Drainage structure of roof

Abstract

PURPOSE: To obtain a drainage structure of a roof that is excellent in drainage of rainwater and easy to construct.CONSTITUTION: A downstream-side end of an upstream-side metal plate roof A1 and an upstream-side end of a downstream-side metal plate roof A2 are placed in a direction crossing obliquely, and a clearance part S is covered with a rainwater guide B. A cross-sectionally deformed U-shaped intermediate gutter 1 is placed in a direction in which a rainwater receiving raised part 11 crosses obliquely to the width direction of the downstream-side metal plate roof A2, and a lower-end portion in the inclined direction of the intermediate gutter 1 is provided up to a side end of the metal plate roof A. The intermediate gutter 1 is fixed to a gutter base member 2 and a chevron-shaped reinforcing member 3 provided in the width direction of the downstream-side metal plate roof A2, and rainwater guided from the rainwater guide B into the intermediate gutter 1 is drained from the end portion of the intermediate gutter 1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a roof drainage structure that is excellent in rainwater drainage and easy to construct.

Background Art

[0002] Corrugated slates are often used as roofs for large buildings (such as warehouses or factories). As the slate roof material of the slate roof ages, the roof must be repaired. In recent years, in such repair work, the existing roof is left as it is, and a new roof is often constructed on top of the existing roof.

[0003] That is, since the existing roof remains as it is, the interior of the building can continue to be used even during the repair work. For example, if the building is a factory, workers can continue to work indoors even while the repair work is being carried out. Similarly, if the building is a warehouse, goods can be stored even during the repair work.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a repaired roof, when the roof area is large, the area where rain hits becomes large. Therefore, when heavy rain falls intensively, the amount of rain flowing from the upper side to the lower side of the roof due to the roof gradient also becomes large, and in the eaves gutter, the amount of rain exceeds the allowable capacity, causing rainwater to overflow from the eaves gutter, and as a result, a large amount of moisture is applied to the wall surface of the building and the like. If this continues for a long time, it will cause the building to deteriorate.

[0006] In order to prevent such a situation, Patent Document 1 (Japanese Patent Application Laid-Open No. 2010-209627) exists. According to this Patent Document 1, an auxiliary gutter is provided on the roof so that rainwater can be drained well together with the eaves gutter. However, points that should be further improved have been found in the invention disclosed in Patent Document 1. Therefore, the object to be solved by the present invention is to realize a drainage structure of the roof in a further improved repaired roof.

Means for Solving the Problems

[0007] Therefore, as a result of intensive research to solve the above problems, the inventor has covered the existing roof with a metal roof consisting of a corrugated upper-water metal plate roof and a lower-water metal plate roof having the same shape as the upper-water metal plate roof and provided with a gap portion at a predetermined interval in the roof inclination direction. In a roof provided with an eaves gutter or a valley gutter, the lower-water end portion of the upper-water metal plate roof and the upper-water end portion of the lower-water metal plate roof facing each other in the roof inclination direction are placed in a direction obliquely crossing the width direction of the metal roof, and are configured to cover the upper surface of the gap portion in the direction obliquely crossing as described above with a rainwater guide having the same cross-sectional shape as the upper-water metal plate roof. The inclination degree of the rainwater guide is formed to be less inclined than the inclination angle of the upper-water metal plate roof. An intermediate gutter having a cross-sectionally deformed U-shape with a rainwater receiving rising portion, a bottom portion, and an upper-water mounting portion is placed inclined in the width direction of the lower-water metal plate roof with the rainwater receiving rising portion as the lower side of the roof. The terminal at the lower position in the inclination direction of the intermediate gutter is provided up to the side end of the metal roof. A mountain-shaped reinforcing member facing the roof inclination direction of the lower-water metal plate roof is fixed to the lower-water metal plate roof at a predetermined interval in the width direction of the lower-water metal plate roof. The lower end of the rainwater guide, closer to the lower end, is placed on the upper-water mounting portion of the intermediate gutter and fixed to a gutter base member provided in the width direction of the lower-water metal plate roof fixed to the lower-water metal plate roof. The gutter base member is also fixed to the mountain-shaped reinforcing member. The lower end of a gutter fixing member that supports the rainwater receiving rising portion of the intermediate gutter from the outside is fixed on the lower-water metal plate roof and to the mountain-shaped reinforcing member. Rainwater flowing from the rainwater guide into the intermediate gutter is configured to be drained from the terminal of the intermediate gutter. By adopting the drainage structure of the roof characterized by the above, the above problems have been solved.

[0008] The invention according to claim 2 is the drainage structure of the roof according to claim 1, wherein the rainwater guide is composed of a rainwater guide body, and the upper end portion of the rainwater guide is attached in a superposed state below the lower end portion of the upper metal plate roof, thereby solving the above problems. The invention according to claim 3 is the drainage structure of the roof according to claim 2, wherein the gentle slope portion of the rainwater guide body is formed through a zigzag portion formed by unevenness, thereby solving the above problems.

[0009] The invention according to claim 4 is the drainage structure of the roof according to claim 2, wherein the gentle slope portion of the rainwater guide body is formed by curving the underwater side of the rainwater guide body upward, thereby solving the above problems. The invention according to claim 5 is the drainage structure of the roof according to claim 1, wherein the upper metal plate roof has a structure in which its lower end and the rainwater guide portion that is the rainwater guide are integrated, thereby solving the above problems.

[0010] The invention according to claim 6 is the drainage structure of the roof according to claim 5, wherein the gentle slope portion of the rainwater guide portion is formed through a zigzag portion formed by unevenness, thereby solving the above problems. The invention according to claim 7 is the drainage structure of the roof according to claim 5, wherein the gentle slope portion of the rainwater guide portion is formed by curving the underwater side of the rainwater guide portion upward, thereby solving the above problems.

[0011] In the invention according to claim 8, in the roof drainage structure according to claim 1 or 2, the intermediate gutter is formed with stepped portions along the longitudinal direction in the rainwater receiving rising portion and the upper water side mounting portion, and the longitudinal direction of the intermediate gutter is inclined stepwise through the stepped portions, thereby solving the above problems. In the invention according to claim 9, in the roof drainage structure according to claim 7, the rainwater receiving rising portion and the upper water side mounting portion of the intermediate gutter are linear and parallel, thereby solving the above problems.

Effect of the Invention

[0012] In the invention according to claim 1, due to the configuration in which the upper water side portion of the rainwater guide covering the upper water side portion of the intermediate gutter is arranged to be covered by the upper water side metal plate roof, the rainwater flowing on the upper water side metal plate roof can be transferred to the rainwater guide without leaking to the back surface of the upper water side metal plate roof as it is, and the rainwater guide can surely receive the flowing-down rainwater and flow out the rainwater to the intermediate gutter as it is. Further, the lower water side end portion of the upper water side metal plate roof is located above the upper water side end portion of the rainwater guide, and dust, withered leaves, etc. flowing down together with the rainwater can smoothly move to the rainwater guide, and it is also possible to prevent them from soiling the back surface sides of the upper water side metal plate roof and the rainwater guide.

[0013] Furthermore, by providing a gap portion between the lower water side end portion of the upper water side metal plate roof and the upper water side end portion of the lower water side metal plate roof, the weight of the metal plate roof can be reduced, so that it can offset the weight with the rainwater guide, and an increase in weight due to the rainwater guide can be suppressed. Further, due to the existence of a gap portion between the upper water side metal plate roof and the lower water side metal plate roof, there is no continuity between the upper water side metal plate roof and the lower water side metal plate roof, and construction can be carried out from either the upper water side metal plate roof or the lower water side metal plate roof.

[0014] In the invention of claim 2, the upper water-side metal plate roof and the rainwater guide body constituting the rainwater guide are separate members different from each other. And since the upper end portion of the rainwater guide body constituting the rainwater guide cannot be attached in a superposed state below the lower end portion (the back side) of the upper water-side metal plate roof, rainwater flowing down the upper water-side metal plate roof can flow directly into the rainwater guide body without leaking to the existing roof side located below the upper water-side metal plate roof. And rainwater can flow well from the upper water-side metal plate roof to the rainwater guide body and be sent directly into the intermediate gutter, enabling extremely good drainage of rainwater.

[0015] In the invention of claim 3, by forming a zigzag portion with irregularities at the location where the inclination of the rainwater guide body constituting the rainwater guide changes, it is possible to extremely easily form a gently inclined portion region and a roof inclined portion region with different inclination angles on the rainwater guide body. In the invention of claim 4, by bending the underwater side of the rainwater guide upward, a gently inclined portion region can be formed on the rainwater guide body extremely easily. In the invention of claim 5, since the upper water-side metal plate roof has a structure in which a rainwater guide portion, which is a rainwater guide, is integrated at its lower end, the number of parts is reduced, and construction can be carried out simply and in a short time.

[0016] In the invention of claim 6, by forming a zigzag portion provided with recesses and bulges at the portion where the inclination of the rainwater guide changes, a gently inclined portion region and a roof inclined portion region with different inclination angles can be formed on the rainwater guide portion extremely easily. In the invention of claim 7, a gently inclined portion region can be formed on the rainwater guide portion extremely easily.

[0017] In the invention of claim 8, the intermediate gutter is configured such that stepped portions are formed along the longitudinal direction in the rainwater receiving rising portion and the upper water-side attachment portion, and the longitudinal direction of the intermediate gutter is inclined stepwise via the stepped portions, so that the intermediate gutter can be easily and gently inclined in the longitudinal direction (X direction) and installed on the lower water-side metal plate roof. In the invention of claim 9, since the rainwater receiving rising portion and the upper water-side attachment portion of the intermediate gutter are linear and parallel, the intermediate gutter can be made into an extremely simple shape.

Brief Description of the Drawings

[0018]

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Embodiments for Carrying Out the Invention

[0019] Hereinafter, embodiments of the roof drainage structure in the present invention will be described with reference to the drawings. Further, the present invention mainly includes an upper - side metal - plate roof A1, a lower - side metal - plate roof A2, a rainwater guide B, an intermediate gutter 1, a gutter base member 2, a gable - shaped reinforcing member 3, and a gutter fixing member 4 [see Fig. 1(A)]. Furthermore, the present invention is premised on a renovated roof. Therefore, in addition to the above - mentioned components, an existing roof C is added as a component. And the upper - side metal - plate roof A1 and the lower - side metal - plate roof A2 form a metal - plate roof A as a whole of the building. In the present invention, for the sake of convenience of explanation, the X - direction and the Y - direction are used as expressions indicating directions.

[0020] The X direction is the width direction of the roof. In other words, it is a direction orthogonal and horizontal to the water flow direction from the upper water side to the lower water side (or from the lower water side to the upper water side), and is sometimes generally called the girder row direction. Also, the Y direction is the inclination direction of the roof. In other words, it is the direction connecting the upper water side and the lower water side of the roof, and is a direction orthogonal to the width direction (girder row direction) of the roof. In the description of the present invention, the X direction and the Y direction described for each of the main members all follow the X direction and the Y direction described in the drawings.

[0021] The above-described upper water side metal plate roof A1, lower water side metal plate roof A2, rainwater guide B, intermediate gutter 1, gutter base member 2, gable-shaped reinforcing material 3, and gutter fixing material 4 are all based on the state in which the metal plate roof A is configured (see FIGS. 1(A), 2(A), 3(A), 4(A), etc.), and the X direction and the Y direction are applied in this reference state. The Y direction and the X direction are described in the main drawings. Also, in the present invention, the metal plate roof A is provided with an eaves gutter or a valley gutter. Since known general ones are used for the eaves gutter and the valley gutter, the description thereof is omitted.

[0022] The present invention has a plurality of embodiments. First, the first and second embodiments of the present invention are outlined, and then the first and second embodiments are described in detail. In the first embodiment, the rainwater guide B is composed of a rainwater guide body B1, and the upper end portion of the rainwater guide B is attached in a superposed state below the lower end portion of the upper water side metal plate roof A1. Also, In the second embodiment, the upper water side metal plate roof A1 has a structure in which its lower end and the rainwater guide portion B2, which is the rainwater guide B, are integrated.

[0023] Next, a first embodiment of the present invention will be described. First, the upper-side metal plate roof A1, the lower-side metal plate roof A2, and the rainwater guide B will be described, and then the intermediate gutter 1, the gutter base member 2, the gable-shaped reinforcing member 3, and the gutter fixing member 4 will be described. The upper-side metal plate roof A1, the lower-side metal plate roof A2, and the rainwater guide B are substantially corrugated in their width direction (X direction). The upper-side metal plate roof A1 is composed of a plurality of upper-side roof plates 5, 5,... [see FIGS. 1(B) and 2], and the upper-side roof plates 5 are formed from thin sheet metal materials [see FIG. 2(C)].

[0024] In the description of the present invention, here, among the plurality of upper-side roof plates 5, 5,... that constitute the upper-side metal plate roof A1, those that are connected in the width direction in an appropriate number and have the lower-side end and the upper-side end aligned in the roof inclination direction are a set of upper-side roof plates 5, 5,... that constitute the upper-side metal plate roof A1, and there are a plurality of such sets to form the upper-side metal plate roof A1. Among the plates 5, 5,..., and a plurality of such sets are provided to constitute the upper-side metal plate roof A1.

[0025] For the convenience of explanation of the present invention and to make it easier to understand, for the plurality of upper-side roof plates 5, 5,..., a set is formed by connecting two upper-side roof plates 5, 5 in the width direction. However, the number of upper-side roof plates 5 included in this set is not limited to two, and it may be composed of 1, 3, 4, 5 or more upper-side roof plates 5.

[0026] In the state where the upper-side metal plate roof A1 is constructed, in each upper-side roof plate 5, in the longitudinal direction and the installed roof inclination direction is the Y direction. Also, the width direction orthogonal to the roof inclination direction is the X direction [see FIG. 2(C)]. That is, the longitudinal direction (Y direction), which is the inclination direction of the upper-side metal plate roof A1, follows the flow direction of the roof (the direction from the upper side to the lower side), and in this state, it is arranged on the existing roof C.

[0027] ​​The upper water-side roof plate 5 has a substantially corrugated cross-section along the roof width direction (X direction). Specifically, it consists of a peak portion 51 and a bottom portion 52, and the peak portion 51 and the bottom portion 52 are alternately continuous along the width direction (X direction) to form a substantially corrugated shape [see Figs. 2(B) and (C)]. And, the peak portions 51 at both ends in the width direction (X direction) of the adjacent upper water-side roof plates 5, 5 overlap each other, and the adjacent upper water-side roof plates 5, 5 are connected in the width direction (X direction) [see Fig. 2(B)]. In the width direction (X direction), the peak portions 51 at both ends in the width direction (X direction) of the adjacent upper water-side roof plates 5, 5 overlap each other, and the adjacent upper water-side roof plates 5, 5 are connected in the width direction (X direction) [see Fig. 2(B)].

[0028] The cross-sectional shape of the peak portion 51 is formed in a substantially trapezoidal shape, and inclined pieces are formed on both sides in the width direction of the top piece. Specifically, four peak portions 51, 51,... are formed on one upper water-side roof plate 5 [see Fig. 2(C)]. Also, the bottom portion 52 is a flat surface, and a flat convex portion may be formed on the bottom portion 52 along the Y direction.

[0029] As described above, the upper water-side metal roof A1 is constructed from a plurality of upper water-side roof plates 5, 5,.... The lower side of the upper water-side roof plates 5, 5,... of the upper water-side metal roof A1 is installed to be stepped in accordance with the rainwater guide plate B1 described later. Specifically, when a plurality of sets of the upper water-side roof plates 5, 5 are arranged in the roof width direction (X direction), the lower-side ends of the upper water-side roof plates 5 of each set are arranged with a stepwise shift [see Figs. 8(E), (F), 13(A), (A-1), (B), (B-1)]. The lower side of the upper water-side roof plates 5, 5,... of the upper water-side metal roof A1 is installed to be stepped in accordance with the rainwater guide plate B1 described later. Specifically, when a plurality of sets of the upper water-side roof plates 5, 5 are arranged in the roof width direction (X direction), the lower-side ends of the upper water-side roof plates 5 of each set are arranged with a stepwise shift [see Figs. 8(E), (F), 13(A), (A-1), (B), (B-1)]. is installed to be stepped in accordance with the rainwater guide plate B1 described later. Specifically, when a plurality of sets of the upper water-side roof plates 5, 5 are arranged in the roof width direction (X direction), the lower-side ends of the upper water-side roof plates 5 of each set are arranged with a stepwise shift [see Figs. 8(E), (F), 13(A), (A-1), (B), (B-1)].

[0030] Next, the lower water-side metal roof A2 is composed of a plurality of lower water-side roof plates 6, 6,... The lower water-side roof plate 6 has the same shape as the upper water-side roof plate 5, and the cross-section in the width direction has the same cross-sectional shape [see Fig. 2(C)]. The lower water-side roof plate 6 is formed from a thin metal material, has a substantially corrugated shape along the roof width direction (X direction), and consists of a peak portion 61 and a bottom portion 62, and the peak portion 61 and the bottom portion 62 are alternately continuous in the width direction (X direction).

[0031] Then, the gable portions 61, 61 at both ends in the width direction (X direction) of the adjacent underwater roof plates 6, 6 are overlapped, and the adjacent underwater roof plates 6, 6 are connected in the width direction ( X direction). The gable portion 61 is equivalent to the gable portion 51 of the upper water roof plate 5, and its cross-sectional shape is formed in a substantially trapezoidal shape, with inclined pieces formed on both sides in the width direction of the top piece. Specifically, similar to the upper water roof plate 5, four gable portions 61, 61,... are formed on the underwater roof plate 6.

[0032] The plurality of underwater roof plates 6 that make up the underwater metal roof A2 are configured in a set with an appropriate number connected in the width direction. And, in combination with the upper metal roof A1, among the plurality of underwater roof plates 6, 6,... in the underwater metal roof A2, two underwater roof plates 6, 6 connected in the width direction are taken as a set. However, the number of underwater roof plates 6 included in this set is not limited to two, and it may be composed of one, three, four, five or more underwater roof plates 6. Furthermore, at the upper water end in the longitudinal direction (Y direction), which is the inclined direction of the underwater roof plate 6, the bottom surface portion 62 of this end portion is raised upward, and a rising wall portion 63 that serves as a weir may be formed by bending with respect to the inclined surface of the gable portion 61 [see Fig. 2(C)]. This is to prevent the rainwater flowing into the bottom surface portion 62 of the underwater roof plate 6 from overflowing from the upper water end.

[0033] The plurality of upper water roof plates 5, 5,... that make up the upper metal roof A1 and the plurality of underwater roof plates 6, 6,... that make up the underwater metal roof A2 are the existing roof C, a slate roof.

[0034] The plurality of upper water roof plates 5, 5,... that make up the upper metal roof A1 and the plurality of underwater roof plates 6, 6,... that make up the underwater metal roof A2 are the existing roof C, a slate roof. The plurality of underwater roof plates 6, 6,... that make up the underwater metal roof A2 are the existing roof C, a slate roof. It is installed so as to have the same gradient or substantially the same gradient as the roof gradient in the roof inclination direction (Y direction). Therefore, the inclination angles of the roof gradients of the upper water-side metal plate roof A1 and the lower water-side metal plate roof A2 are equal or substantially equal (see Fig. 1).

[0035] Next, there are two types of rainwater guides B, one of which is the rainwater guide body B1. In addition, in the rainwater guide B, there is also a rainwater guide part B2 in addition to the rainwater guide body B1. The rainwater guide part B2 will be described later. The rainwater guide body B1 is an independent and single structure different from the upper water-side metal plate roof A1 and the lower water-side metal plate roof A2.

[0036] The rainwater guide body B1 is composed of a plurality of guide plate materials 7, 7,.... The guide plate material 7 has the same shape as the upper water-side roof plate material 5 and the lower water-side roof plate material 6, and the cross-section in the roof width direction (X direction) is the same cross-sectional shape. That is, the guide plate material 7 is also formed from a thin metal material, is substantially corrugated along the roof width direction (X direction), and consists of a peak part 71 and a bottom part 72, and the peak part 71 and the bottom part 72 are continuously arranged alternately in the roof width direction (X direction).

[0037] Then, the peak parts 71, 71 at both ends in the width direction (X direction) of the guide plate materials 7, 7 adjacent in the width direction (X direction) are overlapped, and the adjacent guide plate materials 7, 7 are connected. The peak part 71 is the same as the peak parts 51 and 61 of the upper water-side roof plate material 5 and the lower water-side roof plate material 6, and the cross-sectional shape is formed in a substantially trapezoidal shape, and inclined pieces are formed from both sides in the width direction of the top piece. Specifically, the guide plate material 7 is formed with four peak parts 71, 71,... in the same way as the upper water-side roof plate material 5 and the lower water-side roof plate material 6.

[0038] In this way, the rainwater guide body B1 is connected in the width direction by a plurality of guide plate materials 7, 7,... It is configured. And, in accordance with the upper water-side metal plate roof A1 and the lower water-side metal plate roof A2, among the plurality of guide plate materials 7, 7,... of the rainwater guide body B1, two guide plate materials 7, 7 that are connected in the width direction are taken as a set. However, the number of the guide plate materials 7 is not limited to two, and it may be composed of one, three, four, five or more guide plate materials 7.

[0039] In this way, since the upper water-side roof plate material 5 that constitutes the upper water-side metal plate roof A1 and the guide plate material 7 that constitutes the rainwater guide body B1 are separate materials, the rainwater guide body B1 installed on the existing roof C is superposed so that the lower end portion (lower water-side end portion) in the longitudinal direction (Y direction) of the upper water-side metal plate roof A1 is located above the upper end portion (upper water-side end portion) in the longitudinal direction (Y direction) which is the roof inclination direction of the rainwater guide body B1, and it can be configured to be attached to the existing roof C in this superposed state [see FIGS. 4, 8(E) and (E1)]. That is, the peak portion 61 and the bottom surface portion 62 of the roof plate material 6 that constitutes the upper water-side metal plate roof A1, and the peak portion 71 and the bottom surface portion 72 of the guide plate material 7 that constitutes the rainwater guide body B1 are superposed in a substantially close contact state.

[0040] As described above, by superposing the lower end portion (lower water-side end portion) in the longitudinal direction (Y direction) of the upper water-side metal plate roof A1 above the upper end portion (upper water-side end portion) in the longitudinal direction (Y direction) which is the roof inclination direction of the rainwater guide body B1, the rainwater flowing on the upper water-side metal plate roof A1 moves to the rainwater guide body B1 without leaking out to the back surface of the upper water-side metal plate roof A1 as it is, and the rainwater guide body B1 can receive the rainwater and flow down smoothly from the upper water-side metal plate roof A1, and the rainwater can be discharged to the intermediate gutter 1 as it is. And, the lower water-side end of the upper water-side metal plate roof A1 is located above the upper water-side end of the rainwater guide body B1, and dust, dead leaves, etc. flowing down together with the rainwater can smoothly move to the rainwater guide body B1, and it is also possible to prevent the back surface sides of the upper water-side metal plate roof A1 and the rainwater guide body B1 from being soiled.

[0041] A plurality of guide plate members 7, 7,... of the rainwater guide body B1 are formed such that the inclination of the lower part below the center along the longitudinal direction (Y direction), which is the roof inclination direction, is slightly gentler than the inclination of the upper metal plate roof A1. The gently inclined part of the guide plate member 7 of the rainwater guide B is referred to as the gently inclined portion 7k. The inclination angle of the gently inclined portion 7k of the rainwater guide B is smaller and gentler than the inclination angles of the roof slopes of the upper metal plate roof A1 and the lower metal plate roof A2 (see FIGS. 1(A), 3(A), (B), 4, etc.).

[0042] The rainwater guide body B1 serves to receive rainwater flowing down from the upper metal plate roof A1 of the metal plate roof A by the guide plate members 7 constituting the rainwater guide body B1 and pour it into the intermediate gutter 1 to be described later. Therefore, the gently inclined portion 7k of the guide plate member 7 is inclined so as to descend downward from the upper side to the lower side. The gently inclined portion 7k is formed by forming a substantially bellows-shaped zigzag portion 73 provided with recesses and bulges at 71 corrugated portions (see FIG. 4).

[0043] The zigzag portion 73 formed by the unevenness is formed at a substantially intermediate position in the longitudinal direction (Y direction), which is the roof inclination direction, of the corrugated portion 71. Specifically, a recessed portion 73a having a flat V-shaped cross section along the width direction (X direction) is formed at the top of the corrugated portion 71, and bulging portions 73b having a triangular convex cross section along the width direction (X direction) are formed on the inclined surfaces on both sides in the width direction at the top. These recessed portion 73a and bulging portion 73b are adjacent and continuous in the longitudinal direction (Y direction) and constitute the bellows-shaped zigzag portion 73.

[0044] And the gently inclined portion 7k of the rainwater guide body B1 is formed via the zigzag portion 73. Specifically, the corrugated portion 71 of the guide plate member 7 is bent by the zigzag portion 73, and the inclination angle changes with the zigzag portion 73 as a boundary, so that the gently inclined portion 7k part and the roof inclined portion 7h part can be formed (see FIG. 4(C)). The roof inclined portion 7h of the guide plate member 7 is a part having the same roof inclination angle as the upper metal plate roof A1 and the lower metal plate roof A2.

[0045] Furthermore, as a means of forming the gently sloping portion 7k of the guide plate material 7 that constitutes the rainwater guide body B1, the gently sloping portion 7k of the rainwater guide body B1 is formed by curving the underwater side of the rainwater guide body B1 upward. Specifically, the underwater side in the longitudinal direction (Y direction) of the guide plate material 7 that constitutes the rainwater guide body B1 is curved, and this curved portion constitutes the gently sloping portion 7k. This is to make the guide plate material 7 that constitutes the rainwater guide body B1 have a convex arc shape with the underwater side downward, that is, an arc-shaped warp is formed along the longitudinal direction (Y direction) (see Fig. 9). The warped portion of this guide plate material 7 is defined as the gently sloping portion 7k.

[0046] And it is preferable that the gently sloping portion 7k formed as the warped portion is in the region on the lower side from approximately the middle position in the longitudinal direction (Y direction) which is the roof inclination direction of the guide plate material 7. The gently sloping portion 7k formed as the arc-shaped warped portion is formed by the gutter base member 2 described later lifting the vicinity of the underwater side end of the guide plate material 7 upward (see Figs. 11(A), (B), Figs. 12(A), (B)). Alternatively, it may also be formed by providing a convex arc-shaped bulge that protrudes downward in the region on the underwater side from the middle position in the longitudinal direction (Y direction) of the guide plate material 7.

[0047] Next, the intermediate gutter 1 will be described. First, the compositional relationship between the intermediate gutter 1, the upper-side metal plate roof A1, the lower-side metal plate roof A2, and the rainwater guide B will be outlined and then described in detail. The underwater side end of the upper-side metal plate roof A1 and the upper-side end of the lower-side metal plate roof A2 that faces it in the roof inclination direction are placed in a direction that obliquely crosses in the width direction (X direction) of the metal plate roof A.

[0048] It is configured such that a rainwater guide B having the same cross-sectional shape as the upper water-side metal plate roof A1 covers the upper surface of the gap S in the obliquely crossing direction described above. The inclination of the rainwater guide B is formed to be gentler than the inclination angle of the upper water-side metal plate roof A1. An intermediate gutter 1 having a deformed U-shaped cross-section is formed by a rainwater receiving rising portion 11, a bottom portion 12, and an upper water-side mounting portion 13. The rainwater receiving rising portion 11 is inclined in the width direction (X direction) of the lower water-side metal plate roof A2 with the roof lower water side, and the lower end of the intermediate gutter 1 in the lower position in the inclination direction is provided up to the side end of the metal plate roof A.

[0049] A gable-shaped reinforcing member 3 facing the roof inclination direction (Y direction) of the lower water-side metal plate roof A2 is fixed to the lower water-side metal plate roof A2 at a predetermined interval in the width direction (X direction) of the lower water-side metal plate roof A2. While the lower end side of the rainwater guide B is placed on the upper water-side mounting portion 13 of the intermediate gutter 1, it is fixed to a gutter base member 2 provided in the width direction (X direction) of the lower water-side metal plate roof A2 fixed to the lower water-side metal plate roof A2. The gutter base member 2 is also fixed to the gable-shaped reinforcing member 3. The lower end of the support member 41 of the gutter fixing member 4 that supports the rainwater receiving rising portion 11 of the intermediate gutter 1 from the outside is fixed on the lower water-side metal plate roof A2 and to the gable-shaped reinforcing member 3. The rainwater that has flowed from the rainwater guide B into the intermediate gutter 1 is configured to be drained from the terminal of the intermediate gutter 1.

[0050] As described above, the intermediate gutter 1 is formed in a deformed U-shaped cross-section by the rainwater receiving rising portion 11, the bottom portion 12, and the upper water-side mounting portion 13 (see FIGS. 5(A), (B), and (C)). Also, the longitudinal direction of the rainwater guide B is along the substantially X direction. The rainwater receiving rising portion 11 is a rising portion located on the lower water side in a direction orthogonal to the longitudinal direction. The bottom portion 12 is equal to the inclination angle of the lower water-side metal plate roof A2, and in a state where the intermediate gutter 1 is placed on the lower water-side metal plate roof A2, the rainwater receiving rising portion 11 is set to be substantially vertical (see FIG. 5(B)).

[0051] The upper water-side mounting portion 13 is configured to be located on the upper water side in a direction orthogonal to the longitudinal direction of the intermediate gutter 1. The upper water-side mounting portion 13 is formed with a steep inclined surface 13a that is steeper than the bottom portion 12, a substantially vertical wall surface 13b is formed above the upper end of the steep inclined surface 13a, and a substantially horizontal mounting top surface 13c is formed above the upper end of the vertical wall surface 13b. The mounting top surface 13c is a portion fixed to a gutter base member 2 described later (see FIG. 5(B)).

[0052] The intermediate gutter 1 is separated into a plurality of parts along the longitudinal direction (X direction), and these separated parts are connected and used (see FIG. 5(D)). Each of the separated individual intermediate gutters 1 is referred to as a gutter unit 1A. The gutter unit 1A has a rainwater receiving rising portion 11, a bottom portion 12, and an upper water-side mounting portion 13, and is separated at the step portions 11t of the rainwater receiving rising portion 11 and the step portions 13t of the upper water-side mounting portion 13. Then, by connecting a plurality of gutter units 1A, 1A,... in the X direction, one intermediate gutter 1 can be formed (see FIG. 5(D)).

[0053] The intermediate gutter 1 is provided with step portions 11t and 13t at the rainwater receiving rising portion 11 and the upper water-side mounting portion 13, respectively (see FIGS. 5(A), (B), (D)). Along the longitudinal direction (X direction) of the rainwater receiving rising portion 11, step portions 11t, 11t,... are formed at equal intervals, and in a state where the longitudinal direction of the intermediate gutter 1 is placed along the width direction (X direction) of the lower metal plate roof A2 , the plurality of step portions 11t are set to gradually descend along the longitudinal direction (X direction) from the uppermost position of the rainwater receiving rising portion 11 and reach the lowermost position at the longitudinal end (see FIGS. 2(A), 8(E), (F), 13(B)).

[0054] The upper water-side mounting portion 13 is also formed with step portions 13t, 13t,... at equal intervals along the longitudinal direction (X direction) in substantially the same manner as the rainwater receiving rising portion 11, and the longitudinal direction of the intermediate gutter 1 is the width of the lower metal plate roof A2 In a state of being placed along the direction, it is set to gradually descend along the longitudinal direction from the uppermost position of the water-side mounting portion 13 by the plurality of stepped portions 13t and reach the lowermost position at the longitudinal end (see FIGS. 2(A), 8(E), (F), and 13(B)). Further, the positions of the stepped portions 11t, 11t,... of the rainwater receiving rising portion 1 and the stepped portions 13t, 13t,... of the water-side mounting portion 13 are set to be slightly offset along the longitudinal direction.

[0055] The intermediate gutter 1 is formed in a substantially zigzag shape or a substantially broken line shape along the longitudinal direction (X direction) by the plurality of stepped portions 11t, 11t,... of the rainwater receiving rising portion 11 and the plurality of stepped portions 13t, 13t,... of the water-side mounting portion 13. The intermediate gutter 1 placed on the underwater metal roof A2 is installed in a direction that obliquely crosses the width direction of the underwater metal roof A2 with the rainwater receiving rising portion 11 as the underwater side (see FIGS. 8(E), (F), 13(B), and (B-1)). Specifically, the intermediate gutter 1 is installed on the underwater metal roof A2 in a gently inclined state so as to descend from above (water side) to below (underwater side) in the roof inclination direction (Y direction) along the roof width direction (X direction) of the underwater metal roof A2. There is another embodiment of the intermediate gutter 1. In this other embodiment, the rainwater receiving rising portion 11 and the water-side mounting portion 13 are configured to be linear and parallel with the bottom portion 12 interposed therebetween. Specifically, both the rainwater receiving rising portion 11 and the water-side mounting portion 13 are formed as linear rising surfaces along the longitudinal direction (X direction) (see FIGS. 14 and 15).

[0056] The gutter base member 2 is long in the longitudinal direction (X direction), and its longitudinal direction (X direction) is installed along the width direction (X direction) of the underwater metal roof A2 (see FIGS. 1(A), 3(A), (B), 7

[0057] (C), and (C-1)). Further, the length of the gutter base member 2 in the longitudinal direction (X direction) is substantially equal to the length in the width direction (X direction) of a set of underwater roof plates 6, 6 constituting the underwater metal roof A2. (C), and (C-1)). Further, the length of the gutter base member 2 in the longitudinal direction (X direction) is substantially equal to the length in the width direction (X direction) of a set of underwater roof plates 6, 6 constituting the underwater metal roof A2. (See FIGS. 7(C) and 7(C-1)). Here, since two lower underwater roof plates 6 and 6 are taken as a set, the length of the gutter base member 2 in the longitudinal direction (X direction) is substantially equal to the width of the lower underwater roof plates 6 and 6 connected in the width direction.

[0058] The gutter base member 2 has a base portion 21 with a substantially trapezoidal cross-section formed in the center in a cross-section orthogonal to the longitudinal direction (X direction), that is, in the Y-direction cross-section, and attachment pieces 22 and 22 are formed on both sides in the width direction orthogonal to the longitudinal direction of the base portion 21. And the gutter base member 2 constitutes the lower underwater metal roof A2 The attachment pieces 22 and 22 of the gutter base member 2 are installed on the peak portions 61 of the lower underwater roof plates 6 that constitute the lower underwater metal roof A2, and the gutter base member 2 is fixed to the lower underwater metal roof A2 with a fixing tool such as a screw. Also, the longitudinal direction (X direction) of the gutter base member 2 is installed so as to be orthogonal to the longitudinal direction (Y direction) of the peak portions 61 of the lower underwater roof plates 6 ( See FIGS. 7(C) and 7(C-1)).

[0059] Here, the mountain-shaped reinforcing member 3 is accommodated in the inner surface (inside) of the peak portion 61 of the lower underwater roof plate 6 where the gutter base member 2 is installed, and the attachment pieces 22 and 22 of the gutter base member 2 are fixed to the mountain-shaped reinforcing member 3 with a fixing tool such as a screw through the peak portion 61 (see FIG. 3(D)). That is, the gutter base member 2 is also firmly supported by the mountain-shaped reinforcing member 3 together with the peak portion 61 of the lower underwater roof plate 6 (see FIG. 3). Although not particularly shown, the mountain-shaped reinforcing member 3 may be placed and fixed on the outer surface (upper side) of the peak portion 61 of the lower underwater roof plate 6.

[0060] As described above, the length of the gutter base member 2 in its longitudinal direction (X direction) is substantially equal to the length in the width direction (X direction) of the lower underwater roof plates 6 and 6 connected in a set of the lower underwater metal roof A2 and is formed. And a plurality of gutter base members 2 are fixed to the upper end portion (lower underwater end portion) of the lower underwater metal roof A2 (see FIGS. 7(C) and 7(C-1)). The base of the gutter base member 2 The lower end portion (underwater side end portion) of the guide plate material 7 of the rainwater guide body B1 and the mounting top surface 13c of the upper water side mounting portion 13 of the intermediate gutter 1 are placed on the top surface 21a of the portion 21 and fixed with a fixing tool such as a screw (see Fig. 3(B)).

[0061] The mountain-shaped reinforcing member 3 is long in the longitudinal direction (Y direction) which is the roof inclination direction, and is fixed on a continuous base material 91 described later. The mountain-shaped reinforcing member 3 has a length in the longitudinal direction (Y direction) that is the length of the installation position of the gutter base member 2 and the length of the range covering the installation locations in the flow direction (Y direction) of the gutter fixing member 4 described later (see Fig. 3(A)). The cross-sectional shape of the mountain-shaped reinforcing member 3 perpendicular to the longitudinal direction (Y direction) is a substantially hat shape, with a reinforcing convex portion 31 and mounting pieces 32, 32 formed on both sides in the width direction (X direction) of the reinforcing convex portion 31, and the mounting pieces 32, 32 are fixed to the continuous base material 91 with a fixing tool such as a screw (see Fig. 3(D)).

[0062] And, the mountain-shaped portion 61 of the underwater roof plate 6 constituting the underwater metal roof A2 is covered on the reinforcing convex portion 31 of the mountain-shaped reinforcing member 3, and the underwater metal roof A2 is installed on the existing roof C through the continuous base material 91. That is, at the position of the underwater metal roof A2 where the intermediate gutter 1, the gutter base member 2, and the gutter fixing member 4 are arranged, the underwater metal roof A2 is reinforced by the mountain-shaped reinforcing member 3 from the lower surface side of the mountain-shaped portion 61 of the underwater metal roof A2, and the support members 41 of the gutter base member 2 and the gutter fixing member 4 are firmly fixed on the mountain-shaped portion 61, and the intermediate gutter 1 serves to be installed on the underwater metal roof A2 in a stable state (see Fig. 3).

[0063]

[0064] The gutter fixing member 4 serves to fix the intermediate gutter 1 placed on the underwater metal roof A2 to the lower metal roof A2 (see Fig. 1(A), Figs. 3(A) to (C)). The gutter fixing member 4 is composed of a support member 41 and a tension member 42. The support member 41 is formed by bending a strip-shaped metal plate. The support member 41 consists of a mounting base portion 41a, a rising portion 41b, and a locking portion 41c, and forms a substantially L-shaped (or inverted L-shaped) shape by the mounting base portion 41a and the rising portion 41b.

[0064] The attachment base 41a is placed on the ridge portion 61 of the underwater roof plate material 6 that constitutes the underwater metal plate roof A2, and is fixed to the underwater metal plate roof A2 with a fixing tool such as a screw, whereby the support member 41 is fixed on the underwater metal plate roof A2 (see FIGS. 3(A) and (C)). The rising portion 41b serves to support the rainwater receiving rising portion 11 of the intermediate gutter 1 placed on the underwater metal plate roof A2 so as to suppress it from the underwater side. The locking portion 41c locks to the upper end of the rainwater receiving rising portion 11 of the intermediate gutter 1 and serves to firmly support the intermediate gutter 1 (see FIGS. 3(A) and (C)). and is fixed to the underwater metal plate roof A2 with a fixing tool such as a screw, whereby the support member 41 is fixed on the underwater metal plate roof A2 (see FIGS. 3(A) and (C)). The rising portion 41b serves to support the rainwater receiving rising portion 11 of the intermediate gutter 1 placed on the underwater metal plate roof A2 so as to suppress it from the underwater side. The locking portion 41c locks to the upper end of the rainwater receiving rising portion 11 of the intermediate gutter 1 and serves to firmly support the intermediate gutter 1 (see FIGS. 3(A) and (C)). 1b serves to support the rainwater receiving rising portion 11 of the intermediate gutter 1 placed on the underwater metal plate roof A2 so as to suppress it from the underwater side. The locking portion 41c locks to the upper end of the rainwater receiving rising portion 11 of the intermediate gutter 1 and serves to firmly support the intermediate gutter 1 (see FIGS. 3(A) and (C)). 1b serves to support the rainwater receiving rising portion 11 of the intermediate gutter 1 placed on the underwater metal plate roof A2 so as to suppress it from the underwater side. The locking portion 41c locks to the upper end of the rainwater receiving rising portion 11 of the intermediate gutter 1 and serves to firmly support the intermediate gutter 1 (see FIGS. 3(A) and (C)). 1b serves to support the rainwater receiving rising portion 11 of the intermediate gutter 1 placed on the underwater metal plate roof A2 so as to suppress it from the underwater side. The locking portion 41c locks to the upper end of the rainwater receiving rising portion 11 of the intermediate gutter 1 and serves to firmly support the intermediate gutter 1 (see FIGS. 3(A) and (C)).

[0065] The tension member 42 is made of a metal material and has a strip shape. The tension member 42 is disposed between the locking portion 41c of the support member 41 and the underwater end portion of the rainwater guide body B1 (see FIGS. 3(A), (B), (C)). One end (underwater end) in the longitudinal direction (Y direction) of the tension member 42 is fixed to the locking portion 41c of the support member 41 with a fixing tool such as a screw, and the other end (upper water end) is fixed to the underwater end portion of the rainwater guide body B1 with a fixing such as a screw.

[0066] In this way, the support member 41 prevents the intermediate gutter 1 from falling due to the pressure of rainwater applied to the rainwater receiving rising portion 11 of the intermediate gutter 1, and firmly fixes the intermediate gutter 1 to the underwater metal plate roof A2. A plurality of support members 41 are provided and are attached at substantially equal intervals along the longitudinal direction (X direction) of the intermediate gutter 1 placed on the underwater metal plate roof A2 (see FIGS. 8(B) and (C)).

[0067] Next, the process of constructing the first embodiment of the present invention will be described. FIG. 6 shows the construction process in the first embodiment divided into steps (1) to (6) as seen from the side in only the Y direction connecting the upper water side and the underwater side. FIGS. 7 and 8 show the construction process in eight steps (A) to (F) as seen planarly.

[0068] First, in an existing roof C such as a corrugated slate of a sign curve, a continuous base material 91 is installed at predetermined intervals along the width direction (X direction) in parallel [see Fig. 7(A)]. Next, the mountain-shaped reinforcing material 3 is fixed to the adjacent continuous base materials 91, 91 with a fixing tool such as a screw so that its longitudinal direction (Y direction) is along the flow direction (Y direction) of the existing roof C [see Fig. 6(1), Fig. 7(A), (A-1)].

[0069] Next, the underwater roof plate material 6 that constitutes the underwater metal plate roof A2 is installed and fixed to the continuous base material 91 [see Fig. 6(2), Fig. 7(B), (B-1)]. At this time, the peak portion 61 of the underwater roof plate material 6 is installed so as to cover the mountain-shaped reinforcing material 3. In this way, the underwater metal plate roof A2 is constructed from a plurality of underwater roof plate materials 6, 6,.... The upper side of the underwater metal plate roof A2 becomes stepped as the underwater roof plate materials 6, 6,... are installed in accordance with the shape of the intermediate gutter 1 and the inclination angle in the longitudinal direction (X direction). Specifically, when a plurality of sets of the underwater roof plate materials 6, 6 as a set are arranged in the roof width direction, the upper ends of the underwater roof plate materials 6 in each set are arranged stepwise along the shape of the rainwater receiving rising portion 11 of the intermediate gutter 1 [see Fig. 7(B), (B-1)].

[0070] Next, the gutter base member 2 is installed and fixed at the upper end portion (upper side end portion) of the underwater metal plate roof A2 [see Fig. 6(3), Fig. 7(C), (C-1)]. Then, the rainwater guide body B1 is installed on the gutter base member 2 [see Fig. 6(3), Fig. 8(D), (D-1)]. Specifically, the position near the underwater side end of the gently inclined portion 7k of the guide plate material 7 that constitutes the rainwater guide body B1 is installed and fixed on the gutter base member 2, and the roof inclined portion 7h of the guide plate material 7 is installed and fixed on the continuous base material 91. The underwater side of the rainwater guide body B1 becomes stepped in accordance with the shape of the upper side attachment portion 13 of the intermediate gutter 1

[0071] [see Fig. 6(3), Fig. 8(D), (D-1)]. The guide plate materials 7, 7, … are installed in such a manner. Specifically, when a plurality of sets are arranged in the roof width direction as a set, the underwater ends of the guide plate materials 7 of each set are arranged to be stepped and shifted along the upper water attachment part 13 of the intermediate gutter 1 (see FIGS. 8(B) and (B1)).

[0072] Next, it is installed so that the lower end (underwater end part) of the upper metal plate roof A1 overlaps above the upper end part (upper water end part) of the rainwater guide body B1 (see FIGS. 6(4), 8(D), and (D1)). Specifically, the upper roof plate material 5 constituting the upper metal plate roof A1 and the guide plate material 7 constituting the rainwater guide body B1 are connected so that the gable parts 51 and 61 overlap. At this time, at the connection part, the upper roof plate material 5 is overlapped so as to be above the guide plate material 7. The overlapping connection part of the upper roof plate material 5 and the guide plate material 7 is installed on the through base material 91 (see FIG. 6(5)). The lower end of the upper metal plate roof A1 and the upper end of the lower metal plate roof A2 facing in the roof inclination direction (Y direction) are placed in a direction obliquely crossing in the width direction of the metal plate roof A. And it is configured to cover the upper surface of the gap part S in the obliquely crossing direction with the rainwater guide B having the same cross-sectional shape as the upper metal plate roof A1. That is, a gap part S along the width direction (X direction) is formed between the lower end (underwater end part) of the upper metal plate roof A1 and the upper end (upper water end part) of the already installed lower metal plate roof A2 (see FIGS. 1, 6(4), 13(A), and (A1)). The gap part S is a space region formed between the underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2, and the gap part S will be covered by the rainwater guide body B1.

[0073] The underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2 facing in the roof inclination direction (Y direction) are placed in a direction obliquely crossing in the width direction of the metal plate roof A. And it is configured to cover the upper surface of the gap part S in the obliquely crossing direction with the rainwater guide B having the same cross-sectional shape as the upper metal plate roof A1. That is, a gap part S along the width direction (X direction) is formed between the lower end (underwater end part) of the upper metal plate roof A1 and the upper end (upper water end part) of the already installed lower metal plate roof A2 (see FIGS. 1, 6(4), 13(A), and (A1)). The gap part S is a space region formed between the underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2, and the gap part S will be covered by the rainwater guide body B1. The underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2 facing in the roof inclination direction (Y direction) are placed in a direction obliquely crossing in the width direction of the metal plate roof A. And it is configured to cover the upper surface of the gap part S in the obliquely crossing direction with the rainwater guide B having the same cross-sectional shape as the upper metal plate roof A1. That is, a gap part S along the width direction (X direction) is formed between the lower end (underwater end part) of the upper metal plate roof A1 and the upper end (upper water end part) of the already installed lower metal plate roof A2 (see FIGS. 1, 6(4), 13(A), and (A1)). The gap part S is a space region formed between the underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2, and the gap part S will be covered by the rainwater guide body B1. And it is configured to cover the upper surface of the gap part S in the obliquely crossing direction with the rainwater guide B having the same cross-sectional shape as the upper metal plate roof A1. That is, a gap part S along the width direction (X direction) is formed between the lower end (underwater end part) of the upper metal plate roof A1 and the upper end (upper water end part) of the already installed lower metal plate roof A2 (see FIGS. 1, 6(4), 13(A), and (A1)). The gap part S is a space region formed between the underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2, and the gap part S will be covered by the rainwater guide body B1. The underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2 facing in the roof inclination direction (Y direction) are placed in a direction obliquely crossing in the width direction of the metal plate roof A. And it is configured to cover the upper surface of the gap part S in the obliquely crossing direction with the rainwater guide B having the same cross-sectional shape as the upper metal plate roof A1. That is, a gap part S along the width direction (X direction) is formed between the lower end (underwater end part) of the upper metal plate roof A1 and the upper end (upper water end part) of the already installed lower metal plate roof A2 (see FIGS. 1, 6(4), 13(A), and (A1)). The gap part S is a space region formed between the underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2, and the gap part S will be covered by the rainwater guide body B1. The underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2 facing in the roof inclination direction (Y direction) are placed in a direction obliquely crossing in the width direction of the metal plate roof A. And it is configured to cover the upper surface of the gap part S in the obliquely crossing direction with the rainwater guide B having the same cross-sectional shape as the upper metal plate roof A1. That is, a gap part S along the width direction (X direction) is formed between the lower end (underwater end part) of the upper metal plate roof A1 and the upper end (upper water end part) of the already installed lower metal plate roof A2 (see FIGS. 1, 6(4), 13(A), and (A1)). The gap part S is a space region formed between the underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2, and the gap part S will be covered by the rainwater guide body B1. The underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2 facing in the roof inclination direction (Y direction) are placed in a direction obliquely crossing in the width direction of the metal plate roof A. And it is configured to cover the upper surface of the gap part S in the obliquely crossing direction with the rainwater guide B having the same cross-sectional shape as the upper metal plate roof A1. That is, a gap part S along the width direction (X direction) is formed between the lower end (underwater end part) of the upper metal plate roof A1 and the upper end (upper water end part) of the already installed lower metal plate roof A2 (see FIGS. 1, 6(4), 13(A), and (A1)). The gap part S is a space region formed between the underwater end of the upper metal plate roof A1 and the upper water end of the lower metal plate roof A2, and the gap part S will be covered by the rainwater guide body B1.

[0074] Next, above the lower metal plate roof A2 and at the lower end part (underwater end part) of the rainwater guide B The intermediate gutter 1 is placed at the position where it is to be and fixed by the gutter fixing material 4, and the construction is completed [Fig. 6( 5),(6), Fig. 8(E),(E-1) refer]. Here, the underwater side of the upper metal plate roof A1 is arranged to be stepped in accordance with the displacement of the guide plate material 7 of the rainwater guide body B1 [Fig. 8(E),(E-1) refer].

[0075] Summarizing the configurations of the upper metal plate roof A1, the lower metal plate roof A2, and the gap part S described above, the lower end part of the underwater side of the upper metal plate roof A1 and the upper end part of the underwater side of the lower metal plate roof A2 facing in the roof inclination direction (Y direction) are installed in a direction obliquely crossing in the width direction (X direction) of the metal plate roof A, and are configured to cover the upper surface of the gap part S with the rainwater guide B having the same cross-sectional shape as the upper metal plate roof A1. The inclination degree of the rainwater guide B is formed to be less inclined than the inclination angle of the upper metal plate roof A1.

[0076] Next, a second embodiment of the present invention will be described. In the second embodiment, the upper metal plate roof A1 and the rain water guide B are integrally configured (refer to Figs. 10 to 12). The rainwater guide B in this second embodiment is such that the lower side (underwater side) part of the upper metal plate roof A1 is the rainwater guide part B2.

[0077] That is, the upper side region of one metal plate roof plate is used as the upper roof plate material 5 of the upper metal plate roof A1 and the lower side region is used as the guide plate material 7 of the rainwater guide part B2 to be. As a result, the upper metal plate roof A1 and the rainwater guide part B2 are integrated into one roof structure. In the second embodiment, due to the structure in which the upper metal plate roof A1 and the rainwater guide part B2 are integrated, a gap part S is assumed to exist between the lower end part of the underwater side of the part of the upper metal plate roof A1 and the upper end part of the underwater side of the lower metal plate roof A2.

[0078] Then, in the second embodiment, the gap portion S is where the rainwater guide portion B2 is to be arranged. The underwater side portion of the rainwater guide portion B2 in the second embodiment will form a gently sloping portion 7k by the gutter base member 2 in the same manner as in the first embodiment. The portion of the rainwater guide portion B2 having a structure integrated with the upper side metal plate roof A1 is configured to cover the upper part of the gap portion S (see FIGS. 11 and 12). Also in the second embodiment, there are an embodiment (see FIG. 11) in which a zigzag portion 73 is provided in the rainwater guide portion B2 to form a gently sloping portion 7k, and an embodiment (see FIG. 12) in which the gently sloping portion 7k is formed by warping the rainwater guide portion B2. The structure of the zigzag portion 73 is the same as that in the first embodiment. Please refer to the description of the zigzag portion 73 in the first embodiment. Also, the formation of the gently sloping portion 7k due to the warp of the rainwater guide portion B2 is the same as that in the first embodiment. Please refer to the description of the warp in the first embodiment.

[0079] In the second embodiment, except that the rainwater guide B is taken as the rainwater guide portion B2 and the upper side metal plate roof A1 and the rainwater guide portion B2 are integrated, it is the same as the first embodiment, and the gutter base member 2, the mountain-shaped reinforcing material 3, etc. are also used in the same manner. For the structure, please refer to the description in the first embodiment. The construction process of the second embodiment described below is also substantially the same as the construction process in the first embodiment.

[0080] FIGS. 10(1) to (5) are process diagrams showing the construction process of the second embodiment of the present invention. Regarding the construction process in this second embodiment, steps (1) and (2) are the same as steps (1) and (2) of the construction process in the first embodiment. For the steps up to here, please refer to the construction process in the first embodiment.

[0081] Next, place and fix the gutter base member 2 on the upper end portion (upper side end portion) of the underwater side metal plate roof A2 (Refer to Fig. 10(3)), and then install the integrated upper water-side metal plate roof A1 and the rainwater guide part B2 (Refer to Fig. 10(3)). Next, the intermediate gutter 1 is placed at a position above the lower water-side metal plate roof A2 and at the lower end part (lower water-side end part) of the rainwater guide part B2, and is fixed by the gutter fixing material 4 to complete the construction (Refer to Figs. 10(4) and (5)).

[0082] The continuous base material 91 is formed from a thin metal plate material and is a member that is long along its longitudinal direction (X direction), and is mainly composed of a roof plate receiving part 91a, a locked part 91b, and a flat part 91c. The roof plate receiving part 91a bulges upward in a substantially trapezoidal portal shape in cross-section and serves as a purlin-like part that supports the upper water-side roof plate material 5 and the lower water-side roof plate material 6.

[0083] The flat part 91c is continuously formed horizontally from one lower end of the roof plate receiving part 91a, and the locked part 91b is formed horizontally from the other lower end. The locked part 91b is locked by the fixture 92 and fixed to the top of the existing roof C. The fixture 92 is attached onto the existing roof C via a hook bolt or the like to a steel material such as a C-shaped steel that supports the slate roof of the existing roof C.

[0084] Next, Fig. 14 shows a modification of the first embodiment of the present invention. There is also an embodiment in which the intermediate gutter 1 is placed such that the rainwater receiving rising part 11 and the upper water-side attachment part 13 are linear inclinations, and the inclination angle is θ along the width direction (X direction) of the lower water-side metal plate roof A2, and the lower end of the roof plate material 5 constituting the upper water-side metal plate roof A1 is the inclined side with the inclination angle θ (Refer to Fig. 14). In this embodiment, the intermediate gutter 1 used is another embodiment of the intermediate gutter 1 described above, in which the rainwater receiving rising part 11 and the upper water-side attachment part 13 are linear and parallel.

[0085] Further, FIG. 15 shows another modification of the first embodiment of the present invention. In the intermediate gutter 1, the rainwater receiving rising portion 11 and the upper water side mounting portion 13 are formed in an inclined straight line shape with the same inclination angle θ and are parallel to each other. The lower ends of the upper water side metal plate roof A1 and the rainwater guide body B1 may also be formed in an inclined straight line shape with an inclination angle θ (see FIG. 15). Also in this embodiment, the intermediate gutter 1 used is another embodiment of the intermediate gutter 1 described above, in which the rainwater receiving rising portion 11 and the upper water side mounting portion 13 are linear and parallel to each other.

[0086] It is provided up to the side end of the metal plate roof A of the intermediate gutter 1. Along the longitudinal direction (X direction) of the intermediate gutter 1, the lower end in the inclined direction protrudes from the end in the width direction (X direction) of the lower water side metal plate roof A2 of the metal plate roof A. And at the end of this intermediate gutter 1, at the part protruding from the lower water side metal plate roof A2, a rainwater discharge pipe 14 is provided at the bottom 12 of the part, and a discharge port 14a of the rainwater discharge pipe 14 is provided at the bottom 12 (see FIGS. 8(F), (F1)). Here, the continuous base material 91 will be directly fixed to the structural material such as the main frame of the existing roof C by the fixture 92.

[0087] Although the roof drainage structure in the present invention is premised on being provided on a renovated roof obtained by renovating an existing roof, it is also fully possible to apply the roof drainage structure in the present invention to a newly constructed roof.

Explanation of Reference Numerals

[0088] A... Metal plate roof, A1... Upper water side metal plate roof, 5... Upper water side roof board 5, A2... Lower water side metal plate roof, 6... Lower water side roof board, B... Rainwater guide, B1... Rainwater guide body, B2... Rainwater guide portion, 7... Guide board, S... Gap portion, C... Existing roof, 1... Intermediate gutter, 11... Rainwater receiving rising portion, 11t... Step portion, 12... Bottom, 13... Upper water side mounting portion, 13t... Step portion, 73... Zigzag portion.​​

Claims

1. A metal plate roof composed of an upper-side metal plate roof with a waveform and a lower-side metal plate roof having the same shape as the upper-side metal plate roof and provided with a gap portion at a predetermined interval in the roof inclination direction is covered on an existing roof, and in a roof provided with an eaves gutter or a valley gutter, The lower-side end of the upper-side metal plate roof and the upper-side end of the lower-side metal plate roof facing each other in the roof inclination direction are placed in a direction obliquely crossing the width direction of the metal plate roof, and a rainwater guide having the same cross-sectional shape as the upper-side metal plate roof is configured to cover the upper surface of the gap portion in the obliquely crossing direction described above. The inclination degree of the rainwater guide is formed to be gentler than the inclination angle of the upper-side metal plate roof. An intermediate gutter with a deformed U-shaped cross-section formed by a rainwater receiving rising portion, a bottom portion, and an upper-side mounting portion is placed inclined in the width direction of the lower-side metal plate roof with the rainwater receiving rising portion as the lower side of the roof. The terminal at the lower position in the inclination direction of the intermediate gutter is provided up to the side end of the metal plate roof. A mountain-shaped reinforcing member facing the roof inclination direction of the lower-side metal plate roof is fixed to the lower-side metal plate roof at a predetermined interval in the width direction of the lower-side metal plate roof. The lower end of the rainwater guide closer to the lower end is placed on the upper-side mounting portion of the intermediate gutter and fixed to a gutter base member provided in the width direction of the lower-side metal plate roof fixed to the lower-side metal plate roof. The gutter base member is also fixed to the mountain-shaped reinforcing member. The lower end of the gutter fixing member that supports the rainwater receiving rising portion of the intermediate gutter from the outside is fixed on the lower-side metal plate roof and to the mountain-shaped reinforcing member. The drainage structure of the roof is characterized in that the rainwater flowing from the rainwater guide into the intermediate gutter is configured to be drained from the terminal of the intermediate gutter.

2. In the drainage structure of the roof according to Claim 1, the rainwater guide is composed of a rainwater guide body, and the upper end portion of the rainwater guide is attached in a superposed state below the lower end portion of the upper-side metal plate roof.

3. In the drainage structure of the roof according to Claim 2, the gentle inclination portion of the rainwater guide body is formed via a zigzag portion formed by irregularities.

4. In the roof drainage structure according to claim 2, the gently sloping portion of the rainwater guide body is formed by curving it so that the underwater side of the rainwater guide body faces upward. A roof drainage structure characterized by this.

5. In the roof drainage structure according to claim 1, the upper water-side metal plate roof has a structure in which its lower end is integrated with the rainwater guide portion that is the rainwater guide. A roof drainage structure characterized by this.

6. In the roof drainage structure according to claim 5, the gently sloping portion of the rainwater guide portion is formed via a zigzag portion formed by unevenness. A roof drainage structure characterized by this.

7. In the roof drainage structure according to claim 5, the gently sloping portion of the rainwater guide portion is formed by curving it so that the underwater side of the rainwater guide portion faces upward. A roof drainage structure characterized by this.

8. In the roof drainage structure according to claim 1 or 2, the intermediate gutter has stepped portions formed along the longitudinal direction in the rainwater receiving rising portion and the upper water-side mounting portion, and the longitudinal direction of the intermediate gutter is inclined stepwise via the stepped portions. A roof drainage structure characterized by this.

9. In the roof drainage structure according to claim 7, the rainwater receiving rising portion and the upper water-side mounting portion of the intermediate gutter are linear and parallel. A roof drainage structure characterized by this.

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