JP4723426B2 - Roof plate and roof structure - Google Patents

Description

  The present invention relates to a roof plate and a roof structure that prevent rainwater flowing on the surface of a roof from jumping over a side wall.

2. Description of the Related Art Conventionally, a roof plate that is formed in a wavy shape and efficiently allows rainwater to flow down through the valley portion thereof is known. And as such a roofing board, the ridge part of the roofing board is given a non-slip uneven pattern, and the trough part of the roofing board is given a flowing water pattern along the valley part, so that the rainwater flows into the valley part. Have been proposed (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-30305

  However, in the roof board as proposed above, rain water can flow smoothly in the valley, but depending on the inclination angle when the roof board is installed and the amount of rain water, it flows in the valley. In the meantime, the flow rate of rainwater increased, and there was a problem that rainwater jumped over the reeds installed on the lower end side of the roof plate.

  In addition, in a building such as a station building that has conventionally used a roof plate made of a material having a high surface friction coefficient (for example, a slate material), the roof of the roof is made of a metal roof plate in terms of safety and durability. For example, as shown in FIG. 8, when the roof is replaced using a metal roof plate 90 formed in the same shape (simple wave shape) as shown in FIG. There is a risk that the rainwater will jump over the bunker 8.

  In other words, if the roof is replaced with a metal roof plate 90 having the same shape as the conventional one, the friction coefficient on the surface of the metal material is much smaller than that of the slate material. As shown in FIG. 8 (b), depending on the amount of rain, the rainwater speed increases compared to the conventional case, while the inclination angle of the roof plate and the positional relationship with the reeds cannot be changed from those of the conventional roof. In addition, rainwater jumps over the ridge 8.

  8A is an enlarged cross-sectional view showing the configuration of the lower end side of the roof when a roof plate 90 having the same shape as that of a conventional roof plate is arranged, and FIG. It is explanatory drawing which shows the flow of the water at the time of flowing water.

  The present invention has been made in view of such a problem, and a roof plate capable of smoothly flowing water flowing down a trough portion of a roof plate formed in a wavy shape into a side wall without jumping out from the side wall, and a roof structure The purpose is to provide.

The invention according to claim 1, which has been made to achieve the object,
It is a roof board that is made of a corrugated plate material in which the crests and troughs are formed substantially continuously in parallel, and is inclined so as to pour the water flowing through each trough into the side wall provided on the lower end side. ,
On one side of the roof plate, and at one end side of each trough, at least one linear protrusion protrudes in a direction to block each trough,
The end on the side where the protrusion is provided is curved to the opposite side to the direction in which the protrusion is protruded ,
The linear protrusion is divided in a direction perpendicular to the protrusion, and a part of the water flowing through the valley is allowed to pass between the protrusions .

  Thus, in the roof plate of the present invention, at least one linear protrusion protrudes from one end side of each valley portion on one surface side of the roof plate in a direction to block each valley portion. The end portion on the provided side is curved on the opposite side to the direction in which the protrusion is projected.

Therefore, according to the roof plate of the present invention, when it is arranged to be inclined with the end on the curved side downward, the water flowing through the valley collides with the linear protrusion at the lower end of the roof plate. The flow velocity is reduced, and the curved end is efficiently guided to the side, so that the water flowing through the troughs of the roofing board can be prevented from jumping over the side and splashing. Can be poured.
In addition, when it is arranged with the curved end facing downward, a part of the water flowing on the surface of the roofing board can flow through the part where the projections are divided. Garbage and sand piled up can pass through the protrusions together with water. For this reason, it is possible to prevent dust and sand from being caught by the protrusions and deposited on the roof plate.

  Next, the invention according to claim 2 is the roof plate according to claim 1, wherein the valley portion is composed of a bottom portion formed with a constant width, and a side wall portion connected to the mountain portion on both sides of the bottom portion. The linear protrusion is formed at least on the bottom.

  Therefore, according to the roof board according to claim 2, when it is arranged to be inclined with the end on the curved side downward, for example, the roof board is inclined in the left-right direction. Even when it flows along the corners formed at the bottom and side walls, the protrusion can disperse the water throughout the bottom and suppress the flow rate, so that the water jumps over the side and more It can be surely prevented.

  Next, the invention according to claim 3 is the roof plate according to claim 2, wherein the roof plate is arranged in a slanted manner with the end of the curved side being inclined downward. The inclination angle of the bottom part on the lower end side is formed so as to be larger than the inclination angle of the bottom part on the upper end side than the protrusion.

  Therefore, according to the roof plate of the third aspect, when the curved side end portion is inclined downward, the bottom portion on the lower end side of the protrusion has an inclination angle larger than that of the bottom portion on the upper end side. Since it becomes larger, the water collides with the protrusion to suppress the flow velocity, and the direction is changed downward along the bottom portion on the lower end side of the protrusion, so that the water can be poured more reliably into the reed.

Next, the invention according to claim 4 includes the roof plate according to any one of claims 1 to 3 , and a reed that is disposed substantially horizontally and receives water flowing through a valley portion of the roof plate. The roof plate is arranged so that the end of the curved side is located above the side wall, and is inclined so that the water flowing through the valley portion of the roof board flows into the side wall. To do.

Therefore, according to the roof structure of the fourth aspect , by using the roof plate according to any one of the first to third aspects, the water flowing through the roof plate is surely poured into the side wall and the water flowing through the roof plate. It is possible to construct a roof structure that can prevent the fly from jumping over the reeds.

Next, the invention according to claim 5 is the roof structure according to claim 4 , in which the end surface of the valley portion on the curved side is in the vicinity of the surface passing through the center in the width direction of the side wall. It is arranged as follows.

Therefore, according to the roof structure of the fifth aspect , the side curved downward of the roof plate, that is, the end surface of the bottom portion on the lower end side is in the vicinity of the surface that is above the side wall and passes through the center in the width direction. Therefore, the water whose flow velocity is suppressed by the linear protrusions can be poured into the reed more reliably.

Next, the invention according to claim 6 is characterized in that in the roof structure according to claim 4 or claim 5 , a pair of roof boards are provided, and these roof boards are arranged in a mountain shape.
Therefore, according to the roof structure of the sixth aspect , in the mountain-shaped roof, it is possible to prevent the water flowing through the valleys of the respective roof boards from jumping over the reeds.

Next, the invention of claim 7 includes a pair of shingle according to any one of claims 1 to 3, arranged substantially horizontally, Yokodoi Prefecture for receiving water flowing through the valleys of the roof plate The pair of roofing boards are arranged so that the end portions on the curved sides are located above the reeds, and the water flowing through the troughs of each reeding sheet is poured into the reeds. It is characterized by being inclined.

Therefore, according to the roof structure of the seventh aspect , using the roof plate according to any one of the first to third aspects, the water flowing through the valley portion of the roof plate is surely poured into the side wall, It is possible to construct a roof structure that can be prevented from jumping over the side wall and scattering. That is, in a valley-like roof where a floor is provided in the center and roof boards are disposed on both sides, water flowing through the roof boards can be prevented from jumping over the floor.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
In the present embodiment, the roof plate and the roof structure of the present invention are applied to a station building installed on a platform 6 of the station. FIG. 1 is a side view showing the appearance of the station building 1 of the present embodiment. 2 (a) is an enlarged cross-sectional view (part A of FIG. 1) showing the positional relationship between the lower end of the roof plate 10 and the reed 8 and FIG. 3 (a) is a front view showing the detailed shape of the end of the roof plate 10. FIG. 3 and a top view, FIG. 3B are cross-sectional views (cross-section C of FIG. 3A) showing the detailed shape of the end portion of the roof plate 10.

  As shown in FIG. 1, the station building 1 of the present embodiment includes a roof 2 in which a pair of roof boards 10 are arranged in a mountain shape, and a support structure 4 that supports the roof 2 from below. Near each lower end of the roof 2 of the structure 4 (that is, below the lower end side of each roof plate 10), a horizontal bar 8 is provided in parallel with the upper surface of the home 6.

  As shown in FIG. 3, the roof plate 10 has a flat top portion 12 formed in a certain width, and a peak portion including a first side wall portion 18 inclined downward on both sides of the top portion 12, and the top portion 12. A flat bottom portion 16 (16a to 16c) that is wide and has a constant width parallel to the top portion 12, and a second side wall portion that is inclined upward on both sides of the bottom portion 16 and is connected to the first side wall portion 18 of the mountain portion. The trough part which consists of 14 is comprised from the corrugated metal board | plate material provided in parallel substantially continuously. And it is supported by the support structure 4 in the state inclined so that the rain water which flows through each trough part may be poured into the reed 8 provided in the lower end side.

  In addition, on the lower end side of the roof plate 10, a linear protrusion 20 (having a semicircular cross section in a direction to block rainwater flowing from the first side wall portion 18 to the second side wall portion 14 and the bottom portion 16. 20a, 20b) are provided in two rows in parallel.

  The inclination angle of the second bottom portion 16b on the lower end side from the first protrusion 20a on the upper end side is larger by a predetermined angle Θ1 than the inclination angle of the first bottom portion 16a on the upper end side than the first protrusion 20a. The inclination angle of the third bottom portion 16c on the lower end side of the two protrusions 20b is formed to be larger by the angle Θ1 than the inclination angle of the second bottom portion 16b, and the lower end of the roof plate 10 is the direction in which the protrusions 20 protrude. It is curved toward the opposite side, that is, downward.

Each protrusion 20 is divided into two in a direction orthogonal to the protrusion 20 so that a part of rainwater flowing on the upper surface of the bottom portion 16 can pass between the protrusions 20.
In the present embodiment, a hot-dip aluminized steel sheet (for example, an Alster steel sheet manufactured by Nisshin Steel Co., Ltd.) having excellent weather resistance is used as a metal plate material constituting the roof plate 10. Then, one end side of the corrugated plate material composed of peaks and troughs is press-molded using a dedicated press die in which a projection corresponding to the projection 20 is provided at a corner bent at a predetermined angle. Thus, the projections 20 are formed one by one, and the bottom 16 on the end side of the projection 20 (for example, the second bottom 16b on the end side of the first projection 20a) is connected to the bottom 16 on the opposite side of the projection 20. (For example, it is processed so as to form a predetermined angle Θ1 with respect to the first bottom portion 16a on the opposite side across the first protrusion 20a).

  As shown in FIG. 2 (a), the reed 8 has a semicircular cross section, and the opening side is located at a position where the center line of the semicircle substantially overlaps the lower end edge of the bottom 16 of the roof plate 10. It is arranged toward the.

  As described above, the station building 1 of the present embodiment is disposed substantially horizontally below a pair of roof boards 10 that are inclined in a mountain shape and below the lower end side of the roof boards 10. And a reed 8 for receiving rainwater flowing through the valley. And the linear processus | protrusion 20 in the direction which interrupts each trough part on the lower end side of the upper surface of the roofing board 10 inclined and poured so that the rain water which flows through each trough part may be poured into the reed 8 provided in the lower end side. Are projected in two rows, and the end on the side where the projections 20 are provided is curved on the side opposite to the direction in which the projections 20 are projected, that is, downward.

  Therefore, according to the station building 1 of the present embodiment, as shown in FIG. 4A, rainwater flowing through the valleys of the roof plate 10 collides with the linear protrusions 20 at the lower end of the roof plate 10 to suppress the flow velocity. In addition, since it is efficiently guided to the reed 8 by the curved end, the rainwater that has flowed through the valleys of the roof plate 10 jumps over the reed 8 and scatters as shown in FIG. 4 (b). Can be prevented. Here, Fig.4 (a) is explanatory drawing which shows the flow of the water at the time of flowing water on the roofboard 10, and FIG.4 (b) is the case where water is flowed on the roofboard 10 before press molding. It is explanatory drawing which shows the flow of water.

  Moreover, the trough part of the roof board 10 has the bottom part 16 formed in a certain width, and the second side wall part 14 (corresponding to the side wall part of the present invention) connected to the first side wall part 18 of the mountain part on both sides of the bottom part 16. ), And the linear protrusion 20 is formed from the first side wall portion 18 to the second side wall portion 14 and the bottom portion 16, so that the roof plate 10 is inclined in the left-right direction, for example. For example, even when rainwater flows along the corners formed in the bottom 16 and the second side wall 14, the projection 20 can disperse rainwater over the entire valley and suppress the flow velocity. Further, it is possible to more reliably prevent rainwater from jumping over the reed 8 and scattering.

  Further, the roof plate 10 is formed such that the inclination angle of the bottom portion 16 on the lower end side with respect to the linear protrusion 20 is larger than the inclination angle of the bottom portion 16 on the upper end side with respect to the protrusion 20. 20, the flow velocity is suppressed and the direction is changed downward along the bottom 16 on the lower end side of the protrusion 20, so that water can be poured into the recumbent vessel 8 more reliably.

  In the roof plate 10 of the present embodiment, since the projections 20 are provided in two rows, the rainwater dispersed in the whole valley including bubbles by colliding with the projections in the first row is further added in the second row. Since the flow velocity is decelerated by colliding with the projection, the rainwater can be poured into the reed 8 along the curved end.

  Further, the horizontal bar 8 is arranged with the opening side facing upward so that the center line of the semicircle is substantially overlapped with the lower end edge of the bottom 16 of the roof plate 10. In other words, since the lower end edge of the roof plate 10 is disposed in the vicinity of the surface passing through the center of the width direction of the horizontal surface 8, rainwater whose flow velocity is suppressed by the linear protrusion 20 is more reliably poured into the horizontal surface 8. be able to.

  By the way, in the station building 1 of this embodiment, it experimented in order to confirm that the rain water which flows through the roof board 10 flows into the side wall 8 without jumping over the side wall 8. In the experiment, the total length is about 3 m, the pitch width L1 of the peaks and valleys is about 130 mm, the projection width L2 (on the bottom portion 16) is about 12 mm, the projection height H1 (on the bottom portion 16) is about 6 mm, and the spacing between the projections. The roof plate in which L3 is about 30 mm and the angle Θ1 formed by the bottom part sandwiching the protrusion 20 is 5 ° is inclined to a slope assuming a 2 inch gradient and a 4.5 inch gradient roof, and from the upper end of the roof plate It was confirmed by flowing 500 ml of water (the amount of water that assumed torrential rain), and in this experiment, it was confirmed that all of the poured water surely flowed into the reed 8 without jumping over it.

  Moreover, in the roof board 10 of this embodiment, the linear protrusion 20 is divided | segmented in the direction orthogonal to this protrusion 20, and some rainwater which flows through a trough part is allowed to pass between the protrusions 20. Therefore, the dust and sand accumulated on the roof plate 10 can pass through the protrusions 20 together with rainwater. For this reason, it is possible to prevent dust and sand from being caught on the protrusions 20 and accumulating on the roof plate 10.

  By the way, if it is configured so that the speed of rainwater is suppressed by attaching a member for controlling the amount of water to the roof plate by bonding or fastening, and the rainwater is poured into the side, the manufacturing process becomes complicated, and the roof Since the usage environment is severe, the attached member may be detached or damaged.

  On the other hand, in the present embodiment, the construction is such that rainwater is surely poured into the recumbent ridge 8 by the press-molded roof plate 10 on one end side of the corrugated metal plate composed of peaks and valleys. It is easy and manufacturing costs can be reduced. In addition, since the roof plate 10 is a simple plate material having no bonding portion or fastening portion, durability is also good.

  In particular, the roof plate 10 is formed by press molding using a dedicated press die in which a projection corresponding to the projection 20 is formed at a corner bent at a predetermined angle. The formation of 20 and the process of bending the lower end can be performed at once by a simple process. The degree of bending can be adjusted by the number of projections 20 to be formed (that is, the number of press moldings).

  By the way, in the case of a general building such as a house, it is unlikely that a person who is not holding an umbrella will be underneath the bubo in rainy weather, and it is rare that problems such as the water jumping over the buoy hit the person. is there. However, people who try to get on the train at the platform of the station get on the train without wearing an umbrella from inside the station building. Especially in such a station building, if rainwater scatters over the side, There is a problem that the person who gets in gets wet.

  Therefore, according to the station building 1 of the present embodiment, rain water is prevented from jumping from the side wall 8 and reliably flows into the side wall 8, so that it is possible to prevent rain water from being applied to a person who tries to get on the train.

  In addition, according to the roof board 10 of this embodiment comprised in this way, the rain water which flows through the trough part of the roof board 10 collides with the linear protrusion 20 at the lower end of the roof board 10 by the structure of the lower end side. Since the flow velocity is reduced and the curved end is efficiently guided to the side wall 8, when only the roof plate is replaced, that is, the support structure and the side wall are the conventional ones. Even when the roof plate 10 is arranged at the same inclination angle, it is possible to prevent the rainwater flowing through the valleys of the roof plate 10 from jumping over the reed 8 and scattering.

  Further, when the roof board is replaced, in order to prevent rainwater from jumping over the side wall and scattering, it is costly to shift the side wall or to install a new side wall. According to the above, it is possible to replace the roof at a low cost without replacing the support structure and the reed.

In the first embodiment, as shown in FIG. 2A, the horizontal bar 8 is a round bar having a semicircular cross section, but various types of bar can be considered. For example, FIG. You may make it use the square ridge formed so that the side wall facing the end surface of the roof board 10 may be higher than the side wall on the opposite side, like a horizontal ridge 70 shown in b). In this way, rainwater flowing out from the roof plate 10 can be received more reliably without being scattered. Here, FIG. 2 (b) is an enlarged cross-sectional view showing the positional relationship between the lower end side of the roof plate 10 and the reed 70.
[Second Embodiment]
In the present embodiment, the roof plate and the roof structure of the present invention are applied to the station building installed in the platform 6 of the station. FIG. 5A is a side view showing the appearance of the station building 5 of the present embodiment. FIG. 5 and FIG. 5B are enlarged cross-sectional views (portion B in FIG. 5A) showing the positional relationship between the lower end side of the roof plate 50 and the reed 56.

  As shown in FIG. 5A, the station building 5 according to the second embodiment supports a roof 52 in which a pair of roof plates 50 are arranged in a valley shape so that the central portion is lowered, and the roof 52 from below. The support structure 54 is configured to have a horizontal section 56 at the center of the T-shaped horizontal portion of the support structure 54 having a substantially T-shaped cross section, that is, below the lower end side of each roof plate 50. Is provided in parallel with the upper surface of the home 6.

  The roof plate 50 is made of a corrugated metal plate material having the same shape as the roof plate 10 of the first embodiment, and is inclined so as to pour water flowing through each trough into a side wall 56 provided on the lower end side. Is supported by the support structure 54.

And the lower end side of the roof board 50 is formed in the same shape as the roof board 10 by being curved downwardly with the projections 20, and the end part on the upper end side is curved vertically downward.
As shown in FIG. 5 (b), the reed 56 is a square reed having a rectangular cross section, and is disposed below the lower end side of the pair of roof boards 50 with the opening side upward.

  As described above, the station building 5 according to the present embodiment is arranged with the horizontal fence 56 supported by the support structure 54 so as to be parallel to the platform 6 and the horizontal fence 56 so that one end is located above the horizontal fence 56. And a pair of roof plates 50 arranged so as to be inclined so as to flow the water flowing through the valleys of the respective roof plates into the reed 56.

  Then, two rows of linear protrusions 20 are projected on the lower end side of the upper surface of the roof plate 50 in a direction to block each valley portion, and the end portion on the side where the protrusions 20 are provided is connected to the protrusion 20. It is curved on the side opposite to the protruding direction, that is, downward.

  Therefore, according to the station building 5 of 2nd Embodiment, the rainwater which flows through the trough part of a pair of roofing board 50 can be poured into the one side wall 56 arrange | positioned between the roofing boards 50, and rainwater It is possible to prevent the leopard 56 from jumping over and scattering. In addition, the shape of the lower end side of the roof board 50 is the same shape as the roof board 10 of 1st Embodiment, and also in 2nd Embodiment, the effect similar to the effect obtained by the roof board 10 of 1st Embodiment is obtained. Obtainable.

As mentioned above, although one Embodiment of this invention was described, it cannot be overemphasized that this invention can take a various form.
In each said embodiment, although the material of the roof board was made into the steel plate, it is not restricted to a steel plate, Other metal materials, such as aluminum, may be used, and a resin material may be used.

  Moreover, although each said embodiment demonstrated the example which applied the roof board and roof structure of this invention to the station building, it is not restricted to a station building, It is possible to apply to various buildings. Also, the inclination angle of the roof is not limited to the 2 inch gradient and 4.5 inch gradient in which the experiment was performed, and the roof plate can be arranged to be inclined at any angle.

  In addition, about the dimension of a processus | protrusion, and the angle which the bottom part of the upper end side of a processus | protrusion and a lower end side make, it is not restricted to said value used for experiment, It can shape | mold by various values. And it cannot be overemphasized that the effect mentioned above is acquired also in the roof board shape | molded by the dimension different from said dimension.

  Moreover, in each said embodiment, although the processus | protrusion 20 was provided in 2 rows in the direction which interrupts | blocks the water which flows through each part at the lower end of the roof board, the inclination angle of a roof board, rainfall, the friction coefficient of the raw material surface, etc. By appropriately changing the number of protrusions based on the various conditions, it is possible to reliably guide rainwater to all sides under all conditions.

  For example, when the inclination angle is loose, the projections 20 may be arranged in a row as in the roof plate 30 shown in FIG. 6. For example, in an area where there is a lot of rain for a short time, the roof plate shown in FIG. For example, as shown in FIG.

  Here, in the roof plate of each of the embodiments described above, the projections 20 are formed one by one by press molding, and at the same time, the bottom portion on the end side of the projection 20 is predetermined with respect to the bottom portion on the opposite side across the projection 20. However, the same press mold is also used for molding the roof plate 30 and the roof plate 40 shown in FIGS. 6 and 7. For this reason, the lower end side of the roof plate 30 on which the projections 20 are formed in one row is less curved than the roof plate 10 or the roof plate 50 in which the projections 20 are formed in two rows, and the projections 20 are formed in three rows. The lower end side of the roof plate 40 is curved downward as compared with the roof plate 10 or the roof plate 50. Therefore, the number of protrusions can be selected based on the positional relationship between the reed and the roofboard so that rainwater can be more reliably guided to the reed.

  However, it is not always necessary to incline the bottom part on the lower end side of the protrusion simultaneously with the formation of the protrusion. For example, the protrusion may be formed after the lower end side is curved. It may be curved. In addition, it is not always necessary to use the same press mold to form a plurality of rows of protrusions. For example, the first row and the second row of protrusions may be formed using different press dies. A row of protrusions may be formed.

  6A is a front view and a top view showing the detailed shape of the end portion of the roof plate 30, and FIG. 6B is a cross-sectional view showing the detailed shape of the end portion of the roof plate 30 (FIG. 6 ( 7A is a cross-sectional view D), FIG. 7A is a front view and a top view showing the detailed shape of the end portion of the roof plate 40, and FIG. 7B is the detailed shape of the end portion of the roof plate 40. It is sectional drawing shown (cross section E of Fig.7 (a)).

It is a side view which shows the external appearance of the station building 1 of 1st Embodiment. 3 is an enlarged cross-sectional view showing the positional relationship between the lower end side of the roof plate 10 and the reed 8. FIG. FIG. 3 is a front view, a top view, and a cross-sectional view showing a detailed shape of an end portion of the roof plate 10. It is explanatory drawing which shows the flow of the water at the time of flowing water through the roof board 10. FIG. It is a side view which shows the external appearance of the station building 5 of 2nd Embodiment. It is the front view which shows the detailed shape of the edge part of the roofboard 30, a top view, and sectional drawing. It is the front view which shows the detailed shape of the edge part of the roof board 40, a top view, and sectional drawing. It is an expanded sectional view which shows the positional relationship of the lower end side of the conventional roof board 90, and the recumbency 8.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Station building, 2 ... Roof, 4 ... Support structure, 5 ... Station building, 6 ... Home, 8 ... Recumbent, 10 ... Roof board, 12 ... Top part, 14 ... 2nd side wall part, 16 ... Bottom part, 16a ... 1st bottom part 16b ... second bottom, 16c ... third bottom, 18 ... first side wall, 20 ... projection, 20a ... first projection, 20b ... second projection, 30 ... roof, 40 ... roof, 50 ... roof , 52 ... Roof, 54 ... Support structure, 56 ... Recumbent, 70 ... Recumbent, 90 ... Roof plate

Claims (7)

It is a roof board that is made of a corrugated plate material in which the crests and troughs are formed substantially continuously in parallel, and is inclined so as to pour the water flowing through each trough into the side wall provided on the lower end side. ,
On one side of the roof plate, and at one end side of each trough, at least one linear protrusion protrudes in a direction to block each trough,
The end on the side where the protrusion is provided is curved to the opposite side to the direction in which the protrusion is protruded ,
The linear protrusion is divided in a direction perpendicular to the protrusion, and a part of water flowing through the valley is allowed to pass between the protrusions . The trough is
A bottom formed in a certain width;
A side wall connected to the mountain on both sides of the bottom,
Consists of
The roof plate according to claim 1, wherein the linear protrusion is formed at least on the bottom portion. In the case where the roof plate is disposed with the end on the curved side facing downward,
The roof board according to claim 2, wherein an inclination angle of a bottom portion on a lower end side of the linear protrusion is larger than an inclination angle of a bottom portion on an upper end side of the protrusion. The roof plate according to any one of claims 1 to 3 ,
A recumbent which is arranged substantially horizontally and receives water flowing through the valley of the roof plate;
With
The roof plate is disposed so that an end portion on the curved side is located above the side wall, and is inclined so that water flowing through a valley portion of the roof plate flows into the side wall. A roof structure characterized by that. 5. The roof structure according to claim 4 , wherein the roof plate is disposed such that an end surface of a valley portion on a curved side is in the vicinity of a surface passing through a center in a width direction of the side wall. The roof structure according to claim 4 or 5 , comprising a pair of roof plates, wherein the roof plates are arranged in a mountain shape. A pair of roofing boards according to any one of claims 1 to 3 ,
A recumbent that is arranged substantially horizontally and receives the water flowing through the valleys of each roof plate,
Prepared,
The pair of roofing boards are arranged with the side walls sandwiched so that the curved ends thereof are located above the side walls, and water flowing through the valleys of the roofing boards is poured into the side walls. The roof structure is characterized by being arranged so as to be inclined.

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