JP2015113637A - Fixing structure for waterproof sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of fixing a waterproof sheet tightly so that a fixing disk which fixes the waterproof sheet can withstand vertical drawing-out since upward (vertical) stress operates on the waterproof sheet when the waterproof sheet is exposed to strong wind on a roof etc., constructed to be waterproof in a mechanical fixing method.SOLUTION: A waterproof sheet fixing structure includes: a heat insulating material B laid on a waterproof substrate A; a reinforcing plate D arranged on the heat insulating material B so as to cover a part of the heat insulating material B; a reinforcing plate fixing material F for fixing the reinforcing plate D to the waterproof substrate A; and a waterproof sheet C covering the heat insulating material B. The waterproof sheet C is coupled to the reinforcing plate D, which has a coefficient of thermal expansion of 100 (×10-6/K) or less.

Description

  The present invention relates to a waterproof sheet fixing structure in a heat insulating method.

  In recent years, a heat insulating construction method in which a heat insulating material is laid on a base is often used for a waterproof structure of a building roof, a veranda, and a balcony. In the heat insulation method, a so-called mechanical fixing method is used as a method for fixing the waterproof sheet. This method is a method in which a fixing disk is fixed to the base with a fixing screw from above the heat insulating material, and the waterproof sheet is fixed on the heat insulating material with the fixing disk, which requires an adhesive to be applied. It has the advantage that it is simple compared with. And, as a method of fixing the waterproof sheet with the fixing disk, the waterproof sheet is first laid on the heat insulating material, and then the fixing disk is put on the fixing disk and the fixing screw is driven, or the bonding is performed on the heat insulating material. A fixing disk having a layer is fixed, a waterproof sheet is laid thereon, an adhesive layer is melted from above the waterproof sheet with an electromagnetic induction heating device, and the back surface of the waterproof sheet and the fixing disk are joined. Yes.

However, when the waterproof sheet is exposed to a strong wind on a rooftop waterproofed by a mechanical fixing method, upward (vertical) stress acts on the waterproof sheet. Therefore, the fixing disk for fixing the waterproof sheet is required to be firmly fixed so as to be able to resist pulling in the vertical direction. Furthermore, since the wind normally blows with a certain level and strength, there is a concern that the stress on the waterproof sheet also acts as a vibration accompanied by a strength, and that the fixing screw is loosened by this vibration.
On the other hand, there has been proposed a construction method in which a fixing screw and a fixing disk that are provided with a locking stopper are combined (Patent Document 1).

JP 2008-002123 A

However, when exposed to a strong wind, the waterproof sheet laid on the heat insulating material by the wind force may have a stress acting not only in the vertical direction but also in the horizontal direction. If it does so, the stress of a horizontal direction will act also on the fixing board and fastener which are fixing the waterproof sheet. In order to cope with this horizontal stress, a structure using a reinforcing plate connecting a plurality of fixing plates has been proposed.
In such a structure, thermal expansion of the reinforcing plate may be a problem. This is because the temperature of the reinforcing plate increases from about 20 ° C. to about 80 ° C. in the summer, and the reinforcing plate thermally expands due to this temperature increase. When the reinforcing plate is thermally expanded, the fixing plate such as a reinforcing plate fixing screw for fixing the reinforcing plate or a fastener may be subjected to horizontal stress and may be damaged.

  In addition, since the waterproof sheet is directly or indirectly connected to the reinforcing plate, there is a risk that the fixing or fastening device such as a reinforcing plate fixing screw may be damaged and the waterproof sheet may be damaged or fixed insufficiently. There is.

  Therefore, in view of the above-described problems, the present invention has an object to provide a fixing structure that prevents damage to a waterproof sheet and a decrease in fixing strength due to thermal expansion of the reinforcing plate even if the reinforcing plate is used in the heat insulating method. .

The means taken to solve the above-described problems of the present invention is a waterproof sheet fixing structure using a reinforcing plate having a predetermined thermal expansion coefficient on a heat insulating material.
More specifically, a heat insulating material laid on the waterproof base, a reinforcing plate disposed on the heat insulating material so as to cover a part of the heat insulating material, and the reinforcing plate on the waterproof base A reinforcing plate fixing material for fixing and a waterproof sheet covering the heat insulating material, the waterproof sheet is connected to the reinforcing plate, and the thermal expansion coefficient of the reinforcing plate is 100 (× 10 −6 / K). ) The waterproof sheet fixing structure is as follows.
The reinforcing plate may be provided with a plurality of through holes through which the reinforcing plate fixing material is penetrated. The waterproof sheet fixing structure according to claim 1, wherein the diameter of the through hole is that of the reinforcing plate fixing tool. It may be formed larger than the diameter.
Further, the waterproof sheet fixing structure in which the waterproof sheet is fixed by the reinforcing plate and the fixing plate disposed on the reinforcing plate, the waterproof sheet fixing structure in which the waterproof sheet is fixed by the fixing plate Also good.

  According to the waterproof sheet fixing structure of the present invention, by setting the thermal expansion coefficient of the reinforcing plate to a predetermined value or less, even if the reinforcing plate is thermally expanded, the waterproof sheet is prevented from being damaged and the fixing strength is reduced (reduced). Can do.

1 is a cross-sectional view according to a first embodiment of the present invention. It is the top view which showed arrangement | positioning of the reinforcement board of this invention. It is the top view which showed arrangement | positioning of the reinforcement board of this invention. It is the top view which showed arrangement | positioning of the reinforcement board of this invention. It is sectional drawing which concerns on 2nd Embodiment of this invention. FIG. 5 is a cross-sectional view according to the first embodiment of the present invention, and is a Y-Y ′ cross-sectional view in FIG. 4. It is sectional drawing which concerns on embodiment of this invention by which two fixing plates are arrange | positioned at one reinforcement board. It is a top view of the reinforcement board of this invention. It is an expanded sectional view of the penetration part of the reinforcement board fixing material (fastener) in a reinforcement board and a fixation board. It is an enlarged plan view of the through-hole part in a reinforcement board. It is sectional drawing which concerns on 3rd Embodiment of this invention. It is an enlarged plan view of the through-hole part in a reinforcement board.

Hereinafter, preferred embodiments will be described in detail with reference to the drawings.
In the first embodiment of FIG. 1, a heat insulating material B is laid on a waterproof base A, a reinforcing plate D is fixed on the heat insulating material B, and a waterproof sheet C is formed so as to cover the heat insulating material B and the reinforcing plate D. Laying is fixed. Here, the reinforcing plate D is fixed to the waterproof base A by the reinforcing plate fixing material F, and the waterproof sheet C connected to the reinforcing plate D is fixed to the waterproof base A.

  The waterproof sheet C is connected to the reinforcing plate D via a fixing plate E fixed on the reinforcing plate D, and is fixed to the base. In this embodiment, the waterproof sheet is joined to the back surface of the waterproof sheet C by an adhesive layer (not shown) provided on the upper surface of the fixing plate E. Here, the reinforcing plate fixing material F passes through the fixing plate E and also serves as a fastener G for fixing the fixing plate E.

By setting the thermal expansion coefficient of the reinforcing plate D to 100 (× 10 ⁻⁶ / K) or less, the horizontal stress on the reinforcing plate fixing material F can be relieved and damage to the reinforcing plate fixing material F can be prevented. Moreover, it is possible to prevent the fixing strength of the waterproof sheet C connected to the reinforcing plate D from being lowered.

  FIG. 2 is a plan view showing the arrangement of the reinforcing plates in the present embodiment. A belt-shaped reinforcing plate D1 is laid substantially parallel and fixed by a reinforcing plate fixing material F. In the example of FIG. 2, three fixing plates E are fixed to one reinforcing plate D1. FIG. 1 is a sectional view taken along the line Z-Z ′ in FIG. 2. 2 to 4 show the arrangement of the reinforcing plate and the fixing plate, and members such as the waterproof sheet C are omitted.

  Here, the reinforcing plate D is not limited to the belt shape, but may be a substantially square shape or a substantially square shape as shown in FIGS. 3 and 4, or may have another shape. Furthermore, a plurality of shapes may be used in combination, and a band shape and other shapes may be combined. In particular, since the peripheral part on the rooftop is easily affected by wind and is required to have wind pressure resistance, the arrangement of the reinforcing plates D may be changed between the peripheral part and other parts.

When the reinforcing plate D has a shape having a bent portion as shown in FIGS. 3 and 4, the reinforcing plate D may be continuously formed into a substantially square shape or a substantially square shape, or a plurality of strip shapes. The reinforcing plates D may be arranged so as to intersect vertically.
Here, FIG. 6 shows a YY ′ cross-sectional view when the reinforcing plates D are crossed. Two reinforcing plates D are arranged on the heat insulating material B, and the second reinforcing plate D 'is arranged on the first reinforcing plate D' arranged on the heat insulating material B in a direction orthogonal to the reinforcing plate D '. The reinforcing plate D ″ is provided. The fixing plate E is disposed at the intersection J of the reinforcing plate D ′ and the reinforcing plate D ″, and the reinforcing plate fixing material that also serves as the fastener G so as to penetrate the reinforcing plates D ′, D ″ and the fixing plate E. F is driven into the waterproof base A.

The reinforcing plate D may have a thermal expansion coefficient of 100 (× 10 ⁻⁶ / K) or less, preferably 60 (× 10 ⁻⁶ / K) or less, and more preferably 40 (× 10 ⁻⁶ / K) or less. Preferably, 20 (× 10 ⁻⁶ / K) or less is more preferable.

As the reinforcing plate D, a metal reinforcing plate D can be used in the present embodiment. For example, aluminum (23), iron (11.7), copper (16.6), stainless steel (17-18), cast iron (10-12), cemented carbide (5-6) can be used (parentheses). Writing is coefficient of thermal expansion × 10 ⁻⁶ / K). Moreover, if the thermal expansion coefficient is 100 (× 10 ⁻⁶ / K) or less, a plastic or ceramic material can be used. For example, polycarbonate (70 to 80), nylon (80), and polyethylene terephthalate (70) can be used (the parenthesis indicates thermal expansion coefficient × 10 ⁻⁶ / K).

  The smaller the thermal expansion coefficient of the reinforcing plate D, the smaller the change in length due to thermal expansion. Therefore, it is preferable to use a metal or ceramic system. Further, metal materials are preferable from the viewpoint of cost, strength, and workability, and iron and stainless steel are more preferable. From the point of rust prevention, it is preferable to use stainless steel. As thickness, about 0.1-5 mm is preferable, More preferably, it is 0.2 mm-2 mm, More preferably, it is 0.4 mm-0.8 mm. When using iron, it is also preferable to provide a resin layer on the surface.

  The reinforcing plate D may be provided with a through hole 2 through which the reinforcing plate fixing material F and the fastener G are penetrated in the main body 1 as shown in FIG. In FIG. 8 (a), three through holes 2 are provided in the main body 1. Further, as shown in FIG. 8B, the through hole 21 for the reinforcing plate fixing material F and the through hole 22 for the fastener G may be provided separately. In FIG. 8A, the reinforcing plate fixing material F also serves as the fastener G, and the through hole 2 is also common. The through holes 2 may be provided as many as the number of reinforcing plate fixing materials F and fasteners G penetrating the reinforcing plate D, or the number of reinforcing plate fixing materials F (fastening tools G) as shown in FIG. You may provide the through-hole 2 in more than minutes.

  Here, when the fixing plate E is arranged on the reinforcing plate D and the waterproof sheet C is fixed as shown in FIG. 7, when the reinforcing plate D expands due to a temperature change, the two fixed plates E that are connected expand. The horizontal stress due to will work. Here, by making the thermal expansion coefficient of the reinforcing plate D smaller, the length change due to the expansion becomes small, and the horizontal stress applied to the reinforcing plate fixing material F that fixes the reinforcing plate D and the fixture E can be reduced. Become. Thereby, damage to the reinforcing plate fixing material F and the like can be prevented, and the fixing strength of the waterproof sheet C can be prevented from being lowered.

  Furthermore, it is preferable that the through-hole 2 provided in the reinforcing plate D as shown in FIGS. 9 and 10 is larger than the diameter of the reinforcing plate fixing material F or the fastener G. That is, it is preferable to provide the buffer band 3 between the reinforcing plate fixing material F or the fastener G and the reinforcing plate D. As a result, even if the reinforcing plate D expands, the buffer plate 3 prevents the reinforcing plate fixing material F and the fastener G from coming into strong contact with the edge 4 of the through hole 2 of the reinforcing plate D. The horizontal stress generated can be relieved.

  Therefore, it is preferable to set the diameter of the through hole 2 in consideration of the expansion length of the reinforcing plate D calculated from the total length of the reinforcing plate D and the predicted temperature rise. Here, the thermal expansion length is calculated by multiplying the thermal expansion coefficient by the temperature change. On the waterproof base A, a temperature increase of about 60 ° C. is assumed from 20 ° C. to 80 ° C. in summer. Further, between the reinforcing plate fixing material F and the fastener G and the reinforcing plate D, the buffer band 3 adds a value obtained by multiplying the diameter of the reinforcing plate fixing material F (fastener G) by a predetermined coefficient to the thermal expansion length. It is preferable to use a value. Thereby, the horizontal stress on the reinforcing plate fixing material F (fastener G) can be more reliably reduced regardless of the direction in which the reinforcing plate D expands or the driving position of the reinforcing plate fixing material F (fastener G). It becomes possible.

  As shown in FIG. 12, the through hole 2 may have a shape in which the through hole 2 is formed longer than the diameter of the reinforcing plate fixing material F with respect to the longitudinal direction of the reinforcing plate D, and the buffer band 3 is provided in the longitudinal direction. ing.

Since the reinforcing plate fixing material F only needs to be able to fix the reinforcing plate D, it is possible to use a bonding agent such as an adhesive or an adhesive or a mechanical fixing means. From the viewpoint of workability, it is preferable to use a mechanical fixing means.
As the bonding agent, an adhesive, a double-sided pressure-sensitive adhesive tape, a regular sealer, an irregular sealer, or the like can be used. A fixed sealer such as butyl tape is preferably used because it has excellent adhesive strength and is easy to construct.

As the mechanical fixing means, reinforcing plate fixing tools such as screws, nails and screws can be used. As the material of the reinforcing plate fixture, steel materials such as carbon steel, alloy steel, and stainless steel can be used. Also, to prevent the head from protruding from the top surface of the reinforcing plate D, the screw head shape of the reinforcing plate fixture should be flat, flat, and pan, and the recessed shape of the seat surface to be hung with a screwdriver or wrench is a cross hole or hexagonal hole A square hole is preferred.
Further, the reinforcing plate fixing material F may be a reinforcing plate fixing tool such as a screw, and may also be used as a fastener G for fixing the fixing plate E.

  The waterproof sheet C is preferably a thermoplastic resin waterproof sheet, and a vinyl chloride resin, polyolefin, acrylic, or the like can be used. Furthermore, the waterproof sheet made of a vinyl chloride resin is more preferable from the viewpoint that the thermoplastic resin waterproof sheet can be joined by thermal fusion or solvent welding.

  The waterproof sheet C may be a single layer, but is preferably a multilayer product in which base layers such as glass cloth and 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 heat insulating material B, polystyrene foam, rigid urethane foam, phenol foam, polyolefin foam such as polyethylene, polypropylene, or the like can be used. In consideration of strength, a heat insulating material in which kraft paper or aluminum foil is laminated on both sides is preferable. Moreover, when it is necessary to take a gradient, a thermal insulation board with a gradient can be used.

  The fixing plate E only needs to be able to fix the waterproof sheet C, and is made of metal, hard synthetic resin, wood, or the like. Metal is preferable because of its strength and durability. As the material of the steel plate constituting the metal fixing plate E, a steel plate which is resistant to rust even in a high humidity state such as a stainless steel plate or a steel plate which has been subjected to rust prevention treatment such as zinc, aluminum, magnesium plating or zinc plating is suitable. Used for. The thickness is about 0.5 to 1.5 mm, and the shape is arbitrary, such as a rectangular plate shape that is a square or a rectangle, a circular or elliptical disk shape, a long shape, and the size is one side or The outer diameter can be formed to about 50 to 100 mm.

Moreover, the structure which laminated and integrated the thermoplastic resin coating layer on the at least upper surface of the fixing plate E is preferable. This facilitates joining with the waterproof sheet C by thermal fusion or solvent welding. Here, for the thermoplastic resin coating layer, vinyl chloride resin, polyolefin, acrylic, or the like can be used. Considering the bonding strength, it is preferable to use the same material for the waterproof sheet C and the thermoplastic resin coating layer. When the waterproof sheet is made of a vinyl chloride resin, the thermoplastic resin coating layer is also used. It is preferably made of a vinyl chloride resin.
In the present specification, the upper surface of the fixing plate E is an upper surface with respect to the waterproof base A and the heat insulating material B.

  Further, when the waterproof sheet C is laid on the fixing plate E, the adhesive layer provided on the upper surface of the fixing plate E can be provided by applying an adhesive or laminating a thermoplastic resin layer. . Then, the adhesive layer and the waterproof sheet C are bonded by pressure bonding, heat fusion, solvent welding, or the like. In the case of performing electromagnetic induction heating, the adhesive layer of the fixing plate E is preferably a hot melt adhesive layer such as a hot melt adhesive or a thermoplastic resin that melts by heating. Examples of the hot melt adhesive include polyester, polyamide, and ethylene-vinyl acetate copolymer hot melt adhesives.

  The fastener G needs to be long enough to fix at least the fixing plate E. As the material, steel materials such as carbon steel, alloy steel, and stainless steel can be used. Also, the screw head shape of the fastener G should be flat, flat, and pan so that the head does not protrude from the upper surface of the fixing plate E, and the recess shape of the seat surface to be hung with a screwdriver or wrench is a cross hole, hexagonal hole, A square hole is preferred.

  As the waterproof base A, a metal base such as concrete, ALC, folded plate roof, roof tile roof, deck plate, or the like can be used.

Next, the construction method of the first embodiment will be described with reference to FIG. The heat insulating material B is laid on the waterproof base A, and the reinforcing plate D is disposed on the heat insulating material B so as to correspond to the position where the fixing plate E is disposed. Then, the fixing plate E is placed on the reinforcing plate D, and the reinforcing plate fixing material F (fastener G) is driven through the reinforcing plate D from above the fixing plate E and driven into the waterproof base A. The reinforcing plate D and the fixing plate E is fixed. Then, a waterproof sheet C is laid from above, and the fixing plate E and the waterproof sheet C are joined.
As a method of joining the fixing plate E and the waterproof sheet C, heat fusion, liquid welding, adhesive, or the like can be used. In the first embodiment, electromagnetic induction heating is performed at a position corresponding to the fixing plate E. The fixing plate E and the waterproof sheet C are joined by heat fusion by mounting and heating the device.

Other embodiments will be described below, but the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
As a second embodiment, an embodiment using the fixing plate E from above the waterproof sheet C is shown in FIG. According to this, the heat insulating material B is laid on the waterproof base A, the reinforcing plate D is disposed thereon, and the waterproof sheet C is laid thereon. The waterproof sheet C is fixed by fixing the fixing plate E with the fastener G from above the waterproof sheet C. Further, an additional tension sheet H is laid and fixed so as to cover the fixing plate E.
Here, the fixing plate E is disposed on the reinforcing plate D and is fixed to the waterproof base A by a reinforcing plate fixing material F that also serves as a fastener G.

  As the reinforcing sheet H, a sheet similar to the waterproof sheet C can be used. Since heat sealing and welding are possible, it is preferable that the waterproof sheet C and the extension sheet H are the same type of sheet. For example, when the waterproof sheet C is a polyvinyl chloride resin-based sheet, it is preferable that the reinforcing sheet H is also a polyvinyl chloride resin-based sheet. Further, the reinforce sheet H may be formed by laminating a base material, but may be configured not to use a base material.

  Next, the construction method in 2nd Embodiment is demonstrated. The heat insulating material B is laid on the waterproof base A, and the reinforcing plate D is disposed at a position where the fixing disk 5 is disposed. Then, the waterproof sheet C is laid from above, and the fixing disk 5 is disposed on the waterproof sheet C at a position corresponding to the reinforcing plate D. A reinforcing plate fixing material F (fastener G) is driven into the waterproof base A so as to penetrate the fixing plate 5 and the reinforcing plate D, and the reinforcing plate D and the fixing plate E are fixed. Further, an additional tension sheet H is placed so as to cover the fixing plate E, and the upper surface of the fixing plate E and the waterproof sheet C are joined. In this embodiment, the reinforce sheet H, the upper surface of the fixing plate E, and the waterproof sheet C are joined by thermal fusion. The periphery of the additional tension sheet H was waterproofed with a liquid sealer I.

As a third embodiment, a waterproof sheet fixing structure for fixing the waterproof sheet C with the reinforcing plate D without using the fixing plate E is shown in FIG. According to this, the heat insulating material B is laid on the waterproof base A, the reinforcing plate D is disposed on the heat insulating material B, and the reinforcing plate D is fixed to the waterproof base A by the reinforcing plate fixing material F. The waterproof sheet C is fixed by a reinforcing plate D.
Here, in the example of FIG. 11, the waterproof sheet C is laid on the reinforcing plate D, and the waterproof sheet C is formed by an adhesive layer (not shown) provided on the upper surface of the reinforcing plate D as in the first embodiment. It is joined to the back side.
Although not shown in the figure, the waterproof sheet C may be disposed under the reinforcing plate D.

Next, the construction method of 3rd Embodiment is demonstrated. The heat insulating material B is laid on the waterproof base A, and the reinforcing plate D is disposed on the heat insulating material B so as to correspond to the position where the waterproof sheet C is fixed. Then, the reinforcing plate fixing material F is driven into the waterproof base A from above the reinforcing plate D, and the reinforcing plate D is fixed. And the waterproof sheet C is laid from the top and the reinforcement board D and the waterproof sheet C are joined.
As a method of joining the reinforcing plate D and the waterproof sheet C, joining by heat fusion, liquid welding, adhesive, or the like is possible, but in the third embodiment, electromagnetic induction heating is performed at a position corresponding to the reinforcing plate D. The reinforcing plate D and the waterproof sheet C are joined by thermal fusion by mounting and heating the device.

  In all of these embodiments, a member such as a cushioning sheet can be used.

Examples of the present invention will be described below.
FIG. 1 shows a cross-sectional view according to the first embodiment. A heat insulating material B is laid on a metal folded plate roof base A1, and a strip-like shape having a length of 2 m, a thickness of 0.6 mm, and iron (heat A reinforcing plate D1 having an expansion coefficient of 11.7 × 10 ⁻⁶ / K) is disposed. A fixing plate E having an adhesive layer made of polyvinyl chloride resin on the upper surface is disposed as a fixing plate E on the reinforcing plate D1. The fixing plate E is a circular and stainless steel fixing disc E1 having a diameter of about 87 mm, and a fixing screw F1 that penetrates the fixing disc E1 and the reinforcing plate D1 and serves as the fastener G and the reinforcing plate fixing material F is provided. It is driven into the folded plate roof base A1. A waterproof sheet C1 made of polyvinyl chloride resin is laid as a waterproof sheet C so as to cover the heat insulating material B, and the adhesive layer of the fixing disk E1 and the back surface of the waterproof sheet C1 made of polyvinyl chloride resin are heat-sealed by an electromagnetic induction device. Has been. The reinforcing plate D1 has a polyvinyl chloride resin layer laminated on the surface.

  FIG. 2 shows a plan view according to the first embodiment. The reinforcing plates D1 are arranged in parallel, and fixing disks E1, which are three fixing plates E, are fixed to one reinforcing plate D1 with fixing screws F1.

Here, the through-hole 2 is provided in the reinforcing plate D1 as shown in FIGS. The diameter 4 of the fixing screw F1 is 5.8 mm, and the diameter 5 of the through hole 2 is 8.6 mm. Assuming that the temperature of the reinforcing plate increases by 60 ° C. from 20 ° C. to 80 ° C. in summer, the expansion length of the 2 m reinforcing plate D is 1.4 mm (calculation formula: 11.7 × 10 ⁻⁶ × 60). × 2 = 0.014 m). A buffer band 3 is provided around the fixing screw F1, and this is set to twice the thermal expansion length. That is, the buffer band 3 is provided in the range of 1.4 mm × 2 = 3.8 mm with respect to the diameter 4 of the fixing screw F1, and the diameter 5 of the through hole 2 is set to 8.6 mm.
By providing a buffer band twice as large as the expansion length in this way, even if the reinforcing plate D2 expands, it prevents contact with the fixing screw F1, and prevents horizontal stress from being applied to the fixing screw F1. Is done.

Here, the buffer 3 is provided so that the diameter of the through hole 2 is a value obtained by adding a value obtained by doubling the thermal expansion length to the diameter 5 of the reinforcing plate fixture F (fastener G). The coefficient multiplied by this thermal expansion length (2 in Example 1) is preferably set to 1 to 5, and more preferably 1.5 to 3.
Hereinafter, also in Examples 2 and 3, the coefficient multiplied by the thermal expansion length is 2, and the diameter of the through hole 2 is 8.6 mm.

FIG. 5 shows a sectional view according to the second embodiment. Compared with the first embodiment, the fixing disk E2 as the fixing plate E is disposed on the waterproof sheet C1 made of polyvinyl chloride resin. The difference is that the tension sheet H and the sealer I are used from above the disk E2.
A heat insulating material B is laid on a metal folded plate roof base A1, and a 0.6 mm thick stainless steel reinforcing plate D2 is disposed thereon. A waterproof sheet C1 made of polyvinyl chloride resin is laid on the reinforcing plate D2, and a fixing disk E2, which is a fixing plate E, is disposed at a position corresponding to the reinforcing plate D2. The fixing disk E2 is made of stainless steel and has a circular shape with a diameter of 87 mm and a thickness of 0.6 mm. A polyvinyl chloride resin layer is provided on the upper surface as an adhesive layer. A fixing screw F1 that doubles as a fastener G and a reinforcing plate fixing material F is driven into the folded plate roof base A1 through the reinforcing plate D2 from above the fixing disk E2. An additional tension sheet H made of polyvinyl chloride resin is placed so as to cover the fixing disk E2, and the additional tension sheet H is thermally bonded to the polyvinyl chloride resin layer of the fixing disk E2 and the waterproof sheet C1 made of polyvinyl chloride resin. It is joined. And the waterproofing process is performed by the liquid sealer I around the tension sheet H.

  Although the top view which concerns on Example 2 was shown in FIG. 4, the strip | belt-shaped reinforcement board D2 of length 1m is arrange | positioned at the substantially square shape. In the intersecting portion J, a reinforcing plate D2 in one direction and a reinforcing plate D2 in a direction substantially perpendicular to the reinforcing plate D2 are vertically stacked. That is, at the intersection, the two reinforcing plates D2 are overlapped, and the reinforcing plates D2 are arranged in a double manner.

FIG. 11 is a sectional view according to Example 3. The third embodiment is different from the first and second embodiments in that the waterproof sheet C is fixed by the reinforcing plate D3 without using the fixing plate E.
A heat insulating material B is laid on a metal folded-plate roof base A1, and a reinforcing plate D3 made of stainless steel and having a strip shape of 2 m in length and 0.4 mm in thickness is disposed thereon. A fixing screw F1, which is a reinforcing plate fixing material F, is driven into the folded plate roof base A1 from above the reinforcing plate D3. A waterproof sheet C1 made of polyvinyl chloride resin is laid so as to cover the heat insulating material B and the reinforcing plate D3. Here, an adhesive layer made of a polyvinyl chloride resin composition is provided on the upper surface of the reinforcing plate D3, and the adhesive layer of the reinforcing plate D3 and the waterproof sheet C1 made of polyvinyl chloride resin are heated by an induction heating device. The waterproof sheet C1 made of polyvinyl chloride resin is fixed by heat-sealing.

A Waterproof base B Heat insulation material C Waterproof sheet D Reinforcement plate 1 Body 2 Through hole 3 Buffer band E Fixing plate F Reinforcement plate fixing material G Fastener

Claims (5)

A heat insulating material laid on a waterproof base;
A reinforcing plate disposed on the heat insulating material so as to cover a part of the heat insulating material;
A reinforcing plate fixing material for fixing the reinforcing plate to the waterproof base;
A waterproof sheet covering the heat insulating material,
The waterproof sheet fixing structure, wherein the waterproof sheet is connected to the reinforcing plate, and the thermal expansion coefficient of the reinforcing plate is 100 (× 10 ⁻⁶ / K) or less. The waterproof sheet fixing structure according to claim 1, wherein the reinforcing plate is provided with a plurality of through holes through which the reinforcing plate fixing material passes. The waterproof sheet fixing structure according to claim 2, wherein a diameter of the through hole is formed larger than a diameter of the reinforcing plate fixture. The waterproof sheet fixing structure according to any one of claims 1 to 3, wherein the waterproof sheet is fixed by the reinforcing plate. A fixing plate disposed on the reinforcing plate;
The waterproof sheet fixing structure according to any one of claims 1 to 3, wherein the waterproof sheet is fixed by the fixing plate.

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