JP7354909B2 - Roof structure and roof structure construction method - Google Patents

Description

The present invention relates to a roof structure formed by roof panels forming a roof slope, and a construction method thereof.

Conventionally, when forming a sloping roof, roof panels have been used in which plate materials that serve as the base for the roof finishing material are fixed to rafters installed on a horizontal base material such as a main building (for example, Patent Document 1 and Patent Document 1) 2). These roof panels are delivered to the construction site with the rafters and the plates that are placed and fixed on top of them integrated in advance at the factory, so each component must be lifted to roof height and installed individually. There is no need to do this, and workability can be improved.

Japanese Patent Publication No. 10-46737 JP 7-286394

By the way, in a wooden roof structure, there are cases where the strength of the roof structure as a whole (horizontal strength) is ensured by combining the joint strength between the purlin material and the rafters, and the joint strength between the rafters and the shedding board. However, in the roof panels described in Patent Document 1 and Patent Document 2, adjacent roof panels are placed on a horizontal base material with their seams aligned both in the horizontal direction and in the roof slope direction, so the seams of the roof panels are The location is a weak point in the structure, and it is highly likely that the horizontal strength of the entire roof cannot be ensured without the installation of reinforcing materials such as horizontal braces. It is also possible to arrange the joints of the roof panels in a staggered arrangement, but this poses a problem in that the layout of the roof panels becomes complicated and the construction process is time-consuming.

On the other hand, when forming a long and large sloped roof such as a roof with large gaps between beams or a single-sided roof, wooden rafters that slope along the roof slope may be joined together, but the joints of the rafters are requires high-precision construction because it is impossible to form a smooth roof surface unless they are joined together with precision. However, it is very difficult to accurately connect long, slanted rafters to each other, and the accuracy of the work depends largely on the skill of the builder, so the quality of the work sometimes varies from construction site to construction site.

Therefore, the present invention was made in view of the above-mentioned problems, and provides a roof panel that can be easily constructed while maintaining the structural strength necessary for the roof, a structure using the roof panel, and a structure using the roof panel. The purpose is to provide a method.

A first roof structure of the present invention includes a plurality of horizontal base materials arranged parallel to each other at intervals and having a height difference forming a roof slope, and a plurality of horizontal base materials fixed on the horizontal base materials. and a plurality of roof panels laid side by side in the slope direction, the roof panels are fixed to a shedding board and a lower surface of the shedding board in parallel at intervals, and the roof panel is fixed to the lower surface of the shedding board at intervals, and Of the two roof panels adjacent in the slope direction, the rafter of one of the roof panels has a protruding part protruding from the edge of the shedding board, and A corbel is disposed between the rafters of the other roof panel and fixed to the shedding board of the other roof panel, and the protrusion length of the corbel is equal to the distance between the adjacent horizontal base materials. The roof panel is shorter than the above, and is characterized in that the projecting portion and the other roof panel are fixed to the same horizontal base material.

In the second roof structure of the present invention, the one roof panel is fixed to the horizontal base material with the protruding portion facing the water side, and the other roof panel is fixed to the horizontal base material with the protruding portion facing the water side. It is characterized in that it is arranged above the water side and fixed to the horizontal base material.

The third roof structure of the present invention is characterized in that the corrugated portion of the one roof panel and the rafters of the other roof panel are alternately arranged at equal intervals.

A fourth roof structure of the present invention is a roof structure in which three or more roof panels are arranged side by side in the slope direction, and each of the roof panels on the water side except for the roof panel closest to the ridge is above water. The roof panel is characterized in that it has the protruding part that protrudes to the side, and that the protruding part is arranged and fixed between the rafters of the roof panel adjacent to the water side.

A fifth roof structure of the present invention is a roof structure in which three or more of the roof panels are arranged side by side in the slope direction, and the roof panel on the water side has the protruding part projecting to the water side, and The roof panel on the underwater side has the corbel portion projecting above the water, and the above-water side and the below-water side ends of the rafters are arranged between the above-water side roof panel and the underwater side roof panel. The roof panel is characterized in that an intermediate roof panel whose portion does not protrude from the edge of the shedding board is arranged.

The roof structure construction method of the present invention is a roof structure construction method for constructing any one of the first to fifth roof structures, in which the one roof panel is fixed to the horizontal base material, and then the other roof panel is fixed to the horizontal base material. The other roof panel is arranged so that the shedding board of the roof panel covers the extending portion of the one roof panel, and the ends of the shedding boards of the one roof panel and the other roof panel are connected to each other. The one roof panel and the other roof panel are fixed by butting them together and driving a fixing tool into the raised portion from above the shedding board of the other roof panel.

According to the first roof structure of the present invention, one of the two roof panels adjacent to each other in the slope direction has a protruding portion in which the rafters protrude from the edge of the shedding board, and the protruding portion is placed between the rafters of the other roof panel and fixed to the sheathing board of the other roof panel, so that the rafters of one roof panel and the sheathing board of the other roof panel are joined. , the roof panels are joined together. By placing the protruding parts of the rafters that protrude from one roof panel between the rafters of the other roof panel, it is possible to close the spacing between the rafters at the joints between the roof panels. can. Therefore, there is no need to connect the ends of the rafters of each panel as in the past, and workability can be improved, and the structural strength borne by the rafters can be strengthened. Since the joints of the sheathing boards of each panel do not match the seams of the rafters, structural weaknesses can be compensated for, and by maintaining the joint strength between the rafters and sheathing boards, the roof structure can be improved. It is possible to secure the necessary horizontal strength as a whole. The protruding length of the corbel is shorter than the length of the adjacent horizontal base material, and since the corbel and the other roof panel are fixed to the same horizontal base material, the roof panels are joined together. It is possible to minimize the protruding length of the corrugated portion and facilitate the handling of the roof panel without reducing the strength.

According to the second roof structure of the present invention, one roof panel is fixed to the horizontal base material with the corrugated portion facing the water side, and the other roof panel is arranged on the water side of the one roof panel. During construction, one roof panel placed on the underwater side is first fixed onto the horizontal base material, and then the other roof panel on the water side is fixed to the horizontal base material. Since it is fixed on top of the timber, work can be done facing the water side, improving workability.

According to the third roof structure of the present invention, the corbels of one roof panel and the rafters of the other roof panel are alternately arranged at equal intervals, so that the bonding strength between the roof panels can be made uniform. can.

According to the fourth roof structure of the present invention, it is a roof structure in which three or more roof panels are arranged side by side in the slope direction, and the roof panels on the water side except for the roof panel closest to the ridge are arranged on the water side. In addition to having a protruding corbel, the corbel is placed and fixed between the rafters of the roof panels adjacent to the water side, so even if the roof grows larger, it can be accommodated by arranging multiple roof panels in the direction of the slope. be able to.

According to the fifth roof structure of the present invention, it is a roof structure in which three or more roof panels are arranged side by side in the slope direction, and the roof panel on the water side has a corbel that projects to the water side, and The side roof panel has a corbel that protrudes above the water side, and between the roof panel on the above water side and the roof panel on the below water side, the ends of the rafters on the water side and below the water side are the edge of the roof board. Since an intermediate roof panel is arranged that does not protrude from the roof, even if the roof becomes larger, it can be accommodated by arranging multiple roof panels in the direction of the slope.

According to the roof structure construction method of the present invention, one roof panel is fixed to a horizontal base material, and then the other roof panel is arranged so that the shedding board of the other roof panel covers the protruding part of one roof panel. Then, butt the ends of the sheathing boards of one roof panel and the other roof panel together, drive a fixing tool into the corbel from above the sheathing board of the other roof panel, and then attach the ends of the sheathing boards of one roof panel and the other roof panel Since the roof panels are fixed in place, roof panels can be easily joined together, improving workability.

FIG. 1 is a perspective view showing the overall configuration of the roof structure of the first embodiment. FIG. 3 is a perspective view showing the configuration of one roof panel. The perspective view which shows the structure of the other roof panel. FIG. 3 is a diagram illustrating a state in which one roof panel is attached to a horizontal base material in a roof structure construction method. A diagram showing the state before the rafters of one roof panel are attached to the eave girder. A diagram showing the state after the rafters of one roof panel are attached to the eave girder. A diagram showing how the rafters of the roof panel are attached to the main building. The figure which shows the state where the rafter of the other roof panel is arrange|positioned between the corbels of one roof panel, and a joining fixture is driven into it. The figure explaining the state where a rafter joint tool penetrates a field board and a rafter, and is nailed to a main building. FIG. 6 is a diagram illustrating a state in which the other roof panel is attached to the horizontal base material in the roof structure construction method. FIG. 2 is a diagram illustrating a completed state of the roof structure of the first embodiment. The exploded view explaining the whole structure of the roof structure of 2nd Embodiment. The exploded view explaining the whole structure of the roof structure of 3rd Embodiment.

<First embodiment>
EMBODIMENT OF THE INVENTION Hereinafter, 1st Embodiment of the roof structure of this invention is described, referring each figure. The roof structure 11 of this embodiment is, for example, a roof structure 11 having a slope such as a gable roof, a shed roof, or a hipped roof. The roof structure 11 is, for example, a roof structure 11 supported by a wooden roof frame, but may be partially or entirely supported by a steel roof frame. As shown in FIG. 1, the roof structure 11 includes a plurality of horizontal base materials 2 that are spaced apart from each other and parallel to each other and perpendicular to the slope direction, and a plurality of roof panels 40 fixed on the horizontal base materials 2. , is equipped with.

The horizontal base material 2 is a plurality of long wooden materials. The horizontal base material 2 is supported by pillars or shed bundles (not shown) and extends in the horizontal direction. The plurality of horizontal base materials 2 are parallel to each other, and the horizontal base materials 2 have a height difference from each other such that the horizontal base materials 2 on the water side are higher and the horizontal base materials 2 on the water side are lower. They are arranged along the roof slope. In the illustrated example, the horizontal base material 2 is arranged in parallel to the eave spar 21 placed furthest below the water, the ridgepole 22 placed furthest above the water, and between the eave spar 21 and the ridgepole 22. It is composed of three main buildings 23. The number of horizontal base materials 2 and the spacing between each horizontal base material 2 are calculated by structural calculation taking into consideration factors such as the shape of the roof, the climate of each region, and the load acting on the roof. The horizontal base material 2 can have a horizontal distance of 1000 mm to 1500 mm, for example, if it is between adjacent main buildings 23. Note that the arrangement of the horizontal base material 2 in FIG. 1 is an example, and the type and shape of the horizontal base material 2 and the number of purlins 23 are not particularly limited.

As shown in FIGS. 1 and 5, the eave girder 21 and the purlin 22 are long wooden materials with a rectangular cross section. Rafter stands 24 for receiving rafters 5 of a roof panel 40, which will be described later, are fixed to the upper surfaces of the eave beams 21 and the purlins 22, respectively. The rafter stand 24 has a groove-shaped notch 25 formed at a location where each rafter 5 is fixed so that the bottom surface has a slope equal to the roof slope. The lower side of the rafter 5 is inserted into the notch 25, as shown in FIG. It is fixed to the purlin 22. Although FIGS. 5 and 6 show the joints between the eave girders 21 and the rafters 5, the joints between the purlins 22 and the rafters 5 also have the same configuration as shown in FIGS. 4 and 10. be.

As shown in FIGS. 1 and 7, the main building 23 has rafter hooks 26 whose upper surfaces are slanted to match the roof slope fixed to the water-side side surface with nails 27, and the rafters 5 of the roof panel 40. By abutting the lower surface of the rafter against the upper surface of the rafter hook 26, each rafter 5 can be stabilized in an inclined state along the roof slope, and the rafter 5 and the main building 23 can be fixed.

The roof panel 40 is a composite panel formed by fixing a roofing board 6 made of plywood and rafters 5 made of square lumber in advance at a factory with fixing tools 43 made of screws or nails. A plurality of roof panels 40 are lined up in the direction of the slope to form a roof slope, and roofing materials such as asphalt roofing and tiles (not shown) are covered on the sheathing boards 6 of the roof panels 40. In the first embodiment, the roof panel 40 is arranged such that two roof panels 40a and 40b are butted against each other in the slope direction. Among the roof panels 40, one roof panel 40a is arranged below the water, and the other roof panel 40b is arranged above the water.

As shown in FIG. 2, one roof panel 40a includes a shedding board 6 and a plurality of rafters 5 fixed to the lower surface of the shedding board 6 in parallel at intervals. The field board 6 is a structural plywood with a thickness of 12 mm, and is formed into a rectangular shape with a width of 2000 mm or less and a length of 3000 mm or more and 4000 mm or less. By having such a size, the roof panel 40a can be lifted up with a crane and placed in a predetermined position without any trouble during construction, and can be easily transported. The rafters 5 are fixed to the shedding board 6 by a plurality of fixtures 43 such as nails driven into the shedding board 6 from above. One roof panel 40a has a protruding portion 53 from which the rafter 5 protrudes from the edge of the shedding board 6. The protruding length L of the protruding portion 53 in the first embodiment is 500 mm. The protruding length L of the corrugated portion 53 is at least shorter than the distance between adjacent main buildings 23 . Further, the protruding length L of the corrugated portion 53 is longer than the length that allows the corrugated portion 53 to be fixed to the shedding board 6 of the other roof panel 40b by nailing a joining fixture 44 such as a nail. The joining fixtures 44 are, for example, thick iron round nails with a length of 50 mm, and three joining fixtures 44 are driven into the corrugated portions 53 of the rafters 5 from above the shedding boards 6 of the other roof panel 40b. , the strength is greater than that required for joining the roof panels 40 together. If the protruding length of the corrugated portion 53 is 500 mm, three joining fixtures 44 can be driven into the corrugated portion 53 from above the shedding board 6 at an appropriate distance.

In this way, by setting the protruding portion 53 to the minimum protrusion length L required for joining the roof panels 40, one roof panel 40a can be easily handled during construction, and construction work can be performed efficiently. I can do it.

Further, one roof panel 40a is formed with rafters 5 protruding from the edge of the roof board 6 on the water side. The portion of the rafter 5 that protrudes below the water is fixed to the eave girder 21. As shown in FIGS. 5 and 6, reference ink 54 is marked on the side surface of the rafter 5 at the position where it contacts the eave girder 21 in order to align the protrusion of the eaves. The width of the rafter 5 of one roof panel 40a extending from the shedding board 6 is determined by the dimension of the eaves of the roof. Note that the rafters 5 of the roof panels 40 other than the roof panel 40a installed closest to the water do not protrude from the shedding board 6 toward the water.

The rafters 5 of one roof panel 40a are long enough to span over the eave girder 21 and the two main buildings 23. The length of the rafter 5 of one roof panel 40a is not limited to this, and may be spanned over three or more main buildings 23.

The spacing between adjacent rafters 5 of the roof panels 40 should be 500 mm or less in accordance with the placement standards for the horizontal base material 2 stipulated in "Allowable Stress Design for Wooden Frame Construction Houses (2017 Edition)" is desirable. Further, it is desirable that the intervals between the plurality of rafters 5 be equal intervals in consideration of ease of allocation and workability, but the intervals do not necessarily have to be equal as long as the intervals are 500 mm or less.

Of the roof panels 40, the other roof panel 40b disposed on the water side is a composite panel in which the shedding board 6 and the rafters 5 are integrated in advance at a factory, like the one roof panel 40a. As shown in FIG. 3, the other roof panel 40b includes a shedding board 6 and a plurality of rafters 5 fixed to the lower surface of the shedding board 6 in parallel at intervals. The rafters 5 are connected and fixed to the shedding board 6 by a plurality of fixing devices 43 driven into the shedding board 6 from above. The rafters 5 of the other roof panel 40b are arranged so as to align with the edges of the sheathing board 6, without protruding from both ends of the shedding board 6.

As shown in FIGS. 1 and 8, the shedding board 6 of the other roof panel 40b is placed on the raised part 53 of the one roof panel 40a, and covers the raised part 53 from above. The protruding portion 53 of one roof panel 40a and the rafters 5 of the other roof panel 40b are arranged to overlap with each other when viewed from the side, and the protruding portion 53 is arranged between the rafters 5 of the other roof panel 40b. It will be done. The projecting portions 53 of one roof panel 40a and the rafters 5 of the other roof panel 40b are alternately arranged at equal intervals, and one roof panel is placed on the shedding board 6 of the other roof panel 40b. When the extending portion 53 of the roof panel 40a is fixed, the bonding strength between the roof panels 40 can be made uniform, and excessive load can be prevented from being applied to a portion.

Three nail joining fixing devices 44 are driven into each of the protruding parts 53 of one roof panel 40a at 150 mm intervals from the top of the sheathing board 6 of the other roof panel 40b, and the protruding parts 53 of one roof panel 40a are The portion 53 and the shedding board 6 of the other roof panel 40b are joined. Further, as shown in FIG. 9, in the main building 23 at the position where the carrying part 53 is arranged, a long piece of paper is inserted through the shedding board 6 of the other roof panel 40b and the carrying part 53 of one roof panel 40a. A single screw rafter connector 55 is driven in, and the projecting portion 53 of one roof panel 40a and the main building 23 are joined. The bonding strength between the protruding portion 53 of one roof panel 40a and the shedding board 6 of the other roof panel 40b using the three joining fixtures 44 is the same as the bonding strength between the protruding portion 53 of one roof panel 40a and the main building using the rafter connectors 55. It has a bonding strength greater than the bonding strength with No. 23.

With the above configuration, one roof panel 40a and the other roof panel 40b can be integrated as the entire roof panel 40 without connecting the respective rafters 5, and the structural strength is strengthened. be able to.

As shown in FIG. 4, the construction method for the roof structure is such that after the eave girder 21, the main building 23, and the ridgepole 22 are constructed on pillars or shed bundles (not shown) to form a roof frame, one roof panel 40a is constructed. is arranged and fixed on the eave girder 21 and the two main buildings 23 adjacent to the eave girder 21. As described above, one roof panel 40a is placed on the rafter stand 24 on the upper part of the eave girder 21 and the rafter hook 26 fixed to the main building 23, with the protruding part 53 of the rafter 5 facing the water side. Ru. Then, as shown in FIG. 5, the lower end of the rafter 5 is fitted into the notch of the rafter stand 24. Then, after the reference ink 54 and the lower corner of the rafter base 24 are aligned and the protruding width of the lower end of the rafter base 24 from the eave girder 21 is aligned, as shown in FIG. A rafter connector 55, which is a long screw, is driven in, and the lower end of the rafter 5 and the eave girder 21 are integrally connected and fixed. At this time, since the reference ink 54 is not hidden by the shedding board 6, the reference ink 54 can be easily aligned with the predetermined position of the eave girder 21, and workability can be improved. Then, as shown in FIG. 7, a long screw-shaped rafter connector 55 is driven into the main building 23 from above the shedding board 6 through the rafter 5 at the part of the main building 23 that contacts the rafter hook 26, and The roof panel 40a is fixed to the eave girder 21 and the main building 23.

Next, as shown in FIG. 10, the other roof panel 40b is placed on the water side of the one roof panel 40a, and placed on the rafter stand 24 above the rafter hook 26 and purlin 22 fixed to the main building 23. do. At this time, a part of the rafter 5 on the underwater side is arranged between the corrugated parts 53 of one roof panel 40a, and the shedding board 6 of one roof panel 40a and the shedding board 6 of the other roof panel 40b are arranged. confronted with each other. Then, in the same manner as in the case of one roof panel 40a, fit the above water side end of the rafter 5 into the rafter base 24 of the purlin 22, and connect the other roof panel with the rafter connector 55, which is a long screw, from above the shedding board 6. 40b and the purlin 22 are integrally connected and fixed. Then, as shown in FIG. 9, a rafter connector 55 made of a long screw is driven into the rafter 5 at a position that contacts the rafter hook 26 of the main building 23 from above the shedding board 6, and the other roof panel 40b is attached to the main building 23. and fixed to the ridgepole 22.

In this way, the roof panel 40 fixed on the horizontal base material 2 consisting of the eave girder 21, the main building 23, and the ridgepole 22 is connected to the shedding board 6 of the other roof panel 40b on one side, as shown in FIG. They are connected to each other by driving a plurality of joining fixtures 44 from above into positions where the projecting portions 53 of the roof panels 40a are aligned. Then, as shown in FIG. 11, each roof panel 40 is installed horizontally in the same manner, and the eave purlin 34 is fixed with screws to the end of the rafter 5 on the eaves side, and An eaves shedding board 51 for the eaves is installed at the end of the timber 5 and on the upper part of the eaves main house 34. Finally, an end shedding board 52 is installed between the gable-side edge of the other roof panel 40b located at the gable-side end of the roof surface and the longitudinal edges of the main building 23 and purlin 22. Then, the roof structure 11 is completed.

In this way, the roof structure 11 of the first embodiment has the rafters 5 of one roof panel 40a and the rafters 5 of the other roof panel 40b arranged in a partially staggered manner. The intervals between the pieces of wood 5 can be made close. Therefore, the structural strength of the joint portion of each rafter 5 can be strengthened without joining the ends of each rafter 5, and the workability can be greatly improved. Furthermore, since the joints between the sheathing board 6 and the rafters 5 do not match, structural weaknesses can be compensated for, and the roof structure 11 can be constructed easily while maintaining the necessary structural strength of the roof. be able to.

<Second embodiment>
Next, the roof structure 12 of the second embodiment will be explained. The same components as the roof structure 11 of the first embodiment are given the same reference numerals, and the description thereof will be omitted. The roof structure 12 of the second embodiment is a roof structure 12 in which three roof panels 40 are arranged side by side in the slope direction. In this embodiment, the two roof panels 40c and 40d, excluding the roof panel 40e closest to the ridge, have a shedding board 6 and a plurality of rafters 5, as shown in FIG. protrudes from the edge of the roof board 6 on the water side to form a raised portion 53. These protruding parts 53 have a protruding length of 500 mm.

Of the two roof panels 40c and 40d on the underwater side, the roof panel 40c closest to the eaves is formed with rafters 5 protruding from the edge of the shedding board 6 on the underwater side. The portion of the rafter 5 that protrudes below the water is fixed to the eave girder 21. In the intermediate roof panel 40d between the roof panel 40e closest to the ridge and the roof panel 40c closest to the eaves, the rafters 5 do not protrude from the sheathing board 6 to the water side, and a protruding portion 53 is provided only on the water side. It is formed. Moreover, the roof panel 40e closest to the ridge has the same form as the other roof panel 40b in the first embodiment, and the rafters 5 of the roof panel 40e do not protrude from both ends of the shedding board 6, and each It is arranged so as to align with the edge of the roof board 6.

The shedding board 6 of the intermediate roof panel 40d is placed on the corbel 53 formed on the water side of the roof panel 40c closest to the eaves so as to cover the corbel 53, and the intermediate roof panel 40d The rafters 5 are arranged so as to sandwich the extending portion 53, and the joining fixture 44 is driven into the extending portion 53 of the roof panel 40c closest to the eaves from above the shedding board 6 of the intermediate roof panel 40d. The projecting portion 53 of the roof panel 40c on the eave side and the shedding board 6 of the middle roof panel 40d are joined. Furthermore, the shedding board 6 of the roof panel 40e closest to the ridge is placed over the corbel 53 formed on the water side of the middle roof panel 40d, and The rafters 5 of the roof panel 40e are arranged so as to sandwich the extending portion 53, and the joining fixture 44 is connected to the extending portion 53 of the intermediate roof panel 40d from above the shedding board 6 of the roof panel 40e closest to the ridge. By driving, the protruding portion 53 of the intermediate roof panel 40d and the shedding board 6 of the roof panel 40e closest to the ridge are joined. The rafters 5 of each roof panel 40, the eave beams 21, the purlins 23, and the ridgepoles 22 are joined by rafter connectors 55, which are long screws driven from above the shedding board 6, as in the first embodiment. ing.

In addition, in the roof panel 40 of this embodiment, in the relationship between the roof panel 40c closest to the eaves and the middle roof panel 40d, the roof panel 40c closest to the eaves is "one roof panel" in the present invention. , the middle roof panel 40d corresponds to the "other roof panel" in the present invention. Further, in the relationship between the intermediate roof panel 40d and the roof panel 40e closest to the ridge, the intermediate roof panel 40d corresponds to "one roof panel" in the present invention, and the roof panel 40e closest to the ridge corresponds to the present invention. This corresponds to "the other roof panel" in .

In this way, the roof panels 40c and 40d on the lower water side, excluding the roof panel 40e closest to the ridge, each have a protruding portion 53 that projects above the water, and the rafters 5 of the roof panel 40 adjacent to the upper water side have Since the protruding portion 53 is arranged and fixed in between, even if the roof becomes larger, it can be accommodated by arranging the plurality of roof panels 40 in the slope direction. In the second embodiment, three roof panels 40 are arranged side by side in the slope direction, but four or more roof panels 40 may be arranged side by side in the slope direction. In this case, a plurality of intermediate roof panels 40d in this embodiment are arranged between the roof panel 40e closest to the ridge and the roof panel 40c closest to the eaves.

<Third embodiment>
Next, the roof structure 13 of the third embodiment will be explained. Structures similar to those of the roof structures 11 and 12 of the first embodiment and the second embodiment are given the same reference numerals and explanations are omitted. Similar to the second embodiment, the roof structure 13 of the third embodiment is a roof structure 13 in which three roof panels 40 are arranged side by side in the slope direction. In this embodiment, the roof panel 40h on the water side, which is disposed closest to the ridge, has a protruding portion 53 that projects from the shedding board 6 to the water side. Further, the roof panel 40f on the water side, which is disposed closest to the eaves, has a protruding portion 53 that protrudes from the shedding board 6 toward the water surface side. Then, between the roof panel 40h on the water side and the roof panel 40f on the water bottom side, a roof panel 40g is arranged in which the ends of the rafters 5 on the water side and the water bottom side are intermediate from the edge of the roof board 6. .

The sheathing board 6 of the middle roof panel 40g is placed over the corbel 53 of the roof panel 40f on the water side that protrudes above the water, and the rafter 5 of the middle roof panel 40g is carried out. The joint fixing tool 44 is driven into the extending portion 53 of the roof panel 40f on the underwater side from above the shedding board 6 of the intermediate roof panel 40g, and the roof panel 40f on the underwater side is placed so as to sandwich the roof panel 40f. The corrugated portion 53 and the sheathing board 6 of the intermediate roof panel 40g are joined. Furthermore, the roof panel 6 of the intermediate roof panel 40g is placed over the corbel 53 of the roof panel 40h on the water side that protrudes to the water side, and the rafters 5 of the intermediate roof panel 40g are arranged so as to cover it. are arranged so as to sandwich the extending portion 53, and the joining fixture 44 is driven into the extending portion 53 of the roof panel 40h on the water side from above the roof board 6 of the intermediate roof panel 40g, and the roof panel 40h on the water side is connected. The corrugated portion 53 and the sheathing board 6 of the intermediate roof panel 40g are joined.

In this way, in the roof structure 13 of the present embodiment, the rafters 5 are arranged in a staggered manner, and the ends of the rafters 5 are subjected to complicated processing to connect the rafters 5 to each other. Since there is no need to match them, construction workability can be greatly improved even on long and large roofs. In addition, since the joints between the sheathing board 6 and the rafters 5 do not match, the structural weakness can be compensated for, and the roof structure 13 can be constructed easily while maintaining the structural strength necessary for the roof. be able to. Then, after positioning the lowest water level and the highest water level using the roof panel 40f on the water side and the roof panel 40h on the water side, the intermediate roof panel 40g is dropped from above, so that the roof panel 40 around the eaves and ridge is positioned. Misalignment can be prevented.

2 Horizontal base material 5 Rafters 6 Sheeting boards 11, 12, 13 Roof structure 40 Roof panel 53 Extrusion part

Claims (6)

a plurality of horizontal base materials arranged parallel to each other at intervals and having a height difference forming a roof slope;
A roof structure comprising a plurality of roof panels fixed on the horizontal base material and laid side by side in the slope direction,
The roof panel has a shedding board and rafters fixed to the lower surface of the shedding board in parallel with each other at intervals, and perpendicular to the horizontal base material,
Of the two roof panels that are adjacent to each other in the slope direction, the rafter of one roof panel has a protruding part that protrudes from the edge of the roof board, and the protruding part extends from the rafter of the other roof panel. arranged between and fixed to the shedding board of the other roof panel,
The protruding length of the raised portion is shorter than the distance between the adjacent horizontal base materials,
A roof structure characterized in that the corrugated portion and the other roof panel are fixed to the same horizontal base material. The one roof panel is fixed to the horizontal base material with the corrugated portion facing the water side,
The roof structure according to claim 1, wherein the other roof panel is arranged on the water side of the one roof panel and fixed to the horizontal base material. 3. The roof structure according to claim 1, wherein the corrugated portions of the one roof panel and the rafters of the other roof panel are alternately arranged at equal intervals. A roof structure in which three or more of the roof panels are arranged side by side in the slope direction,
The roof panels on the water side, excluding the roof panel closest to the ridge, each have the corrugated portions protruding toward the water side, and the corrugated portions are provided between the rafters of the roof panels adjacent to the water side. A roof structure according to any one of claims 1 to 3, characterized in that it is arranged and fixed. A roof structure in which three or more of the roof panels are arranged side by side in the slope direction,
The roof panel on the water side has the corrugated portion protruding to the water side, and the roof panel on the water side has the corrugated portion projecting to the water side, and the roof panel on the water side and the corrugated portion protrude to the water side. Claims 1 to 3 are characterized in that an intermediate roof panel is arranged between the side roof panels in which the above-water side and below-water side ends of the rafters do not protrude from the edge of the shedding board. The roof structure according to any of Item 3. A roof structure construction method for constructing the roof structure according to any one of claims 1 to 5, comprising:
fixing the one roof panel to the horizontal base material, and then arranging the other roof panel so that the shedding board of the other roof panel covers the raised portion of the one roof panel, butt the ends of the sheathing boards of the one roof panel and the other roof panel,
A method for constructing a roof structure, characterized in that the one roof panel and the other roof panel are fixed by driving a fixing tool into the corbel from above the shedding board of the other roof panel.

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