JP2009007923A - Heat-insulating waterproof structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-insulating waterproof structure in which a heat insulating layer is arranged between a substrate and a waterproof sheet, and which can prevent the occurrence of problems such as the separation and fracture of the waterproof sheet by preventing the waterproof sheet from being lifted near a boundary between a flat portion and a rising portion by the heat shrinkage of the heat insulating layer. <P>SOLUTION: The heat insulating layer 2 is laid on an internal corner portion in a boundary position between the flat portion 1a and the rising portion 1b; an approximately-L-shaped cross-section corner member 3 with a rubber surface is arranged astride the flat portion 1a and the rising portion 1b, and anchored to the substrate along with the heat insulating layer 2; and the waterproof sheet 5a laid on the flat portion 1a and the waterproof sheet 5b laid on the rising portion 1b are bonded and fixed to the corner member 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat insulating waterproof structure in which a waterproof sheet is fixed via a heat insulating layer on a base. Specifically, the problem that the waterproof sheet floats up along the corner at the boundary between the flat field part and the rising part is solved. Related to the heat insulating waterproof structure.

There is a waterproof structure in which a roof is waterproofed by laying a sheet made of rubber or synthetic resin on the base of a building roof or a veranda. Although it is a single-layer waterproof sheet composed of a uniform material of rubber or synthetic resin, it is susceptible to environmental changes such as temperature changes, and has problems such as poor dimensional stability and wrinkles. In addition, when the zero span tension is applied due to a crack generated in the base, local deterioration occurs in the waterproof sheet, and there is a case where the waterproof sheet breaks from the location.

  In particular, if a problem such as a rise in the corner occurs, it may lead to a serious problem such as the waterproof sheet being peeled off from the ground or ruptured by the negative pressure caused by the strong wind. It was.

  In addition, as disclosed in Patent Document 1, for example, a heat insulating waterproof structure in which a heat insulating layer made of a foam is interposed between a base and a waterproof sheet has been conventionally performed. By arranging the foam layer on the back surface of the waterproof sheet in this way, it can be improved against the occurrence of blistering due to transpiration of the base water, the problem of adhesion deterioration, the countermeasure to cracks generated on the base surface, etc. it can.

JP-A-60-152863

  However, the heat insulating layer made of the resin foam or the like itself has a property of expanding and contracting due to a temperature change. For example, as shown in FIG. 6, a ground flat portion 11a composed of a flat portion 11a and a rising portion 11b. In FIG. 1, a heat insulating layer 12 is interposed between the base and the waterproof sheet 15a, and the heat insulating layer 12 is disposed so as to abut against the rising portion 11b. The waterproof sheet 15 is generally structured such that the waterproof sheet 15a laid on the flat field portion 11a is slightly bent over the rising portion 11b, and the waterproof sheet 15b of the rising portion 11b is overlapped and joined thereto. is there.

  However, due to the shrinkage of the heat insulating layer, the heat insulating layer 12 retreats from the rising portion 11b as shown in FIG. 7, and as a result, the waterproof sheet 15a bonded and fixed to the heat insulating layer 12 also retreats from the rising portion 11b together with the heat insulating layer 12. Thus, the waterproof sheet 15 is lifted near the boundary between the flat field portion 11a and the rising portion 11b. When a strong wind such as a typhoon is received in a state where the lift is generated as described above, the waterproof sheet 15 may be peeled off from the base due to a negative pressure or may be broken.

  In order to solve such a problem, as shown in FIG. 8, an attempt is made to reduce the influence of shrinkage caused by temperature change by making a cut K in the heat insulating layer 12 at a position close to the rising portion 11b to make it independent. It was made.

  However, even if such a structure is adopted, it is impossible to eliminate the heat insulation layer from retreating from the rising portion due to shrinkage, and even if there is a difference in degree, the occurrence of floating is inevitable. In addition, the method of laminating a plurality of heat insulating layers has a problem that it takes time to install and prolongs the construction time.

  Therefore, in the present invention, in the heat insulating waterproof structure in which the heat insulating layer is disposed between the base and the waterproof sheet, the waterproof sheet is prevented from being floated near the boundary between the flat field part and the rising part due to the heat shrinkage of the heat insulating layer. An object of the present invention is to provide a heat insulating waterproof structure that can prevent problems such as peeling and breakage of the waterproof sheet.

  In order to achieve the above object, in claim 1 of the present invention, in the heat insulating waterproof structure in which the waterproof sheet is fixed to the base having the flat field portion and the rising portion via the heat insulating layer, the boundary between the flat field portion and the rising portion. In addition, a heat insulating layer is laid in the corner, and the surface is made of rubber, and a corner member having an approximately L-shaped cross section is placed across the flat field and the rising part, and anchored to the ground together with the heat insulating layer. And the waterproof sheet laid in the flat part and the waterproof sheet laid in the rising part are bonded and fixed to the corner member.

  Moreover, in Claim 2, it is set as the heat insulation waterproof structure of Claim 1 consisting of the structure which laminated | stacked the surface sheet which consists of rubber on the shape retention layer.

  In Claim 3, it is set as the heat insulation waterproof structure of Claim 2 whose shape retention layer of a corner member is a steel plate.

  In Claim 4, it is set as the heat insulation waterproof structure in any one of Claims 2-3 formed by pinching and adhering the waterproof sheet of a flat field part between the shape retention layer of a corner member, and a surface sheet.

  In Claim 5, it is set as the heat insulation waterproof structure in any one of Claims 1-4 which becomes a structure which laminated | stacked the heat insulation layer of the heat insulation layer.

  According to the first aspect, the heat insulating layer disposed on the base of the flat field portion is forcibly fixed to the base and the rising portion by the anchor member. Even if it occurs, it does not retreat from the rising part. In addition, along with this, a corner member is arranged across the flat field part and the rising part, and the waterproof sheet of the flat field part and the waterproof sheet of the rising part are both fixed to the corner member, and waterproof at the boundary between the two. It is also possible to prevent the sheet from floating.

  According to claim 2, the corner member is configured to have a configuration in which a surface sheet made of rubber is laminated on a shape-retaining layer, and the corner member capable of maintaining a corner shape from a flat field portion to a rising portion by the shape-retaining layer. A waterproof sheet made of rubber can be easily bonded and fixed.

  In claim 3, the shape holding layer of the corner member is a steel plate, the shape of the corner member is firmly held, and a waterproof sheet made of rubber is also bonded and fixed to the surface sheet made of rubber laminated on the surface thereof. it can.

  According to claim 4, when the waterproof sheet is bonded and fixed to the corner member, the waterproof sheet in the flat field portion is sandwiched and bonded between the surface sheet and the shape-retaining layer. Therefore, water leakage from the joint portion can be reduced.

  According to claim 5, the heat insulating layer is formed by laminating a plurality of heat insulating materials, and the difference between the thermal expansion coefficients due to the change of the environmental temperature causes a deviation between the base, the heat insulating layer, and the waterproof sheet, thereby waterproofing. The problem that wrinkles occur on the surface of the sheet can be solved.

  The present invention is, for example, a heat-insulating and waterproofing structure applied to a large flat field portion 1a on the roof of a building and a place where a rising portion 1b is formed so as to surround the periphery of the building as shown in FIG. is there. For example, the corners where the flat field portion 1a and the rising portion 1b intersect at a substantially right angle are formed on the four sides, and the waterproof sheet at the corner is likely to float, and the waterproof sheet and the heat insulating layer are fixed. It is what you have.

  FIG. 2 is a cross-sectional view according to the heat insulating waterproof structure of the present invention, in which a heat insulating layer 2 is arranged on the flat field portion 1a of the base 1 composed of the flat field portion 1a and the rising portion 1b. On top of that, a corner member 3 having a substantially L-shaped cross section as shown in FIG. 4 is arranged so as to straddle the flat field portion 1a and the rising portion 1b, and the anchor member 4 is used on each surface to be driven into the base 1 and fixed. ing. In the flat field portion 1a, the anchor member 4 penetrates the corner member 3 and the heat insulating layer 2 and is driven into the base 1a.

  The waterproof sheet 5 is laid and arranged from above, and is divided into a waterproof sheet 5a laid on the flat field 1a and a waterproof sheet 5b laid on the rising part 1b, and the waterproof sheet 5a laid on the flat field 1a. The end portion of the waterproof sheet 5b that is bonded and fixed to the portion of the corner member 3 that is disposed on the flat field portion side and that is laid on the rising portion is the portion of the end portion that is disposed on the rising portion side of the corner member 3 Adhered and fixed to.

  In the case where the above-described corner is formed between the flat field portion 1a and the rising portion 1b, the flat field portion 1a or the rising edge is used to lay and arrange the waterproof sheet 5 along the base 1 in such a corner. Any one of the waterproof sheets 5 of the portion 1b needs to be bent along. However, since the waterproof sheet 5 has a certain thickness, it is difficult to bend it along the right angle formed by the flat field portion 1a and the rising portion 1b. Will cause a float.

  By adopting the structure of the present invention, it is not necessary to bend the waterproof sheet 5a of the flat field portion 1a and the waterproof sheet 5b of the rising portion 1b, so that the problem that the waterproof sheet 5 is lifted can be solved. .

  Further, when the heat insulating layer 2 is interposed between the base 1 and the waterproof sheet 5 in the flat field portion 1a for heat insulation of the building, the waterproof sheet 5 is also pulled by the heat shrinkage of the heat insulating layer 2, and similarly There was a problem that the waterproof sheet 5 was lifted at a right angle portion which is a boundary between the portion 1a and the rising portion 1b.

  In the present invention, since the heat insulating layer 2 is driven and fixed to the base 1 with the anchor member 4 using the corner member 3 having a substantially L-shaped cross section, even when the heat insulating layer 2 contracts due to a change in ambient temperature, the anchor The sheet is driven by the member 4 and pressed to the end by the corner member 3 and is physically forcibly fixed to the base 1 and does not move backward from the rising portion 1b, and the waterproof sheet due to the cause No floating of 5 occurs.

  Examples of the waterproof sheet 1 used in the present invention include ethylene / propylene / diene / monomer (EPDM), butyl rubber (IIR), modified butyl rubber (modified IIR), polyisobutylene (PIB), modified polyisobutylene (modified PIB), A single rubber such as an olefinic thermoplastic elastomer or a blend thereof can be used.

  The heat insulating layer 2 is made of polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyurethane (PU), polystyrene (PS), etc., and its expansion ratio is 10 to 40 times, and its thickness is 1 A heat insulating layer of 50 mm or more is formed by stacking 4 to 50 mm or a plurality of heat insulating materials per sheet, and this sheet-like foam material is a waterproof sheet that provides a cushioning effect, heat insulating effect, and cushioning effect during walking on the ground 1 5 is assigned. In the case where members made of different materials are laminated as in the present invention, a difference may occur between the members due to a change in environmental temperature due to a difference in thermal expansion coefficient between the materials. In particular, when using a heat insulating layer 2 having a large thickness, a deviation occurred between the members by using the heat insulating layer 2 in which a plurality of heat insulating materials are stacked as shown in FIG. However, the deviation can be absorbed, distortion is eliminated, and wrinkles can be prevented from occurring on the waterproof sheet on the surface.

  The corner member 3 has a rubber surface so that a waterproof sheet 5 made of rubber can be bonded. It may be made of a rubber material that can be bonded to the waterproof sheet 5 and has a rigidity that can hold the shape, or may be one in which the surface of the shape holding layer 3a is covered with a surface sheet 3b made of rubber. As the shape retention layer 3a, a metal plate such as a steel plate, a hot dip galvanized steel plate, a hot dip aluminum plated steel plate, a cold rolled stainless steel plate, an aluminum plate, an aluminum alloy plate, or a resin made of a resin such as polyvinyl chloride, polyethylene, or polypropylene is also used. It is possible. This shape-retaining layer 3a needs to have sufficient rigidity when used as a corner member, and although it varies depending on the material, it usually has a thickness of about 0.3 to 2.0 mm. The If it is less than 0.3 mm, the rigidity is low and it is difficult to maintain the shape, and the deformation becomes large. On the other hand, if it exceeds 2.0 mm, the thickness is too large and a large step is generated on the waterproof sheet, which is not preferable in terms of appearance.

  The top sheet 3b is preferably made of the same material in order to improve the adhesion to the waterproof sheet 5, and as the material, ethylene / propylene / diene / monomer (EPDM), butyl rubber (IIR), modified butyl rubber ( Examples thereof include rubber alone such as modified IIR), polyisobutylene (PIB), modified polyisobutylene (modified PIB), and olefinic thermoplastic elastomer, or a blend thereof. The thickness of the surface sheet 3b is preferably in the range of 0.8 to 2.0 mm, and if it is less than 0.8 mm, there is a problem that it is insufficient in strength and breaks due to impact or the like. Since it appears as a large step on the surface of the waterproof sheet, it is not preferable.

  When the shape retaining layer 3a is a metal plate, the surface sheet 3b is bonded using an adhesive by degreasing the metal plate with an alkali or a solvent and then roughening the surface by a blast method or a water jet method. It can be firmly joined.

Moreover, the sealing material 6 is given between the waterproof sheet 5b and the surface sheet 3b as needed. By doing so, the waterproofness in such a corner can further be improved. As the sealing material 6, unvulcanized or unvulcanized rubber can be used, and the types of rubber are ethylene / propylene / diene rubber (EPDM), butyl rubber (IIR), EPDM and IIR, which are excellent in weather resistance. What consists of a blend is suitable and a stearic acid, carbon black, an inorganic filler, ZnO, etc. are mix | blended with a rubber part as needed. In the case of this rubber-based sealing material, the Mooney viscosity (ML _{1 + 4} 100 ° C.) is preferably 3 to 20, and if it is less than 10 (ML _{1 + 4} 100 ° C.), the thermal deformation is large and sagging occurs particularly at high temperatures. It has a problem, and if it is a value larger than 40 (ML _{1 + 4} 100 ° C.), it is not preferable because watertightness becomes poor as a sealing material. As the sealing material, in addition to the above rubber-based materials, modified silicon, polyurethane and the like can be used, and a water expansion type sealing material can also be used.

  FIG. 5 is a cross-sectional view according to another embodiment of the present invention. The same is true in that the heat insulating layer 2 is disposed on the base 1 and the corner member 3 is installed and the waterproof sheet 5 of the rising portion 1b is bonded and fixed to the rising portion 1b side of the corner member 3. The part 1a side uses a material in which the shape retaining layer 3a and the surface sheet 3b are not fixed, and the end portion of the waterproof sheet 5 laid on the flat field portion 1a is sandwiched between the shape retaining layer 3a and the surface sheet 3b. Thus, the waterproof sheet 5 and the top sheet 3b are bonded together. By adopting such a structure, the direction in which the top sheet 3b and the waterproof sheet 5b are superposed is in a direction that matches the water gradient, and it is a form in which the occurrence of water leakage from the portion where the two are bonded is unlikely to occur. it can.

  It can be used as a heat insulating waterproof structure to be constructed on the roof of a building or the like.

It is a principal part perspective view of the rooftop which constructs the heat insulation waterproof structure of this invention. It is principal part sectional drawing of this invention heat insulation waterproofing structure. It is principal part sectional drawing equivalent to FIG. 2 at the time of laminating | stacking two heat insulation layers. It is a perspective view of a corner member. It is principal part sectional drawing which shows another example of this invention heat insulation waterproofing structure. It is principal part sectional drawing of the conventional heat insulation waterproof structure. It is principal part sectional drawing of the place where the heat insulation layer shrunk by the conventional heat insulation waterproof structure. It is principal part sectional drawing which shows another example of the conventional heat insulation waterproof structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground 1a Flat part 1b Rising part 2 Heat insulation layer 3 Corner member 3a Shape retention layer 3b Surface sheet 4 Anchor member 5 Waterproof sheet 6 Sealing material

Claims (5)

  In a heat insulating waterproof structure in which a waterproof sheet is fixed to a base having a flat field part and a rising part via a heat insulating layer, a heat insulating layer is laid in the corner of the boundary between the flat field part and the rising part, and the surface is made of rubber. A corner member having a substantially L-shaped cross section is arranged across the flat field part and the rising part, anchored to the ground together with the heat insulating layer, and a waterproof sheet laid on the flat field part and a waterproof sheet laid on the rising part. A heat insulating waterproof structure characterized by being bonded and fixed to the corner member.   The heat insulating waterproof structure according to claim 1, wherein the corner member has a configuration in which a surface sheet made of rubber is laminated on a shape maintaining layer.   The heat insulating waterproof structure according to claim 2, wherein the shape retaining layer of the corner member is a steel plate.   The heat insulating waterproof structure according to any one of claims 2 to 3, wherein a waterproof sheet in a flat field portion is sandwiched and bonded between a shape retaining layer of a corner member and a surface sheet.   The heat insulating waterproof structure according to any one of claims 1 to 4, wherein the heat insulating layer is configured by laminating a plurality of heat insulating materials.

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