Eaves gutter, receiver, 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 receiver, and an eaves gutter support structure.

Background Art

[0002] Patent Document 1 discloses an eaves gutter and an eaves gutter hanger. In Patent Document 1, ears are provided at both upper end portions of the eaves gutter. In the eaves gutter hanger, substantially U-shaped ear support portions for fitting and supporting the ears of the eaves gutter are provided at both end portions of the eaves gutter hanger body, and an anti-disengagement piece having elasticity and facing the inner surface side of the ear of the eaves gutter whose tip fits into the ear support portion is provided on the eaves gutter hanger body. A bent L-shaped piece portion is provided by bending the tip portion of the anti-disengagement piece upward in an L shape. A protrusion protruding toward the ear support portion side is provided at a part of the corner portion of the L-shaped bent piece portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the eaves gutter as described in Patent Document 1, reduction of deterioration of drainage performance and reduction of occurrence of overflow are required. In a member for attaching an eaves gutter such as the eaves gutter hanger described in Patent Document 1 to a building, it is required that deformation of the eaves gutter can be reduced.

[0005] The present disclosure provides an eaves gutter capable of reducing deterioration of drainage performance and occurrence of overflow. The present disclosure provides a receiver capable of reducing deformation of an eaves gutter capable of reducing deterioration of drainage performance and occurrence of overflow. The present disclosure provides an eaves gutter support structure capable of reducing deterioration of drainage performance and occurrence of overflow, and further capable of reducing deformation of the eaves gutter.

Means for Solving the Problems

[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 in the width direction of the bottom wall. Let the length of the first straight line connecting the upper end and the lower end of the first side wall be L1, the angle between the thickness direction of the bottom wall and the first straight line be θ1, the height of the first side wall be H1, the length of the second straight line connecting the upper end and the lower end of the second side wall be L2, the angle between the thickness direction of the bottom wall and the second straight line be θ2, the height of the second side wall be H2, and the width of the bottom wall be W. Then, H1 = L1cosθ1, H2 = L2cosθ2, |θ1| ≤ 10°, |θ2| ≤ 10°, H1 ≥ H2, W ≥ 200 mm, and H2 ≥ 200 mm are satisfied.

[0007] The receiver according to another aspect of the present disclosure is a receiver that supports the above 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 includes a protruding portion that protrudes from at least one of the outer side and the inner side of the eaves gutter. The receiver includes a support portion that extends in the width direction of the bottom wall of the eaves gutter and supports the lower surface of the bottom wall, first and second arm portions that extend upward from both sides of the support portion, and a coupling portion that is located at at least one of the first arm portion and the second arm portion and couples to the protruding portion of the eaves gutter from above.

[0008] The eaves gutter support structure according to still another aspect of the present disclosure includes the above eaves gutter and a receiver 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 includes a protruding portion that protrudes from at least one of the outer side and the inner side of the eaves gutter. The receiver includes a support portion that extends in the width direction of the bottom wall of the eaves gutter and supports the lower surface of the bottom wall, first and second arm portions that extend upward from both sides of the support portion, and a coupling portion that is located at at least one of the first arm portion and the second arm portion and couples to the protruding portion of the eaves gutter from above.

Advantages of the Invention

[0009] One aspect of the present disclosure can reduce the decrease in drainage performance and the occurrence of overflow. Another aspect of the present disclosure can reduce the deformation of the eaves gutter that can reduce the decrease in drainage performance and the occurrence of overflow. Still another aspect of the present disclosure can reduce the decrease in drainage performance and the occurrence of overflow, and further reduce the deformation of the eaves gutter.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Modes for Carrying Out the Invention

[0011] [1. Embodiment] Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, a more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters and redundant descriptions of substantially the same configurations may be omitted. This is to avoid making the following description unnecessarily redundant and to facilitate understanding by those skilled in the art. Note that the inventors provide the accompanying drawings and the following description so that those skilled in the art can fully understand the present disclosure, and do not intend to limit the subject matter described in the claims thereby.

[0012] Unless otherwise specified, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings. Each of the drawings described in the following embodiments is a schematic diagram, and the ratios of the sizes and thicknesses of the respective components in each drawing do not necessarily reflect the actual dimensional ratios. Also, the dimensional ratios of the respective elements are not limited to the ratios illustrated in the drawings.

[0013] [1.1 Embodiment 1] [1.1.1 Configuration] FIG. 1 is a schematic diagram of a configuration example of a rain gutter system 1 according to Embodiment 1. The rain gutter system 1 is a type of piping system. The rain gutter system 1 receives rainwater from the roof 10a of the building 10 and flows it to the catch basin 12 on the ground 11. The rainwater collected in the catch basin 12 flows out from the catch basin 12 through the buried pipe 13 into the rainwater pipe. The building 10 is, for example, a building of 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 house, or each dwelling unit of a detached house or an apartment house. Non-residential facilities also include theaters, cinemas, halls, amusement arcades, complex facilities, department stores, hotels, inns, kindergartens, libraries, museums, art galleries, underground shopping streets, stations, and airports.

[0014] The rain 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 FIGS. 2 to 4, the eaves gutter support structure 4 includes an eaves gutter 2 and a receiver 3. The eaves gutter support structure 4 in FIG. 2 includes a plurality of receivers 3. The number and positions of the receivers 3 may be appropriately set according to the shape of the building 10 and the like.

[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 of the roof 10a of the building 10. In particular, the eaves gutter 2 is arranged to extend along the eaves of the roof 10a of the building 10.

[0018] As shown in FIGS. 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 protrusion 23. The first side wall 21 and the second side wall 22 are also referred to as standing walls.

[0019] The bottom wall 20 is plate-shaped with a length, width and thickness. The bottom wall 20 in FIG. 2 is rectangular plate-shaped. In the length direction of the bottom wall 20, the width and thickness of the bottom wall 20 are substantially constant. A drain opening 20a is formed in the bottom wall 20 according to the overall design of the rain 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 on the building 10 side in the width direction of the bottom wall 20, and the first side wall 21 extends upward from the end on the side opposite to the building 10 in the width direction of the bottom wall 20. The first side wall 21 and the second side wall 22 are plate-shaped with 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 substantially constant. In the length direction of the second side wall 22, the width and thickness of the second side wall 22 are substantially constant.

[0021] The protruding portion 23 is located at the upper end 21a of the first side wall 21 and protrudes inside 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 toward the bottom wall 20 side of the eaves gutter 2, and a third piece 233 extending from the tip of the second piece 232 toward the first side wall 21 side of the eaves gutter 2. In a plane orthogonal to the length direction of the bottom wall 20 of the eaves gutter 2, the protruding portion 23 is substantially U-shaped.

[0022] In the present 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, that is, 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 can be, for example, made of metal.

[0023] In the present embodiment, the eaves gutter 2 has a predetermined shape by extrusion molding of a resin material and is transported to the site. Different from the case of forming the eaves gutter with a metal plate, for example, a steel plate (also called a coil), it does not involve on-site processing. Specifically, since there is no need to perform on-site operations such as cutting the coil, bending the coil, applying a sealant for sealing joints, and curing, there is no problem of increasing the on-site man-hours, and the construction of the rain gutter system 1 can be easily carried out.

[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 sides in the length direction of the bottom wall 20 of the eaves gutter member 2a. The end members 2b and 2c are plate-shaped members that cover the openings on both sides in the length direction of the bottom wall 20 of the eaves gutter member 2a. The eaves gutter 2 in FIG. 2 includes three members, namely, the eaves gutter member 2a and the end members 2b and 2c, and the eaves gutter member 2a includes the bottom wall 20, the first side wall 21, the second side wall 22, and the protruding portion 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 hole 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 Pipe", 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 hole 20a shown in Fig. 2 is also set to 131 mm. When the center of the drain hole 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 hole 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 hole 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 such that 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 such that 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] The eaves gutter 2 preferably has a capacity such that rainwater does not overflow until the siphon phenomenon occurs. However, with the sizes of the eaves gutters proposed conventionally, the reduction of overflow was not sufficient. In the eaves gutter 2 of the present embodiment, as described above, for the purpose of reducing the drainage performance, W≥200 mm. From the viewpoint of preventing overflow, consider the case where W = 200 mm. In the eaves gutter 2, it is known that the siphon phenomenon does not occur instantaneously and it takes a certain amount of time until the siphon phenomenon occurs. Then, considering the time taken until the siphon phenomenon occurs when the rainfall amount is 160 mm / h, it was found that if there is no overflow until 16 seconds have elapsed since the rain started falling, the siphon phenomenon enables the drainage of rainwater without overflowing as it is. Therefore, from such a viewpoint, the eaves gutter 2 in FIG. 5 preferably satisfies H2≥200 mm. Thereby, it is possible to secure a sufficiently safe height of the eaves gutter 2 in consideration of the lead time until the siphon phenomenon occurs.

[0033] From the viewpoint of further ensuring a sufficient margin, the eaves gutter 2 preferably satisfies W≥240 mm. The eaves gutter 2 more preferably satisfies W≥350 mm.

[0034] Since the eaves gutter 2 is relatively thin, if W becomes too large, it may be difficult to maintain the shape of the eaves gutter 2 itself. From this viewpoint, the eaves gutter 2 preferably satisfies W≤450 mm. The eaves gutter 2 more preferably satisfies W≤400 mm.

[0035] In the eaves gutter 2, when W increases, the moment of the force applied to the receiver 3 by the first side wall 21 increases. When the moment of the force applied to the receiver 3 increases, the required strength of the receiver 3 may increase. Therefore, it is preferable that W is not too large. When W becomes larger than H2, the eaves gutter 2 has an overall flat shape. When the eaves gutter 2 has a flat shape, the rainwater that has fallen from the roof 10a into the eaves gutter 2 hits the bottom wall 20 and bounces out of the eaves gutter 2 to the outside, increasing the possibility. That is, there is a possibility that the eaves gutter 2 becomes less likely to 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 influence of wind and the like. From the above, in 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, when H2 increases, the eaves gutter 2 has an overall vertically long shape. When the eaves gutter 2 has a vertically long shape, the vertical dimension of the eaves gutter 2 becomes too large with respect to the thickness of the roof 10a. From the above, it is preferable that the eaves gutter 2 satisfies H2 / W≦2.5.

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

[0038] FIG. 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 coupling portion 33, a connecting portion 34, and a fixing portion 35.

[0039] As shown in FIG. 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 plate-shaped having a length, a width, and a thickness.

[0040] The fixing portion 35 extends downward from the first end in the length direction of the support portion 30. The fixing portion 35 and the support portion 30 are plate-shaped having a length, a width, and a 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 portion 31 and the second arm portion 32 extend upward from both sides of the support portion 30. Each of the first arm portion 31 and the second arm portion 32 is plate-shaped having a length, a width, and a thickness. The first arm portion 31 is coupled to the support portion 30 by a fixing portion 35. The first arm portion 31 is fixed to the support portion 30 by coupling the lower end portion of the first arm portion 31 to the fixing portion 35 with a screw 3c. The second arm portion 32 is integrally formed with the support portion 30 so as to extend upward from the second end in the length direction of the support portion 30.

[0042] As shown in FIG. 4, the first arm portion 31 corresponds to the first side wall 21 of the eaves gutter 2. The first arm portion 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 on the side opposite to the second side wall 22 in the first side wall 21. As shown in FIG. 4, the second arm portion 32 corresponds to the second side wall 22 of the eaves gutter 2. The second arm portion 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 on the side opposite to the first side wall 21 in the second side wall 22.

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

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

[0045] The dimensions of the coupling part 33 can be set in consideration of, for example, g1 and g2 in FIG. 4. g1 in FIG. 4 is the dimension (vertical dimension) of the space between the protruding part 23 and the first piece 331 of the coupling part 33. g2 in FIG. 4 is the dimension (vertical dimension) of the region where the protruding part 23 and the second piece 332 of the coupling part 33 overlap. As an example, g1 may be 1 mm or less. g2 may satisfy g2 ≧ 2×g1. By setting in this way, even when the eaves gutter 2 is bent by wind or the like, the protruding part 23 of the eaves gutter 2 is less likely to come off from the coupling part 33. Note that the numerical values of g1 and g2 above are merely examples. The dimensions of the coupling part 33 may be set so that the coupling part 33 is coupled to the protruding part 23 and no event such as coming off due to wind or the like occurs. By appropriately setting g1 and g2, the ease of coupling between the coupling part 33 and the protruding part 23 can be appropriately set.

[0046] Since the protruding part 23 is coupled to the coupling part 33, the first side wall 21 of the eaves gutter 2 can be supported by the receiver 3. Thereby, deformation of the eaves gutter 2, particularly deformation of the first side wall 21, for example, the first side wall 21 falling inward (toward the second side wall 22) or conversely the first side wall 21 falling outward (opposite to the second side wall 22) can be reduced.

[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, compared with the case where the entire eaves gutter is formed of a metal plate, the strength of the first side wall 21 and the second side wall 22 is reduced. The first side wall 21 and the second side wall 22 are liable to receive a relatively large force due to the pressure from rainwater or the like accumulated in the eaves gutter 2, the influence of wind pressure, or the like. An eaves gutter entirely formed of a metal plate is directly fixed to the receiver by screws or the like. However, considering the reduction in the 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 may contribute to damage to the first side wall 21 and the second side wall 22 themselves. In the present embodiment, since the protruding part 23 of the eaves gutter 2 is fitted into the recess 333 of the coupling part 33 of the receiver 3, the protruding part 23 is coupled to the coupling part 33, so there is no need to use screws or the like, and damage to the eaves gutter 2 is prevented.

[0048] The connecting part 34 connects the first arm part 31 and the second arm part 32 on the upper surface side of the bottom wall 20 of the eaves gutter 2. By the connecting part 34, the first arm part 31 and the second arm part 32 are suppressed from deforming in a direction away from each other. Thereby, even if the first side wall 21 and the second side wall 22 of the eaves gutter 2 tend to deform in a direction away from each other, the first arm part 31 and the second arm part 32 reduce the possibility of such deformation. The connecting part 34 in FIG. 6 connects the upper end of the first arm part 31 and the upper end of the second arm part 32. The connecting part 34 in FIG. 6 has a first part 341 extending from the upper end of the first arm part 31 toward the second arm part 32 side and a second part 342 extending from the upper end of the second arm part 32 toward the first arm part 31 side. The first part 341 is integrally formed with the first arm part 31. The second part 342 is integrally formed with the second arm part 32. The first part 341 and the second part 342 are coupled to each other by a screw 3d. The screw 3d may be used for attaching the receiving tool 3 to the roof 10a of the building 10.

[0049] The receiving tool 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 formed of a metal material. The first member 3a in FIG. 6 includes the first arm part 31, the coupling part 33, and the first part 341 of the connecting part 34. The first member 3a is formed by bending a metal plate material. The metal plate material has, for example, substantially constant width and thickness in the length direction. Therefore, the first arm part 31, the coupling part 33, and the first part 341 of the connecting part 34 are formed from the same metal plate material.

[0050] FIG. 7 is a partially enlarged view of the receiving tool 3. As shown in FIG. 7, the first arm part 31 is formed from a metal plate material 300. The coupling part 33 is formed by bending a part of the metal plate material 300. In FIG. 7, the coupling part 33 is formed by cutting and raising a central part 301 in the width direction of the metal plate material 300. By forming the coupling part 33, an opening 302 exists in the metal plate material 300.

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

[0052] Examples of the metal plate material used for forming the first member 3a and the second member 3b include galvanized steel plates. As an example, the thickness of the metal plate material is about 3 mm to 4 mm. As an example, the width of the metal plate material is about 20 mm. In this case, the width of the connecting portion 33 may be about 10 mm.

[0053] In the eaves gutter support structure 4 of the present embodiment, the receiver 3 is attached to the eaves gutter 2 as shown in Figs. 2 to 4. In particular, when attaching the eaves gutter 2 to the receiver 3, the bottom wall 20, the first side wall 21, and the second side wall 22 of the eaves gutter 2 are arranged to be in contact with the support portion 30, the first arm portion 31, and the second arm portion 32 of the receiver 3, respectively. Further, the protruding portion 23 of the eaves gutter 2 is coupled to the coupling portion 33 of the receiver 3. In this way, the eaves gutter 2 has the protruding portion 23 located at the upper end of the first side wall 21 coupled to the coupling portion 33 of the receiver 3. Thereby, the deformation of the eaves gutter 2 is reduced.

[0054] The drain 5 is disposed at the drain opening 20a of the eaves gutter 2. The drain 5 reduces the generation of vortices and the entrainment of air at the drain opening 20a. The drain 5 can contribute to the occurrence of the siphon phenomenon. The drain 5 may have a well-known configuration.

[0055] The drainage portion 6 is installed to drain rainwater from the drain opening 20a of the eaves gutter 2 to the rainwater collecting portion 12. The drainage portion 6 in Fig. 1 includes a downspout 61, a leader 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 leader 62 is 1 m, and the length of the auxiliary downspout 65 is 0.2 m.

[0056] The vertical downspout 61 forms a flow path for vertically flowing rainwater from the drain opening 20a of the eaves gutter 2. The vertical downspout 61 is in a straight tubular shape. The cross-section orthogonal to the pipe axis of the vertical downspout 61 is circular. The material of the vertical downspout 61 is, for example, rigid polyvinyl chloride. The dimensions of the vertical downspout 61, for example, the outer shape and thickness, may be set in accordance with the standards of the rigid polyvinyl chloride pipe (general) of JIS K 6741 "Rigid Polyvinyl Chloride Pipe". The vertical downspout 61 in FIG. 1 is arranged such that the direction of the pipe axis of the vertical downspout 61 coincides with the vertical direction (up-down direction). The vertical downspout 61 has an upstream end and a downstream end. The upstream end of the vertical downspout 61 is the end (the upper end in FIG. 1) connected to the drain opening 20a in the vertical downspout 61. The downstream end of the vertical downspout 61 is the end (the lower end in FIG. 1) inserted into the step portion 12 in the vertical downspout 61. In FIG. 1, a drain pipe cover 61a is arranged so that rainwater does not flow into the step portion 12 from the gap between the vertical downspout 61 and the step portion 12.

[0057] In the drainage part 6 of FIG. 1, the vertical downspout 61 is not directly connected to the drain opening 20a. In the drainage part 6, the vertical downspout 61 is connected to the drain opening 20a via a leader 62, a first elbow 63, a second elbow 64, and an auxiliary vertical downspout 65.

[0058] The leader 62 is a part for flowing rainwater from the drain opening 20a of the eaves gutter 2 to the vertical downspout 61 from the building 10. The leader 62 is between the drain opening 20a of the rainwater from the building 10 and the vertical downspout 61. The leader 62 forms a flow path for flowing rainwater from the drain opening 20a substantially horizontally. The leader 62 has an upstream end and a downstream end. The upstream end of the leader 62 is the end (the left end in FIG. 1) connected to the drain opening 20a in the leader 62. The downstream end of the leader 62 is the end (the right end in FIG. 1) connected to the vertical downspout 61 in the leader 62.

[0059] The first elbow 63 connects the upstream end of the waste pipe 62 to the drain opening 20a. The first elbow 63 does not necessarily directly connect the upstream end of the waste pipe 62 to the drain opening 20a, but may be a member that indirectly connects the upstream end of the waste pipe 62 to the drain opening 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 receivers for connecting pipe materials such as the vertical pipe 61 and the waste pipe 62 to the first elbow 63. The angle between the central axes of the upstream and downstream receivers is, for example, 91.17° as defined in JIS K 6739, "Rigid Polyvinyl Chloride Pipe Fittings for Drainage". The inner and outer corner portions of the first elbow 63 in the plane including the pipe axis of the first elbow 63 are not R-shaped but substantially right-angled.

[0060] The second elbow 64 connects the downstream end of the waste pipe 62 to the upstream end of the vertical pipe 61. The second elbow 64 does not necessarily directly connect the downstream end of the waste pipe 62 to the upstream end of the vertical pipe 61, but may be a member that indirectly connects the downstream end of the waste pipe 62 to the upstream end of the vertical pipe 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 receivers for connecting pipe materials such as the vertical pipe 61 and the waste pipe 62 to the second elbow 64. The angle between the central axes of the upstream and downstream receivers is, for example, 91.17° as defined in JIS K 6739, "Rigid Polyvinyl Chloride Pipe Fittings for Drainage". The inner and outer corner portions of the second elbow 64 in the plane including the pipe axis of the second elbow 64 are not R-shaped but substantially right-angled.

[0061] The dimensions of the first elbow 63 and the dimensions of the second elbow 64 may be set, for example, in accordance with the standards of JIS K 6739, "Rigid Polyvinyl Chloride Pipe Fittings for Drainage". At least one of the first elbow 63 and the second elbow 64 may be a 90° bend elbow defined in JIS K 6739.

[0062] The auxiliary vertical downspout 65 is a part for vertically flowing rainwater from the drain opening 20a to the first elbow 63 from the building 10. The auxiliary vertical downspout 65 is located between the drain opening 20a and the first elbow 63. The auxiliary vertical downspout 65 is straight tubular. The cross-section orthogonal to the pipe axis of the auxiliary vertical downspout 65 is circular. The material of the auxiliary vertical downspout 65 is rigid polyvinyl chloride. The dimensions of the auxiliary vertical downspout 65, for example, the outer shape and thickness, may be set in accordance with the standards of the rigid polyvinyl chloride pipe (general) of JIS K 6741 "Rigid Polyvinyl Chloride Pipe". The auxiliary vertical downspout 65 in Fig. 1 is arranged between the drain opening 20a and the first elbow 63 so that the direction of the pipe axis of the auxiliary vertical downspout 65 coincides with the vertical direction (plumb direction). The auxiliary vertical downspout 65 has an upstream end and a downstream end. The upstream end of the auxiliary vertical downspout 65 is the end connected to the drain opening 20a in the auxiliary vertical downspout 65 (the upper end in Fig. 1). The downstream end of the auxiliary vertical downspout 65 is the end connected to the first elbow 63 in the auxiliary vertical downspout 65 (the lower end in Fig. 1).

[0063] [1.1.2 Effects, etc.] The eaves gutter 2 described above includes a bottom wall 20 and first and second side walls 21 and 22 extending upward from both sides in the width direction of the bottom wall 20. 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, the height of the first side wall 21 be 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 be L2, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 be θ2, the height of the second side wall 22 be H2, and the width of the bottom wall 20 be W. Then, H1 = L1cosθ1, H2 = L2cosθ2, |θ1| ≤ 10°, |θ2| ≤ 10°, H1 ≥ H2, W ≥ 200 mm, H2 ≥ 200 mm are satisfied. 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 degradation of drainage performance and the occurrence of overflow.

[0067] In the eaves gutter 2, W ≥ 240 mm is satisfied. This configuration can reduce the degradation of drainage performance and the occurrence of overflow.

[0068] In the eaves gutter 2, W ≥ 350 mm is satisfied. This configuration can reduce the degradation of drainage performance and the occurrence of overflow.

[0069] In the eaves gutter 2, W ≤ 450 mm is satisfied. This configuration can reduce the degradation of drainage performance and the occurrence of overflow.

[0070] In the eaves gutter 2, W ≤ 400 mm is satisfied. This configuration can reduce the degradation of drainage performance and the occurrence of overflow.

[0071] In the eaves gutter 2, with θ1 having 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 as the positive direction, θ1 ≥ 0° is satisfied. This configuration can reduce the degradation of drainage performance and the occurrence of overflow.

[0072] In the eaves gutter 2, with θ2 having 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 as the positive direction, θ2 ≥ 0° is satisfied. This configuration can reduce the degradation of drainage performance and the 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 form the eaves gutter 2 at the construction site, thus enabling an improvement in workability.

[0074] The above-mentioned flat receiver 3 supports the eaves gutter 2. The eaves gutter 2 is located at the upper end 21a of the first side wall 21 and includes a protruding portion 23 that protrudes inside the eaves gutter 2. The receiver 3 includes a support portion 30 that 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, first and second arm portions 31, 32 that extend upward from both sides of the support portion 30, and a coupling portion 33 that is located on the first arm portion 31 and couples to the protruding portion 23 of the eaves gutter 2 from above. This configuration can reduce the deformation of the eaves gutter 2 that can reduce the deterioration of drainage performance and the occurrence of overflow.

[0075] In the receiver 3, the first arm portion 31 is formed from a metal plate material 300. The coupling portion 33 is formed by bending a part of the metal plate material 300. This configuration enables the simplification of the structure of the receiver 3 and the reduction of 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 the deformation of the eaves gutter 2.

[0077] The above-mentioned eaves gutter support structure 4 includes an eaves gutter 2 and a receiver 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 includes a protruding portion 23 that protrudes inside the eaves gutter 2. The receiver 3 includes a support portion 30 that 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, first and second arm portions 31, 32 that extend upward from both sides of the support portion 30, and a coupling portion 33 that is located on the first arm portion 31 and couples 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 for molding the eaves gutter 2 at the construction site, thus enabling an improvement in workability.

[0079] [1.2 Embodiment 2] [1.2.1 Configuration] FIG. 8 is a cross-sectional view of a configuration example of the 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 receiver 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, 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, and the height of the first side wall 21 be H1. The eaves gutter 2A satisfies H1 = L1. That is, 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, 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, and the height of the second side wall 22 be 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 of FIG. 9 satisfies H1 ≥ H2. That is, the eaves gutter 2 satisfies L1 ≥ L2. In particular, in the eaves gutter 2A of FIG. 9, H1 > H2.

[0084] The eaves gutter 2A of FIG. 9 satisfies W ≥ 200 mm and H2 ≥ 200 mm. It is preferable that the eaves gutter 2A satisfies W ≥ 240 mm. It is more preferable that the eaves gutter 2A satisfies W ≥ 350 mm. It is preferable that the eaves gutter 2A satisfies W ≤ 450 mm. It is more preferable that the eaves gutter 2A satisfies W ≤ 400 mm.

[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 of the roof 10a of the building 10. The receiver 3A includes a support portion 30, first and second arm portions 31, 32, a coupling portion 33, a connecting portion 34, and a fixing portion 35. In the receiver 3A, the first arm portion 31 and the second arm portion 32 extend upward along the thickness direction of the support portion 30 from both sides of the support portion 30.

[0087] [1.2.2 Effects, etc.] The above-described eaves gutter 2A includes a bottom wall 20, and first and second side walls 21, 22 that extend upward from both sides in the width direction of the bottom wall 20. 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 height of the first side wall 21 be 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 be L2, the height of the second side wall 22 be H2, and the width of the bottom wall 20 be W. Then, H1 = L1, H2 = L2, H1 ≥ H2, W ≥ 200 mm, and H2 ≥ 200 mm are satisfied. This configuration can reduce the decrease in drainage performance and the occurrence of overflow.

[0088] The above-described receiver 3A supports the eaves gutter 2A. The eaves gutter 2A is located at the upper end 21a of the first side wall 21 and includes a protruding portion 23 that protrudes inside the eaves gutter 2A. The receiver 3A includes 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 arm portions 31, 32 that extend upward from both sides of the support portion 30, and a coupling portion 33 that is located at the first arm portion 31 and couples to the protruding portion 23 of the eaves gutter 2A from above. This configuration can reduce the deformation of the eaves gutter 2 that can reduce the decrease in drainage performance and the occurrence of overflow.

[0089] The above-mentioned flat eaves gutter support structure 4A includes an eaves gutter 2A and a receiver 3A for supporting 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 inside the eaves gutter 2A. The receiver 3A includes 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 arm portions 31, 32 that extend upward from both sides of the support portion 30, and a coupling portion 33 that is located on the first arm portion 31 and couples 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 Embodiment 3] [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 receiver 3B.

[0091] The receiver 3B in FIG. 10 includes a support portion 30, first and second arm portions 31, 32, a coupling portion 33B, a connecting portion 34, and a fixing portion 35.

[0092] The coupling portion 33B in FIG. 10 is located on the first arm portion 31. The coupling portion 33B is configured to couple to the protruding portion 23 of the eaves gutter 2 from above. The coupling portion 33B in FIG. 10 includes a first piece 331 that extends from the first arm portion 31 toward the second arm portion 32 side, a second piece 332 that extends from the tip of the first piece 331 toward the support portion 30 side, and a detachment prevention piece 334 that extends from the tip of the second piece 332 toward the support portion 30 side. The coupling portion 33B forms a recess 333 between the first piece 331 and the second piece 332 and the first arm portion 31. 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 joint 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, whereby the state in which the protruding portion 23 is positioned within the recess 333 of the joint portion 33B can be maintained. Since the detachment prevention piece 334 has elasticity, when detaching the protruding portion 23 from the joint portion 33B, the detachment prevention piece 334 may be 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 is fixed by a so-called snap fit so that the protruding portion 23 does not come off from the joint portion 33B.

[0094] [1.3.2 Effects, etc.] In the receiving member 3B described above, the joint portion 33B includes a detachment prevention piece 334 that 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 joint portion 33B. This configuration can reduce the possibility that the joint between the joint portion 33 and the protruding portion 23 unintentionally comes off.

[0095] [1.4 Embodiment 4] [1.4.1 Configuration] FIG. 11 is a cross-sectional view of a configuration example of the 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 member 3C.

[0096] The receiving member 3C in FIG. 11 includes a support portion 30, first and second arm portions 31, 32, a joint portion 33C, a connecting portion 34, and a fixing portion 35.

[0097] The joint portion 33C in FIG. 11 is located on the first arm portion 31. The joint portion 33C is configured to be joined to the protruding portion 23 of the eaves gutter 2 from above. The joint portion 33C in FIG. 11 includes a fixing piece 335 fixed to the first arm portion 31, a first piece 331 extending from the fixing piece 335 toward the second arm portion 32 side, and a second piece 332 extending from the tip of the first piece 331 toward the support portion 30 side. The joint portion 33C forms a recess 333 between the first arm portion 31 by 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.

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

[0099] FIG. 12 is a partially enlarged view of the receiver 3C. As shown in FIG. 12, the joint portion 33C is fixed to the first arm portion 31 by welding. In the present embodiment, the joint portion 33C is fixed to the first arm portion 31 by welding the fixing piece 335 of the joint portion 33C to the first arm portion 31. Examples of the method of welding the fixing piece 335 of the joint portion 33C to the first arm portion 31 include spot welding.

[0100] As an example of the metal plate material used for forming the first member 3a, the second member 3b, and the coupling portion 33C, a plated steel sheet can be mentioned. The coupling portion 33C does not require as high a strength as the first member 3a and the second member 3b. Therefore, the metal plate material for forming the coupling portion 33C may be thinner than the metal plate materials for forming the first member 3a and the second member 3b. As an example, the thickness of the metal plate material for forming the first member 3a and the second member 3b is about 3 mm to 4 mm, and the thickness of the metal plate material for forming the coupling portion 33C is about 2 mm.

[0101] In the present embodiment, the coupling portion 33C is not integrally formed with the first arm portion 31 and is a separate member. Therefore, the design of the coupling portion 33C can be performed independently of the design of the first arm portion 31. Thus, the degree of freedom in the design of the coupling portion 33C can be improved.

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

[0103] [1.5 Embodiment 5] [1.5.1 Configuration] FIG. 13 is a cross-sectional view of a configuration example of the eaves gutter support structure 4D according to the present embodiment. The eaves gutter support structure 4D in FIG. 13 includes an eaves gutter 2 and a receiver 3D.

[0104] The coupling portion 33D in FIG. 13 is located at the first arm portion 31. The coupling portion 33D is configured to be coupled to the protruding portion 23 of the eaves gutter 2 from above. The coupling portion 33D in FIG. 13 includes a mounting piece 336 attached to the first arm portion 31, a first piece 331 extending from the mounting piece 336 toward the second arm portion 32 side, and a second piece 332 extending from the tip of the first piece 331 toward the support portion 30 side. The coupling portion 33D forms a recess 333 between the first arm portion 31 by the first piece 331 and the second piece 332. The recess 333 is sized to receive the protruding portion 23 of the eaves gutter 2.

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

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

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

[0108] In the eaves gutter support structure 4D of the present embodiment, when attaching the eaves gutter 2 to the receiver 3D, the coupling part 33D is positioned at the second position. After that, 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 part 30, the first arm part 31, and the second arm part 32 of the receiver 3D, respectively. Next, the coupling part 33D is moved from the second position to the first position, and the protruding part 23 of the eaves gutter 2 is coupled to the coupling part 33D of the receiver 3D. As a result, it becomes possible to easily couple the coupling part 33D and the protruding part 23.

[0109] [1.5.2 Effects, etc.] In the receiver 3D described above, the coupling part 33D is movable between a first position where it couples with the protruding part 23 and a second position where it does not couple with the protruding part 23. This configuration enables easier coupling of the coupling part 33D and the protruding part 23.

[0110] In the receiver 3D, the coupling part 33D is rotatably attached to the first arm part 31 between the first position and the second position. This configuration enables easier coupling of the coupling part 33D and the protruding part 23.

[0111] [1.6 Embodiment 6] [1.6.1 Configuration] FIG. 15 is a cross-sectional view of a configuration example of the 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 receiver 3E.

[0112] FIG. 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 protruding part 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, a width, and a 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 the thickness of the first side wall 21 are substantially constant. In the length direction of the second side wall 22, the width and the thickness of the second side wall 22 are substantially constant.

[0113] In the present 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 such that the center in the width direction is located outside the eave gutter 2E with respect to 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 is curved such that the center in the width direction is located outside the eave gutter 2E with respect to a second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22. In FIG. 16, for the sake of clarity of the drawing, the first straight line S1 is illustrated by being shifted parallel from between the upper end 21a and the lower end 21b. The second straight line S2 is illustrated by being shifted parallel from between the upper end 22a and the lower end 22b.

[0114] In the eave gutter 2E of FIG. 16, let the length of a 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 eave gutter 2E satisfies H1 = L1cosθ1. In the eave 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 eave gutter 2E of FIG. 16, let the length of a 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 eave gutter 2E satisfies H2 = L2cosθ2. In the eave 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 eave gutter 2E of FIG. 16 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. 16) is defined as the positive direction. The eave gutter 2E preferably satisfies θ1 ≥ 0°.

[0117] The eave gutter 2E of FIG. 16 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. 16) is defined as the positive direction. The eave gutter 2E preferably satisfies θ2 ≥ 0°.

[0118] The eaves gutter 2E in Fig. 16 satisfies H1≧H2. That is, the eaves gutter 2E satisfies L1cosθ1≧L2cosθ2. In particular, for the eaves gutter 2E in Fig. 16, H1 > H2.

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

[0120] Regarding the relationship between H2 and W, it is preferable that the eaves gutter 2E satisfies H2 / W≧0.5. It is more preferable that the eaves gutter 2E satisfies H2 / W≧2 / 3. It is preferable that the eaves gutter 2E 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 of the roof 10a of the building 10. The receiver 3E includes a support portion 30, first and second arm portions 31, 32, a coupling portion 33, a connecting portion 34, and a fixing portion 35. In the receiver 3E, the first arm portion 31 and the second arm portion 32 are curved in accordance with the shapes of the first side wall 21 and the second side wall 22.

[0122] [1.6.2 Effects, etc.] The above-described eaves gutter 2E includes a bottom wall 20, and first and second side walls 21, 22 that extend upward from both sides in the width direction of the bottom wall 20. 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, the height of the first side wall 21 be 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 be L2, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 be θ2, the height of the second side wall 22 be H2, and the width of the bottom wall 20 be W. Then, H1 = L1cosθ1, H2 = L2cosθ2, |θ1|≦10°, |θ2|≦10°, H1≧H2, W≧200mm, H2≧200mm are satisfied. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0123] [1.7 Embodiment 7] [1.7.1 Configuration] FIG. 17 is a cross-sectional view of a configuration example of the 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 receiver 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 inside the eaves gutter 2. The inside of the eaves gutter 2 is a 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 the present embodiment, the bottom wall 20, the first side wall 21, the second side wall 22, and the protruding portions 23 and 24 are integrally formed. The bottom wall 20, the first side wall 21, the second side wall 22, and the protruding portions 23 and 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 of 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 can be, for example, made of metal.

[0127] The receiver 3F in FIG. 17 includes a support portion 30, first and second arm portions 31 and 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 coupling portion 37 is located on the second arm portion 32. The second coupling portion 37 is configured to be coupled to the second protruding portion 24 of the eaves gutter 2 from above. The second coupling portion 37 in FIG. 17 includes a first piece 371 extending from the second arm portion 32 toward the first arm portion 31 side, and a second piece 372 extending from the tip of the first piece 371 toward the support portion 30 side. The second coupling portion 37 forms a recess 373 between the second arm portion 32 by 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 dimension of the second coupling part 37 can be set such that the second protruding part 24 does not come off from the second coupling part 37 during the normal use of the rain gutter system, that is, the second protruding part 24 does not slip out from the recess 373 of the second coupling part 37. In the installation environment of the rain gutter system, the eaves gutter 2F may sway in the wind. In such a case, it is desirable that the second protruding part 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 of a metal material. The first member 3a in Fig. 17 includes a first arm part 31, a first coupling part 33, and a first part 341 of the connecting part 34. The first member 3a is formed by bending a metal plate material. The metal plate material has, for example, substantially constant width and thickness in the length direction.

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

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

[0133] [1.7.2 Effects, etc.] The above-mentioned flat eaves gutter 2F includes a bottom wall 20, and first and second side walls 21 and 22 extending upward from both sides in the width direction of the bottom wall 20. 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, the height of the first side wall 21 be 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 be L2, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 be θ2, the height of the second side wall 22 be H2, and the width of the bottom wall 20 be W. Then, H1 = L1cosθ1, H2 = L2cosθ2, |θ1| ≤ 10°, |θ2| ≤ 10°, H1 ≥ H2, W ≥ 200 mm, H2 ≥ 200 mm. This configuration can reduce the decrease in drainage performance and the occurrence of overflow.

[0134] The above-mentioned receiver 3F supports the eaves gutter 2F. The eaves gutter 2F includes a first protrusion 23 located at the upper end 21a of the first side wall 21 and protruding inward of the eaves gutter 2F, and a second protrusion 24 located at the upper end 22a of the second side wall 22 and protruding inward of the eaves gutter 2F. The receiver 3F includes 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 and 32 extending upward from both sides of the support portion 30, a first coupling portion 33 located at the first arm portion 31 and coupling to the first protrusion 23 of the eaves gutter 2F from above, and a second coupling portion 37 located at the second arm portion 32 and coupling to the second protrusion 24 of the eaves gutter 2F from above. This configuration can reduce the deformation of the eaves gutter 2F that can reduce the decrease in drainage performance and the occurrence of overflow.

[0135] The above-mentioned flat eaves gutter support structure 4F includes an eaves gutter 2F and a receiver 3F that supports the eaves gutter 2F. The eaves gutter 2F includes a bottom wall 20, and first and second side walls 21 and 22 that extend upward from both sides in the width direction of the bottom wall 20. 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, the height of the first side wall 21 be 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 be L2, the angle between the thickness direction of the bottom wall 20 and the second straight line S2 be θ2, the height of the second side wall 22 be H2, and the width of the bottom wall 20 be W. Then, H1 = L1cosθ1, H2 = L2cosθ2, |θ1| ≤ 10°, |θ2| ≤ 10°, H1 ≥ H2, W ≥ 200 mm, H2 ≥ 200 mm are satisfied. The eaves gutter 2F includes a first protrusion 23 that is located at the upper end 21a of the first side wall 21 and protrudes inside the eaves gutter 2F, and a second protrusion 24 that is located at the upper end 22a of the second side wall 22 and protrudes inside the eaves gutter 2F. The receiver 3F includes a support portion 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 portions 31 and 32 that extend upward from both sides of the support portion 30, a first coupling portion 33 that is located at the first arm portion 31 and is coupled to the first protrusion 23 of the eaves gutter 2F from above, and a second coupling portion 37 that is located at the second arm portion 32 and is coupled to the second protrusion 24 of the eaves gutter 2F from above. This configuration can reduce the deterioration of drainage performance and the occurrence of overflow.

[0136] [2. Modification Example] The embodiments of the present disclosure are not limited to the above embodiments. The above embodiments can be variously modified according to design and the like as long as the problems of the present disclosure can be achieved. Hereinafter, modification examples of the above embodiments will be listed. The modification examples described below can be applied in appropriate combinations.

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

[0138] In a modified example, the coupling portion 37 may have a detachment prevention piece similar to the detachment prevention piece 334 of the coupling portion 33B. The coupling portion 37 may be fixed to the second arm portion 32 by welding. The coupling portion 37 may be movable between a first position where it couples to the protruding portion 24 and a second position where it does not couple to the protruding portion 24. In this case, the coupling portion 37 may be rotatably attached to the second arm portion 32 between the first position and the second position.

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

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

[0141] In a modified example, the eaves gutter 2 does not necessarily have to include any of the protruding portions 23, 24. However, if the eaves gutter 2 includes at least one of the protruding portions 23, 24, it becomes possible to attach it to the roof 10a using the receiver 3.

[0142] In a 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 such that the center in the width direction is located inside the eaves gutter 2 rather than on 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 such that the center in the width direction is located inside the eaves gutter 2 rather than on a second straight line S2 connecting the upper end 22a and the lower end 22b of the second side wall 22.

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

[0144] [3. Aspect] As is apparent from the above-described embodiments and modified examples, the present disclosure includes the following aspects. Hereinafter, for the sole purpose of clarifying the correspondence with the embodiments, reference numerals are attached in parentheses. Note that the description of the reference numerals in parentheses may be omitted after the second time for the sake of readability of the text.

[0145] A first aspect is an eaves gutter (2; 2A; 2E; 2F), comprising 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 the length of a 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, the height of the first side wall (21) be 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) be L2, the angle between the thickness direction of the bottom wall (20) and the second straight line (S2) be θ2, the height of the second side wall (22) be H2, and the width of the bottom wall (20) be W. Then, H1 = L1cosθ1, H2 = L2cosθ2, |θ1| ≤ 10°, |θ2| ≤ 10°, H1 ≥ H2, W ≥ 200 mm, H2 ≥ 200 mm are satisfied. This aspect 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 decrease in 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 decrease in drainage performance and the occurrence of overflow.

[0148] The fourth aspect is the 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 decrease in drainage performance and the occurrence of overflow.

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

[0150] The sixth aspect is the 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 decrease in drainage performance and the occurrence of overflow.

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

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

[0153] Aspect 9 is the eaves gutter (2; 2A; 2E; 2F) based on any one of Aspects 1 to 8. In Aspect 9, θ1 is defined such that 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) is the positive direction, and θ1 ≧ 0°. This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0154] Aspect 10 is the eaves gutter (2; 2A; 2E; 2F) based on any one of Aspects 1 to 9. In Aspect 10, θ2 is defined such that 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) is the positive direction, and θ2 ≧ 0°. This aspect can reduce the deterioration of drainage performance and the occurrence of overflow.

[0155] Aspect 11 is the eaves gutter (2; 2A; 2E; 2F) based on any one of Aspects 1 to 10. In Aspect 11, 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 form the eaves gutter (2; 2A; 2E; 2F) at the construction site, thus improving workability.

[0156] Aspect 12 is a receiver (3; 3A - 3F) that supports an eaves gutter (2; 2A; 2E; 2F) based on any one of Aspects 1 to 11. The eaves gutter (2; 2A; 2E; 2F) is located at 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 protrusions (23, 24) that protrude from at least one of the outer side and the inner side of the eaves gutter (2; 2A; 2E; 2F). The receiver (3; 3A - 3F) includes a support portion (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 arm portions (31, 32) that extend upward from both sides of the support portion (30), and a coupling portion (33; 33B - 33D, 37) that is located at at least one of the first arm portion (31) and the second arm portion (32) and couples to the protrusions (23, 24) of the eaves gutter (2; 2A; 2E; 2F) from above. This aspect can reduce deformation of the eaves gutter (2; 2A; 2E; 2F) that can reduce drainage performance and cause overflow.

[0157] Aspect 13 is a receiver (3; 3A; 3B; 3E; 3F) based on Aspect 12. In Aspect 13, one of the first arm portion (31) and the second arm portion (32) is formed from a metal plate material (300). The coupling portion (33; 33B - 33D, 37) is formed by bending a part of the metal plate material (300). This aspect enables simplification of the structure of the receiver (3; 3A; 3B; 3E; 3F) and reduction of manufacturing costs.

[0158] Aspect 14 is a receiver (3C) based on Aspect 12. In Aspect 14, the coupling 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 the design of the coupling portion (33C).

[0159] The 15th aspect is a receiver (3D) based on the 12th aspect. In the 15th aspect, the coupling part (33D) is movable between a first position where it couples with the protruding part (23) and a second position where it does not couple with the protruding part (23). This aspect enables facilitation of the coupling between the coupling part (33D) and the protruding part (23).

[0160] The 16th aspect is a receiver (3D) based on the 15th aspect. In the 16th aspect, the coupling part (33D) is rotatably attached between the first position and the second position with respect to one of the first arm part (31) and the second arm part (32). This aspect enables facilitation of the coupling between the coupling part (33D) and the protruding part (23).

[0161] The 17th aspect is a receiver (3; 3A - 3F) based on the 12th aspect. In the 17th aspect, the receiver (3; 3A - 3F) is located on the upper surface side of the bottom wall (20) of the eaves gutter (2; 2A; 2E; 2F), and further includes a connecting part (34) that connects the first and second arm parts (31, 32) to each other. This aspect can reduce the 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 1st to 11th aspects, and a receiver (3; 3A - 3F) for supporting the eaves gutter (2; 2A; 2E; 2F). The eaves gutter (2; 2A; 2E; 2F) is located at one of the upper ends (21a) of the first side wall (21) and the upper ends (22a) of the second side wall (22), and is provided with protruding portions (23, 24) protruding at least on one of the outer and inner sides of the eaves gutter (2; 2A; 2E; 2F). The receiver (3; 3A - 3F) includes a support portion (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 arm portions (31, 32) extending upward from both sides of the support portion (30), and a coupling portion (33; 33B - 33D, 37) located at one of the first arm portion (31) and the second arm portion (32) and coupling to the protruding portion (23, 24) of the eaves gutter (2; 2A - 2F) from above. This aspect can reduce the decrease in 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 inside the eaves gutter (2; 2A; 2E; 2F). The coupling portion (33; 33B - 33D) is located at the first arm portion (31) and couples to the protruding portion (23) from above. This aspect can reduce the decrease in drainage performance and the occurrence of overflow.

[0164] The 20th aspect is an eaves gutter support structure (4; 4A - 4F) based on the 18th or 19th aspect. In the 20th 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 can improve workability because there is no need to form the eaves gutter (2; 2A; 2E; 2F) at the construction site.

[0165] The above-described aspects 13 to 17 can be applied by appropriately modifying them to the 18th aspect. The above-described aspects 2 to 11, 13 to 17, 19, and 20 are optional elements.

Industrial Applicability

[0166] The present disclosure is applicable to piping members and a rain gutter system. Specifically, the present disclosure is applicable to a piping member that constitutes a part of a piping system having an elbow that connects a first pipe extending in the horizontal direction and a second pipe extending in the vertical direction, and a rain gutter system for draining rainwater.

Explanation of Signs

[0167] 1 Rain gutter system 2, 2A, 2E, 2F Eaves gutter 20 Bottom wall 21 First side wall 21a Upper end 21b Lower end 22 Second side wall 22a Upper end 22b Lower end 23 Protrusion 24 Protrusion 3, 3A, 3B, 3C, 3D, 3E, 3F Receiver 30 Support part 31 First arm part 32 Second arm part 33, 33B, 33C, 33D Coupling part 34 Connecting part 37 Coupling part 300 Metal plate material 4, 4A, 4B, 4C, 4D, 4E, 4F Eaves gutter support structure

Claims

1. A gutter system comprising a bottom wall, and first and second side walls extending upward from both sides of the bottom wall in the width direction, wherein a fascia gutter in which a drain opening is formed is provided on the bottom wall, a drain disposed at the drain opening, a drainage part for draining rainwater from the drain opening, a receiver for supporting the fascia gutter, and is integrally formed by extrusion molding of a resin material so as to have a predetermined shape satisfying the bottom wall, the first side wall, and the second side wall, let the length of the first straight line connecting the upper end and the lower end of the first side wall be L1, the angle between the thickness direction of the bottom wall and the first straight line be θ1, the height of the first side wall be H1, the length of the second straight line connecting the upper end and the lower end of the second side wall be L2, the angle between the thickness direction of the bottom wall and the second straight line be θ2, the height of the second side wall be H2, when the width of the bottom wall is W, H1 = L1cosθ1, H2 = L2cosθ2, |θ1| ≤ 10°, |θ2| ≤ 10°, H1 ≥ H2, W ≥ 200 mm, H2 ≥ 200 mm, The center of the drain opening coincides with the center of the bottom wall in the width direction, the distance between the drain opening and the first side wall and the distance between the drain opening and the second side wall are 34.5 mm or more, the receiver, a support part extending in the width direction of the bottom wall of the fascia gutter and supporting the lower surface of the bottom wall, first and second arm parts extending upward from both sides of the support part, and the fascia gutter further includes a protruding part located at one of the upper ends of the first side wall and the upper end of the second side wall and protruding outward from the fascia gutter, the bottom wall, the first side wall, the second side wall, and the protruding part are integrally formed by extrusion molding of a resin material so as to have the predetermined shape, the receiver is located at one of the first arm part and the second arm part, and further includes a coupling part that couples to the protruding part of the fascia gutter from above, A gutter system.

2. The coupling part, a first piece extending from one of the first and second arm parts to the other side, a second piece extending from the tip of the first piece toward the support part side, and the coupling part forms a recess of a size into which the protruding part fits between the first piece and the second piece and the one, when the vertical dimension of the space between the protruding part and the first piece is g1 and the vertical dimension of the region where the protruding part and the second piece overlap is g2, g2 ≥ 2 × g1, The gutter system according to Claim 1.

3. g1 is 1 mm or less, The gutter system according to Claim 2.

4. ​ ​ ​ Comprising a core material for reinforcing the strength of the entire eaves gutter. The rain gutter system according to claim 1.

5. The eaves gutter Comprises an eaves gutter member formed by the bottom wall, the first side wall, the second side wall, and the protruding portion, and having openings on both sides in the length direction of the bottom wall; Terminal members fixed to both sides in the length direction of the bottom wall of the eaves gutter member; Comprising The rain gutter system according to claim 1.

6. The drainage part comprises a downspout, a leader, a first elbow connecting the upstream end of the leader to the drain opening, and a second elbow connecting the downstream end of the leader to the upstream end of the downspout. The rain gutter system according to claim 1.

7. Satisfying H2 / W≥0.5 The rain gutter system according to claim 1.

8. Satisfying H2 / W≥2 / 3 The rain gutter system according to claim 1.

9. Satisfying H2 / W≤2.5 The rain gutter system according to claim 1.

10. Satisfying W≥240 mm The rain gutter system according to claim 1.

11. Satisfying W≥350 mm The rain gutter system according to claim 1.

12. Satisfying W≤450 mm The rain gutter system according to claim 1.

13. Satisfying W≤400 mm The rain gutter system according to claim 1.

14. For θ1, the direction in which the upper end of the first side wall is away from the upper end of the second side wall is defined as the positive direction, Satisfying θ1≥0° The rain gutter system according to claim 1.

15. For θ2, the direction in which the upper end of the second side wall is away from the upper end of the first side wall is defined as the positive direction, Satisfying θ2≥0° The rain gutter system according to claim 1.

16. A construction method of the rain gutter system according to claim 1, Transporting the eaves gutter to the site where the building is located, Forming the drain opening in the bottom wall. Construction method.

17. A construction method of the rain gutter system according to claim 1, Transporting the eaves gutter to the site where the building is located, Forming the drain opening in the bottom wall, Installing the eaves gutter at the eaves tip of the roof of the building by means of the receiver. Construction method.

18. A construction method of the rain gutter system according to claim 1, Transporting the eaves gutter to the site where the building is located, Forming the drain opening in the bottom wall, Installing the eaves gutter at the eaves tip of the roof of the building by means of the receiver, When attaching the eaves gutter to the receiver, the bottom wall of the eaves gutter is arranged to contact the support portion of the receiver, and further, the protruding portion of the eaves gutter is coupled to the coupling portion of the receiver. Construction method.

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