Insulation and waterproof structure, construction method

Abstract

To provide a heat insulating waterproof structure capable of performing waterproofing construction more simply and in a short time by using a fixing plate and a fixing tool without adding a special member when laying and fixing a waterproof sheet on a metal roof material by a mechanical fixing method, and reducing looseness of the fixing tool by the effect of vibration by wind.SOLUTION: A heat insulating waterproof structure comprises a heat insulating material laid on a metal roof base, a waterproof sheet laid on the heat insulating material, a fixing plate having a through-hole arranged on the heat insulating material to fix the waterproof sheet on the metal roof member, and a fixing tool fixed to the metal roof member from above the fixing plate through the through-hole; a resin coating layer is provided on an upper surface of the fixing plate, the fixing tool is brought into contact with a resin coating layer of the through-hole peripheral edge part which is a peripheral edge part of the through-hole, and the fixing tool has looseness reducing means for reducing looseness at a contact part with the metal roof member.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a heat insulating and waterproof structure using a waterproof sheet for use on rooftops, roofs, verandas, etc., and a construction method thereof. [Background technology]

[0002] Traditionally, the insulation method of laying insulation material on top of roofing materials has been widely used for waterproofing structures such as building roofs, verandas, balconies, etc. In recent years, the number of buildings using roofing materials such as deck plates, roof decks, and folded-plate roofs has increased in order to reduce the weight of roofs and shorten construction time, and insulation methods are being used in particular for waterproofing structures for such roofing materials. In the thermal insulation method, the so-called mechanical fixing method is used to fix the waterproof sheet. In this method, a fixing disk is fixed to the roof material from above the insulation material with a fixing screw, and the waterproof sheet is also fixed with a fixing disk and a fixing screw. Methods of fixing the waterproof sheet with a fixing disk include a method of first laying the waterproof sheet on the insulation material, placing a fixing disk on it and driving in the fixing screw, and a method of fixing a fixing disk with an adhesive layer on the insulation material, laying the waterproof sheet on it, and melting the adhesive layer from above the waterproof sheet with an electromagnetic induction heating device to bond the back side of the waterproof sheet to the fixing disk.

[0003] However, in the mechanical fixing method, the waterproof sheet is fixed partially to the base with fixing screws and fixing disks. Therefore, when wind blows through the construction area, negative pressure creates lift on the waterproof sheet (fluttering phenomenon), and the stress on the waterproof sheet due to wind blowing with varying strengths can also act as vibrations with varying strengths. For this reason, there is concern that the fixing screws will loosen due to these vibrations. There is also concern that the fixing screws will loosen due to continuous loads placed on them by micro-vibrations generated in the building itself. Furthermore, there is concern that the fixing screws may loosen and come loose, causing the waterproof sheet to break and fly off.

[0004] In contrast, Patent Document 1 discloses a waterproof sheet fixing structure in which a plate-shaped insulating material is laid on a base made of a thin metal plate, and a waterproof sheet is attached on top of the insulating material via a fixing member, the fixing member comprising a penetration portion that penetrates the insulating material, a first mounting portion provided at the upper end of the penetration portion for attaching the waterproof sheet, and a second mounting portion provided at the lower end of the penetration portion for attaching to the base, and the second mounting portion is attached in a state that allows it to swing laterally relative to the base. Patent Document 2 discloses a waterproof sheet fixing structure in which an insulating board is placed on a waterproof base, a waterproof sheet is provided along the upper surface of the insulating board, and a fixing plate for fixing the waterproof sheet to the waterproof base is provided between the waterproof sheet and the waterproof base, and the waterproof sheet is fixed to the waterproof base by the fixing plate, the fixing plate being integrally configured to have an adhesive part that can be freely adhered to the back surface of the waterproof sheet, and a fastening part that can be freely fastened and fixed to the waterproof base, and the fastening part is positioned on the waterproof base side of the adhesive part and is fastened and fixed to the waterproof base. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-044107 A [Patent Document 2] JP 2015-048690 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the cases of Patent Documents 1 and 2, it is thought possible to prevent screws from loosening, but there is a problem that this leads to an extension of the construction period due to an increase in the number of materials used during construction and an increase in labor hours, resulting in increased construction costs. Furthermore, in the case of thin metal roof underlayment (for example, metal plate thickness of 0.8mm to 1.0mm), there is a high tendency for screws to come loose due to repeated uplift by wind and micro-vibrations, so a waterproofing structure that can be applied more easily and in a shorter time and is less likely to cause screws to come loose is required. In this way, when laying and fixing a waterproof sheet onto a metal roofing material using a mechanical fixing method, the objective is to obtain an insulating waterproof structure that allows waterproofing to be carried out more easily and in a shorter time using fixing plates and fixing devices without using additional special parts, and that reduces loosening of the fixing devices due to vibrations caused by wind. [Means for solving the problem]

[0007] The means used in the present invention to solve the above-mentioned problems is to provide means above and below the thermal insulation material for reducing loosening of the fasteners. Metal roof Material a waterproof sheet laid on the insulating material, a fixing plate having a through hole arranged on the insulating material to fix the waterproof sheet onto the metal roofing material, and a fastener fixed to the metal roofing material from above the fixing plate through the through hole, the fixing plate having a resin coating layer on the upper surface thereof, the fastener being in contact with the resin coating layer on the peripheral portion of the through hole, and the fastener having a loosening reduction means for reducing loosening at the contact portion with the metal roofing material. The loosening reduction means is a portion that is provided on the threaded portion of the fastener and that hooks onto the metal roofing material, and is a notch provided on the threaded portion. In addition, after the first waterproofing structure is applied, the second waterproofing structure can be applied in the same manner. Here, the upper surface of the fixing plate has a resin coating layer, and the portion of the fixing tool that comes into contact with the resin coating layer on the periphery of the through hole, which is the periphery of the through hole, serves as the loosening reduction means for the fixing tool above the insulation material, and the portion of the fixing tool that reduces loosening at the contact portion with the metal roof material serves as the loosening reduction means for the fixing tool below the insulation material, thereby providing the loosening reduction means for the fixing tool above and below the insulation material. 。 Ma The construction method is metal roofing. Materiala heat insulating material is laid on the metal roofing material, a waterproof sheet is laid on the heat insulating material, a fixing plate having a through hole is arranged on the heat insulating material in order to fix the waterproof sheet on the metal roofing material, a fixing tool is fixed to the metal roofing material from above the fixing plate through the through hole, a resin coating layer is provided on the upper surface of the fixing plate, the fixing tool is brought into contact with the resin coating layer on the periphery of the through hole, and the fixing tool has a loosening reduction means for reducing loosening at the contact portion with the metal roofing material. The loosening reduction means is a portion that is provided on the threaded portion of the fastener and that hooks onto the metal roofing material, and is a notch provided on the threaded portion. The construction method of the heat insulating waterproof structure can be used. Also, after the construction of the first waterproof structure, the same construction method can be used for the second waterproof structure. Effect of the Invention

[0008] When laying and fixing a waterproof sheet on a metal roofing material using a mechanical fixing method, the waterproof sheet can be fixed on the metal roofing material using a fixing plate and fixing devices without using special parts, etc., and loosening of the fixing devices due to vibration of the waterproof sheet caused by wind, etc. can be prevented. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a partial cross-sectional view of a pre-attached waterproof structure according to one embodiment of the present invention. [Diagram 2] This is a schematic diagram of a cross section omitting everything except the fixing plate, fixings, metal roofing material, and insulation material. [Diagram 3] FIG. 4 is an enlarged partial cross-sectional view of a portion of the fixing plate and the fixing device. [Figure 4] FIG. 2 is an enlarged partial cross-sectional view of a portion of the metal roofing material and fastener. [Diagram 5] FIG. 2 is an enlarged partial cross-sectional view of a portion of the metal roofing material and fastener. [Figure 6] 1 is a partial cross-sectional view of a retrofit waterproof structure according to one embodiment of the present invention. [Figure 7] FIG. 2 is a schematic plan view showing the arrangement of fixing plates in a metal roofing material. [Figure 8] FIG. 2 is a partial cross-sectional view of a pre-attached waterproof structure according to one embodiment of the present invention. [Figure 9] 1 is a partial cross-sectional view of a retrofit waterproof structure according to one embodiment of the present invention. [Figure 10] FIG. 11 is a partial cross-sectional view of a pre-applied waterproof structure in the second application according to one embodiment of the present invention. [Figure 11] FIG. 2 is a partial cross-sectional view of a waterproof structure that is retrofitted in a second construction according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The following describes two structures that are roughly classified according to the positions of the fixing plate 40 and the waterproof sheet 50 that constitute the heat insulating and waterproof structure of the present invention, with reference to Figs. Here, with the metal roofing material 10 as the reference, the side closer to the metal roofing material 10 is referred to as the lower side or bottom surface, and the side away from the metal roofing material 10 is referred to as the upper side or top surface.

[0011] In the first structure, in Fig. 1, insulation material 20 is laid on metal roofing material 10, a fixing plate 40 is placed on top of insulation material 20, and a fastener 30 is driven into metal roofing material 10 from above fixing plate 40. A waterproof sheet 50 is then laid to cover insulation material 20 and fixing plate 40, and fixing plate 40 and waterproof sheet 50 are joined together to form an insulated and waterproof structure in which waterproof sheet 50 is fixed to metal roofing material 10. A structure in which waterproof sheet 50 is laid and fixed on fixing plate 40 in this way is sometimes referred to as a pre-attached structure, and a construction method for constructing a pre-attached structure is sometimes referred to as a pre-attached construction method.

[0012] 6, the second structure is a heat insulating material 20 laid on a metal roofing material 10, a waterproof sheet 50 laid on the heat insulating material 20, a fixing plate 40 placed on top of the heat insulating material, a fastener 30 driven into the metal roofing material 10 from above the fixing plate 40, and a heat insulating and waterproof structure in which the waterproof sheet 50 is fixed to the metal roofing material 10. Furthermore, a waterproof reinforcing sheet 90 is laid so as to cover the top of the fixing plate 40, and the waterproof reinforcing sheet 90 is joined to the fixing plate 40 and the waterproof sheet 50. The waterproof reinforcing sheet 90 does not have to be joined to the fixing plate 40, but by joining them, movement of the fixing plate 40 due to vibrations or the like can be reduced, making it more difficult for the fastener 30 to loosen. This structure in which the fixing plate 40 is placed on the waterproof sheet 50 and the waterproof sheet 50 is fixed in place is sometimes referred to as a retrofit structure, and the construction method for constructing the retrofit structure is sometimes referred to as a retrofit construction method.

[0013] 2 shows only the metal roofing material 10, the insulating material 20, the fixing plate 40, and the fixing device 30, which are common to Fig. 1 and Fig. 6, and omits other components, and explains the relationship between the fixing device 30, the fixing plate 40, and the metal roofing material 10. The fixing device 30 is fixed at two points, the fixing plate 40 and the metal roofing material 10. The fixing device 30 is provided with loosening reduction means at two points, an upper part U and a lower part L, for improving the fixation between the fixing plate 40 and the metal roofing material 10 and reducing loosening of the fixing device 30. 3 shows an enlarged view of the upper part U where the fixing plate 40 and the fastener 30 in FIG. 2 are fixed, and a loosening reduction means in the upper part U will be described. A resin coating layer 41 is formed on the upper surface of the fixing plate 40 facing the metal roofing material 10. The fixing plate 40 is provided with a through hole 42 for passing the fastener 30 through. If the periphery of the through hole 42 is the through hole peripheral part 43, the fastener 30 and the through hole peripheral part 43 of the fixing plate 40 are in contact with each other. When the fastener 30 is driven into the metal roofing material 10, the fastener 30 comes into contact with the through hole peripheral part 43 and is pressed against the resin coating layer 41 provided on the through hole peripheral part 43, so that the fastener 30 is more firmly fixed to the fixing plate 40, and loosening due to vibration or the like is less likely to occur.

[0014] 2 and 3, the fixing device 30 has a screw head 31, a threaded portion 32, and a screw tip, the screw head 31 having a larger diameter than the threaded portion 32, and a recessed portion provided on the upper surface of the screw head 31 for receiving a bit such as a screwdriver. The threaded portion 32 is formed with a helical thread. The fixing plate 40 has a recessed portion provided on the periphery 43 of the through hole for accommodating the screw head 31 of the fixing device 30, and is formed so that the upper surface of the fixing plate 40 and the upper surface of the screw head 31 are substantially flush with each other. Here, as shown in Figures 1 and 6, when the fastener 30 is inserted through the top of the fixing plate 40 and then driven into the metal roofing material 10 while rotating it with a screwdriver or the like, the underside 31a of the screw head 31 of the fastener 30 comes into contact with the resin coating layer 41 on the peripheral portion 43 of the through hole, which is formed as a recess, and the two are pressed against each other, resulting in a stronger fixation due to frictional force, making it less likely to loosen due to vibration, etc. A resin coating layer 41 is formed on the peripheral portion 43 of the through hole, so that the resin coating layer 43 is deformed by the force exerted when the fastener 30 is driven into the underside 31a of the screw head 31 of the fastener 30, thereby bringing the through hole peripheral portion 43 and the screw head 31 into close contact with each other. Furthermore, the through-hole periphery 43 is formed as a recess so that the screw head 31 is accommodated in accordance with the shape of the screw head 31 and the upper surface of the fixing plate 40 is substantially flush with the upper surface of the screw head 31, so that the through-hole periphery 43 formed as a recess and the lower surface 31a of the screw head 31 are pressed more strongly against each other. This increases the frictional force and makes it less likely for the screw head 31 to come loose due to vibration or the like.

[0015] Next, the lower portion L where the fastener 30 penetrates the metal roofing material 10 in Fig. 2 will be described. In the lower portion L, the fastener 30 is driven into the metal roofing material 10, and the fastener 30 and the metal roofing material 10 are engaged and fixed. Here, the fastener 30 is provided with a "loosening reduction means" that improves the engagement with the metal roofing material 10 and reduces the loosening of the fastener 30. The loosening reduction means can be a means for increasing the adhesion between the metal roofing material 10 and the fastener 30, or a means for strengthening the hook between the fastener 30 and the metal roofing material 10, etc.

[0016] The means for increasing the adhesion between the metal roofing material 10 and the fastener 30 will be described with reference to Figure 4. By providing a resin layer between the metal roofing material 10 and the fastener 30, the metal roofing material 10 and the fastener 30 are pressed tightly together, and the increased frictional force makes it less likely for the material to come loose. More specifically, as shown in Fig. 4, a resin coating layer 41 is provided around the threaded portion 32. The resin coating layer 41 may be provided only on the portion that contacts the metal roofing material 10, or the resin coating layer 41 may be provided on the entire threaded portion 32. It is also preferable not to provide the resin coating layer 41 on the tip of the screw.

[0017] A means for strengthening the hook between the fastener 30 and the metal roofing material 10 will be described with reference to FIG. 5. As shown in FIG. 5-2, a notch 32V is provided in the thread 32S of the screw part 32 of the fastener 30, and when the fastener 30 is driven into the metal roofing material 10, the notch 32V forms a hook with the metal roofing material 10, and the fastener 30 is firmly fixed to the metal roofing material 10, thereby preventing the fastener 30 from loosening due to vibration, etc. The notch 32V may be any as long as it can prevent reverse rotation due to vibration, etc., and make the fastener 30 difficult to pull out. In the example of FIG. 5-1, at the lower part of the metal roofing material 10, the notch 32V hooks with the lower end surface of the metal roofing material 10, and the thread 32S is deeply hooked on the metal roofing material 10, thereby preventing the fastener 30 from loosening due to vibration, etc.

[0018] In an embodiment of the present invention, as shown in Fig. 2, a means for preventing loosening at upper and lower positions by sandwiching the insulating material is used for one fastener 30. This makes it possible to more effectively prevent loosening of the fastener 30 than by providing a strong lock at one position. Also, a more effective locking effect can be obtained by locking at two positions separated by a distance according to the thickness of the insulating material. Furthermore, in addition to increasing the adhesion at the contact portion between the fixing device 3 and the fixing plate 40 on the upper side of the insulation and preventing the fixing device 30 from loosening due to vibration, etc. by friction, the hook between the metal roofing material 10 and the fixing device 30 is strengthened and reverse rotation is suppressed to prevent loosening due to vibration, etc. In this case, by using different loosening prevention means on the top and bottom, even if one is in a situation where it is prone to loosening, the other is expected to effectively exhibit the function of preventing loosening and reducing it, and this is a preferred embodiment because it is possible to more effectively reduce loosening.

[0019] Next, the pre-attaching structure and the post-attaching structure according to the embodiment of the present invention will be described in more detail. 1 and 8 show an embodiment of a pre-attached structure. A plate-shaped insulation material 20 is laid on a folded-plate roof 11, which is a metal roof material 10, and a metal fixing plate 40 is placed on the insulation material 20, and fixing screws 35 are driven into the folded-plate roof 11 as fixing devices 30 from above the fixing plate 40. A waterproof sheet 50' made of thermoplastic resin, which is a waterproof sheet, is laid to cover the insulation material 20 and the fixing plate 40, and the fixing plate 40 and the waterproof sheet 50' are joined to form an insulation waterproof structure in which the waterproof sheet 50' is fixed to the folded-plate roof 11. A resin coating layer 41 is provided on the upper surface of the fixing plate 40, and the resin coating layer 41 is joined to the thermoplastic resin layer on the lower surface of the waterproof sheet 50'. In this embodiment, the resin coating layer 41 and the thermoplastic resin layer on the back surface of the waterproof sheet 50' are formed from the same type of thermoplastic resin layer, and the resin coating layer 41 and the thermoplastic resin layer on the back surface of the waterproof sheet 50' are thermally fused together by heating, thereby joining and fixing the waterproof sheet 50' to the upper surface of the fixing plate 40.

[0020] The fastener 30 is provided with loosening reduction means at two locations, an upper portion U and a lower portion L (FIG. 2) of the heat insulating material 20. In this embodiment, as shown in FIG. 3, a resin coating layer 41 is provided on the upper surface of the fixing plate 40, and a through hole 42 is provided for passing the fastener 30 from the upper surface of the fixing plate 40. A through hole peripheral portion 43, which is the periphery of the through hole 42, is formed as a recess according to the shape of the screw head 31 of the fixing screw 35, and the through hole peripheral portion 43 is also coated with the resin coating layer 41. The fixing screw 35 is driven in while being rotated with a screwdriver or the like, so that the resin coating layer 41 at the through hole peripheral portion 43 and the fixing screw 35 are fixed in a state of tighter adhesion with less gap and friction. Furthermore, the fixing screw 35 has a notch 32v in the thread 32s as shown in Fig. 5. In the lower portion L (Fig. 2), the notch 32V catches on the underside of the metal roofing material 10, preventing the fixing screw 35 from loosening.

[0021] Fig. 8 shows a modified example of the embodiment in Fig. 1. The differences from Fig. 1 will be described with reference to Fig. 8. A buffer sheet 70 is provided between the heat insulating material 20 and the rear surface of the waterproof sheet 50, and a fixed plate buffer material 80 is provided between the buffer sheet 70 and the fixed plate 40.

[0022] Next, Fig. 6 and Fig. 9 show an embodiment of a retrofit structure. A plate-shaped insulation material 20 is laid on a folded-plate roof 11, which is a metal roof material 10, and a waterproof sheet 50' made of thermoplastic resin, which is a waterproof sheet, is laid on the insulation material 20. A metal fixing plate 40 is placed on the waterproof sheet 50', and fixing screws 35 as fixing devices 30 are driven into the folded-plate roof 11 through the waterproof sheet 50' from above the fixing plate 40. A waterproof reinforcing sheet 90 is laid on top of the fixing plate 40 so as to correspond to the shape of the fixing plate 40 and cover the entire fixing plate 40, and the upper surface of the fixing plate 40 and the lower surface of the waterproof reinforcing sheet 90 are joined. In this way, the fixing plate 40 is fixed to the metal roof material 10 from above the waterproof sheet 50' with the fixing screws 35, which are fixing devices 30. In addition, the waterproof reinforcement sheet 90 is formed larger than the fixed plate 40 so as to cover the entire fixed plate 40, and the edge portion of the waterproof reinforcement sheet 90 contacts the waterproof sheet 50', and the edge portion of the waterproof reinforcement sheet 90 and the waterproof sheet 50' are joined. In this embodiment, a resin coating layer 41 is provided on the upper surface of the fixed plate 40, and the resin coating layer 41 is joined to the thermoplastic resin layer on the lower surface of the waterproof reinforcement sheet 90. Furthermore, the resin coating layer 41 and the thermoplastic resin layer on the back surface of the waterproof reinforcement sheet 90 are formed of the same type of thermoplastic resin layer, and the waterproof reinforcement sheet 90 is joined and fixed to the upper surface of the fixed plate 40 by heat-sealing the resin coating layer 41 and the thermoplastic resin layer on the back surface of the waterproof reinforcement sheet 90 by heating. Similarly, the waterproof reinforcement sheet 90 and the waterproof sheet 50' are formed of a thermoplastic resin layer and are joined to each other by heat fusion. In order to bond more strongly, it is preferable that the waterproof reinforcement sheet 90 and the waterproof sheet 50' are made of the same type of thermoplastic resin.

[0023] Furthermore, in this embodiment, a fixing plate reinforcing sheet 60 is provided between the waterproof sheet 50' and the fixing plate 40. The fixing plate reinforcing sheet 60 has a suitable degree of flexibility, and in this embodiment is formed of a thermoplastic resin layer, which prevents the waterproof sheet 50' from being damaged when the fixing plate 40 and the fixing device 30 are used to fix the waterproof sheet 50' to the metal roof material 10, and further prevents the fixing device 30 from becoming loose due to the fixing plate 40 moving due to vibration or the like caused by the fixing plate 40 being in close contact with the waterproof sheet 50' and increasing friction. In this embodiment, the fixed plate reinforcing sheet 60 and the waterproof sheet 50' are joined together, which makes it easier to suppress the movement of the fixed plate 40 and better prevents the fastener 30 from loosening. The fixed plate reinforcing sheet 60 and the waterproof sheet 50' are made of a thermoplastic resin composition and are joined together by thermal fusion. The fixed plate reinforcing sheet 60 and the waterproof sheet 50' can also be joined together by liquid welding.

[0024] Here, the joining of the fixed plate 40 and the waterproof reinforcing sheet 90, the joining of the waterproof reinforcing sheet 90 and the waterproof sheet 50', and the joining of the fixed plate reinforcing sheet 60 and the buffer sheet 70 may be performed by thermal fusion using heat or by liquid welding using a solvent.

[0025] The fastener 30 is provided with loosening reduction means at two locations, an upper portion U and a lower portion L (FIG. 2) of the thermal insulation material 20. In this embodiment, as shown in FIG. 3, a resin coating layer 41 is provided on the upper surface of the fixing plate 40, and a through hole 42 is provided for passing the fastener 30 from the upper surface of the fixing plate 40. A through hole peripheral portion 43, which is the periphery of the through hole 42, is formed as a recess according to the shape of the screw head 31 of the fixing screw 35, and the through hole peripheral portion 43 is also coated with the resin coating layer 41. By driving the fixing screw 35 while rotating it with a screwdriver or the like, the resin coating layer 41 at the through hole peripheral portion 43 and the screw 35 are fixed in a state of close contact with no gaps and friction is generated. As shown in Fig. 4, the fixing screw 35 has a resin coating layer 41 on the threaded portion 32. In the lower portion L (Fig. 2), the resin coating layer 41 of the threaded portion 32 is tightly adhered to the metal roofing material 10, increasing the frictional force and preventing the fixing screw 35 from loosening.

[0026] A pre-attaching method, which is a construction method for a pre-attached structure, will be described with reference to Figure 1. Insulation material 20 is laid on top of metal roofing material 10, a fixing plate 40 is placed on top of insulation material 20, and fixing device 30 is driven into metal roofing material 10 from above fixing plate 40. Waterproof sheet 50 is then laid to cover insulation material 20 and fixing plate 40, and fixing plate 40 and waterproof sheet 50 are joined together. The pre-attaching method results in an insulated and waterproof structure in which waterproof sheet 50 is fixed to metal roofing material 10.

[0027] A more specific embodiment of the present invention will be described with reference to FIG. 8. In the construction method of the embodiment of FIG. 8, a plate-shaped insulation material 20 is laid on a folded-plate roof 11, which is a metal roof material 10, and a buffer sheet 70 is laid on the insulation material 20. A fixed plate buffer material 80 is placed at the position where the fixing plate 40 of the buffer sheet 70 is to be installed, and the fixing plate 40 is placed on the fixed plate buffer material 80, and the fixing screw 35, which is the fixing tool 30, is driven into the metal roof material 10 from above the fixing plate 40. Then, a waterproof sheet 50' made of thermoplastic resin, which is a waterproof sheet, is laid so as to cover the insulation material 20 and the fixing plate 40, and the fixing plate 40 and the waterproof sheet 50' are joined. Here, a resin coating layer 41 is provided on the upper surface of the fixing plate 40, and the resin coating layer 41 is joined to the thermoplastic resin layer on the lower surface of the waterproof sheet 50'. In this embodiment, the resin coating layer 41 and the thermoplastic resin layer on the back surface of the waterproof sheet 50' are formed of the same type of thermoplastic resin layer. An electromagnetic induction heating device is placed at a position corresponding to the fixing plate 40 of the waterproof sheet 50', and the metal fixing plate 40 is heated by oscillation, thermally fusing the resin coating layer 41 and the thermoplastic resin layer on the back surface of the waterproof sheet 50'.

[0028] The fastener 30 is provided with loosening reduction means at two locations, an upper portion U and a lower portion L (FIG. 2) of the thermal insulation material 20. In this embodiment, as shown in FIG. 3, a resin coating layer 41 is provided on the upper surface of the fixing plate 40, and a through hole 42 is provided for passing the fastener 30 from the upper surface of the fixing plate 40. A through hole peripheral portion 43, which is the periphery of the through hole 42, is formed as a recess according to the shape of the screw head 31 of the fixing screw 35, and the through hole peripheral portion 43 is also coated with the resin coating layer 41. By driving the fixing screw 35 while rotating it with a screwdriver or the like, the resin coating layer 41 at the through hole peripheral portion 43 and the screw 35 are fixed in a state of closer contact with no gaps and friction is generated. Furthermore, the fixing screw 35 has a notch 32v in the thread 32s as shown in Fig. 5. In the lower portion L (Fig. 2), the fixing screw 35 is driven in while being rotated with a screwdriver or the like, so that the notch 32V is caught on the underside of the metal roofing material 10, preventing the fixing screw 35 from loosening.

[0029] A retrofit construction method, which is a construction method for a retrofit structure, will be described with reference to FIG. 6. A heat insulating material 20 is laid on a metal roofing material 10, and a waterproof sheet 50 is laid on the heat insulating material 20. A fixing plate 40 is placed on top of the heat insulating material 20, and a fastener 30 is driven into the metal roofing material 10 from above the fixing plate 40. This results in a heat-insulated and waterproof structure in which the waterproof sheet 50 is fixed to the metal roofing material 10. Furthermore, a waterproof reinforcing sheet 90 is laid so as to cover the top of the fixing plate 40, and the waterproof reinforcing sheet 90 is joined to the fixing plate 40 and the waterproof sheet 50. The waterproof reinforcing sheet 90 does not need to be joined to the fixing plate 40, but by joining them, the movement of the fixing plate 40 due to vibration or the like can be reduced, making it more difficult for the fastener 30 to loosen.

[0030] A specific embodiment of the present invention will be described with reference to FIG. 9. A plate-shaped insulation material 20 is laid on a folded-plate roof 11, which is a metal roof material 10, a buffer sheet 70 is laid on the insulation material 20, and a waterproof sheet 50' made of thermoplastic resin, which is a waterproof sheet, is laid on the buffer sheet 70. A fixing plate reinforcing sheet 60 is placed on the waterproof sheet 50' at the position where the fixing plate 40 is to be placed. The fixing plate reinforcing sheet 60 has a moderate flexibility, and in this embodiment is formed of a thermoplastic resin layer, and when the fixing plate 40 and the fixing tool 30 are fixed to the metal roof material 10, the waterproof sheet 50' is prevented from being damaged, and further, the fixing plate 40 is in close contact with the waterproof sheet 50' and friction increases, which prevents the fixing plate 40 from moving due to vibration, etc., and the fixing tool 30 from becoming loose. Then, a metal fixing plate 40 is placed on the waterproof sheet 50' and on the fixing plate reinforcing sheet 60, and fixing screws 35 as fixing devices 30 are driven into the folded plate roof 11 through the waterproof sheet 50' from above the fixing plate 40. A waterproof reinforcing sheet 90 is laid on top of the fixing plate 40 so as to correspond to the shape of the fixing plate 40 and cover the entire fixing plate 40, and the upper surface of the fixing plate 40 and the lower surface of the waterproof reinforcing sheet 90 are joined. In this way, the waterproof sheet 50' is fixed to the metal roof material 10 by the fixing plate 40 and the fixing screws 35 as the fixing device 30. The waterproof reinforcing sheet 90 is formed larger than the fixing plate 40 so as to cover the entire fixing plate 40, and the edge portion of the waterproof reinforcing sheet 90 contacts the waterproof sheet 50' and joins the edge portion of the waterproof reinforcing sheet 90 to the waterproof sheet 50'. In this embodiment, a resin coating layer 41 is provided on the upper surface of the fixed plate 40, and the resin coating layer 41 is bonded to the thermoplastic resin layer on the lower surface of the waterproof reinforcement sheet 90. Furthermore, the resin coating layer 41 and the thermoplastic resin layer on the back surface of the waterproof reinforcement sheet 90 are formed of the same type of thermoplastic resin layer, and the waterproof reinforcement sheet 90 is bonded and fixed to the upper surface of the fixed plate 40 by heat-sealing the resin coating layer 41 and the thermoplastic resin layer on the back surface of the waterproof reinforcement sheet 90. Similarly, the waterproof reinforcement sheet 90 and the waterproof sheet 50' are formed of a thermoplastic resin layer and are bonded to each other by heat fusion. For stronger bonding, it is preferable that the waterproof reinforcement sheet 90 and the waterproof sheet 50' are made of the same type of thermoplastic resin.

[0031] In this embodiment, by joining the fixed plate reinforcing sheet 60 and the waterproof sheet 50', it is easier to suppress the movement of the fixed plate 40, and it is possible to further prevent the fastener 30 from loosening. The fixed plate reinforcing sheet 60 and the waterproof sheet 50' are made of a thermoplastic resin composition and are joined by heat fusion.

[0032] Here, the joining of the fixed plate 40 and the waterproof reinforcing sheet 90, the joining of the waterproof reinforcing sheet 90 and the waterproof sheet 50', and the joining of the fixed plate reinforcing sheet 60 and the buffer sheet 70 may be performed by heat fusion or liquid welding using a solvent.

[0033] The fastener 30 is provided with loosening reduction means at two locations, an upper portion U and a lower portion L (FIG. 2) of the thermal insulation material 20. In this embodiment, as shown in FIG. 3, a resin coating layer 41 is provided on the upper surface of the fixing plate 40, and a through hole 42 is provided for passing the fastener 30 from the upper surface of the fixing plate 40. A through hole peripheral portion 43, which is the periphery of the through hole 42, is formed as a recess according to the shape of the screw head 31 of the fixing screw 35, and the through hole peripheral portion 43 is also coated with the resin coating layer 41. By driving the fixing screw 35 while rotating it with a screwdriver or the like, the resin coating layer 41 at the through hole peripheral portion 43 and the screw 35 are fixed in a state of close contact with no gaps and friction is generated. As shown in Fig. 4, the fixing screw 35 has a resin coating layer 41 on the threaded portion 32. In the lower portion L (Fig. 2), the resin coating layer 41 of the threaded portion 32 is tightly adhered to the metal roofing material 10, increasing the frictional force and preventing the fixing screw 35 from loosening.

[0034] The present invention can also be used in the case of second or subsequent waterproofing construction after the first waterproofing construction. The pre-attached construction and the post-attached construction may be constructed in any order, and may be used in combination of a pre-attached construction followed by a pre-attached construction, a pre-attached construction followed by a post-attached construction, a post-attached construction followed by a pre-attached construction, or a pre-attached construction followed by a pre-attached construction. Furthermore, in the first waterproofing construction, the waterproof sheet can be fixed using an adhesive method, and then the pre-attachment method or post-attachment method of the present invention can be applied.

[0035] Here, in the repair method, a new waterproof structure is provided on top of the existing waterproof structure. Therefore, it is difficult to provide a measure to reduce loosening of the fasteners 30 in the vicinity of the metal roofing material 10. It is possible to remove part or all of the existing waterproof layer and provide a measure to reduce loosening of the fasteners 30 in the vicinity of the metal roofing material 10, but this is a method that is difficult to adopt in practice in terms of time and cost due to the increase in labor, materials, and waste. Therefore, the structure of the present invention in which the loosening reduction means is provided above and below the insulation 20 has the effect of reducing loosening of the fastener 30 while preventing an increase in labor, materials, and waste. Furthermore, since the loosening reduction means at the lower portion of the insulation 20 is provided on the fastener 30, it is preferable because loosening reduction can be performed on the metal roof material 10 even in the second or subsequent repair methods.

[0036] A waterproof structure in the case where a pre-attached structure is provided for the second or subsequent times after the construction of the first waterproof structure will be described with reference to FIG. 10. The first pre-attached structure can be the same as that shown in FIG. 1 and FIG. 8, but a different configuration or structure may be used. In the case where a pre-attached structure is used in the first construction as shown in FIG. 10, the insulating material 20 is laid on the folded plate roof 11, which is a metal roof material 10, and the first fixing plate 46, which is a fixing plate, is placed on the insulating material 20, and the first fixing screw 36, which is a fixing tool, is driven into the folded plate roof 11 from above the fixing plate 40. Then, the first waterproof sheet 51, which is a waterproof sheet, is laid so as to cover the insulating material 20 and the first fixing plate 46, and the first fixing plate 46 and the first waterproof sheet 51 are joined together. It is not necessary to use the first buffer sheet 71 and the first fixing plate buffer material 61 during the first construction. Also, in the first pre-attaching construction method, it is not necessary to use a loosening reduction means for the first fixing screw 36 used as the first fixing tool, but it is preferable to use one or both of the means.

[0037] The second pre-attaching structure will be described below. A second buffer sheet 72 is laid on top of the first waterproof sheet 51 as a buffer sheet. A second fixing plate buffer material 82 is placed on top of the second buffer sheet 72 at the position where the second fixing plate 47 will be placed, and a metal second fixing plate 47 is placed on top of the second fixing plate buffer material 82. A second fixing screw 37 is driven into the folded plate roof 11 as a fixing device 30 from above the second fixing plate 47. Here, a fixed plate is placed at a position corresponding to the peak of the folded plate roof 11, and a second fixed plate 47 is placed on the peak that does not overlap with the first fixed plate 46. FIG. 7 shows the position where the fixed plate 40 is placed in a plan view of the folded plate roof 11. Note that FIG. 7 illustrates the arrangement of the fixed plate 40 with respect to the folded plate roof 11, and does not show the fixed plate 40 being placed directly on the folded plate roof 11. As shown in FIG. 7, the first fixed plate 46 and the second fixed plate 47 may be arranged alternately, and in one cross section perpendicular to the longitudinal direction of the folded plate roof 11, the first fixed plate 46 and the second fixed plate 47 are alternately arranged on the peak portion 11a of the folded plate roof 11.

[0038] A second waterproof sheet 52' made of a thermoplastic resin, which is a waterproof sheet, is laid so as to cover the top of the second fixing plate 47, and the second fixing plate 47 and the second waterproof sheet 52' are joined together. Here, a resin coating layer 41 is provided on the upper surface of the second fixing plate 47, and the resin coating layer 41 is joined to the thermoplastic resin layer on the lower surface of the second waterproof sheet 52'. In this embodiment, the resin coating layer 41 and the thermoplastic resin layer on the back surface of the second waterproof sheet 52' are formed of the same type of thermoplastic resin layer. An electromagnetic induction heating device is placed at a position corresponding to the second fixing plate 47 of the second waterproof sheet 52', and the metal second fixing plate 47 is heated by oscillating, and the resin coating layer 41 and the thermoplastic resin layer on the back surface of the second waterproof sheet 52' are heat-sealed.

[0039] The fixture 30 uses a second fixing screw 37 as a fixing screw. The second fixing screw 37 is provided with a loosening reduction means at two locations, an upper portion U and a lower portion L (FIG. 2) of the heat insulating material 20. In this embodiment, as shown in FIG. 3, a resin coating layer 41 is provided on the upper surface of the second fixing plate 47, and a through hole 42 is provided for passing the second fixing screw 37 from the upper surface of the second fixing plate 47. A through hole peripheral portion 43, which is the periphery of the through hole 42, is formed as a recess according to the shape of the screw head 31 of the second fixing screw 37, and the through hole peripheral portion 43 is also coated with the resin coating layer 41. By driving the second fixing screw 37 while rotating it with a screwdriver or the like, the resin coating layer 41 of the through hole peripheral portion 43 and the second fixing screw 37 are fixed in a state of closer contact with each other with less gaps and friction. Further, the second fixing screw 37 has a notch 32v in the thread 32s as shown in Fig. 5. In the lower portion L (Fig. 2), the notch 32V catches on the underside of the metal roofing material 10, preventing the second fixing screw 37 from loosening.

[0040] When a pre-installation structure is performed after a post-installation structure, the structure can be the same as the second post-installation structure shown in Fig. 10. In this case, the position of the fixing plate 40 is shifted from the position of the first fixing plate of the post-installation structure to the position of the second fixing plate of the pre-installation method, as shown in Fig. 7.

[0041] A waterproof structure in the case where a retrofit structure is provided after the first waterproof structure is constructed will be described with reference to FIG. 11. The first retrofit structure can be the same as that in FIG. 6 and FIG. 9, but a different configuration and structure may be used. In the case where a retrofit structure is provided the first time as in FIG. 11, a heat insulating material 20 is laid on a folded plate roof 11 which is a metal roof material 10, and a first waterproof sheet 51 which is a waterproof sheet 50 is laid on the heat insulating material 20, a first fixing plate 46 which is a fixing plate 40 is arranged on top of the heat insulating material 20, and a first fixing screw 36 which is a fixing tool 30 is driven into the metal roof material 10 from above the first fixing plate 46. A first waterproof reinforcing sheet 91 is laid so as to cover the top of the first fixing plate 46, and the first waterproof reinforcing sheet 91 is joined to the first fixing plate 46 and the first waterproof sheet 51. In addition, in the first retrofit structure, the first fixing screw 36 used as the first fixing device does not need to use a loosening reduction means, but it is preferable to use a loosening reduction means in either or both of the upper and lower parts.

[0042] The second retrofit structure will be described below. A second buffer sheet 72 is laid as a buffer sheet on the first waterproof sheet 51 already laid, and a second waterproof sheet 52' made of thermoplastic resin, which is a waterproof sheet, is laid on the second buffer sheet 72. Then, a second fixing plate reinforcing sheet 62 is placed on the second waterproof sheet 52' at a position where the second fixing plate 47 is to be placed so as not to overlap with the first fixing plate 46, and the second fixing plate reinforcing sheet 62 and the second waterproof sheet 52' are joined. The second fixing plate 47 is placed on the second fixing plate reinforcing sheet 62, and the second fixing screw 37, which is a fixing tool, is driven into the folded plate roof 11 through the second fixing plate 47. A second waterproof reinforcing sheet 92 is laid so as to cover the second fixing plate 47. Here, the first fixing plate 46 and the second fixing plate 47 are arranged so as to be offset so as not to overlap, and the first fixing plate 46 and the second fixing plate 47 may be arranged so as to be alternated as shown in Figure 7. In Figure 11, in a cross section perpendicular to the longitudinal direction of the folded plate roof 11, the first fixing plate 46 and the second fixing plate 47 are arranged alternately on the peak portion of the folded plate roof 11.

[0043] The second waterproof reinforcement sheet 92 is formed larger than the second fixed plate 47 so as to cover the entire second fixed plate 47, and the edge portion of the second waterproof reinforcement sheet 92 contacts the second waterproof sheet 52', and the edge portion of the second waterproof reinforcement sheet 92 and the second waterproof sheet 52' are joined. In this embodiment, a resin coating layer 41 is provided on the upper surface of the second fixing plate 47, and the resin coating layer 41 is joined to a thermoplastic resin layer on the lower surface of the second waterproof reinforcement sheet 92 by heat fusion. Similarly, the second waterproof reinforcement sheet 92 and the second waterproof sheet 52' are formed of thermoplastic resin layers and joined to each other by heat fusion. For stronger bonding, the resin coating layer 41 of the second fixing plate 47, the second waterproof reinforcement sheet 92, and the second waterproof sheet 52' are preferably made of the same type of thermoplastic resin composition. The second fixing plate reinforcing sheet 62 and the second waterproof sheet 52' are made of thermoplastic resin layers, and may be joined by heat welding or liquid welding.

[0044] Here, the joining of the second fixing plate 47 and the second waterproof reinforcement sheet 92, the joining of the second waterproof reinforcement sheet 92 and the second waterproof sheet 52', and the joining of the second waterproof reinforcement sheet 92 and the second buffer sheet 72 may be performed by thermal fusion using heat or liquid welding using a solvent.

[0045] The fastener 30 is provided with a loosening reduction means at two locations, an upper portion U and a lower portion L (FIG. 2) of the heat insulating material 20. In this embodiment, as shown in FIG. 3, a resin coating layer 41 is provided on the upper surface of the second fixing plate 47, and a through hole 42 is provided for passing the second fixing screw 37 from the upper surface of the second fixing plate 47. A through hole peripheral portion 43, which is the periphery of the through hole 42, is formed as a recess according to the shape of the screw head 31 of the second fixing screw 37, and the through hole peripheral portion 43 is also coated with the resin coating layer 41. By driving the second fixing screw 37 while rotating it with a screwdriver or the like, the resin coating layer 41 at the through hole peripheral portion 43 and the second fixing screw 37 are fixed in a state of closer contact with each other with less gaps and friction. As shown in Fig. 4, the fixing screw 35 has a resin coating layer 41 on the threaded portion 32. In the lower portion L (Fig. 2), the resin coating layer 41 of the threaded portion 32 is tightly adhered to the metal roofing material 10, increasing the frictional force and preventing the fixing screw 35 from loosening.

[0046] Even if the first installation is a pre-attached structure, it can be the same structure as the second installation in Fig. 11. In this case, the position of the fixing plate 40 is shifted between the first fixing plate of the post-attached structure and the second fixing plate of the pre-attached structure, as shown in Fig. 7.

[0047] A construction method in which the pre-attaching method is carried out a second time after the first construction will be described. When using the first pre-attaching method, it can be carried out in the same manner as in Figures 1 and 8. Then, the second pre-attaching method will be explained using Figure 10. Note that, when using the post-attaching method for the first time, the same construction method can be carried out. The second buffer sheet 72, which is a buffer sheet, is laid on the first waterproof sheet 51, and the second fixed plate 47 is placed on the second buffer sheet 72 as the fixed plate 40 to be newly installed. The second fixed plate buffer material 82 is placed in advance on the second buffer sheet 72, which is the position where the second fixed plate 47 is to be placed. Here, the second fixed plate 47 is installed by shifting the position of the first fixed plate 46. In the embodiment of FIG. 10, in a cross section in one direction perpendicular to the longitudinal direction of the folded plate roof, which is the metal roof material 10, the second fixed plate 47 is placed on a mountain part other than the mountain part where the first fixed plate 46 is placed. The second fixing tool 37, which is a fixing tool, is driven into the folded plate roof 11 from above the second fixed plate 47. Then, the second waterproof sheet 52', which is a thermoplastic resin-based waterproof sheet, is laid so as to cover the second fixed plate 40. Here, a resin coating layer 41 is provided on the upper surface of the second fixing plate 47, and the resin coating layer 41 is bonded to the thermoplastic resin layer on the lower surface of the second waterproof sheet 52'. In this embodiment, the resin coating layer 41 and the thermoplastic resin layer on the back surface of the second waterproof sheet 52' are formed of the same type of thermoplastic resin layer. An electromagnetic induction heating device is placed at a position corresponding to the second fixing plate 47 of the second waterproof sheet 52', and the metal second fixing plate 47 is heated by oscillating, and the resin coating layer 41 and the thermoplastic resin layer on the back surface of the second waterproof sheet 52' are thermally fused together. The second fixing plate reinforcing sheet 62 and the second waterproof sheet 52' are made of thermoplastic resin layers, and may be joined by heat welding or liquid welding.

[0048] The fixture 30 uses a second fixing screw 37' as a fixing screw. The second fixing screw 37' is provided with a loosening reduction means at two locations, an upper portion U and a lower portion L (FIG. 2) of the heat insulating material 20. In this embodiment, as shown in FIG. 3, a resin coating layer 41 is provided on the upper surface of the second fixing plate 47, and a through hole 42 is provided for passing the second fixing screw 37' from the upper surface of the second fixing plate 47. A through hole peripheral portion 43, which is the periphery of the through hole 42, is formed as a recess according to the shape of the screw head 31 of the second fixing screw 37', and the through hole peripheral portion 43 is also coated with the resin coating layer 41. By driving the second fixing screw 37' while rotating it with a screwdriver or the like, the resin coating layer 41 of the through hole peripheral portion 43 and the second fixing screw 37' are fixed in a state of close contact with each other with less gaps and friction. Further, the second fixing screw 37' has a notch 32v in the thread 32s as shown in Fig. 5. In the lower portion L (Fig. 2), the notch 32V catches on the underside of the metal roofing material 10, preventing the second fixing screw 37' from loosening.

[0049] The case where a retrofit construction method is used for the second or subsequent waterproofing construction after the first waterproofing construction is performed will be described with reference to Fig. 11. When a retrofit construction method is used for the first time, it can be the same as Fig. 6 and Fig. 9, but a different configuration and construction method may be used.

[0050] The second buffer sheet 72 is laid on the first waterproof sheet 51 that was laid in the first pre-attaching construction method, and the second waterproof sheet 52' made of thermoplastic resin, which is a waterproof sheet, is laid on the second buffer sheet 72. Then, the second fixing plate reinforcing sheet 62 is provided on the second waterproof sheet 52'. The second fixing plate reinforcing sheet 62 is placed at the position where the fixing plate is to be placed, and the second fixing plate 47, which is a metal fixing plate, is placed on the second fixing plate reinforcing sheet 62. Then, the second fixing screw 37 is driven into the folded plate roof 11 as the fixing device 30 from above the second fixing plate 47 through the second waterproof sheet 52'. The second waterproof reinforcing sheet 92 is laid on top of the second fixing plate 47 so as to correspond to the shape of the second fixing plate 47 and cover the entire second fixing plate 47, and the upper surface of the second fixing plate 47 and the lower surface of the second waterproof reinforcing sheet 92 are joined. In this way, the second waterproof sheet 52' is fixed to the metal roof material 10, that is, the folded plate roof 11, by the second fixing plate 47 and the second fixing screw 37, that is the fixing device 30, from above. A resin coating layer 41 is provided on the upper surface of the second fixing plate 47, and the resin coating layer 41 is joined to a thermoplastic resin layer on the lower surface of the second waterproof reinforcement sheet 92. In this embodiment, the resin coating layer 41 and the thermoplastic resin layer on the back surface of the second waterproof reinforcement sheet 92 are formed of the same type of thermoplastic resin layer, and the resin coating layer 41 and the thermoplastic resin layer on the back surface of the second waterproof reinforcement sheet 92 are thermally fused together by heating, thereby joining and fixing the second waterproof reinforcement sheet 92 to the upper surface of the second fixing plate 47.

[0051] The fastener 30 is provided with a loosening reduction means at two locations, an upper portion U and a lower portion L (FIG. 2) of the heat insulating material 20. In this embodiment, as shown in FIG. 3, a resin coating layer 41 is provided on the upper surface of the second fixing plate 47, and a through hole 42 is provided for passing the second fixing screw 37 from the upper surface of the second fixing plate 47. A through hole peripheral portion 43, which is the periphery of the through hole 42, is formed as a recess according to the shape of the screw head 31 of the second fixing screw 37, and the through hole peripheral portion 43 is also coated with the resin coating layer 41. By driving the second fixing screw 37 while rotating it with a screwdriver or the like, the resin coating layer 41 at the through hole peripheral portion 43 and the second fixing screw 37 are fixed in a state of closer contact with each other with less gaps and friction. As shown in Fig. 4, the fixing screw 35 has a resin coating layer 41 on the threaded portion 32. In the lower portion L (Fig. 2), the resin coating layer 41 of the threaded portion 32 is tightly adhered to the metal roofing material 10, increasing the frictional force and preventing the fixing screw 35 from loosening.

[0052] In the pre-attached structure in Fig. 8 and the post-attached structure in Fig. 9, the fastener 30 is driven into the fixing plate 40, and adhesive S for the screw head 31 is applied to the upper surface of the screw head 31 of the fastener 30, and then a waterproof sheet 50 or a waterproof reinforcing sheet 90 is laid on top of that, thereby further reducing loosening of the fastener 30. Since the adhesive S for the screw head is applied from the upper surface of the screw head 31 to part of the upper surface of the fixing plate 40, reverse rotation of the fastener 30 can be reduced. Screw head adhesive S can also be used for subsequent installations.

[0053] The metal roofing material 10 may be a deck plate or a roof deck, in addition to the folded plate roof shown in Fig. 1. The metal may be iron, stainless steel, copper, aluminum, etc., and it is preferable to use stainless steel because it is resistant to rust. When the metal roofing material 10 is made of a metal plate, particularly when the thickness of the metal plate is the joint with the fastener 30 as in a folded plate roof, if the thickness of the metal plate is thin, the fixed portion with the fastener 30 is thin, so that loosening due to vibration is more likely to occur, and when loosening occurs, the fastener 30 is more likely to be pulled out. Therefore, when the thickness of the metal plate is thin, it is important to use the loosening reduction means of the present invention on both the upper and lower sides of the insulation material 20. That is, by reducing loosening on both sides of the upper and lower parts, the fastener 30 can be effectively prevented from loosening. Since the thickness of the metal plate is thin especially in the lower part, loosening can be more effectively reduced by providing a resin coating layer as shown in FIG. 4 or by providing a notch 32v in the screw part 32 as shown in FIG. 5. A thin metal plate is, for example, 0.8 mm to 1.5 mm thick, but when the thickness is 0.8 mm to 1.2 mm or 0.8 mm to 1.0 mm, the loosening reduction means of the present invention is more effective in reducing loosening of fastener 30.

[0054] The heat insulating material 20 may be made of general materials such as polystyrene foam, polyethylene foam, urethane foam, phenol foam, etc. Heat insulating materials with facings may also be used, in which case the facings may be made of general materials such as kraft paper, thin aluminum films such as aluminum foil, nonwoven glass fabric, nonwoven polyester fabric, etc., or a combination of these materials. The thickness of the insulating material used is 25 mm to 150 mm. Furthermore, when the insulating material is 25 mm or thicker, the position of the fixing plate 40 is farther away than when the insulating material 20 is thin, and the fixing device 30 becomes more likely to loosen due to the moment, so that by providing the loosening reduction means of the present invention above and below the insulating material 20, the loosening of the fixing device 30 can be effectively reduced.

[0055] The fixing plate 40 is used to more stably fix the waterproof sheet 50 to the metal roofing material 10. For this reason, it is preferable that the fixing plate 40 has a suitable rigidity and strength, and is made of metal, resin, wood, etc. From the viewpoint of rigidity and strength, the fixing plate 40 is preferably made of metal. A resin coating layer 41 is provided on the upper surface of the fixing plate 40. The resin coating layer 41 may be a thermoplastic resin layer or an adhesive layer. When a thermoplastic resin layer is used, a polyvinyl chloride resin-based, vulcanized rubber-based, non-vulcanized rubber-based, thermoplastic elastomer-based, ethylene vinyl acetate resin-based, or the like may be used. When the waterproof sheet is a polyvinyl chloride resin-based waterproof sheet, it is preferable that the resin coating layer 41 is also made of a polyvinyl chloride resin-based composition, since this improves the bonding strength and makes it easier to perform heat fusion or liquid welding.

[0056] The fastener 30 may be a screw, a bolt, a nail, etc. The material may be steel, such as carbon steel, alloy steel, or stainless steel.

[0057] A thermoplastic resin-based waterproof sheet is preferably used as the waterproof sheet 50, and a polyvinyl chloride resin-based, vulcanized rubber-based, non-vulcanized rubber-based, thermoplastic elastomer-based, ethylene vinyl acetate resin-based, etc. waterproof sheet can be used. A polyvinyl chloride resin-based waterproof sheet is particularly preferably used from the viewpoints of flexibility, weather resistance, and the ease and sufficient bonding of waterproof sheets to each other or to other members. The waterproof sheet 50 may be a single layer of thermoplastic resin, but is preferably a multi-layer product in which a base layer such as glass cloth, glass nonwoven fabric, polyester cloth, or polyester nonwoven fabric is laminated, because of its excellent dimensional stability and tensile strength. The base layer may be provided as the bottom layer, or may be provided in the middle of the thermoplastic resin layers. The thermoplastic resin layer may be a single layer or multiple layers, and each layer may have a different composition.

[0058] The fixing plate reinforcing sheet 60 and the waterproof reinforcing sheet 90 are preferably made of a thermoplastic resin-based waterproof sheet, and can be made of a polyvinyl chloride resin-based, vulcanized rubber-based, non-vulcanized rubber-based, thermoplastic elastomer-based, ethylene vinyl acetate resin-based, or other waterproof sheet. A polyvinyl chloride resin-based waterproof sheet is particularly preferred because of its flexibility, weather resistance, and the fact that the waterproof sheets can be easily and sufficiently joined to each other or to other members. The joining can be done by heat fusion or liquid welding. The fixing plate reinforcing sheet 60, the waterproof reinforcing sheet 90, and the thermoplastic resin layer may be single layers, but from the viewpoint of excellent dimensional stability and tensile strength, a multi-layer product in which a base material layer such as glass cloth, glass nonwoven fabric, polyester cloth, or polyester nonwoven fabric is laminated is preferable. The base material layer may be provided as the bottom layer, or may be provided between the thermoplastic resin layers. The thermoplastic resin layer may be one layer or multiple layers, and each layer may have a different composition. It is particularly preferable to use polyvinyl chloride resin-based sheets for the waterproof sheet 50, the fixing plate reinforcing sheet 60, and the waterproof reinforcing sheet 90, as these sheets are flexible, weather resistant, and can be easily and sufficiently joined to each other or to other components.

[0059] The buffer sheet 70 is used to prevent problems such as deterioration and hardness change caused by the transfer of compositions between the waterproof sheet and other layers due to direct contact between the waterproof sheet and other layers. In particular, when a layer using a polyvinyl chloride resin composition is used, when a polyvinyl chloride resin waterproof sheet is used, the buffer sheet 70 is used to prevent the migration of plasticizers contained in the polyvinyl chloride resin composition to other layers, such as insulating materials. The buffer sheet 70 is preferably made of a thermoplastic resin, but may be made of paper, thin metal film, woven fabric, or nonwoven fabric as long as it can prevent the composition from transferring between layers. When using a polyvinyl chloride resin waterproof sheet, it is preferable to use a polyolefin resin.

[0060] The fixed plate cushioning material 80 is disposed under the fixed plate 40 in the pre-attaching method, and is used to reduce the heat melting of the insulating material 20 disposed under the fixed plate 40 when the fixed plate 40 is heated. Therefore, the fixed plate cushioning material 80 may be made of paper, synthetic resin, wood, woven fabric, or nonwoven fabric as long as it can reduce the transfer of heat to the insulating material. In addition, the fixed plate cushioning material 80 can improve the adhesion of the fixed plate 40 to the lower layer and prevent the fixed plate 40 from rotating or vibrating. Paper is preferably used because of its low cost and sufficient heat insulating properties.

[0061] The adhesive S for screw heads is an adhesive, pressure sensitive adhesive, sealer, sealing material, etc. that has appropriate fluidity, flexibility, adhesiveness, and tackiness. Sealing materials, especially modified silicone-based sealing materials, are preferred. EXAMPLES

[0062] As Example 1, construction was carried out using the following members in Fig. 8 using a pre-attached structure. The metal roofing material 10 was a folded plate roof 11 with a metal plate thickness of 0.8 mm, the heat insulating material 20 was urethane foam, the fastener 30 was a fixing screw having a resin coating layer 32a made of a polyvinyl chloride resin composition on the screw portion 32, the fixing plate 40 was a stainless steel circular disk having a resin coating layer 41 made of a polyvinyl chloride resin composition on the upper surface, the waterproof sheet 50 was a polyvinyl chloride resin waterproof sheet in which a base material was laminated between layers made of a polyvinyl chloride resin composition, the buffer sheet was a polyethylene buffer sheet in which a polyethylene cloth was laminated on a polyethylene foam sheet, the fixing plate reinforcing sheet was a paper sheet, and a modified silicone sealant was used as a screw head adhesive.

[0063] As Example 2, construction was carried out using the following members in Fig. 9 using a retrofit structure. Only members different from Example 1 will be described. The thickness of the metal plate of the folded plate roof 11 was 1 mm, the reinforcing sheet for the fixing plate was a polyvinyl chloride resin-based sheet made of a polyvinyl chloride resin-based composition, and the waterproof reinforcing sheet was a polyvinyl chloride resin-based sheet made of a polyvinyl chloride resin-based composition.

[0064] Although the waterproof structures in Examples 1 and 2 are obtained by a single application, the waterproof structures can also be obtained by the same application as in Examples 1 and 2 in the second and subsequent applications. [Industrial Applicability]

[0065] According to the present invention, in a heat insulating and waterproof structure for a metal deck roof, a waterproof structure can be obtained that ensures high wind pressure resistance using less material. [Explanation of symbols]

[0066] 10 Metal roofing materials 20. Insulation 30 Fixtures 40 Fixed plate 50 Tarpaulin 60 Reinforcement sheet for fixed plate 70 Cushioning Sheet 80 Fixed plate cushioning material 90 Waterproof Reinforcement Sheet

Claims

1. Insulation laid on top of the metal roofing material; A waterproof sheet laid on the insulating material; a fixing plate having a through hole that is placed on the insulation material to fix the waterproof sheet on the metal roofing material; A fastener is fixed to the metal roofing material through the through hole from above the fixing plate; Equipped with The fixing plate has a resin coating layer on an upper surface thereof, and the fixing tool is in contact with the resin coating layer on a peripheral portion of the through hole, the peripheral portion being a peripheral portion of the through hole; An insulating and waterproof structure having a loosening reduction means for reducing loosening at the contact portion with the metal roofing material in the fastener, the loosening reduction means being a portion that hooks onto the metal roofing material and is provided in the threaded portion of the fastener, and being a notch provided in the threaded portion.

2. A waterproof sheet laid on a first waterproof structure having an insulating material laid on a metal roofing material and a waterproof sheet laid on the insulating material; A fixing plate having a through hole that is placed on the first waterproofing structure to fix the waterproof sheet on the metal roofing material; A fastener is fixed to the metal roofing material through the through hole from above the fixing plate; Equipped with The fixing plate has a resin coating layer on an upper surface thereof, and the fixing tool is in contact with the resin coating layer on a peripheral portion of the through hole, the peripheral portion being a peripheral portion of the through hole; A second installed insulating waterproof structure, in which the fastener has a loosening reduction means for reducing loosening at the contact portion with the metal roofing material, the loosening reduction means being a portion provided in the threaded portion of the fastener that hooks onto the metal roofing material, and being a notch provided in the threaded portion.

3. a resin coating layer is provided on an upper surface of the fixing plate, and a portion where the fixing tool comes into contact with the resin coating layer on the periphery of the through hole, which is the periphery of the through hole, is a loosening reduction means for the fixing tool above the thermal insulation material; The portion of the fastener that reduces loosening at the contact portion with the metal roofing material is a loosening reduction means of the fastener below the insulation material, The heat-insulating and waterproof structure according to claim 1 or 2, further comprising means for reducing loosening of the fasteners above and below the insulating material.

4. The heat-insulating and waterproof structure according to claim 1 , wherein the fixing plate is disposed on the heat-insulating material, and the waterproof sheet is laid and fixed on the fixing plate.

5. The insulating waterproof structure according to any one of claims 1 to 3, further comprising a waterproof reinforcing sheet, the waterproof sheet being laid on the insulating material, and a fixing plate being placed on the waterproof sheet and covering the fixing plate.

6. Lay insulation on top of metal roofing material, A waterproof sheet is laid on the heat insulating material, a fixing plate having a through hole is placed on the insulation material to fix the waterproof sheet on the metal roof material; A fastener is fixed to the metal roofing material through the through hole from above the fixing plate, a resin coating layer is provided on an upper surface of the fixing plate, and the fixing tool is brought into contact with the resin coating layer on a peripheral portion of the through hole, the peripheral portion being a peripheral portion of the through hole; A construction method for an insulating waterproof structure, wherein the fastener has a loosening reduction means for reducing loosening at the contact portion with the metal roofing material, the loosening reduction means being a portion that hooks onto the metal roofing material and is provided on the threaded portion of the fastener, and a notch provided on the threaded portion.

7. A waterproof sheet is laid on the first waterproof structure having a thermal insulation material laid on the metal roof material and a waterproof sheet laid on the thermal insulation material; A fixing plate having a through hole is placed on the first waterproof structure to fix the waterproof sheet on the metal roofing material; A fastener is fixed to the metal roofing material through the through hole from above the fixing plate, a resin coating layer is provided on an upper surface of the fixing plate, and the fixing tool is brought into contact with the resin coating layer on a peripheral portion of the through hole, the peripheral portion being a peripheral portion of the through hole; A method for constructing a second insulating waterproof structure, the fastener having a loosening reduction means for reducing loosening at the contact portion with the metal roofing material, the loosening reduction means being a portion provided on the threaded portion of the fastener that hooks onto the metal roofing material, and being a notch provided on the threaded portion.

Images