JP2018123593A - Fixing structure for waterproof sheet and fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing structure for a waterproof sheet and a fixture capable of preventing the fixture from loosening through repeated vibration caused by fluttering of the water sheet.SOLUTION: A fixing structure for a waterproof sheet is provided with a fixing plate arranged on a waterproof substrate; a fixing screw securely attached to the waterproof substrate passing through the fixing plate; and a waterproof sheet laid on the waterproof substrate and fixed with a fixture consisting of the fixing plate and the fixing screw, wherein the fixing plate is provided with a counterbore hole capable of receiving a head of the fixing screw and wherein a back surface of the head of the fixing screw abutting with the counterbore hole is provided with irregularity.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a waterproof sheet fixing structure in a waterproof structure such as a rooftop, a roof, and a veranda and a fixture used therefor.

  Conventionally, as a waterproofing method for rooftops, verandas, flat roofs, etc., a waterproof sheeting method using a waterproof sheet has been carried out. Among them, the waterproof sheet is partially fixed to the ground using a fixing plate and a fixing member. The mechanical fixing method is generally adopted because of its workability, regardless of the type of groundwork, new construction or refurbishment.

  Examples of waterproof bases for providing a waterproof structure include concrete bases, metal bases, lightweight foamed concrete (ALC), steel materials, and wood materials. The mechanical fixing method as described above is applied to any waterproof base. In many cases, the metal base is thinner than other waterproof bases, and in this case, screws used as fixing members for the fixing member of the waterproof sheet are fixed in a state of penetrating the metal base.

  Here, in the waterproof structure constructed by the mechanical fixing method, there is a phenomenon called fluttering in which the waterproof sheet between the fixtures is lifted and waved by the negative pressure of the wind, thereby fixing the sheet to the base. Since the upward force is applied to the screw and the force is applied in the lateral direction, the metal base part around the screw hole becomes fatigued, and the screw hole fixed to the base expands and eventually the screw is pulled out. sell.

  On the other hand, Patent Document 1 is provided with a fixture composed of a frame and a fixing member as an aim of a stable fixing function without causing material fatigue in the fixing portion due to the shaking of the fixture, An exterior structure is disclosed, in which the frame body penetrates an exterior member such as a waterproof sheet, and the lower end portion of the exterior member and the frame body is fixed to the surface of the base material by a fixing member such as a screw.

JP 2008-150794 A

  In such an exterior structure, since a fixing member such as a screw is driven into the frame, the width of shaking of the fixing device in the lateral direction is limited, thus preventing material fatigue of the fixing portion in the waterproof base. Is possible.

  However, the cause of screw dropout in a waterproof structure constructed on such a metal base by a mechanical fixing method is not only due to material fatigue around the screw hole due to rolling of the fixture, but also to the fixture. It has been found that some screws are gradually loosened by repeated vibrations.

  Therefore, the present invention has been made in consideration of the above points, and provides a waterproof sheet fixing structure capable of preventing the fixing tool from being loosened by repeated vibration caused by fluttering of the waterproof sheet, and a fixing tool used therefor. For the purpose.

  The gist of the present invention is that a fixture comprising a fixing plate and a fixing member is provided with unevenness on the contact surface between the fixing plate and the fixing member.

  More specifically, a fixing plate disposed on the waterproof base, a fixing screw penetrating the fixing plate and fastened to the waterproof base, and a fixing plate and fixing screw laid on the waterproof base. A fixing sheet, and a fixing plate having a countersink that can store a screw head of a fixing screw. It is a waterproof sheet fixing structure provided.

  The fixing plate is disposed on the waterproof base, the fixing screw that passes through the fixing plate and is fixed to the waterproof base, and the fixing plate that is laid on the waterproof base and includes the fixing plate and the fixing screw. A fixing sheet, a fixing plate having a countersink that can store a screw head of a fixing screw, and a surface that contacts the screw head on the surface of the countersink is uneven. It has a waterproof sheet fixing structure.

  Further, a fixing plate disposed on the waterproof base, a fixing screw penetrating the fixing plate and fastened to the waterproof base, and laid on the waterproof base and the fixing plate and the fixing A waterproof sheet fixed by a fixing tool made of a screw for fixing, and the fixing plate has a countersink that can store a screw head of the fixing screw. Concavities and convexities are provided on the abutting surface, and concavities and convexities are provided on the surface of the countersink that contacts the screw head, and the concavities and convexities provided on the back surface of the screw head and the countersink surface are provided. It is a waterproof sheet fixing structure corresponding to the unevenness.

By adopting such a waterproof sheet fixing structure, the frictional resistance of the contact surface (the back surface of the screw head and the surface of the countersink) between the fixing plate, which is a fixing tool in a state where the waterproof sheet is fixed, and the fixing screw is increased. Further, it is possible to prevent the fixing screw from loosening when an upward force is applied to the fixing portion due to fluttering of the waterproof sheet or the like. In the case where the unevenness provided on the back surface of the screw head and the unevenness provided on the surface of the countersink are applied to each other, an effect of preventing rotation due to the application is obtained in addition to the frictional resistance.
In the waterproof sheet fixing structure in which the surface of the fixed plate facing the screw head on the surface of the countersink or the surface of the screw head on the back of the screw head that is in contact with the countersink is covered with a resin layer, the friction resistance of the contact surface is further increased. It becomes larger and the loosening prevention effect is improved.

  The fixing plate is composed of a fixing plate and fixing screws, and is used to fix the waterproof sheet on the waterproof base. The fixing plate accommodates the through hole through which the fixing screw passes and the screw head of the fixing screw. A waterproof sheet fixing tool provided with unevenness on the surface of the screw head that contacts the countersink, or the surface of the countersink that has contact with the screw head. It is the provided waterproof sheet fixing tool.

  Further, the fixing plate is composed of a fixing plate and a fixing screw, and is a fixing tool for fixing the waterproof sheet on the waterproof base. The fixing plate has a through hole through which the fixing screw passes and a screw head of the fixing screw. The back surface of the screw head is provided with an unevenness on the surface that contacts the countersink on the back surface of the screw head, and the uneven surface is provided on the surface that contacts the screw head on the surface of the countersink. It is a waterproof sheet fixture which corresponds so that the unevenness | corrugation provided in and the unevenness | corrugation provided in the surface of the countersink may overlap.

  According to the present invention, in the waterproof structure in which the waterproof sheet is constructed by the mechanical fixing method, the fixing tool can be prevented from loosening due to repeated vibration caused by the fluttering of the waterproof sheet, and a stable waterproof sheet fixing structure can be obtained. In addition, it is possible to prevent screw slip-out that is a concern in metal bases.

It is sectional drawing which shows 1st Embodiment of the waterproof sheet fixing structure of this invention. It is an enlarged view of the fixing | fixed part of the waterproof sheet fixing structure of FIG. It is explanatory drawing of the fixing screw which is a fixing tool of this invention. It is the top view which looked at the screw for fixing of the present invention from the lower end direction of the axis. It is a perspective view of the fixing plate which is a fixing tool of this invention. It is the top view which looked at the fixing plate which is a fixing tool of this invention from the upper surface direction. It is an enlarged view of the fixing | fixed part of the waterproof sheet fixing structure of this invention. It is explanatory drawing of the fixing screw which is a fixing tool of this invention. It is the top view which looked at the screw for fixing of the present invention from the lower end direction of the axis. It is a perspective view of the fixing plate which is a fixing tool of this invention. It is the top view which looked at the fixing plate which is a fixing tool of this invention from the upper surface direction. It is sectional drawing which shows 2nd Embodiment of the waterproof sheet fixing structure of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, embodiment of this invention is not restrict | limited by this.

  FIG. 1 shows a cross-sectional view of the waterproof sheet fixing structure according to the first embodiment. A fixing plate 2 is disposed on a waterproof base 1 made of a metal roof 1 a and a heat insulating material 1 b, and fixing screws 3 penetrate the fixing plate 2 and are fastened to the waterproof base 1. The upper surface of the fixing plate 2 and the lower surface of the waterproof sheet 4 are joined together, and the waterproof sheet 4 is fixed to the waterproof base 1 by a fixing tool including the fixing plate 2 and fixing screws 3.

  The waterproof sheet fixing structure of FIG. 1 is a waterproof sheet fixing structure by a mechanical fixing method called a tipping method. The upper surface of the fixing plate 2 and the lower surface of the waterproof sheet 4 fastened with fixing screws 3 on the waterproof base 1. In general, the fixing plate 2 and the waterproof sheet 4 are joined by heat fusion, solvent welding, or the like. At this time, a material in which at least the surface of the fixing plate 2 is made of the same material as that of the waterproof sheet 4 is preferably used.

FIG. 2 is an enlarged view of the fixing portion of the waterproof sheet fixing structure of FIG. The fixing plate 2A of the present embodiment has a disk shape, and includes a through hole 2b at the center and a countersink 2a around the center.
The fixing screw 3A is fixed to the waterproof base 1 through the through hole 2b of the fixing plate 2A disposed on the waterproof base 1 made of the metal roof 1a and the heat insulating material 1b. The screw head 3a of 3A is accommodated in the counterbore 2a of the fixed plate 2A, and the upper surface of the fixed plate 2A and the upper surface of the screw head 3a are positioned substantially flush with each other so as not to jump out from the upper surface of the fixed plate 2A.

  FIG. 3 shows an example of a fixing screw 3A used in the waterproof sheet fixing structure of the first embodiment. The fixing screw 3A includes a screw head 3a and a shaft 3b. The fixing screw 3A of FIG. 3 is a screw called a countersunk screw, and the screw head 3a has a flat upper end, and its outer diameter gradually decreases from the upper end of the screw head 3a toward the lower end (shaft 3b side).

  The screw head bottom 3c, which is the lower surface of the screw head, that is, the surface in contact with the counterbore 2a of the fixing plate 2A in the fixing portion shown in FIG. 2, preferably has an uneven surface. The fixing screw 3A in FIG. 3 has irregularities formed in a corrugated shape around the screw head bottom portion 3c so that a claw is applied to the screw tightening direction. With such a shape, when the fixing screw 3A passes through the through hole 2b of the fixing plate 2 and is fastened to the waterproof base 1, the convex portion of the screw bottom portion 3c bites into the counterbore 2a of the fixing plate 2A. Therefore, the loosening prevention effect of the fixing screw 3A can be obtained. In addition, even in the case of such a corrugated uneven shape such that the claw is applied in the direction opposite to that in FIG. 3, that is, an uneven surface that slides in the screw tightening direction, the fixing screw 3A tends to move in the loosening direction. In this case, since the convex portion of the screw head bottom portion 3c is caught by the counterbore 2a of the fixing plate 2A, this also provides an effect of preventing the fixing screw 3A from loosening.

  FIG. 4 is a plan view of the fixing screw 3A viewed from the lower end side of the shaft 3b. (4-1) shows the fixing screw 3A in FIG. 3, and (4-2) and (4-3) show other examples. (4-2) has irregularities formed in a corrugated shape so that a claw is applied to the screw tightening direction around the screw head bottom 3c as in (4-1). ) Is unevenly formed radially, whereas (4-2) is unevenly formed spirally. (4-3) is one in which a number of fine irregularities are formed on the entire screw head bottom 3c. The unevenness of the screw bottom 3c may be any as long as it increases the frictional resistance between the screw bottom 3c and the countersink 2a of the fixing plate 2A against the force in the loosening direction of the fixing screw 3A. Various uneven shapes such as a stripe shape and a nail shape can be adopted.

  Further, the screw head bottom portion 3c of the fixing screw 3A may be coated with a resin layer such as polyvinyl chloride resin, polyolefin resin or acrylic resin, or a rubber layer such as nitrile rubber or styrene-butadiene rubber on the surface. . As a result, the frictional resistance between the screw head bottom 3c of the fixing screw 3A and the countersink 2a of the fixing plate 2A increases, and the effect of preventing the loosening of the fixing screw 3A is obtained.

  FIG. 5 shows an example of a fixing plate 2A used in the waterproof sheet fixing structure of the first embodiment, and corresponds to a countersunk screw type fixing screw 3A. The fixing plate 2A has a lower periphery and a central portion, and a through hole 2b through which the fixing screw 3A passes and a counterbore 2a in which the screw head 3a is accommodated are formed in the central portion.

  Concavities and convexities may be formed on the surface of the counterbore 2a as shown in FIG. The fixing plate 2A in FIG. 5 has irregularities formed in a corrugated shape around the counterbore 2a so that claws are applied to the screwing direction of the fixing screw 3A. With such a shape, when the fixing screw 3A passes through the through hole 2b of the fixing plate 2A and is fastened to the waterproof base 1, the convex portion of the counterbore 2a of the fixing plate 2A bites into the screw base 3c. Therefore, the loosening prevention effect of the fixing screw 3A can be obtained. In addition, even in the case of such a corrugated uneven shape such that the claw is applied in the opposite direction to FIG. 5, that is, an uneven surface that slides in the screwing direction, the fixing screw 3A will move in the loosening direction. In this case, since the convex portion of the counterbore 2a of the fixing plate 2A is hooked on the screw head bottom portion 3c, the effect of preventing the loosening of the fixing screw 3A is obtained.

  FIG. 6 is a plan view of the fixed plate 2A viewed from the upper side of the upper surface 2c. (6-1) shows the fixed plate 2A of FIG. 5, and (6-2) and (6-3) show other examples. (6-2) has irregularities formed in a corrugated shape around the counterbore 2a as in (6-1) so that claws are applied to the screw tightening direction. (6-1) Is unevenly formed radially, whereas (6-2) is unevenly formed spirally. (6-3) is one in which a number of fine irregularities are formed on the entire counterbore 2a. The unevenness of the countersink 2a may be any as long as it increases the frictional resistance between the countersink 2a and the screw bottom 3c of the fixing screw 3A against the force in the loosening direction of the fixing screw 3A. Various uneven shapes such as a stripe shape and a nail shape can be adopted.

  In the present embodiment, the unevenness on the surface of the screw head bottom 3c of the fixing screw 3A and the unevenness on the surface of the countersink 2a of the fixing plate 2A may be provided with either one, but the screw bottom of the fixing screw 3A. It may be provided in both so that the unevenness | corrugation of the surface of 3c and the unevenness | corrugation of the surface of the countersink 2a of 2 A of fixed plates may overlap. For example, on the surface of the screw bottom 3c of the fixing screw 3A, the corrugated unevenness as shown in (4-1) of FIG. 4 is provided on the surface of the counterbore 2a of the fixing plate 2A. When the corrugated irregularities as shown in FIG. 6 (6-1) are provided radially, when the fixing screws 3A are fastened through the through holes 2b of the fixing plate 2A, What is necessary is just to be comprised so that an unevenness | corrugation may overlap.

  Further, the counterbore 2a of the fixing plate 2A may have a surface covered with a resin layer such as polyvinyl chloride resin, polyolefin resin, acrylic resin, or a rubber layer such as nitrile rubber or styrene-butadiene rubber. As a result, the frictional resistance between the screw head bottom 3c of the fixing screw 3A and the countersink 2a of the fixing plate 2A increases, and the effect of preventing the loosening of the fixing screw 3A is obtained.

FIG. 7 is an enlarged view of the fixing portion of the waterproof sheet fixing structure of the present invention. The fixing plate 2B of the present embodiment has a disk shape, and includes a through hole 2b at the center and a countersink 2a including a countersink side portion 2a-1 and a countersink bottom portion 2a-2.
The fixing screw 3B is fixed to the waterproof base 1 through the through hole 2b of the fixing plate 2 arranged on the waterproof base 1 made of the metal roof 1a and the heat insulating material 1b. The screw head 3a of 3B is accommodated in the counterbore 2a of the fixing plate 2B, and the upper surface of the fixing plate 2B and the upper surface of the screw head 3a are substantially flush with each other so as not to jump out from the upper surface of the fixing plate 2B.

  FIG. 8 shows an example of a fixing screw 3B used in the waterproof sheet fixing structure of the first embodiment. The fixing screw 3B includes a screw head 3a and a shaft 3b. 8 is a screw called a pan screw, the screw head 3a is rounded around the upper end surface, and the lower end of the screw head 3a has a bottom surface perpendicular to the shaft 3b. The screw head 3a is shaped like an upside-down pan.

  The screw head bottom portion 3c, which is the lower surface of the screw head, that is, the surface in contact with the countersink bottom portion 2a-2 of the fixing plate 2B in the fixing portion shown in FIG. The fixing screw 3B of FIG. 8 has irregularities formed in a corrugated shape around the screw head bottom portion 3c so that a claw is applied to the screw tightening direction (not shown). By adopting such a shape, when the fixing screw 3B is passed through the through hole 2b of the fixing plate 2B and fastened to the waterproof base 1, the convex portion of the screw head bottom portion 3c is formed on the countersink bottom portion 2a-2 of the fixing plate 2B. Therefore, the fixing screw 3B can be prevented from loosening. In addition, even in the case of such a corrugated concave / convex shape such that a claw is applied in the opposite direction, that is, an irregularity that slides in the screw tightening direction, when the fixing screw 3B tries to move in the loosening direction, Since the convex part of the screw head bottom part 3c is hooked on the countersink bottom part 2a-2 of the fixing plate 2B, this also provides the effect of preventing the loosening of the fixing screw 3B.

  FIG. 9 is a plan view of the fixing screw 3B viewed from the lower end side of the shaft 3b. (9-1) shows the fixing screw 3B in FIG. 8, and (9-2) and (9-3) show other examples. (9-2) has irregularities formed in a corrugated shape so that a claw is applied to the screw tightening direction around the screw head bottom 3c as in (9-1). ) Is unevenly formed radially, whereas (9-2) is unevenly formed spirally. (9-3) is one in which a number of fine irregularities are formed on the entire screw head bottom 3c. The unevenness of the screw head bottom portion 3c may be any as long as it increases the frictional resistance between the screw head bottom portion 3c and the countersink bottom portion 2a-2 of the fixing plate 2B against the force in the loosening direction of the fixing screw 3B. Not only the shape but also various uneven shapes such as streaks and nail shapes can be adopted.

  Further, the screw head bottom portion 3c of the fixing screw 3B may be coated with a resin layer such as polyvinyl chloride resin, polyolefin resin, acrylic resin, or a rubber layer such as nitrile rubber or styrene-butadiene rubber. . As a result, the frictional resistance between the screw head bottom portion 3c of the fixing screw 3B and the countersink bottom portion 2a-2 of the fixing plate 2B is increased, and the effect of preventing the loosening of the fixing screw 3B is obtained.

  FIG. 10 shows an example of a fixing plate 2B used in the waterproof sheet fixing structure of the first embodiment, and corresponds to a pan screw type fixing screw 3B. The fixing plate 2B has a lower periphery and a central portion, and a through hole 2b through which the fixing screw 3B passes and a counterbore 2a in which the screw head 3a is accommodated are formed in the central portion.

  Concavities and convexities may be formed on the surface of the countersink bottom 2a-2 of the countersink 2a as shown in FIG. The fixing plate 2B of FIG. 10 has irregularities formed on the surface of the countersink bottom 2a-2 of the countersink 2a so as to form a claw so that a claw is applied to the screwing direction of the fixing screw 3B. . By adopting such a shape, when the fixing screw 3B passes through the through hole 2b of the fixing plate 2B and is fastened to the waterproof base 1, the countersink bottom portion 2a- of the counterboring 2a of the fixing plate 2B is fixed to the screw base 3c. Since the convex portion of 2 is bitten, the locking screw 3B can be prevented from loosening. In addition, even in the case of such a corrugated uneven shape such that the claw is applied in the direction opposite to that in FIG. 10, that is, an uneven shape that slides in the screw tightening direction, the fixing screw 3B tends to move in the loosening direction. In this case, since the convex portion of the countersunk bottom 2a-2 of the countersink 2a of the fixing plate 2B is caught on the screw head bottom 3c, the effect of preventing the loosening of the fixing screw 3B is also obtained.

  FIG. 11 is a plan view of the fixing plate 2B viewed from the upper side of the upper surface 2c. (11-1) shows the fixed plate 2B of FIG. 10, and (11-2) and (11-3) show other examples. (11-2) has irregularities formed on the surface of the countersink bottom portion 2a-2 of the countersink 2a as shown in (11-1) so as to have a claw applied to the screw tightening direction. In contrast, (11-1) has radial irregularities, whereas (11-2) has spiral irregularities. (11-3) is one in which a number of fine irregularities are formed on the entire surface of the countersink bottom 2a-2 of the countersink 2a. The unevenness on the surface of the countersink bottom 2a-2 of the countersink 2a is formed between the surface of the countersink 2a countersink bottom 2a-2 and the screw bottom 3c of the fixing screw 3B against the force in the loosening direction of the fixing screw 3B. Any shape that increases the frictional resistance may be used, and not only these shapes but also various uneven shapes such as a streak shape and a nail shape can be adopted.

  In the present embodiment, the unevenness of the surface of the screw bottom 3c of the fixing screw 3B and the unevenness of the surface of the countersunk bottom 2a-2 of the countersink 2a of the fixing plate 2B may be provided with either one, but the fixing Both the unevenness of the surface of the screw head bottom 3c of the screw 3B for use and the unevenness of the surface of the countersink bottom 2a-2 of the countersink 2a of the fixing plate 2B may be provided. For example, the surface of the screw head bottom 3c of the fixing screw 3B is provided with corrugated irregularities as shown in (9-1) of FIG. 9, whereas the countersink of the countersink 2a of the fixing plate 2B is provided. The corrugated irregularities as shown in FIG. 11 (11-1) provided radially on the surface of the bottom 2a-2 fasten the fixing screws 3B through the through holes 2b of the fixing plate 2B. In this case, it is only necessary that the surface irregularities overlap each other.

  Further, the countersink bottom 2a-2 of the countersink 2a of the fixing plate 2B is coated with a resin layer such as polyvinyl chloride resin, polyolefin resin, acrylic resin or a rubber layer such as nitrile rubber or styrene-butadiene rubber on the surface. You may do it. As a result, the frictional resistance between the screw head bottom portion 3c of the fixing screw 3B and the countersink bottom portion 2a-2 of the fixing plate 2B is increased, and the effect of preventing the loosening of the fixing screw 3B is obtained.

  FIG. 12 shows a cross-sectional view of the waterproof sheet fixing structure according to the second embodiment. A waterproof sheet 4 is laid on a waterproof base 1 composed of a metal roof 1a and a heat insulating material 1b, a fixing plate 2 is disposed thereon, and fixing screws 3 pass through the fixing plate 2 and fasten to the waterproof base 1 It has been. The additional sheet 5 is laid on the upper surface of the fixing plate 2, the upper surface of the fixing plate 2 and the lower surface of the additional sheet 5 are joined, and the waterproof sheet 4 is waterproofed by a fixing tool including the fixing plate 2 and fixing screws 3. 1 is fixed.

  The waterproof sheet fixing structure of FIG. 12 is a waterproof sheet fixing structure by a mechanical fixing method called a retrofitting method. The upper surface of the fixing plate 2 and the upper surface of the waterproof sheet 4 fastened to the waterproof sheet 4 with fixing screws 3. The fixing sheet 2 and the waterproof sheet 4 and the additional sheet 5 are generally joined by heat fusion, solvent welding, or the like. At this time, at least the surface of the fixing plate 2, the waterproof sheet 4, and the additional tension sheet 5 are preferably made of the same material.

  The waterproof base 1 is a housing such as a roof of a building, a veranda, and a balcony, and a concrete base, a metal base, lightweight foamed concrete (ALC), a steel material, a wood material, or the like is used. Moreover, you may laminate | stack other layers, such as an inorganic board and a heat insulating material, on these.

  The fixing plate 2 only needs to be able to fix the waterproof sheet 4. It is preferable that a through-hole for penetrating in the thickness direction and for driving the fixing screw 3 is provided. A counterbore for accommodating the screw head of the fixing screw 3 is preferably provided around the through hole. The thickness of the fixed plate 2 is about 0.5 mm to 2.0 mm, and the shape is arbitrary, such as a rectangular plate shape that is square or rectangular, a circular or elliptical disk shape, or a long shape, and the size is 1 The side or outer diameter can be formed to be about 50 mm to 100 mm. The fixing plate 2 is made of metal, hard synthetic resin, wood or the like. Metal is preferable from the viewpoint of strength and durability. As the material of the steel plate constituting the metal fixing plate, a stainless steel plate or a steel plate that does not rust even in high humidity, such as steel plate that has been subjected to rust prevention treatment such as zinc, aluminum, magnesium plating or galvanization, is suitable. Used for.

  In the embodiment of FIG. 1, when the fixing plate 2 and the waterproof sheet 4 are joined by fusion or welding, an adhesive layer is provided on the upper surface of the fixing plate 2. As the adhesive layer of the fixing plate 2, various adhesives such as acrylic, urethane, epoxy, nitrile rubber, styrene-butadiene rubber, thermoplastics such as polyvinyl chloride resin, polyolefin resin, acrylic resin, etc. A resin coating layer, or a sealing material in which a composition of a thermoplastic resin such as a polyvinyl chloride resin or an acrylic resin is dissolved in a solvent can be used. In the embodiment of FIG. 1, a polyvinyl chloride resin coating layer, which is a thermoplastic resin coating layer, is laminated and integrated on the upper surface of the fixing plate 2 (not shown). Considering the bonding strength, it is preferable to use the same material for the waterproof sheet 4 and the thermoplastic resin coating layer. When the waterproof sheet 4 is made of a polyvinyl chloride resin, the thermoplastic resin of the fixing plate 2 is used. The coating layer is also preferably made of a polyvinyl chloride resin. Further, the adhesive layer is not only provided in advance on the upper surface of the fixing plate 2, but may be newly provided during construction.

  As the fixing screw 3, a screw, a screw, a bolt, or the like is used. As the material, steel materials such as carbon steel, alloy steel, and stainless steel can be used. Also, the head of the fixing screw 3 should be flat, flat, and pan so that the head does not protrude from the upper surface of the fixing plate 2, and the recessed shape of the seat surface to be hung with a screwdriver or wrench is a cross hole, hexagonal hole, A square hole is preferred. The surface of the fixing screw 3 may be covered with various resin layers.

  As the waterproof sheet 4, a thermoplastic resin waterproof sheet is preferably used, and a polyvinyl chloride resin, a polyolefin resin, an acrylic resin, or the like can be used. The waterproof sheet 4 may be a single layer of a thermoplastic resin layer, but is preferably a multilayer product in which base layers such as glass cloth, glass nonwoven fabric, polyester cloth, and polyester nonwoven fabric are laminated from the viewpoint of excellent dimensional stability and tensile strength. . The base material layer may be provided in the lowermost layer, but may be provided in the middle of the thermoplastic resin layer. The thermoplastic resin layer may be a single layer or a plurality of layers, and the composition of each layer may be different.

  As the reinforcing sheet 5, a sheet similar to the waterproof sheet 4 can be used, a thermoplastic resin waterproof sheet is preferably used, and a vinyl chloride resin, a polyolefin resin, an acrylic resin, or the like can be used. The reinforcing sheet 5 may be a single layer of a thermoplastic resin layer, or may be a multilayer product in which base layers such as glass cloth, glass nonwoven fabric, polyester cloth, and polyester nonwoven fabric are laminated. The thermoplastic resin layer may be a single layer or a plurality of layers, and the composition of each layer may be different.

  The present invention is not limited to the embodiment described above, and can take various forms within the technical idea of the present invention.

DESCRIPTION OF SYMBOLS 1 Waterproof base | substrate 2 Fixing plate 2a Counterbore 2b Through-hole 2c Upper surface 3 Fixing screw 3a Screw head 3b Shaft 3c Screw head bottom part 4 Waterproof sheet 5 Reinforcement sheet

Claims (8)

A fixing plate arranged on a waterproof base;
Fixing screws that pass through the fixing plate and are fastened to the waterproof base;
A waterproof sheet that is laid on the waterproof base and is fixed by a fixture made of the fixing plate and the fixing screw; and
The fixing plate has a countersink that can store a screw head of the fixing screw;
A waterproof sheet fixing structure in which an unevenness is provided on a surface of the back surface of the screw head that contacts the counterbore. A fixing plate arranged on a waterproof base;
Fixing screws that pass through the fixing plate and are fastened to the waterproof base;
A waterproof sheet that is laid on the waterproof base and is fixed by a fixture made of the fixing plate and the fixing screw; and
The fixing plate has a countersink that can store a screw head of the fixing screw;
A waterproof sheet fixing structure in which an unevenness is provided on a surface of the counterbore facing the screw head. A fixing plate arranged on a waterproof base;
Fixing screws that pass through the fixing plate and are fastened to the waterproof base;
A waterproof sheet that is laid on the waterproof base and is fixed by a fixture made of the fixing plate and the fixing screw; and
The fixing plate has a countersink that can store a screw head of the fixing screw;
Concavities and convexities are provided on the surface of the screw head that comes into contact with the countersink,
Concavities and convexities are provided on the surface of the counterbore that contacts the screw head,
The waterproof sheet fixing structure corresponding to the unevenness provided on the back surface of the screw head and the unevenness provided on the surface of the countersink. The waterproof sheet fixing structure according to claim 1, wherein a surface of the fixing plate that contacts the screw head is covered with a resin layer on the surface of the counterbore. The waterproof sheet fixing structure according to claim 1, wherein a surface of the screw head that comes into contact with the counterbore is covered with a resin layer. It is composed of a fixing plate and fixing screws, and is a fixture for fixing a waterproof sheet on a waterproof base,
The fixing plate includes a through hole through which the fixing screw passes and a counterbore capable of accommodating the screw head of the fixing screw,
A waterproof sheet fixture, wherein a back surface of the screw head is provided with irregularities on a surface that abuts against the counterbore. It is composed of a fixing plate and fixing screws, and is a fixture for fixing a waterproof sheet on a waterproof base,
The fixing plate includes a through hole through which the fixing screw passes and a counterbore capable of accommodating the screw head of the fixing screw,
A waterproof sheet fixture, wherein a surface of the counterbored surface that is in contact with the screw head is provided with irregularities. It is composed of a fixing plate and fixing screws, and is a fixture for fixing a waterproof sheet on a waterproof base,
The fixing plate includes a through hole through which the fixing screw passes and a counterbore capable of accommodating the screw head of the fixing screw,
Concavities and convexities are provided on the surface of the screw head that comes into contact with the countersink,
Concavities and convexities are provided on the surface of the counterbore that contacts the screw head,
The waterproof sheet fixture corresponding to the unevenness provided on the back surface of the screw head and the unevenness provided on the surface of the countersink.

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