Eaves gutter, support, and eaves gutter support structure

Abstract

To provide: an eaves gutter that can reduce occurrence of drainage performance deterioration and overflow; a bracket that can reduce deformation of the eaves gutter; and an eaves gutter support structure which can reduce occurrence of drainage performance deterioration and overflow, and further can reduce deformation of the eaves gutter.SOLUTION: An eaves gutter 2 comprises a bottom wall 20, and first and second sidewalls 21, 22 which extend upwards from respective sides in the width direction of the bottom wall 20. When it is assumed that the length of a first straight line S1 connecting a top edge 21a and a bottom edge 21b of the first sidewall 21 is L1, the angle between the thickness direction of the bottom wall 20 and the first straight line S1 is θ1, the height of the first sidewall 21 is H1, the length of a second straight line S2 connecting a top edge 22a and a bottom edge 22b of the second sidewall 22 is L2, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 is θ2, the height of the second sidewall 22 is H2, and the width of the bottom wall 20 is W, H1=L1cosθ1, H2=L2cosθ2, |θ1|≤10°, |θ2|≤10°, H1≥H2, W≥200 mm, and H2≥200 mm are satisfied.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to an eaves gutter, a receiving device, and an eaves gutter support structure. [Background technology]

[0002] Patent Document 1 discloses an eaves gutter and an eaves gutter hanger. In Patent Document 1, ears are provided on both upper ends of the eaves gutter. The eaves gutter hanger has roughly U-shaped ear support parts at both ends of the eaves gutter hanger body for fitting and supporting the ears of the eaves gutter, and the eaves gutter hanger body is provided with an elastic anti-detachment piece whose tip faces the inner side of the eaves gutter ear whose tip fits into the ear support parts. An L-shaped bent piece is provided by bending the tip of the anti-detachment piece upward into an L shape. A protrusion is provided at one corner of the L-shaped bent piece, protruding toward the ear support part side. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-108480 A Summary of the Invention [Problem to be solved by the invention]

[0004] In an eaves gutter such as that described in Patent Document 1, there is a demand for reducing the deterioration of drainage performance and the occurrence of overflow. In a component for attaching an eaves gutter to a building, such as the eaves gutter hanger described in Patent Document 1, there is a demand for reducing deformation of the eaves gutter.

[0005] The present disclosure provides an eaves gutter that can reduce the deterioration of drainage performance and the occurrence of overflow.The present disclosure provides a support that can reduce deformation of the eaves gutter that can reduce the deterioration of drainage performance and the occurrence of overflow.The present disclosure provides an eaves gutter support structure that can reduce the deterioration of drainage performance and the occurrence of overflow, and further reduce deformation of the eaves gutter. [Means for solving the problem]

[0006] The eaves gutter according to one aspect of the present disclosure includes a bottom wall and first and second side walls extending upward from both sides of the bottom wall in the width direction. If the length of a first straight line connecting the upper end and lower end of the first side wall is L1, the angle between the thickness direction of the bottom wall and the first straight line is θ1, the height of the first side wall is H1, the length of a second straight line connecting the upper end and lower end of the second side wall is L2, the angle between the thickness direction of the bottom wall and the second straight line is θ2, the height of the second side wall is H2, and the width of the bottom wall is W, the following relationships are satisfied: H1=L1cosθ1, H2=L2cosθ2, |θ1|≦10°, |θ2|≦10°, H1≧H2, W≧200mm, and H2≧200mm.

[0007] A receiving device according to another aspect of the present disclosure is a receiving device for supporting the above-mentioned eaves gutter, the eaves gutter being located at at least one of the upper end of the first side wall and the upper end of the second side wall and including a protruding portion protruding to at least one of the outer side and inner side of the eaves gutter. The receiving device includes a support portion extending in the width direction of the bottom wall of the eaves gutter and supporting the underside of the bottom wall, first and second arms extending upward from both sides of the support portion, and a connecting portion located at least on one of the first arm and second arm and connecting to the protruding portion of the eaves gutter from above.

[0008] An eaves gutter support structure according to yet another aspect of the present disclosure comprises the above-mentioned eaves gutter and a receiving device that supports the eaves gutter. The eaves gutter is located at at least one of the upper ends of the first side wall and the second side wall and has a protruding portion that protrudes to at least one of the outside and inside of the eaves gutter. The receiving device comprises a support portion that extends in the width direction of the bottom wall of the eaves gutter and supports the underside of the bottom wall, first and second arms that extend upward from both sides of the support portion, and a connecting portion that is located at at least one of the first arm and the second arm and connects to the protruding portion of the eaves gutter from above. Effect of the Invention

[0009] One aspect of the present disclosure can reduce the deterioration of drainage performance and the occurrence of overflow. Another aspect of the present disclosure can reduce deformation of the eaves gutter, which can reduce the deterioration of drainage performance and the occurrence of overflow. Yet another aspect of the present disclosure can reduce the deterioration of drainage performance and the occurrence of overflow, and further reduce deformation of the eaves gutter. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic diagram of a configuration example of a rain gutter system according to a first embodiment; [Diagram 2] Top view of an example of the configuration of the eaves gutter support structure of the gutter system in Figure 1 [Diagram 3] FIG. 3 is a partial perspective view of the eaves gutter support structure of FIG. [Figure 4] Cross-section of the eaves gutter support structure in Figure 2 [Diagram 5] Cross-section of the eaves gutter of the eaves gutter support structure in Figure 2 [Figure 6] Cross-sectional view of the support for the eaves gutter in Figure 2 [Figure 7] Partially enlarged view of the receiving tool in FIG. [Figure 8] A cross-sectional view of a configuration example of an eaves gutter support structure according to a second embodiment. [Figure 9] Cross-section of the eaves gutter of the eaves gutter support structure of Figure 8 [Figure 10] A cross-sectional view of a configuration example of an eaves gutter support structure according to a third embodiment. [Figure 11] A cross-sectional view of a configuration example of an eaves gutter support structure according to a fourth embodiment. [Figure 12] Partially enlarged view of the receiving tool in FIG. [Figure 13] A cross-sectional view of a configuration example of an eaves gutter support structure according to a fifth embodiment. [Figure 14] FIG. 14 is an explanatory diagram of an example of the operation of the eaves gutter support structure of FIG. 13; [Figure 15] A cross-sectional view of a configuration example of an eaves gutter support structure according to a sixth embodiment. [Figure 16] Cross-section of the eaves gutter of the eaves gutter support structure of Figure 15 [Figure 17] A cross-sectional view of a configuration example of an eaves gutter support structure according to a seventh embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] [1. Embodiment] Hereinafter, the embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed explanation than necessary may be omitted. For example, detailed explanation of already well-known matters or duplicate explanation of substantially the same configuration may be omitted. This is to avoid the following explanation becoming unnecessarily redundant and to facilitate understanding by those skilled in the art. Note that the inventor(s) provide the attached drawings and the following explanation so that those skilled in the art can fully understand the present disclosure, and do not intend for them to limit the subject matter described in the claims.

[0012] Unless otherwise specified, the positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings. Each figure described in the following embodiments is a schematic diagram, and the ratio of the size and thickness of each component in each figure does not necessarily reflect the actual dimensional ratio. Furthermore, the dimensional ratio of each element is not limited to the ratio shown in the drawings.

[0013] [1.1 First embodiment] [1.1.1 Configuration] FIG. 1 is a schematic diagram of a configuration example of a gutter system 1 according to a first embodiment. The gutter system 1 is a type of piping system. The gutter system 1 receives rainwater from a roof 10a of a building 10 and drains it into a manhole 12 on the ground 11. The rainwater collected in the manhole 12 flows out from the manhole 12 to a storm drain through a buried pipe 13. The building 10 is, for example, a non-residential facility such as a store, an office, a factory, a building, a school, a welfare facility, or a hospital, and a residential facility such as a detached house, an apartment building, or each dwelling unit of a detached house or an apartment building. The non-residential facility also includes a theater, a movie theater, a public hall, an amusement park, a complex, a department store, a hotel, an inn, a kindergarten, a library, a museum, an art museum, an underground shopping mall, a station, an airport, and the like.

[0014] The gutter system 1 in FIG. 1 includes an eaves gutter support structure 4, a drain 5, and a drainage section 6.

[0015] Fig. 2 is a top view of a configuration example of the eaves gutter support structure 4 of the rain gutter system 1. Fig. 3 is a partial perspective view of the eaves gutter support structure 4. Fig. 4 is a cross-sectional view of the eaves gutter support structure 4.

[0016] As shown in Fig. 2 to Fig. 4, the eaves gutter support structure 4 includes an eaves gutter 2 and a receiving device 3. The eaves gutter support structure 4 of Fig. 2 includes a plurality of receiving devices 3. The number and positions of the receiving devices 3 may be appropriately set according to the shape of the building 10, etc.

[0017] The eaves gutter 2 receives rainwater from the roof 10a of the building 10. The eaves gutter 2 in FIG. 2 is installed at the eaves edge of the roof 10a of the building 10. In particular, the eaves gutter 2 is disposed so as to extend along the eaves edge of the roof 10a of the building 10.

[0018] 2, 3 and 4, the eaves gutter 2 includes a bottom wall 20, a first side wall 21, a second side wall 22, and a protruding portion 23. The first side wall 21 and the second side wall 22 are also called standing walls.

[0019] The bottom wall 20 is in the form of a plate having a length, width and thickness. The bottom wall 20 in Fig. 2 is in the form of a rectangular plate. In the longitudinal direction of the bottom wall 20, the width and thickness of the bottom wall 20 are approximately constant. In the bottom wall 20, a drop opening 20a is formed in accordance with the overall design of the gutter system 1.

[0020] The first side wall 21 and the second side wall 22 extend upward from both sides in the width direction of the bottom wall 20. In particular, the second side wall 22 extends upward from the end of the bottom wall 20 on the building 10 side in the width direction, and the first side wall 21 extends upward from the end of the bottom wall 20 on the opposite side to the building 10 in the width direction. The first side wall 21 and the second side wall 22 are plate-shaped having a length, width and thickness. The first side wall 21 and the second side wall 22 are rectangular plate-shaped. In the length direction of the first side wall 21, the width and thickness of the first side wall 21 are approximately constant. In the length direction of the second side wall 22, the width and thickness of the second side wall 22 are approximately constant.

[0021] The protruding portion 23 is located at the upper end 21a of the first side wall 21 and protrudes to the inside of the eaves gutter 2. The inside of the eaves gutter 2 is the direction from both sides in the width direction of the bottom wall 20 toward the center in the width direction of the bottom wall 20. The protruding portion 23 in FIG. 5 includes a first piece 231 extending from the upper end 21a of the first side wall 21 to the inside of the eaves gutter 2, a second piece 232 extending from the tip of the first piece 231 to the bottom wall 20 side of the eaves gutter 2, and a third piece 233 extending from the tip of the second piece 232 to the first side wall 21 side of the eaves gutter 2. In a plane perpendicular to the length direction of the bottom wall 20 of the eaves gutter 2, the protruding portion 23 is approximately U-shaped.

[0022] In this embodiment, the bottom wall 20, the first side wall 21, the second side wall 22, and the protruding portion 23 are integrally formed. The bottom wall 20, the first side wall 21, the second side wall 22, and the protruding portion 23 constitute the eaves gutter member 2a. The eaves gutter member 2a, i.e., the bottom wall 20, the first side wall 21, the second side wall 22, and the protruding portion 23, are formed, for example, by extrusion molding of a resin material. The eaves gutter member 2a may include a core material for reinforcing the strength of the entire eaves gutter 2. The core material may be made of, for example, a metal.

[0023] In this embodiment, the eaves gutter 2 is transported to the site in a predetermined shape formed by extrusion molding of a resin material. Unlike forming an eaves gutter from a metal plate, for example, a steel plate (also called a coil), no on-site processing is required. Specifically, since there is no need to perform processes such as cutting the coil, bending the coil, applying a sealant to seal joints, etc., and curing on-site, there is no problem of an increase in on-site work man-hours, and the construction of the gutter system 1 can be easily performed.

[0024] The eaves gutter 2 in Fig. 2 includes end members 2b and 2c in addition to the eaves gutter member 2a. The end members 2b and 2c are fixed to both longitudinal sides of the bottom wall 20 of the eaves gutter member 2a. The end members 2b and 2c are plate-shaped and cover the openings on both longitudinal sides of the bottom wall 20 of the eaves gutter member 2a. The eaves gutter 2 in Fig. 2 includes three members, the eaves gutter member 2a and the end members 2b and 2c, and the eaves gutter member 2a includes a bottom wall 20, a first side wall 21, a second side wall 22, and a protrusion 23.

[0025] FIG. 5 is a cross-sectional view of the eaves gutter 2. In the eaves gutter 2 of FIG. 5, let the length of the first straight line S1 connecting the upper end 21a and the lower end 21b of the first side wall 21 be L1, the angle between the thickness direction of the bottom wall 20 and the first straight line S1 be θ1, and the height of the first side wall 21 be H1. The eaves gutter 2 satisfies H1 = L1cosθ1. In the eaves gutter 2 of FIG. 5, the length L1 of the straight line S1 is equal to the width of the first side wall 21.

[0026] In the eaves gutter 2 of FIG. 5, let the length of the second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22 be L2, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 be θ2, and the height of the second side wall 22 be H2. The eaves gutter 2 satisfies H2 = L2cosθ2. In the eaves gutter 2 of FIG. 5, the length L2 of the straight line S2 is equal to the width of the second side wall 22.

[0027] The eaves gutter 2 of FIG. 5 satisfies |θ1| ≤ 10°. For θ1, the direction in which the upper end 21a of the first side wall 21 moves away from the upper end 22a of the second side wall 22 (counterclockwise direction in FIG. 5) is defined as the positive direction. The eaves gutter 2 preferably satisfies θ1 ≥ 0°.

[0028] The eaves gutter 2 of FIG. 5 satisfies |θ2| ≤ 10°. For θ2, the direction in which the upper end 22a of the second side wall 22 moves away from the upper end 21a of the first side wall 21 (clockwise direction in FIG. 5) is defined as the positive direction. The eaves gutter 2 preferably satisfies θ2 ≥ 0°.

[0029] In the present embodiment, the first side wall 21 is on the side opposite to the building 10 with respect to the second side wall 22. When H1 < H2, the rainwater accumulated in the eaves gutter 2 is likely to leak to the side opposite to the building 10. From the above, the eaves gutter 2 of FIG. 5 satisfies H1 ≥ H2. That is, the eaves gutter 2 satisfies L1cosθ1 ≥ L2cosθ2. In particular, in the eaves gutter 2 of FIG. 5, H1 > H2.

[0030] In the eaves gutter 2, local water level drops are likely to occur in the regions R1 on both sides of the drain opening 20a in the width direction of the bottom wall 20. The region R1 is in the shape of a right triangle. The narrower the region R1, the greater the influence of the local water level drop is likely to be. In the eaves gutter 2, when the water level drops and the drain 5 is exposed from the water surface, air can flow in from the drain 5. The inflow of air from the drain 5 contributes to a decrease in the drainage efficiency due to the siphon phenomenon. Such a tendency is considered to be more prominent as the flow rate is larger. However, with the sizes of the conventionally proposed eaves gutters, the reduction in drainage performance was not sufficient.

[0031] According to the standard of the rigid polyvinyl chloride pipe (general) in JIS K 6741 "Rigid Polyvinyl Chloride Pipes", the inner diameter of a VU pipe with a nominal diameter of 125 is approximately 131 mm. In this case, the inner diameter d of the drain opening 20a shown in Fig. 2 is also set to 131 mm. When the center of the drain opening 20a coincides with the center in the width direction of the bottom wall 20, there is a margin of distance X on both sides of the drain opening 20a. The larger the distance X, the larger the region R1, so the influence of the local water level drop can be reduced. Here, the inner diameter d of the drain opening 20a, the distance X, and the shortest distance W1 between the first and second side walls 21, 22 satisfy the relationship W1 = d + 2X. When using a VU pipe with a nominal diameter of 125, from the perspective of ensuring sufficient margin, the eaves gutter 2 in Fig. 5 is preferably set to satisfy W1 ≥ 200 mm. Usually, the thicknesses of the bottom wall 20, the first side wall 21, and the second side wall 22 of the eaves gutter 2 are about several millimeters, and the shortest distance W1 between the first and second side walls 21, 22 can be considered to be substantially equal to the width W of the bottom wall 20. Therefore, the eaves gutter 2 in Fig. 5 is preferably set to satisfy W1 ≥ 200 mm. Thereby, even during high flow rates, the inflow of air into the drain 5 can be suppressed, and the reduction in drainage performance can be inhibited.

[0032] It is preferable that the eaves gutter 2 has a capacity that prevents rainwater from overflowing until the siphon phenomenon occurs. However, the size of the eaves gutter proposed in the past was not sufficient to reduce overflow. In the eaves gutter 2 of this embodiment, as described above, W ≧ 200 mm is set to reduce drainage performance. From the viewpoint of preventing overflow, the case of W = 200 mm is considered. It is known that the siphon phenomenon does not occur instantly in the eaves gutter 2, and it takes a certain amount of time before the siphon phenomenon occurs. And, when the amount of rain is 160 mm / h, if there is no overflow until 16 seconds have passed since the rain fell, considering the time it takes for the siphon phenomenon to occur, it has been found that the rainwater can be drained without overflowing due to the occurrence of the siphon phenomenon. Therefore, from this viewpoint, it is preferable that the eaves gutter 2 in FIG. 5 satisfies H2 ≧ 200 mm. This makes it possible to ensure a sufficiently safe height of the eaves gutter 2 taking into account the lead time until the siphon phenomenon occurs.

[0033] From the viewpoint of ensuring a sufficient margin, it is preferable that the eaves gutter 2 satisfies W≧240 mm. It is more preferable that the eaves gutter 2 satisfies W≧350 mm.

[0034] Since the eaves gutter 2 is relatively thin, if W becomes too large, it may become difficult to maintain the shape of the eaves gutter 2 itself. From this point of view, it is preferable that the eaves gutter 2 satisfies W≦450 mm. It is more preferable that the eaves gutter 2 satisfies W≦400 mm.

[0035] In the eaves gutter 2, when W is large, the moment of force applied to the receiving device 3 by the first side wall 21 increases. When the moment of force applied to the receiving device 3 increases, the required strength of the receiving device 3 may increase. Therefore, W should not be too large. When W is larger than H2, the eaves gutter 2 becomes flat as a whole. If the eaves gutter 2 has a flat shape, there is an increased possibility that rainwater that falls into the eaves gutter 2 from the roof 10a will hit the bottom wall 20, bounce, and escape from the eaves gutter 2 to the outside. In other words, the eaves gutter 2 may not easily receive rainwater from the roof 10a. In addition, the area of ​​the bottom wall 20 (the bottom area of ​​the eaves gutter 2) increases, making it more susceptible to the effects of wind, etc. From the above, in terms of the relationship between H2 and W, it is preferable that the eaves gutter 2 satisfies H2 / W≧0.5. In particular, it is more preferable that the eaves gutter 2 satisfies H2 / W≧2 / 3.

[0036] In the eaves gutter 2, if H2 becomes large, the eaves gutter 2 will have an overall vertically elongated shape. If the eaves gutter 2 has a vertically elongated shape, the vertical dimension of the eaves gutter 2 will be too large compared to the thickness of the roof 10a. For the above reasons, it is preferable that the eaves gutter 2 satisfy H2 / W≦2.5.

[0037] The receiving fixture 3 supports the eaves gutter 2. The receiving fixture 3 is used to install the eaves gutter 2 at the eaves edge of the roof 10a of the building 10.

[0038] 6 is a cross-sectional view of the receiver 3. The receiver 3 includes a support portion 30, first and second arm portions 31, 32, a joining portion 33, a connecting portion , and a fixing portion .

[0039] 4, the support portion 30 extends in the width direction of the bottom wall 20 of the eaves gutter 2 and supports the lower surface of the bottom wall 20. The support portion 30 is in the shape of a plate having a length, width and thickness.

[0040] The fixing portion 35 extends downward from a first end in the length direction of the support portion 30. The fixing portion 35 is a plate-like member having a length, width and thickness. In Fig. 6, the fixing portion 35 is integrally formed with the support portion 30 so as to extend downward from the first end in the length direction of the support portion 30.

[0041] The first arm 31 and the second arm 32 extend upward from both sides of the support part 30. Each of the first arm 31 and the second arm 32 is plate-shaped and has a length, width and thickness. The first arm 31 is connected to the support part 30 by a fixing part 35. The first arm 31 is fixed to the support part 30 by connecting a lower end portion of the first arm 31 to the fixing part 35 with a screw 3c. The second arm 32 is formed integrally with the support part 30 so as to extend upward from a second end of the support part 30 in the longitudinal direction.

[0042] As shown in FIG. 4, the first arm 31 corresponds to the first side wall 21 of the eaves gutter 2. The first arm 31 has a shape extending along the outer surface of the first side wall 21 of the eaves gutter 2. The outer surface of the first side wall 21 is the surface of the first side wall 21 opposite to the second side wall 22. As shown in FIG. 4, the second arm 32 corresponds to the second side wall 22 of the eaves gutter 2. The second arm 32 has a shape extending along the outer surface of the second side wall 22 of the eaves gutter 2. The outer surface of the second side wall 22 is the surface of the second side wall 22 opposite to the first side wall 21.

[0043] The connecting portion 33 is located on the first arm 31. The connecting portion 33 is configured to connect to the protruding portion 23 of the eaves gutter 2 from above (see FIG. 4). The connecting portion 33 in FIG. 6 comprises a first piece 331 extending from the first arm 31 toward the second arm 32, and a second piece 332 extending from the tip of the first piece 331 toward the support portion 30. The connecting portion 33 forms a recess 333 between the first arm 31 and the first piece 331 and the second piece 332. As shown in FIG. 4, the recess 333 is sized to fit the protruding portion 23 of the eaves gutter 2.

[0044] The dimensions of the connecting part 33 can be set so that the protruding part 23 does not come off from the connecting part 33, that is, so that the protruding part 23 does not come out of the recess 333 of the connecting part 33, during normal use of the rain gutter system 1. In the installation environment of the rain gutter system 1, the eaves gutter 2 may sway due to the wind. In such a case, it is desirable that the protruding part 23 does not come off from the connecting part 33.

[0045] The dimensions of the joint 33 can be set, for example, taking into consideration g1 and g2 in FIG. 4. g1 in FIG. 4 is the dimension (vertical dimension) of the space between the protrusion 23 and the first piece 331 of the joint 33. g2 in FIG. 4 is the dimension (vertical dimension) of the area where the protrusion 23 and the second piece 332 of the joint 33 overlap. As an example, g1 may be 1 mm or less. g2 may be g2≧2×g1. By setting in this way, even if the eaves gutter 2 is bent by wind or the like, the protrusion 23 of the eaves gutter 2 is unlikely to come off the joint 33. Note that the above values ​​of g1 and g2 are merely examples. The dimensions of the joint 33 may be set so that the joint 33 is joined to the protrusion 23 and does not come off due to wind or the like. By appropriately setting g1 and g2, the ease of joining the joint 33 to the protrusion 23 can be appropriately set.

[0046] Because the protruding portion 23 is connected to the connecting portion 33, the first side wall 21 of the eaves gutter 2 can be supported by the receiver 3. This makes it possible to reduce deformation of the eaves gutter 2, particularly deformation of the first side wall 21, such as the first side wall 21 collapsing inward (towards the second side wall 22) or, conversely, the first side wall 21 collapsing outward (the opposite side to the second side wall 22).

[0047] In particular, in the eaves gutter 2, at least the bottom wall 20, the first side wall 21, and the second side wall 22 are integrally formed by extrusion molding of a resin material. Therefore, the strength of the first side wall 21 and the second side wall 22 is reduced compared to when the entire eaves gutter is formed of a metal plate. The first side wall 21 and the second side wall 22 are likely to receive a relatively large force due to the influence of pressure from rainwater, etc., accumulated in the eaves gutter 2, wind pressure, etc. The eaves gutter formed entirely of a metal plate is directly fixed to the receiving tool by screws or the like. However, considering the decrease in strength of the first side wall 21 and the second side wall 22 when a resin material is used, direct fixing by screws or the like can be a cause of damage to the first side wall 21 and the second side wall 22 themselves. In this embodiment, the protruding portion 23 of the eaves gutter 2 fits into the recess 333 of the connecting portion 33 of the receiving tool 3, so that the protruding portion 23 is connected to the connecting portion 33, and therefore there is no need to use screws or the like, and damage to the eaves gutter 2 is prevented.

[0048] The connecting portion 34 connects the first arm 31 and the second arm 32 on the upper surface side of the bottom wall 20 of the eaves gutter 2. The connecting portion 34 suppresses the deformation of the first arm 31 and the second arm 32 in a direction away from each other. As a result, even if the first side wall 21 and the second side wall 22 of the eaves gutter 2 try to deform in a direction away from each other, the first arm 31 and the second arm 32 reduce the possibility of such deformation. The connecting portion 34 of FIG. 6 connects the upper end of the first arm 31 and the upper end of the second arm 32. The connecting portion 34 of FIG. 6 has a first portion 341 extending from the upper end of the first arm 31 to the second arm 32 side, and a second portion 342 extending from the upper end of the second arm 32 to the first arm 31 side. The first portion 341 is formed integrally with the first arm 31. The second portion 342 is integrally formed with the second arm portion 32. The first portion 341 and the second portion 3421 are connected to each other by a screw 3d. The screw 3d may be used to attach the receiver 3 to the roof 10a of the building 10.

[0049] The receiver 3 in FIG. 6 is composed of two members, a first member 3a and a second member 3b. Both the first member 3a and the second member 3b are made of a metal material. The first member 3a in FIG. 6 includes a first arm 31, a joint 33, and a first portion 341 of the connecting portion 34. The first member 3a is formed by bending a metal plate. The metal plate has, for example, a substantially constant width and thickness in the length direction. Therefore, the first arm 31, the joint 33, and the first portion 341 of the connecting portion 34 are made of the same metal plate.

[0050] Fig. 7 is a partial enlarged view of the receiver 3. As shown in Fig. 7, the first arm 31 is formed from a metal plate 300. The joint 33 is formed by bending a part of the metal plate 300. In Fig. 7, the joint 33 is formed by cutting and raising a part 301 in the center in the width direction of the metal plate 300. By forming the joint 33, an opening 302 exists in the metal plate 300.

[0051] 6 includes the support portion 30, the second arm portion 32, the second portion 342 of the connecting portion 34, and the fixing portion 35. The second member 3b is formed by bending a metal plate. The metal plate has, for example, a substantially constant width and thickness in the length direction.

[0052] An example of the metal plate used to form the first member 3a and the second member 3b is a plated steel plate. The thickness of the metal plate is, for example, about 3 mm to 4 mm. The width of the metal plate is, for example, about 20 mm. In this case, the width of the joint 33 may be about 10 mm.

[0053] In the eaves gutter support structure 4 of this embodiment, the receiver 3 is attached to the eaves gutter 2 as shown in Figures 2 to 4. In particular, when attaching the eaves gutter 2 to the receiver 3, the bottom wall 20, first side wall 21 and second side wall 22 of the eaves gutter 2 are arranged so as to be in contact with the support portion 30, first arm portion 31 and second arm portion 32 of the receiver 3, respectively, and further, the protruding portion 23 of the eaves gutter 2 is joined to the connecting portion 33 of the receiver 3. In this way, the protruding portion 23 located at the upper end of the first side wall 21 of the eaves gutter 2 is joined to the connecting portion 33 of the receiver 3. This reduces deformation of the eaves gutter 2.

[0054] The drain 5 is disposed at the outlet 20a of the eaves gutter 2. The drain 5 reduces the generation of vortexes and entrainment of air at the outlet 20a. The drain 5 may contribute to the generation of the siphon phenomenon. The drain 5 may have a known configuration.

[0055] The drainage section 6 is installed to drain rainwater from the drop outlet 20a of the eaves gutter 2 to the inlet section 12. The drainage section 6 in Fig. 1 includes a downspout 61, a nominal gutter 62, a first elbow 63, a second elbow 64, and an auxiliary downspout 65. As an example, the length of the downspout 61 is 10 m, the length of the nominal gutter 62 is 1 m, and the length of the auxiliary downspout 65 is 0.2 m.

[0056] The downspout 61 forms a flow path for vertically flowing rainwater from the drop outlet 20a of the eaves gutter 2. The downspout 61 is a straight pipe. The cross section perpendicular to the pipe axis of the downspout 61 is circular. The material of the downspout 61 is, for example, rigid polyvinyl chloride. The dimensions of the downspout 61, for example, the outer shape and thickness, may be set according to the standard for rigid polyvinyl chloride pipe (general) of JIS K 6741 "Rigid Polyvinyl Chloride Pipe". The downspout 61 in FIG. 1 is disposed so that the direction of the pipe axis of the downspout 61 coincides with the up-down direction (vertical direction). The downspout 61 has an upstream end and a downstream end. The upstream end of the downspout 61 is the end connected to the drop outlet 20a in the downspout 61 (the upper end in FIG. 1). The downstream end of the downpipe 61 is the end (the lower end in FIG. 1) of the downpipe 61 that is inserted into the manhole 12. In FIG. 1, a drain pipe cover 61a is arranged to prevent rainwater from flowing into the manhole 12 through a gap between the downpipe 61 and the manhole 12.

[0057] 1, the downspout 61 is not directly connected to the drop outlet 20a. In the drainage section 6, the downspout 61 is connected to the drop outlet 20a via a nominal downspout 62, a first elbow 63, a second elbow 64, and an auxiliary downspout 65.

[0058] The downspout 62 is a part for draining rainwater from the building 10 from the drop outlet 20a of the eaves gutter 2 to the downspout 61. The downspout 62 is located between the downspout 20a for rainwater from the building 10 and the downspout 61. The downspout 62 forms a flow path for draining rainwater from the drop outlet 20a approximately horizontally. The downspout 62 has an upstream end and a downstream end. The upstream end of the downspout 62 is the end of the downspout 62 that is connected to the drop outlet 20a (the left end in FIG. 1). The downstream end of the downspout 62 is the end of the downspout 62 that is connected to the downspout 61 (the right end in FIG. 1).

[0059] The first elbow 63 connects the upstream end of the call pipe 62 to the drop port 20a. The first elbow 63 is not necessarily a member that directly connects the upstream end of the call pipe 62 to the drop port 20a, but may be a member that indirectly connects the upstream end of the call pipe 62 to the drop port 20a via another member. The material of the first elbow 63 is, for example, rigid polyvinyl chloride. The first elbow 63 has upstream and downstream receiving ports for connecting pipe materials such as the downpipe 61 and the call pipe 62 to the first elbow 63. The angle between the central axes of the upstream and downstream receiving ports is, for example, 91.17° as specified in JIS K 6739 "Rigid polyvinyl chloride pipe joint for drainage". The corners of the inner and outer periphery of the first elbow 63 on a plane including the pipe axis of the first elbow 63 are not R-shaped but are approximately right-angled.

[0060] The second elbow 64 connects the downstream end of the call pipe 62 to the upstream end of the downpipe 61. The second elbow 64 is not necessarily a member that directly connects the downstream end of the call pipe 62 to the upstream end of the downpipe 61, but may be a member that indirectly connects the downstream end of the call pipe 62 to the upstream end of the downpipe 61 via another member. The material of the second elbow 64 is, for example, rigid polyvinyl chloride. The second elbow 64 has upstream and downstream sockets for connecting pipe materials such as the downpipe 61 and the call pipe 62 to the second elbow 64. The angle between the central axes of the upstream and downstream sockets is, for example, 91.17° as specified in JIS K 6739 "Rigid polyvinyl chloride pipe joints for drainage". The corners of the inner and outer periphery of the second elbow 64 on a plane including the pipe axis of the second elbow 64 are not R-shaped but are approximately right-angled.

[0061] The dimensions of the first elbow 63 and the second elbow 64 may be set in accordance with, for example, the standard JIS K 6739 "Rigid polyvinyl chloride pipe joint for drainage." At least one of the first elbow 63 and the second elbow 64 may be a 90° bent elbow as specified in JIS K 6739.

[0062] The auxiliary downspout 65 is a part for vertically draining rainwater from the building 10 from the drop outlet 20a to the first elbow 63. The auxiliary downspout 65 is located between the drop outlet 20a and the first elbow 63. The auxiliary downspout 65 is a straight pipe. The cross section perpendicular to the pipe axis of the auxiliary downspout 65 is circular. The material of the auxiliary downspout 65 is rigid polyvinyl chloride. The dimensions of the auxiliary downspout 65, for example, the outer shape and thickness, may be set according to the standard for rigid polyvinyl chloride pipe (general) of JIS K 6741 "rigid polyvinyl chloride pipe". The auxiliary downspout 65 in FIG. 1 is disposed between the drop outlet 20a and the first elbow 63 so that the direction of the pipe axis of the auxiliary downspout 65 coincides with the up-down direction (vertical direction). The auxiliary downspout 65 has an upstream end and a downstream end. The upstream end of the auxiliary downpipe 65 is the end connected to the drop outlet 20a in the auxiliary downpipe 65 (the upper end in FIG. 1). The downstream end of the auxiliary downpipe 65 is the end connected to the first elbow 63 in the auxiliary downpipe 65 (the lower end in FIG. 1).

[0063] [1.1.2 Effects, etc.] The above-mentioned eaves gutter 2 includes a bottom wall 20 and first and second side walls 21, 22 extending upward from both sides in the width direction of the bottom wall 20. If the length of the first straight line S1 connecting the upper end 21a and the lower end 21b of the first side wall 21 is L1, the angle between the thickness direction of the bottom wall 20 and the first straight line S1 is θ1, the height of the first side wall 21 is H1, the length of the second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22 is L2, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 is θ2, the height of the second side wall 22 is H2, and the width of the bottom wall 20 is W, then the following are satisfied: H1=L1cosθ1, H2=L2cosθ2, |θ1|≦10°, |θ2|≦10°, H1≧H2, W≧200mm, and H2≧200mm. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0064] In the eaves gutter 2, H2 / W≧0.5 is satisfied. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0065] In the eaves gutter 2, H2 / W≧2 / 3 is satisfied. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0066] In the eaves gutter 2, H2 / W≦2.5 is satisfied. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0067] The eaves gutter 2 satisfies W≧240 mm. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0068] The eaves gutter 2 satisfies W≧350 mm. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0069] The eaves gutter 2 satisfies W≦450 mm. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0070] The eaves gutter 2 satisfies W≦400 mm. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0071] In the eaves gutter 2, θ1 satisfies θ1≧0°, with the positive direction being the direction in which the upper end 21a of the first side wall 21 moves away from the upper end 22a of the second side wall 22. This configuration can reduce deterioration of drainage performance and occurrence of overflow.

[0072] In the eaves gutter 2, θ2 satisfies θ2≧0°, with the positive direction being the direction in which the upper end 22a of the second side wall 22 moves away from the upper end 21a of the first side wall 21. This configuration can reduce deterioration of drainage performance and occurrence of overflow.

[0073] In the eaves gutter 2, the bottom wall 20, the first side wall 21 and the second side wall 22 are integrally formed by extrusion molding of a resin material. This configuration eliminates the need to mold the eaves gutter 2 at the construction site, making it possible to improve workability.

[0074] The receiver 3 described above supports the eaves gutter 2. The eaves gutter 2 is located at the upper end 21a of the first side wall 21 and has a protruding part 23 that protrudes inward of the eaves gutter 2. The receiver 3 has a support part 30 that extends in the width direction of the bottom wall 20 of the eaves gutter 2 and supports the underside of the bottom wall 20, first and second arms 31, 32 that extend upward from both sides of the support part 30, and a connecting part 33 that is located on the first arm 31 and connects to the protruding part 23 of the eaves gutter 2 from above. This configuration can reduce deformation of the eaves gutter 2, which can reduce deterioration of drainage performance and the occurrence of overflow.

[0075] In the receiver 3, the first arm 31 is formed from a metal plate 300. The joint 33 is formed by bending a part of the metal plate 300. This configuration makes it possible to simplify the structure of the receiver 3 and reduce manufacturing costs.

[0076] The receiver 3 is located on the upper surface side of the bottom wall 20 of the eaves gutter 2, and further includes a connecting portion 34 that connects the first and second arm portions 31, 32 to each other. This configuration can reduce deformation of the eaves gutter 2.

[0077] The eaves gutter support structure 4 described above comprises the eaves gutter 2 and a receiving device 3 that supports the eaves gutter 2. The eaves gutter 2 is located at the upper end 21a of the first side wall 21 and has a protruding portion 23 that protrudes inwardly of the eaves gutter 2. The receiving device 3 comprises a support portion 30 that extends in the width direction of the bottom wall 20 of the eaves gutter 2 and supports the underside of the bottom wall 20, first and second arms 31, 32 that extend upward from both sides of the support portion 30, and a connecting portion 33 that is located on the first arm 31 and connects to the protruding portion 23 of the eaves gutter 2 from above. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0078] In the eaves gutter support structure 4, the bottom wall 20, the first side wall 21, the second side wall 22 and the protruding portion 23 are integrally formed by extrusion molding of a resin material. This configuration eliminates the need to mold the eaves gutter 2 at the construction site, improving workability.

[0079] [1.2 Second embodiment] [1.2.1 Configuration] Fig. 8 is a cross-sectional view of a configuration example of an eaves gutter support structure 4B according to the present embodiment. The eaves gutter support structure 4A in Fig. 8 includes an eaves gutter 2A and a receiving tool 3A.

[0080] The eaves gutter 2A includes a bottom wall 20, a first side wall 21, a second side wall 22, and a protrusion 23. In the eaves gutter 2A, the first side wall 21 and the second side wall 22 extend upward along the thickness direction of the bottom wall 20 from both sides in the width direction of the bottom wall 20.

[0081] Fig. 9 is a cross-sectional view of the eaves gutter 2A. In the eaves gutter 2A of Fig. 9, the length of the first straight line S1 connecting the upper end 21a and the lower end 21b of the first side wall 21 is L1, and the height of the first side wall 21 is H1. The eaves gutter 2A satisfies H1=L1. In other words, the angle between the thickness direction of the bottom wall 20 and the first straight line S1 (the angle corresponding to θ1 shown in Fig. 5) is 0°. In the eaves gutter 2A of Fig. 9, the length L1 of the straight line S1 is equal to the width of the first side wall 21 (the dimension in the vertical direction in Fig. 9).

[0082] In the eaves gutter 2A of Fig. 9, the length of the second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22 is L2, and the height of the second side wall 22 is H2. The eaves gutter 2 satisfies H2=L2. That is, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 (the angle corresponding to θ2 shown in Fig. 5) is 0°. In the eaves gutter 2A of Fig. 9, the length L2 of the straight line S2 is equal to the width of the second side wall 22 (the dimension in the vertical direction in Fig. 9).

[0083] The eaves gutter 2A in Fig. 9 satisfies H1 ≧ H2. In other words, the eaves gutter 2 satisfies L1 ≧ L2. In particular, in the eaves gutter 2A in Fig. 9, H1>H2.

[0084] The eaves gutter 2A in Fig. 9 satisfies W ≧ 200mm and satisfies H2 ≧ 200mm. The eaves gutter 2A preferably satisfies W ≧ 240mm. The eaves gutter 2A more preferably satisfies W ≧ 350mm. The eaves gutter 2A preferably satisfies W ≦ 450mm. The eaves gutter 2A more preferably satisfies W ≦ 400mm.

[0085] Regarding the relationship between H2 and W, the eaves gutter 2A preferably satisfies H2 / W≧0.5. The eaves gutter 2A more preferably satisfies H2 / W≧2 / 3. The eaves gutter 2A preferably satisfies H2 / W≦2.5.

[0086] The receiver 3A supports the eaves gutter 2A. The receiver 3A is used to install the eaves gutter 2A at the eaves end of the roof 10a of the building 10. The receiver 3A comprises a support part 30, first and second arms 31, 32, a joining part 33, a connecting part 34, and a fixing part 35. In the receiver 3A, the first arm 31 and the second arm 32 extend upward from both sides of the support part 30 along the thickness direction of the support part 30.

[0087] [1.2.2 Effects, etc.] The above-mentioned eaves gutter 2A includes a bottom wall 20 and first and second side walls 21, 22 extending upward from both sides in the width direction of the bottom wall 20. If the length of the first straight line S1 connecting the upper end 21a and the lower end 21b of the first side wall 21 is L1, the height of the first side wall 21 is H1, the length of the second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22 is L2, the height of the second side wall 22 is H2, and the width of the bottom wall 20 is W, then the following are satisfied: H1=L1, H2=L2, H1≧H2, W≧200mm, and H2≧200mm. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0088] The receiver 3A described above supports the eaves gutter 2A. The eaves gutter 2A is located at the upper end 21a of the first side wall 21 and has a protruding portion 23 that protrudes inward of the eaves gutter 2A. The receiver 3A has a support portion 30 that extends in the width direction of the bottom wall 20 of the eaves gutter 2A and supports the lower surface of the bottom wall 20, first and second arms 31, 32 that extend upward from both sides of the support portion 30, and a connecting portion 33 that is located on the first arm 31 and connects to the protruding portion 23 of the eaves gutter 2A from above. This configuration can reduce deformation of the eaves gutter 2, which can reduce deterioration of drainage performance and the occurrence of overflow.

[0089] The eaves gutter support structure 4A described above comprises the eaves gutter 2A and a receiving device 3A that supports the eaves gutter 2A. The eaves gutter 2A is located at the upper end 21a of the first side wall 21 and has a protruding portion 23 that protrudes inwardly of the eaves gutter 2A. The receiving device 3A comprises a support portion 30 that extends in the width direction of the bottom wall 20 of the eaves gutter 2A and supports the lower surface of the bottom wall 20, first and second arms 31, 32 that extend upward from both sides of the support portion 30, and a connecting portion 33 that is located on the first arm 31 and connects to the protruding portion 23 of the eaves gutter 2A from above. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0090] [1.3 Third embodiment] [1.3.1 Configuration] Fig. 10 is a cross-sectional view of a configuration example of an eaves gutter support structure 4B according to the present embodiment. The eaves gutter support structure 4B in Fig. 10 includes an eaves gutter 2 and a receiving tool 3B.

[0091] The receiver 3B in FIG. 10 includes a support portion 30, first and second arm portions 31, 32, a joining portion 33B, a connecting portion , and a fixing portion .

[0092] The connecting portion 33B in FIG. 10 is located on the first arm 31. The connecting portion 33B is configured to connect to the protruding portion 23 of the eaves gutter 2 from above. The connecting portion 33B in FIG. 10 includes a first piece 331 extending from the first arm 31 toward the second arm 32, a second piece 332 extending from the tip of the first piece 331 toward the support portion 30, and a slip-off prevention piece 334 extending from the tip of the second piece 332 toward the support portion 30. The connecting portion 33B forms a recess 333 between the first arm 31 and the first piece 331 and the second piece 332. The recess 333 is sized to fit the protruding portion 23 of the eaves gutter 2.

[0093] The detachment prevention piece 334 restricts the movement of the protruding portion 23 of the eaves gutter 2 so that the protruding portion 23 does not come off from the connecting portion 33B. The detachment prevention piece 334 in FIG. 10 has elasticity and is shaped to partially protrude toward the first side wall 21. The gap between the detachment prevention piece 334 and the first side wall 21 is narrower than the gap between the second piece 332 and the first side wall 21, so that the protruding portion 23 can be maintained in a state in which it is positioned in the recess 333 of the connecting portion 33B. Since the detachment prevention piece 334 has elasticity, when the protruding portion 23 is to be removed from the connecting portion 33B, the detachment prevention piece 334 is elastically deformed so that the gap between the detachment prevention piece 334 and the first side wall 21 becomes wider. The detachment prevention piece 334 in FIG. 10 fixes the protruding portion 23 so that it does not come off from the connecting portion 33B by a so-called snap fit.

[0094] [1.3.2 Effects, etc.] In the receiver 3B described above, the connecting portion 33B is provided with a detachment prevention piece 334 that limits the movement of the protruding portion 23 of the eaves gutter 2 so that the protruding portion 23 does not come off from the connecting portion 33B. This configuration can reduce the possibility that the connection between the connecting portion 33 and the protruding portion 23 will come off unintentionally.

[0095] [1.4 Fourth embodiment] [1.4.1 Configuration] Fig. 11 is a cross-sectional view of a configuration example of an eaves gutter support structure 4C according to the present embodiment. The eaves gutter support structure 4C in Fig. 11 includes an eaves gutter 2 and a receiving tool 3C.

[0096] The receiver 3C in FIG. 11 includes a support portion 30, first and second arm portions 31, 32, a joining portion 33C, a connecting portion , and a fixing portion .

[0097] The connecting portion 33C in FIG. 11 is located on the first arm 31. The connecting portion 33C is configured to connect to the protruding portion 23 of the eaves gutter 2 from above. The connecting portion 33C in FIG. 11 includes a fixed piece 335 fixed to the first arm 31, a first piece 331 extending from the fixed piece 335 towards the second arm 32, and a second piece 332 extending from the tip of the first piece 331 towards the support portion 30. The connecting portion 33C forms a recess 333 between the first arm 31 and the first piece 331 and the second piece 332. The recess 333 is sized so that the protruding portion 23 of the eaves gutter 2 fits into it.

[0098] The receiver 3C in FIG. 11 is composed of three members, a first member 3a, a second member 3b, and a connecting portion 33C. The first member 3a, the second member 3b, and the connecting portion 33C are all formed of metal materials. The first member 3a in FIG. 11 includes a first arm portion 31 and a first portion 341 of the connecting portion 34. The first member 3a is formed by bending a metal plate. The metal plate has, for example, a substantially constant width and thickness in the length direction. The second member 3b in FIG. 11 includes a support portion 30, a second arm portion 32, a second portion 342 of the connecting portion 34, and a fixing portion 35. The second member 3b is formed by bending a metal plate. The metal plate has, for example, a substantially constant width and thickness in the length direction. The connecting portion 33C in FIG. 11 is formed by bending a metal plate.

[0099] Fig. 12 is a partial enlarged view of the receiver 3C. As shown in Fig. 12, the connecting portion 33C is fixed to the first arm portion 31 by welding. In this embodiment, the connecting portion 33C is fixed to the first arm portion 31 by welding the fixing piece 335 of the connecting portion 33C to the first arm portion 31. Spot welding can be used as a method for welding the fixing piece 335 of the connecting portion 33C to the first arm portion 31.

[0100] An example of the metal plate material used to form the first member 3a, the second member 3b, and the joint 33C is a plated steel plate. The joint 33C does not require as much strength as the first member 3a and the second member 3b. Therefore, the metal plate material used to form the joint 33C may be thinner than the metal plate material used to form the first member 3a and the second member 3b. As an example, the thickness of the metal plate material used to form the first member 3a and the second member 3b is about 3 mm to 4 mm, and the thickness of the metal plate material used to form the joint 33C is about 2 mm.

[0101] In the present embodiment, the connecting portion 33C is a separate member and is not integrally formed with the first arm portion 31. Therefore, the connecting portion 33C can be designed independently of the first arm portion 31. This improves the degree of freedom in designing the connecting portion 33C.

[0102] [1.4.2 Effects, etc.] In the receiver 3C described above, the connecting portion 33C is fixed by welding to the first arm portion 31. This configuration can improve the degree of freedom in designing the connecting portion 33C.

[0103] [1.5 Fifth embodiment] [1.5.1 Configuration] Fig. 13 is a cross-sectional view of a configuration example of an eaves gutter support structure 4D according to this embodiment. The eaves gutter support structure 4D in Fig. 13 includes an eaves gutter 2 and a receiving tool 3D.

[0104] The connecting portion 33D in FIG. 13 is located on the first arm 31. The connecting portion 33D is configured to connect to the protruding portion 23 of the eaves gutter 2 from above. The connecting portion 33D in FIG. 13 includes an attachment piece 336 attached to the first arm 31, a first piece 331 extending from the attachment piece 336 towards the second arm 32, and a second piece 332 extending from the tip of the first piece 331 towards the support portion 30. The connecting portion 33D forms a recess 333 between the first arm 31 and the first piece 331 and the second piece 332. The recess 333 is sized so that the protruding portion 23 of the eaves gutter 2 fits into it.

[0105] The receiver 3D in FIG. 13 is composed of three members, a first member 3a, a second member 3b, and a connecting portion 33D. The first member 3a, the second member 3b, and the connecting portion 33C are all formed of metal materials. The first member 3a in FIG. 13 includes a first arm portion 31 and a first portion 341 of the connecting portion 34. The first member 3a is formed by bending a metal plate. The metal plate has, for example, a substantially constant width and thickness in the length direction. The second member 3b in FIG. 13 includes a support portion 30, a second arm portion 32, a second portion 342 of the connecting portion 34, and a fixing portion 35. The second member 3b is formed by bending a metal plate. The metal plate has, for example, a substantially constant width and thickness in the length direction. The connecting portion 33D in FIG. 13 is formed by bending a metal plate.

[0106] 13 is attached to the first arm 31 by a connector 36. More specifically, an attachment piece 336 of the connector 33D is attached to the first arm 31 by the connector 36. In this embodiment, the connector 36 is composed of a wing nut and a bolt.

[0107] FIG. 14 is a partial enlarged view of the receiver 3D. As shown in FIG. 14, the coupling portion 33D is movable between a first position where it is coupled to the protrusion 23 and a second position where it is not coupled to the protrusion 23. In FIG. 14, the coupling portion 33D in the first position is illustrated by a solid line, and the coupling portion 33D in the second position is illustrated by a two-dot chain line. As shown in FIG. 14, the coupling portion 33D is attached to the first arm portion 31 so as to be rotatable between the first position and the second position. The rotation axis of the coupling portion 33D is defined by the connector 36. That is, the coupling portion 33D is rotatable around the connector 36 between the first position and the second position. In other words, the connector 36 connects the coupling portion 33D to the first arm portion 31 so that the coupling portion 33D is rotatable between the first position and the second position with respect to the first arm portion 31. An example of the connector 36 is a combination of a wing nut and a bolt, as described above, but is not particularly limited as long as the connector 36 can be connected to the first arm 31 so as to be rotatable between the first position and the second position.

[0108] In the eaves gutter support structure 4D of this embodiment, when attaching the eaves gutter 2 to the receiver 3D, the connecting portion 33D is positioned at the second position. After this, the bottom wall 20, the first side wall 21 and the second side wall 22 of the eaves gutter 2 are arranged so as to be in contact with the support portion 30, the first arm portion 31 and the second arm portion 32 of the receiver 3D, respectively. Next, the connecting portion 33D is moved from the second position to the first position, and the protruding portion 23 of the eaves gutter 2 is connected to the connecting portion 33D of the receiver 3D. This makes it possible to easily connect the connecting portion 33D and the protruding portion 23.

[0109] [1.5.2 Effects, etc.] In the receiver 3D described above, the coupling portion 33D is movable between a first position where it is coupled to the protrusion 23 and a second position where it is not coupled to the protrusion 23. This configuration makes it possible to easily couple the coupling portion 33D and the protrusion 23 together.

[0110] In the receiver 3D, the coupling portion 33D is attached to the first arm portion 31 so as to be rotatable between a first position and a second position. This configuration makes it possible to easily couple the coupling portion 33D and the protrusion portion 23.

[0111] [1.6 Sixth embodiment] [1.6.1 Configuration] Fig. 15 is a cross-sectional view of a configuration example of an eaves gutter support structure 4E according to the present embodiment. The eaves gutter support structure 4E in Fig. 15 includes an eaves gutter 2E and a receiving tool 3E.

[0112] 16 is a cross-sectional view of the eaves gutter 2E. The eaves gutter 2E includes a bottom wall 20, a first side wall 21, a second side wall 22, and a protrusion 23. In the eaves gutter 2E, the first side wall 21 and the second side wall 22 extend upward from both sides in the width direction of the bottom wall 20. The first side wall 21 and the second side wall 22 are plate-shaped having a length, width, and thickness. The first side wall 21 and the second side wall 22 are rectangular plate-shaped. In the length direction of the first side wall 21, the width and thickness of the first side wall 21 are approximately constant. In the length direction of the second side wall 22, the width and thickness of the second side wall 22 are approximately constant.

[0113] In this embodiment, the first side wall 21 and the second side wall 22 are curved in the width direction. The first side wall 21 is curved so that the center in the width direction is located outside the eaves gutter 2E from the first straight line S1 connecting the upper end 21a and the lower end 21b of the first side wall 21. The second side wall 22 is curved so that the center in the width direction is located outside the eaves gutter 2E from the second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22. In FIG. 16, the first straight line S1 is illustrated as being shifted in parallel from between the upper end 21a and the lower end 21b only for ease of viewing. The second straight line S2 is illustrated as being shifted in parallel from between the upper end 22a and the lower end 22b.

[0114] In the eaves gutter 2E of Fig. 16, the length of the first straight line S1 connecting the upper end 21a and the lower end 21b of the first side wall 21 is L1, the angle between the thickness direction of the bottom wall 20 and the first straight line S1 is θ1, and the height of the first side wall 21 is H1. The eaves gutter 2E satisfies H1 = L1 cos θ1. In the eaves gutter 2E of Fig. 16, the length L1 of the straight line S1 is equal to the width of the first side wall 21.

[0115] In the eaves gutter 2E of Fig. 16, the length of the second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22 is L2, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 is θ2, and the height of the second side wall 22 is H2. The eaves gutter 2E satisfies H2 = L2 cos θ2. In the eaves gutter 2E of Fig. 16, the length L2 of the straight line S2 is equal to the width of the second side wall 22.

[0116] The eaves gutter 2E in Fig. 16 satisfies |θ1|≦10°. The positive direction of θ1 is the direction in which the upper end 21a of the first side wall 21 moves away from the upper end 22a of the second side wall 22 (counterclockwise direction in Fig. 16). It is preferable that the eaves gutter 2E satisfies θ1 ≧ 0°.

[0117] The eaves gutter 2E in Fig. 16 satisfies |θ2|≦10°. The positive direction of θ2 is the direction in which the upper end 22a of the second side wall 22 moves away from the upper end 21a of the first side wall 21 (the clockwise direction in Fig. 16). It is preferable that the eaves gutter 2E satisfies θ2 ≧ 0°.

[0118] The eaves gutter 2E in Fig. 16 satisfies H1 ≧ H2. That is, the eaves gutter 2E satisfies L1 cos θ1 ≧ L2 cos θ2. In particular, in the eaves gutter 2E in Fig. 16, H1 > H2.

[0119] The eaves gutter 2E in Fig. 16 satisfies W ≧ 200mm and satisfies H2 ≧ 200mm. The eaves gutter 2E preferably satisfies W ≧ 240mm. The eaves gutter 2E more preferably satisfies W ≧ 350mm. The eaves gutter 2E preferably satisfies W ≦ 450mm. The eaves gutter 2E more preferably satisfies W ≦ 400mm.

[0120] Regarding the relationship between H2 and W, the eaves gutter 2E preferably satisfies H2 / W≧0.5. The eaves gutter 2E more preferably satisfies H2 / W≧2 / 3. The eaves gutter 2E preferably satisfies H2 / W≦2.5.

[0121] The receiver 3E supports the eaves gutter 2E. The receiver 3E is used to install the eaves gutter 2E at the eaves edge of the roof 10a of the building 10. The receiver 3E includes a support portion 30, first and second arms 31, 32, a joining portion 33, a connecting portion 34, and a fixing portion 35. In the receiver 3E, the first arm 31 and the second arm 32 are curved to match the shapes of the first side wall 21 and the second side wall 22.

[0122] [1.6.2 Effects, etc.] The eaves gutter 2E described above includes a bottom wall 20, and first and second side walls 21, 22 extending upward from both sides in the width direction of the bottom wall 20. If the length of a first straight line S1 connecting the upper end 21a and the lower end 21b of the first side wall 21 is L1, the angle between the thickness direction of the bottom wall 20 and the first straight line S1 is θ1, the height of the first side wall 21 is H1, the length of a second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22 is L2, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 is θ2, the height of the second side wall 22 is H2, and the width of the bottom wall 20 is W, then the following are satisfied: H1=L1cosθ1, H2=L2cosθ2, |θ1|≦10°, |θ2|≦10°, H1≧H2, W≧200mm, and H2≧200mm. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0123] [1.7 Seventh embodiment] [1.7.1 Configuration] Fig. 17 is a cross-sectional view of a configuration example of an eaves gutter support structure 4F according to the present embodiment. The eaves gutter support structure 4F in Fig. 17 includes an eaves gutter 2F and a receiving tool 3F.

[0124] The eaves gutter 2F in FIG. 17 includes a bottom wall 20, a first side wall 21, a second side wall 22, a protruding portion (first protruding portion) 23, and a protruding portion (second protruding portion) 24.

[0125] The second protruding portion 24 is located at the upper end 22a of the second side wall 22, and protrudes inwardly of the eaves gutter 2. The inner side of the eaves gutter 2 is the direction from both sides in the width direction of the bottom wall 20 toward the center in the width direction of the bottom wall 20.

[0126] In this embodiment, the bottom wall 20, the first side wall 21, the second side wall 22, and the protrusions 23, 24 are integrally formed. The bottom wall 20, the first side wall 21, the second side wall 22, and the protrusions 23, 24 constitute the eaves gutter member 2a. The eaves gutter member 2a is formed, for example, by extrusion molding. The eaves gutter member 2a is mainly formed from a resin material. The eaves gutter member 2a may include a core material for reinforcing the strength of the entire eaves gutter 2F. The core material may be made of, for example, a metal.

[0127] A receiver 3F in FIG. 17 includes a support portion 30, first and second arm portions 31, 32, a coupling portion (first coupling portion) 33, a connecting portion 34, a fixing portion 35, and a coupling portion (second coupling portion) 37.

[0128] The second connecting portion 37 is located on the second arm 32. The second connecting portion 37 is configured to connect to the second protruding portion 24 of the eaves gutter 2 from above. The second connecting portion 37 in FIG. 17 comprises a first piece 371 extending from the second arm 32 toward the first arm 31, and a second piece 372 extending from the tip of the first piece 371 toward the support portion 30. The second connecting portion 37 forms a recess 373 between the second arm 32 and the first piece 371 and the second piece 372. The recess 373 is sized to fit the second protruding portion 24 of the eaves gutter 2F.

[0129] The dimensions of the second coupling part 37 can be set so that the second protrusion 24 does not come off from the second coupling part 37, that is, so that the second protrusion 24 does not come out of the recess 373 of the second coupling part 37, during normal use of the gutter system. In an environment in which the gutter system is installed, the eaves gutter 2F may sway in the wind. In such a case, it is desirable that the second protrusion 24 does not come off from the second coupling part 37.

[0130] The receiver 3F in Fig. 17 is composed of two members, a first member 3a and a second member 3b. Both the first member 3a and the second member 3b are formed from a metal material. The first member 3a in Fig. 17 includes a first arm portion 31, a first joining portion 33, and a first portion 341 of the connecting portion 34. The first member 3a is formed by bending a metal plate. The metal plate has, for example, a substantially constant width and thickness in the length direction.

[0131] The second member 3b in Fig. 17 includes the second arm 32, the second joint 37, and the second portion 342 of the connecting portion 34. The second member 3b is formed by bending a metal plate. The metal plate has, for example, a substantially constant width and thickness in the length direction. Therefore, the second arm 32, the second joint 37, and the second portion 342 of the connecting portion 34 are formed from the same metal plate.

[0132] The second joint 37 is formed by bending a part of the metal plate that forms the second arm 32. In Fig. 17, the second joint 37 is formed by cutting and raising a part of the center in the width direction of the metal plate. By forming the second joint 37, an opening 303 exists in the metal plate.

[0133] [1.7.2 Effects, etc.] The above-described eaves gutter 2F includes a bottom wall 20 and first and second side walls 21, 22 extending upward from both sides in the width direction of the bottom wall 20. If the length of a first straight line S1 connecting the upper end 21a and the lower end 21b of the first side wall 21 is L1, the angle between the thickness direction of the bottom wall 20 and the first straight line S1 is θ1, the height of the first side wall 21 is H1, the length of a second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22 is L2, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 is θ2, the height of the second side wall 22 is H2, and the width of the bottom wall 20 is W, the following are satisfied: H1=L1cosθ1, H2=L2cosθ2, |θ1|≦10°, |θ2|≦10°, H1≧H2, W≧200mm, and H2≧200mm. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0134] The above-mentioned receiving tool 3F supports the eaves gutter 2F. The eaves gutter 2F is located at the upper end 21a of the first side wall 21 and has a first protruding part 23 that protrudes inwardly of the eaves gutter 2F, and a second protruding part 24 that is located at the upper end 22a of the second side wall 22 and protrudes inwardly of the eaves gutter 2F. The receiving tool 3F includes a support part 30 that extends in the width direction of the bottom wall 20 of the eaves gutter 2F and supports the lower surface of the bottom wall 20, first and second arm parts 31, 32 that extend upward from both sides of the support part 30, a first connecting part 33 that is located at the first arm part 31 and connects from above to the first protruding part 23 of the eaves gutter 2F, and a second connecting part 37 that is located at the second arm part 32 and connects from above to the second protruding part 24 of the eaves gutter 2F. This configuration can reduce deformation of the eaves gutter 2F, which can reduce deterioration of drainage performance and occurrence of overflow.

[0135] The above-described eaves gutter support structure 4F includes the eaves gutter 2F and a receiving member 3F that supports the eaves gutter 2F. The eaves gutter 2F includes a bottom wall 20 and first and second side walls 21, 22 extending upward from both sides of the bottom wall 20 in the width direction. If the length of the first straight line S1 connecting the upper end 21a and the lower end 21b of the first side wall 21 is L1, the angle between the thickness direction of the bottom wall 20 and the first straight line S1 is θ1, the height of the first side wall 21 is H1, the length of the second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22 is L2, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 is θ2, the height of the second side wall 22 is H2, and the width of the bottom wall 20 is W, then the following relationships are satisfied: H1=L1cosθ1, H2=L2cosθ2, |θ1|≦10°, |θ2|≦10°, H1≧H2, W≧200mm, H2≧200mm. The eaves gutter 2F is provided with a first protruding portion 23 located at the upper end 21a of the first side wall 21 and protruding inward of the eaves gutter 2F, and a second protruding portion 24 located at the upper end 22a of the second side wall 22 and protruding inward of the eaves gutter 2F. The receiver 3F is provided with a support portion 30 extending in the width direction of the bottom wall 20 of the eaves gutter 2F and supporting the lower surface of the bottom wall 20, first and second arm portions 31, 32 extending upward from both sides of the support portion 30, a first connecting portion 33 located at the first arm portion 31 and connecting to the first protruding portion 23 of the eaves gutter 2F from above, and a second connecting portion 37 located at the second arm portion 32 and connecting to the second protruding portion 24 of the eaves gutter 2F from above. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0136] [2. Modifications] The embodiments of the present disclosure are not limited to the above-mentioned embodiments. The above-mentioned embodiments can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Below, modified examples of the above-mentioned embodiments are listed. The modified examples described below can be applied in appropriate combination.

[0137] In one modified example, the eaves gutter 2 may have at least one of a protruding portion 23 located at the upper end 21a of the first side wall 21 and protruding inwardly of the eaves gutter 2, and a protruding portion 24 located at the upper end 22a of the second side wall 22 and protruding inwardly of the eaves gutter 2. The receiver 3 may have at least one of a connecting portion 33 located on the first arm 31 and connected to the protruding portion 23 of the eaves gutter 2 from above, and a connecting portion 37 located on the second arm 32 and connected to the protruding portion 24 of the eaves gutter 2 from above.

[0138] In one variation, the connecting portion 37 may have a detachment prevention piece similar to the detachment prevention piece 334 of the connecting portion 33B. The connecting portion 37 may be fixed to the second arm portion 32 by welding. The connecting portion 37 may be movable between a first position where it is connected to the protruding portion 24 and a second position where it is not connected to the protruding portion 24. In this case, the connecting portion 37 may be attached to the second arm portion 32 so as to be rotatable between the first position and the second position.

[0139] In one modified example, the protrusion 23 is not necessarily limited to a case where it protrudes inward of the eaves gutter 2, and may be configured to protrude at least one of the outside and the inside of the eaves gutter 2. The protrusion 24 is not necessarily limited to a case where it protrudes inward of the eaves gutter 2, and may be configured to protrude at least one of the outside and the inside of the eaves gutter 2.

[0140] In one modified example, the protrusions 23, 24 are not limited to a substantially U-shaped shape in a plane perpendicular to the longitudinal direction of the bottom wall 20 of the eaves gutter 2. The protrusions 23, 24 may have any shape that can be coupled to the coupling parts 33, 37 of the receiver 3.

[0141] In one modified example, the eaves gutter 2 does not necessarily have to have either of the protruding parts 23, 24. However, if the eaves gutter 2 has at least one of the protruding parts 23, 24, it can be attached to the roof 10a using the receiving device 3.

[0142] In one modified example, the shapes of the first side wall 21 and the second side wall 22 of the eaves gutter 2 are not particularly limited. As an example, the first side wall 21 may be curved so that the center in the width direction is located more inward of the eaves gutter 2 than a first straight line S1 connecting the upper end 21a and the lower end 21b of the first side wall 21. The second side wall 22 may be curved so that the center in the width direction is located more inward of the eaves gutter 2 than a second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22.

[0143] In one modified example, the eaves gutter 2 may include a plurality of eaves gutter members 2a. In this case, the drop opening 20a may be formed in at least one of the plurality of eaves gutter members 2a.

[0144] [3. Aspects] As is clear from the above-mentioned embodiment and modified examples, the present disclosure includes the following aspects. In the following, symbols are given in parentheses only to clarify the correspondence with the embodiment. Note that, in consideration of the readability of the text, the description of symbols in parentheses from the second time onwards may be omitted.

[0145] The first aspect is an eaves gutter (2; 2A; 2E; 2F) that includes a bottom wall (20) and first and second side walls (21, 22) extending upward from both sides in the width direction of the bottom wall (20). Let L1 be the length of a first straight line (S1) connecting the upper end (21a) and the lower end (21b) of the first side wall (21), θ1 be the angle between the thickness direction of the bottom wall (20) and the first straight line (S1), H1 be the height of the first side wall (21), L2 be the length of a second straight line (S2) connecting the upper end (22a) and the lower end (22b) of the second side wall (22), θ2 be the angle between the thickness direction of the bottom wall (20) and the second straight line (S2), H2 be the height of the second side wall (22), and W be the width of the bottom wall (20), satisfying H1=L1cosθ1, H2=L2cosθ2, |θ1|≦10°, |θ2|≦10°, H1≧H2, W≧200mm, and H2≧200mm. This embodiment can reduce the deterioration of drainage performance and the occurrence of overflow.

[0146] The second aspect is the eaves gutter (2; 2A; 2E; 2F) based on the first aspect. In the second aspect, H2 / W≧0.5 is satisfied. This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0147] The third aspect is the eaves gutter (2; 2A; 2E; 2F) based on the first or second aspect. In the third aspect, H2 / W≧2 / 3 is satisfied. This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0148] The fourth aspect is an eaves gutter (2; 2A; 2E; 2F) based on any one of the first to third aspects. In the fourth aspect, H2 / W≦2.5 is satisfied. This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0149] The fifth aspect is an eaves gutter (2; 2A; 2E; 2F) based on any one of the first to fourth aspects. In the fifth aspect, W≧240 mm is satisfied. This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0150] The sixth aspect is an eaves gutter (2; 2A; 2E; 2F) based on any one of the first to fifth aspects. In the sixth aspect, W≧350mm is satisfied. This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0151] The seventh aspect is an eaves gutter (2; 2A; 2E; 2F) based on any one of the first to sixth aspects. In the seventh aspect, W≦450 mm is satisfied. This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0152] The eighth aspect is an eaves gutter (2; 2A; 2E; 2F) based on any one of the first to seventh aspects. In the eighth aspect, W≦400 mm is satisfied. This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0153] The ninth aspect is an eaves gutter (2; 2A; 2E; 2F) based on any one of the first to eighth aspects. In the ninth aspect, θ1 satisfies θ1≧0°, with the positive direction being the direction in which the upper end (21a) of the first side wall (21) moves away from the upper end (22a) of the second side wall (22). This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0154] The tenth aspect is an eaves gutter (2; 2A; 2E; 2F) based on any one of the first to ninth aspects. In the tenth aspect, θ2 satisfies θ2≧0°, with the positive direction being the direction in which the upper end (22a) of the second side wall (22) moves away from the upper end (21a) of the first side wall (21). This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0155] The eleventh aspect is the eaves gutter (2; 2A; 2E; 2F) based on any one of the first to tenth aspects. In the eleventh aspect, the bottom wall (20), the first side wall (21) and the second side wall (22) are integrally formed by extrusion molding of a resin material. This aspect eliminates the need to mold the eaves gutter (2; 2A; 2E; 2F) at the construction site, which improves workability.

[0156] The twelfth aspect is a receiving device (3; 3A-3F) for supporting an eaves gutter (2; 2A; 2E; 2F) based on any one of the first to eleventh aspects. The eaves gutter (2; 2A; 2E; 2F) is located at least one of the upper end (21a) of the first side wall (21) and the upper end (22a) of the second side wall (22), and includes protruding parts (23, 24) protruding to at least one of the outer side and the inner side of the eaves gutter (2; 2A; 2E; 2F). The receiving device (3; 3A-3F) includes a support part (30) extending in the width direction of the bottom wall (20) of the eaves gutter (2; 2A; 2E; 2F) and supporting the lower surface of the bottom wall (20), first and second arms (31, 32) extending upward from both sides of the support part (30), and a connecting part (33; 33B-33D, 37) located on at least one of the first arm (31) and the second arm (32) and connecting to the protruding part (23, 24) of the eaves gutter (2; 2A; 2E; 2F) from above. This embodiment can reduce deformation of the eaves gutter (2; 2A; 2E; 2F), which can reduce deterioration of drainage performance and occurrence of overflow.

[0157] The thirteenth aspect is a receiver (3; 3A; 3B; 3E; 3F) based on the twelfth aspect. In the thirteenth aspect, one of the first arm portion (31) and the second arm portion (32) is formed from a metal plate material (300). The joint portion (33; 33B-33D, 37) is formed by bending a part of the metal plate material (300). This aspect allows the structure of the receiver (3; 3A; 3B; 3E; 3F) to be simplified, and allows the manufacturing cost to be reduced.

[0158] The fourteenth aspect is the receiver (3C) based on the twelfth aspect. In the fourteenth aspect, the connecting portion (33C) is fixed to one of the first arm portion (31) and the second arm portion (32) by welding. This aspect can improve the degree of freedom in designing the connecting portion (33C).

[0159] A fifteenth aspect is a receiver (3D) based on the twelfth aspect. In the fifteenth aspect, the coupling portion (33D) is movable between a first position where it is coupled to the protrusion (23) and a second position where it is not coupled to the protrusion (23). This aspect makes it possible to facilitate coupling between the coupling portion (33D) and the protrusion (23).

[0160] A sixteenth aspect is a receiver (3D) based on the fifteenth aspect. In the sixteenth aspect, the coupling portion (33D) is attached to one of the first arm portion (31) and the second arm portion (32) so as to be rotatable between the first position and the second position. This aspect allows for easy coupling of the coupling portion (33D) and the protrusion portion (23).

[0161] The seventeenth aspect is a receiving device (3; 3A-3F) based on the twelfth aspect. In the seventeenth aspect, the receiving device (3; 3A-3F) is further provided with a connecting portion (34) that is located on the upper surface side of the bottom wall (20) of the eaves gutter (2; 2A; 2E; 2F) and connects the first and second arm portions (31, 32) to each other. This aspect can reduce deformation of the eaves gutter (2; 2A; 2E; 2F).

[0162] The 18th aspect is an eaves gutter support structure (4; 4A-4F) comprising an eaves gutter (2; 2A; 2E; 2F) based on any one of the first to eleventh aspects, and a receiving device (3; 3A-3F) that supports the eaves gutter (2; 2A; 2E; 2F). The eaves gutter (2; 2A; 2E; 2F) is located at one of the upper end (21a) of the first side wall (21) and the upper end (22a) of the second side wall (22), and comprises a protruding portion (23, 24) that protrudes to at least one of the outer side and the inner side of the eaves gutter (2; 2A; 2E; 2F). The receiving device (3; 3A-3F) includes a support part (30) that extends in the width direction of the bottom wall (20) of the eaves gutter (2; 2A; 2E; 2F) and supports the lower surface of the bottom wall (20), first and second arms (31, 32) that extend upward from both sides of the support part (30), and a connecting part (33; 33B-33D, 37) that is located on one of the first arm (31) and the second arm (32) and connects to the protruding part (23, 24) of the eaves gutter (2; 2A-2F) from above. This embodiment can reduce the deterioration of drainage performance and the occurrence of overflow.

[0163] The 19th aspect is an eaves gutter support structure (4; 4A-4F) based on the 18th aspect. In the 19th aspect, the protruding portion (23) is located at the upper end (21a) of the first side wall (21) and protrudes inward of the eaves gutter (2; 2A; 2E; 2F). The connecting portion (33; 33B-33D) is located on the first arm portion (31) and connects to the protruding portion (23) from above. This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0164] The twentieth aspect is an eaves gutter support structure (4; 4A-4F) based on the eighteenth or nineteenth aspect. In the twentieth aspect, the bottom wall (20), the first side wall (21), the second side wall (22) and the protruding portion (23) are integrally formed by extrusion molding of a resin material. This aspect eliminates the need to mold the eaves gutter (2; 2A; 2E; 2F) at the construction site, improving workability.

[0165] The above 13th to 17th aspects can be appropriately modified and applied to aspect 18. The above 2nd to 11th, 13th to 17th, 19th and 20th aspects are optional elements. [Industrial Applicability]

[0166] The present disclosure is applicable to a piping member and a gutter system. Specifically, the present disclosure is applicable to a piping member constituting a part of a piping system having an elbow connecting a first pipe extending horizontally and a second pipe extending vertically, and to a gutter system for draining rainwater. [Explanation of symbols]

[0167] 1. Gutter system 2,2A,2E,2F Eaves gutter 20 Bottom Wall 21 First side wall 21a top end 21b Bottom end 22 Second side wall 22a top end 22b Bottom end 23 Protrusion 24 Protrusion 3,3A,3B,3C,3D,3E,3F Receiver 30 Support part 31 1st arm 32 2nd arm 33,33B,33C,33D joint part 34 Connecting part 37 Joint 300 Metal Plate 4,4A,4B,4C,4D,4E,4F Eave gutter support structure

Claims

1. The bottom wall and a first side wall and a second side wall extending upward from both sides of the bottom wall in a width direction; a protruding portion located at one of an upper end of the first side wall and an upper end of the second side wall and protruding outward from the eaves gutter; A gutter having a A support for supporting the eaves gutter; Equipped with The bottom wall, the first side wall, the second side wall, and the protrusion are The length of a first straight line connecting the upper end and the lower end of the first side wall is L1. The angle between the thickness direction of the bottom wall and the first straight line is θ1. The height of the first side wall is H1. The length of the second straight line connecting the upper end and the lower end of the second side wall is L2. The angle between the thickness direction of the bottom wall and the second straight line is θ2, The height of the second side wall is H2. If the width of the bottom wall is W, H1=L1cosθ1, H2=L2cosθ2, |θ1|≦10°, |θ2|≦10°, H1 ≧ H2, W≧200 mm, H2≧200 mm, and is integrally formed by extrusion molding of a resin material so as to have a predetermined shape that satisfies the above. The receiving tool is A support portion extending in the width direction of the bottom wall of the eaves gutter and supporting a lower surface of the bottom wall; First and second arms extending upward from both sides of the support portion; a connecting portion located on one of the first arm portion and the second arm portion and connected to the protruding portion of the eaves gutter from above; Equipped with Eave gutter support structure.

2. The coupling portion is a first piece extending from one of the first and second arms to the other; a second piece extending from a tip of the first piece toward the support portion; Equipped with the coupling portion forms a recess between the first piece and the second piece, the recess being sized to fit the protrusion, When the vertical dimension of the space between the protruding portion and the first piece is g1 and the vertical dimension of the area where the protruding portion and the second piece overlap is g2, g2≧2×g1. The gutter support structure according to claim 1.

3. g1 is 1 mm or less. The gutter support structure according to claim 2.

4. The coupling portion is rotatably attached to the one of the two by a connector between a first position in which the coupling portion is coupled to the protrusion and a second position in which the coupling portion is not coupled to the protrusion, The gutter support structure according to claim 2.

5. The coupling portion includes an attachment piece attached to the one side, The first piece extends from the attachment piece to the other side, The attachment piece is attached to the one side by the connector, In the first position, the second piece overlaps with the protruding portion and the protruding portion fits into the recess; In the second position, the second piece does not overlap the protruding portion and the protruding portion does not fit into the recess. The gutter support structure according to claim 4.

6. A core material is provided to reinforce the strength of the entire eaves gutter. The gutter support structure according to claim 1.

7. The eaves gutter is a gutter member including the bottom wall, the first side wall, the second side wall, and the protruding portion, the gutter member having openings on both sides in a longitudinal direction of the bottom wall; An end member fixed to both sides in the length direction of the bottom wall of the eaves gutter member; Equipped with The gutter support structure according to claim 1.

8. The bottom wall is formed with a drop opening, The center of the drop opening coincides with the center of the bottom wall in the width direction, The distance between the drop opening and the first side wall and the distance between the drop opening and the second side wall are 34.5 mm or more. The gutter support structure according to claim 1.

9. H2 / W≧0.5 is satisfied. The gutter support structure according to claim 1.

10. H2 / W≧2 / 3 is satisfied. The gutter support structure according to claim 1.

11. H2 / W≦2.5 is satisfied; The gutter support structure according to claim 1.

12. W≧240 mm is satisfied. The gutter support structure according to claim 1.

13. W≧350 mm is satisfied. The gutter support structure according to claim 1.

14. W≦450 mm is satisfied. The gutter support structure according to claim 1.

15. W≦400 mm is satisfied. The gutter support structure according to claim 1.

16. θ1 is defined as a positive direction in which the upper end of the first side wall moves away from the upper end of the second side wall, θ1≧0° is satisfied. The gutter support structure according to claim 1.

17. θ2 is defined as a positive direction in which the upper end of the second side wall moves away from the upper end of the first side wall, θ2≧0° is satisfied. The gutter support structure according to claim 1.

18. A method for constructing a gutter system having the eaves gutter support structure according to claim 1, comprising: The eaves gutter is transported to a building site, The eaves gutter is installed at the eaves of the roof of the building by the receiving device. Construction method.

19. When attaching the eaves gutter to the receiving device, the bottom wall of the eaves gutter is arranged so as to contact the support part of the receiving device, and further, the protruding part of the eaves gutter is connected to the connecting part of the receiving device. The construction method according to claim 18.

20. Including forming a drop opening in the bottom wall, When forming a drop hole in the bottom wall, The center of the drop opening is aligned with the center of the bottom wall in the width direction, The distance between the drop opening and the first side wall and the distance between the drop opening and the second side wall are 34.5 mm or more. The construction method according to claim 18.

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