JP2005264481A - Cushioning sheet and heat-insulating waterproof structure and heat-insulating waterproof construction method using cushioning sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize the prevention of a conduction to a heat-insulating material of a heat in the case of the heating of a fixture and the prevention of the movement of a plasticizer from a waterproof layer to the heat-insulating material at a low cost under a workability having a high efficiency in a heat-insulating waterproof structure in which the waterproof layer is fixed on the top face of a heat-insulating layer by melting an adhesive by the high-frequency heating of the fixture. <P>SOLUTION: The heat-insulating waterproof structure has a heat-insulating material layer laid on a backing, a cushioning sheet stretched on the top face of the heat-insulating material layer and the fixture dotted on the cushioning sheet and engaged with the backing. The waterproof structure further has a waterproof sheet laminated on the cushioning sheet, and an adhesive layer being melted by a high-frequency induction heating between the fixture and the waterproof sheet and fixing the waterproof sheet to the fixture. The cushioning sheet is composed of a heat-shielding layer for preventing an effect on the heat-insulating material of the heat generated in the fixture and a plasticizer shielding layer for preventing the translation of the plasticizer from the waterproof sheet to the heat-insulating material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

TECHNICAL FIELD The present invention relates to a heat insulating waterproof technology on a roof or other roof portion of a building, and more specifically, a waterproof structure in which a waterproof sheet is stretched and fixed on a heat insulating material layer by a high frequency induction heating method, and a method for the same The present invention relates to a buffer sheet.

Recognizing the effect of external heat insulation in buildings, today, a construction method in which a heat insulating material is laid on the base and a waterproof layer is formed on the upper surface of the building is also widely used. For the waterproof layer, a waterproof sheet made of vinyl chloride resin is frequently used from the viewpoint of having many advantages such as excellent workability and weather resistance, while polystyrene foam, polyethylene foam and the like are used as the heat insulating material.

Conventionally, the fixing of the waterproof sheet to the construction surface is generally performed by screwing the waterproof sheet to the base via an attachment fitting from above the waterproof sheet. However, since this method has to form a hole in the waterproof sheet, it is always used to damage the waterproof property.
Therefore, instead of such a method, a metal fitting that is engaged with the base by a screw without opening a hole in the waterproof sheet is sheathed between the heat insulating layer and the waterproof sheet and heated from the surface of the waterproof sheet by high frequency induction. However, a method for melting the adhesive between the metal fitting and the back surface of the waterproof sheet to fix the waterproof sheet to the metal fitting has been proposed, and has been implemented at many construction sites.

A technology that heats high-frequency metal fittings that are fixed to the base by screws that penetrate the heat insulating material and are scattered on the surface of the heat insulating material, and melts the adhesive between the metal fitting and the back of the waterproof sheet to fix it to the metal fitting through the waterproof sheet One of the problems is that the heat-insulating material in contact with the metal fitting is melted by heating of the metal fitting and sinks into the portion to cause wrinkles in proper fixing.
For this reason, various countermeasures have been taken in the past, but the following documents disclose new proposals and background arts relating to adiabatic and waterproof technology by high-frequency heating.
JP 2003-90105 A

However, since the technique according to Patent Document 1 is configured to previously attach a heat shielding layer to each sheet fixing bracket, the manufacturing of the bracket requires a complicated process, resulting in an increase in the cost of the entire construction. There is also a problem that the cost is increased by the amount of the heat shielding layer even when diverting to other. Furthermore, there is a problem that special prevention means must be provided between the waterproof sheet and the heat insulating material in order to prevent the migration of the plasticizer from the waterproof sheet such as a vinyl chloride sheet to the heat insulating material.

  The present invention relates to a heat insulating waterproof structure in which a waterproof layer is fixed by melting an adhesive by high frequency induction heating on the heat insulating layer, and a heat insulating layer laid on the base and a heat shielding property stretched on the upper surface of the heat insulating layer A buffer sheet, a fixing bracket scattered on the buffer sheet and suspended on the base, a waterproof sheet laminated on the buffer sheet, and the fixing bracket and the waterproof sheet. An adhesive layer that is melted by high frequency induction heating to fix the waterproof sheet to the fixing bracket, and the buffer sheet includes a heat shielding layer and a waterproof sheet for preventing the heat generated by the fixing bracket from affecting the heat insulating material. An object of the present invention is to provide a heat insulating waterproof structure comprising a plasticizer blocking layer for preventing the plasticizer from being transferred to the heat insulating material.

  Further, in the heat insulating waterproof structure, the heat shield layer of the buffer sheet is composed of a sheet made of organic natural fibers, synthetic fibers, inorganic fibers alone or in combination, and the plasticizer barrier layer is the front surface and / or the back surface of the sheet. In some cases, it is constituted by a resin film covering the surface, and a fixing metal fitting previously provided with an adhesive layer on the upper surface is fixed to the base by screwing.

  The invention of the present application is a buffer sheet that is sheathed between a heat insulating layer and a waterproof sheet that is coated on the upper surface, and comprises a heat shield layer and a plasticizer barrier layer, wherein the heat shield layer is an organic natural fiber. A buffer sheet for a heat-insulating waterproofing method, wherein the plasticizer barrier layer is formed of a resin film covering the front and / or back of the sheet, or any one of the sheets. To solve the above problems.

Furthermore, the present invention intends to solve the above-mentioned problems by providing a heat insulating waterproofing method comprising the following steps.
(A) a process of laying a heat insulating material layer on the entire surface of the base,
(Mouth) A step of stretching the buffer sheet having any one of the above configurations over the entire surface of the heat insulating material layer, and screwing the buffer sheet and the heat insulating material layer to the base with the fixing bracket according to claim 2,
(C) Next, a step of stretching a waterproof sheet on the buffer sheet,
(2) A step of fixing the waterproof sheet to the fixing bracket by melting the adhesive between the upper surface of the fixing bracket and the waterproof sheet through the waterproof sheet by high-frequency induction heating.

With the above configuration, the present invention can obtain the following effects.
B. No special fixture with a heat shield layer is required, and the construction cost can be reduced in combination with the versatility of the fixture.
Mouth. By simply stretching the buffer sheet, it is possible to prevent the conduction of heat to the heat insulating material during heating of the metal fittings, and at the same time, prevent the plasticizer from transferring from the waterproof sheet to the heat insulating material. Is unnecessary, improving the work efficiency of the work and reducing the total cost of the work.

The buffer sheet is formed of a sheet made of organic natural fibers, synthetic fibers, inorganic fibers alone or in combination, and is configured to shield heat conduction from the fixture to the heat insulating material during high frequency heating. When polystyrene foam or the like is used as the heat insulating material, a plasticizer blocking layer is provided on the sheet in order to prevent plasticizer migration from a waterproof sheet such as polyvinyl chloride. This plasticizer barrier layer is formed by sticking a resin film such as polyethylene or polypropylene on both the front and back surfaces or the front and back surfaces of the sheet. As a papermaking sheet, so-called roofing base paper as a base material to which asphalt is applied at the time of forming the roof base material is low-cost, and it is easy to form into a roll shape, so that it is easy to handle during construction, etc. Have advantages.
Polyester fibers and the like are added to such base paper in order to improve water resistance, tensile performance, and tear strength. Moreover, the nonwoven fabric by an organic natural fiber and a synthetic fiber can also be used for a sheet | seat. In both cases of the former and the latter, the ratio of natural organic fibers should be 30% by weight or more in order to effectively block the influence of heat on the heat insulating material in the metal fitting.

  FIG. 1 is a cross-sectional view showing one embodiment of a heat insulating waterproof structure according to the present invention. In the figure, 1 is the rooftop of the building, etc., the concrete grounds 1 and 2 that require the formation of a waterproof layer are the heat insulation layers laid on the top surface of the concrete ground 1, and 3 is a buffer stretched on the surface of the heat insulation layer 2 Sheet 4 is a vinyl chloride sheet as a waterproof sheet affixed to the buffer sheet 3 soil. The vinyl chloride sheet 4 is fixed to the concrete base 1 via a fixing bracket 6 which is in the buffer sheet 3 soil and is suspended from the concrete base 1 by screws 5. That is, the top portion of the fixing metal 6 and the back surface of the vinyl chloride sheet 4 are fixed by the adhesive layer 7, whereby the PVC sheet 4 is indirectly fixed to the concrete base 1 by the fixing metal 6. The adhesive layer 7 adheres to the back surface of the PVC sheet 4 and the upper surface of the fixing metal 6 by applying a thermoplastic resin to the upper surface of the fixing metal 6 or placing the resin formed in a film shape on the PVC sheet 4 The adhesive layer 7 is melted by applying a high frequency from the outer surface and heating the fixture 6. In addition, inconveniences such as melting of the heat insulating material layer 2 due to heat conduction during heating of the fixture 6 are prevented by the configuration of the buffer sheet 3 described later.

  FIG. 2 is a cross-sectional view showing one embodiment of the buffer sheet 3. As shown in FIG. As shown in the figure, the buffer sheet 3 is a heat insulating material from the heat insulating layer 3a for preventing the influence on the heat insulating material layer 2 for melting the adhesive generated in the fixing metal 6 and the PVC sheet 4 as a waterproof sheet. And a resin film 3b as a plasticizer blocking layer for preventing the plasticizer from transferring to the layer 2.

In this embodiment, the heat shield layer 3a is made of a papermaking sheet made of organic natural fibers.
That is, the papermaking sheet 3a is formed by beating and combining organic natural fibers such as waste paper such as wool, cotton, and newspapers, and wood chips, and has a weight of 200 g / m2 and a thickness of O. About 5mm is used. Although the weight of the papermaking sheet 3a can be made lighter than the above, according to experiments, when the fixing metal 6 is heated, the heat insulating material melts and sinks at about 100 g / square meter. In order to improve the water resistance, tensile performance, tear strength of the papermaking sheet 3a, polyester fibers and the like may be added, but the ratio of organic natural fibers is always 30% by weight in order to maintain the necessary heat shielding properties. The above is preferable.

  On the other hand, the resin film 3b as a plasticizer blocking layer is formed by laminating a polyethylene film 3b on a papermaking sheet 3a as shown in FIG. 2 in this embodiment. By the way, the plasticizer blocking layer 3b is a measure for preventing the plasticizer from being transferred from the PVC sheet 4 to the heat insulating material layer 2. Therefore, it is necessary when the heat insulating material is made of polystyrene foam or the like, but is not affected by the plasticizer. In the case of a heat insulating material made of a material, the paper sheet 3a alone constitutes the buffer sheet 3.

  FIG. 3 and FIG. 4 are perspective views showing a related configuration of each member in the construction example of the heat insulating waterproof structure according to the above embodiment. A unit-sized polystyrene foam 2a is spread over the entire required portion of the concrete base 1, and the intersections thereof are fixed by a washer 2b to form the heat insulating layer 2. Next, the buffer sheet 3 is stretched over the entire surface of the heat insulating material layer 2. As the buffer sheet 3, a sheet having a plasticizer blocking layer as shown in FIG. 2 (b) is used as polystyrene is used as the heat insulating material. Then, the required portion of the buffer sheet 3 is lifted to the concrete base 1 by the fixing bracket 6. As shown in FIG. 4, the fixing metal 6 has a disk shape and is fixed to the concrete base 1 with screws 5 through a through hole in the center. A thermoplastic resin adhesive is applied to the top of the fixing metal 6.

  As shown in FIG. 4, after the buffer sheet is stretched on the concrete base 1 soil, the fixing bracket 6 is fixed to the concrete base 1 with screws 5 on the top surface of the buffer sheet 3. Next, the PVC sheet 4 as a waterproof sheet is stretched over the entire construction surface, and the back surface of the PVC sheet 4 and the top of the fixing bracket 6 are fixed with an adhesive to complete the operation. Fixing with an adhesive is performed by heating and melting the adhesive between the back surface of the PVC sheet 4 and the top of the fixing bracket 6 and then cooling and solidifying. However, melting of the adhesive is performed by high frequency induction. Is performed by heating.

  That is, on the surface of the PVC sheet 4, the installation part of the fixing metal 6 is a convex part, and with this in mind, high frequency power is applied to the fixing metal 6 at the corresponding location via the PVC sheet 4 by the high frequency induction heating device. When applied, the fixing metal 6 is heated and the adhesive at the top is melted to join the back surface of the vinyl chloride sheet 4 and the surface of the fixing hole 6, and the PVC sheet 4 is fixed to the concrete base 1 via the fixing metal 6. The heat generated in the fixing bracket 6 is blocked by the papermaking sheet 3a as the heat shielding means of the buffer sheet 3, and is not conducted to the heat insulating material layer 2, so that the heat insulating material melts and the fixing bracket sinks to fix the waterproof sheet. There will be no trouble.

  Further, the plasticizer blocking layer 3b of the resin film in the buffer sheet 3 can prevent the plasticizer from being transferred from the PVC sheet 4 to the heat insulating material layer 2, and polystyrene foam or the like can be used as the heat insulating material. When using a heat insulating material that is chemically stable with respect to the plasticizer, the buffer sheet 3 only needs to have a heat shielding function, and therefore, the buffer sheet may be composed of only the papermaking sheet.

1 is a cross-sectional view showing one embodiment of a heat insulating waterproof structure according to the present invention. 3 is a cross-sectional view showing an example of the buffer sheet 3. FIG. It is a perspective view which shows the construction example of the heat insulation waterproof structure which concerns on the said Example. FIG. 4 is a perspective view showing a related configuration of each member in FIG.

Explanation of symbols

1 Concrete base
2 Insulation layer
3 Buffer sheet
4 Tarpaulin
6 Fixing bracket
7 Adhesive

Claims (4)

In a heat insulating waterproof structure in which a waterproof layer is fixed by melting adhesive by high frequency induction heating on the heat insulating layer, a heat insulating material layer laid on the base, a buffer sheet stretched on the upper surface of the heat insulating material layer, and a buffer sheet Fixing brackets scattered on the base and scattered on the base, waterproof sheets laminated on the buffer sheet, and fixed between the fixing brackets and the waterproof sheet and melted by high frequency induction heating to fix the waterproof sheet The buffer sheet is provided with an adhesive layer that is fixed to the metal fitting, and the buffer sheet prevents the heat generated from the fixing metal from affecting the heat insulating material and the plasticizer from the waterproof sheet to the heat insulating material. A heat insulating waterproof structure characterized by comprising a plasticizer barrier layer for the purpose. 2. The heat insulating waterproof structure according to claim 1, wherein the heat shielding layer of the buffer sheet is composed of a sheet composed of organic natural fibers, synthetic fibers, inorganic fibers alone or in combination, and the plasticizer barrier layer is the front surface and / or back surface of the sheet. A heat-insulating and water-proof structure characterized in that the fixing metal fitting, which is made of a resin film covering one surface and the adhesive is pre-applied on the upper surface, is fixed to the base by screwing. A buffer sheet that is externally covered with a heat insulating layer and a waterproof sheet coated on the upper surface, and is composed of a heat insulating layer and a plasticizer blocking layer, and the heat insulating layer includes organic natural fibers, synthetic fibers, and inorganic fibers. A cushioning sheet for a heat insulating waterproofing method, wherein the plasticizer blocking layer is composed of a resin film that covers the front and / or back surfaces of the papermaking sheet. Thermal insulation waterproofing method consisting of the following processes.
(A) a process of laying a heat insulating material layer on the entire surface,
(Mouth) A step of stretching the buffer sheet according to any one of claims 1 to 3 over the entire surface of the heat insulating material layer, and screwing the buffer sheet and the heat insulating material layer to the base with the fixing bracket according to claim 2,
(C) Next, a step of stretching a waterproof sheet on the buffer sheet,
(2) A step of fixing the waterproof sheet to the fixing bracket by melting the adhesive between the upper surface of the fixing bracket and the waterproof sheet through the waterproof sheet by high-frequency induction heating.

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