating layer 20 preferably has a two-layer structure. In this case, the inner layer (first layer) is an asphalt layer 22 obtained by applying and drying asphalt diluted with petroleum, and the outer layer (second layer) provided on the surface is mainly made of resin, particularly acrylic resin. This is a coating layer 24.

  The asphalt layer 22 used for the inner layer and the coating layer 24 mainly composed of acrylic resin used for the outer layer may be thin. For example, the thickness is about 0.5 to 4 mm. In addition, any layer can be provided by means such as roller coating or air spray coating.

  The asphalt layer 22 plays a role of improving the adhesion with the polystyrene foam plate 11. When the coating layer 24 mainly composed of an acrylic resin is provided on the surface of the asphalt layer 22, the adhesion between the asphalt layer 22 and the coating layer 24 mainly composed of an acrylic resin is very good. It is possible to ensure high adhesion performance of exterior materials (external wall tiles, etc.) that are adhered to the outside of the coating layer 24.

  Since the raw material asphalt used for the asphalt layer 22 has high viscosity, it is often not suitable for application to the polystyrene foam plate 11 in a general state of availability. Therefore, in the present invention, the raw material asphalt having high viscosity is diluted with petroleum and applied. This is because asphalt can be reduced in viscosity by petroleum.

  If petroleum is used, asphalt can be diluted to an appropriate concentration. However, in terms of production cost, it is desirable to use petroleum that is relatively easily available and low in price. An example of petroleum (liquid) that satisfies such conditions is kerosene. Kerosene is readily available and affordable, and is an excellent diluent for adjusting the viscosity of asphalt to an appropriate concentration. The raw material asphalt may be used with its viscosity lowered to such an extent that the application work using the application roller is easy.

  As the coating film layer 24 mainly composed of an acrylic resin, various waterproof coating materials that are applied to buildings such as outer walls are commercially available. As the waterproof coating material used in the present invention, it is only necessary to guarantee the waterproof performance. For example, it is possible to use an acrylic resin-based waterproof coating material that is commercially available from E-Tech Co., Ltd. and that combines a trade name AE Coat A (acrylic main ingredient) and a trade name AE Coat B (inorganic hydraulic powder). . Since there are many products of acrylic resin-based waterproofing material, it can be used regardless of the manufacturer or sales manufacturer of the product as long as the waterproof function is guaranteed.

  Therefore, according to the outer wall heat insulating board 10 according to this embodiment, the asphalt layer 22 diluted with petroleum (kerosene or the like) is provided as the inner layer, and the outer layer is provided with the coating layer 24 mainly composed of acrylic resin. It becomes possible to guarantee the adhesive strength of the exterior material adhered to the surface of the film layer 24 to be very high. This is because the asphalt layer 22 is excellent in adhesiveness with the foamed polystyrene board 11 and also has good adhesive compatibility with the coating layer 24 mainly composed of acrylic resin.

  The asphalt layer 22 only needs to be diluted with petroleum (kerosene or the like) and then applied with a roller or a brush after the asphalt layer 22 is diluted. Therefore, even in the case of small-scale production, the manufacturing cost can be kept low.

  In addition, since the outer wall heat insulating board 10 is provided with a plurality of left and right recesses 14 for screw driving, even an unskilled worker can easily fix the outer wall heat insulating board to the housing.

  The outer wall heat insulating board 10 according to the present invention is not limited to that of the above embodiment.

  For example, a waterproof coating layer (not shown) can have a single layer structure.

  In this case, the main raw material of the coating layer is a mixture of an acrylic resin main agent, an inorganic hydraulic curing agent containing cement powder, and asphalt powder, and the mixing ratio of the asphalt powder is The weight ratio is 10 to 30% of the total weight.

  Instead of providing the asphalt layer 22 in the above-described embodiment, such a single-layer coating layer is a resin-based waterproof coating material (an inorganic hydraulic curing agent containing an acrylic resin-based main agent and cement powder). A mixture obtained by mixing asphalt powder with the mixture is applied to the surface of the foamed polystyrene plate 11 and dried.

  Since the coating layer has a single layer structure, the application / drying treatment of the inner layer (asphalt layer 22) provided in the case of a double structure can be omitted, which is suitable for mass production.

  However, since another work process for obtaining the asphalt powder to be mixed with the resin-based waterproof coating material is required, in the case of small-scale production, there is a possibility that it is rather expensive. Asphalt powder can be obtained by freezing and crushing raw asphalt without diluting the raw material asphalt, and the processing process itself is simple and easy. Considering the time and cost required, it is economically difficult to implement a one-layer coating layer using asphalt powder unless a certain number of productions can be expected regularly.

  However, the adhesion strength between the asphalt and the polystyrene foam plate 11 can be ensured even with a single layer structure in which asphalt powder is mixed with the resin waterproof coating material. Accordingly, when the number of products produced is large, there are cases where it is economically advantageous to form a waterproof coating layer having a single layer structure. There is no functional problem (adhesive strength of the exterior material) even with a single layer structure.

  In the case of a single-layer structure, the blending ratio of the asphalt powder to the resin-based waterproof coating material is 10 to 30% of the total weight by weight ratio. This is because if there is a blending amount of this level of asphalt powder, there is a considerable amount of asphalt powder on the surface of the foamed polystyrene plate 11, and good adhesion between the foamed polystyrene plate 11 and the asphalt powder can be ensured.

  The planar shape of the recess 14 provided in the outer wall heat insulation board 10 according to the present invention is not limited to a circle, and may be a polygon such as a quadrangle.

  The waterproof coating layer is provided on the entire surface of one side of the foamed polystyrene plate 11 (the side on which the concave portion 14 is provided; the side that becomes the surface when disposed). This is to improve the adhesion of the exterior material. It is not necessary to provide a coating layer on the back surface. Although it is not necessary to provide a coating layer on the upper, lower, left and right side surfaces, it is desirable to provide a coating layer on the upper, lower, left and right side surfaces from the viewpoint of the product. In addition, the waterproofness can be maintained higher by doing so.

  As shown in FIG. 3, when attaching the outer wall heat insulation board 10 to an outer wall, it is desirable to provide a clearance (22) vertically and horizontally. For example, a screw (such as a concrete screw or a metal screw, which will be described later) can be used to arrange and fix the outer wall heat insulating board 10. After fixing the outer wall insulating board 10, the gap (32) on the upper, lower, left and right sides of the outer wall insulating board 10 is filled (injected) with a heat insulating resin material, for example, a room temperature curable urethane resin material 32, to fill the gap. . It is desirable that the outer surface of the urethane resin material 32 and the outer surface of the outer wall heat insulation board 10 are substantially flat (so-called flush; solitary).

  When fixing the outer wall heat insulating board 10, it is desirable to use an effective adhesive on the concrete or mortar surface (in combination with a fixing bracket). As an effective adhesive for the concrete or mortar surface, for example, a recycled rubber solvent type adhesive, trade name “Bond G2002” (registered trademark; Konishi Co., Ltd.) can be used. In the case of renovation of the outer wall of the building, the outer wall heat insulation board 10 can be pasted after repairing the damaged part of the old tile. The outer wall insulating board 10 may be pasted after the old tiles are peeled off.

  After the fixing bracket is driven into the outer wall of the housing, the recess 14 is filled with a urethane resin material (injection of urethane foam or the like) to fill the gap in the recess 14. It is desirable that the exposed surface of the urethane resin material filling the recess 14 and the surface of the outer wall heat insulating board 10 be so-called flush. After the urethane resin material filled in the gaps (32) and the recesses 14 is cured, if the waterproof coating material is applied to the surfaces and cured, the waterproof coating resin in which the entire surface of the outer wall base is excellent in adhesiveness Covered by. Good compatibility with paints.

  Thus, if the outer wall heat insulation board 10 is disposed on the outer wall of the housing, a normal outer wall tile having no irregularities on the back surface can be easily attached to the outside. Further, the final exterior wall can be finished by applying the coating material as it is on the surface of the outer wall base material (such as the heat insulating board 10).

  Of course, the foamed resin plate is not limited to a polystyrene foam plate, and may be a foamed styrene plate.

It is a figure which illustrates the outer wall heat insulation board concerning an embodiment from the front. It is a fragmentary sectional view which illustrates the crevice of the outer wall heat insulation board concerning an embodiment. It is a figure which shows the example of arrangement | positioning of the outer wall heat insulation board which concerns on embodiment. It is a figure which illustrates the conventional outer wall heat insulating material.

DESCRIPTION OF SYMBOLS 10 Outer wall insulation board 11 Styrofoam board 14 Recessed part 20 Coating layer 22 Asphalt layer (coating layer)
24 Coating layer (coating layer)
Q hole

Claims (3)

On the one side surface of the foamed resin plate having a substantially rectangular shape, a plurality of concave portions for screw driving are provided symmetrically,
An outer wall heat insulating board, wherein a coating layer having a waterproof property is provided on the surface of the foamed resin plate and the inner surface of the recess. The coating layer has a two-layer structure,
The inner layer is an asphalt layer obtained by applying and drying asphalt diluted with petroleum,
2. The outer wall heat insulation board according to claim 1, wherein the outer layer is a coating layer mainly composed of an acrylic resin. The coating layer is a single layer structure,
The main raw material for this coating layer is a mixture of an acrylic resin-based main agent, an inorganic hydraulic curing agent containing cement powder, and asphalt powder,
The outer wall heat insulating board according to claim 1, wherein the blending ratio of the asphalt powder is 10 to 30% of the total weight by weight.

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