Basic waterproofing structure

Abstract

To provide a foundation waterproofing structure that can be installed with minimal labor costs on foundation blocks and existing fittings placed on the floor of a building structure, and that can provide excellent waterproofing performance with superior durability. [Solution] The foundation waterproofing structure of the present invention is a structure that provides waterproofing performance to a foundation block and an existing fitting, and comprises a resin-coated steel plate formed in a shape including a concave molded portion and a flange portion, the foundation block is housed in the concave molded portion, the existing fitting is passed through a through hole opening in the bottom of the concave molded portion, and the flange portion is positioned to face the floor portion; a fastener for fastening the flange portion to the floor portion; a waterproof sheet that is adhered to or welded to the flange portion and covers the floor portion; a sealing portion provided in the gap between the periphery of the through hole in the resin-coated steel plate and the foundation block; an annular flange surrounding the existing fitting; an annular packing sheet surrounding the existing fitting; and a pressing tool for pressing the flange toward the resin-coated steel plate.

Description

Technical Field

[0001] The present invention relates to a basic waterproof structure.

Background Art

[0002] Patent Document 1 discloses a method for installing a solar panel on a reinforced concrete roof, which includes drilling holes for anchor bolts on the roof, fixing the base of the anchor bolts in the holes with a thermosetting resin, forming a trapezoidal concrete foundation leaving the tip of the fixed anchor bolts, and forming a waterproof layer on the surface of the concrete foundation and the roof surface around it.

[0003] In this method, the anchor bolts are penetrated through the existing waterproof layer and the holding mortar on the roof, and a concrete foundation is formed around it. Therefore, construction is possible even for existing buildings.

[0004] On the other hand, in order to form a waterproof layer on the surface of the concrete foundation and the roof surface around it, there is a problem that a large number of man-hours are required. In addition, when forming a waterproof layer using a silicone caulking material, there are concerns such as the occurrence of poor formation of the waterproof layer and the reduction of durability due to the exposure of the waterproof layer.

[0005] Also, a method is known in which the weight of the foundation block is used as an anchor without drilling holes in the existing waterproof layer. In this method, the foundation block is placed on the existing waterproof layer, and the solar panel is installed using it as a foundation.

[0006] On the other hand, when performing repair work on the waterproof layer to which this method is applied, the foundation block becomes an obstacle to the work, so it needs to be removed. However, since the weight of the foundation block has been increased in consideration of wind pressure resistance, an increase in man-hours is a concern in the removal and reinstallation of the foundation block.

Prior Art Documents

Patent Documents

[0007] [Patent Document 1] Japanese Patent Publication No. 2000-017802 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The object of the present invention is to provide a foundation waterproofing structure that can be installed with fewer steps on foundation blocks and existing fittings placed on the floor portion of a building structure, and that can provide excellent waterproofing performance with superior durability. [Means for solving the problem]

[0009] These objectives are achieved by the present invention as described in (1) to (9) below. (1) A structure that provides waterproofing performance to the foundation block placed on the floor portion of the building structure and to the existing metal fittings protruding upward from the foundation block, A resin-coated steel plate is formed into a shape including a concave molded portion and a flange portion surrounding the concave molded portion, the foundation block is housed within the concave molded portion, the existing fitting is passed through a through hole opening in the bottom of the concave molded portion, and the flange portion is positioned to face the floor portion, A fastening device for fastening the flange portion to the floor portion, A waterproof sheet is bonded or welded to the flange portion and covers the floor portion, A sealing portion is provided in the gap between the resin-coated steel plate and the through hole and the foundation block, An annular flange is provided above the resin-coated steel plate and surrounds the existing fitting, A packing sheet is provided between the flange and the resin-coated steel plate, forming an annular shape that surrounds the existing fitting, A pressing tool that engages with the aforementioned existing fitting to press the flange toward the resin-coated steel plate, A foundation waterproofing structure characterized by having the following features.

[0010] (2) The concave molded portion is The bottom and, A side wall portion connecting the outer edge of the bottom portion and the inner edge of the flange portion, It has, The foundation waterproofing structure according to (1) above, wherein the side wall portion is formed in a shape that is inclined outward from the bottom portion.

[0011] (3) The foundation waterproof structure described in (2) above, wherein the angle between the bottom and the side wall is greater than 90° and less than or equal to 160°.

[0012] (4) The resin-coated steel sheet is a PVC-coated steel sheet, as described in any of (1) to (3) above, for the foundation waterproofing structure.

[0013] (5) The existing fittings are bolts, The pressing device is a nut that screws onto the bolt, according to any one of (1) to (4) above, for the foundation waterproof structure.

[0014] (6) The packing sheet is a foundation waterproofing structure according to any one of (1) to (5) above, with vinyl chloride resin as the main material.

[0015] (7) A foundation waterproofing structure according to any one of (1) to (6) above, comprising an insulating sheet laid between the floor portion and the waterproofing sheet.

[0016] (8) The waterproof sheet is superimposed on the flange portion of the resin-coated steel plate, the foundation waterproof structure according to any one of (1) to (7) above.

[0017] (9) The foundation waterproofing structure according to any one of (1) to (8) above, wherein the fastening device is a fixing screw inserted through a screw hole formed in the flange and driven into the floor. [Effects of the Invention]

[0018] According to the present invention, a foundation waterproofing structure can be obtained that can be installed with fewer steps on foundation blocks and existing fittings placed on the floor portion of a building structure, and that can provide excellent waterproofing performance with superior durability.

Brief Description of the Drawings

[0019] [Figure 1] It is a partial cross-sectional view of a solar panel unit fixed on the floor of a body. [Figure 2] It is an enlarged view of part A including the foundation waterproof structure shown in FIG. 1. [Figure 3] It is an exploded cross-sectional view of the foundation waterproof structure shown in FIG. 2. [Figure 4] It is a plan view of a resin-coated steel plate shown in FIG. 3.

Embodiments for Carrying Out the Invention

[0020] Hereinafter, the foundation waterproof structure of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

[0021] 1. Solar Panel Unit The foundation waterproof structure according to the embodiment is, for example, a structure that can be constructed with a small number of man-hours for a foundation for fixing various arrangements on the floor of a rooftop (body) and can impart waterproof performance with excellent durability. In the following description, as an example of an arrangement fixed to the foundation, a solar panel unit will be described, but the arrangement may be any object other than the solar panel unit.

[0022] FIG. 1 is a partial cross-sectional view of a solar panel unit 70 fixed on the floor 91 of a body 9. FIG. 2 is an enlarged view of part A including the foundation waterproof structure 1 shown in FIG. 1. FIG. 3 is an exploded cross-sectional view of the foundation waterproof structure 1 shown in FIG. 2. In the following description, the upper side in FIGS. 1 to 3 will be referred to as "upper" and the lower side as "lower". Also, in each figure, for the sake of illustration, the dimensional ratios of each part are made different from the actual ones.

[0023] The body 9 shown in FIG. 1 is the rooftop (flat roof) of a building. Note that the body to which the present invention is applied is not limited to this and may be a veranda or the like. The body 9 shown in FIG. 1 has a floor 91 provided on the rooftop of the building.

[0024] The floor section 91 is composed of flat panels such as autoclaved lightweight aerated concrete (ALC) panels or extruded cement boards (ECP). In this case, these flat panels are joined to a structure (not shown) provided by the frame 9. The floor section 91 may also be composed of reinforced concrete, steel, or wood.

[0025] A waterproof layer 30 is laid on the floor section 91 shown in Figure 1. The waterproof layer 30 is a watertight layer formed by various waterproofing treatments. Examples of waterproofing treatments include sheet waterproofing, urethane waterproofing, asphalt waterproofing, and FRP waterproofing. Of these, the waterproof layer 30 formed by sheet waterproofing is mainly composed of resin materials such as vinyl chloride resin, ethylene vinyl acetate resin, and thermoplastic elastomer, and is preferably mainly composed of vinyl chloride resin.

[0026] Furthermore, any member such as an insulating layer may be provided between the floor portion 91 and the waterproof layer 30. Also, any member such as a concrete overlay layer may be provided on the waterproof layer 30.

[0027] Foundation blocks 40 are placed on the waterproof layer 30 shown in Figure 1. The foundation blocks 40 are made of, for example, concrete blocks, metal blocks, etc. The foundation blocks 40 act as anchors due to their own weight.

[0028] The shape of the foundation block 40 shown in Figure 1 is a rectangular parallelepiped, but it is not limited to this, and may be cylindrical, or have other shapes, for example.

[0029] The size of the foundation block 40 is set appropriately according to the size and shape of the structure to be placed, the installation environment, etc., but as an example, the horizontal length is 100 to 800 mm and the vertical thickness is 20 to 150 mm.

[0030] The foundation block 40 may simply be placed on the waterproof layer 30, but in Figure 2, it is bonded to the waterproof layer 30 via an adhesive layer 44. The adhesive layer 44 is composed of, for example, butyl rubber adhesive tape, acrylic rubber adhesive tape, solvent-based adhesive, etc.

[0031] The existing fitting 42 shown in Figure 2 is attached to the foundation block 40. The existing fitting 42 shown in Figure 2 is a bolt whose lower end is embedded in the foundation block 40 and whose upper end protrudes upward. Note that the existing fitting 42 is not limited to a bolt and may have any shape depending on the arrangement.

[0032] The solar panel unit 70 shown in Figure 1 has a flat solar panel section 71 and a plurality of legs 72 that support the solar panel section 71. The upper end of each leg 72 is connected to the solar panel section 71, and the lower end is fixed to an existing fitting 42 via a fastener 50 shown in Figure 2.

[0033] 2. Basic waterproof structure Next, we will explain the foundation waterproofing structure 1.

[0034] The foundation waterproofing structure 1 shown in Figure 2 provides waterproofing performance to the foundation block 40, the existing fittings 42, and the surrounding floor area 91. This prevents the foundation block 40 and the existing fittings 42 from becoming pathways for water to enter.

[0035] The foundation waterproofing structure 1 shown in Figure 2 comprises a resin-coated steel plate 11, fixing screws 12 (fasteners), a waterproof sheet 13, an insulating sheet 14, a sealing part 15, a flange 21, packing sheets 22 and 23, washers 24, spring washers 25, and pressing nuts 261 and 262 (pressing devices).

[0036] 2.1. Resin-coated steel sheet As shown in Figure 3, the resin-coated steel sheet 11 is molded into a shape that includes a concave molded portion 112 containing a recess S, and a flange portion 113 surrounding the concave molded portion 112.

[0037] The recess S is a bottomed space that opens downwards and has its bottom facing upwards. In other words, the resin-coated steel plate 11 is formed into a shape having a recess S that opens downwards. The foundation block 40 is housed in the recess S, as shown in Figure 2.

[0038] As shown in Figure 2, the flange portion 113 is the part that faces the base portion 91. "Facing" means that it is a plate-like shape that is approximately parallel to the base portion 91. The flange portion 113 is fastened to the base portion 91 by fixing screws 12.

[0039] In such resin-coated steel sheets 11, a concave molded portion 112 and a flange portion 113 are formed by molding. Therefore, there are no seams between the concave molded portion 112 and the flange portion 113, providing excellent waterproofing performance to the foundation block 40 and existing fittings 42. In addition, the resin-coated steel sheet 11 contributes to reducing the number of parts through integral molding. As a result, the resin-coated steel sheet 11 can reduce the man-hours required when constructing the foundation waterproofing structure 1.

[0040] Examples of forming processes include press drawing, stretching, and thermoforming. Of these, press drawing is preferred. Press drawing allows for a reduction in the difference between the thickness of the concave formed portion 112 and the thickness of the flange portion 113, resulting in a resin-coated steel sheet 11 with superior mechanical strength.

[0041] Furthermore, the foundation waterproofing structure 1 according to this embodiment is also useful in that it can reduce the amount of work required in the repair work of the waterproofing layer 30. Specifically, when repair work of the waterproofing layer 30 is performed without using the foundation waterproofing structure 1 according to this embodiment, the foundation blocks 40 become an obstacle to the work, requiring the removal and reinstallation of the foundation blocks 40. Since the foundation blocks 40 are heavy objects, removal and reinstallation require a lot of work. In contrast, by using the foundation waterproofing structure 1 according to this embodiment, the repair work of the waterproofing layer 30 and the provision of waterproofing performance to the foundation blocks 40 and existing fittings 42 can be performed without moving the foundation blocks 40. For this reason, the amount of work required in the repair work of the waterproofing layer 30 can be reduced by using the foundation waterproofing structure 1 according to this embodiment.

[0042] The concave molded portion 112 shown in Figure 3 is located inside the annular flange portion 113 and has a bottom portion 112a and a side wall portion 112b that connects the outer edge of the bottom portion 112a to the inner edge of the flange portion 113.

[0043] The bottom portion 112a is the part that faces the upper surface of the foundation block 40. "Facing" means that it is a plate-like surface approximately parallel to the upper surface of the foundation block 40. A through hole 115 is also provided in the bottom portion 112a. The existing fitting 42 passes through the through hole 115. The bottom portion 112a of the resin-coated steel plate 11 is fixed to the existing fitting 42 by pressing nuts 261, 262, etc., which will be described later.

[0044] With this configuration, the tip of the existing fitting 42 is exposed from the resin-coated steel plate 11, while waterproofing performance can be provided to the base block 40 and the base end of the existing fitting 42. This makes it possible to fix the solar panel unit 70 while ensuring waterproofing performance.

[0045] Furthermore, the resin-coated steel plate 11 connects the existing fittings 42 and the floor section 91. This allows the existing fittings 42 and the foundation blocks 40 to be fixed to the floor section 91. As a result, the fixing due to the weight of the foundation blocks 40 can be reinforced. In other words, since the resin-coated steel plate 11 uses a steel plate or the like described later as a core material, it has superior mechanical strength compared to cases without a core material (such as molded resin sheets). Therefore, the existing fittings 42 and the floor section 91 are connected via the resin-coated steel plate 11, and in addition to the pressing load due to the weight of the foundation blocks 40, a pressing load from the resin-coated steel plate 11 can be added. This not only provides waterproofing performance to the foundation blocks 40 and existing fittings 42, but also improves the stability of the fixing, seismic resistance, wind pressure resistance, etc.

[0046] Furthermore, the side wall portion 112b shown in Figure 3 is shaped to tilt outward from the outer edge of the bottom portion 112a. In other words, the side wall portion 112b is tilted so that it displaces outward as it moves away from the bottom portion 112a. This makes it difficult for water to accumulate between the side wall portion 112b and the flange portion 113, thereby realizing a foundation waterproof structure 1 with good drainage. In this specification, "outside" refers to the direction (radial direction) from the through hole 115 toward its surroundings.

[0047] The angle between the bottom portion 112a and the side wall portion 112b of the concave molded portion 112 (the angle formed on the side of the recess S) is defined as the tilt angle θ. The tilt angle θ may be 90° or less, but is preferably greater than 90° and 160° or less, and more preferably 120° or more and 150° or less. By setting the tilt angle θ within the above range, the angle between the side wall portion 112b and the flange portion 113 (the angle formed on the opposite side of the recess S) becomes approximately the same as the tilt angle θ. In this case, a foundation waterproof structure 1 with particularly good drainage can be realized. Furthermore, if the tilt angle θ is within the above range, residual stress associated with the molding process can be mitigated. This suppresses the decrease in mechanical strength associated with residual stress, and can contribute to improving the seismic resistance of the foundation waterproof structure 1, for example. Moreover, if the tilt angle θ is within the above range, the resistance of the side wall portion 112b to wind (wind pressure resistance) can be reduced. This improves the wind pressure resistance of the foundation waterproofing structure 1, and also provides secondary benefits such as reduced wind noise.

[0048] Furthermore, if the tilt angle θ falls below the lower limit, there is a risk of poor drainage, increased residual stress due to molding, and increased wind pressure resistance. On the other hand, the tilt angle θ may exceed the upper limit, but in that case, the projected area of ​​the resin-coated steel plate 11 relative to the floor portion 91 will increase, which may be an obstruction.

[0049] The resin-coated steel sheet 11 comprises a core material and a resin layer covering the core material. Examples of the core material include cold-rolled steel sheets, hot-dip galvanized steel sheets, hot-dip zinc-aluminum alloy coated steel sheets, electro-galvanized steel sheets, zinc-aluminum-magnesium alloy coated steel sheets, stainless steel sheets, aluminum sheets, and aluminum alloy sheets. Examples of the constituent materials of the resin layer include vinyl chloride resins and hot-melt resins, with vinyl chloride resins being preferred. In other words, the resin-coated steel sheet 11 is preferably a vinyl chloride coated steel sheet. This particularly enhances the adhesion or welding properties between the resin-coated steel sheet 11 and the waterproof sheet 13 when the waterproof sheet 13 contains a vinyl chloride resin.

[0050] The resin-coated steel sheet 11 has high mechanical strength due to its metal core and good corrosion resistance and watertightness due to its resin layer. Therefore, by using the resin-coated steel sheet 11, the mechanical strength and waterproofing performance of the foundation waterproofing structure 1 can be enhanced over the long term.

[0051] The thickness of the core material is not particularly limited, but is preferably 0.2 mm to 1.6 mm, and more preferably 0.5 mm to 1.2 mm. This provides a resin-coated steel sheet 11 that has sufficient mechanical strength and can be molded with high precision.

[0052] The thickness of the resin layer is not particularly limited, but is preferably 0.05 mm to 0.7 mm, and more preferably 0.1 mm to 0.5 mm. This provides a resin-coated steel sheet 11 with sufficient corrosion resistance and watertightness.

[0053] Figure 4 is a plan view of the resin-coated steel plate 11 shown in Figure 3. In the resin-coated steel sheet 11 shown in Figure 4, the corners of the outer edge 116 are rounded in plan view. This helps to suppress damage to the waterproof sheet 13 even if, for example, the corners of the outer edge 116 come into contact with the waterproof sheet 13. The minimum bending radius R1 of the corners of the outer edge 116 is preferably 20 mm or more.

[0054] Furthermore, in the resin-coated steel sheet 11 shown in Figure 4, the corners of the boundary line 117 between the side wall portion 112b and the flange portion 113 are also rounded. This improves water drainage near the boundary line 117. As a result, water flows more easily along the boundary line 117, suppressing corrosion of the resin-coated steel sheet 11 due to water and reducing its aesthetic appearance. In addition, when forming a member in which the core material and resin layer are pre-laminated, forming the boundary line 117 to have a rounded shape can suppress damage and deterioration of the resin layer. The minimum bending radius R2 of the corners of the boundary line 117 is preferably 40 mm to 150 mm, and more preferably 50 mm to 100 mm, taking into consideration the balance between these effects and size.

[0055] 2.2. Fixing screws (fasteners) As shown in Figures 3 and 4, screw holes 114 are formed in the flange portion 113, penetrating in the thickness direction. As shown in Figure 3, fixing screws 12 are inserted through these screw holes 114. The fixing screws 12 are then driven into the floor portion 91, penetrating the insulating sheet 14 and the waterproof layer 30, as shown in Figure 2. This allows the resin-coated steel plate 11 to be fastened to the floor portion 91. Note that the fixing screws 12 may be replaced with other fasteners. Examples of other fasteners include various types of anchors.

[0056] Furthermore, it is preferable that the heads of the fixing screws 12 driven into the floor portion 91 are covered with a waterproof sheet 13. This prevents water from entering through the fixing screws 12. It also prevents rusting of the fixing screws 12.

[0057] 2.3. Waterproof sheet The waterproof sheet 13 is laid so as to cover the portion of the floor 91 other than the recessed molded portion 112 of the resin-coated steel plate 11. In other words, an opening is formed in which the recessed molded portion 112 is exposed. The end of this opening is bonded or welded to the flange portion 113. This connects the resin-coated steel plate 11 and the waterproof sheet 13, providing waterproofing performance. Furthermore, the waterproof sheet 13 shown in Figure 2 overlaps the flange portion 113. This ensures a sufficiently large surface area for bonding and welding, thereby particularly enhancing watertightness. In addition, by covering the screw holes 114 provided in the flange portion 113 with the waterproof sheet 13, water intrusion through the fixing screws 12 can be suppressed.

[0058] The constituent materials of the waterproof sheet 13 are not particularly limited as long as they are waterproof materials, but preferably the main material is a vinyl chloride resin such as polyvinyl chloride. This makes it possible to obtain a waterproof sheet 13 with excellent water-stopping properties and durability.

[0059] The vinyl chloride resin is not particularly limited as long as it is a polymer containing vinyl chloride, i.e., an oligomer, prepolymer, or polymer. Examples include a monomeric polymer of vinyl chloride, a copolymer of vinyl chloride with vinyl acetate, ethylene, or propylene, and mixtures of two or more of these.

[0060] The thickness of the waterproof sheet 13 is not particularly limited, but is preferably 0.5 mm to 5 mm, more preferably 0.7 mm to 3 mm, and even more preferably 1 mm to 2 mm. This makes it possible to achieve both waterproof performance and durability and shape conformability of the waterproof sheet 13.

[0061] Furthermore, the waterproof sheet 13 may consist of a single layer of resin sheet, but it may also have a multilayer structure in which one or more layers of resin sheets or other layers are laminated in the thickness direction. Examples of other layers include fiber layers (fiber sheets). Examples of multilayer structures include a structure in which a fiber layer is sandwiched between two layers of resin sheet.

[0062] Examples of the fiber layer include woven fabrics and nonwoven fabrics, and nets formed by creating multiple grids with warp and weft threads. Examples of fibers included in the fiber layer include resin fibers, glass fibers, and carbon fibers. By having such a fiber layer, the mechanical strength of the waterproof sheet 13, such as tear strength and tensile strength, and durability, such as resistance to repeated fatigue, can be improved.

[0063] 2.4. Insulating Sheet The insulating sheet 14 is laid between the floor portion 91 and the waterproof sheet 13. In the example shown in Figure 2, it is laid between the waterproof layer 30 laid on the floor portion 91 and the waterproof sheet 13. In other words, the insulating sheet 14 insulates the waterproof sheet 13 from other components. As a result, the insulating sheet 14 can prevent components contained in the waterproof sheet 13 from migrating to the waterproof layer 30 and the floor portion 91. Consequently, it can prevent components from leaching out of the waterproof sheet 13 and suppress the deterioration of the waterproof sheet 13. Similarly, it can prevent components from leaching out of the waterproof layer 30 and the acceleration of its deterioration. Note that the insulating sheet 14 may be provided as needed and may be omitted.

[0064] Examples of constituent materials for the insulating sheet 14 include resin materials, metal materials, oxide materials, etc. Furthermore, the constituent materials of the insulating sheet 14 may be a composite material of two or more of these types.

[0065] Examples of resin materials include low-density polyethylene (LDPE), high-density polyethylene (HDPE), polyethylene terephthalate, polypropylene, ethylene-vinyl acetate copolymer (EVA), polyamide, acrylic resin, polyvinylidene chloride, polyvinyl alcohol, and polystyrene.

[0066] Examples of metallic materials include elements or alloys of aluminum, titanium, and nickel, as well as stainless steel. Examples of oxide materials include oxides of alumina, zirconia, titania, magnesia, and silica.

[0067] The insulating sheet 14 may be a multilayer sheet using these constituent materials. In the case of a multilayer sheet, the constituent materials of each layer may be the same or different.

[0068] Furthermore, the insulating sheet 14 may have the aforementioned fiber layer. The fiber layer may be a fabric such as a nonwoven or woven cloth, a net, or paper. Including a fiber layer can improve the mechanical strength and durability of the insulating sheet 14.

[0069] The thickness of the insulating sheet 14 is not particularly limited, but is preferably, for example, 10 μm to 2000 μm, more preferably 30 μm to 500 μm, and even more preferably 50 μm to 200 μm. This ensures sufficient insulation properties in the insulating sheet 14.

[0070] 2.5. Sealing section The sealing portion 15 is provided in the gap between the through-hole 115 of the resin-coated steel plate 11 and the foundation block 40. By filling the gap, the sealing portion 15 can block the water intrusion path from the through-hole 115 to the gap.

[0071] Examples of materials that can be used to construct the sealing portion 15 include silicone-based sealants, modified silicone-based sealants, polyurethane-based sealants, polysulfide-based sealants, acrylic-based sealants, and butyl rubber-based sealants. Of these, silicone-based sealants or modified silicone-based sealants are preferred. These are useful as constituent materials for the sealing portion 15 because they can suppress the migration of components that leach out from the resin-coated steel sheet 11, even when used in contact with the resin-coated steel sheet 11.

[0072] Furthermore, it is preferable that a portion of the sealing portion 15 also extends into the through-hole 115. This allows for water to be sealed not only in the gap between the resin-coated steel plate 11 and the foundation block 40, but also in the through-hole 115, thereby more reliably blocking the water intrusion route.

[0073] 2.6. Flange The flange 21 is a plate-shaped member that forms an annular shape surrounding the existing fitting 42, and is provided above the resin-coated steel plate 11 via packing sheets 22 and 23. Specifically, the flange 21 has a hole 215 that penetrates through the central part in the thickness direction when viewed from above. The existing fitting 42 is inserted through the hole 215.

[0074] The flange 21 is pressed downward by the pressing nuts 261 and 262. This allows the packing sheets 22 and 23 to be sandwiched between the resin-coated steel plate 11 and the flange 21. As a result, watertightness between the resin-coated steel plate 11 and the flange 21 can be ensured.

[0075] The plan view shape of the flange 21 is not particularly limited, but may be a circle such as a perfect circle, ellipse, or oblong, or it may be a polygon or other shape.

[0076] Examples of materials that can be used to construct the flange 21 include various metal materials such as stainless steel, iron-based alloys such as steel, aluminum alloys, and copper alloys. Of these, iron-based alloys are preferably used, and stainless steel is more preferably used. This further enhances the mechanical strength and durability of the flange 21.

[0077] Furthermore, the flange 21 may also be a member having a core material and a resin layer, similar to the resin-coated steel plate 11.

[0078] The thickness of the flange 21 is not particularly limited, but is preferably 0.5 mm to 5 mm, and more preferably 1 mm to 3 mm. This provides sufficient mechanical strength to the flange 21. It also suppresses the decrease in handling ease that may occur due to the increased weight of the flange 21.

[0079] The outer diameter of the flange 21 is preferably 80% to 125% of the outer diameter of the packing sheets 22 and 23, and more preferably 90% to 115%. This allows the flange 21 to press against substantially the entire packing sheets 22 and 23, thereby ensuring good watertightness using substantially the entire packing sheets 22 and 23 while suppressing the occurrence of parts that do not contribute to watertightness. Furthermore, since gaps tend to form in the parts that are not pressed (parts that do not contribute to watertightness), and rainwater and foreign matter tend to accumulate there, it is preferable for the outer diameter of the flange 21 to be within the above range from this viewpoint as well.

[0080] 2.7. Packing Sheet The packing sheets 22 and 23 are provided between the flange 21 and the resin-coated steel plate 11 and form annular sheets surrounding the existing fitting 42. Specifically, the packing sheets 22 and 23 have holes 225 and 235 that penetrate through the center in the thickness direction when viewed from above. The existing fitting 42 is inserted through the holes 225 and 235.

[0081] The packing sheets 22 and 23 are sandwiched between the resin-coated steel plate 11 and the flange 21 in an overlapping state. This ensures watertightness between the resin-coated steel plate 11 and the flange 21.

[0082] Examples of materials that make up the packing sheets 22 and 23 include resin materials, elastomer materials, and rubber materials.

[0083] Examples of resin materials include low-density polyethylene (LDPE), high-density polyethylene (HDPE), polyethylene terephthalate, polypropylene, ethylene-vinyl acetate copolymer (EVA), polyamide, acrylic resin, vinyl chloride resin, vinylidene chloride resin, polyvinyl alcohol, polystyrene, and fluororesin. The resin material may also be a polymer blend or polymer alloy containing two or more of these materials.

[0084] Examples of elastomer materials include olefin-based elastomers such as ethylene-propylene copolymer (EPM) and ethylene-propylene-diene copolymer (EPDM), styrene-based elastomers such as styrene-butadiene copolymer (SBS) and styrene-ethylene-butadiene copolymer (SEBS), silicone-based elastomers, nitrile-based elastomers, butadiene-based elastomers, urethane-based elastomers, nylon-based elastomers, ester-based elastomers, and fluorine-based elastomers.

[0085] Examples of rubber materials include polyisobutylene, polyisoprene, chloroprene rubber, butyl rubber, silicone rubber, fluororubber, acrylic rubber, urethane rubber, ethylene propylene rubber, butadiene rubber, acrylonitrile butadiene rubber, and styrene butadiene rubber.

[0086] Of these, the main material of the packing sheets 22 and 23 is preferably a polyvinyl chloride resin. This provides packing sheets 22 and 23 with excellent water-sealing properties and durability.

[0087] The constituent materials of packing sheets 22 and 23 may be different from each other, but preferably they are made of the same material. This ensures good watertightness between packing sheet 22 and packing sheet 23.

[0088] The thickness of the packing sheet 23 is preferably 50% to 200% of the thickness of the packing sheet 22, and more preferably 80% to 150%. This optimizes the rebound elasticity of the packing sheets 22 and 23. As a result, good watertightness can be provided between the packing sheet 22 and the packing sheet 23.

[0089] The thickness of the packing sheets 22 and 23 is preferably 0.5 mm to 5 mm, more preferably 0.7 mm to 3 mm, and even more preferably 1 mm to 2 mm. This imparts appropriate rebound elasticity to the packing sheets 22 and 23. Furthermore, packing sheets 22 and 23 with thicknesses within the above range have good durability. As a result, packing sheets 22 and 23 that are less prone to damage are obtained.

[0090] The planar shapes of the packing sheets 22 and 23 are not particularly limited, but may be circular, such as a perfect circle, ellipse, or oblong, or they may be polygons or other shapes.

[0091] The Young's moduli of packing sheets 22 and 23 are set to E2 and E3, respectively. The Young's moduli of E2 and E3 are preferably 5 MPa to 200 MPa, and more preferably 30 MPa to 100 MPa.

[0092] With this configuration, the Young's moduli E2 and E3 of the packing sheets 22 and 23 are optimized, resulting in packing sheets 22 and 23 with appropriate flexibility. Such packing sheets 22 and 23 possess both shape conformability and durability.

[0093] Furthermore, the Young's modulus E3 of the packing sheet 23 is preferably 60% to 150% of the Young's modulus E2 of the packing sheet 22, more preferably 80% to 125%, and even more preferably 90% to 110%. This ensures that the flexibility of both is nearly the same, allowing the pressure received from the flange 21 to be uniformly distributed within the plane of the packing sheets 22 and 23. As a result, gaps are less likely to form between the packing sheet 22 and the packing sheet 23, particularly enhancing watertightness.

[0094] The Young's modulus E2 of packing sheet 22 and the Young's modulus E3 of packing sheet 23 are the tensile modulus E calculated from the tensile load and elongation (strain) measured by the method specified in JIS A 6008:2022, respectively. Specifically, if the cross-sectional area of ​​the test specimen before testing is S, the tensile load is F, and the elongation when the tensile load F is applied is ε, then the tensile modulus E can be calculated as E = (F / S) / ε. The elongation ε can be calculated as ε = ΔL / L0, where L0 is the length of the test specimen before the tensile load F is applied, and ΔL is the elongation when the tensile load F is applied. Here, the tensile load F at which the elongation ε from the initial state becomes 1.5% is measured, and the tensile modulus E is calculated from this value. The measurement conditions are a temperature of 20°C, a relative humidity of 50% ± 10%, and a test speed of 200 mm / min. Furthermore, the test specimens consist of three pieces each cut in the longitudinal and widthwise directions from each raw material roll used to manufacture the packing sheets 22 and 23. The tensile modulus E is calculated for a total of six test specimens cut from each raw material roll, and the average values ​​are taken as Young's moduli E2 and E3.

[0095] Furthermore, the packing sheet 23 may be provided as needed and may be omitted. Additionally, another packing sheet may be added between the packing sheet 23 and the flange 21. In other words, the number of packing sheets may be one, two as in this embodiment, or three or more.

[0096] 2.8. Washers and spring washers The washer 24 and spring washer 25 are passed through the existing fitting 42 and stacked on the flange 21. The washer 24 is provided between the pressure nut 261 and the flange 21. The spring washer 25 prevents the pressure nut 261 from loosening. These may be provided as needed, and one or both may be omitted.

[0097] 2.9. Pressing nut (pressing tool) The pressure nuts 261 and 262 engage with the existing fitting 42 by screwing, thereby pressing the flange 21 downward (towards the resin-coated steel plate 11) via the spring washer 25 and washer 24. By using the pressure nuts 261 and 262, the pressure applied by the flange 21 can be easily adjusted, making it easy to optimize the watertightness of the packing sheets 22 and 23. Furthermore, using double nuts helps to suppress loosening. Note that the pressure nut 262 may be provided as needed and may be omitted. In addition, three or more pressure nuts may be used. Furthermore, anti-loosening nuts may be used for the pressure nuts 261 and 262. The pressure nuts 261 and 262 may be covered with resin covers using heat shrink tubing or the like as needed. This prevents loosening and rusting of the pressure nuts 261 and 262.

[0098] Furthermore, the pressing nuts 261 and 262 may be members that can engage with the existing fitting 42 in a manner other than screwing. Examples of members that engage in a manner other than screwing include members that engage with the existing fitting 42 by generating frictional force, and members that hook onto the existing fitting 42.

[0099] 3. Fixtures The fastener 50 shown in Figure 2 comprises a fastener body 52, a retaining clip 56, a washer 57, a nut 58 for fixing the arrangement, a connecting nut 73, and a connecting bolt 74.

[0100] The fixing device body 52 shown in Figure 3 has a bottom portion 521 and side portions 522. The bottom portion 521 is a plate-like portion, for example, with a rectangular shape in plan view. A hole 523 is formed in the center of the bottom portion 521, penetrating in the thickness direction. The side portions 522 are portions that rise upward from the edge of the bottom portion 521.

[0101] The bottom portion 521 is placed on the flange 21. An existing fitting 42 is inserted through the hole 523. The side portion 522 is connected to the leg portion 72 of the solar panel unit 70. Specifically, the side portion 522 and the leg portion 72 are connected using connecting bolts 74 and connecting nuts 73, as shown in Figure 2.

[0102] The retaining clip 56 shown in Figures 2 and 3 has a top portion 561, a side portion 562, and a bottom portion 563. The top portion 561 is, for example, a plate-shaped portion with a rectangular shape in plan view. A hole 564 is formed in the center of the top portion 561, penetrating in the thickness direction. The side portion 562 is a portion that slopes downward from the edge of the top portion 561. The bottom portion 563 is a portion that extends parallel to the top portion 561 from the lower end of the side portion 562.

[0103] The bottom portion 563 rests on the bottom portion 521 of the aforementioned fixing device body 52. ​​The existing fitting 42 is inserted through the hole 564. The tip of the existing fitting 42 protrudes upward from the hole 564. A washer 57 and a mounting fixing nut 58 are passed through this protruding portion. When the mounting fixing nut 58 is screwed onto the existing fitting 42 and tightened, the retaining fitting 56 can be pressed downward via the washer 57. This allows the fixing device body 52, which is sandwiched between the retaining fitting 56 and the flange 21, to be fixed to the existing fitting 42. As a result, the legs 72 of the solar panel unit 70 can be fixed to the floor portion 91 via the fixing device 50.

[0104] The configuration of the fixing device 50 is selected appropriately according to the type of object being placed, and is therefore not limited to the above configuration.

[0105] 4. Effects achieved by the above embodiment The foundation waterproofing structure 1 according to the above embodiment is a structure that provides waterproofing performance to a foundation block 40 placed on the floor portion 91 of a building frame 9 and to an existing fitting 42 protruding upward from the foundation block 40, and comprises a resin-coated steel plate 11, fixing screws 12 (fasteners), a waterproof sheet 13, a sealing portion 15, a flange 21, packing sheets 22, 23, and pressing nuts 261, 262 (pressing devices). The resin-coated steel plate 11 is molded into a shape including a concave molded portion 112 and a flange portion 113 surrounding the concave molded portion 112, the foundation block 40 is housed in the concave molded portion 112, the existing fitting 42 is passed through a through hole 115 opening in the bottom portion 112a of the concave molded portion 112, and the flange portion 113 is positioned to face the floor portion 91. The fixing screws 12 fasten the flange portion 113 to the floor portion 91. The waterproof sheet 13 is bonded or welded to the flange portion 113 and covers the floor portion 91. The sealing portion 15 is provided in the gap between the through hole 115 of the resin-coated steel plate 11 and the foundation block 40. The flange 21 is provided above the resin-coated steel plate 11 and forms an annular shape surrounding the existing fitting 42. The packing sheets 22 and 23 are provided between the flange 21 and the resin-coated steel plate 11 and form an annular shape surrounding the existing fitting 42. The pressing nuts 261 and 262 engage with the existing fitting 42, thereby pressing the flange 21 toward the resin-coated steel plate 11.

[0106] With this configuration, a foundation waterproofing structure 1 can be realized that can be constructed with fewer steps on the foundation blocks 40 and existing fittings 42 placed on the floor portion 91 of the building structure 9, and that provides excellent waterproofing performance with superior durability. Furthermore, because the resin-coated steel plate 11 has excellent mechanical strength, it can apply a pressing load to the floor portion 91 of the foundation waterproofing structure 1. This improves the seismic resistance, wind pressure resistance, and other properties of the foundation waterproofing structure 1.

[0107] In the foundation waterproofing structure 1 according to the above embodiment, the concave molded portion 112 may have a bottom portion 112a and a side wall portion 112b connecting the outer edge of the bottom portion 112a and the inner edge of the flange portion 113. The side wall portion 112b may be molded in a shape that is inclined outward from the bottom portion 112a.

[0108] With this configuration, water is less likely to accumulate between the side wall portion 112b and the flange portion 113, making it possible to realize a foundation waterproof structure 1 with good drainage.

[0109] In the foundation waterproofing structure 1 according to the above embodiment, the angle (tilting angle θ) between the bottom portion 112a and the side wall portion 112b may be greater than 90° and less than or equal to 160°.

[0110] This configuration makes it possible to realize a foundation waterproofing structure 1 with particularly good drainage. In addition, residual stress due to the molding process can be mitigated, thus suppressing the decrease in mechanical strength due to residual stress. Furthermore, the resistance of the side wall portion 112b to wind (wind pressure resistance) can be reduced, thereby improving the wind pressure resistance of the foundation waterproofing structure 1 and reducing wind noise.

[0111] In the foundation waterproofing structure 1 according to the above embodiment, the resin-coated steel plate 11 may be a PVC-coated steel plate.

[0112] With this configuration, if the waterproof sheet 13 contains a polyvinyl chloride resin, the adhesion or welding between the resin-coated steel plate 11 and the waterproof sheet 13 can be particularly enhanced.

[0113] In the foundation waterproofing structure 1 according to the above embodiment, the existing fitting 42 may be a bolt. In this case, the pressing device is preferably a nut (pressing nut 261, 262) that screws onto the bolt.

[0114] With this configuration, the pressing force by the flange 21 can be easily adjusted, making it easy to optimize the watertightness of the packing sheets 22 and 23.

[0115] In the foundation waterproofing structure 1 according to the above embodiment, it is preferable that the packing sheets 22 and 23 are made primarily of polyvinyl chloride resin.

[0116] With this configuration, packing sheets 22 and 23 with excellent water-sealing properties and durability can be obtained.

[0117] In the above embodiment of the foundation waterproofing structure 1, an insulating sheet 14 may be provided, which is laid between the floor portion 91 and the waterproofing sheet 13.

[0118] With this configuration, it is possible to suppress the migration of components contained in the waterproof sheet 13 to the waterproof layer 30 and the floor portion 91.

[0119] In the foundation waterproofing structure 1 according to the above embodiment, the waterproofing sheet 13 may overlap the flange portion 113 of the resin-coated steel plate 11.

[0120] With this configuration, a sufficiently large area can be secured for the adhesive or welded joints between the waterproof sheet 13 and the flange portion 113, thereby particularly enhancing watertightness. Furthermore, if screw holes 114 are provided in the flange portion 113, these screw holes 114 can be covered with the waterproof sheet 13, thereby suppressing water intrusion through the fixing screws 12.

[0121] In the foundation waterproofing structure 1 according to the above embodiment, the fastening device may be a fixing screw 12 that is inserted through a screw hole 114 formed in the flange portion 113 and driven into the floor portion 91.

[0122] With this configuration, the resin-coated steel plate 11 is fixed using pressing nuts 261 and 262 (pressing devices) and fixing screws 12 (fastening devices), and the existing fittings 42 and the floor section 91 are connected via the resin-coated steel plate 11, which has excellent mechanical strength. As a result, the seismic resistance, wind pressure resistance, etc. of the foundation waterproofing structure 1 can be further improved.

[0123] The foundation waterproofing structure of the present invention has been described above, but the present invention is not limited to these descriptions.

[0124] For example, the foundation waterproofing structure of the present invention may be modified by replacing each component of the above embodiment with any component that can perform a similar function, or by adding any component to the above embodiment. [Explanation of Symbols]

[0125] 1 Basic waterproof structure 9 skeleton 11 Resin-coated steel plate 12 fixing screws 13 Waterproof sheet 14. Insulating sheet 15. Sealing section 21 Flange 22 Packing sheet 23 Packing sheet 24 washers 25 Spring Washer 30 waterproof layer 40 Foundation Blocks 42 Existing fittings 44 Adhesive layer 50 Fixtures 52 Fixing device body 56 Retaining clip 57 Washer 58 Fixing nuts for the mounting components 70 Solar Panel Units 71 Solar Panel Section 72 Legs 73 Connecting nuts 74 connecting bolts 91 Floor 112 Concave molding part 112a bottom 112b Side wall part 113 Tsuba (guard) 114 screw holes 115 Through hole 116 Outer edge 117 Boundary Line 215 holes 225 holes 235 holes 261 Press Nut 262 Press Nut 521 Bottom 522 Side 523 holes 561 Top 562 Side 563 Bottom 564 holes R1 Minimum bending radius R2 Minimum bending radius S recess θ Tilt angle

Claims

1. A structure that provides waterproofing performance to foundation blocks placed on the floor portion of the building structure and to existing metal fittings protruding upward from the foundation blocks, A resin-coated steel plate is formed into a shape including a concave molded portion and a flange portion surrounding the concave molded portion, the foundation block is housed within the concave molded portion, the existing fitting is passed through a through hole opening in the bottom of the concave molded portion, and the flange portion is positioned to face the floor portion, A fastening device for fastening the flange portion to the floor portion, A waterproof sheet is bonded or welded to the flange portion and covers the floor portion, A sealing portion is provided in the gap between the resin-coated steel plate and the through hole and the foundation block, An annular flange is provided above the resin-coated steel plate and surrounds the existing fitting, A packing sheet is provided between the flange and the resin-coated steel plate, forming an annular shape that surrounds the existing fitting, A pressing tool that engages with the aforementioned existing fitting to press the flange toward the resin-coated steel plate, A foundation waterproofing structure characterized by having the following features.

2. The aforementioned concave molded portion is The bottom and, A side wall portion connecting the outer edge of the bottom portion and the inner edge of the flange portion, It has, The foundation waterproofing structure according to claim 1, wherein the side wall portion is formed in a shape that is tilted outward from the bottom portion.

3. The foundation waterproofing structure according to claim 2, wherein the angle between the bottom portion and the side wall portion is greater than 90° and less than or equal to 160°.

4. The foundation waterproofing structure according to any one of claims 1 to 3, wherein the resin-coated steel plate is a PVC-coated steel plate.

5. The aforementioned existing fitting is a bolt, The foundation waterproofing structure according to any one of claims 1 to 3, wherein the pressing device is a nut that screws onto the bolt.

6. The aforementioned packing sheet is a foundation waterproofing structure according to any one of claims 1 to 3, wherein the packing sheet is mainly made of a polyvinyl chloride resin.

7. The foundation waterproofing structure according to any one of claims 1 to 3, further comprising an insulating sheet laid between the floor portion and the waterproofing sheet.

8. The foundation waterproofing structure according to any one of claims 1 to 3, wherein the waterproofing sheet overlaps the flange portion of the resin-coated steel plate.

9. The foundation waterproofing structure according to any one of claims 1 to 3, wherein the fastening device is a fixing screw inserted through a screw hole formed in the flange and driven into the floor.

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