JP2024117667A - Sheet roofing material - Google Patents

Abstract

To solve the problem of discarding roofing materials even when they have not deteriorated, because conventional roofing materials are difficult to remove in a reusable state, and it is less costly to prepare new roofing materials than to take the time and effort to remove them in a reusable state.SOLUTION: The plate-shaped roofing material of the present invention has a roof structure in which the fastening material is fixed to the roof substrate using screws. The working width dimension of the plate-shaped roofing material is half the design unit dimension of the building, the horizontal projection dimension of the working length is half the working width dimension, the working length dimension is the horizontal projection dimension of the working length multiplied by the gradient elongation rate for each gradient, the roofing materials are shifted by half the working width dimension for each step in the flow direction, the water stop part is in contact with the top surface of the roofing, the water drain part is separated from the top surface of the roofing, standardized shape roofing materials of a standardized shape are arranged on all roof edges, all the roof edges having second fastening holes, and the fastening material of the standardized shape roofing material is fixed to the roof substrate using screws.SELECTED DRAWING: Figure 1

Description

The present invention relates to a technical field related to roof structures using sheet-shaped roofing materials, and in the sheet-shaped roofing material roof structure, a roofing sheet is laid on the roof base of a sloped building roof, a sheet-shaped roofing material is laid directly on the roofing sheet, and a fastening material is fixed to the roof base using screws. In the sheet-shaped roofing material roof structure, a plurality of first fastening holes are provided at the rear end of the sheet-shaped roofing material, and a water-stopping portion is provided on the underside of the sheet-shaped roofing material for each of the first fastening holes, the water-stopping portion is provided on both ends of the water-stopping portion, the working width dimension of the sheet-shaped roofing material is half the design unit dimension of the building, the horizontal projection dimension of the working length of the sheet-shaped roofing material is half the working width dimension, and the working length dimension is calculated by multiplying the horizontal projection dimension of the working length by the gradient elongation rate for each slope of the roof. The dimensions are set according to the roofing material, and when the plate-shaped roofing material is laid, the head side of the upper plate-shaped roofing material is placed on the tail side of the lower plate-shaped roofing material in the flow direction, and the sides of the adjacent plate-shaped roofing materials are placed in contact with each other in the girder direction, and the plate-shaped roofing materials are placed with half the working width dimension for each stage in the flow direction, the water stopper part is in contact with the upper surface of the roofing, the water drainage part is separated from the upper surface of the roofing, and standardized roofing materials of a standardized shape are placed at all roof edges such as the ridge part, corner ridge part, eaves part, three-way part, hipped ridge difference part, and valley part, and the standardized roofing material has a second fastening hole, and the fastening material of the standardized roofing material is fixed to the roof base using the screws.

The prior art, Patent Document 1, is a roof structure of Japanese Utility Model Publication No. 8-6907. This patent document relates to an arrangement structure of roof panels made of natural stone, which is a plate-shaped roofing material.
A proposal has been made for an arrangement structure for roof panels made of natural stone, a plate-shaped roofing material, which comprises multiple roof panels placed on a roof surface, a joint panel having an L-shaped cross section and a water flow groove on its upper surface, nails for fixing the roof panels and joint panels to the roof surface, and double-sided adhesive tape, in which the roof panels are arranged so that their side ends abut each other horizontally, the joint panels are arranged so that their L-shaped rising parts engage with the upper ends of the roof panels on the undersides of the abutting parts of the roof panels, the nails are driven into both upper edges of the roof panels to fix the roof panels and joint panels to the roof surface, and the double-sided adhesive tape is attached horizontally along the nails so as to cover the upper surfaces of the nails, forming a horizontal row on the roof, and multiple rows of this horizontal row are arranged from the bottom to the top of the roof surface so that the lower ends of the roof panels and joint panels overlap with the double-sided adhesive tape portion of the previous row.

Publication No. 8-6907

Patent document 1 relates to a roof panel arrangement structure made of natural stone, a plate-shaped roofing material, which is composed of multiple roof panels placed on the roof surface, a joint panel with an L-shaped cross section and a water flow groove on its upper surface, nails for fixing the roof panels and joint panels to the roof surface, and double-sided adhesive tape, the roof panels are arranged so that their side ends abut each other horizontally, the joint panels are arranged on the underside of the abutting parts of the roof panels so that their L-shaped rising parts engage with the upper ends of the roof panels, the nails are driven into both upper edges of the roof panels to fix the roof panels and joint panels to the roof surface, the double-sided adhesive tape is attached horizontally along the nails so as to cover the upper surfaces of each nail, forming a horizontal row on the roof, and the horizontal row is arranged in multiple rows from the bottom to the top of the roof surface so that the lower ends of the roof panels and joint panels overlap with the double-sided adhesive tape part of the front row. This structure prevents rainwater from seeping in through the joints between the roof panels from reaching the roof surface, and by eliminating the need to stack three roof panels, it reduces the number of roof panels, eliminates the uneven thickness of the triple-layered sections of conventional roof panels made of natural stone, seals nail joints with double-sided adhesive tape to improve waterproofing, and prevents roof panels from falling off due to cracks in the roof panels, etc.

In the arrangement structure of roof panels made of natural stone, which is a plate-shaped roofing material, in Patent Document 1, the nails that secure the roof panels are driven into both upper edges of the roof panels so as to secure the roof panels and joint panels to the roof surface, and the double-sided adhesive tape is attached horizontally along the nails so as to cover the upper surfaces of each nail, forming a row in the horizontal direction of the roof, and this horizontal row is provided in multiple rows from the bottom to the top of the roof surface so that the lower ends of the roof panels and joint panels overlap with the double-sided adhesive tape in the previous row, thereby improving waterproofing performance and improving the fixing performance of the roof material, but waterproofing performance from the top surface of the roof panels decreases due to deterioration of the double-sided adhesive tape over time.
When the waterproofing performance from the top surface of the roof panel deteriorates and rainwater blows into the underside of the roof material, the blown-in rainwater penetrates the top surface of the roof, flows down the underside of the roof material toward the eaves, and then penetrates into the roof underlayment through the nail holes for the nails that secure the roof panel and run down the nails driven into the roof surface.
In addition, while roofing materials made from natural stone are inherently highly durable, when they are attached to the roof, the roof panels are fastened with nails and the top of each nail is covered with double-sided adhesive tape, making it difficult to remove the roofing materials in a state where they can be reused. As it is less costly to prepare new roofing materials than to go through the laborious effort of removing them in a state where they can be reused, the practice is to discard the roofing materials even if they have not deteriorated.
This idea of mass production, mass consumption, and mass disposal was common sense at the time Patent Document 1 was invented, but as a result, it has now developed into various environmental problems such as climate change, the depletion of natural resources, and the destruction of biodiversity due to large-scale resource extraction.
In order to realize a transition from one-way economic and social activities such as mass production, mass consumption, and mass waste to a "circular economy" that uses resources sustainably, there is a need for roofing materials that aim to maximize product value, minimize resource consumption, and prevent waste generation.

The present invention provides a roof structure using plate-shaped roofing materials, in which roofing is provided on a roof foundation of a sloped building roof, plate-shaped roofing materials are laid directly on the roofing, and fastening materials are fixed to the roof foundation using screws. The plate-shaped roofing materials are provided with a plurality of first fastening holes at the tail end thereof, and a water stopper is provided on the underside of each of the first fastening holes at the tail end thereof relative to the first fastening holes, and drainage portions are provided at both ends of the water stopper, the working width dimension of the plate-shaped roofing materials is half the design unit dimension of the building, the horizontal projection dimension of the working length of the plate-shaped roofing materials is half the working width dimension, and the working length dimension is a dimension obtained by multiplying the horizontal projection dimension of the working length by the gradient elongation rate for each slope of the roof, and when the plate-shaped roofing materials are laid, The head sides of the upper tier of plate-shaped roofing materials are arranged overlapping each other and arranged so that the sides of adjacent plate-shaped roofing materials abut in the girder direction, with half the working width dimension shifted for each tier in the flow direction, the water-stopping portion contacts the upper surface of the roofing, the water drainage portion is spaced from the upper surface of the roofing, and standardized-shaped roofing materials of a standardized shape are arranged at all roof edges such as the ridge portion, corner ridge portion, eaves portion, three-way portion, hipped ridge difference portion and valley portion, the standardized-shaped roofing material has a second fastening hole, and the fastening material of the standardized-shaped roofing material is fixed to the roof base using the screw, thereby providing a plate-shaped roofing material in which, even if rainwater blows into the underside of the roofing material, rainwater will not penetrate into the inside of the sheathing board from the first fastening hole on the underside of the roofing material through the screw which is the fastening material.
Traditionally, when roofing materials were fastened directly to the roof underlayment, using screws as fastening materials would create large holes in the roofing at the threads of the screws, creating a technical problem where the roofing was unable to completely waterproof rainwater that got behind the roofing material.
For this reason, roofing materials that are attached directly to the roof underlayment are fixed using nails rather than screws.
However, when roofing materials are fastened with nails, it is difficult to remove them in a state where they can be reused, and it is less costly to prepare new roofing materials than to take the time and effort to remove them in a state where they can be reused. Therefore, even if the roofing materials have not deteriorated, they are discarded and new roofing materials are produced and provided to meet new demand, which leads to problems such as global warming due to greenhouse gas emissions, resource depletion, and environmental destruction due to disposal.
Furthermore, in conventional roof structures, the processed shape of the sheet-shaped roofing materials placed at the roof edges was different for each edge, and in order to reuse the roofing materials at the roof edges, it was necessary to record for each roofing material at the roof edge where it had been used and to place it in that position when it was reused.
This is an extremely time-consuming task, and in reality it would be less costly to use new tiles and re-roof the area.
In conventional roof structures, reusing processed roofing materials on the edges of a roof required a great deal of work to re-roof the roof, and the cost of the work required for reuse was greater than the cost of using new tiles.

The roof structure of the plate-shaped roofing material of the present invention described in claim 1 is a roof structure of a building roof having a slope, in which a roofing is provided on a roof base of the roof of the building, a plate-shaped roofing material is directly laid on the roofing, and a fastening material is fixed to the roof base using screws. In the roof structure of the plate-shaped roofing material, a plurality of first fastening holes are provided on the tail side of the plate-shaped roofing material, a water stopper is provided on the underside of each of the first fastening holes on the tail side of the first fastening holes, and drainage parts are provided on both ends of the water stopper, the working width dimension of the plate-shaped roofing material is half the design unit dimension of the building, the horizontal projection dimension of the working length of the plate-shaped roofing material is half the working width dimension, and the working length dimension is a gradient elongation ratio of the horizontal projection dimension of the working length for each slope of the roof. When the plate-shaped roofing material is laid, the head side of the upper plate-shaped roofing material is placed on the tail side of the lower plate-shaped roofing material in the flow direction, and the sides of the adjacent plate-shaped roofing materials are placed in contact with each other in the girder direction, and the plate-shaped roofing materials are placed with a shift of half the working width dimension for each stage in the flow direction, the water stopper part is in contact with the upper surface of the roofing, the water drainage part is separated from the upper surface of the roofing, and standardized-shaped roofing materials of a standardized shape are placed on all roof edges such as the ridge part, corner ridge part, eaves part, three-way part, hipped ridge difference part, and valley part, and the standardized-shaped roofing material has a second fastening hole, and the fastening material of the standardized-shaped roofing material is fixed to the roof base using the screws.

The present invention described in claim 2 is characterized in that in the roof structure using the plate-shaped roofing material described in claim 1, the material of the plate-shaped roofing material and the standardized shape plate-shaped roofing material is ceramic.

The present invention described in claim 3 is characterized in that, in the roof structure of the plate-shaped roof material described in claim 1, the water drainage portion is provided on both sides of the first fastening hole on the underside at a position spaced apart from the first fastening hole for each of the first fastening holes.

According to the present invention, in a roof structure using plate-shaped roofing materials, a roofing sheet is laid on a roof foundation of a building having a slope, and a plate-shaped roofing material is laid directly on the roofing sheet, and a fastening material is fixed to the roof foundation using screws. A plurality of first fastening holes are provided on the tail side of the plate-shaped roofing material, and a water stopper is provided on the underside of each of the first fastening holes on the tail side of the first fastening holes, and drainage portions are provided on both ends of the water stopper. The working width dimension of the plate-shaped roofing material is half the design unit dimension of the building, the horizontal projection dimension of the working length of the plate-shaped roofing material is half the working width dimension, and the working length dimension is a dimension obtained by multiplying the horizontal projection dimension of the working length by the gradient elongation rate for each slope of the roof, and when the plate-shaped roofing material is laid, In the flow direction, the head side of the upper plate-shaped roofing material is placed on the tail side of the lower plate-shaped roofing material, and the sides of the adjacent plate-shaped roofing materials are placed in contact with each other in the girder direction, with half the working width dimension shifted for each stage in the flow direction, the water-stopping portion is in contact with the upper surface of the roofing, the water drainage portion is spaced from the upper surface of the roofing, and standardized shaped roofing materials of a standardized shape are placed at all roof edges such as the ridge portion, corner ridge portion, eaves portion, three-way portion, hipped ridge difference portion and valley portion, and the standardized shaped roofing material has a second fastening hole, and the fastening material of the standardized shaped roofing material is fixed to the roof base using the screws, thereby improving waterproof performance against rainwater being blown in by wind and rain.
In the present invention, primary waterproofing is performed using a plate-shaped roofing material, and secondary waterproofing is performed using roofing.
During a storm, the first waterproofing alone is not enough to completely prevent rainwater from entering, so if rainwater blows into the roofing material deep inside the roofing material, it is necessary for the waterproofing performance to be able to smoothly drain the rainwater on the roofing material out to the eaves side without allowing it to seep into the roof underlayment through holes in the fastening material.
The plate-shaped roofing material of the present invention has a plurality of first fastening holes at the tail end, and a water-blocking portion above water is provided at the tail end of the underside of each of the first fastening holes.
By using screws as fastening materials, the water-stopping part of the plate-shaped roofing material is firmly adhered to the top surface of the roofing when the plate-shaped roofing material is fixed to the roof base, and rainwater that blows onto the roofing on the back side of the roofing material is completely stopped by the water-stopping part.
Rainwater will no longer penetrate the screws that secure the plate-shaped roofing material on the below-water side of the water-stopping section, and as a result, rainwater will no longer penetrate into the interior of the roof underlayment through the screw fixing section.
By providing a water-above water-stopping section for each first fastening hole and providing water-draining sections separated from the upper surface of the roofing on both sides of the water-above water-stopping section, rainwater that is blown onto the roofing does not stagnate in the water-above water-stopping section, but can be smoothly drained out toward the eaves from the water-draining sections separated from the upper surface of the roofing.
When the plate-shaped roofing material of the present invention is installed, the head side of the upper plate-shaped roofing material is overlapped on the tail side of the lower plate-shaped roofing material in the flow direction, so that the upper surface of the roofing and the lower surface of the plate-shaped roofing material are separated by the thickness of the plate-shaped roofing material as they approach the eaves, allowing rainwater flowing through the drainage holes to flow smoothly to the eaves.
When combined with a configuration having multiple drain holes that are spaced apart by the thickness of the plate roofing material as one moves toward the eaves, the drain holes become air passages, causing the air on the top surface of the roofing to move in both directions, not just the rafters but also the flow direction, promoting ventilation of the entire roof surface in the space under the plate roofing material.
By promoting ventilation across the entire roof surface, rainwater that has seeped onto the roofing and condensation caused by radiation cooling in winter are dried out, preventing corrosion of the roof base and increasing the durability of the entire roof.
Furthermore, due to the above-mentioned effect, the plate-shaped roofing material of the present invention is able to solve waterproofing issues even when screws are used, making it possible to lay the plate-shaped roofing material directly on top of roofing installed on a roof base and fix it to the roof base with screws, thereby enabling the roofing material to be easily removed without damage.
This configuration allows the roofing material to be easily removed without labor, making it possible to reuse the roofing material at low cost, and it has become possible to repeatedly reuse the sheet roofing material of the present invention without discarding it even in cases such as rebuilding or replacing roofing materials, which previously required re-roofing.
Furthermore, in the plate-shaped roofing material of the present invention, the working width dimension of the plate-shaped roofing material is half the design unit dimension of the building, the horizontal projection dimension of the working length of the plate-shaped roofing material is half the working width dimension, and the working length dimension is the horizontal projection dimension of the working length multiplied by the gradient elongation rate for each slope of the roof, and when the plate-shaped roofing material is laid, the head side of the plate-shaped roofing material of the upper stage is placed on the tail side of the plate-shaped roofing material of the lower stage in the flow direction, and the sides of the adjacent plate-shaped roofing materials are placed in contact with each other in the girder direction, and the working width dimension is shifted by half for each stage in the flow direction, so that standardized-shaped roofing materials of standardized shapes can be placed on all roof ends such as the land ridge, corner ridge, eaves, three-way, hipped ridge difference, and valley. Since standardized-shaped roofing materials of standardized shapes are placed on all roof ends, there is no need to record which roofing materials were placed on which roof ends.
Furthermore, by using screws as fastening materials for the standardized roofing material laid on the roof edge, the plate-shaped roofing material on the roof edge can be easily removed, allowing it to be reused easily.
As a result, reusing the sheet-shaped roofing material of the present invention when re-roofing is less costly than discarding the existing roofing material and installing a new roofing material, and there are many benefits to reusing the material.
When using this invention, if the roofing material is made of extremely durable ceramic, it can be used repeatedly for 200 or 300 years, which will contribute greatly to common human challenges such as reducing greenhouse gas emissions, minimizing resource consumption, and protecting the environment by reducing waste, and will help realize a transition to a "circular economy" for roofing materials.

Product drawing of sheet roofing material according to an embodiment of the present invention FIG. 2 is a cross-sectional view of a product diagram of a sheet-shaped roofing material according to an embodiment of the present invention. Roof covering diagram of sheet-shaped roofing material and standardized shape roofing material according to the embodiment of the present invention Cross-sectional view of a plate-shaped roofing material according to an embodiment of the present invention FIG. 1 is an enlarged cross-sectional view of a plate-shaped roofing material according to an embodiment of the present invention; Roof covering diagram of sheet-shaped roofing material and standardized shape roofing material according to the embodiment of the present invention Product drawing of a standardized corner roof material according to an embodiment of the present invention

In the first embodiment of the present invention, a roof structure using plate-shaped roofing materials is provided with a roofing sheet on a roof foundation of a building roof having a slope, and a plate-shaped roofing material is directly laid on the roofing sheet, and a fastening material is fixed to the roof foundation using screws. In the roof structure using plate-shaped roofing materials, a plurality of first fastening holes are provided on the tail side of the plate-shaped roofing material, and a water-stopping portion is provided on the underside of the plate-shaped roofing material on the tail side of the first fastening holes for each of the first fastening holes, and drainage portions are provided on both ends of the water-stopping portion, the working width dimension of the plate-shaped roofing material is half the design unit dimension of the building, the horizontal projection dimension of the working length of the plate-shaped roofing material is half the working width dimension, and the working length dimension is gradient to the horizontal projection dimension of the working length for each slope of the roof. The dimensions are multiplied by the elongation rate, and when the plate-shaped roofing material is laid, the head side of the upper plate-shaped roofing material is placed on the tail side of the lower plate-shaped roofing material in the flow direction, and the sides of the adjacent plate-shaped roofing materials are placed in contact with each other in the girder direction, with each stage in the flow direction being shifted by half the working width dimension, the water-stopping portion is in contact with the upper surface of the roofing, the water drainage portion is separated from the upper surface of the roofing, and standardized-shaped roofing materials of a standardized shape are placed at all roof edges such as the ridge portion, corner ridge portion, eaves portion, three-pronged portion, hipped ridge difference portion and valley portion, and the standardized-shaped roofing material has a second fastening hole, and the fastening material of the standardized-shaped roofing material is fixed to the roof base using the screws.
According to this embodiment, the plate-shaped roofing material of the present invention can improve the waterproofing performance against rainwater blown in by wind and rain.
In the present invention, primary waterproofing is performed using a plate-shaped roofing material, and secondary waterproofing is performed using roofing.
During a storm, the first waterproofing alone is not enough to completely prevent rainwater from entering, so if rainwater blows into the roofing material deep inside the roofing material, it is necessary for the waterproofing performance to be able to smoothly drain the rainwater on the roofing material out to the eaves side without allowing it to seep into the roof underlayment through holes in the fastening material.
The plate-shaped roofing material of the present invention has a plurality of first fastening holes at the tail end, and a water-blocking portion above water is provided at the tail end of the underside of each of the first fastening holes.
By using screws as fastening materials, the water-stopping part of the plate-shaped roofing material is firmly adhered to the top surface of the roofing when the plate-shaped roofing material is fixed to the roof base, and rainwater that blows onto the roofing on the back side of the roofing material is completely stopped by the water-stopping part.
Rainwater will no longer penetrate the screws that secure the plate-shaped roofing material on the below-water side of the water-stopping section, and as a result, rainwater will no longer penetrate into the interior of the roof underlayment through the screw fixing section.
By providing a water-above water-stopping section for each first fastening hole and providing water-draining sections separated from the upper surface of the roofing on both sides of the water-above water-stopping section, rainwater that is blown onto the roofing does not stagnate in the water-above water-stopping section, but can be smoothly drained out toward the eaves from the water-draining sections separated from the upper surface of the roofing.
In addition, when laying the plate-shaped roofing material of the present invention, the head side of the upper plate-shaped roofing material is overlapped on the tail side of the lower plate-shaped roofing material in the flow direction, so that the upper surface of the roofing and the lower surface of the plate-shaped roofing material are separated by the thickness of the plate-shaped roofing material as they approach the eaves, allowing rainwater flowing through the drainage holes to flow smoothly down to the eaves.
When combined with a configuration having multiple drain holes that are spaced apart by the thickness of the plate roofing material as one moves toward the eaves, the drain holes become air passages, causing the air on the top surface of the roofing to move in both directions, not just the rafters but also the flow direction, promoting ventilation of the entire roof surface in the space under the plate roofing material.
By promoting ventilation across the entire roof surface, rainwater that has seeped onto the roofing and condensation caused by radiation cooling in winter are dried out, preventing corrosion of the roof base and increasing the durability of the entire roof.
Due to the above-mentioned effect, the roof structure using the plate-shaped roofing material of the present invention is able to solve the problem of waterproofing even when screws are used, making it possible to realize a configuration in which the plate-shaped roofing material is laid directly on top of the roofing installed on the roof base and fixed to the roof base with screws, thereby making it possible to easily remove the roofing material without damage.
This configuration allows the roofing material to be easily removed without labor, making it possible to reuse the roofing material at low cost, and it has become possible to repeatedly reuse the sheet roofing material of the present invention without discarding it even in cases such as rebuilding or replacing roofing materials, which previously required re-roofing.
Furthermore, in the roof structure of the plate-shaped roofing material of the present invention, the working width dimension of the plate-shaped roofing material is half the design unit dimension of the building, the horizontal projection dimension of the working length of the plate-shaped roofing material is half the working width dimension, and the working length dimension is the horizontal projection dimension of the working length multiplied by the gradient elongation rate for each slope of the roof, and when the plate-shaped roofing material is laid, the head side of the upper plate-shaped roofing material is placed on the tail side of the lower plate-shaped roofing material in the flow direction, and the sides of the adjacent plate-shaped roofing materials are placed in contact with each other in the girder direction, and by shifting the working width dimension by half for each step in the flow direction, standardized shape roofing materials can be placed at all roof ends such as the land ridge, corner ridge, eaves, trifurcated portion, hipped ridge difference portion, and valley portion.
Since standardized-shape roofing materials of standardized shapes are placed on all roof edges, there is no need to record which roofing materials were placed on which roof edges.
Furthermore, by using screws as fastening materials for the standardized roofing material laid on the roof edge, the plate-shaped roofing material on the roof edge can be easily removed, allowing it to be reused easily.
As a result, when re-roofing, using the roof structure of the sheet roofing material of the present invention to reuse the sheet roofing material and standardized shape roofing material is less costly than discarding the current roofing material and using new roofing material, resulting in many benefits of the present invention.

A second embodiment of the present invention is a roof structure using plate-shaped roofing materials according to the first embodiment, in which the plate-shaped roofing materials and the standardized shape plate-shaped roofing materials are made of ceramics.
According to this embodiment, if the roofing material is made of extremely durable ceramics, it can be used repeatedly for 200 or 300 years. This will make a great contribution to solving common challenges faced by all of humanity, such as reducing greenhouse gas emissions, minimizing resource consumption, and protecting the environment by reducing waste, and will help realize a transition to a "circular economy" for roofing materials.
In addition, ceramic roofing materials do not fade due to ultraviolet degradation, so there are no maintenance costs associated with repainting the roofing material.
Ceramic roofing materials require maintenance costs such as re-roofing due to deterioration of the underlayment, but by using this embodiment, it is possible to reuse not only plate-shaped roofing materials but also standardized shaped roofing materials with extremely high workability, eliminating the need to purchase new roofing materials and significantly reducing the costs involved in re-roofing.

The third embodiment of the present invention is such that, in a roof structure using a plate-shaped roofing material according to the first embodiment, the water drainage portion is provided on both sides of the first fastening hole on the underside at a position spaced apart from the first fastening hole for each first fastening hole.
According to this embodiment, rainwater that has been stopped by the above-water water-stopping section can be more smoothly circularly discharged from the drainage section toward the eaves side.

Hereinafter, a roof structure using a sheet-shaped roofing material 1 according to an embodiment of the present invention will be described.
FIG. 1 is a product drawing of a sheet-shaped roofing material 1 according to an embodiment of the present invention.
FIG. 1 is a product drawing of a sheet-shaped roofing material 1, which is a six-sided view according to a projection method.
The left side view is omitted because it appears symmetrically with the right side view.
The plan view of FIG. 1 shows the top surface 9 of the product, and is used as a plan view when laying the sheet roofing material 1 on a roof 2.
The girder direction 3 is the left-right direction at the drawing position, and the flow direction 4 is the up-down direction at the drawing position, with the lower side at the drawing position being the head side 6 of the plate-shaped roof material 1 and the upper side being the tail side 5.
In the plate-shaped roofing material 1 of the embodiment, the working width dimension W is 455 mm, which corresponds to 0.5P of the shaku module in terms of the design unit dimension P of the building.
The plate-shaped roofing material 1 of the embodiment is made of a highly durable ceramic material and has a shape that is easy to mold with a mold.
The overall length dimension LA is 300 mm, and the dimensional ratio to the working width dimension W is as follows:
Overall length dimension LA: Working width dimension W = 1: approx. 1.5
The working length L is set differently depending on the slope elongation rate for each slope 26 of the roof 2.
In the embodiment, the horizontal projection dimension Lh of the working length is set to 227.5 mm, which is 1/4 of the design unit dimension P of the building, and the working length L is calculated by multiplying the horizontal projection dimension Lh of the working length by the gradient elongation rate. The plan drawing shows the working length L for each of the 3-inch gradient, 4-inch gradient, and 5-inch gradient.
The tail side drain and the first fastening hole 11 are provided on the tail side 5 from the working length L.
The first fastening holes 11 are four in number and are provided symmetrically on the left and right.
In addition, the plan view shows the first fastening hole 11 as well as the fastening hole upper surface side 11U.
In the right side view, the side end portion 7 and the tail side 5 of the underside 8 are shown with a tail vertical surface 17 and a roofing contact surface 18 .
In this embodiment, the thickness T of the plate-shaped roofing material 1 is 8.5 mm.
The lower surface 8 is provided with a concave surface 10, the depth D of which is 1 mm.
The bottom view shows the underside 8 of the sheet roofing material 1 .
A plurality of rectangular concave surfaces 10 are provided at regular intervals on the lower surface 8 of the plate-shaped roofing material 1, forming a lattice pattern.
The plate-shaped roofing material 1 of the present invention has a lattice-like structure with multiple rectangular concave surfaces 10 spaced at regular intervals on the underside 8, which makes it possible to reduce the weight of the roofing material while maintaining the bending fracture load required for a roofing material.
By forming a lattice pattern with multiple rectangular concave surfaces 10 spaced at regular intervals on the underside 8, the spatial volume between the underside 8 of the plate-shaped roofing material 1 and the upper surface of the roofing 25 is increased, improving the insulating performance from the plate-shaped roofing material 1 to the roof underlay 24.
A plurality of first fastening holes 11 are provided at the tail end 5 of the plate-like roofing material 1, and a water-resistant water stopper 12 is provided at the underside 8 for each of the first fastening holes 11, closer to the tail end 5 than the first fastening holes 11.
In the embodiment, a water-surface water-stopping portion 12 is provided at the tail side 5 of each of the four first fastening holes 11, and a water draining portion 13 with a concave surface 10 is provided at both ends of the water-surface water-stopping portion 12 for each first fastening hole 11.
The water draining portions 13 are provided for each of the first fastening holes 11 at positions spaced apart on both sides of the first fastening hole 11 .
By providing concave surfaces 10 on both ends of the water-stopping portion 12, the water drainage portion 13 is separated from the upper surface of the roofing 25 during installation, and rainwater that has infiltrated onto the roofing 25 is drained to the eaves side 27 without stagnating.
The shorter the length of the water-stopping portion 12, the less rainwater will stagnate, but if the distance from the first fastening hole 11 is too short, there is a risk that rainwater will spread over the roofing 25 toward the first fastening hole 11 as it flows toward the eaves side 27.
The distance between the first fastening hole 11 and the drain hole 13 is preferably in the range of 5 mm to 60 mm.
In other words, it is desirable for the above-water water-stopping portion 12, which is located on the tail side 5 of the first fastening hole 11, to overlap the first fastening hole within a range of 5 mm to 60 mm on one side of the girder direction 3, and in terms of the length of the above-water water-stopping portion 12, a length range of 10 mm to 120 mm is desirable.
The length dimensions in the girder direction 3 of the above-water water-stopping portion 12 in the embodiment are 46 mm and 32 mm.
Water drainage holes 13 are provided on both sides of the four first fastening holes 11, but three of the water drainage holes 13 are shared with the adjacent first fastening holes 11, so five water drainage holes 13 are provided for the four first fastening holes 11.
The periphery of the first fastening hole 11 on the underside 8 of the plate-shaped roofing material 1 is a rectangular plane that is continuous with the above-water water-stopping portion 12 .
Since the surrounding surface of the first fastening hole 11 on the underside 8 of the plate-shaped roofing material 1 and the above-water water-stopping portion 12 are continuous rectangular planes, the roofing material 25 is tightly attached to the upper surface of the roofing 25 up to the surrounding surface of the first fastening hole 11, improving the water-stopping performance.
In addition, since the thickness of the base material around the first fastening hole 11 is large, high wind resistance can be achieved even when a load caused by strong winds is applied.
The above-water water-stopping portion 12 has a flat portion 15 parallel to the upper surface 9 of the plate-shaped roofing material 1, and the above-water water-stopping portion 12 has a roofing contact surface 18 extending from the tail side end 16 of the flat portion 15 of the above-water water-stopping portion 12 toward the lower end of the tail vertical surface 17.
In this embodiment, the tail end portion 16 of the flat portion 15 becomes the above-water water-stopping portion 12, which contacts the upper surface of the roofing 25 and the roofing contact surface 18 in a plane such that the entire roofing contact surface 18 functions as the above-water water-stopping portion 12.
Four fastening material storage spaces 14 are provided on the head side 6 of the underside 8 of the sheet roofing material 1, each having a rectangular concave surface 10. The fastening material storage spaces 14 correspond to the first fastening holes 11, and since there are four first fastening holes 11 in this embodiment, four fastening material storage spaces are also provided.
In this embodiment, the fastening material storage space 14 is elongated vertically in the girder direction 3, but this is because the overlap dimension changes depending on the gradient elongation rate for each gradient 26, so that the fastening material 19 can be stored in the fastening material storage space 14 even if the positional relationship between the fastening material 19 and the fastening material storage space 14 changes.
FIG. 1 shows the cross-sectional position of the cross-sectional view shown in FIG.

FIG. 2 is a cross-sectional view of a product drawing of a sheet-shaped roofing material 1 according to an embodiment of the present invention.
FIG. 2A is a cross-sectional view taken along line AA of the plan view of FIG.
A concave surface 10 having a concave depth D of 1 mm is formed on the lower surface 8 of the plate-shaped roofing material 1 in the flow direction 4 .
The enlarged view of FIG. 2( a ) shows the configuration of the periphery of the first fastening hole 11 and the above-water water-stopping portion 12 .
The water-above water-stopping portion 12 on the underside 8 of the plate-shaped roofing material 1 has a flat portion 15 parallel to the upper surface 9 of the plate-shaped roofing material 1, and the water-above water-stopping portion 12 has a roofing contact surface 18 extending from the tail side end 16 of the flat portion 15 of the water-above water-stopping portion 12 toward the lower end of the tail vertical surface 17.
The periphery of the underside 8 of the first fastening hole 11 is a flat surface that is continuous with the above-water water-stopping portion 12 .
The fastening hole upper surface side 11U has a conical shape, and in a cross-sectional view has a tapered shape that widens toward the upper surface 9.
FIG. 2B is a cross-sectional view taken along line BB of the plan view of FIG.
At the head side 6 of the underside 8 of the plate-shaped roofing material 1, there is a fastening material storage space 14 having a concave depth D of 1 mm.
The enlarged view of FIG. 2( b ) shows the configuration of the water draining portion 13 .
Since concave surfaces 10 are provided on both sides of the above-water water-stopping portion 12 and the concave surfaces 10 serve as water-draining water-stopping portions 13, when the plate-shaped roofing material 1 is laid, the water-draining portions 13 are spaced a distance approximating the concave depth D from the upper surface of the roofing 25, so that rainwater that has seeped onto the roofing 25 can be drained to the eaves side 27 without seeping into the fastening holes fastened to the roof underlayment 24 by fastening material 19.
FIG. 2C is a cross-sectional view taken along line CC shown in the bottom view of FIG.
A concave surface 10 having a concave depth D of 1 mm is formed on the lower surface 8 of the plate-shaped roofing material 1 in the girder direction 3 .

FIG. 3 is a roof plan view of the sheet-shaped roofing material 1 and the standardized shape roofing material 29 according to the embodiment.
The plan view of this embodiment is a roof plan view of one roof surface of a gable roof or a single-shed roof, and shows that a plate-shaped roof material 1 and a standardized shaped roof material 29 are laid on the flat portion and the eaves portion 35 of the roof edge 28.
The working width dimension W of the plate-shaped roofing material 1 of the embodiment is half the design unit dimension P of the building, and since the design unit dimension P of the building is 910 mm in shaku modules, the working width dimension W is 455 mm, which is half of 910 mm.
The horizontal projection dimension Lh of the working length of the plate-shaped roofing material 1 is half the working width dimension W, and in this embodiment is 227.5 mm.
The working length dimension L is the horizontal projection dimension Lh of the working length multiplied by the gradient elongation rate for each gradient 26 of the roof 2.
The horizontal projection dimension Lh of the working length is half the working width dimension W and is 227.5 mm which is one-fourth of the design unit dimension P. The horizontal projection dimension Lh of the working length is constant, but the working length L changes for each gradient 26 because the gradient elongation rate differs for each gradient 26.
Since the slope 26 of the roof 2 is a 5 inch slope, the slope extension rate is 1.118.
Therefore, the working length L of the plate-shaped roofing material 1 in this figure is 254.4 mm, which is the horizontal projection dimension Lh of the working length of 227.5 mm multiplied by the gradient elongation rate of 1.118.
Since the total length dimension LA of the plate-shaped roofing material 1 is 300 mm, the overlap dimension of the roofing materials is 45.6 mm.
Laying begins from the eaves side 27. The laying procedure will be described assuming that the first stage of the eaves side 27 begins from the eaves section 35 on the left side in the girder direction 3.
To begin laying the first tier, a sheet roofing material 1 is placed on the eaves 35 of the roof end 28, and adjacent sheet roofing materials 1 are placed continuously to the right side so that the sides 7 of the adjacent sheet roofing materials 1 abut against each other.
When the entire first layer has been laid, the head side 6 of the second layer of sheet roofing material 1 is placed on the tail side 5 of the first layer of sheet roofing material 1.
In the flow direction 4, the tail end 5 of the lower level plate-shaped roofing material 1 is overlapped with the head end 6 of the upper level plate-shaped roofing material 1, and this is repeated up to the ridge section 33, but in Figure 3 the arrangement is stopped halfway in order to show the construction procedure.
In the girder direction, each stage is shifted by 227.5 mm, which is half the working width dimension W.
Since a plate-shaped roofing material 1 is arranged on the eaves portion 35 of the first stage, a half tile 48 of a standardized shape roofing material 29 having a working width dimension half the working width dimension W of the plate-shaped roofing material 1 is arranged on the eaves portion 35 of the second stage.
By arranging the half roof tiles 48 in the second row at the eaves portion 35, the second row of plate-like roofing materials 1 are shifted by 227.5 mm, which is half the working width dimension W, compared to the first row.
At the eaves 35 of the roof end 28, the plate-shaped roofing material 1 and the half roof tiles 48 which are standardized shaped roofing materials 29 having a standardized shape are arranged alternately in rows.
The half tile 48, which is the standardized shape roof material 29, has a second fastening hole 30, and the fastening material 19 is fixed to the roof base 24 using a screw 19B.
The arrangement relationship between the plate-shaped roofing materials 1 and the standardized shape roofing materials 29 in the first and second rows is repeated in the third and fourth rows, and the same arrangement relationship is repeated thereafter.
The plate-shaped roofing material 1 of this embodiment is made of highly durable ceramic material.
The ceramic material is a material that is not deteriorated by ultraviolet rays and has a durability of 200 to 300 years, and by using screws 19B as fastening materials 19, the plate-shaped roofing material 1 and the standardized shaped roofing material 29 can be easily removed from the roof 2 without damaging them.
The method of mounting the plate-shaped roofing material 1 is to fix the joint plate 23 and the plate-shaped roofing material 1 together to the roof underlayment 24 with fastening material 19 using the inner two first fastening holes 11 out of the four first fastening holes 11 provided in the roofing material overlapping portion at the tail side 5 of the upper surface 9.
By matching the center line of the joint plate 23 with the side end portion 7 of the plate-like roofing material 1, staggered roofing can be easily performed with a shift of half the working width dimension W.
The fastening material 19 uses screws 19B which have a high fixing strength to the roof base 24 and are easy to remove.
The fastening procedure is as follows: first, of the four first fastening holes 11 in the plate-shaped roofing material 1, the two outer first fastening holes 11 are used to fasten the plate-shaped roofing material 1 to the roof underlayment 24.
Thereafter, the joint plate 23 and the plate-shaped roofing material 1 are fixed together to the roof base 24 with fastening material 19 using the two inner first fastening holes 11.
Since the plate-like roofing material 1 and the standardized shape roofing material 29 are fixed to the roof base 25 using screws 19B, they can be removed without damage, and by reusing them, the product can be used repeatedly without being discarded.

FIG. 4 is a cross-sectional view showing the installation of the sheet roofing material 1 according to the embodiment.
FIG. 4( a ) is a cross-sectional view taken along line DD of the roof plan of FIG. 3 , and is a cross-sectional view taken along the flow direction 4 .
The slope 26 of the roof 2 is a 5 inch slope, and the slope extension rate is 1.118.
The structure is such that roofing 25 is constructed on a roof base 24, and the plate-shaped roofing material 1 is laid directly on the roofing 25 and fixed to the roof base 24 with fastening material 19.
The fastening material 19 is made of screws 19B.
By using screws 19B as the fastening material 19, the fixing strength to the roof underlay 24 is increased, thereby not only achieving the basic performance of being able to fix the plate-shaped roofing material 1 without it being blown away even in strong winds such as a large typhoon, but also improving the water-stopping performance from the top surface 9 of the plate-shaped roofing material 1 by closely adhering the conical upper surface 9 of the fastening hole upper side 11U or the top surface 9 of the plate-shaped roofing material 1 to the underside 8 of the screw head 20H.
Furthermore, by fixing with screws 19B, the water-stopping portion 12 of the plate-shaped roofing material 1 and the upper surface of the roofing 25 are brought into complete contact with each other, thereby improving the water-stopping performance from the underside 8 of the plate-shaped roofing material 1.
The horizontal projection dimension Lh of the working length is 227.5 mm, which is 1/4 of the design unit dimension, and the working length L is 254.4 mm, which is calculated by multiplying the horizontal projection dimension Lh of the working length, 227.5 mm, by the gradient elongation rate of 1.118.
In the flow direction 4, the head side 6 of the upper sheet-like roofing material 1 is placed overlapping the tail side 5 of the lower sheet-like roofing material 1.
The above-water water-stopping portion 12 is in contact with the upper surface of the roofing 25 , and the water drainage portion 13 is spaced apart from the upper surface of the roofing 25 .
In this embodiment, the staggered roofing is offset by half the working width dimension W, so each step is fastened with a screw 19B. The placement of the water-resistant portion 12 above the water and the drainage portion 13 spaced apart from the roofing 25 is alternated.
In the present invention, the plate-shaped roofing material 1 provides primary waterproofing, and the roofing 25 provides secondary waterproofing.
In a storm or the like, the primary waterproofing alone is not enough to completely prevent rainwater from entering, so when rainwater blows into the roofing 25 at the back of the roof material, the waterproofing performance needs to be such that the rainwater on the roofing 25 can be smoothly drained out to the eaves side 27 through holes opened in the roof underlayment 24 with the fastening material 19 without entering the inside of the roof underlayment 24.
The plate-shaped roofing material 1 has a water-stopping portion 12 on the underside 8 of the tail end 5 for a plurality of first fastening holes 11 provided at the tail end 5.
When the plate-shaped roof material 1 is laid, this above-water water-stopping portion 12 comes into contact with the upper surface of the roofing 25, thereby preventing rainwater from penetrating below the water.
When the plate-like roof material 1 is fixed to the roof underlayment 24 with a fastening material 19, the contact surface between the water-above water stop part 12 and the upper surface of the roofing 25 is brought into close contact, and rainwater blown up to the roofing 25 on the lower surface 8 side of the roof material is completely stopped by the water-above water stop part 12.
Rainwater does not infiltrate into the first fastening hole 11 on the underwater side of the above-water water stop part 12, and as a result, rainwater does not infiltrate into the roof underlay 24 through a hole opened in the roof underlay 24 by the fastening material 19.
The inclination angle of the roofing contact surface 18 in this embodiment is the angle of the return gradient caused by the thickness T of the plate-shaped roofing material 1 of 8.5 mm when the plate-shaped roofing material 1 is laid with a working length L of 254.4 mm.
Thickness T 8.5 mm ÷ working length L 254.4 mm = 0.0334, and by calculating the arc tangent of this 0.0334, the return gradient angle can be calculated.
In this embodiment, the return gradient is 1.9 degrees, so by setting the inclination angle of the roofing contact surface 18 at 1.9 degrees, the upper surface of the roofing 25 and the roofing contact surface 18 come into contact with each other.
FIG. 4(b) is a cross-sectional view at the E-E cross section shown in the construction cross-sectional view of FIG. 4(a), and is a cross-sectional view in the girder direction 3.
There is an above-water water stop portion 12 on the above-water side of the fastening material 19, and water drainage portions 13 of the concave surface 10 are provided on both ends of the above-water water stop portion 12.
The above-water water-stopping portion 12 is grounded on the roofing 25 to stop rainwater that has infiltrated onto the roofing 25, and is structured so that the rainwater flows toward the eaves side via the drainage portions 13 provided on both ends of the above-water water-stopping portion 12.
Rainwater that is blown up onto the roofing 25 is temporarily retained by being stopped by the above-water water stop section 12, but since the drainage sections 13 with concave surfaces 10 provided on both ends of the above-water water stop section 12 are separated from the upper surface of the roofing 25, the rainwater retained in the above-water water stop section 12 can be drained out to the eaves side 27.
FIG. 4C is an enlarged view of the water draining portion 13 in FIG.
Since the drainage section 13 is separated from above the roofing 25, the blown-in rainwater is drained to the eaves side 27 by the drainage section 13.
As a result, rainwater is prevented from penetrating into the roof foundation 24 through holes opened in the roof foundation 24 by the fastening material 19.
The plate-shaped roofing material 1 of the present invention is configured such that, when laid, the head side 6 of the upper plate-shaped roofing material 1 is overlapped on the tail side 5 of the lower plate-shaped roofing material 1 in the flow direction 4, so that the upper surface of the roofing 25 and the underside 8 of the plate-shaped roofing material 1 are separated by the thickness T of the plate-shaped roofing material 1 as they approach the eaves side 27, allowing rainwater flowing from the drainage section 13 to flow smoothly to the eaves side 27.

FIG. 5 is an enlarged view of the fixing portion of the screw 19B in FIG. 4(a) in a cross-sectional view of the plate-shaped roofing material according to the embodiment.
FIG. 5A is an enlarged view of a portion fixed by a screw 19B in a DD cross section, in which the screw 19B has a flat upper surface at its head 20H.
The screw 19B has a joint 22 between the screw head 20H and the shaft 21 that is cone-shaped.
In this embodiment, since it is desired to minimize the protrusion of the screw head 20H from the upper surface 9 of the plate-shaped roofing material 1, the upper surface shape of the screw head 20H is made into a flat shape of the screw 19B.
The upper surface 11U of the first fastening hole 11 is also cone-shaped like the screw 19B.
In the case of a screw 19B having a flat-shaped upper surface 9 of the screw head 20H, the joint 22 between the screw head 20H and the shank 21 is made conical in shape to increase the shear strength of the screw head 20H and the shank 21, and the upper side 11U of the fastening hole is also made conical in shape to prevent interference between the conical portion of the screw 19B and the first fastening hole 11, thereby minimizing the projection dimension of the screw head 20H from the upper surface 9 of the plate-shaped roofing material 1.
When laying and fixing the plate-shaped roofing material 1, it is fastened to the roof underlayment 24 with the screw 19B, so that the upper surface of the cone shape of the fastening hole upper side 11U and the lower surface of the screw head 20H of the screw 19B are in tight contact with each other.
Furthermore, by fixing it to the roof base 24 with screws 19B, the water-stopping part 12 and the upper surface of the roofing 25 are tightly attached to each other.
As a result, rainwater that has infiltrated into the overlapping portion of the plate-shaped roofing material 1 and that has crossed the overlapping portion and infiltrated onto the roofing 25 can be stopped.
A fastening material storage space 14 is provided on the concave surface 10 at the head side 6 of the underside 8 of the plate-shaped roofing material 1.
When laid, the concave depth D of the fastening material storage space 14 of the upper plate-like roofing material 1 is deeper than the height of the screw head 20H of the screw 19B fastening the lower plate-like roofing material 1, so that the screw head 20H fits within the fastening material storage space 14 without interfering with the lower surface 8 of the plate-like roofing material 1.
According to this embodiment, the fastening material 19 that fastens the plate-like roofing material 1 is positioned at a position higher than the upper surface 9 of the plate-like roofing material 1 by the height of the fastening material head 20 of the fastening material 19, but the fastening material storage space 14, which has a concave surface 10 deeper than the height of the fastening material head 20 of the fastening material 19, stores the fastening material head 20 of the fastening material 19, so that it is possible to prevent the underside of the plate-like roofing material 1 and the fastening material head 20 of the fastening material 19 from interfering with each other, causing the head side 6 of the plate-like roofing material 1 to float and creating a gap.
As a result, the upper and lower plate-like roofing materials 1 are laid without any gaps, so that high waterproof performance can be achieved against wind and rain.
In addition, if the fastening material head 20 of the fastening material 19 interferes with the underside 8 of the plate-shaped roofing material 1, when the installer stands on the plate-shaped roofing material 1, the installer's weight will be applied to the plate-shaped roofing material 1 as a point load, causing problems such as cracks. However, by providing a fastening material storage space 14, the underside 8 of the head side 6 of the plate-shaped roofing material 1 and the upper surface 9 of the tail side 5 of the plate-shaped roofing material 1 receive the load as a surface, thereby achieving high load-bearing performance.
The water-stopping portion 12 provided on the underside 8 of the plate-shaped roofing material 1 has a flat portion 15 parallel to the upper surface 9 of the plate-shaped roofing material 1, and a roofing contact surface 18 is provided from the tail side end 16 of the flat portion 15 of the water-stopping portion 12 toward the lower end of the tail vertical surface 17.
Of the above-water water-stopping portion 12, the portions that perform the water-stopping function by coming into contact with the upper surface of the roofing 25 are the tail end portion 16 and the roofing contact surface 18.
According to this embodiment, the plate-shaped roofing material 1 of the present invention has the roofing contact surface 18 in contact with the upper surface of the roofing 25, thereby further improving the water-stopping performance of the above-water water-stopping portion 12.
Furthermore, when a contractor stands on the plate roofing material 1 or when a load is applied to the main body of the plate roofing material 1 from the upper surface 9 of the plate roofing material 1 due to snow accumulation or the like, the roofing contact surface 18 comes into contact with the upper surface of the roofing 25, thereby improving the strength of the plate roofing material 1.
FIG. 5B is an enlarged view of the portion fixed by the screw 19B in the DD cross section, in which the screw 19B is in a thin arc shape with a nearly flat upper surface of the screw head 20H.
Since it is desired to minimize the protrusion of the screw head 20H from the upper surface 9 of the plate-like roofing material 1, the screw 19B has a thin head whose upper surface shape is nearly flat.
The screw 19B has a joint 22 between the screw head 20H and the shaft 21 that is cone-shaped.
The upper surface 11U of the first fastening hole 11 is also cone-shaped like the screw 19B.
In the case of screws 19B having a thin head shape in which the upper surface 9 of the screw head 20H is nearly flat, the joint 22 between the screw head 20H and the shank 21 is made conical in shape to increase the shear strength of the screw head 20H and the shank 21, and the upper side 11U of the fastening hole is also made conical in shape so that the conical portion of the screw 19B does not interfere with the first fastening hole 11, thereby minimizing the projection dimension of the screw head 20H from the upper surface 9 of the plate-shaped roofing material 1.
When laying and fixing the plate-shaped roofing material 1, it is fastened to the roof underlayment 24 with a screw 19B, so that the upper surface 9 of the plate-shaped roofing material 1 and the underside of the screw head 20H of the screw 19B are in close contact with each other.
Furthermore, by fixing it to the roof base 24 with screws 19B, the water-stopping part 12 and the upper surface of the roofing 25 are tightly attached to each other.
As a result, rainwater that has infiltrated into the overlapping portion of the plate-shaped roofing material 1 and that has crossed the overlapping portion and infiltrated onto the roofing 25 can be stopped.
A fastening material storage space 14 is provided on the concave surface 10 at the head side 6 of the underside 8 of the plate-shaped roofing material 1.
When laid, the concave depth D of the fastening material storage space 14 of the upper plate-like roofing material 1 is deeper than the height of the screw head 20H of the screw 19B fastening the lower plate-like roofing material 1, so that the screw head 20H fits within the fastening material storage space 14 without interfering with the lower surface 8 of the plate-like roofing material 1.
The water-stopping portion 12 provided on the underside 8 of the plate-shaped roofing material 1 has a flat portion 15 parallel to the upper surface 9 of the plate-shaped roofing material 1, and a roofing contact surface 18 is provided from the tail side end 16 of the flat portion 15 of the water-stopping portion 12 toward the lower end of the tail vertical surface 17.
Of the above-water water-stopping portion 12, the portions that perform the water-stopping function by coming into contact with the upper surface of the roofing 25 are the tail end portion 16 and the roofing contact surface 18.

FIG. 6 is a roof plan view of the plate-shaped roofing material 1 and the standardized shape roofing material 29 according to the embodiment.
The roof shape is a mixed hip-gable roof, with a land ridge section 33, a corner ridge section 34, a eaves section 35, a trifurcation section 36, a hip ridge difference section 38, and a valley section 37 at the roof edge 28, and standardized shape roof materials 29 of a standardized shape are arranged at all of the roof edges 28.
The roof 2 is a staggered roof having five roof surfaces, and has an L-shaped roof shape in a horizontal projection view.
The design unit dimension P is a shaku module, and 1P is 910 mm.
The eaves overhang 31 is 455 mm and the gable overhang 32 is also 455 mm, which is 0.5P when expressed in design unit dimension P.
The working width dimension W of the plate-shaped roofing material 1 is 455 mm, and the horizontal projection dimension Lh of the working length is 227.5 mm, which, when expressed in terms of the design unit dimension P, are 0.5P and 0.25P.
The roof 2 has many roof edges 28, such as two land ridge portions 33, four corner ridge portions 34, left and right eaves portions 35, and one valley portion 37.
It also has a three-pronged portion 36 of the roof end 28 where the land ridge portion 33 and two corner ridge portions 34 intersect, and a hipped ridge portion 38 of the roof end 28 where the land ridge portion 33, the corner ridge portion 34 and a valley portion 37 intersect.
The ridge difference portion has standardized shape roofing material 29 of different shapes for a gable roof and a hip roof.
In this embodiment, the ridge difference portion is a hipped ridge difference portion 38 .
The standardized shape roof material 29 placed on the land ridge portion 33 is a land ridge standardized shape roof material 41, and has a shape in which the vertical overlap portion of the tail side 5 of the plate-shaped roof material 1 is cut off.
The same shape of standardized land-based roofing material 41 is used for all land-based sections 33.
The standardized shaped roof materials 29 to be placed at the corner ridge portions 34 are a right corner standardized shaped roof material 39 and a left corner standardized shaped roof material 40, and are shaped by cutting the plate-shaped roof material 1 to match the angles of the left and right corner ridge portions 34.
A right-corner standardized roof material 39 of the same shape is used for the right-side corner ridge portion 34, and a left-corner standardized roof material 40 of the same shape is used for the left-side corner ridge portion 34.
The standardized shape roofing material 29 placed on the eaves portion 35 is a half tile 48 formed by cutting the plate-shaped roofing material 1 in half.
In this embodiment, the plate-shaped roofing materials 1 are laid in a staggered pattern, so that in the eaves portion 35, plate-shaped roofing materials 1 and half roof tiles 48 are used alternately for each row as the standardized shape roofing material 29.
Half tiles 48 and plate-shaped roofing materials 1 of the same shape are used for all of the eaves portions 35.
The standardized shaped roof material 29 placed on the three-pronged portion 36 is a three-pronged standardized shaped roof material 42 used for triangular shaped roof surfaces and a right land corner standardized shaped roof material 46 and a left land corner standardized shaped roof material 47 used for roof surfaces having a land ridge portion 33.
The land corner right standardized shaped roof material 46 and the land corner left standardized shaped roof material 47 have a shape in which the vertical overlapping portions of the tail end 5 of the corner ridge right standardized shaped roof material 39 and the corner ridge left standardized shaped roof material 40 are cut.
The three-pronged standardized roof material 42 has an isosceles triangular shape formed by combining the diagonal cut portions of the land corner right standardized roof material 46 and the land corner left standardized roof material 47 .
For all three-pronged portions 36, the same three-pronged standardized roof material 42, the land corner right standardized roof material 46, and the land corner left standardized roof material 47 are used.
The standardized shaped roof materials 29 placed in the valley portion 37 are a valley right standardized shaped roof material 43 and a valley left standardized shaped roof material 44, and are shaped by cutting the plate-shaped roof material 1 on the left and right sides to match the angle of the valley portion 37.
When viewed from the eaves side, a valley-right standardized shaped roof material 43 is used on the side located to the left of the valley portion 37, and a valley-left standardized shaped roof material 44 is used on the side located to the right.
The same shaped valley right standardized shaped roof material 43 and valley left standardized shaped roof material 44 are used for all the valley portions 37.
In an embodiment in which the corner ridge portion 34 is located to the right when viewed from the eaves side, the standardized shape roof material 29 placed at the hipped ridge difference portion 38 is a right-side standardized shape roof material 45 .
The shape of the standardized hipped roof material 45 is obtained by cutting the plate roof material 1 to match the angle of the corner ridge portion 34, and the portion facing the land ridge portion 33 is formed by cutting the vertical overlap portion of the butt end 5 of the plate roof material 1.
The apparent portion looks similar to the plate-shaped roofing material 1 and the land-ridge standardized shape roofing material 41, but the actual shape of the portion facing the corner ridge portion 34 has a vertical overlap portion and is a different shape from the other standardized shape roofing materials 29.
As in the embodiment, the same shape of hipped ridge right standardized shape roof material 45 is used for all hipped ridge misalignment parts 38 that have a corner ridge part 34 on the right side.
By adopting the configuration of the present invention, standardized-shape roof materials 29 having a standardized shape are arranged on all roof edges 28 as in this embodiment.
As a result, there is no need to record which roof material was placed on which roof edge 28 as in the prior art.
In addition, by using screws 19B as the fastening material 19 for the standardized shaped roof material 29 laid on the roof end 28, the standardized shaped roof material 29 on the roof end 28 can be easily removed, and can be easily reused in the same way as the plate-shaped roof material 1.
As a result, when re-roofing, it is cheaper to reuse the plate-shaped roofing material 1 and the standardized shape roofing material 29 using the roof structure of the plate-shaped roofing material 1 of the present invention than to discard the existing roofing material and use a new roofing material, and the advantages of the present invention are numerous.
From a social perspective, the repeated use of roofing materials over a long period of time also contributes to protecting the global environment by conserving resources, reducing waste, and saving energy.

FIG. 7 is a product drawing of a right corner roof material 39 according to an embodiment.
The right corner ridge standardized shape roof material 39 is a standardized shape roof material 29 that is placed near the corner ridge when the corner ridge portion 34 is on the right side when viewed from the eaves side.
FIG. 7 is a product drawing of the right-corner standardized roof material 39, which is a projection drawing by a projection method, and is shown in three views, namely, a plan view, a front view, and a bottom view.
The plan view of Figure 7 shows the top surface 9 of the product, and is a plan view used when laying the right-corner standardized roofing material 39 on the roof 2.
The lower side of the drawing position is the head side 6 of the plate-shaped roofing material 1, and the upper side is the tail side 5.
In the example of the right corner roof material 39, the working width dimension W is 455 mm, which corresponds to 0.5P of the shaku module in terms of the design unit dimension P of the building.
The overall length dimension LA is 300 mm, the same as that of the plate-shaped roofing material 1.
Two second fastening holes 30 are provided on the rear end side 5.
The right side end 7 of the right corner ridge standardized shape roof material 39 is shaped to match the corner ridge angle of a 4-inch sloped hip roof.
The line connecting the intersection of the working length dimension L of 245 mm with a 4-inch slope and 227.5 mm, which is half the working width dimension W, and the right end of the head of the product forms the right line of the corner ridge right standardized shape roof material 39.
The right corner roof material 39 is assumed to be manufactured by cutting the sheet roof material 1.
The bottom view shows the underside 8 of the right corner roof material 39 .
As with the plate-shaped roofing material 1, the underside 8 is provided with a water-stopping portion 12 above water, a water drainage portion 13, a roofing contact surface 18, a recess 10, a fastening material storage space 14, and a second fastening hole 30.
As in this embodiment, the standardized shape roofing material 29 can be produced in advance by processing the plate-shaped roofing material 1 in a factory.
The standardized shape roof material 29 has a second fastening hole 30, and by fastening it to the roof base 24 with a screw 19B using the second fastening hole 30, it can exhibit a fixing strength that will not fly away even in a large typhoon.
In addition, the shape can be standardized at the roof end 28, and the standardized shape roof material 29 can be easily removed without being damaged by using screws 19B, making it easy to reuse.

In the present invention, the design unit dimension P of a building is a shaku module in the embodiment, but the design unit dimension P of a building can be either a meter module or an inch module.
The inclination angle of the roofing contact surface 18 in the present invention is set to a predetermined working length L, but is not limited to the set working length L, and functions effectively within a predetermined range.
In addition, in the embodiment, the standardized shaped roof material 29 has a shape in which the vertical overlapping portion is cut off to form the land-ridge standardized shaped roof material 41, but this shape is not limited to this, and it may also be, for example, a standardized shaped roof material 29 in which the land-ridge portion 33 has the shape of the plate-shaped roof material 1.

1 Plate-shaped roofing material 2 Roof 3 Girder direction 4 Flow direction 5 Bottom side 6 Head side 7 Side end 8 Underside 9 Top side 10 Concave surface 11 First fastening hole 11U Top side of first fastening hole 12 Water stopper part 13 Water drainage part 14 Fastening material storage space 15 Flat part 16 Bottom side end 17 Bottom vertical surface 18 Roofing contact surface 19 Fastening material 19B Screw 20 Fastening material head 20H Screw head 21 Shaft part 22 Joint part 23 Joint plate 24 Roof underlay 25 Roofing 26 Slope 27 Eaves side 28 Roof end 29 Standardized shape roofing material 30 Second fastening hole 31 Eaves overhang 32 Gable overhang 33 Land ridge part 34 Corner ridge part 35 Eaves part 36 Tri-forked part 37 Valley part 38 Hip ridge difference part 39 Standardized shaped roof material for right corner ridge 40 Standardized shaped roof material for left corner ridge 41 Standardized shaped roof material for land ridge 42 Standardized shaped roof material for three-pronged ridge 43 Standardized shaped roof material for right valley 44 Standardized shaped roof material for left valley 45 Standardized shaped roof material for right hipped ridge 46 Standardized shaped roof material for right land corner 47 Standardized shaped roof material for left land corner 48 Half tile Lh Horizontal projection dimension L of working length Working length dimension LA Total length dimension W Working width dimension T Thickness D Concave depth H Screw head height P Design unit dimension

Claims (3)

In a roof structure using said plate-shaped roofing material, a roofing sheet is provided on a roof base of a building having a slope, a plate-shaped roofing material is directly laid on said roofing sheet, and a fastening material is fixed to said roof base using a screw,
A plurality of first fastening holes are provided at the rear end of the plate-shaped roofing material,
a water stopper portion is provided on the underside of each of the first fastening holes on the rear side of the first fastening holes;
A water drain is provided at both ends of the water-surface water stop portion,
The working width dimension of the plate-shaped roofing material shall be half the design unit dimension of the building,
The horizontal projection dimension of the working length of the plate-shaped roofing material is half the working width dimension,
The working length dimension is the horizontal projection dimension of the working length multiplied by the slope extension rate for each slope of the roof,
When the plate-shaped roofing material is installed,
The head side of the upper sheet roofing material is arranged so as to overlap the tail side of the lower sheet roofing material in the flow direction;
In the girder direction, the side surfaces of the adjacent plate-shaped roofing materials are arranged to abut against each other,
The stages are arranged in the flow direction with a shift of half the working width dimension,
The water-stopping portion is in contact with the upper surface of the roofing,
The drainage portion is spaced from the upper surface of the roofing,
Standardized roofing materials are placed on all roof edges, including the ridge, corners, eaves, trifurcation, hipped ridge, and valleys.
The standardized roofing material has a second fastening hole,
A roof structure using plate-shaped roofing materials, characterized in that the fastening material of the standardized shape roofing material is fixed to the roof base using the screws.
2. The roof structure of claim 1, wherein said sheet roofing material and said standardized shape sheet roofing material are made of ceramic.
The roof structure of the plate-shaped roof material described in claim 1, characterized in that the water drainage portion is provided on both sides of the first fastening hole on the underside for each of the first fastening holes at a position spaced apart from the first fastening hole.

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