Screw-removal prevention plate, waterproof patch with protrusion, waterproof sheet fixing structure and waterproof sheet fixing method

Abstract

To provide a jig and a method for preventing screws from loosening and coming out of a substrate due to the influence of vibrations caused by wind in a sheet waterproofing mechanical fixing method.SOLUTION: A screw-removal prevention plate (1) used in a sheet waterproofing mechanical fixing method in which a waterproof sheet is fixed with screws, has a plate-shaped portion (2) and a protrusion (3) provided on one side of the plate-shaped portion, and the protrusion can be inserted into a screw recess so as not to rotate. This is a waterproof patch with protrusion (4) used in a sheet waterproofing mechanical fixing method in which a waterproof sheet is fixed with screws, and the waterproof patch with protrusion has a protrusion (6) that can be inserted into a screw recess so as not to rotate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a screw removal prevention plate and a waterproof patch with protrusions used in a sheet waterproofing mechanical fixing method for fixing a waterproof sheet with screws on the rooftop, roof, veranda, balcony, etc. of a building, as well as a fixing structure and a fixing method for a waterproof sheet using them. [Background technology]

[0002] The so-called mechanical waterproofing method is used to secure waterproof sheets in waterproof structures such as building roofs, verandas, and balconies. In this method, the waterproof sheet is secured to the roofing material with a fastening disk and screws. Methods for securing waterproof sheets with a fastening disk and screws include fastening a fastening disk with an adhesive layer to the roofing material with screws, laying the waterproof sheet on top of it, and then melting the adhesive layer with an electromagnetic induction heating device from above the waterproof sheet to bond the back of the waterproof sheet to the fastening disk (the so-called pre-casting method), and placing the fastening disk on top of the waterproof sheet and then driving in the screws (the so-called post-casting method).

[0003] The mechanical fixing method for waterproofing sheets is partially fixed to the substrate with screws and fixing discs. As a result, when wind blows through the construction area, negative pressure creates lift on the waterproofing sheet, and the stress on the waterproofing sheet due to wind blowing with varying strengths can act as vibrations with varying strengths. For this reason, there is concern that the screws may become loose due to these vibrations. There is a concern that if the screws become loose, the waterproofing sheet may break and fly away.

[0004] Various methods have been proposed to solve the problem of screws loosening and falling out of the base due to vibrations caused by wind. For example, Japanese Patent Application Laid-Open No. 2022-090577 (Patent Document 1) discloses a method of providing a resin coating layer on the upper surface of a fixing disk, and also providing a resin coating layer on the threaded portion of a screw, or providing a notch in the threaded portion of a screw. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2022-090577 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention provides a new means for solving the problem of screws loosening and coming out of the substrate due to vibrations caused by wind in sheet waterproofing mechanical fixing methods. [Means for solving the problem]

[0007] The present invention (I) is a screw-removal prevention plate used in a sheet waterproofing mechanical fixing method in which a waterproof sheet is fixed with screws, and is characterized in that the screw-removal prevention plate has a plate-shaped portion and a protrusion provided on one surface of the plate-shaped portion, and the protrusion can be inserted into the screw recess so that it cannot rotate.

[0008] The present invention (II) is a waterproof sheet fixing structure comprising a roof underlayment, fixing discs scattered on the roof underlayment, screws for fixing the fixing discs to the roof underlayment, and a waterproof sheet covering the fixing discs, characterized in that the waterproof sheet fixing structure further comprises the screw slip-out prevention plate of the present invention (I), which is arranged on the fixing discs and the protrusions of the screw slip-out prevention plate are inserted into the recesses of the screws so as not to rotate. The present invention (III) is a waterproof sheet fixing structure comprising a roof underlayment, insulation material provided on the roof underlayment, fixing discs scattered on the insulation material, screws for fixing the fixing discs and insulation material to the roof underlayment, and a waterproof sheet covering the insulation material and the fixing discs, characterized in that the waterproof sheet fixing structure further comprises the screw slip-out prevention plate of the present invention (I), which is positioned on the fixing disc and the protrusion of the screw slip-out prevention plate is inserted into the recess of the screw so that it cannot rotate. The present invention (IV) is a waterproof sheet fixing structure comprising a roof underlayment, a waterproof sheet placed on the roof underlayment, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs and the waterproof sheet to the roof underlayment, and a waterproof patch covering the fixing discs, and the waterproof sheet fixing structure further comprises the screw slip-out prevention plate of the present invention (I), which is arranged on the fixing disc and the protrusion of the screw slip-out prevention plate is inserted into the recess of the screw so that it cannot rotate. The present invention (V) is a waterproof sheet fixing structure comprising a roof underlayment, an insulating material placed on the roof underlayment, a waterproof sheet placed on the insulating material, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs, the waterproof sheet and the insulating material to the roof underlayment, and a waterproof patch covering the fixing discs, characterized in that the waterproof sheet fixing structure further comprises the screw slip-out prevention plate of the present invention (I), which is positioned on the fixing disc and the protrusion of the screw slip-out prevention plate is inserted into the recess of the screw so that it cannot rotate.

[0009] The present invention (VI) is the step of dotting the fixing discs onto the roof underlayment; The process of fixing the fixing disc to the roof substrate with screws. A step of placing the screw slip-out prevention plate of the present invention (I) on a fixing disk and inserting the protrusion of the screw slip-out prevention plate into the recess of the screw so that it cannot rotate; The process of covering the fixing disc and screw removal prevention plate with a waterproof sheet. A method for fastening a waterproof sheet, including: The present invention (VII) is The process of laying insulation on the roof substrate, dotting the insulation with fixing discs; A process of fixing the fixing disc and insulation material to the roof substrate with screws; A step of placing the screw slip-out prevention plate of the present invention (I) on a fixing disk and inserting the protrusion of the screw slip-out prevention plate into the recess of the screw so that it cannot rotate; The process of covering the insulation material, fixing discs and screw removal prevention plates with waterproof sheets. A method for fastening a waterproof sheet, including: The present invention (VIII) is The process of laying a waterproof sheet on the roof substrate, dotting the tarpaulin with fixing discs; A process of fixing the fixing disk and waterproof sheet to the roof substrate with screws. A step of placing the screw slip-out prevention plate of the present invention (I) on a fixing disk and inserting the protrusion of the screw slip-out prevention plate into the recess of the screw so that it cannot rotate; The process of covering the fixing disc and screw removal prevention plate with a waterproof patch. A method for fastening a waterproof sheet, including: The present invention (IX) is The process of laying insulation on the roof substrate, A process of laying a waterproof sheet on top of the insulation material; dotting the tarpaulin with fixing discs; The process of fixing the fixing disk, waterproof sheet and insulation material to the roof substrate with screws. A step of placing the screw slip-out prevention plate of the present invention (I) on a fixing disk and inserting the protrusion of the screw slip-out prevention plate into the recess of the screw so that it cannot rotate; The process of covering the fixing disc and screw removal prevention plate with a waterproof patch. A method for fastening a waterproof sheet, including:

[0010] The present invention (X) is a waterproof patch used in a sheet waterproofing mechanical fixing method in which a waterproof sheet is fixed with screws, and the waterproof patch is a waterproof patch with protrusions that can be inserted into the recesses of the screws so that they cannot rotate.

[0011] The present invention (XI) is a waterproof sheet fixing structure comprising a roof underlayment, a waterproof sheet placed on the roof underlayment, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs and the waterproof sheet to the roof underlayment, and a waterproof patch covering the fixing discs, characterized in that the waterproof patch has a protrusion that can be non-rotatably inserted into the recess of the screw, the protrusion of the waterproof patch is non-rotatably inserted into the recess of the screw, and the waterproof patch is fixed to the fixing disc and the waterproof sheet. The present invention (XII) is a waterproof sheet fixing structure comprising a roof underlayment, an insulating material placed on the roof underlayment, a waterproof sheet placed on the insulating material, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs, the waterproof sheet and the insulating material to the roof underlayment, and a waterproof patch covering the fixing discs, characterized in that the waterproof patch has a protrusion that can be non-rotatably inserted into the recess of the screw, the protrusion of the waterproof patch is non-rotatably inserted into the recess of the screw, and the waterproof patch is fixed to the fixing disc and the waterproof sheet.

[0012] The present invention (XIII) is The process of laying a waterproof sheet on the roof substrate, dotting the tarpaulin with fixing discs; A process of fixing the fixing disk and the waterproof sheet to the roof substrate with screws; The process of covering the fixing disc with a waterproof patch A method for fixing a waterproof sheet, comprising: The waterproof patch has a protrusion that can be inserted into the recess of the screw so that it cannot rotate, The process of covering the fixing disk with the waterproof patch is a method of fixing a waterproof sheet, which includes inserting the protrusion of the waterproof patch into the recess of the screw so that it cannot rotate, and fixing the waterproof patch to the fixing disk and the waterproof sheet. The present invention (XIV) is The process of laying insulation on the roof substrate, A process of laying a waterproof sheet on top of the insulation material; dotting the tarpaulin with fixing discs; A process of fixing the fixing disk, waterproof sheet and insulation material to the roof substrate with screws; The process of covering the fixing disc with a waterproof patch A method for fixing a waterproof sheet, comprising: The waterproof patch has a protrusion that can be inserted into the recess of the screw so that it cannot rotate, The process of covering the fixing disk with the waterproof patch is a method of fixing a waterproof sheet, which includes inserting the protrusion of the waterproof patch into the recess of the screw so that it cannot rotate, and fixing the waterproof patch to the fixing disk and the waterproof sheet.

[0013] The present invention includes the following embodiments. [1] A screw-removal prevention plate used in a sheet waterproofing mechanical fixing method in which a waterproof sheet is fixed with screws. The screw-removal prevention plate has a plate-shaped portion and a protrusion provided on one side of the plate-shaped portion, and the protrusion can be inserted into the screw recess so that it cannot rotate. [2] The screw-removal prevention plate according to [1], wherein the plate-shaped portion has a disk shape. [3] The screw-removal prevention plate according to [1] or [2] is a plate in which at least a portion of the surface of a core material made of metal or resin is coated with vinyl chloride resin, or is made of vinyl chloride resin, or is made of metal. [4] The screw-removal prevention plate according to any one of [1] to [3], wherein the screw-removal prevention plate has a pressure-sensitive adhesive layer or an adhesive layer on at least a part of the surface having the protrusions. [5] A screw-removal prevention plate according to any one of [1] to [4], wherein the shape of the protrusion is a triangle, a square, a hexagon, a cross, a minus sign, a star-shaped hexagon, or a combination thereof.

[0014] [6] A waterproof sheet fixing structure comprising a roof underlayment, fixing discs scattered on the roof underlayment, screws for fixing the fixing discs to the roof underlayment, and a waterproof sheet covering the fixing discs, wherein the waterproof sheet fixing structure further comprises a screw slip-out prevention plate described in any one of [1] to [5], the screw slip-out prevention plate is arranged on the fixing discs, and the protrusions of the screw slip-out prevention plate are inserted into the recesses of the screws so as not to rotate. [7] A waterproof sheet fixing structure comprising a roof underlayment, insulation material provided on the roof underlayment, fixing discs scattered on the insulation material, screws for fixing the fixing discs and insulation material to the roof underlayment, and a waterproof sheet covering the insulation material and the fixing discs, wherein the waterproof sheet fixing structure further comprises a screw slip-out prevention plate described in any one of [1] to [5], the screw slip-out prevention plate is positioned on the fixing disc, and the protrusion of the screw slip-out prevention plate is inserted into the recess of the screw so that it cannot rotate. [8] A waterproof sheet fixing structure comprising a roof underlayment, a waterproof sheet placed on the roof underlayment, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs and the waterproof sheet to the roof underlayment, and a waterproof patch covering the fixing discs, wherein the waterproof sheet fixing structure further comprises a screw slip-out prevention plate described in any of [1] to [5], the screw slip-out prevention plate is positioned on the fixing disc, and the protrusion of the screw slip-out prevention plate is inserted into the recess of the screw so that it cannot rotate. [9] A waterproof sheet fixing structure comprising a roof underlayment, insulation material placed on the roof underlayment, a waterproof sheet placed on the insulation material, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs, the waterproof sheet and the insulation material to the roof underlayment, and a waterproof patch covering the fixing discs, wherein the waterproof sheet fixing structure further comprises a screw slip-out prevention plate described in any of [1] to [5], the screw slip-out prevention plate is positioned on the fixing disc, and the protrusion of the screw slip-out prevention plate is inserted into the recess of the screw so that it cannot rotate.

[0015]

[10] dotting the roof substrate with fixing discs; The process of fixing the fixing disc to the roof substrate with screws. A step of placing the screw slip-out prevention plate according to any one of [1] to [5] on a fixing disk and inserting the protrusion of the screw slip-out prevention plate into the recess of the screw so that it cannot rotate; The process of covering the fixing disc and screw removal prevention plate with a waterproof sheet. How to secure the tarp, including:

[11] A process of laying insulation material on the roof substrate; dotting the insulation with fixing discs; A process of fixing the fixing disc and insulation material to the roof substrate with screws; A step of placing the screw slip-out prevention plate according to any one of [1] to [5] on a fixing disk and inserting the protrusion of the screw slip-out prevention plate into the recess of the screw so that it cannot rotate; The process of covering the insulation material, fixing discs and screw removal prevention plates with waterproof sheets. How to secure the tarp, including:

[12] A process of laying a waterproof sheet on the roof substrate; dotting the tarpaulin with fixing discs; A process of fixing the fixing disk and waterproof sheet to the roof substrate with screws. A step of placing the screw slip-out prevention plate according to any one of [1] to [5] on a fixing disk and inserting the protrusion of the screw slip-out prevention plate into the recess of the screw so that it cannot rotate; The process of covering the fixing disc and screw removal prevention plate with a waterproof patch. How to secure the tarp, including:

[13] A process of laying insulation material on the roof substrate; A process of laying a waterproof sheet on top of the insulation material; dotting the tarpaulin with fixing discs; The process of fixing the fixing disk, waterproof sheet and insulation material to the roof substrate with screws. A step of placing the screw slip-out prevention plate according to any one of [1] to [5] on a fixing disk and inserting the protrusion of the screw slip-out prevention plate into the recess of the screw so that it cannot rotate; The process of covering the fixing disc and screw removal prevention plate with a waterproof patch. How to secure the tarp, including:

[0016]

[14] A waterproof patch used in a sheet waterproofing mechanical fixing method in which a waterproof sheet is fixed with screws, the waterproof patch having a protrusion that can be inserted into the screw recess so that it cannot rotate.

[0017]

[15] A waterproof sheet fixing structure comprising a roof underlayment, a waterproof sheet placed on the roof underlayment, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs and the waterproof sheet to the roof underlayment, and a waterproof patch covering the fixing discs, wherein the waterproof patch has a protrusion that can be non-rotatably inserted into the recess of the screw, the protrusion of the waterproof patch is non-rotatably inserted into the recess of the screw, and the waterproof patch is fixed to the fixing disc and the waterproof sheet.

[16] A fixing structure for a waterproof sheet, comprising a roof underlayment, insulation material placed on the roof underlayment, a waterproof sheet placed on the insulation material, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs, the waterproof sheet and the insulation material to the roof underlayment, and a waterproof patch covering the fixing discs, wherein the waterproof patch has a protrusion that can be inserted non-rotatably into the recess of the screw, the protrusion of the waterproof patch is inserted non-rotatably into the recess of the screw, and the waterproof patch is fixed to the fixing disc and the waterproof sheet.

[0018]

[17] The process of laying a waterproof sheet on the roof substrate; dotting the tarpaulin with fixing discs; A process of fixing the fixing disk and the waterproof sheet to the roof substrate with screws; The process of covering the fixing disc with a waterproof patch A method for fixing a waterproof sheet, comprising: The waterproof patch has a protrusion that can be inserted into the recess of the screw so that it cannot rotate, The method for fixing a waterproof sheet includes the step of covering the fixing disk with a waterproof patch by inserting the protrusion of the waterproof patch into the recess of the screw so that the waterproof patch cannot rotate, and fixing the waterproof patch to the fixing disk and the waterproof sheet.

[18] A process of laying insulation material on the roof substrate; A process of laying a waterproof sheet on top of the insulation material; dotting the tarpaulin with fixing discs; A process of fixing the fixing disk, waterproof sheet and insulation material to the roof substrate with screws; The process of covering the fixing disc with a waterproof patch A method for fixing a waterproof sheet, comprising: The waterproof patch has a protrusion that can be inserted into the recess of the screw so that it cannot rotate, The method for fixing a waterproof sheet includes the step of covering the fixing disk with a waterproof patch by inserting the protrusion of the waterproof patch into the recess of the screw so that the waterproof patch cannot rotate, and fixing the waterproof patch to the fixing disk and the waterproof sheet. [Effects of the Invention]

[0019] The screw-removal prevention plate and protruding waterproof patch of the present invention can prevent screws from loosening and falling out of the base due to vibrations caused by wind in sheet waterproofing mechanical fixing construction methods. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a projection view (front view and bottom view) of a screw slippage prevention plate according to the present invention (I). [Figure 2] FIG. 2 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (II). [Figure 3] FIG. 3 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (III). [Figure 4] FIG. 4 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (IV). [Figure 5] FIG. 5 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (V). [Figure 6]FIG. 6 is a projection view (front view and bottom view) of the waterproof patch with protrusions of the present invention (X). [Figure 7] FIG. 7 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (XI). [Figure 8] FIG. 8 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (XII). DETAILED DESCRIPTION OF THE INVENTION

[0021] The present invention will be described in detail below with reference to the drawings, but the present invention is not limited to those shown in the drawings. FIG. 1 is a projection view of a screw slippage prevention plate according to the present invention (I), where FIG. 1(a) is a front view and FIG. 1(b) is a bottom view. The present invention (I) is a screw-removal prevention plate 1 used in a sheet waterproofing mechanical fixing method in which a waterproof sheet is fixed with screws, and is characterized in that the screw-removal prevention plate 1 has a plate-shaped portion 2 and a protrusion portion 3 provided on one surface of the plate-shaped portion, and the protrusion portion 3 can be inserted into the screw recess so that it cannot rotate.

[0022] The external shape of the plate-like portion 2 is not limited, and may be a circle, an ellipse, a square, a rectangle, a regular hexagon, a regular octagon, or any other polygon. The outer shape of the plate-like portion 2 is not limited to the shape shown in FIG. 1 (that is, circular). The outer shape of the plate-shaped portion 2 is preferably circular. That is, the plate-shaped portion 2 preferably has a disk shape. When the outer shape of the plate-shaped portion 2 is circular, that is, when the plate-shaped portion 2 has a disk shape, the outer diameter d of the plate-shaped portion 2 is preferably 5 to 150 mm, more preferably 10 to 100 mm, and even more preferably 20 to 90 mm. The thickness t of the plate-like portion 2 is not limited, but is preferably 0.05 to 10 mm, more preferably 0.1 to 5 mm, and even more preferably 0.3 to 3 mm.

[0023] The protrusion 3 can be inserted into the recess of the screw so that it cannot rotate. Here, "inserted so that it cannot rotate" means that after the protrusion 3 is inserted into the recess of the screw, the screw slip-out prevention plate 1 having the protrusion 3 and the screw having the recess cannot rotate independently of each other. In this case, the protrusion 3 may become non-rotatable simply by being inserted, or it may be made non-rotatable by performing another process in addition to the insertion. The shape of the protrusion 3 is not limited as long as the protrusion 3 can be inserted into the recess of the screw so that it cannot rotate. Here, the shape of the protrusion 3 refers to the shape shown in the bottom view, that is, the shape as seen from below. An example of the shape of the protrusion 3 is a shape that fits non-rotatably into the recess of a screw. The shape that fits non-rotatably into the recess of the screw may be, but is not limited to, a triangle, a rectangle (such as a square), a hexagon, a cross, a minus sign, a star-shaped hexagon, or a combination thereof. The screw slip-out prevention plate in Figure 1 has a square protrusion 3, so this plate can be used when the screw recess is a square hole. Conversely, if the screw slip-out prevention plate has a square protrusion 3, it can be used with a screw that has a square recess. The shape of the protrusion 3 is not limited to the shape shown in FIG. 1 (that is, a square). The recess of the screw may be a square hole, a hexagonal hole, a cross recess, a slot, a plus / minus, a hexalobular, or a combination thereof (such as a composite shape of a square hole and a cross recess), and the shape of the protrusion 3 is selected accordingly. When the recess of the screw is a square hole, the shape of the protrusion 3 is preferably square. When the recess of the screw is a hexagonal socket, the shape of the protrusion 3 is preferably hexagonal. When the recess of the screw is a cross recess, the shape of the protrusion 3 is preferably a cross shape. When the recess of the screw is a slot, the shape of the protrusion 3 is preferably a minus shape. When the recess of the screw is a plus or minus, the shape of the protrusion 3 is preferably a cross shape. If the screw recess is hexalobular, the shape of the protrusion 3 is preferably star-hexagonal. However, the shape of the protrusion does not have to be the same as the shape of the recess. Another example of the shape of the protrusion 3 is a shape that can fix the two opposing vertices where the diagonal of the screw recess is at its maximum. For example, if the recess is a square hole, the protrusion does not need to be square, but can be a slotted shape with the same size as the diagonal of the square recess to prevent rotation. In other words, as long as the two opposing vertices where the diagonal of the recess is at its maximum are fixed, rotation can be prevented not only with a slotted shape but also with two protrusions. Alternatively, the protrusion 3 may be inserted into a recess of a screw and fixed to the screw with an adhesive or the like. In this case, the protrusion 3 may have any shape as long as it can be inserted into the recess of the screw. For example, if the recess of the screw is rectangular, the protrusion 3 may be biased to one side of the rectangle and fixed with an adhesive or the like. The protrusion 3 preferably has a shape that fits non-rotatably into the recess of the screw.

[0024] The height h of the protrusion 3 is selected depending on the depth of the recess of the screw, but is preferably 0.1 to 10 mm, more preferably 0.3 to 7.5 mm, and even more preferably 0.5 to 5 mm.

[0025] The screw slippage prevention plate 1 may be formed from any material, including metal or resin. Examples of metals include iron, copper, stainless steel, brass, aluminum, magnesium, titanium, and zinc, as well as composites and plated products thereof, with stainless steel being preferred. The resin may be either a thermoplastic or thermosetting resin, including polyethylene, polypropylene, polybutylene terephthalate, polyethylene terephthalate, vinyl chloride resin, polystyrene, ABS resin, AS resin, acrylic resin, phenolic resin, urea resin, melamine resin, alkyd resin, polyester, epoxy resin, polyurethane, diallyl phthalate resin, silicone resin, and modified silicone resin. Vinyl chloride resin (rigid vinyl chloride resin or flexible vinyl chloride resin) is preferred. The screw-removal prevention plate 1 is preferably made of a metal or resin core material, at least a portion of whose surface is coated with vinyl chloride resin, or is made of vinyl chloride resin. By coating with vinyl chloride resin or being made of vinyl chloride resin, the plate has excellent processability, durability, and water resistance. When the screw slip-out prevention plate 1 is a metal or resin core material with at least a portion of its surface coated with vinyl chloride resin, the entire surface of the core material may be coated with vinyl chloride resin, or only a portion of the core material's surface may be coated with vinyl chloride resin. When only a portion of the core material's surface is coated with vinyl chloride resin, only one side of the core material may be coated. Preferably, the screw slip-out prevention plate 1 is a metal or resin core material with at least a portion of the surface opposite the surface having the protrusions coated with vinyl chloride resin. When the core material is made of metal, the metal constituting the core material is preferably stainless steel. When the core material is made of resin, the resin constituting the core material is preferably vinyl chloride resin. The plate-like portion 2 and the protrusion portion 3 may be made of the same material or different materials, but are preferably made of the same material.

[0026] The method for producing the screw-removal prevention plate is not limited, but the screw-removal prevention plate can be produced by integrally molding metal or resin using injection molding or the like, or by turret punch press processing, pressing, cutting, 3D printer processing, additive processing, molding processing, or subtractive processing. Screw-removal prevention plates, which are made by covering a core material with polyvinyl chloride resin, can be produced by turret punch press processing, pressing, cutting, 3D printer processing, additive processing, molding processing, and subtractive processing.

[0027] The screw slippage prevention plate preferably has an adhesive layer or a adhesive layer on at least a portion of the surface having the protrusions. By having an adhesive layer or a adhesive layer, it can be easily fixed to the fixing disk. The adhesive layer or the adhesive layer is preferably provided on the area of ​​the surface having the protrusions other than the protrusions. The adhesive layer or the adhesive layer may be provided on the entire area of ​​the surface having the protrusions other than the protrusions, or may be provided on a portion of the area of ​​the surface having the protrusions other than the protrusions. The pressure-sensitive adhesive or adhesive constituting the pressure-sensitive adhesive layer or adhesive layer is not limited, but examples thereof include vinyl acetate resins, polyvinyl acetal, ethylene vinyl acetate resins, vinyl chloride resins, acrylic resins, polyamides, cellulose, olefins, urea resins, melamine resins, phenolic resins, resorcinol resins, epoxy resins, polyesters, polyurethanes, polyaromatic resins, chloroprene rubbers, nitrile rubbers, styrene butadiene rubbers, polysulfides, butyl rubbers, silicone rubbers, acrylic rubbers, modified silicone rubbers, urethane rubbers, silylated urethane resins, and telechelic polyacrylates.

[0028] FIG. 2 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (II). The present invention (II) is a waterproof sheet fixing structure 10 comprising a roof underlayment 11, fixing discs 14 scattered on the roof underlayment, screws 15 for fixing the fixing discs to the roof underlayment, and a waterproof sheet 13 covering the fixing discs, wherein the waterproof sheet fixing structure 10 further comprises a screw slippage prevention plate 1 of the present invention (I), the screw slippage prevention plate 1 being arranged on the fixing discs 14, and the protrusion 3 of the screw slippage prevention plate being inserted non-rotatably into the recess of the screw 15.

[0029] The fixing structure of the waterproof sheet of the present invention (II) corresponds to an embodiment of the so-called pre-cast construction method in which no heat insulating material is used.

[0030] In a sheet waterproofing mechanical fixing method using a metal-based roofing material as roof underlayment 11, screws 15 tend to loosen from roof underlayment 11 due to vibrations caused by wind and rotate as they come out, but screw fallout prevention plate 1, which has protrusion 3 that can be inserted into the recess of screw 15 to prevent it from rotating, is placed on top of fixing disk 14 and screw 15, and protrusion 3 of screw fallout prevention plate 1 is inserted into the recess of screw 15 to prevent it from rotating, and waterproof sheet 13 covers fixing disk 14 and screw fallout prevention plate 1, so that screw fallout prevention plate 1 is sandwiched between waterproof sheet 13 and fixing disk 14, preventing screw 15 from rotating. Screw fallout prevention plate 1 may or may not be fixed to waterproof sheet 13 and / or fixing disk 14. Even though the screw fall-out prevention plate 1 is not fixed to either the waterproof sheet 13 or the fixing disk 14, the screw fall-out prevention plate 1 is sandwiched between the waterproof sheet 13 and the fixing disk 14 and pressed thereto, so that the rotation of the screw fall-out prevention plate 1 is suppressed by frictional force, and as a result, the rotation of the screw 15 is prevented.

[0031] Examples of the roof underlayment 11 include, but are not limited to, metal-based roofing materials, concrete underlayment, ALC underlayment, and wooden underlayment. Since screws 15 are easily removed from metal-based roofing materials due to vibrations caused by wind, the screw removal prevention plate of the present invention is particularly effective when the roof underlayment 11 is a metal-based roofing material.

[0032] Fixing disks 14 are scattered over the roof underlayment 11. The fixing disks 14 can be any disk-shaped member conventionally used in sheet waterproofing mechanical fixing methods. The fixing disks 14 preferably have a through-hole in the center for receiving the threaded portion of the screw 15, a recess around the periphery of the through-hole for accommodating the screw head, and are formed so that the top surface of the fixing disk 14 and the top surface of the screw head are approximately flush with each other. The outer diameter of the disk-shaped member constituting the fixing disk 14 is preferably 5 to 150 mm, more preferably 10 to 100 mm, and even more preferably 20 to 90 mm. The thickness of the disk-shaped member is preferably 0.05 to 10 mm, more preferably 0.1 to 5 mm, and even more preferably 0.3 to 3 mm. The thickness of the disk-shaped member does not need to be uniform; it may have a stepped shape, with the center being thicker and the periphery being thinner. The dimensions of the through-hole and recess are determined based on the screw to be used. The material constituting the fixing disks 14 is not limited, but examples thereof include iron, copper, stainless steel, brass, aluminum, magnesium, titanium, zinc, and composites or plated products thereof, with stainless steel being preferred. The method of distributing the fixing disks 14 is not limited, but they can be arranged at regular intervals both vertically and horizontally, such as in a checkerboard pattern. In this case, the intervals are preferably 100 to 2500 mm, more preferably 200 to 2000 mm, and even more preferably 300 to 1500 mm.

[0033] The screws 15 may be any screws that have been conventionally used in the mechanical fixing method for waterproofing sheets. The screws 15 fix the fixing disk 14 to the roof substrate 11.

[0034] The screw fall-out prevention plate 1 is placed on the fixing disk 14, and the protrusion 3 of the screw fall-out prevention plate is inserted non-rotatably into the recess of the screw 15. As described above, the screw fall-out prevention plate 1 is prevented from rotating, and therefore, by having the protrusion 3 of the screw fall-out prevention plate inserted non-rotatably into the recess of the screw 15, it is possible to prevent the screw 15 from rotating. The screw fall-out prevention plate 1 is preferably smaller than the fixing disk 14. The screw fall-out prevention plate 1 may be fixed to the fixing disk 14. If the screw fall-out prevention plate 1 has an adhesive layer or an adhesive layer, the screw fall-out prevention plate 1 can be fixed to the fixing disk 14 by the adhesive layer or the adhesive layer.

[0035] Waterproof sheet 13 covers roof underlayment 11, fixing disk 14, and screw-removal prevention plate 1. Waterproof sheet 13 may be made of, but is not limited to, a polyvinyl chloride resin sheet, a vulcanized rubber sheet, a non-vulcanized rubber sheet, a thermoplastic elastomer sheet, a thermoplastic polyurethane elastomer sheet, an ethylene vinyl acetate resin sheet, or an asphalt roofing sheet. The thickness of waterproof sheet 13 is not limited, but is preferably 0.3 to 10 mm, more preferably 0.5 to 5 mm, and even more preferably 1 to 3 mm.

[0036] The waterproof sheet 13 does not necessarily have to be fixed to the screw fall-out prevention plate 1 or the fixing disk 14, but may be fixed to the screw fall-out prevention plate 1, or may be fixed to the screw fall-out prevention plate 1 and the fixing disk 14. The waterproof sheet 13 does not necessarily have to be fixed to the fixing disk 14 from the standpoint of preventing screws from rotating, but it is preferable from the standpoint of a waterproof structure that it be fixed. The screw fall-out prevention plate 1 does not necessarily have to be fixed to the fixing disk 14, but may be fixed.

[0037] The method for fastening the waterproof sheet 13 to the screw removal prevention plate 1 and the fixing disk 14 is not limited, but may be fusion bonding by electromagnetic induction, adhesion with an adhesive, or the like.

[0038] FIG. 3 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (III). The present invention (III) is a waterproof sheet fixing structure 10 comprising a roof underlayment 11, insulation material 12 provided on the roof underlayment, fixing discs 14 scattered on the insulation material, screws 15 for fixing the fixing discs and insulation material to the roof underlayment, and a waterproof sheet 13 covering the insulation material and the fixing discs, wherein the waterproof sheet fixing structure 10 further comprises a screw slip-out prevention plate 1 of the present invention (I), the screw slip-out prevention plate 1 is arranged on the fixing disc 14, and the protrusion 3 of the screw slip-out prevention plate is inserted non-rotatably into the recess of the screw 15.

[0039] The fixing structure of the waterproof sheet of the present invention (III) corresponds to an embodiment in which a heat insulating material is used in a so-called pre-cast construction method. The present invention (III) differs from the present invention (II) in that the present invention (III) includes a heat insulating material 12, whereas the present invention (II) does not include a heat insulating material 12. Otherwise, the two are the same.

[0040] A thermal insulator 12 is provided on the roof underlayment 11. Examples of the thermal insulator 12 include, but are not limited to, rigid urethane foam, polystyrene foam, phenolic foam, glass wool, rock wool, pressed wool, carbonized cork, and cellulose fiber. The thickness of the thermal insulator 12 is not limited, but is preferably 5 to 300 mm, more preferably 10 to 200 mm, and even more preferably 20 to 150 mm.

[0041] Fixing disks 14 are interspersed on the insulating material 12 .

[0042] FIG. 4 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (IV). The present invention (IV) is a waterproof sheet fixing structure 10 comprising a roof underlayment 11, a waterproof sheet 13 placed on the roof underlayment, fixing discs 14 scattered on the waterproof sheet, screws 15 for fixing the fixing discs and the waterproof sheet to the roof underlayment, and a waterproof patch 16 for covering the fixing discs, and is characterized in that the waterproof sheet fixing structure 10 further comprises a screw slippage prevention plate 1 of the present invention (I), which is arranged on the fixing disc 14 and the protrusion 3 of the screw slippage prevention plate is inserted into the recess of the screw 15 so as not to rotate.

[0043] The waterproof sheet fixing structure of the present invention (IV) corresponds to an embodiment of the so-called post-cast construction method in which no heat insulating material is used.

[0044] In a sheet waterproofing mechanical fixing method using a metal-based roofing material as roof underlayment 11, screws 15 tend to loosen from roof underlayment 11 and rotate as they come out due to the effects of wind vibrations, but screw fallout prevention plate 1, which has protrusion 3 that can be inserted non-rotatably into the recess of screw 15, is placed on top of fixing disk 14 and screw 15, and with protrusion 3 of the screw fallout prevention plate inserted non-rotatably into the recess of screw 15, screw fallout prevention plate 1, fixing disk 14, and part of waterproof sheet 13 are covered with waterproof patch 16, thereby preventing screw 15 from rotating. Screw fallout prevention plate 1 may or may not be fixed to waterproof patch 16 and / or fixing disk 14. Even if the screw fall-out prevention plate 1 is not fixed to either the waterproof patch 16 or the fixing disk 14, as long as the waterproof patch 16 is fixed to the waterproof sheet 13, the screw fall-out prevention plate 1 is sandwiched and pressed between the waterproof patch 16 and the fixing disk 14, and therefore the rotation of the screw fall-out prevention plate 1 is suppressed by frictional force, and as a result, the rotation of the screw 15 is prevented.

[0045] A waterproof sheet 13 is provided on top of the roof substrate 11.

[0046] Fixing discs 14 are arranged at intervals on the waterproof sheet. The fixing discs 14 may be any discs that have been conventionally used in the waterproof sheet mechanical fixing method. The fastening disc 14 need not be, but may be, attached to the tarpaulin.

[0047] The screws 15 can be any screws that have been conventionally used in the mechanical fixing method for waterproofing sheets. The screws 15 fix the fixing disk 14 and the waterproof sheet 13 to the roof substrate 11.

[0048] The waterproof patch 16 may be one that has been conventionally used in sheet waterproofing mechanical fixing methods. The waterproof patch 16 preferably has a disk shape. The outer diameter of the waterproof patch 16 is preferably 100 to 350 mm, more preferably 110 to 300 mm, and even more preferably 120 to 250 mm. The thickness of the waterproof patch 16 is preferably 0.3 to 10 mm, more preferably 0.5 to 5 mm, and even more preferably 1 to 3 mm. The material constituting the waterproof patch 16 is not limited, but examples include vulcanized rubber sheets, non-vulcanized rubber sheets, thermoplastic elastomer sheets, thermoplastic polyurethane elastomer sheets, ethylene vinyl acetate resin sheets, asphalt roofing sheets, and polyvinyl chloride resin sheets. The waterproof patch 16 is larger than the fixing disk 14 and completely covers the screw fall prevention plate 1 and the fixing disk 14, with the portion of the waterproof patch 16 that protrudes from the fixing disk 14 being affixed to the waterproof sheet 13. The waterproof patch 16 does not necessarily have to be affixed to the fixing disk 14, but it may be affixed. The method for affixing the waterproof patch 16 to the screw fall prevention plate 1, the fixing disk 14, and the waterproof sheet 13 is not limited, but it can be affixed by adhesive, pressure-sensitive adhesive, welding, or fusion. If the waterproof patch is a sheet of vulcanized rubber or thermoplastic elastomer, it is preferably affixed by adhesive or pressure-sensitive adhesive. If the waterproof patch is a vinyl chloride resin sheet, it is preferably affixed by welding or fusion.

[0049] The screw fall-out prevention plate 1 is placed on the fixing disk 14, and the protrusion 3 of the screw fall-out prevention plate is inserted non-rotatably into the recess of the screw 15. As described above, the screw fall-out prevention plate 1 is prevented from rotating, and therefore, by having the protrusion 3 of the screw fall-out prevention plate inserted non-rotatably into the recess of the screw 15, it is possible to prevent the screw 15 from rotating. The screw fall-out prevention plate 1 is preferably smaller than the fixing disk 14. The screw fall-out prevention plate 1 may be fixed to the fixing disk 14. If the screw fall-out prevention plate 1 has an adhesive layer or an adhesive layer, the screw fall-out prevention plate 1 can be fixed to the fixing disk 14 by the adhesive layer or the adhesive layer.

[0050] FIG. 5 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (V). The present invention (V) is a waterproof sheet fixing structure 10 comprising a roof underlayment 11, insulation material 12 placed on the roof underlayment, a waterproof sheet 13 placed on the insulation material, fixing discs 14 scattered on the waterproof sheet, screws 15 for fixing the fixing discs, waterproof sheet and insulation material to the roof underlayment, and a waterproof patch 16 for covering the fixing discs, and is characterized in that the waterproof sheet fixing structure 10 further comprises a screw slippage prevention plate 1 of the present invention (I), which is arranged on the fixing disc 14 and the protrusion 3 of the screw slippage prevention plate is inserted into the recess of the screw 15 so as not to rotate.

[0051] The fixing structure of the waterproof sheet of the present invention (V) corresponds to an embodiment in which a heat insulating material is used by the so-called post-installation method. The present invention (V) differs from the present invention (IV) in that the present invention (V) includes the insulating material 12, whereas the present invention (IV) does not include the insulating material 12. Otherwise, the two are the same.

[0052] A heat insulating material 12 is provided between the roof substrate 11 and the waterproof sheet 13.

[0053] The present invention (VI) is dotting the fixing discs 14 on the roof substrate 11; a step of fixing the fixing disk 14 to the roof substrate 11 with a screw 15; a step of placing the screw slip-out prevention plate 1 of the present invention (I) on the fixing disk 14 and inserting the protrusion 3 of the screw slip-out prevention plate into the recess of the screw 15 so that it cannot rotate; A process of covering the fixing disk 14 and the screw removal prevention plate 1 with a waterproof sheet 13 A method for fastening a waterproof sheet, including:

[0054] The method for fixing a waterproof sheet according to the present invention (VI) corresponds to an embodiment of the so-called pre-casting method in which no heat insulating material is used.

[0055] The method for scattering the fixing discs 14 on the roof substrate 11 is not particularly limited, and any method conventionally used in sheet waterproofing mechanical fixing construction methods can be used.

[0056] The method of fixing the fixing disk 14 to the roof substrate 11 with the screws 15 is not particularly limited, and any method conventionally used in sheet waterproofing mechanical fixing construction methods can be used.

[0057] The method for inserting the protrusion 3 of the screw slip-out prevention plate 1 into the recess of the screw 15 so that it cannot rotate is to simply insert the protrusion 3 into the recess of the screw if the protrusion 3 has a shape that fits into the recess of the screw so that it cannot rotate, but if the protrusion 3 does not have a shape that allows it to fit, the protrusion 3 can be fixed to the recess of the screw using an adhesive or the like.

[0058] In the process of placing the screw fall-out prevention plate 1 on the fixing disk 14 and inserting the protrusions 3 of the screw fall-out prevention plate 1 into the recesses of the screws 15 so that the plate cannot rotate, the screw fall-out prevention plate 1 may be fixed to the fixing disk 14. The fixing method is not limited, but the plate can be fixed using an adhesive or a pressure-sensitive adhesive.

[0059] The method for covering the fixing disk 14 and the screw fallout prevention plate 1 with the waterproof sheet 13 is not particularly limited, and any conventional method for covering the fixing disk 14 with the waterproof sheet 13 in sheet waterproofing mechanical fixing methods can be used. The waterproof sheet 13 may be fixed to the screw fallout prevention plate 1, or may be fixed to the screw fallout prevention plate 1 and the fixing disk 14. The screw fallout prevention plate 1 does not necessarily have to be fixed to the fixing disk 14, but may be fixed thereto. Fixing can be performed, for example, by fusion using electromagnetic induction or bonding with an adhesive.

[0060] Screw 15 can be prevented from rotating by placing screw fall prevention plate 1 on top of fixing disk 14 and screw 15, inserting protrusion 3 of screw fall prevention plate 1 into the recess of screw 15 so that it cannot rotate, and covering fixing disk 14 and screw fall prevention plate 1 with waterproof sheet 13. Screw fall prevention plate 1 may or may not be fixed to waterproof sheet 13 and / or fixing disk 14. Even if screw fall prevention plate 1 is not fixed to either waterproof sheet 13 or fixing disk 14, screw fall prevention plate 1 is sandwiched and pressed between waterproof sheet 13 and fixing disk 14, so frictional force will prevent rotation of screw fall prevention plate 1, and as a result, screw 15 will not rotate.

[0061] The present invention (VII) is A step of laying a heat insulating material 12 on the roof substrate 11; dotting the insulation material 12 with fastening discs 14; a step of fixing the fixing disk 14 and the heat insulating material 12 to the roof substrate 11 with screws 15; a step of placing the screw slip-out prevention plate 1 of the present invention (I) on the fixing disk 14 and inserting the protrusion 3 of the screw slip-out prevention plate into the recess of the screw 15 so that it cannot rotate; A process of covering the heat insulating material 12, the fixing disk 14 and the screw removal prevention plate 1 with a waterproof sheet 13. A method for fastening a waterproof sheet, including:

[0062] The method for fixing a waterproof sheet according to the present invention (VII) corresponds to an embodiment in which a heat insulating material is used in a so-called pre-cast construction method. The present invention (VII) differs from the present invention (VI) in that the present invention (VII) includes a step of laying the insulating material 12 on the roof substrate 11, whereas the present invention (VI) does not include this step. Otherwise, the two are the same.

[0063] The present invention (VIII) is A step of laying a waterproof sheet 13 on the roof substrate 11; dotting the waterproof sheet 13 with fixing discs 14; a step of fixing the fixing disk 14 and the waterproof sheet 13 to the roof substrate 11 with screws 15; a step of placing the screw slip-out prevention plate 1 of the present invention (I) on the fixing disk 14 and inserting the protrusion 3 of the screw slip-out prevention plate 1 into the recess of the screw 15 so that it cannot rotate; A process of covering the fixing disk 14 and the screw removal prevention plate 1 with a waterproof patch 16 A method for fastening a waterproof sheet, including:

[0064] The method for fixing a waterproof sheet according to the present invention (VIII) corresponds to an embodiment in which there is no heat insulating material, which is a so-called post-casting method.

[0065] The method for laying the waterproof sheet 13 on the roof substrate 11 is not particularly limited, and any conventional method commonly used in sheet waterproofing mechanical fixing construction methods can be used.

[0066] There are no particular limitations on the method for dotting the fixing discs 14 on the waterproof sheet 13, and any conventional method commonly used in sheet waterproofing mechanical fixing methods can be used. There are no limitations on the location of the dots, but they can be placed at regular intervals vertically and horizontally, like a checkerboard pattern, for example. The fixing discs 14 do not need to be fixed to the waterproof sheet 13, but may be.

[0067] The method of fixing the fixing disk 14 and the waterproof sheet 13 to the roof substrate 11 with the screws 15 is not particularly limited, and any method conventionally used in mechanical fixing methods for waterproofing sheets can be used.

[0068] In the process of placing the screw fall-out prevention plate 1 on the fixing disk 14 and inserting the protrusions 3 of the screw fall-out prevention plate 1 into the recesses of the screws 15 so that they cannot rotate, the screw fall-out prevention plate 1 does not need to be fixed to the fixing disk 14, but may be fixed to the fixing disk 14. The method of fixing is not limited, but it can be fixed using an adhesive or a pressure-sensitive adhesive.

[0069] The method for covering the fixing disk 14 and screw fall prevention plate 1 with the waterproof patch 16 can be the same as the conventional method for covering the fixing disk 14 with the waterproof patch 16 in sheet waterproofing mechanical fixing methods. The waterproof patch 16 is larger than the fixing disk 14 and the screw fall prevention plate 1, and is designed to completely cover the screw fall prevention plate 1 and the fixing disk 14. The portion of the waterproof patch 16 that protrudes from the fixing disk 14 is fixed to the waterproof sheet 13. The waterproof patch 16 does not need to be fixed to the fixing disk 14, but may be fixed thereto. The method for fixing the waterproof patch 16 to the screw fall prevention plate 1, the fixing disk 14, and the waterproof sheet 13 is not limited, but it can be fixed using an adhesive or pressure-sensitive adhesive.

[0070] Screw backout prevention plate 1 is placed on fixing disk 14 and screw 15, and with protrusion 3 of the screw backout prevention plate inserted non-rotatably into the recess of screw 15, by covering part of screw backout prevention plate 1, fixing disk 14, and waterproof sheet 13 with waterproof patch 16, it is possible to prevent screw 15 from rotating. Screw backout prevention plate 1 may or may not be fixed to waterproof patch 16 and / or fixing disk 14. Even if screw backout prevention plate 1 is not fixed to either waterproof patch 16 or fixing disk 14, as long as waterproof patch 16 is fixed to waterproof sheet 13, screw backout prevention plate 1 will be sandwiched and pressed between waterproof patch 16 and fixing disk 14, and friction will prevent rotation of screw backout prevention plate 1, thereby preventing screw 15 from rotating.

[0071] The present invention (IX) is A step of laying a heat insulating material 12 on the roof substrate 11; A step of laying a waterproof sheet 13 on the heat insulating material 12; dotting the waterproof sheet 13 with fixing discs 14; a step of fixing the fixing disk 14, the waterproof sheet 13 and the heat insulating material 12 to the roof substrate 11 with screws 15; a step of placing the screw slip-out prevention plate 1 of the present invention (I) on the fixing disk 14 and inserting the protrusion 3 of the screw slip-out prevention plate into the recess of the screw 15 so that it cannot rotate; A process of covering the fixing disk 14 and the screw removal prevention plate 1 with a waterproof patch 16 A method for fastening a waterproof sheet, including:

[0072] The method for fixing the waterproof sheet of the present invention (IX) corresponds to an embodiment in which a heat insulating material is used in the so-called post-cast construction method. The present invention (IX) differs from the present invention (VIII) in that the present invention (IX) includes a step of laying the insulation material 12 on the roof substrate 11, whereas the present invention (VIII) does not include this step. Otherwise, the two are the same.

[0073] The method for laying the heat insulating material 12 on the roof substrate 11 is not particularly limited, and any method conventionally used in sheet waterproofing mechanical fixing construction methods can be used.

[0074] The present invention (X) is a waterproof patch used in a sheet waterproofing mechanical fixing method in which a waterproof sheet is fixed with screws, and the waterproof patch is a waterproof patch with protrusions that can be inserted into the recesses of the screws so that they cannot rotate. FIG. 6 is a projection view (front view and bottom view) of the waterproof patch with protrusions of the present invention (X), where FIG. 6(a) is a front view and FIG. 6(b) is a bottom view. The waterproof patch 4 with protrusions has a plate-shaped portion 5 and a protrusion 6 provided on one surface of the plate-shaped portion, and the protrusion 6 can be inserted into the recess of the screw so as not to be rotatable.

[0075] The external shape of the plate-like portion 5 of the waterproof patch 4 with protrusions is not limited, and may be a circle, an ellipse, a square, a rectangle, a regular hexagon, a regular octagon, or any other polygon. The external shape of the plate-shaped portion 5 of the waterproof patch 4 with protrusions is not limited to the shape shown in FIG. 6 (that is, circular). The outer shape of the plate-shaped portion 5 of the waterproof patch 4 with protrusions is preferably circular. That is, the plate-shaped portion 5 preferably has a disk shape. When the outer shape of the plate-shaped portion 5 is circular, that is, when the plate-shaped portion 5 has a disk shape, the outer diameter D of the plate-shaped portion 5 is preferably 100 to 350 mm, more preferably 110 to 300 mm, and even more preferably 120 to 250 mm. The thickness T of the plate-like portion 5 is not limited, but is preferably 0.3 to 10 mm, more preferably 0.5 to 5 mm, and even more preferably 1 to 3 mm.

[0076] The protrusions 6 of the waterproof patch 4 with protrusions can be inserted into the screw recesses so that they cannot rotate. Here, "inserted so that they cannot rotate" means that after the protrusions 6 are inserted into the screw recesses, the screw slipout prevention plate 1 with the protrusions 6 and the screw with the recess cannot rotate independently of each other. In this case, the protrusions may become non-rotatable simply by being inserted, or they may be made non-rotatable by performing another process in addition to the insertion. The shape of the protrusions 6 is not limited as long as the protrusions 6 can be inserted into the screw recesses so that they cannot rotate. Here, the shape of the protrusion 6 refers to the shape shown in the bottom view, that is, the shape as seen from below. An example of the shape of the protrusion 6 is a shape that fits non-rotatably into the recess of a screw. The shape that fits non-rotatably into the recess of the screw may be, but is not limited to, a triangle, a rectangle (such as a square), a hexagon, a cross, a minus sign, a star-shaped hexagon, or a combination thereof. Since the protrusions 6 of the protrusion-equipped waterproof patch 4 in Figure 6 are square in shape, this protrusion-equipped waterproof patch can be used when the screw recess is a square hole. Conversely, if the protrusions 6 of the protrusion-equipped waterproof patch are square in shape, screws with square hole recesses can be used. The shape of the protrusion 6 is not limited to the shape shown in FIG. 6 (that is, a square). The recess of the screw may be a square hole, a hexagonal hole, a cross recess, a slot, a plus / minus, a hexalobular, or a combination thereof (such as a composite shape of a square hole and a cross recess), and the shape of the protrusion 6 is selected accordingly. When the screw recess is a square hole, the shape of the protrusion 6 is preferably square. When the recess of the screw is a hexagonal socket, the shape of the protrusion 6 is preferably hexagonal. When the recess of the screw is a cross recess, the shape of the protrusion 6 is preferably a cross shape. When the recess of the screw is a slot, the shape of the protrusion 6 is preferably a minus shape. When the recess of the screw is a plus or minus, the shape of the protrusion 6 is preferably a cross shape. If the screw recess is hexalobular, the shape of the projection 6 is preferably star-shaped hexagonal. However, the shape of the protrusion does not have to be the same as the shape of the recess. Another example of the shape of the protrusion 6 is a shape that can fix the two opposing vertices where the diagonal of the screw recess is at its maximum. For example, if the recess is a square hole, the protrusion does not need to be square, but can be a slotted shape with the same size as the diagonal of the square recess to prevent rotation. In other words, as long as the two opposing vertices where the diagonal of the recess is at its maximum are fixed, rotation can be prevented not only with a slotted shape but also with two protrusions. Alternatively, the protrusion 6 may be inserted into a recess of a screw and fixed to the screw with an adhesive or the like. In this case, the protrusion 6 may have any shape as long as it can be inserted into the recess of the screw. For example, if the recess of the screw is rectangular, the protrusion 6 may be biased to one side of the rectangle and fixed with an adhesive or the like. The protrusion 6 preferably has a shape that fits non-rotatably into the recess of the screw.

[0077] The height H of the projections 6 of the waterproof patch 4 with projections is selected depending on the depth of the screw recess, but is preferably 0.1 to 10 mm, more preferably 0.3 to 7.5 mm, and even more preferably 0.5 to 5 mm.

[0078] The material for forming the protruding waterproof patch 4 is not limited, but any material conventionally used to form waterproof patches in sheet waterproofing mechanical fixing methods can be used. The material for forming the protruding waterproof patch 4 is preferably resin. The resin can be either a thermoplastic resin or a thermosetting resin, and specific examples include polyethylene, polypropylene, polybutylene terephthalate, polyethylene terephthalate, vinyl chloride resin, polystyrene, ABS resin, AS resin, acrylic resin, phenolic resin, urea resin, melamine resin, alkyd resin, polyester, epoxy resin, polyurethane, diallyl phthalate resin, silicone resin, and modified silicone resin. However, vinyl chloride resin (rigid vinyl chloride resin or flexible vinyl chloride resin) is preferred. Forming the patch from vinyl chloride resin provides excellent processability, durability, and water resistance. The plate-like portion 5 and the protrusions 6 of the waterproof patch 4 with protrusions may be made of the same material or different materials, but are preferably made of the same material.

[0079] There are no particular limitations on the method for producing the waterproof patch with protrusions, but the waterproof patch with protrusions can be produced by integrally molding the resin using injection molding or the like, or by separately adding the protrusions.

[0080] FIG. 7 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (XI). The present invention (XI) is a waterproof sheet fixing structure comprising a roof underlayment 11, a waterproof sheet 13 placed on the roof underlayment, fixing discs 14 scattered on the waterproof sheet, screws 15 for fixing the fixing discs and the waterproof sheet to the roof underlayment, and a waterproof patch 4 covering the fixing discs, characterized in that the waterproof patch 4 has a protrusion 6 that can be non-rotatably inserted into the recess of the screw 15, the protrusion 6 of the waterproof patch is non-rotatably inserted into the recess of the screw 15, and the waterproof patch 4 is fixed to the fixing disc 14 and the waterproof sheet 13.

[0081] The fixing structure of the waterproof sheet of the present invention (XI) corresponds to an embodiment of the so-called post-cast construction method in which no heat insulating material is used.

[0082] In a sheet waterproofing mechanical fixing method using a metal-based roofing material as the roof underlayment 11, the screws 15 tend to loosen from the roof underlayment 11 and rotate out due to the effects of wind vibrations, but rotation of the screws 15 can be prevented by placing a waterproof patch 4 (i.e., a waterproof patch with protrusions) 4 having protrusions 6 that can be inserted non-rotatably into the recesses of the screws 15 on top of the fixing disk 14 and the screws 15, and fastening the waterproof patch with protrusions 4 to the waterproof sheet 13 with the protrusions 6 of the waterproof patch 4 inserted non-rotatably into the recesses of the screws 15. From the standpoint of preventing screw rotation, the waterproof patch 4 does not need to be fastened to the fixing disk 14, but from the standpoint of waterproof structure, it is preferable that the waterproof patch 4 be fastened to the fixing disk 14.

[0083] FIG. 8 is a cross-sectional view of the fixing structure of the waterproof sheet of the present invention (XII). The present invention (XII) is a waterproof sheet fixing structure comprising a roof underlayment 11, insulation material 12 placed on the roof underlayment, a waterproof sheet 13 placed on the insulation material, fixing discs 14 scattered on the waterproof sheet, screws 15 for fixing the fixing discs, waterproof sheet and insulation material to the roof underlayment, and a waterproof patch 4 covering the fixing discs, characterized in that the waterproof patch 4 has a protrusion 6 that can be non-rotatably inserted into the recess of the screw 15, the protrusion 6 of the waterproof patch is non-rotatably inserted into the recess of the screw 15, and the waterproof patch 4 is fixed to the fixing disc 14 and the waterproof sheet 13.

[0084] The fixing structure of the waterproof sheet of the present invention (XII) corresponds to an embodiment in which a heat insulating material is used by the so-called post-installation method. The present invention (XII) differs from the present invention (XI) in that the present invention (XII) includes a heat insulating material 12, while the present invention (XI) does not include a heat insulating material 12. Otherwise, the two are the same. The heat insulating material 12 is provided between the roof underlayment 11 and the waterproof sheet 13.

[0085] The present invention (XIII) is A step of laying a waterproof sheet 13 on the roof substrate 11; dotting the waterproof sheet 13 with fixing discs 14; a step of fixing the fixing disk 14 and the waterproof sheet 13 to the roof substrate 11 with screws 15; The process of covering the fixing disk 14 with the waterproof patch 4 A method for fixing a waterproof sheet, comprising: The waterproof patch (4) has a protrusion (6) that can be inserted into the recess of the screw (15) so as not to rotate. The process of covering the fixing disk 14 with the waterproof patch 4 is characterized by including inserting the protrusion 6 of the waterproof patch into the recess of the screw 15 so that it cannot rotate, and fixing the waterproof patch 4 to the fixing disk 14 and the waterproof sheet 13.

[0086] The method for fixing a waterproof sheet according to the present invention (XIII) corresponds to an embodiment in which there is no heat insulating material, which is a so-called post-casting method.

[0087] The method for laying the waterproof sheet 13 on the roof substrate 11 is not particularly limited, and any conventional method commonly used in sheet waterproofing mechanical fixing construction methods can be used.

[0088] There are no particular limitations on the method for dotting the fixing discs 14 on the waterproof sheet 13, and any conventional method commonly used in sheet waterproofing mechanical fixing methods can be used. There are no limitations on the location of the dots, but they can be placed at regular intervals vertically and horizontally, like a checkerboard pattern, for example. The fixing discs 14 do not need to be fixed to the waterproof sheet 13, but may be.

[0089] The method of fixing the fixing disk 14 and the waterproof sheet 13 to the roof substrate 11 with the screws 15 is not particularly limited, and any method conventionally used in mechanical fixing methods for waterproofing sheets can be used.

[0090] The waterproof patch 4 with protrusions of the present invention (X) can be used as the waterproof patch 4. That is, the waterproof patch 4 has protrusions 6 that can be inserted non-rotatably into the recesses of the screws 15, and the protrusions 6 are the same as the protrusions 6 of the waterproof patch 4 with protrusions of the present invention (X).

[0091] The method for non-rotatably inserting the protrusion 6 of the waterproof patch into the recess of the screw 15 is to simply insert the protrusion 6 into the recess of the screw if the protrusion 6 has a shape that fits non-rotatably into the recess of the screw, but if the protrusion 6 does not have a shape that allows it to fit, the protrusion 6 can be fixed to the recess of the screw using an adhesive or the like.

[0092] The waterproof patch 4 is fixed to the fixing disk 14 and the waterproof sheet 13. By fixing the waterproof patch 4 to the waterproof sheet 13 with the protrusion 6 of the waterproof patch 4 inserted non-rotatably into the recess of the screw 15, it is possible to prevent the screw 15 from rotating. From the viewpoint of preventing the screw from rotating, the waterproof patch 4 does not need to be fixed to the fixing disk 14, but from the viewpoint of waterproof structure, it is preferable that the waterproof patch 4 be fixed to the fixing disk 14.

[0093] Rotation of the screws 15 can be prevented by covering the fixing disk 14 and the screws 15 with the protruding waterproof patch 4 and fastening the protruding waterproof patch 4 to the waterproof sheet 13 with the protrusions 6 of the protruding waterproof patch 4 inserted non-rotatably into the recesses of the screws 15. From the standpoint of preventing screw rotation, it is not necessary to fasten the protruding waterproof patch 4 to the fixing disk 14, but from the standpoint of waterproof structure, it is preferable to fasten the waterproof patch 4 to the fixing disk 14.

[0094] The present invention (XIV) is A step of laying a heat insulating material 12 on the roof substrate 11; A step of laying a waterproof sheet 13 on the heat insulating material 12; dotting the waterproof sheet 13 with fixing discs 14; a step of fixing the fixing disk 14, the waterproof sheet 13 and the heat insulating material 12 to the roof substrate 11 with screws 15; The process of covering the fixing disk 14 with the waterproof patch 4 A method for fixing a waterproof sheet, comprising: The waterproof patch (4) has a protrusion (6) that can be inserted into the recess of the screw (15) so as not to rotate. The process of covering the fixing disc 14 with the waterproof patch 4 is a method of fixing a waterproof sheet, which includes inserting the protrusion 6 of the waterproof patch into the recess of the screw 15 so that it cannot rotate, and fixing the waterproof patch 4 to the fixing disc 14 and the waterproof sheet 13.

[0095] The method for fixing a waterproof sheet according to the present invention (XIV) corresponds to an embodiment in which a heat insulating material is used in a so-called post-cast construction method. The difference between the present invention (XIV) and the present invention (XIII) is that the present invention (XIV) includes a step of laying the insulating material 12 on the roof underlayment 11, while the present invention (XIII) does not include this step. Otherwise, the two are the same. The insulating material 12 is placed between the roof underlayment 11 and the waterproof sheet 13. [Industrial Applicability]

[0096] The screw-removal prevention plate and the waterproof patch with protrusions of the present invention can be suitably used in sheet waterproofing mechanical fixing construction methods. [Explanation of symbols]

[0097] 1 Screw removal prevention plate 2 Plate-shaped part 3 Protrusion 4 Waterproof patches with protrusions 5 Plate-shaped part 6 Protrusion 10 Waterproof sheet fixing structure 11 Roof underlayment 12. Insulation 13. Tarpaulin 14 Fixed disk 15 bis 16 waterproof patches

Claims

1. A screw-removal prevention plate used in a sheet waterproofing mechanical fixing method in which a waterproof sheet is fixed with screws, the screw-removal prevention plate having a plate-shaped portion and a protrusion provided on one surface of the plate-shaped portion, the protrusion being capable of being inserted into the screw recess so as not to rotate.

2. The screw-removal prevention plate according to claim 1 , wherein the plate-shaped portion has a disk shape.

3. 2. The screw-removal prevention plate according to claim 1, wherein the screw-removal prevention plate is made of a core material made of metal or resin, at least a portion of the surface of which is coated with vinyl chloride resin, or is made of vinyl chloride resin, or is made of metal.

4. The screw-removal prevention plate according to claim 1, wherein the screw-removal prevention plate has a pressure-sensitive adhesive layer or an adhesive layer on at least a part of the surface having the protrusions.

5. The screw slippage prevention plate according to claim 1, wherein the shape of the protrusions is a triangle, a square, a hexagon, a cross, a minus sign, a star-shaped hexagon, or a combination thereof.

6. A waterproof sheet fixing structure comprising a roof underlayment, fixing discs scattered on the roof underlayment, screws for fixing the fixing discs to the roof underlayment, and a waterproof sheet covering the fixing discs, wherein the waterproof sheet fixing structure further comprises a screw slippage prevention plate as described in claim 1, the screw slippage prevention plate being positioned on the fixing discs and the protrusions of the screw slippage prevention plate being inserted into the recesses of the screws so as not to rotate.

7. A waterproof sheet fixing structure comprising a roof underlayment, insulation material provided on the roof underlayment, fixing discs scattered on the insulation material, screws for fixing the fixing discs and insulation material to the roof underlayment, and a waterproof sheet covering the insulation material and the fixing discs, wherein the waterproof sheet fixing structure further comprises a screw slippage prevention plate as described in claim 1, the screw slippage prevention plate being positioned on the fixing disc, and the protrusions of the screw slippage prevention plate being inserted into the recesses of the screws so as not to rotate.

8. A waterproof sheet fixing structure comprising a roof underlayment, a waterproof sheet placed on the roof underlayment, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs and the waterproof sheet to the roof underlayment, and a waterproof patch covering the fixing discs, wherein the waterproof sheet fixing structure further comprises a screw slippage prevention plate as described in claim 1, the screw slippage prevention plate being positioned on the fixing disc and the protrusions of the screw slippage prevention plate being inserted into the recesses of the screws so as not to rotate.

9. A waterproof sheet fixing structure comprising a roof underlayment, insulation material placed on the roof underlayment, a waterproof sheet placed on the insulation material, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs, the waterproof sheet and the insulation material to the roof underlayment, and a waterproof patch covering the fixing discs, wherein the waterproof sheet fixing structure further comprises a screw slip-out prevention plate as described in claim 1, wherein the screw slip-out prevention plate is positioned on the fixing disc and the protrusion of the screw slip-out prevention plate is inserted into the recess of the screw so that it cannot rotate.

10. the step of dotting the fixing discs onto the roof underlayment; The process of fixing the fixing disc to the roof substrate with screws. a step of placing the screw slip-out prevention plate according to claim 1 on a fixing disk and inserting the protrusions of the screw slip-out prevention plate into the recesses of the screws so that they cannot rotate; The process of covering the fixing disc and screw removal prevention plate with a waterproof sheet. How to secure the tarp, including:

11. The process of laying insulation on the roof substrate, dotting the insulation with fixing discs; A process of fixing the fixing disc and insulation material to the roof substrate with screws; a step of placing the screw slip-out prevention plate according to claim 1 on a fixing disk and inserting the protrusions of the screw slip-out prevention plate into the recesses of the screws so that they cannot rotate; The process of covering the insulation material, fixing discs and screw removal prevention plates with waterproof sheets. How to secure the tarp, including:

12. The process of laying a waterproof sheet on the roof substrate, dotting the tarpaulin with fixing discs; A process of fixing the fixing disk and waterproof sheet to the roof substrate with screws. a step of placing the screw slip-out prevention plate according to claim 1 on a fixing disk and inserting the protrusions of the screw slip-out prevention plate into the recesses of the screws so that they cannot rotate; The process of covering the fixing disc and screw removal prevention plate with a waterproof patch. How to secure the tarp, including:

13. The process of laying insulation on the roof substrate, A process of laying a waterproof sheet on top of the insulation material; dotting the tarpaulin with fixing discs; The process of fixing the fixing disk, waterproof sheet and insulation material to the roof substrate with screws. a step of placing the screw slip-out prevention plate according to claim 1 on a fixing disk and inserting the protrusions of the screw slip-out prevention plate into the recesses of the screws so that they cannot rotate; The process of covering the fixing disc and screw removal prevention plate with a waterproof patch. How to secure the tarp, including:

14. A waterproof patch used in a sheet waterproofing mechanical fixing method in which a waterproof sheet is fixed with screws, the waterproof patch having a protrusion that can be inserted into the recess of the screw so that it cannot rotate.

15. A waterproof sheet fixing structure comprising a roof underlayment, a waterproof sheet placed on the roof underlayment, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs and the waterproof sheet to the roof underlayment, and a waterproof patch covering the fixing discs, wherein the waterproof patch has a protrusion that can be non-rotatably inserted into the recess of the screw, the protrusion of the waterproof patch is non-rotatably inserted into the recess of the screw, and the waterproof patch is fixed to the fixing disc and the waterproof sheet.

16. A waterproof sheet fixing structure comprising a roof underlayment, insulation material placed on the roof underlayment, a waterproof sheet placed on the insulation material, fixing discs scattered on the waterproof sheet, screws for fixing the fixing discs, the waterproof sheet and the insulation material to the roof underlayment, and a waterproof patch covering the fixing discs, wherein the waterproof patch has a protrusion that can be non-rotatably inserted into the recess of the screw, the protrusion of the waterproof patch is non-rotatably inserted into the recess of the screw, and the waterproof patch is fixed to the fixing disc and the waterproof sheet.

17. The process of laying a waterproof sheet on the roof substrate, dotting the tarpaulin with fixing discs; A process of fixing the fixing disk and the waterproof sheet to the roof substrate with screws; The process of covering the fixing disc with a waterproof patch A method for fixing a waterproof sheet, comprising: The waterproof patch has a protrusion that can be inserted into the recess of the screw so that it cannot rotate, The method for fixing a waterproof sheet includes the step of covering the fixing disk with a waterproof patch by inserting the protrusion of the waterproof patch into the recess of the screw so that the waterproof patch cannot rotate, and fixing the waterproof patch to the fixing disk and the waterproof sheet.

18. The process of laying insulation on the roof substrate, A process of laying a waterproof sheet on top of the insulation material; dotting the tarpaulin with fixing discs; A process of fixing the fixing disk, waterproof sheet and insulation material to the roof substrate with screws; The process of covering the fixing disc with a waterproof patch A method for fixing a waterproof sheet, comprising: The waterproof patch has a protrusion that can be inserted into the recess of the screw so that it cannot rotate, The method for fixing a waterproof sheet includes the step of covering the fixing disk with a waterproof patch by inserting the protrusion of the waterproof patch into the recess of the screw so that the waterproof patch cannot rotate, and fixing the waterproof patch to the fixing disk and the waterproof sheet.

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